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

The PM10 concentration in Chelmsford, Essex is 16.841 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 0.988 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 49.066 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 11.962 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 6.402 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)

6.40 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

16.84 μg/m³

155

255

425

605+

Ozone (O₃)

49.07 ppb

201

201+

Sulfur Dioxide (SO₂)

0.99 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.96 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.03 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2026-08-10T21:00:00.000Z	27 \| good	4.051 \| good	9.378 \| good	29.486 \| good	0.116 \| good	1.937 \| good	0.109 \| good
2026-08-10T22:00:00.000Z	26 \| good	3.991 \| good	9.474 \| good	28.059 \| good	0.122 \| good	2.125 \| good	0.11 \| good
2026-08-10T23:00:00.000Z	25 \| good	3.839 \| good	8.393 \| good	27.161 \| good	0.108 \| good	2.268 \| good	0.11 \| good
2026-08-11T00:00:00.000Z	23 \| good	3.819 \| good	7.442 \| good	25.452 \| good	0.099 \| good	2.121 \| good	0.11 \| good
2026-08-11T01:00:00.000Z	22 \| good	3.809 \| good	6.918 \| good	23.524 \| good	0.094 \| good	2.011 \| good	0.109 \| good
2026-08-11T02:00:00.000Z	22 \| good	3.73 \| good	6.724 \| good	22.415 \| good	0.089 \| good	2.045 \| good	0.11 \| good
2026-08-11T03:00:00.000Z	22 \| good	3.607 \| good	6.321 \| good	21.568 \| good	0.085 \| good	2.035 \| good	0.111 \| good
2026-08-11T04:00:00.000Z	22 \| good	3.514 \| good	6.028 \| good	20.806 \| good	0.083 \| good	2.127 \| good	0.112 \| good
2026-08-11T05:00:00.000Z	22 \| good	3.616 \| good	6.199 \| good	20.43 \| good	0.088 \| good	2.465 \| good	0.112 \| good
2026-08-11T06:00:00.000Z	22 \| good	3.573 \| good	6.529 \| good	20.471 \| good	0.116 \| good	3.184 \| good	0.111 \| good
2026-08-11T07:00:00.000Z	27 \| good	4.611 \| good	12.591 \| good	18.589 \| good	0.553 \| good	7.291 \| good	0.025 \| good
2026-08-11T08:00:00.000Z	27 \| good	4.701 \| good	12.65 \| good	21.407 \| good	0.677 \| good	7.104 \| good	0.023 \| good
2026-08-11T09:00:00.000Z	27 \| good	4.844 \| good	13.788 \| good	25.913 \| good	0.714 \| good	4.495 \| good	0.023 \| good
2026-08-11T10:00:00.000Z	27 \| good	5.101 \| good	14.797 \| good	21.049 \| good	0.488 \| good	2.479 \| good	0.021 \| good
2026-08-11T11:00:00.000Z	54 \| moderate	11.479 \| good	19.816 \| good	21.486 \| good	0.486 \| good	2.984 \| good	0.023 \| good
2026-08-11T12:00:00.000Z	27 \| good	4.674 \| good	16.1 \| good	19.659 \| good	0.658 \| good	3.544 \| good	0.021 \| good
2026-08-11T13:00:00.000Z	27 \| good	4.801 \| good	21.552 \| good	25.317 \| good	0.655 \| good	4.536 \| good	0.021 \| good
2026-08-11T14:00:00.000Z	29 \| good	4.656 \| good	21.749 \| good	30.516 \| good	0.472 \| good	4.175 \| good	0.021 \| good
2026-08-11T15:00:00.000Z	31 \| good	4.377 \| good	17.384 \| good	33.504 \| good	0.471 \| good	4.006 \| good	0.021 \| good
2026-08-11T16:00:00.000Z	29 \| good	4.383 \| good	21.508 \| good	30.795 \| good	0.602 \| good	3.669 \| good	0.021 \| good
