POLLUTION DIARY
- TO VIEW PRE-COVID-19 DATA - |
- The Pollutants: I record four out of the five most toxic air pollutants associated with vehicles. I don't measure Ammonia (NH3).
- The Flow device: this measured as 90-95% accurate when compared with professional static monitors. Most of my data comes from one point close to the new Blind Company on Greenstreet/A2. The advantage of the Flow device is that it can measure "on the move". This allows me to create maps in real time in different stretches of road/lane around Greenstreet and show how pollution spreads a long way into our communities.
- Air Quality Indicators: These are based on EU, USA, and WHO thresholds for harmful pollutants over 1 hour, 24 hours, and a year.
- There are no known "safe levels" of PM2.5. This very fine form of pollution has many impacts, depending on the mix and size of particles (soot, soot binding to toxins, minerals, metals, organic compounds, and ozone)
- You will notice that pollution episodes can spread overnight.
AIR QUALITY INDICATOR (AQI) USED ON THIS SITE
(Bear in mind, there are no known lower safety levels for PM2.5;
W.H.O has also lowered the threshold of harm, but I am sticking with the thresholds set in the UK)
| Toxic Pollution Levels | Exceedances (time and duration) | |||||||
| Date | PM2.5 | PM10 | NO2 | VOCs | Daily Average |
High (24 hours or more) |
Very High + (1 hour or more) |
Graphs, Maps and Comments |
| 2022 | ||||||||
| 18th Sept | 5 | 20 | 6 | 11 | MODERATE | LOW in the morning but HIGH/VERY HIGH peaks 14.10pm tp 23.30pm. | ||
| 19th Sept | 4 | 17 | 8 | 12 | LOW | LOW in the morning but continuous peaks from 11.00am to 23.00pm. No exceedance though. | ||
| 20th Sept | 5 | 20 | 8 | 13 | MODERATE | EXCEEDANCE! |
Exceedance of PM10 from 18.00pm to 19.40pm. Otherwise a LOW day. | |
| 6th Oct | 6 | 34 | 4 | 11 | MODERATE | Between 14.34 and 20.40pm there was a cluster of seven VERY HIGH peaks.Technically, this is NOT an exceedance but IS a very serious pollution event. | ||
| 8th Oct | 5 | 21 | 2 | 10 | MODERATE | Between 16.10 and 18.48pm there was a cluster of four VERY HIGH peaks.Technically, this is NOT an exceedance but IS a very serious pollution event. | ||
| 19th Oct | 8 | 48 | 4 | 11 | MODERATE | EXCEEDANCE! for over 5 HOURS! |
Two major peaks at VERY HIGH levels. The first between 13.54-14.50pm and ann EXCEEDANCE between 19.40 (Wednesday) to 01.00 (Thursday) | |
| 20th Oct | 8 | 36 | 4 | 14 | MODERATE | EXCEEDANCE! |
08.36 to 09.40 - EXCEEDANCE at VERY HIGH pollution. Two isolated VERY HIGH peaks 22.45 and 23.40pm. | |
| 1st Nov | 14 | 49 | 0 | 13 | MODERATE | EXCEEDANCE! - 2 periods of more than one hour (3 other worrying periods) |
A DANGEROUS DAY to be out and about. Four extended periods of VERY HIGH pollution: Exceedances: 02.25-03.45am; 15.25-1635. Significant peaks (not one hour continuous exceedances):0905-0949; 10.00-10.57 (near miss); 18.10-18.55. | |
Comments: Over recent weeks, there have a series of Pollution Exceedances. Progressively, the bulk of measurements have become "Moderate" rather than Low. This makes the case for continuous monitoring rather than the inadequate policy of Swale Borough Council who rely on ANNUAL averages of only Nitrogen Dioxide in Greenstreet. That is why they can suggest rescinding the AQMA5 status. Although they are also trying to persuade us that pollution is SO BAD that we need a bypass! Make up your minds SBC!
NOTE: The static measurements that I have been making are taken along the A2 but West of the AQMA5.
Bear in mind that the measurements made by SBC have only relatively recently been relevant once they responded to Lynsted with Kingsdown Parish Council's criticism that SBC 'diffusion tubes' were sited unrealistically high above the heads of pedestrians.
SBC also fails to test for the more harmful PM2.5, PM10, and VOCs.
The appearance is that SBC would rather NOT know how much physical harm their planning decisions have on our DAILY lives!
| Toxic Pollution Levels | Exceedances (time and duration) | |||||||
| Date | PM2.5 | PM10 | NO2 | VOCs | Daily Average |
High (24 hours or more) |
Very High + (1 hour or more) |
Graphs, Maps and Comments |
| 2021 | ||||||||
| 2021 - MARCH - [FLOW 2 TAKES OVER] | ||||||||
| 1st March | 45 | 40 | 16 | 8 | MODERATE | PM10 at VERY HIGH 9.30 peak | ||
| 2nd March | 54 | 52 | 5 | 14 | HIGH | EXCEEDANCE | Marginal (+/- 10%) | Saw-toothed throughout the day. Heavy traffic. |
| 3rd March | 71 | 68 | 4 | 12 | HIGH | EXCEEDANCE | Clearly an Exceedance | Both PMs all day saw-toothed. Bulging in pm. |
| 4th March | 32 | 33 | 0 | 10 | MODERATE | Many High and Very High peaks midnight to 8.30am. Then low the remainder of the day | ||
| 5th March | 23 | 25 | 16 | 8 | MODERATE | Full mix of pollutants. Spike of PM10 at 7pm | ||
| 6th March | 5 | 17 | 2 | 12 | LOW | FLOW 2: Calm to 8am then rugged profile throughout the rest of the day. | ||
| 7th March | 7 | 25 | 2 | 12 | MODERATE | Very sharp peaks at 4am, 8 and 9am before heavier pollution from 8pm. | ||
| 8th March | 17 | 40 | 7 | 17 | MODERATE | Heavy pollution from 3am to 11am, then calmer. | ||
| 9th March | 6 | 21 | 10 | 24 | MODERATE | VOC is the most serious; substantial peak 1.45 to 3pm | ||
| 10 March | 5 | 20 | 3 | 26 | MODERATE | VOC was the culprit from 8am to 11am. Otherwise pretty flat. | ||
| 11th March | 5 | 23 | 6 | 29 | MODERATE | Very serious pollution from 5am - 7am and another extended peak 11.30am-12.30pm | ||
| 12th March | 5 | 26 | 6 | 19 | MODERATE | EXCEEDANCE | Only just registers an Exceedance of PM10 from 5.50-6.50 in the early morning. From11am it is very flat throughout. | |
| 13th March | 4 | 11 | 4 | 17 | LOW | Some peaks, one bigger at 6.30pm but overall a good air day. | ||
| 14th March | 4 | 11 | 4 | 14 | LOW | Lovely Day. Only peak at 10.30am | ||
| 15th March | 4 | 16 | 4 | 11 | LOW | Serious peak at 9.20am | ||
