What is the PM10 level in Chelmsford, Essex at the moment?

The PM10 concentration in Chelmsford, Essex is 10.641 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Chelmsford, Essex at the moment?

Currently, Chelmsford, Essex has a sulfur dioxide (SO2) concentration of 0.476 ppb.

What is the ozone (O3) level in Chelmsford, Essex at the moment?

The current ozone (O3) level in Chelmsford, Essex at the moment is 31.601 ppm.

What is the nitrogen dioxide (NO2) level in Chelmsford, Essex at the moment?

Nitrogen dioxide (NO2) level in Chelmsford, Essex at the moment is 4.417 ppb.

Live air quality index in Chelmsford, Essex today

Q: What is the PM2.5 level in Chelmsford, Essex at the moment?

PM2.5 levels in Chelmsford, Essex are currently 4.419 μg/m3.

Stay updated with real-time air quality in Chelmsford, Essex featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Good

Chelmsford, Essex

Last updated: ... (Local time)

Major air pollutants in Chelmsford, Essex

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

4.42 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

10.64 μg/m³

155

255

425

605+

Ozone (O₃)

31.60 ppb

201

201+

Sulfur Dioxide (SO₂)

0.48 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.42 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.31 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Chelmsford, Essex

Get Live Pollen Counts

Chelmsford, Essex

Scroll To Air Quality Map

Track live Chelmsford, Essex air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-26T23:00:00.000Z	29 \| good	4.72 \| good	14.044 \| good	31.466 \| good	0.439 \| good	8.142 \| good	0.297 \| good
2026-09-27T00:00:00.000Z	27 \| good	5.25 \| good	10.514 \| good	28.194 \| good	0.475 \| good	11.917 \| good	0.226 \| good
2026-09-27T01:00:00.000Z	38 \| good	6.847 \| good	12.665 \| good	29.056 \| good	0.631 \| good	12.291 \| good	0.229 \| good
2026-09-27T02:00:00.000Z	33 \| good	5.808 \| good	16.958 \| good	26.192 \| good	0.433 \| good	14.246 \| good	0.212 \| good
2026-09-27T03:00:00.000Z	38 \| good	7.113 \| good	17.922 \| good	20.864 \| good	0.616 \| good	14.056 \| good	0.217 \| good
2026-09-27T04:00:00.000Z	27 \| good	4.855 \| good	24.944 \| good	23.976 \| good	0.442 \| good	11.133 \| good	0.205 \| good
2026-09-27T05:00:00.000Z	33 \| good	5.515 \| good	14.579 \| good	24.754 \| good	0.508 \| good	10.172 \| good	0.022 \| good
2026-09-27T06:00:00.000Z	27 \| good	5.151 \| good	13.13 \| good	23.971 \| good	0.491 \| good	15.287 \| good	0.021 \| good
2026-09-27T07:00:00.000Z	38 \| good	6.589 \| good	13.463 \| good	22.74 \| good	0.556 \| good	15.287 \| good	0.022 \| good
2026-09-27T08:00:00.000Z	33 \| good	6.119 \| good	10.676 \| good	21.554 \| good	0.453 \| good	11.285 \| good	0.022 \| good
2026-09-27T09:00:00.000Z	33 \| good	6.197 \| good	19.44 \| good	21.24 \| good	0.452 \| good	14.441 \| good	0.022 \| good
2026-09-27T10:00:00.000Z	38 \| good	6.565 \| good	12.61 \| good	22.216 \| good	0.478 \| good	10.267 \| good	0.026 \| good
2026-09-27T11:00:00.000Z	44 \| good	7.78 \| good	11.587 \| good	27.229 \| good	0.653 \| good	7.685 \| good	0.021 \| good
2026-09-27T12:00:00.000Z	33 \| good	6.04 \| good	14.53 \| good	25.883 \| good	0.769 \| good	6.406 \| good	0.02 \| good
2026-09-27T13:00:00.000Z	38 \| good	7.266 \| good	13.572 \| good	29.583 \| good	0.507 \| good	6.491 \| good	0.019 \| good
2026-09-27T14:00:00.000Z	38 \| good	6.771 \| good	15.428 \| good	33.712 \| good	0.611 \| good	5.866 \| good	0.019 \| good
2026-09-27T15:00:00.000Z	38 \| good	7.29 \| good	19.44 \| good	32.49 \| good	0.611 \| good	3.975 \| good	0.02 \| good
2026-09-27T16:00:00.000Z	34 \| good	5.624 \| good	15.413 \| good	37.205 \| good	0.563 \| good	3.826 \| good	0.02 \| good
2026-09-27T17:00:00.000Z	44 \| good	7.719 \| good	14.596 \| good	37.477 \| good	0.722 \| good	4.771 \| good	0.02 \| good
2026-09-27T18:00:00.000Z	38 \| good	6.982 \| good	12.686 \| good	38.567 \| good	0.557 \| good	6.946 \| good	0.024 \| good
2026-09-27T19:00:00.000Z	38 \| good	7.409 \| good	13.343 \| good	36.025 \| good	0.492 \| good	7.668 \| good	0.028 \| good
2026-09-27T20:00:00.000Z	38 \| good	7.095 \| good	12.43 \| good	35.266 \| good	0.506 \| good	6.851 \| good	0.032 \| good
2026-09-27T21:00:00.000Z	38 \| good	6.653 \| good	15.393 \| good	37.724 \| good	0.436 \| good	9.326 \| good	0.039 \| good
2026-09-27T22:00:00.000Z	33 \| good	5.772 \| good	13.189 \| good	35.757 \| good	0.437 \| good	10.153 \| good	0.033 \| good