2026-08-11T17:00:00.000Z	27 \| good	4.814 \| good	21.497 \| good	23.979 \| good	0.487 \| good	3.753 \| good	0.028 \| good
2026-08-11T18:00:00.000Z	54 \| moderate	11.17 \| good	13.173 \| good	25.878 \| good	0.585 \| good	3.778 \| good	0.024 \| good
2026-08-11T19:00:00.000Z	32 \| good	4.62 \| good	19.207 \| good	35.253 \| good	0.585 \| good	6.861 \| good	0.023 \| good
2026-08-11T20:00:00.000Z	56 \| moderate	11.609 \| good	17.12 \| good	40.391 \| good	0.587 \| good	4.637 \| good	0.029 \| good
2026-08-11T21:00:00.000Z	56 \| moderate	11.646 \| good	13.918 \| good	35.371 \| good	0.567 \| good	6.678 \| good	0.028 \| good
2026-08-11T22:00:00.000Z	30 \| good	4.349 \| good	22.325 \| good	32.452 \| good	0.479 \| good	5.03 \| good	0.022 \| good
2026-08-11T23:00:00.000Z	31 \| good	4.727 \| good	11.338 \| good	33.829 \| good	0.55 \| good	6.577 \| good	0.022 \| good
2026-08-12T00:00:00.000Z	35 \| good	5.71 \| good	16.27 \| good	38.498 \| good	0.606 \| good	5.848 \| good	0.179 \| good
2026-08-12T01:00:00.000Z	36 \| good	6.209 \| good	14.028 \| good	39.329 \| good	0.481 \| good	3.743 \| good	0.176 \| good
2026-08-12T02:00:00.000Z	38 \| good	5.123 \| good	15.856 \| good	40.676 \| good	0.382 \| good	3.614 \| good	0.174 \| good
2026-08-12T03:00:00.000Z	34 \| good	5.619 \| good	15.247 \| good	36.944 \| good	0.527 \| good	3.845 \| good	0.159 \| good
2026-08-12T04:00:00.000Z	33 \| good	5.642 \| good	14.723 \| good	33.09 \| good	0.47 \| good	4.737 \| good	0.184 \| good
2026-08-12T05:00:00.000Z	30 \| good	5.097 \| good	16.583 \| good	31.686 \| good	0.49 \| good	4.808 \| good	0.023 \| good
2026-08-12T06:00:00.000Z	29 \| good	5.151 \| good	15.649 \| good	30.622 \| good	0.544 \| good	5.265 \| good	0.024 \| good
2026-08-12T07:00:00.000Z	33 \| good	6.365 \| good	16.638 \| good	30.68 \| good	0.872 \| good	7.837 \| good	0.025 \| good
2026-08-12T08:00:00.000Z	38 \| good	6.604 \| good	16.281 \| good	28.052 \| good	0.896 \| good	8.336 \| good	0.024 \| good
2026-08-12T09:00:00.000Z	33 \| good	6.406 \| good	21.107 \| good	24.947 \| good	1.126 \| good	6.59 \| good	0.022 \| good
2026-08-12T10:00:00.000Z	38 \| good	6.723 \| good	20.34 \| good	26.383 \| good	1.181 \| good	7.082 \| good	0.02 \| good
2026-08-12T11:00:00.000Z	38 \| good	6.941 \| good	15.695 \| good	29.737 \| good	1.274 \| good	5.92 \| good	0.02 \| good
2026-08-12T12:00:00.000Z	44 \| good	7.672 \| good	21.026 \| good	32.122 \| good	0.957 \| good	5.455 \| good	0.022 \| good
2026-08-12T13:00:00.000Z	38 \| good	6.675 \| good	19.609 \| good	32.87 \| good	1.304 \| good	6.31 \| good	0.019 \| good
2026-08-12T14:00:00.000Z	34 \| good	5.89 \| good	18.604 \| good	37.205 \| good	1.25 \| good	4.61 \| good	0.021 \| good
2026-08-12T15:00:00.000Z	39 \| good	6.161 \| good	20.689 \| good	42.484 \| good	1.075 \| good	5.892 \| good	0.02 \| good
2026-08-12T16:00:00.000Z	44 \| good	6.83 \| good	23.419 \| good	48.339 \| good	1.055 \| good	11.471 \| good	0.022 \| good
2026-08-12T17:00:00.000Z	45 \| good	5.57 \| good	16.913 \| good	48.807 \| good	1.137 \| good	9.878 \| good	0.024 \| good
2026-08-12T18:00:00.000Z	44 \| good	6.292 \| good	15.888 \| good	47.834 \| good	1.457 \| good	5.975 \| good	0.024 \| good