| 16th March | 6 | 36 | 3 | 11 | MODERATE | Unremarkable until 6.20pm through midnight with many VERY HIGH peaks in PM10. | ||
| 17th March | 13 | 82 | 2 | 10 | HIGH | EXCEEDANCE | EXCEEDANCE | Very firm 24-hour and hourly exceedances based on dangerous air from midnight to 12.30pm at VERY HIGH |
| 18th March | 7 | 48 | 2 | 11 | MODERATE | EXCEEDANCE | 09.13 - 10.13 VERY HIGH Exceedance (PM10) also VERY HIGH peak at 3.30pm | |
| 19th March | 6 | 20 | 3 | 11 | MODERATE | Very marginal. (+/- 10%) | ||
| 20th March | 5 | 18 | 6 | 12 | LOW | Two peaks 10.15am and 11.30 am, otherwise clean. | ||
| 21st March | 6 | 31 | 7 | 13 | MODERATE | Large peaks between 9.00am and 9.00pm. | ||
| 22nd March | 7 | 19 | 9 | 15 | LOW | Marginal measurement (+/- 10%) | ||
| 23rd March | 5 | 19 | 6 | 26 | MODERATE | Prolonged pollution 7-9am (PM10) and 4-7pm (VOC) | ||
| 24th March | 5 | 22 | 6 | 20 | MODERATE | Heavy PM10 pollution between 5am - 8am. Then calmer. | ||
| 25th March | 4 | 11 | 6 | 22 | MODERATE | VOCs higher in early evening; very clean morning | ||
| 26th March | 4 | 12 | 4 | 18 | LOW | 10.40 - 11.10 Sharp peak in PM10. Otherwise very clean | ||
| 27th March | 4 | 15 | 5 | 12 | LOW | A GOOD day to be out and about. No serious peaks. | ||
| 28th March | 5 | 23 | 7 | 15 | MODERATE | Good until a series of PM10 High/Very High Peaks between 4pm-8.30pm but no exceedance. | ||
| 29th March | 5 | 23 | 7 | 16 | MODERATE | Calm until midday when there were five High/Very High peaks into the night. | ||
| 30th March | 6 | 23 | 10 | 11 | MODERATE | Generally calm but with five High/Very High peaks especially from 8pm | ||
| 31st March | 6 | 28 | 12 | 16 | MODERATE | Very serious 'patches' of peak High PM10 at 1am, 11am, 4pm, and 930pm. | ||
| 2021 - APRIL - FLOW 2 | ||||||||
| 1 April | 9 | 33 | 3 | 9 | MODERATE | Between 9am - 2pm there was a cluster of High Pollution - PM10 | ||
| 2 April | 4 | 16 | 2 | 6 | LOW | We are talking SERIOUSLY clean air all day | ||
| 3 April | 6 | 44 | 2 | 7 | MODERATE | Saturday. What a difference a day makes! Continuous peaks of High pollution from 3am to 10pm. All PM10 | ||
| 4 April | 4 | 21 | 5 | 13 | MODERATE | Calm but Moderate peaks with one sharp peak at 8.40pm (PM10) | ||
| 5 April | 4 | 15 | 3 | 10 | LOW | Beautifully clear but for one peak at 10.50pm (PM10) | ||
| 6 April | 4 | 14 | 6 | 10 | LOW | High Polution (VOCs) 11.30am to midday. Otherwise a very good day. | ||
| 7 April | 4 | 14 | 10 | 10 | LOW | A Good day to be exerting yourself! Clean Air. | ||
| 8 April | 4 | 10 | 8 | 18 | ----- | Incomplete data after midday. Internet break perhaps or server down? Not sure. | ||
| 9 April | 4 | 13 | 9 | 24 | MODERATE | Friday. VOCs dominant until 9.25 - 0950pm with PM10 peaks | ||
| 10 April | 5 | 24 | 2 | 10 | MODERATE | Saturday. Frequent PM10 peaks throughout the day with a partial lull between 11.30am-8.00pm (PM10) | ||
| 11 April | 5 | 17 | 7 | 10 | LOW | Five High peaks - 3.30am, 9.40am and cluster after midday. Lowest from 3.30pm | ||
| 12 April | 4 | 11 | 8 | 12 | LOW | Lockdown keeps on delivering! | ||
| 13 April | 4 | 13 | 13 | 19 | LOW | 2.45-3.30pm High peak (VOC). That's pretty much it. | ||
| 14 April | 6 | 18 | 10 | 13 | LOW | Saw-toothed peaks all day - traffic continuous all day - but not to worry - one minor High peak at 7.50am | ||
| 15 April | 4 | 15 | 7 | 12 | LOW | Saw-toothed peaks all day - traffic continuous all day - but not to worry | ||
| 16 April | 4 | 16 | 7 | 11 | LOW | Very low except 7.40 - 10.10am PM10 series of High Peaks. | ||
| 17 April | 4 | 15 | 11 | 12 | LOW | Very low all day, until 10.00 - 10.30pm massive spike of PM10, then calm again. Suggests stuck traffic. | ||
| 18 April | 5 | 15 | 15 | 14 | LOW | Very Low, except a massive PM peak 2.30am to 3.30am - PM10 but also "22" PM2.5! Smaller peak Very High 9.35-9.40pm. Not enough for an Excedance but worrying at night time. | ||
| 19 April | 5 | 17 | 11 | 13 | LOW | Saw-toothed all morning until a massive peak (PM10) at 11.30 am then very LOW. | ||
| 20 April | 11 | 28 | 4 | 12 | MODERATE | Series of regular sharp peaks all day. PM2.5 dominating until 9.45am |
||
| 21 April | 8 | 58 | 4 | 10 | HIGH | EXCEEDANCE | Thursday. Very High from 2.30-435am. Calmed down from 8.00am. Patchy recording after 2pm | |
| 22 April | 4 | 17 | 14 | 13 | LOW | Strange shape to pollution distribution. Sharp clusters of peaks from midnight to 2.00am; another from 8am to 10.20 then a 'bulge' until 4pm then slow decline. Curious. | ||
| 23 April | 4 | 17 | 8 | 12 | LOW | Some modest peaks but very clean between 8am - 5pm. PM10 peaks. | ||
| 24 April | - | - | - | - | - | INCOMPLETE DATA. | ||
| 25 April | 4 | 17 | 8 | 12 | LOW | Traffic peaks not seriously congested so low all day. | ||
| 26 April | 4 | 14 | 5 | 12 | LOW | Traffic peaks not seriously congested so low all day. One sharp peak at 11.30pm. | ||
| 27 April | 5 | 17 | 12 | 14 | LOW | Significant peaks 7 - 11.30am. Otherwise OK | ||
| 28 April | 6 | 29 | 11 | 13 | MODERATE | Serious peaks all day. Harshest PM10 with some serious VOCs mixed in. | ||
| 29 April | - | - | - | - | - | INCOMPLETE DATA. | ||
| 30 April | 7 | 13 | 10 | 14 | LOW | High peak at 7.30am and again at 10.30pm. Otherwise seriously clean | ||
| 2021 - MAY - FLOW 2 | ||||||||
| 1st May | 4 | 13 | 12 | 13 | LOW | Good day with only two sharp peaks of PM10 and NO2 at 3pm and 6.50pm | ||
| 2nd May | - | - | - | - | - | PARIS SERVER FAILURE | ||
| 3rd May | 4 | 10 | 8 | 15 | LOW | Very Low. Blowing a Gale! | ||
| 4th May | 4 | 14 | 9 | 12 | LOW | Very calm except between 9am and 12am when there was a succession of HIGH and VERY HIGH peaks in PM10 from congestion. Knowing and proving this is only possible with "real time" monitoring. | ||
| 5th May | 4 | 10 | 6 | 10 | LOW | Very LOW except for 1220pm-1310 that touched VERY HIGH | ||