2026-09-27T23:00:00.000Z	38 \| good	7.459 \| good	12.8 \| good	34.047 \| good	0.438 \| good	14.716 \| good	0.036 \| good
2026-09-28T00:00:00.000Z	44 \| good	7.555 \| good	11.734 \| good	33.467 \| good	0.497 \| good	3.851 \| good	0.255 \| good
2026-09-28T01:00:00.000Z	27 \| good	4.951 \| good	13.366 \| good	28.089 \| good	0.576 \| good	4.553 \| good	0.18 \| good
2026-09-28T02:00:00.000Z	38 \| good	7.215 \| good	11.36 \| good	19.343 \| good	0.446 \| good	5.007 \| good	0.226 \| good
2026-09-28T03:00:00.000Z	33 \| good	5.807 \| good	15.014 \| good	29.904 \| good	0.587 \| good	5.279 \| good	0.214 \| good
2026-09-28T04:00:00.000Z	33 \| good	5.561 \| good	15.274 \| good	26.934 \| good	0.582 \| good	5.15 \| good	0.218 \| good
2026-09-28T05:00:00.000Z	33 \| good	5.696 \| good	11.386 \| good	26.161 \| good	0.46 \| good	2.576 \| good	0.197 \| good
2026-09-28T06:00:00.000Z	33 \| good	5.711 \| good	11.14 \| good	25.978 \| good	0.454 \| good	4.622 \| good	0.21 \| good
2026-09-28T07:00:00.000Z	33 \| good	6.477 \| good	11.622 \| good	26.666 \| good	0.606 \| good	6.287 \| good	0.279 \| good
2026-09-28T08:00:00.000Z	27 \| good	5.299 \| good	13.073 \| good	26.346 \| good	0.437 \| good	7.366 \| good	0.264 \| good
2026-09-28T09:00:00.000Z	33 \| good	5.636 \| good	11.092 \| good	21.26 \| good	0.552 \| good	7.898 \| good	0.235 \| good
2026-09-28T10:00:00.000Z	27 \| good	5.222 \| good	11.276 \| good	18.829 \| good	0.483 \| good	8.412 \| good	0.221 \| good
2026-09-28T11:00:00.000Z	33 \| good	5.692 \| good	11.371 \| good	15.604 \| good	0.602 \| good	5.957 \| good	0.212 \| good
2026-09-28T12:00:00.000Z	27 \| good	5.379 \| good	11.103 \| good	19.325 \| good	0.71 \| good	5.357 \| good	0.188 \| good
2026-09-28T13:00:00.000Z	27 \| good	4.757 \| good	10.005 \| good	21.293 \| good	0.558 \| good	4.612 \| good	0.165 \| good
2026-09-28T14:00:00.000Z	27 \| good	5.475 \| good	11.88 \| good	24.245 \| good	0.562 \| good	3.673 \| good	0.162 \| good
2026-09-28T15:00:00.000Z	27 \| good	4.984 \| good	8.583 \| good	24.315 \| good	0.432 \| good	3.591 \| good	0.156 \| good
2026-09-28T16:00:00.000Z	27 \| good	4.328 \| good	7.908 \| good	28.586 \| good	0.581 \| good	4.244 \| good	0.153 \| good
2026-09-28T17:00:00.000Z	26 \| good	4.279 \| good	8.012 \| good	28.213 \| good	0.622 \| good	3.214 \| good	0.169 \| good
2026-09-28T18:00:00.000Z	27 \| good	2.66 \| good	7.94 \| good	28.964 \| good	0.527 \| good	7.905 \| good	0.216 \| good
2026-09-28T19:00:00.000Z	26 \| good	3.17 \| good	7.953 \| good	27.696 \| good	0.483 \| good	10.538 \| good	0.253 \| good
2026-09-28T20:00:00.000Z	26 \| good	4.461 \| good	7.986 \| good	28.143 \| good	0.477 \| good	5.491 \| good	0.324 \| good
2026-09-28T21:00:00.000Z	30 \| good	4.419 \| good	10.641 \| good	31.601 \| good	0.476 \| good	4.417 \| good	0.312 \| good
2026-09-28T22:00:00.000Z	28 \| good	3.965 \| good	7.949 \| good	29.601 \| good	0.502 \| good	7.542 \| good	0.352 \| good
2026-09-28T22:00:00.000Z	30 \| good	4.419 \| good	10.641 \| good	31.601 \| good	0.476 \| good	4.417 \| good	0.312 \| good
2026-09-28T23:00:00.000Z	25 \| good	3.149 \| good	6.472 \| good	27.01 \| good	0.173 \| good	4.118 \| good	0.127 \| good
2026-09-29T00:00:00.000Z	24 \| good	2.936 \| good	5.83 \| good	26.184 \| good	0.155 \| good	4.096 \| good	0.124 \| good
2026-09-29T01:00:00.000Z	24 \| good	2.779 \| good	5.845 \| good	26.394 \| good	0.14 \| good	4.145 \| good	0.122 \| good
2026-09-29T02:00:00.000Z	24 \| good	2.943 \| good	5.563 \| good	26.478 \| good	0.127 \| good	3.652 \| good	0.121 \| good
2026-09-29T03:00:00.000Z	25 \| good	2.979 \| good	4.829 \| good	27.268 \| good	0.11 \| good	2.879 \| good	0.12 \| good
2026-09-29T04:00:00.000Z	26 \| good	2.807 \| good	5.071 \| good	27.768 \| good	0.105 \| good	2.652 \| good	0.121 \| good
2026-09-29T05:00:00.000Z	23 \| good	3.051 \| good	5.407 \| good	24.73 \| good	0.119 \| good	3.568 \| good	0.125 \| good
2026-09-29T06:00:00.000Z	22 \| good	4.196 \| good	7.019 \| good	20.788 \| good	0.166 \| good	5.277 \| good	0.131 \| good
2026-09-29T07:00:00.000Z	27 \| good	4.657 \| good	7.748 \| good	18.984 \| good	0.228 \| good	7.621 \| good	0.153 \| good
2026-09-29T08:00:00.000Z	27 \| good	5.123 \| good	7.978 \| good	23.135 \| good	0.274 \| good	6.384 \| good	0.151 \| good
2026-09-29T09:00:00.000Z	44 \| good	7.975 \| good	10.476 \| good	24.1 \| good	0.271 \| good	5.367 \| good	0.147 \| good
2026-09-29T10:00:00.000Z	49 \| good	8.548 \| good	10.392 \| good	27.164 \| good	0.313 \| good	5.034 \| good	0.146 \| good