2026-08-12T19:00:00.000Z	45 \| good	6.402 \| good	16.841 \| good	49.066 \| good	0.988 \| good	11.962 \| good	0.025 \| good
2026-08-12T20:00:00.000Z	44 \| good	7.388 \| good	26.545 \| good	47.676 \| good	0.656 \| good	7.547 \| good	0.024 \| good
2026-08-12T20:00:00.000Z	45 \| good	6.402 \| good	16.841 \| good	49.066 \| good	0.988 \| good	11.962 \| good	0.025 \| good
2026-08-12T21:00:00.000Z	52 \| moderate	9.68 \| good	16.962 \| good	39.874 \| good	0.477 \| good	7.615 \| good	0.143 \| good
2026-08-12T22:00:00.000Z	56 \| moderate	12.423 \| fine	17.628 \| good	37.231 \| good	0.417 \| good	8.384 \| good	0.145 \| good
2026-08-12T23:00:00.000Z	64 \| moderate	16.035 \| fine	20.356 \| good	34.886 \| good	0.368 \| good	6.717 \| good	0.148 \| good
2026-08-13T00:00:00.000Z	66 \| moderate	17.088 \| fine	23.811 \| good	31.147 \| good	0.351 \| good	7.256 \| good	0.147 \| good
2026-08-13T01:00:00.000Z	67 \| moderate	18.179 \| fine	25.315 \| good	27.113 \| good	0.344 \| good	6.717 \| good	0.145 \| good
2026-08-13T02:00:00.000Z	75 \| moderate	21.8 \| fine	28.986 \| good	23.835 \| good	0.355 \| good	7.108 \| good	0.146 \| good
2026-08-13T03:00:00.000Z	75 \| moderate	21.91 \| fine	30.451 \| good	23.23 \| good	0.38 \| good	6.976 \| good	0.148 \| good
2026-08-13T04:00:00.000Z	73 \| moderate	21.488 \| fine	32.413 \| good	23.304 \| good	0.374 \| good	6.857 \| good	0.15 \| good
2026-08-13T05:00:00.000Z	69 \| moderate	18.632 \| fine	26.737 \| good	20.676 \| good	0.368 \| good	8.02 \| good	0.154 \| good
2026-08-13T06:00:00.000Z	67 \| moderate	17.741 \| fine	20.561 \| good	22.216 \| good	0.415 \| good	8.592 \| good	0.159 \| good
2026-08-13T07:00:00.000Z	64 \| moderate	16.142 \| fine	19.91 \| good	24.193 \| good	0.578 \| good	8.844 \| good	0.166 \| good
2026-08-13T08:00:00.000Z	56 \| moderate	11.817 \| good	20.658 \| good	27.981 \| good	0.657 \| good	7.641 \| good	0.168 \| good
2026-08-13T09:00:00.000Z	52 \| moderate	10.029 \| good	17.019 \| good	38.311 \| good	0.77 \| good	6.756 \| good	0.165 \| good
2026-08-13T10:00:00.000Z	49 \| good	8.75 \| good	12.995 \| good	46.939 \| good	0.759 \| good	5.209 \| good	0.155 \| good
2026-08-13T11:00:00.000Z	64 \| moderate	7.203 \| good	11.126 \| good	58.908 \| fine	0.612 \| good	2.917 \| good	0.146 \| good
2026-08-13T12:00:00.000Z	87 \| moderate	6.576 \| good	10.772 \| good	65.691 \| fine	0.485 \| good	2.135 \| good	0.139 \| good
2026-08-13T13:00:00.000Z	93 \| moderate	6.742 \| good	10.811 \| good	68.053 \| fine	0.46 \| good	1.974 \| good	0.138 \| good
2026-08-13T14:00:00.000Z	100 \| moderate	7.017 \| good	10.71 \| good	70.174 \| fine	0.459 \| good	2.041 \| good	0.138 \| good
2026-08-13T15:00:00.000Z	101 \| sensitive	7.671 \| good	11.02 \| good	71.331 \| moderate	0.43 \| good	2.264 \| good	0.138 \| good
2026-08-13T16:00:00.000Z	101 \| sensitive	8.123 \| good	11.58 \| good	71.284 \| moderate	0.444 \| good	2.548 \| good	0.143 \| good
2026-08-13T17:00:00.000Z	97 \| moderate	8.074 \| good	11.947 \| good	68.572 \| fine	0.48 \| good	3.462 \| good	0.144 \| good
2026-08-13T18:00:00.000Z	87 \| moderate	8.321 \| good	11.854 \| good	65.783 \| fine	0.378 \| good	4.41 \| good	0.149 \| good
2026-08-13T19:00:00.000Z	64 \| moderate	8.483 \| good	12.951 \| good	59.271 \| fine	0.485 \| good	5.624 \| good	0.149 \| good