| 6th May | 4 | 11 | 8 | 10 | LOW | Three VERY HIGH and HGH peaks but otherwise calm and LOW | ||
| 7th May | 7 | 15 | 11 | 13 | LOW | LOW except for periods of HIGH - 0245-0340; 0750-0810; and 2250-2310pm | ||
| 8th May | 7 | 12 | 7 | 21 | MODERATE | Very LOW until 1050 when PM10 and VOCs were at serious levels especially peaking at 1250pm, 1540-1610pm, and 1745-1840pm. | ||
| 9th May | 4 | 16 | 14 | 22 | MODERATE | LOW until 100am, sharp peak HIGH at midday then MODERATE to midnight. | ||
| 10th May | 4 | 16 | 7 | 19 | LOW | Only just under MODERATE; peaks from 0940 with a surprisingly sharp and HIGH PM10 at 2335pm. | ||
| 11th May | 5 | 23 | 9 | 14 | MODERATE | HIGH and VERY HIGH peaks of PM10 early morning (0130-0730). Rippling LOW/MODERATE the remainder of the day. | ||
| 12th May | 6 | 32 | 10 | 13 | MODERATE | VERY HIGH peaks of PM10 at 0210, 0640, 0810. Batch of HIGH between 2200-2330pm. Rippling peaks all day | ||
| 13th May | 4 | 12 | 2 | 10 | LOW | Gentle day. Peaks of PM10 all day but not seriously high. | ||
| 14th May | 4 | 12 | 3 | 10 | LOW | Sharp peak of PM10 at 0020am, clean until pronounced peaks between 1640-2110pm. | ||
| 15th May | 6 | 13 | 4 | 13 | LOW | Quiet until midday. VERY HIGH from 1218 to 1252 - avoiding "exceedance" followed by troubling peaks until 1840pm. Very LOW outside this period. | ||
| 16th May | 4 | 22 | 5 | 14 | MODERATE | Serious peaks from midnight 0930am, then quieter. | ||
| 17th May | 4 | 16 | 4 | 12 | LOW | Quiet until 1015am to 1105 VERY HIGH period of PM10. Lesser ripples until 1800pm. | ||
| 18th May | 4 | 13 | 9 | 14 | LOW | Pronounced isolated peaks from 0800am of PM10. Otherwise calm. | ||
| 19th May | 6 | 12 | 5 | 12 | LOW | HIGH and VERY HIGH peaks 1000-1120am and another HIGH peak 1720-1750. Calm at other times. | ||
| 20th May | 4 | 15 | 4 | 14 | LOW | Quiet until 2100 and a series of HIGH peaks of PM10 through midnight. | ||
| 21st May | 9 | 50 | 4 | 17 | HIGH | EXCEEDANCE | FRIDAY. VERY HIGH peaks of PM10 continuous from 0200am to 0750am - just avoiding one hour exceedances at VERY HIGH. Significant peaks throughout the remainder of the day | |
| 22nd May | 4 | 16 | 4 | 12 | LOW | Sharp HIGH peaks stopped at 0400am. Small peaks 1200-1300pm. Otherwise flat. | ||
| 23rd May | 4 | 10 | 7 | 12 | LOW | LOW ripples 0900 to 1400pm and again 2230 to midnight. | ||
| 24th May | 4 | 17 | 7 | 12 | LOW | Overnight peaks ended at 0200am. Noticeable peaks 0745-0845 and 1845-1930pm. | ||
| 25th May | 4 | 11 | 6 | 11 | LOW | Flat LOW except 0945-1230pm peaks. | ||
| 26th May | 14 | 16 | 2 | 12 | LOW | Jagged All day. Slightly heavier early until 1600pm when the levels reduced significantly. | ||
| 27th May | 16 | 15 | 1 | 11 | LOW | Significant peaks around 0300am and again around 1500pm. Otherwise modest ripples. | ||
| 28th May | 17 | 20 | 1 | 11 | MODERATE | Marginal reading. Jagged peaks for 24 hours - PM10 dominating. | ||
| 29th May | 18 | 16 | 1 | 11 | LOW | 1230-1350 extended peak but otherwise very LOW. | ||
| 30th May | 19 | 16 | 0 | 11 | LOW | Marginal reading. Continuous peaks above (MODERATE) and below (LOW) throughout the whole day reflecting traffic conditions. | ||
| 31st May | 25 | 24 | 0 | 15 | MODERATE | Firmly MODERATE in daylight hours with pronounced bulge in both PM2.5 and PM10 from 1420 to 1930pm. | ||
| 2021 - JUNE - FLOW 2 | ||||||||
| 1st June | 18 | 19 | 2 | 14 | LOW | Saw-toothed peaks all day. Two noticeable peaks around 1600pm only. | ||
| 2nd June | 22 | 23 | 1 | 14 | MODERATE | Jagged and increasing levels of pollution throughout the day to midnight. VOCs mirrored all day too. | ||
| 3th June | 4 | 9 | 4 | 21 | MODERATE | PM10 very prounounced early morning; VOC takes over from 0900am to day's end. | ||
| 4th June | 4 | 9 | 0 | 13 | LOW | Most activity between 0845 to 1400pm. Very LOW ripples at other times. | ||
| 5th June | 4 | 7 | 7 | 12 | LOW | A really good day throughout. | ||
| 6th June | 4 | 10 | 12 | 16 | LOW | Another good day with isolated peaks between 0400-0500am. | ||
| 7th June | 5 | 18 | 2 | 17 | LOW | EXCEEDANCE | Real-time measurements allow us to see extremes in pollution in days that average LOW. This excedance (0500-0600) was measured amongst a series of VERY HIGH PM10 events from 0455 to 0700am. One other modest HIGH peak at 0950. The "average" was possible because pollution flattened out from 1000am. | |
| 8th June | 4 | 12 | 1 | 17 | LOW | High peaks until 0200am and isolated very high PM10 at 0830am. Calm otherwise. | ||
| 9th June | 11 | 12 | 1 | 18 | LOW | EXCEEDANCE | During a flat day - VERY HIGH plateau just makes an exceedance between 1738-1838 - both PM2.5 and PM10 involved. Very flat otherwise. | |
| 10th June | 6 | 11 | 2 | 16 | LOW | Flat except for pronounced series of HIGH peaks 1130am to 1320pm. | ||
| 11th June | 4 | 10 | 0 | 15 | LOW | MODERATE peaks from 0500 ended with a VERY HIGH peak of PM10 (PM2.5 just a bit lower) 0845am | ||
| 12th June | 4 | 13 | 4 | 11 | LOW | A good day except for pronounced (up to VERY HIGH) between 1230 to 1600pm of PM10. | ||
| 13th June | 4 | 13 | 0 | 14 | LOW | Flat except 0200am and again 1600-1700 series. | ||
| 14th June | 4 | 11 | 2 | 14 | LOW | Calm day until 2300 to midnight sharp peaks of PM10. | ||
| 15th June | 4 | 11 | 5 | 10 | LOW | LOW jagged line with one High Peak at 0720am. | ||
| 16th June | 4 | 16 | 0 | 18 | LOW | LOW with VERY HIGH peak at 0730am and 1230pm, lesser peaks in between. | ||
| 17th June | 7 | 12 | 4 | 13 | LOW | Modest pollution but for a short VERY HIGH peak at 0150am. | ||
| 18th June | 5 | 17 | 0 | 10 | LOW | Peaking to MODERATE until 0700am, then again between 1050-1350pm and 1700-1850pm. | ||
| 19th June | 4 | 18 | 0 | 9 | LOW | Flat and safely LOW all day until 2050 HIGH & VERY HIGH peaks until midnight. | ||