2026-09-29T11:00:00.000Z	52 \| moderate	9.655 \| good	13.596 \| good	31.296 \| good	0.416 \| good	4.338 \| good	0.153 \| good
2026-09-29T12:00:00.000Z	56 \| moderate	11.635 \| good	15.429 \| good	33.793 \| good	0.444 \| good	4.27 \| good	0.159 \| good
2026-09-29T13:00:00.000Z	58 \| moderate	13.098 \| fine	16.579 \| good	33.722 \| good	0.51 \| good	4.334 \| good	0.162 \| good
2026-09-29T14:00:00.000Z	60 \| moderate	14.203 \| fine	17.331 \| good	36.359 \| good	0.503 \| good	4.474 \| good	0.162 \| good
2026-09-29T15:00:00.000Z	62 \| moderate	15.349 \| fine	18.003 \| good	36.013 \| good	0.51 \| good	5.517 \| good	0.162 \| good
2026-09-29T16:00:00.000Z	66 \| moderate	16.884 \| fine	20.938 \| good	34.478 \| good	0.484 \| good	6.709 \| good	0.165 \| good
2026-09-29T17:00:00.000Z	66 \| moderate	17.404 \| fine	21.834 \| good	33.304 \| good	0.492 \| good	8.064 \| good	0.175 \| good
2026-09-29T18:00:00.000Z	73 \| moderate	21.004 \| fine	25.007 \| good	34.136 \| good	0.663 \| good	8.697 \| good	0.185 \| good
2026-09-29T19:00:00.000Z	77 \| moderate	22.712 \| fine	25.768 \| good	30.588 \| good	0.752 \| good	9.403 \| good	0.195 \| good
2026-09-29T20:00:00.000Z	71 \| moderate	20.172 \| fine	26.672 \| good	28.723 \| good	0.614 \| good	8.959 \| good	0.188 \| good
2026-09-29T21:00:00.000Z	66 \| moderate	17.023 \| fine	20.151 \| good	27.967 \| good	0.519 \| good	7.712 \| good	0.179 \| good
2026-09-29T22:00:00.000Z	56 \| moderate	11.579 \| good	14.594 \| good	27.231 \| good	0.375 \| good	6.529 \| good	0.161 \| good
2026-09-29T23:00:00.000Z	44 \| good	7.864 \| good	12.326 \| good	28.897 \| good	0.302 \| good	5.795 \| good	0.147 \| good
2026-09-30T00:00:00.000Z	38 \| good	6.787 \| good	11.832 \| good	30.172 \| good	0.254 \| good	5.43 \| good	0.142 \| good
2026-09-30T01:00:00.000Z	38 \| good	6.621 \| good	10.453 \| good	29.954 \| good	0.243 \| good	5.066 \| good	0.138 \| good
2026-09-30T02:00:00.000Z	33 \| good	6.375 \| good	9.803 \| good	29.276 \| good	0.22 \| good	4.452 \| good	0.136 \| good
2026-09-30T03:00:00.000Z	33 \| good	5.515 \| good	9.694 \| good	27.97 \| good	0.21 \| good	4.025 \| good	0.134 \| good
2026-09-30T04:00:00.000Z	27 \| good	5.324 \| good	10.641 \| good	28.035 \| good	0.195 \| good	3.775 \| good	0.131 \| good
2026-09-30T05:00:00.000Z	28 \| good	5.192 \| good	11.542 \| good	29.899 \| good	0.22 \| good	3.711 \| good	0.128 \| good
2026-09-30T06:00:00.000Z	27 \| good	5.305 \| good	10.987 \| good	29.008 \| good	0.277 \| good	4.024 \| good	0.128 \| good
2026-09-30T07:00:00.000Z	33 \| good	5.563 \| good	10.719 \| good	27.802 \| good	0.302 \| good	5.139 \| good	0.132 \| good
2026-09-30T08:00:00.000Z	33 \| good	5.777 \| good	9.723 \| good	27.013 \| good	0.275 \| good	5.62 \| good	0.13 \| good
2026-09-30T09:00:00.000Z	27 \| good	4.94 \| good	7.918 \| good	26.859 \| good	0.217 \| good	4.938 \| good	0.128 \| good
2026-09-30T10:00:00.000Z	27 \| good	4.911 \| good	6.703 \| good	27.979 \| good	0.216 \| good	5.028 \| good	0.129 \| good
2026-09-30T11:00:00.000Z	29 \| good	4.793 \| good	5.482 \| good	30.783 \| good	0.182 \| good	4.235 \| good	0.124 \| good
2026-09-30T12:00:00.000Z	30 \| good	5.025 \| good	5.854 \| good	32.182 \| good	0.156 \| good	3.63 \| good	0.12 \| good
2026-09-30T13:00:00.000Z	30 \| good	4.995 \| good	5.854 \| good	32.393 \| good	0.153 \| good	3.109 \| good	0.116 \| good
2026-09-30T14:00:00.000Z	31 \| good	4.681 \| good	5.867 \| good	33.139 \| good	0.129 \| good	2.697 \| good	0.114 \| good
2026-09-30T15:00:00.000Z	31 \| good	5.051 \| good	6.569 \| good	33.024 \| good	0.122 \| good	2.735 \| good	0.112 \| good
2026-09-30T16:00:00.000Z	28 \| good	5.235 \| good	6.861 \| good	30.26 \| good	0.139 \| good	3.359 \| good	0.112 \| good
2026-09-30T17:00:00.000Z	28 \| good	5.051 \| good	7.482 \| good	29.522 \| good	0.167 \| good	4.81 \| good	0.117 \| good
2026-09-30T18:00:00.000Z	27 \| good	5.363 \| good	8.372 \| good	27.241 \| good	0.215 \| good	5.993 \| good	0.124 \| good
2026-09-30T19:00:00.000Z	33 \| good	5.623 \| good	9.307 \| good	26.207 \| good	0.284 \| good	6.867 \| good	0.125 \| good
2026-09-30T20:00:00.000Z	27 \| good	4.603 \| good	9.663 \| good	22.821 \| good	0.339 \| good	7.77 \| good	0.13 \| good
2026-09-30T21:00:00.000Z	33 \| good	6.235 \| good	10.966 \| good	21.788 \| good	0.379 \| good	8.848 \| good	0.133 \| good
2026-09-30T22:00:00.000Z	44 \| good	8.003 \| good	12.072 \| good	19.345 \| good	0.434 \| good	9.678 \| good	0.133 \| good

