What is the current concentration of PM10 in Hemel Hempstead, Hertfordshire?

The current PM10 concentration at Hemel Hempstead, Hertfordshire is 13.2 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Hemel Hempstead, Hertfordshire?

The current sulfur dioxide (SO2) concentration at Hemel Hempstead, Hertfordshire is 0.589 ppb.

What is the current concentration of ozone (O3) in Hemel Hempstead, Hertfordshire?

The current ozone (O3) concentration at Hemel Hempstead, Hertfordshire is 27.319 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Hemel Hempstead, Hertfordshire?

The current nitrogen dioxide (NO2) concentration at Hemel Hempstead, Hertfordshire is 7.457 ppb.

Hemel Hempstead, Hertfordshire live air quality index now

Q: What is the current concentration of PM2.5 in Hemel Hempstead, Hertfordshire?

The current PM2.5 concentration at Hemel Hempstead, Hertfordshire is 4.851 μg/m3.

Stay updated with real-time air quality in Hemel Hempstead, Hertfordshire 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

Hemel Hempstead, Hertfordshire

Last updated: ... (Local time)

Major air pollutants in Hemel Hempstead, Hertfordshire

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

4.85 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

13.20 μg/m³

155

255

425

605+

Ozone (O₃)

27.32 ppb

201

201+

Sulfur Dioxide (SO₂)

0.59 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

7.46 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.31 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Hemel Hempstead, Hertfordshire