| 20th June | 8 | 17 | 3 | 11 | LOW | Continuation of peaks overnght to 01.30am. Significant peaks 07.30-09.00am, 12.20pm and 17.40-19.00pm reflecting traffic congestion. | ||
| 21st June | 4 | 20 | 0 | 11 | LOW | Overnight HIGH peaks 01.30-04.00am. | ||
| 22nd June | 4 | 19 | 3 | 12 | LOW | PM10 VERY HIGH sharp peak at 17.30pm. | ||
| 23rd June | 4 | 16 | 9 | 13 | LOW | Successive peaks rising from midnight to 13.20pm then flat in single figures. | ||
| 24th June | 4 | 7 | 10 | 16 | LOW | A very good day. No noticeable peaks. | ||
| 25th June | 4 | 5 | 2 | 16 | LOW | A very good day. No noticeable peaks. | ||
| 26th June | 4 | 9 | 1 | 13 | LOW | A very good day. No noticeable peaks. | ||
| 27th June | 16 | 30 | 0 | 12 | MODERATE | Sunday. Heavy traffic all day - congestion HIGH peaks 03.30-04.45 and 16.00-midnight. | ||
| 28th June | 9 | 26 | 0 | 13 | MODERATE | Frequent (sawtooth) peaks all day and night. | ||
| 29th June | 4 | 9 | 0 | 12 | LOW | A very good day except for HIGH peaks 14.20-14.45pm. | ||
| 30th June | 4 | 6 | 0 | 12 | LOW | A very good day. No noticeable peaks. | ||
| 2021 - JULY - FLOW 2 | ||||||||
| 1st July | 4 | 10 | 0 | 15 | LOW | A very good day except for HIGH peak 12.40 | ||
| 2nd July | 4 | 15 | 1 | 23 | MODERATE | Calm except HIGH peaks 10.25am-16.00pm VOC | ||
| 3rd July | 9 | 15 | 4 | 25 | MODERATE | HIGH PM10 - 09.45-10.20am and VOCs 16.30-18.45pm | ||
| 4th July | 4 | 13 | 9 | 15 | LOW | VERY HIGH PM10 Peak 00.50-01.05 | ||
| 5th July | 4 | 15 | 1 | 13 | LOW | Sharp pulses between midnight-05.30 and 10.00am -13.00pm | ||
| 6th July | 5 | 21 | 2 | 14 | MODERATE | VERY HIGH PM10 09.50-10.25am congestion peak.Flirting with exceedance! | ||
| 7th July | 4 | 11 | 15 | LOW | Sawtooth profile but really a very good day. | |||
| 8th July | 4 | 11 | 3 | 15 | LOW | A very good day. No noticeable peaks. | ||
| 9th July | 5 | 17 | 1 | 16 | LOW | VERY HIGH & HIGH PM10 peaks 12.10-14.20pm | ||
| 10th July | 4 | 7 | 4 | 14 | LOW | A very good day. No noticeable peaks. | ||
| 11th July | 4 | 5 | 1 | 16 | LOW | A VERY good day. No noticeable peaks. | ||
| 12th July | 4 | 6 | 3 | 3 | LOW | A VERY good day. No noticeable peaks. | ||
| 13th July | 4 | 9 | 0 | 16 | LOW | A VERY good day. No noticeable peaks. | ||
| 14th July | 16 | 15 | 1 | 12 | LOW | Started with series of marked peaks to 0800am, then flat. | ||
| 15th July | 4 | 5 | 2 | 32 | MODERATE | A day dominated by VOCs. Midnight HIGH peak. | ||
| 16th July | 4 | 12 | 11 | 30 | MODERATE | Midnight peak ended at 00.25am; HIGH Peak of NO2 - 15.40-18.20pm |
||
| 17th July | 4 | 8 | 1 | 25 | MODERATE | VOCs dominate throughout the day | ||
| 18th July | 4 | 6 | 7 | 22 | MODERATE | Continuous HIGH peak of NO2 - 19.10-20.30pm. Otherwise moderate pollution. | ||
| 19th July | 4 | 5 | 4 | 16 | LOW | A good day - VOCs dominated at a low level. | ||
| 20th July | 4 | 9 | 1 | 13 | LOW | A very good day. One modest peak at 10.40am. | ||
| 21st July | 5 | 23 | 2 | 13 | MODERATE | HIGH PM10 05.05-07.15am. Otherwise Moderate. | ||
| 22nd July | 8 | 18 | 4 | 12 | LOW | Levels of PM10 falling early am. flat thereafter. | ||
| 23rd July | 9 | 20 | 3 | 13 | MODERATE | 18.30-22.00 High and Very High peaks of PM2.5 and PM10. | ||
| 24th July | 11 | 23 | 0 | 13 | MODERATE | Very sharp peaks of PM10 midnight to 08.00am | ||
| 25th July | 8 | 17 | 2 | 12 | LOW | PM10 Peak 0920am. Otherwise tame. | ||
| 26th July | 11 | 20 | 2 | 12 | MODERATE | PM2.5 and PM10 sharp peaks all day. | ||
| 27th July | 8 | 16 | 1 | 12 | LOW | Marked PM peaks early morning to 05.00am. 18.00-18.35 HIGH peak of ALL PMs (including PM1) |
||
| 28th July | 4 | 15 | 2 | 16 | LOW | 10.50-11.40am VOCs HIGH peak. | ||
| 29th July | 11 | 23 | 4 | 12 | MODERATE | EXCEEDANCE | 17.20-18.30pm VERY HIGH PM10. Massive injection of all PMs (including PM1). Congestion was very heavy. Exceedance. | |
| 30th July | 4 | 12 | 3 | 12 | LOW | Slightly higher across midday into mid-afternoon. | ||
| 31st July | 4 | 6 | 1 | 23 | LOW | A VERY good day. | ||
| 2021 - AUGUST - FLOW 2 | ||||||||
| 1st August | 4 | 6 | 1 | 12 | LOW | A VERY good day. | ||
| 2nd August | 4 | 11 | 4 | 12 | LOW | A bit rough 01.00am-08.00 but otherwise a very good day. | ||
| 3rd August | 4 | 9 | 2 | 12 | LOW | Calm all day but 23.45 sharp peak of PM10 | ||
| 4th August | 4 | 7 | 2 | 10 | LOW | VERY GOOD DAY! | ||
| 5th August | 4 | 7 | 3 | 10 | LOW | GOOD day (incomplete data - power lost) | ||
| 6th August | 5 | 17 | 4 | 11 | LOW | GOOD day (incomplete data - power interruption) | ||
| 7th August | - | - | - | - | - | Data interruption - lost sychronisation | ||
| 8th August | 15 | 16 | 1 | 12 | LOW | "Saw tooth" profile. | ||
| 9th August | 14 | 15 | 2 | 11 | LOW | GOOD DAY | ||
| 10th August | 4 | 15 | 2 | 11 | LOW | Good Day | ||
| 11th August | 4 | 9 | 3 | 12 | LOW | All Good but one sharp HIGH peak PM10 19.20pm | ||
| 12th August | 4 | 14 | 2 | 12 | LOW | Flat to 1600-20.20pm series of sharp peaks PM10 | ||
| 13th August | 4 | 18 | 3 | 12 | LOW | Good day. Peak at 11.45am and 18.00pm PM10 | ||
| 14th August | 18 | 32 | 2 | 13 | MODERATE | EXCEEDANCE | VERY HIGH PM10 at 02.30pm. Then prolonged 17.10-19.00pm Exceedance of PM10 | |
| 15th August | 7 | 25 | 3 | 12 | MODERATE | Sharp peaks especially 10.10am-13.40pm. | ||
| 16th August | 22 | 28 | 6 | 12 | MODERATE | HIGH spiking from midday to midnight (all PMs including PM1). | ||
| 17th August | 4 | 15 | 3 | 13 | LOW | 10.00am spike of HIGH PM10 but otherwise good day. | ||
| 18th August | 4 | 8 | 0 | 12 | LOW | 10.10am spike of Moderate PM10. Flat otherwise. | ||
| 19th August | 4 | 7 | 2 | 13 | LOW | Flat all day. A good one. | ||
| 20th August | 12 | 12 | 1 | 12 | LOW | Flat except for HIGH PMs (all, including PM1) 17.50-20.10pm | ||
| 21st August | 4 | 11 | 4 | 12 | LOW | A very good day all day. | ||
| 22nd August | 4 | 9 | 1 | 12 | LOW | A very good day all day. | ||