Chelmsford

Get reliable air quality data to drive your business

Chelmsford, Essex air quality map: Stay updated on AQI near you

0.31ppm

How accurate is Essex, UK air quality data?

Air quality and pollutant data for Essex, UK are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

Air quality levels in UK

Check live rankings of places in the UK affected by air pollution.

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Frequently asked questions

How often is air quality information updated for Chelmsford, Essex?

The air quality information for Chelmsford, Essex is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Chelmsford, Essex at its worst?

In the past 24 hours, the air quality in Chelmsford, Essex was at its worst at 12:00:00 on 2026-09-28.

When did Chelmsford, Essex experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Chelmsford, Essex was observed at 08:00:00 on 2026-09-28.

What is the AQI in Chelmsford, Essex right now?

As of now, the AQI in Chelmsford, Essex is 30, indicating Good conditions.

What is the most common type of pollution in Chelmsford, Essex?

Chelmsford, Essex air has the highest levels of O3.

What should I do in case of poor air quality in Chelmsford, Essex?

Poor air quality in Chelmsford, Essex means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Chelmsford, Essex at the moment?

PM_2.5 levels in Chelmsford, Essex are currently 4.419 μg/m³.

What is the PM₁₀ level in Chelmsford, Essex at the moment?

The PM₁₀ concentration in Chelmsford, Essex is 10.641 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Chelmsford, Essex at the moment?

The current carbon monoxide (CO) concentration in Chelmsford, Essex is 0.312 ppm.

What is the sulfur dioxide (SO₂) level in Chelmsford, Essex at the moment?

Currently, Chelmsford, Essex has a sulfur dioxide (SO₂) concentration of 0.476 ppb.

What is the ozone (O₃) level in Chelmsford, Essex at the moment?

The current ozone (O₃) level in Chelmsford, Essex at the moment is 31.601 ppm.

What is the nitrogen dioxide (NO₂) level in Chelmsford, Essex at the moment?