2026-08-13T20:00:00.000Z	64 \| moderate	9.153 \| good	14.277 \| good	58.753 \| fine	0.536 \| good	6.092 \| good	0.155 \| good
2026-08-13T21:00:00.000Z	49 \| good	9.439 \| good	14.282 \| good	51.704 \| good	0.586 \| good	8.059 \| good	0.16 \| good
2026-08-13T22:00:00.000Z	52 \| moderate	10.347 \| good	15.115 \| good	45.896 \| good	0.625 \| good	9.08 \| good	0.165 \| good
2026-08-13T23:00:00.000Z	54 \| moderate	11.154 \| good	17.387 \| good	38.463 \| good	0.652 \| good	10.494 \| good	0.171 \| good
2026-08-14T00:00:00.000Z	56 \| moderate	11.877 \| good	18.398 \| good	31.137 \| good	0.622 \| good	11.962 \| good	0.173 \| good
2026-08-14T01:00:00.000Z	58 \| moderate	12.565 \| fine	18.567 \| good	26.856 \| good	0.595 \| good	13.491 \| good	0.173 \| good
2026-08-14T02:00:00.000Z	54 \| moderate	11.419 \| good	17.415 \| good	25.569 \| good	0.575 \| good	11.5 \| good	0.167 \| good
2026-08-14T03:00:00.000Z	52 \| moderate	10.282 \| good	15.553 \| good	23.23 \| good	0.544 \| good	10.759 \| good	0.158 \| good
2026-08-14T04:00:00.000Z	49 \| good	9.374 \| good	14.456 \| good	21.783 \| good	0.574 \| good	10.089 \| good	0.154 \| good
2026-08-14T05:00:00.000Z	49 \| good	9.052 \| good	14.539 \| good	21.034 \| good	0.617 \| good	11.825 \| good	0.161 \| good
2026-08-14T06:00:00.000Z	52 \| moderate	9.543 \| good	15.182 \| good	20.85 \| good	0.711 \| good	13.125 \| good	0.166 \| good
2026-08-14T07:00:00.000Z	52 \| moderate	10.355 \| good	17.007 \| good	26.411 \| good	0.811 \| good	10.763 \| good	0.178 \| good
2026-08-14T08:00:00.000Z	56 \| moderate	12.283 \| fine	19.284 \| good	39.305 \| good	0.738 \| good	8.587 \| good	0.179 \| good
2026-08-14T09:00:00.000Z	56 \| moderate	12.411 \| fine	20.115 \| good	44.057 \| good	0.577 \| good	6.099 \| good	0.177 \| good
2026-08-14T10:00:00.000Z	56 \| moderate	11.504 \| good	20.141 \| good	52.514 \| good	0.439 \| good	3.336 \| good	0.167 \| good
2026-08-14T11:00:00.000Z	71 \| moderate	10.875 \| good	19.075 \| good	60.957 \| fine	0.331 \| good	2.17 \| good	0.153 \| good
2026-08-14T12:00:00.000Z	80 \| moderate	10.163 \| good	17.159 \| good	63.729 \| fine	0.277 \| good	1.631 \| good	0.147 \| good
2026-08-14T13:00:00.000Z	84 \| moderate	9.523 \| good	15.931 \| good	64.965 \| fine	0.231 \| good	1.423 \| good	0.141 \| good
2026-08-14T14:00:00.000Z	87 \| moderate	8.874 \| good	14.943 \| good	65.762 \| fine	0.197 \| good	1.233 \| good	0.138 \| good
2026-08-14T15:00:00.000Z	90 \| moderate	8.238 \| good	13.743 \| good	66.555 \| fine	0.175 \| good	1.341 \| good	0.133 \| good
2026-08-14T16:00:00.000Z	84 \| moderate	7.884 \| good	13.062 \| good	64.983 \| fine	0.16 \| good	1.416 \| good	0.127 \| good
2026-08-14T17:00:00.000Z	67 \| moderate	7.014 \| good	11.784 \| good	59.823 \| fine	0.139 \| good	1.577 \| good	0.118 \| good
2026-08-14T18:00:00.000Z	48 \| good	6.146 \| good	9.875 \| good	51.76 \| good	0.133 \| good	2.062 \| good	0.112 \| good
2026-08-14T19:00:00.000Z	41 \| good	5.755 \| good	8.896 \| good	44.092 \| good	0.14 \| good	2.518 \| good	0.111 \| good
2026-08-14T20:00:00.000Z	33 \| good	4.731 \| good	6.083 \| good	35.953 \| good	0.149 \| good	3.48 \| good	0.11 \| good