| 23rd August | 5 | 24 | 2 | 12 | MODERATE | Four series' of peaks (HIGH and VERY HIGH PM10) during the day. | ||
| 24th August | 6 | 29 | 1 | 12 | MODERATE | EXCEEDANCE | VERY HIGH PM10 - 07.15-08.50. | |
| 25th August | 5 | 15 | 0 | 12 | LOW | Some PM10 peaks throughout the afternoon but nothing very serious. | ||
| 26th August | 4 | 17 | 2 | 12 | LOW | Marked PMs peak all day but not serious. | ||
| 27th August | 5 | 22 | 1 | 12 | MODERATE | 'Sawtooth' peaks all day of PM10. | ||
| 28th August | 5 | 20 | 1 | 12 | MODERATE | Sawtooth peaks all day. High PM10 19.45pm | ||
| 29th August | 4 | 12 | 2 | 12 | LOW | Swatooth all day but modest. | ||
| 30th August | 6 | 29 | 0 | 12 | MODERATE | Calm morning. HIGH and VERY HIGH PM10 peaks 14.15-19.45pm. No exceedances. | ||
| 31st August | 5 | 26 | 0 | 13 | MODERATE | EXCEEDANCE | VERY HIGH PM10 - 10.30-11.50am. | |
| 2021 - SEPTEMBER - FLOW 2 | ||||||||
| 1st Sept | 5 | 22 | 1 | 12 | MODERATE | Saw-toothed with higher peaks 09.45-10.15am | ||
| 2nd Sept | 6 | 26 | 1 | 12 | MODERATE | Saw-toothed peaks all day. Continuous traffic all day. | ||
| 3rd Sept | 7 | 37 | 1 | 12 | MODERATE | HIGH peaks from 10.30am to midnight | ||
| 4th Sept | 17 | 36 | 0 | 12 | MODERATE | Peaks all day but especially early morning to 0700am and after 21.00pm. | ||
| 5th Sept | 16 | 29 | 1 | 11 | MODERATE | Midnight to 01.50 reducing HIGH peaks of PM10, then calmer peaks remainder of the day. | ||
| 6th Sept | 10 | 27 | 2 | 13 | MODERATE | Peaks all day. Sharp peak at 11am. | ||
| 7th Sept | 6 | 21 | 3 | 12 | MODERATE | HIGH and VERY HIGH peaks PMs until midday. | ||
| 8th Sept | 8 | 16 | 1 | 13 | LOW | Saw-toothed until 14.00pm when the profile settles down. | ||
| 9th Sept | 7 | 12 | 1 | 12 | LOW | PMs peaks at 0400am, 10.00am and 18.10pm. Otherwise very flat. | ||
| 10th Sept | 4 | 15 | 2 | 13 | LOW | Very sharp peaks 0230-0400am and one at midday. Otherwise calm. | ||
| 11th Sept | 7 | 10 | 1 | 12 | LOW | PM10 peak at 0110am and 17.40pm. Calm otherwise. | ||
| 12th Sept | 4 | 13 | 6 | 11 | LOW | PM10 peaks 0330-0415am. then flat. | ||
| 13th Sept | 4 | 13 | 1 | 12 | LOW | Saw-toothed throughout. A Good Day. | ||
| 14th Sept | 6 | 18 | 0 | 13 | LOW | Growing peaks from 0400-11.45am then flat. Afternoon was very good clean air. | ||
| 15th Sept | 5 | 17 | 2 | 12 | LOW | VERY HIGH peak at 0200am and again at 1150am. Flat otherwise. | ||
| 16th Sept | 13 | 15 | 1 | 13 | LOW | A good day except 0800-1000am modest peaks | ||
| 17th Sept | 16 | 13 | 1 | 15 | LOW | Only one significant peak at 1820pm | ||
| 18th Sept | 4 | 14 | 3 | 12 | LOW | VERY HIGH peaks 0130am and 1000am. Flat otherwise | ||
| 19th Sept | 16 | 14 | 1 | 16 | LOW | Flat except a bulge 1400-1800pm VOCs | ||
| 20th Sept | 4 | 17 | 5 | 12 | LOW | 01.30-04.40am period of marked peaks then flat. | ||
| 21st Sept | 6 | 24 | 0 | 12 | MODERATE | Flat except for 16.55-1900pm VERY HIGH peaks. Two small HIGH troughs break the mass - so technically not an EXCEEDANCE | ||
| 22nd Sept | 5 | 17 | 0 | 13 | LOW | VERY HIGH peaks 0400am, 1945pm, 2020pm, 2035pm. Flat before thes peaks. | ||
| 23rd Sept | 6 | 11 | 1 | 13 | LOW | Saw-toothed profile. Good. | ||
| 24th Sept | 4 | 11 | 2 | 12 | LOW | A good day throughout. | ||
| 25th Sept | 4 | 12 | 1 | 12 | LOW | Two brief peaks but otherwise flat. | ||
| 26th Sept | 4 | 14 | 2 | 12 | LOW | Early morning peaks then flat. Good daylight hours. | ||
| 27th Sept | 4 | 15 | 2 | 12 | LOW | Clear day until 2010pm - peaks. | ||
| 28th Sept | 5 | 26 | 0 | 11 | MODERATE | HIGH peaks 13.45-14.30pm and saw-toothed | ||
| 29th Sept | 4 | 13 | 0 | 12 | LOW | A good day with isolated peak 21.45pm | ||
| 30th Sept | 4 | 14 | 6 | 12 | LOW | 13.25pm isolated peak. | ||
| 2021 - OCTOBER - FLOW 2 | ||||||||
| 1st Oct | 5 | 17 | 6 | 12 | LOW | A Very good day with sharp peak 23.30pm. | ||
| 2nd Oct | 4 | 16 | 4 | 12 | LOW | 05.00am peak but otherwise a very good day. | ||
| 3rd Oct | 4 | 15 | 3 | 12 | LOW | Saw-toothed. Higher moderate peaks from midday. | ||
| 4th Oct | 6 | 27 | 5 | 12 | MODERATE | 0015-0115am VERY HIGH peaks of PM10 otherwise tame. | ||
| 5th Oct | 4 | 11 | 2 | 12 | LOW | A very good day throughout. | ||
| 6th Oct | 6 | 18 | 4 | 12 | LOW | Very good from midnight to 20.00pm onwards of peaks. | ||
| 7th Oct | 8 | 39 | 6 | 13 | MODERATE | 3 x EXCEEDANCES | THREE EXCEEDENCES: 23.50-00.50am; 0218-0325; 04.30-05.50. Only calmed down after midday. | |
| 8th Oct | 4 | 10 | 1 | 12 | LOW | A VERY good day. | ||
| 9th Oct | 12 | 17 | 5 | 11 | LOW | Peaks 0200-0400, then calm all day. | ||
| 10th Oct | 9 | 13 | 6 | 12 | LOW | A good day becomes a better day. | ||
| 11th Oct | 4 | 14 | 3 | 12 | LOW | A good day to out and about. | ||
| 12th Oct | 4 | 13 | 4 | 12 | LOW | Saw-toothed but very good. | ||
| 13th Oct | 5 | 20 | 5 | 12 | MODERATE | Two bands of High/VERY High pollution pushed the 24-hour figures to the margin LOW /MODERATE | ||
| 14th Oct | 4 | 14 | 10 | 13 | LOW | Low pollution all day until spikes 22.00 to midnight. | ||
| 15th Oct | 7 | 25 | 2 | 12 | MODERATE | EXCEEDANCE | 15.00-16.20pm Exceedance. Morning was flat. | |
| 16th Oct | 6 | 26 | 6 | 13 | MODERATE | 0615am-14.20pm - series of serious peaks. | ||
| 17th Oct | 7 | 36 | 8 | 12 | MODERATE | 04.40-06.20 VERY HIGH PM10. Flatter from 08.00am onwards but for a Very High peak at 22.00pm. | ||
| 18th Oct | 5 | 22 | 3 | 13 | MODERATE | Four "Very High" peaks between 5am-8am. Otherwise LOW. | ||
| 19th Oct | 6 | 10 | 1 | 13 | LOW | One notable High peak of PM0.1 and PM2.5 at 1800. Othewise flat. | ||
| 20th Oct | 5 | 23 | 1 | 12 | MODERATE | Calm morning. A Very high peak of 20 minutes from 11.20am. Evening multiple High peaks. | ||
| 21st Oct | 5 | 22 | 0 | 10 | MODERATE | Jagged peaks throughout as traffic 'pulsed through all day. Surprising marked peaj at 2.00am! | ||