Nitrogen dioxide (NO₂) level in Chelmsford, Essex at the moment is 4.417 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-26T23:00:00.000Z	29 \| good	4.72 \| good	14.044 \| good	31.466 \| good	0.439 \| good	8.142 \| good	0.297 \| good
2026-09-27T00:00:00.000Z	27 \| good	5.25 \| good	10.514 \| good	28.194 \| good	0.475 \| good	11.917 \| good	0.226 \| good
2026-09-27T01:00:00.000Z	38 \| good	6.847 \| good	12.665 \| good	29.056 \| good	0.631 \| good	12.291 \| good	0.229 \| good
2026-09-27T02:00:00.000Z	33 \| good	5.808 \| good	16.958 \| good	26.192 \| good	0.433 \| good	14.246 \| good	0.212 \| good
2026-09-27T03:00:00.000Z	38 \| good	7.113 \| good	17.922 \| good	20.864 \| good	0.616 \| good	14.056 \| good	0.217 \| good
2026-09-27T04:00:00.000Z	27 \| good	4.855 \| good	24.944 \| good	23.976 \| good	0.442 \| good	11.133 \| good	0.205 \| good
2026-09-27T05:00:00.000Z	33 \| good	5.515 \| good	14.579 \| good	24.754 \| good	0.508 \| good	10.172 \| good	0.022 \| good
2026-09-27T06:00:00.000Z	27 \| good	5.151 \| good	13.13 \| good	23.971 \| good	0.491 \| good	15.287 \| good	0.021 \| good
2026-09-27T07:00:00.000Z	38 \| good	6.589 \| good	13.463 \| good	22.74 \| good	0.556 \| good	15.287 \| good	0.022 \| good
2026-09-27T08:00:00.000Z	33 \| good	6.119 \| good	10.676 \| good	21.554 \| good	0.453 \| good	11.285 \| good	0.022 \| good
2026-09-27T09:00:00.000Z	33 \| good	6.197 \| good	19.44 \| good	21.24 \| good	0.452 \| good	14.441 \| good	0.022 \| good
2026-09-27T10:00:00.000Z	38 \| good	6.565 \| good	12.61 \| good	22.216 \| good	0.478 \| good	10.267 \| good	0.026 \| good
2026-09-27T11:00:00.000Z	44 \| good	7.78 \| good	11.587 \| good	27.229 \| good	0.653 \| good	7.685 \| good	0.021 \| good
2026-09-27T12:00:00.000Z	33 \| good	6.04 \| good	14.53 \| good	25.883 \| good	0.769 \| good	6.406 \| good	0.02 \| good
2026-09-27T13:00:00.000Z	38 \| good	7.266 \| good	13.572 \| good	29.583 \| good	0.507 \| good	6.491 \| good	0.019 \| good
2026-09-27T14:00:00.000Z	38 \| good	6.771 \| good	15.428 \| good	33.712 \| good	0.611 \| good	5.866 \| good	0.019 \| good
2026-09-27T15:00:00.000Z	38 \| good	7.29 \| good	19.44 \| good	32.49 \| good	0.611 \| good	3.975 \| good	0.02 \| good
2026-09-27T16:00:00.000Z	34 \| good	5.624 \| good	15.413 \| good	37.205 \| good	0.563 \| good	3.826 \| good	0.02 \| good
2026-09-27T17:00:00.000Z	44 \| good	7.719 \| good	14.596 \| good	37.477 \| good	0.722 \| good	4.771 \| good	0.02 \| good
2026-09-27T18:00:00.000Z	38 \| good	6.982 \| good	12.686 \| good	38.567 \| good	0.557 \| good	6.946 \| good	0.024 \| good
2026-09-27T19:00:00.000Z	38 \| good	7.409 \| good	13.343 \| good	36.025 \| good	0.492 \| good	7.668 \| good	0.028 \| good
2026-09-27T20:00:00.000Z	38 \| good	7.095 \| good	12.43 \| good	35.266 \| good	0.506 \| good	6.851 \| good	0.032 \| good
2026-09-27T21:00:00.000Z	38 \| good	6.653 \| good	15.393 \| good	37.724 \| good	0.436 \| good	9.326 \| good	0.039 \| good
2026-09-27T22:00:00.000Z	33 \| good	5.772 \| good	13.189 \| good	35.757 \| good	0.437 \| good	10.153 \| good	0.033 \| good
2026-09-27T23:00:00.000Z	38 \| good	7.459 \| good	12.8 \| good	34.047 \| good	0.438 \| good	14.716 \| good	0.036 \| good
2026-09-28T00:00:00.000Z	44 \| good	7.555 \| good	11.734 \| good	33.467 \| good	0.497 \| good	3.851 \| good	0.255 \| good
2026-09-28T01:00:00.000Z	27 \| good	4.951 \| good	13.366 \| good	28.089 \| good	0.576 \| good	4.553 \| good	0.18 \| good
2026-09-28T02:00:00.000Z	38 \| good	7.215 \| good	11.36 \| good	19.343 \| good	0.446 \| good	5.007 \| good	0.226 \| good
2026-09-28T03:00:00.000Z	33 \| good	5.807 \| good	15.014 \| good	29.904 \| good	0.587 \| good	5.279 \| good	0.214 \| good
2026-09-28T04:00:00.000Z	33 \| good	5.561 \| good	15.274 \| good	26.934 \| good	0.582 \| good	5.15 \| good	0.218 \| good
2026-09-28T05:00:00.000Z	33 \| good	5.696 \| good	11.386 \| good	26.161 \| good	0.46 \| good	2.576 \| good	0.197 \| good
2026-09-28T06:00:00.000Z	33 \| good	5.711 \| good	11.14 \| good	25.978 \| good	0.454 \| good	4.622 \| good	0.21 \| good