Chelmsford

Get reliable air quality data to drive your business

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

0.02ppm

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

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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 09:00:00 on 2026-08-11.

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 06:00:00 on 2026-08-12.

What is the AQI in Chelmsford, Essex right now?

As of now, the AQI in Chelmsford, Essex is 45, 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 6.402 μg/m³.

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

The PM₁₀ concentration in Chelmsford, Essex is 16.841 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 0.025 ppm.

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

Currently, Chelmsford, Essex has a sulfur dioxide (SO₂) concentration of 0.988 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 49.066 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 11.962 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-10T21:00:00.000Z	27 \| good	4.051 \| good	9.378 \| good	29.486 \| good	0.116 \| good	1.937 \| good	0.109 \| good
2026-08-10T22:00:00.000Z	26 \| good	3.991 \| good	9.474 \| good	28.059 \| good	0.122 \| good	2.125 \| good	0.11 \| good
2026-08-10T23:00:00.000Z	25 \| good	3.839 \| good	8.393 \| good	27.161 \| good	0.108 \| good	2.268 \| good	0.11 \| good
2026-08-11T00:00:00.000Z	23 \| good	3.819 \| good	7.442 \| good	25.452 \| good	0.099 \| good	2.121 \| good	0.11 \| good
2026-08-11T01:00:00.000Z	22 \| good	3.809 \| good	6.918 \| good	23.524 \| good	0.094 \| good	2.011 \| good	0.109 \| good
2026-08-11T02:00:00.000Z	22 \| good	3.73 \| good	6.724 \| good	22.415 \| good	0.089 \| good	2.045 \| good	0.11 \| good
2026-08-11T03:00:00.000Z	22 \| good	3.607 \| good	6.321 \| good	21.568 \| good	0.085 \| good	2.035 \| good	0.111 \| good
2026-08-11T04:00:00.000Z	22 \| good	3.514 \| good	6.028 \| good	20.806 \| good	0.083 \| good	2.127 \| good	0.112 \| good
2026-08-11T05:00:00.000Z	22 \| good	3.616 \| good	6.199 \| good	20.43 \| good	0.088 \| good	2.465 \| good	0.112 \| good
2026-08-11T06:00:00.000Z	22 \| good	3.573 \| good	6.529 \| good	20.471 \| good	0.116 \| good	3.184 \| good	0.111 \| good
2026-08-11T07:00:00.000Z	27 \| good	4.611 \| good	12.591 \| good	18.589 \| good	0.553 \| good	7.291 \| good	0.025 \| good
2026-08-11T08:00:00.000Z	27 \| good	4.701 \| good	12.65 \| good	21.407 \| good	0.677 \| good	7.104 \| good	0.023 \| good
2026-08-11T09:00:00.000Z	27 \| good	4.844 \| good	13.788 \| good	25.913 \| good	0.714 \| good	4.495 \| good	0.023 \| good
2026-08-11T10:00:00.000Z	27 \| good	5.101 \| good	14.797 \| good	21.049 \| good	0.488 \| good	2.479 \| good	0.021 \| good
2026-08-11T11:00:00.000Z	54 \| moderate	11.479 \| good	19.816 \| good	21.486 \| good	0.486 \| good	2.984 \| good	0.023 \| good
2026-08-11T12:00:00.000Z	27 \| good	4.674 \| good	16.1 \| good	19.659 \| good	0.658 \| good	3.544 \| good	0.021 \| good
2026-08-11T13:00:00.000Z	27 \| good	4.801 \| good	21.552 \| good	25.317 \| good	0.655 \| good	4.536 \| good	0.021 \| good
2026-08-11T14:00:00.000Z	29 \| good	4.656 \| good	21.749 \| good	30.516 \| good	0.472 \| good	4.175 \| good	0.021 \| good
2026-08-11T15:00:00.000Z	31 \| good	4.377 \| good	17.384 \| good	33.504 \| good	0.471 \| good	4.006 \| good	0.021 \| good