| 22nd Oct | 4 | 17 | 5 | 12 | LOW | Very High peak at 01.45am. Pulsing traffic to midday then flat. | ||
| 23rd Oct | 4 | 13 | 7 | 12 | LOW | Jagged all day but nothing to scare the horses. | ||
| 24th Oct | 4 | 14 | 4 | 14 | LOW | Sharp High peak at 10.25am. Flat for the rest of the day. | ||
| 25th Oct | 4 | 15 | 3 | 13 | LOW | 'Sawtooth' pattern. | ||
| 26th Oct | 4 | 16 | 4 | 13 | LOW | 'Sawtooth' pattern. | ||
| 27th Oct | 4 | 12 | 4 | 13 | LOW | Swatooth pattern | ||
| 28th Oct | 4 | 19 | 0 | 12 | LOW | Heavier peaks from 7.00-11.00am. Otherwise flat. | ||
| 29th Oct | 5 | 23 | 0 | 13 | MODERATE | Very High peak at 11.45am. Hevy around 7.00-10.00pm. | ||
| 30th Oct | 5 | 12 | 2 | 12 | MODERATE | 12.15-2.00pm High peaks. otherwise "moderate" sawtooth. | ||
| 31st Oct | 14 | 37 | 1 | 12 | MODERATE | Serious (High) pollution from 2pm to midnight. | ||
| 2021 - NOVEMBER - FLOW 2 | ||||||||
| 1st Nov | 5 | 25 | 0 | 12 | MODERATE | Serious peaks between 09.00am to 15.00pm. Calm into the evening. | ||
| 2nd Nov | 6 | 18 | 2 | 12 | LOW | A sharp Very High peak at 11.00am. | ||
| 3rd Nov | 4 | 15 | 4 | 12 | LOW | Sawtooth all day. | ||
| 4th Nov | 4 | 17 | 4 | 12 | LOW | Sawtooth all day. | ||
| 5th Nov | 21 | 15 | 21 | 8 | MODERATE | FL01: High Pollution (NOx) all afternoon through midnight. Guy Fawkes. | ||
| 6th Nov | 20 | 16 | 24 | 18 | MODERATE | FL01:Continued High Pollution (NOx) to 0600am. Then more moderate | ||
| 7th Nov | 19 | 24 | 14 | 14 | MODERATE | FL01: Sawtooth all day | ||
| 8th Nov | 5 | 26 | 3 | 12 | MODERATE | Sawtooth all day - pulsing traffic.. | ||
| 9th Nov | 4 | 10 | 9 | 12 | LOW | Isolated modest peaks. A good Tuesday to be out! | ||
| 10th Nov | 5 | 9 | 3 | 12 | LOW | Another very good day to be out and about. | ||
| 11th Nov | 4 | 8 | 2 | 12 | LOW | Another very good day to be out and about. | ||
| 12th Nov | 5 | 26 | 3 | 12 | MODERATE | The good air ended at 4pm with very significant peaks of PM10 | ||
| 13th Nov | 6 | 28 | 2 | 12 | MODERATE | Very High series of peak pollution from 7.30-11pm. Dangerous air. | ||
| 14th Nov | 4 | 16 | 1 | 12 | LOW | Marked peaks inmorning. Afternoon very good air. | ||
| 15th Nov | 5 | 12 | 0 | 13 | LOW | Perfect day with an anomylous High Pek at 23.30pm | ||
| 16th Nov | 7 | 11 | 0 | 13 | LOW | Nother good Tuesday! | ||
| 17th Nov | 5 | 25 | 0 | 12 | MODERATE | Low until 0800am. Continuous pulsing peaks the rest of the day. Surprising peaks from 2100-midnight. | ||
| 18th Nov | 4 | 21 | 5 | 13 | MODERATE | Most pollution from midnight to 2am and again at 11am. Otherwise flat. | ||
| 19th Nov | 4 | 9 | 5 | 12 | LOW | A good Friday to be out and about. | ||
| 20th Nov | 4 | 9 | 1 | 13 | LOW | Minor peak at midday. Very clean air otherwise. Saturday. | ||
| 21st Nov | 5 | 23 | 0 | 11 | MODERATE | 820-950am Very High twin peaks. Nearly an exceedance. | ||
| 22nd Nov | 4 | 17 | 2 | 12 | LOW | Sawtooth all day pulsing. Good day. | ||
| 23rd Nov | 5 | 19 | 3 | 12 | LOW | Marginal. Very Low to 2pm then more pronouced peaks. | ||
| 24th Nov | 9 | 15 | 5 | 13 | LOW | A good daytime - hump in early evening (not serious). | ||
| 25th Nov | 4 | 16 | 1 | 12 | LOW | A good clean air day. | ||
| 26th Nov | 5 | 19 | 6 | 13 | LOW | Two higher pollution blocks 2-4pm and 8-9pm | ||
| 27th Nov | 4 | 10 | 1 | 12 | LOW | A good Saturday for all outdoor activities | ||
| 28th Nov | 4 | 15 | 0 | 12 | LOW | Another excellent day for breathing! | ||
| 29th Nov | 5 | 19 | 2 | 12 | LOW | Marginal. High peaks all morning but flat clean the reaminder of the day. | ||
| 30th Nov | 4 | 10 | 17 | 15 | LOW | One peak at midday. Otherwise flat Low. | ||
| 2021 - DECEMBER - FLOW 2 | ||||||||
| 1st Dec | 13 | 21 | 1 | 27 | MODERATE | FL01: VOC dominating the day. | ||
| 2nd Dec | 20 | 29 | 2 | 10 | MODERATE | FL01: Heavy pollution in the morning in particular. | ||
| 3rd Dec | 4 | 8 | 3 | 7 | LOW | Very good Friday. | ||
| 4th Dec | 4 | 9 | 4 | 13 | LOW | Another clean day. | ||
| 5th Dec | 4 | 8 | 0 | 12 | LOW | Great day for a Sunday walk! | ||
| 6th Dec | 4 | 9 | 1 | 12 | LOW | Very good day. | ||
| 7th Dec | 4 | 18 | 3 | 13 | LOW | Marginal. Sharp PM10 peaks at 6am 10-11am. | ||
| 8th Dec | 4 | 18 | 4 | 13 | LOW | Marginal. 'Swatooth' throughout the day. | ||
| 9th Dec | 18 | 23 | 4 | 12 | MODERATE | FL01: Pronouced peaks all day - pulsing traffic. | ||
| 10th Dec | 15 | 22 | 5 | 13 | MODERATE | FL01: Swatooth all day - pulsing. | ||
| 11th Dec | 20 | 22 | 21 | 11 | MODERATE | FL01: High from 4pm-10.15pm - NOx. | ||
| 12th Dec | 14 | 19 | 0 | 23 | MODERATE | FL01: Even throughout the day. Small peak at 10.00am. | ||
| 13th Dec | 4 | 9 | 0 | 12 | LOW | Very clean day. | ||
| 14th Dec | 15 | 16 | 0 | 15 | LOW | Very good day. | ||
| 15th Dec | 4 | 19 | 3 | 12 | LOW | FL01: Marginal. Flat and good morning. Very pronouced from midday. | ||
| 16th Dec | 4 | 16 | 1 | 12 | LOW | Good day except between 3-5pm marked peaks. | ||
| 17th Dec. | 4 | 13 | 0 | 12 | LOW | Friday morning - heavier traffic pulsing. Flat (LOW) from midday. | ||
| 18th Dec | 4 | 11 | 0 | 13 | LOW | Broadly a good day - minor peaks at 11am and 7pm. | ||
| 19th Dec | 4 | 7 | 0 | 13 | LOW | Good clean air with a 'surprise' isolated peak of VOC 4.30pm. | ||
| 20th Dec | 4 | 16 | 1 | 13 | LOW | Pulsing traffic from 10am into the night. PM10 dominant. | ||
| 21st Dec | 6 | 22 | 0 | 12 | MODERATE | Significant pusling from mid-morning to 10pm. | ||
| 22nd Dec | 8 | 14 | 2 | 11 | LOW | Pulsing all day. Good air day. | ||
| 23rd Dec | 8 | 18 | 12 | 16 | LOW | One peak of PM10. Otherwise even spread of pollutants at low levels. | ||
| 24th Dec | 5 | 20 | 7 | 14 | MODERATE | Higher peaks throughout daylight hours. Quieter after 8pm. | ||
| 25th Dec | 14 | 15 | 0 | 12 | LOW | Very noticeable peaks of PM10 between 8-9am. Raised PM2.5 from 7pm onwards. | ||