2026-09-28T07:00:00.000Z	33 \| good	6.477 \| good	11.622 \| good	26.666 \| good	0.606 \| good	6.287 \| good	0.279 \| good
2026-09-28T08:00:00.000Z	27 \| good	5.299 \| good	13.073 \| good	26.346 \| good	0.437 \| good	7.366 \| good	0.264 \| good
2026-09-28T09:00:00.000Z	33 \| good	5.636 \| good	11.092 \| good	21.26 \| good	0.552 \| good	7.898 \| good	0.235 \| good
2026-09-28T10:00:00.000Z	27 \| good	5.222 \| good	11.276 \| good	18.829 \| good	0.483 \| good	8.412 \| good	0.221 \| good
2026-09-28T11:00:00.000Z	33 \| good	5.692 \| good	11.371 \| good	15.604 \| good	0.602 \| good	5.957 \| good	0.212 \| good
2026-09-28T12:00:00.000Z	27 \| good	5.379 \| good	11.103 \| good	19.325 \| good	0.71 \| good	5.357 \| good	0.188 \| good
2026-09-28T13:00:00.000Z	27 \| good	4.757 \| good	10.005 \| good	21.293 \| good	0.558 \| good	4.612 \| good	0.165 \| good
2026-09-28T14:00:00.000Z	27 \| good	5.475 \| good	11.88 \| good	24.245 \| good	0.562 \| good	3.673 \| good	0.162 \| good
2026-09-28T15:00:00.000Z	27 \| good	4.984 \| good	8.583 \| good	24.315 \| good	0.432 \| good	3.591 \| good	0.156 \| good
2026-09-28T16:00:00.000Z	27 \| good	4.328 \| good	7.908 \| good	28.586 \| good	0.581 \| good	4.244 \| good	0.153 \| good
2026-09-28T17:00:00.000Z	26 \| good	4.279 \| good	8.012 \| good	28.213 \| good	0.622 \| good	3.214 \| good	0.169 \| good
2026-09-28T18:00:00.000Z	27 \| good	2.66 \| good	7.94 \| good	28.964 \| good	0.527 \| good	7.905 \| good	0.216 \| good
2026-09-28T19:00:00.000Z	26 \| good	3.17 \| good	7.953 \| good	27.696 \| good	0.483 \| good	10.538 \| good	0.253 \| good
2026-09-28T20:00:00.000Z	26 \| good	4.461 \| good	7.986 \| good	28.143 \| good	0.477 \| good	5.491 \| good	0.324 \| good
2026-09-28T21:00:00.000Z	30 \| good	4.419 \| good	10.641 \| good	31.601 \| good	0.476 \| good	4.417 \| good	0.312 \| good
2026-09-28T22:00:00.000Z	28 \| good	3.965 \| good	7.949 \| good	29.601 \| good	0.502 \| good	7.542 \| good	0.352 \| good
2026-09-28T22:00:00.000Z	30 \| good	4.419 \| good	10.641 \| good	31.601 \| good	0.476 \| good	4.417 \| good	0.312 \| good
2026-09-28T23:00:00.000Z	25 \| good	3.149 \| good	6.472 \| good	27.01 \| good	0.173 \| good	4.118 \| good	0.127 \| good
2026-09-29T00:00:00.000Z	24 \| good	2.936 \| good	5.83 \| good	26.184 \| good	0.155 \| good	4.096 \| good	0.124 \| good
2026-09-29T01:00:00.000Z	24 \| good	2.779 \| good	5.845 \| good	26.394 \| good	0.14 \| good	4.145 \| good	0.122 \| good
2026-09-29T02:00:00.000Z	24 \| good	2.943 \| good	5.563 \| good	26.478 \| good	0.127 \| good	3.652 \| good	0.121 \| good
2026-09-29T03:00:00.000Z	25 \| good	2.979 \| good	4.829 \| good	27.268 \| good	0.11 \| good	2.879 \| good	0.12 \| good
2026-09-29T04:00:00.000Z	26 \| good	2.807 \| good	5.071 \| good	27.768 \| good	0.105 \| good	2.652 \| good	0.121 \| good
2026-09-29T05:00:00.000Z	23 \| good	3.051 \| good	5.407 \| good	24.73 \| good	0.119 \| good	3.568 \| good	0.125 \| good
2026-09-29T06:00:00.000Z	22 \| good	4.196 \| good	7.019 \| good	20.788 \| good	0.166 \| good	5.277 \| good	0.131 \| good
2026-09-29T07:00:00.000Z	27 \| good	4.657 \| good	7.748 \| good	18.984 \| good	0.228 \| good	7.621 \| good	0.153 \| good
2026-09-29T08:00:00.000Z	27 \| good	5.123 \| good	7.978 \| good	23.135 \| good	0.274 \| good	6.384 \| good	0.151 \| good
2026-09-29T09:00:00.000Z	44 \| good	7.975 \| good	10.476 \| good	24.1 \| good	0.271 \| good	5.367 \| good	0.147 \| good
2026-09-29T10:00:00.000Z	49 \| good	8.548 \| good	10.392 \| good	27.164 \| good	0.313 \| good	5.034 \| good	0.146 \| good
2026-09-29T11:00:00.000Z	52 \| moderate	9.655 \| good	13.596 \| good	31.296 \| good	0.416 \| good	4.338 \| good	0.153 \| good
2026-09-29T12:00:00.000Z	56 \| moderate	11.635 \| good	15.429 \| good	33.793 \| good	0.444 \| good	4.27 \| good	0.159 \| good
2026-09-29T13:00:00.000Z	58 \| moderate	13.098 \| fine	16.579 \| good	33.722 \| good	0.51 \| good	4.334 \| good	0.162 \| good