2026-08-11T16:00:00.000Z	29 \| good	4.383 \| good	21.508 \| good	30.795 \| good	0.602 \| good	3.669 \| good	0.021 \| good
2026-08-11T17:00:00.000Z	27 \| good	4.814 \| good	21.497 \| good	23.979 \| good	0.487 \| good	3.753 \| good	0.028 \| good
2026-08-11T18:00:00.000Z	54 \| moderate	11.17 \| good	13.173 \| good	25.878 \| good	0.585 \| good	3.778 \| good	0.024 \| good
2026-08-11T19:00:00.000Z	32 \| good	4.62 \| good	19.207 \| good	35.253 \| good	0.585 \| good	6.861 \| good	0.023 \| good
2026-08-11T20:00:00.000Z	56 \| moderate	11.609 \| good	17.12 \| good	40.391 \| good	0.587 \| good	4.637 \| good	0.029 \| good
2026-08-11T21:00:00.000Z	56 \| moderate	11.646 \| good	13.918 \| good	35.371 \| good	0.567 \| good	6.678 \| good	0.028 \| good
2026-08-11T22:00:00.000Z	30 \| good	4.349 \| good	22.325 \| good	32.452 \| good	0.479 \| good	5.03 \| good	0.022 \| good
2026-08-11T23:00:00.000Z	31 \| good	4.727 \| good	11.338 \| good	33.829 \| good	0.55 \| good	6.577 \| good	0.022 \| good
2026-08-12T00:00:00.000Z	35 \| good	5.71 \| good	16.27 \| good	38.498 \| good	0.606 \| good	5.848 \| good	0.179 \| good
2026-08-12T01:00:00.000Z	36 \| good	6.209 \| good	14.028 \| good	39.329 \| good	0.481 \| good	3.743 \| good	0.176 \| good
2026-08-12T02:00:00.000Z	38 \| good	5.123 \| good	15.856 \| good	40.676 \| good	0.382 \| good	3.614 \| good	0.174 \| good
2026-08-12T03:00:00.000Z	34 \| good	5.619 \| good	15.247 \| good	36.944 \| good	0.527 \| good	3.845 \| good	0.159 \| good
2026-08-12T04:00:00.000Z	33 \| good	5.642 \| good	14.723 \| good	33.09 \| good	0.47 \| good	4.737 \| good	0.184 \| good
2026-08-12T05:00:00.000Z	30 \| good	5.097 \| good	16.583 \| good	31.686 \| good	0.49 \| good	4.808 \| good	0.023 \| good
2026-08-12T06:00:00.000Z	29 \| good	5.151 \| good	15.649 \| good	30.622 \| good	0.544 \| good	5.265 \| good	0.024 \| good
2026-08-12T07:00:00.000Z	33 \| good	6.365 \| good	16.638 \| good	30.68 \| good	0.872 \| good	7.837 \| good	0.025 \| good
2026-08-12T08:00:00.000Z	38 \| good	6.604 \| good	16.281 \| good	28.052 \| good	0.896 \| good	8.336 \| good	0.024 \| good
2026-08-12T09:00:00.000Z	33 \| good	6.406 \| good	21.107 \| good	24.947 \| good	1.126 \| good	6.59 \| good	0.022 \| good
2026-08-12T10:00:00.000Z	38 \| good	6.723 \| good	20.34 \| good	26.383 \| good	1.181 \| good	7.082 \| good	0.02 \| good
2026-08-12T11:00:00.000Z	38 \| good	6.941 \| good	15.695 \| good	29.737 \| good	1.274 \| good	5.92 \| good	0.02 \| good
2026-08-12T12:00:00.000Z	44 \| good	7.672 \| good	21.026 \| good	32.122 \| good	0.957 \| good	5.455 \| good	0.022 \| good
2026-08-12T13:00:00.000Z	38 \| good	6.675 \| good	19.609 \| good	32.87 \| good	1.304 \| good	6.31 \| good	0.019 \| good
2026-08-12T14:00:00.000Z	34 \| good	5.89 \| good	18.604 \| good	37.205 \| good	1.25 \| good	4.61 \| good	0.021 \| good
2026-08-12T15:00:00.000Z	39 \| good	6.161 \| good	20.689 \| good	42.484 \| good	1.075 \| good	5.892 \| good	0.02 \| good
2026-08-12T16:00:00.000Z	44 \| good	6.83 \| good	23.419 \| good	48.339 \| good	1.055 \| good	11.471 \| good	0.022 \| good
2026-08-12T17:00:00.000Z	45 \| good	5.57 \| good	16.913 \| good	48.807 \| good	1.137 \| good	9.878 \| good	0.024 \| good
2026-08-12T18:00:00.000Z	44 \| good	6.292 \| good	15.888 \| good	47.834 \| good	1.457 \| good	5.975 \| good	0.024 \| good