| 26th Dec | 11 | 11 | 2 | 13 | LOW | Overnight peaks dropped to Low after 4am. Calm day. | ||
| 27th Dec | 9 | 31 | 3 | 16 | MODERATE | Serious PM10 pollution from 4pm peaking at 7.30pm quietening down to 11pm. | ||
| 28th Dec | 4 | 16 | 5 | 13 | LOW | Pulsing PM10 continuously to 3pm then flat Low Pollution. | ||
| 29th Dec | 4 | 18 | 4 | 13 | LOW | Pulsing all day from 7am. Occasional High peaks. | ||
| 30th Dec | 7 | 33 | 7 | 12 | MODERATE | 5.50am to 11am Very High peaks - nearly an Exceedance of PM10. Low pollution from midday. | ||
| 31st Dec | - | - | - | - | No data | Detectors off-line | ||
| 2022 | ||||||||
| 2022 - JANUARY - FLOW 2 | ||||||||
| 1st Jan | 13 | 47 | 0 | 12 | MODERATE | EXCEEDANCE | PM10 Exceedance 5-6am, followed by addition Very High peaks. Again Very High peaks in the evening. Close to a 24-hour Exceedance! .Not a good start to the New Year. | |
| 2nd Jan | 10 | 26 | 0 | 12 | MODERATE | Higher pollution between 6-9pm.- ALL PM Particle sizes down to PM0.1 | ||
| 3rd Jan | 5 | 24 | 0 | 12 | MODERATE | Pulsing pollution 24 hours. | ||
| 4th Jan | 5 | 25 | 0 | 11 | MODERATE | Marked pollution peaks pulsing from 4am to midday. | ||
| 5th Jan | 4 | 23 | 2 | 11 | MODERATE | Most significant from Midday to 7pm | ||
| 6th Jan | 5 | 18 | 1 | 11 | MODERATE | Incomplete data after 6pm | ||
| 7th Jan | 4 | 8 | 8 | 13 | LOW | Very clean air all Friday. | ||
| 8th Jan | 5 | 30 | 6 | 14 | MODERATE | Prouncied block of pollution from 5.30 to 9pm | ||
| 9th Jan | 4 | 16 | 3 | 12 | LOW | Very good Sunday all day. | ||
| 10th Jan | 6 | 32 | 4 | 12 | MODERATE | Very worrying pollution peaks until midday. PM10. | ||
| 11th Jan | 5 | 23 | 11 | 13 | MODERATE | 11.36-12.32 VERY HIGH PM10 - Near Exceedance. | ||
| 12th Jan | 5 | 24 | 1 | 11 | MODERATE | Saw-tooth peaks throughout the day | ||
| 13th Jan | 4 | 17 | 3 | 11 | LOW | Continuous pulses of PM fractions until 4pm. | ||
| 14th Jan | 10 | 28 | 2 | 12 | MODERATE | Series of Very High peaks from 7.08-9.50am. Calming down to midday, then saw-toothed. | ||
| 15th Jan | 17 | 17 | 2 | 12 | LOW | Saw-toothed all day. | ||
| 16th Jan | 4 | 10 | 8 | 13 | LOW | A very good day, all day. | ||
| 17th Jan | 5 | 29 | 1 | 12 | MODERATE | EXCEEDANCE | 0900-10.30 VERY HIGH Exceedance of PM10. Calm throughout the remainder of the day. | |
| 18th Jan | 5 | 25 | 4 | 12 | MODERATE | Peaks pulsing throughout the day. | ||
| 19th Jan | 4 | 12 | 8 | 14 | LOW | Low peaks pulsing throughout the day. | ||
| 20th Jan | 4 | 18 | 0 | 11 | LOW | Lowish peaks pulsing throughout the day. | ||
| 21st Jan | 4 | 14 | 3 | 13 | LOW | Pulsing all day. | ||
| 22nd Jan | 4 | 5 | 6 | 13 | LOW | Very few days are this calm and evenly low. Saturday. | ||
| 23rd Jan | 6 | 10 | 5 | 13 | LOW | Pulsing all day. | ||
| 24th Jan | 9 | 18 | 0 | 12 | LOW | Saw-toothed all day. | ||
| 25th Jan | 14 | 18 | 0 | 12 | LOW | Slowly rising pulses throughout the day. | ||
| 26th Jan | 8 | 31 | 3 | 13 | MODERATE | Series of large peaks until midday. | ||
| 27th Jan | 5 | 21 | 8 | 14 | MODERATE | Six very high peaks of PM10 pollution. Otherwise very clean. | ||
| 28th Jan | 4 | 14 | 5 | 12 | LOW | Marked PM10 peaks until 10am, then flat low levels. | ||
| 29th Jan | 11 | 44 | 12 | 14 | MODERATE | Five Very High pollution peaks (with one registering over 200 at 1.30pm) Very unclean air all day. | ||
| 30th Jan | 5 | 27 | 1 | 11 | MODERATE | Highest peaks around midday | ||
| 31st Jan | 4 | 18 | 3 | 12 | LOW | Highest peaks around 8pm | ||
| 2022 - FEBRUARY - FLOW 2 | ||||||||
| 1st Feb | 4 | 14 | 8 | 14 | LOW | 11.37am very high peak in isolation | ||
| 2nd Feb | 4 | 16 | 6 | 12 | LOW | Series of small peaks from midday. A good day. | ||
| 3rd Feb | 5 | 28 | 1 | 13 | MODERATE | Overnight and at 3pm clusters of high pollution | ||
| 4th Feb | 4 | 18 | 0 | 12 | LOW | Agood day marred by series of high peaks between 9am and midday. | ||
| 5th Feb | 7 | 27 | 7 | 12 | MODERATE | Very high peaks from 4pm after a quiet daytime. | ||
| 6th Feb | 6 | 33 | 12 | 12 | MODERATE | EXCEEDANCE | 4.45am-6.05am VERY HIGH - Exceedance | |
| 7th Feb | 7 | 28 | 4 | 11 | MODERATE | High and Very High peaks from midday to 8pm | ||
| 8th Feb | 5 | 19 | 10 | 13 | LOW | 'Saw-thooth' pattern all day and night. | ||
| 9th Feb | 4 | 15 | 3 | 12 | LOW | 11.10-20am Very High lump but otherwise a very good day. | ||
| 10th Feb | 5 | 28 | 0 | 11 | MODERATE | High/Very High peaks between 7.00am-5pm (clearly at peak times). | ||
| 11th Feb | 7 | 19 | 1 | 11 | LOW | "Saw-toothed" pulses in daylight hours. Marginal | ||
| 12th Feb | 4 | 15 | 5 | 14 | LOW | Really good day, all-day | ||
| 13th Feb | 5 | 23 | 5 | 14 | MODERATE | Significant pulses all day - even though this was a Sunday! | ||
| 14th Feb | 5 | 26 | 3 | 12 | MODERATE | Very High PM10 peaks between 7-10.30am | ||
| 15th Feb | 8 | 44 | 5 | 12 | MODERATE | EXCEEDANCE | VERY HIGH EXCEEDANCE of PM10 - 17.45-21.45 + peaks beyond midnight. Morning was very good. | |
| 16th Feb | 8 | 44 | 12 | 13 | MODERATE | EXCEEDANCE | VERY HIGH EXCEEDANCE of 23.30 to 0200am EXCEEDANCE. Repeated Very High Peaks throughout the remainder of the day. | |
| 17th Feb | 8 | 41 | 2 | 12 | MODERATE | High and Very High peaks all day and night | ||
| 18th Feb | 8 | 37 | 3 | 12 | MODERATE | Clusters of High and Very High peaks between 0020-0400am; 0900-1330pm. Calm afternoon and evening. | ||
| - A CHANGE IN TEMPO - I PLAN ONLY TO RECORD EXCEEDANCES UNLESS A READING STRIKES ME AS INTERESTING OR REVEALING ["MODERATE" is COMMON and worrying over longer periods up to one year. These thresholds are still the UK ones rather than the LOWER safety limits set by the World Health Organisation - WHO] |
||||||||
| 24th March | 60 | 31 | 18 | 13 | HIGH | EXCEEDANCE | Thursday. A very worrying measurement across 24-hours with VERY HIGH peaks throughout the day. | |