2026-09-29T14:00:00.000Z	60 \| moderate	14.203 \| fine	17.331 \| good	36.359 \| good	0.503 \| good	4.474 \| good	0.162 \| good
2026-09-29T15:00:00.000Z	62 \| moderate	15.349 \| fine	18.003 \| good	36.013 \| good	0.51 \| good	5.517 \| good	0.162 \| good
2026-09-29T16:00:00.000Z	66 \| moderate	16.884 \| fine	20.938 \| good	34.478 \| good	0.484 \| good	6.709 \| good	0.165 \| good
2026-09-29T17:00:00.000Z	66 \| moderate	17.404 \| fine	21.834 \| good	33.304 \| good	0.492 \| good	8.064 \| good	0.175 \| good
2026-09-29T18:00:00.000Z	73 \| moderate	21.004 \| fine	25.007 \| good	34.136 \| good	0.663 \| good	8.697 \| good	0.185 \| good
2026-09-29T19:00:00.000Z	77 \| moderate	22.712 \| fine	25.768 \| good	30.588 \| good	0.752 \| good	9.403 \| good	0.195 \| good
2026-09-29T20:00:00.000Z	71 \| moderate	20.172 \| fine	26.672 \| good	28.723 \| good	0.614 \| good	8.959 \| good	0.188 \| good
2026-09-29T21:00:00.000Z	66 \| moderate	17.023 \| fine	20.151 \| good	27.967 \| good	0.519 \| good	7.712 \| good	0.179 \| good
2026-09-29T22:00:00.000Z	56 \| moderate	11.579 \| good	14.594 \| good	27.231 \| good	0.375 \| good	6.529 \| good	0.161 \| good
2026-09-29T23:00:00.000Z	44 \| good	7.864 \| good	12.326 \| good	28.897 \| good	0.302 \| good	5.795 \| good	0.147 \| good
2026-09-30T00:00:00.000Z	38 \| good	6.787 \| good	11.832 \| good	30.172 \| good	0.254 \| good	5.43 \| good	0.142 \| good
2026-09-30T01:00:00.000Z	38 \| good	6.621 \| good	10.453 \| good	29.954 \| good	0.243 \| good	5.066 \| good	0.138 \| good
2026-09-30T02:00:00.000Z	33 \| good	6.375 \| good	9.803 \| good	29.276 \| good	0.22 \| good	4.452 \| good	0.136 \| good
2026-09-30T03:00:00.000Z	33 \| good	5.515 \| good	9.694 \| good	27.97 \| good	0.21 \| good	4.025 \| good	0.134 \| good
2026-09-30T04:00:00.000Z	27 \| good	5.324 \| good	10.641 \| good	28.035 \| good	0.195 \| good	3.775 \| good	0.131 \| good
2026-09-30T05:00:00.000Z	28 \| good	5.192 \| good	11.542 \| good	29.899 \| good	0.22 \| good	3.711 \| good	0.128 \| good
2026-09-30T06:00:00.000Z	27 \| good	5.305 \| good	10.987 \| good	29.008 \| good	0.277 \| good	4.024 \| good	0.128 \| good
2026-09-30T07:00:00.000Z	33 \| good	5.563 \| good	10.719 \| good	27.802 \| good	0.302 \| good	5.139 \| good	0.132 \| good
2026-09-30T08:00:00.000Z	33 \| good	5.777 \| good	9.723 \| good	27.013 \| good	0.275 \| good	5.62 \| good	0.13 \| good
2026-09-30T09:00:00.000Z	27 \| good	4.94 \| good	7.918 \| good	26.859 \| good	0.217 \| good	4.938 \| good	0.128 \| good
2026-09-30T10:00:00.000Z	27 \| good	4.911 \| good	6.703 \| good	27.979 \| good	0.216 \| good	5.028 \| good	0.129 \| good
2026-09-30T11:00:00.000Z	29 \| good	4.793 \| good	5.482 \| good	30.783 \| good	0.182 \| good	4.235 \| good	0.124 \| good
2026-09-30T12:00:00.000Z	30 \| good	5.025 \| good	5.854 \| good	32.182 \| good	0.156 \| good	3.63 \| good	0.12 \| good
2026-09-30T13:00:00.000Z	30 \| good	4.995 \| good	5.854 \| good	32.393 \| good	0.153 \| good	3.109 \| good	0.116 \| good
2026-09-30T14:00:00.000Z	31 \| good	4.681 \| good	5.867 \| good	33.139 \| good	0.129 \| good	2.697 \| good	0.114 \| good
2026-09-30T15:00:00.000Z	31 \| good	5.051 \| good	6.569 \| good	33.024 \| good	0.122 \| good	2.735 \| good	0.112 \| good
2026-09-30T16:00:00.000Z	28 \| good	5.235 \| good	6.861 \| good	30.26 \| good	0.139 \| good	3.359 \| good	0.112 \| good
2026-09-30T17:00:00.000Z	28 \| good	5.051 \| good	7.482 \| good	29.522 \| good	0.167 \| good	4.81 \| good	0.117 \| good
2026-09-30T18:00:00.000Z	27 \| good	5.363 \| good	8.372 \| good	27.241 \| good	0.215 \| good	5.993 \| good	0.124 \| good
2026-09-30T19:00:00.000Z	33 \| good	5.623 \| good	9.307 \| good	26.207 \| good	0.284 \| good	6.867 \| good	0.125 \| good
2026-09-30T20:00:00.000Z	27 \| good	4.603 \| good	9.663 \| good	22.821 \| good	0.339 \| good	7.77 \| good	0.13 \| good
2026-09-30T21:00:00.000Z	33 \| good	6.235 \| good	10.966 \| good	21.788 \| good	0.379 \| good	8.848 \| good	0.133 \| good
2026-09-30T22:00:00.000Z	44 \| good	8.003 \| good	12.072 \| good	19.345 \| good	0.434 \| good	9.678 \| good	0.133 \| good