2026-08-12T19:00:00.000Z	45 \| good	6.402 \| good	16.841 \| good	49.066 \| good	0.988 \| good	11.962 \| good	0.025 \| good
2026-08-12T20:00:00.000Z	44 \| good	7.388 \| good	26.545 \| good	47.676 \| good	0.656 \| good	7.547 \| good	0.024 \| good
2026-08-12T20:00:00.000Z	45 \| good	6.402 \| good	16.841 \| good	49.066 \| good	0.988 \| good	11.962 \| good	0.025 \| good
2026-08-12T21:00:00.000Z	52 \| moderate	9.68 \| good	16.962 \| good	39.874 \| good	0.477 \| good	7.615 \| good	0.143 \| good
2026-08-12T22:00:00.000Z	56 \| moderate	12.423 \| fine	17.628 \| good	37.231 \| good	0.417 \| good	8.384 \| good	0.145 \| good
2026-08-12T23:00:00.000Z	64 \| moderate	16.035 \| fine	20.356 \| good	34.886 \| good	0.368 \| good	6.717 \| good	0.148 \| good
2026-08-13T00:00:00.000Z	66 \| moderate	17.088 \| fine	23.811 \| good	31.147 \| good	0.351 \| good	7.256 \| good	0.147 \| good
2026-08-13T01:00:00.000Z	67 \| moderate	18.179 \| fine	25.315 \| good	27.113 \| good	0.344 \| good	6.717 \| good	0.145 \| good
2026-08-13T02:00:00.000Z	75 \| moderate	21.8 \| fine	28.986 \| good	23.835 \| good	0.355 \| good	7.108 \| good	0.146 \| good
2026-08-13T03:00:00.000Z	75 \| moderate	21.91 \| fine	30.451 \| good	23.23 \| good	0.38 \| good	6.976 \| good	0.148 \| good
2026-08-13T04:00:00.000Z	73 \| moderate	21.488 \| fine	32.413 \| good	23.304 \| good	0.374 \| good	6.857 \| good	0.15 \| good
2026-08-13T05:00:00.000Z	69 \| moderate	18.632 \| fine	26.737 \| good	20.676 \| good	0.368 \| good	8.02 \| good	0.154 \| good
2026-08-13T06:00:00.000Z	67 \| moderate	17.741 \| fine	20.561 \| good	22.216 \| good	0.415 \| good	8.592 \| good	0.159 \| good
2026-08-13T07:00:00.000Z	64 \| moderate	16.142 \| fine	19.91 \| good	24.193 \| good	0.578 \| good	8.844 \| good	0.166 \| good
2026-08-13T08:00:00.000Z	56 \| moderate	11.817 \| good	20.658 \| good	27.981 \| good	0.657 \| good	7.641 \| good	0.168 \| good
2026-08-13T09:00:00.000Z	52 \| moderate	10.029 \| good	17.019 \| good	38.311 \| good	0.77 \| good	6.756 \| good	0.165 \| good
2026-08-13T10:00:00.000Z	49 \| good	8.75 \| good	12.995 \| good	46.939 \| good	0.759 \| good	5.209 \| good	0.155 \| good
2026-08-13T11:00:00.000Z	64 \| moderate	7.203 \| good	11.126 \| good	58.908 \| fine	0.612 \| good	2.917 \| good	0.146 \| good
2026-08-13T12:00:00.000Z	87 \| moderate	6.576 \| good	10.772 \| good	65.691 \| fine	0.485 \| good	2.135 \| good	0.139 \| good
2026-08-13T13:00:00.000Z	93 \| moderate	6.742 \| good	10.811 \| good	68.053 \| fine	0.46 \| good	1.974 \| good	0.138 \| good
2026-08-13T14:00:00.000Z	100 \| moderate	7.017 \| good	10.71 \| good	70.174 \| fine	0.459 \| good	2.041 \| good	0.138 \| good
2026-08-13T15:00:00.000Z	101 \| sensitive	7.671 \| good	11.02 \| good	71.331 \| moderate	0.43 \| good	2.264 \| good	0.138 \| good
2026-08-13T16:00:00.000Z	101 \| sensitive	8.123 \| good	11.58 \| good	71.284 \| moderate	0.444 \| good	2.548 \| good	0.143 \| good
2026-08-13T17:00:00.000Z	97 \| moderate	8.074 \| good	11.947 \| good	68.572 \| fine	0.48 \| good	3.462 \| good	0.144 \| good
2026-08-13T18:00:00.000Z	87 \| moderate	8.321 \| good	11.854 \| good	65.783 \| fine	0.378 \| good	4.41 \| good	0.149 \| good
2026-08-13T19:00:00.000Z	64 \| moderate	8.483 \| good	12.951 \| good	59.271 \| fine	0.485 \| good	5.624 \| good	0.149 \| good