| 25th March | 56 | 29 | 12 | 12 | HIGH | EXCEEDANCE | The HIGH pollution carried over into this day until a dip at midday before rising again. PM1 measured at 51. Incomplete measurement after 5pm. | |
| 26th March | 51 | 26 | 4 | 11 | HIGH | EXCEEDANCE | Another worrying day of HIGH pollution BUT the data is incomplete after 11am - fault on the off-site server it appears. PM1 is at 43 | |
| 11th April | 5 | 16 | 12 | 12 | LOW | Interesting only because the "Low" included a VERY HIGH peak between 13.20pm and 2pm. This illustrates how Swale Borough Council measurements HIDE EXCEEDANCES by averaging over a MONTH, let alone a DAY! | ||
| 12th April | 6 | 19 | 23 | 15 | MODERATE | Interesting as yesterday. The average disguises 10.10 to 10.40 VERY HIGH. This pattern applies in many "MODERATE" and "LOW" days throughout the year. | ||
| 1st May | 10 | 21 | 16 | 16 | MODERATE | EXCEEDANCE | Twin Peaks of VERY HIGH (up to 140) from 17.10 to 19.10! Dangerously high pollution at 'going home time'. The average for the day was 21! Again, averages disguise the truth about pollution. | |
| 6th May | 6 | 25 | 12 | 13 | MODERATE | Six VERY HIGH peaks throughout the day (05.20am, 07.15am, 10.15am, 16.25pm, 18.20pm, 20.05pm). But because NONE of these lasted an hour or more - they are NOT exceedances at "VERY HIGH". | ||
| 8th May | 7 | 45 | 4 | 9 | MODERATE | From 10.00am to 15.40pm there was a cluster of individual VERY HIGH PEAKS of dangerous pollution. This does not qualify as a full-blown EXCEEDANCE because the pollution level was not continuous (it dipped into "High"). | ||
| 12 May | 6 | 23 | 6 | 11 | MODERATE | Two clusters of "VERY HIGH" peaks. 11.15am to 13.15pm, then again 18.00pm-20.00pm. | ||
| 15th May | 7 | 50 | 3 | 12 | HIGH | EXCEEDANCE | At "50" the PM10 measurement is 'marginal' but qualifies. VERY HIGH peaks throughout the morning. | |
| 19th May | 6 | 31 | 2 | 12 | MODERATE | Clusters of VERY HIGH and HIGH peaks between 08.10 to 0920; 11.50am to 15.00pm; 21.25 to 23.20. Another "MODERATE" that doesn't tell the whole story! | ||
| 23rd May | 6 | 30 | 0 | 11 | MODERATE | EXCEEDANCE! | VERY HIGH from 11.10am to 12.20. Also 20.48pm to 21.50. DOUBLE EXCEEDANCE! | |
| 24th May | 5 | 19 | 5 | 12 | LOW | VERY HIGH PEAKS between 11.20am and 13.20pm; 18.50pm and 19.40pm. Not enough to be an Exceedance. But disguised as LOW by the average over the day! | ||
| 27th May | 7 | 34 | 8 | 11 | MODERATE | EXCEEDANCE! | VERY HIGH from 07.07 to 08.10. Plus a cluster of VERY HIGH peaks between 03.50am and 05.10am. | |
| 3rd June | 6 | 33 | 11 | 12 | MODERATE | VERY HIGH peaks between 12.30pm to 18.00pm | ||
| 7th June | 6 | 30 | 12 | 15 | MODERATE | EXCEEDANCE! | VERY HIGH from 13.15am to 14.45pm. Further reinforcing the case for CONTINUOUS measurement of the four key pollutants in Teynham/Lynsted, but SBC IS NOT LISTENING. | |
| 4th July to 1st August | - | - | -- | - | LOW | Measuring pollution is NOT all doom and gloom. There was an extraordinary period of "LOW" pollution between these dates with occasional peaks of HIGH and VERY HIGH but not enough to comment on individually. | ||
| 3rd August | 7 | 34 | 0 | 13 | MODERATE | EXCEEDANCE! | Wednesday. VERY HIGH between 19.50pm to 21.00pm. Before 18.00pm this was a very quiet day. |
|
| 19th August | 6 | 25 | 0 | 19 | MODERATE | EXCEEDANCE! |
06.35 to 08.45am EXCEEDANCE - this is one of the worst pollution exceedances this year as it lasted 2 hours of PM10! There was another HIGH peak at midday. | |
| 24th August | 7 | 29 | 0 | 13 | MODERATE | EXCEEDANCE! |
05.50 to 08.20am EXCEEDANCE of PM10 - even worse than 19th August! A new record? With another sharp peak 21.05pm. | |
| 30 August | 6 | 32 | 3 | 12 | MODERATE | EXCEEDANCE! |
EXCEEDANCE from 15.20pm to 16.20pm immediately followed by another 50-minute VERY HIGH peak | |
| 6th Sept | 8 | 27 | 0 | 12 | MODERATE | EXCEEDANCE! |
EXCEEDANCE of PM10 from 01.45 to 02.45am. PM2.5 was also in the HIGH band. Another peak at midday, but otherwise a quiet day | |
| 12th Sept | 5 | 20 | 9 | 14 | MODERATE | Interesting for the HIGH peaks from 05.00am to 07.10am but LOW the remainder of the day. Hence, this was a marginal LOW/MODERATE | ||
| 15th Sept | 6 | 28 | 3 | 11 | MODERATE | EXCEEDANCE! |
05.36am to 06.36 followed by a series of HIGH/VERY HIGH peaks to 10.00am and again at 20.00pm. Only JUST qualifies as an exceedance. | |
| 18th Sept | 5 | 20 | 6 | 11 | MODERATE | LOW in the morning but HIGH/VERY HIGH peaks 14.10pm tp 23.30pm. | ||
| 19th Sept | 4 | 17 | 8 | 12 | LOW | LOW in the morning but continuous peaks from 11.00am to 23.00pm. No exceedance though. | ||
| 20th Sept | 5 | 20 | 8 | 13 | MODERATE | EXCEEDANCE! |
Exceedance of PM10 from 18.00pm to 19.40pm. Otherwise a LOW day. | |
| 6th Oct | 6 | 34 | 4 | 11 | MODERATE | Between 14.34 and 20.40pm there was a cluster of seven VERY HIGH peaks.Technically, this is NOT an exceedance but IS a very serious pollution event. | ||
| 8th Oct | 5 | 21 | 2 | 10 | MODERATE | Between 16.10 and 18.48pm there was a cluster of four VERY HIGH peaks.Technically, this is NOT an exceedance but IS a very serious pollution event. | ||
| 19th Oct | 8 | 48 | 4 | 11 | MODERATE | EXCEEDANCE! for over 5 HOURS! |
Two major peaks at VERY HIGH levels. The first between 13.54-14.50pm and ann EXCEEDANCE between 19.40 (Wednesday) to 01.00 (Thursday) | |
| 20th Oct | 8 | 36 | 4 | 14 | MODERATE | EXCEEDANCE! |
08.36 to 09.40 - EXCEEDANCE at VERY HIGH pollution. Two isolated VERY HIGH peaks 22.45 and 23.40pm. | |
| 1st Nov | 14 | 49 | 0 | 13 | MODERATE | EXCEEDANCE! - 2 periods of more than one hour (3 other worrying periods) |
A DANGEROUS DAY to be out and about. Four extended periods of VERY HIGH pollution: Exceedances: 02.25-03.45am; 15.25-1635. Significant peaks (not one hour continuous exceedances):0905-0949; 10.00-10.57 (near miss); 18.10-18.55. | |
| 15th Dec | ||||||||