Live air quality index in Chelmsford, Essex today

Major air pollutants in Chelmsford, Essex

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Chelmsford, Essex air quality forecast and history

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Chelmsford, Essex air quality map: Stay updated on AQI near you

Air quality in nearby cities

Billericay, Essex

Witham, Essex

Maldon, Essex

South Woodham Ferrers, Essex

Wickford, Essex

Brentwood, Essex

How accurate is Essex, UK air quality data?

Air quality levels in UK

Frequently asked questions

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What is the PM2.5 level in Chelmsford, Essex at the moment?

What is the PM10 level in Chelmsford, Essex at the moment?

What is the carbon monoxide (CO) level in Chelmsford, Essex at the moment?

What is the sulfur dioxide (SO2) level in Chelmsford, Essex at the moment?

What is the ozone (O3) level in Chelmsford, Essex at the moment?

What is the nitrogen dioxide (NO2) level in Chelmsford, Essex at the moment?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in Chelmsford, Essex at the moment?

What is the PM₁₀ level in Chelmsford, Essex at the moment?

What is the sulfur dioxide (SO₂) level in Chelmsford, Essex at the moment?

What is the ozone (O₃) level in Chelmsford, Essex at the moment?

What is the nitrogen dioxide (NO₂) level in Chelmsford, Essex at the moment?