2026-08-13T20:00:00.000Z	64 \| moderate	9.153 \| good	14.277 \| good	58.753 \| fine	0.536 \| good	6.092 \| good	0.155 \| good
2026-08-13T21:00:00.000Z	49 \| good	9.439 \| good	14.282 \| good	51.704 \| good	0.586 \| good	8.059 \| good	0.16 \| good
2026-08-13T22:00:00.000Z	52 \| moderate	10.347 \| good	15.115 \| good	45.896 \| good	0.625 \| good	9.08 \| good	0.165 \| good
2026-08-13T23:00:00.000Z	54 \| moderate	11.154 \| good	17.387 \| good	38.463 \| good	0.652 \| good	10.494 \| good	0.171 \| good
2026-08-14T00:00:00.000Z	56 \| moderate	11.877 \| good	18.398 \| good	31.137 \| good	0.622 \| good	11.962 \| good	0.173 \| good
2026-08-14T01:00:00.000Z	58 \| moderate	12.565 \| fine	18.567 \| good	26.856 \| good	0.595 \| good	13.491 \| good	0.173 \| good
2026-08-14T02:00:00.000Z	54 \| moderate	11.419 \| good	17.415 \| good	25.569 \| good	0.575 \| good	11.5 \| good	0.167 \| good
2026-08-14T03:00:00.000Z	52 \| moderate	10.282 \| good	15.553 \| good	23.23 \| good	0.544 \| good	10.759 \| good	0.158 \| good
2026-08-14T04:00:00.000Z	49 \| good	9.374 \| good	14.456 \| good	21.783 \| good	0.574 \| good	10.089 \| good	0.154 \| good
2026-08-14T05:00:00.000Z	49 \| good	9.052 \| good	14.539 \| good	21.034 \| good	0.617 \| good	11.825 \| good	0.161 \| good
2026-08-14T06:00:00.000Z	52 \| moderate	9.543 \| good	15.182 \| good	20.85 \| good	0.711 \| good	13.125 \| good	0.166 \| good
2026-08-14T07:00:00.000Z	52 \| moderate	10.355 \| good	17.007 \| good	26.411 \| good	0.811 \| good	10.763 \| good	0.178 \| good
2026-08-14T08:00:00.000Z	56 \| moderate	12.283 \| fine	19.284 \| good	39.305 \| good	0.738 \| good	8.587 \| good	0.179 \| good
2026-08-14T09:00:00.000Z	56 \| moderate	12.411 \| fine	20.115 \| good	44.057 \| good	0.577 \| good	6.099 \| good	0.177 \| good
2026-08-14T10:00:00.000Z	56 \| moderate	11.504 \| good	20.141 \| good	52.514 \| good	0.439 \| good	3.336 \| good	0.167 \| good
2026-08-14T11:00:00.000Z	71 \| moderate	10.875 \| good	19.075 \| good	60.957 \| fine	0.331 \| good	2.17 \| good	0.153 \| good
2026-08-14T12:00:00.000Z	80 \| moderate	10.163 \| good	17.159 \| good	63.729 \| fine	0.277 \| good	1.631 \| good	0.147 \| good
2026-08-14T13:00:00.000Z	84 \| moderate	9.523 \| good	15.931 \| good	64.965 \| fine	0.231 \| good	1.423 \| good	0.141 \| good
2026-08-14T14:00:00.000Z	87 \| moderate	8.874 \| good	14.943 \| good	65.762 \| fine	0.197 \| good	1.233 \| good	0.138 \| good
2026-08-14T15:00:00.000Z	90 \| moderate	8.238 \| good	13.743 \| good	66.555 \| fine	0.175 \| good	1.341 \| good	0.133 \| good
2026-08-14T16:00:00.000Z	84 \| moderate	7.884 \| good	13.062 \| good	64.983 \| fine	0.16 \| good	1.416 \| good	0.127 \| good
2026-08-14T17:00:00.000Z	67 \| moderate	7.014 \| good	11.784 \| good	59.823 \| fine	0.139 \| good	1.577 \| good	0.118 \| good
2026-08-14T18:00:00.000Z	48 \| good	6.146 \| good	9.875 \| good	51.76 \| good	0.133 \| good	2.062 \| good	0.112 \| good
2026-08-14T19:00:00.000Z	41 \| good	5.755 \| good	8.896 \| good	44.092 \| good	0.14 \| good	2.518 \| good	0.111 \| good
2026-08-14T20:00:00.000Z	33 \| good	4.731 \| good	6.083 \| good	35.953 \| good	0.149 \| good	3.48 \| good	0.11 \| 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

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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?