Get Live Pollen Counts

Hemel Hempstead, Hertfordshire

Scroll To Air Quality Map

Track live Hemel Hempstead, Hertfordshire air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-26T23:00:00.000Z	19 \| good	3.448 \| good	16.57 \| good	20.361 \| good	0.635 \| good	9.372 \| good	0.297 \| good
2026-09-27T00:00:00.000Z	35 \| good	5.981 \| good	38.007 \| good	24.402 \| good	0.668 \| good	18.159 \| good	0.226 \| good
2026-09-27T01:00:00.000Z	44 \| good	8.085 \| good	18.177 \| good	24.386 \| good	0.717 \| good	19.434 \| good	0.229 \| good
2026-09-27T02:00:00.000Z	38 \| good	7.38 \| good	18.854 \| good	16.281 \| good	0.592 \| good	18.385 \| good	0.212 \| good
2026-09-27T03:00:00.000Z	38 \| good	7.014 \| good	17.344 \| good	12.495 \| good	0.67 \| good	20.177 \| good	0.217 \| good
2026-09-27T04:00:00.000Z	56 \| moderate	11.815 \| good	16 \| good	11.421 \| good	0.592 \| good	15.306 \| good	0.205 \| good
2026-09-27T05:00:00.000Z	44 \| good	8.079 \| good	26.812 \| good	21.72 \| good	0.666 \| good	14.476 \| good	0.009 \| good
2026-09-27T06:00:00.000Z	44 \| good	7.82 \| good	16.249 \| good	15.659 \| good	0.6 \| good	13.818 \| good	0.009 \| good
2026-09-27T07:00:00.000Z	49 \| good	9.32 \| good	23.007 \| good	24.364 \| good	0.599 \| good	12.814 \| good	0.009 \| good
2026-09-27T08:00:00.000Z	44 \| good	7.82 \| good	26.4 \| good	24.864 \| good	0.597 \| good	10.884 \| good	0.009 \| good
2026-09-27T09:00:00.000Z	52 \| moderate	9.96 \| good	22.011 \| good	20.921 \| good	0.528 \| good	13.734 \| good	0.009 \| good
2026-09-27T10:00:00.000Z	44 \| good	8.075 \| good	29.347 \| good	14.594 \| good	0.53 \| good	14.213 \| good	0.011 \| good
2026-09-27T11:00:00.000Z	44 \| good	8.412 \| good	27.2 \| good	17.601 \| good	0.666 \| good	9.182 \| good	0.009 \| good
2026-09-27T12:00:00.000Z	38 \| good	7.086 \| good	20.972 \| good	18.398 \| good	0.735 \| good	7.361 \| good	0.008 \| good
2026-09-27T13:00:00.000Z	44 \| good	7.689 \| good	28.671 \| good	21.397 \| good	0.735 \| good	9.762 \| good	0.008 \| good
2026-09-27T14:00:00.000Z	38 \| good	7.378 \| good	23.398 \| good	27.868 \| good	0.735 \| good	7.972 \| good	0.008 \| good
2026-09-27T15:00:00.000Z	54 \| moderate	10.738 \| good	22.805 \| good	23.721 \| good	0.735 \| good	8.696 \| good	0.008 \| good
2026-09-27T16:00:00.000Z	44 \| good	8.193 \| good	19.293 \| good	29.489 \| good	0.666 \| good	5.291 \| good	0.008 \| good
2026-09-27T17:00:00.000Z	44 \| good	7.879 \| good	23.676 \| good	34.631 \| good	0.735 \| good	6.973 \| good	0.008 \| good
2026-09-27T18:00:00.000Z	38 \| good	7.198 \| good	23.933 \| good	31.737 \| good	0.667 \| good	6.365 \| good	0.01 \| good
2026-09-27T19:00:00.000Z	44 \| good	7.516 \| good	28.015 \| good	35.787 \| good	0.666 \| good	8.358 \| good	0.011 \| good
2026-09-27T20:00:00.000Z	44 \| good	8.352 \| good	20.712 \| good	30.933 \| good	0.597 \| good	6.787 \| good	0.013 \| good
2026-09-27T21:00:00.000Z	44 \| good	7.549 \| good	22.916 \| good	34.064 \| good	0.599 \| good	9.222 \| good	0.016 \| good
2026-09-27T22:00:00.000Z	38 \| good	7.201 \| good	20.95 \| good	32.149 \| good	0.51 \| good	8.467 \| good	0.013 \| good
2026-09-27T23:00:00.000Z	38 \| good	6.739 \| good	21.368 \| good	33.791 \| good	0.598 \| good	8.319 \| good	0.015 \| good
2026-09-28T00:00:00.000Z	33 \| good	6.31 \| good	22.076 \| good	32.334 \| good	0.68 \| good	4.315 \| good	0.255 \| good
2026-09-28T01:00:00.000Z	33 \| good	6.216 \| good	22.38 \| good	29.642 \| good	0.723 \| good	4.519 \| good	0.18 \| good
2026-09-28T02:00:00.000Z	38 \| good	6.929 \| good	24.478 \| good	27.068 \| good	0.591 \| good	4.201 \| good	0.226 \| good
2026-09-28T03:00:00.000Z	33 \| good	6.144 \| good	16.378 \| good	26.881 \| good	0.724 \| good	5.232 \| good	0.214 \| good
2026-09-28T04:00:00.000Z	38 \| good	6.865 \| good	21.107 \| good	26.033 \| good	0.723 \| good	5.445 \| good	0.217 \| good
2026-09-28T05:00:00.000Z	33 \| good	6.337 \| good	13.22 \| good	23.937 \| good	0.598 \| good	6.415 \| good	0.197 \| good
2026-09-28T06:00:00.000Z	33 \| good	5.638 \| good	18.775 \| good	23.133 \| good	0.598 \| good	5.883 \| good	0.21 \| good
2026-09-28T07:00:00.000Z	27 \| good	5.383 \| good	10.629 \| good	12.864 \| good	0.597 \| good	6.892 \| good	0.279 \| good
2026-09-28T08:00:00.000Z	33 \| good	5.83 \| good	12.089 \| good	24.903 \| good	0.595 \| good	9.258 \| good	0.264 \| good
2026-09-28T09:00:00.000Z	33 \| good	5.551 \| good	19.587 \| good	13.627 \| good	0.668 \| good	19.234 \| good	0.235 \| good
2026-09-28T10:00:00.000Z	22 \| good	4.423 \| good	11.677 \| good	18.338 \| good	0.667 \| good	20.628 \| good	0.221 \| good
2026-09-28T11:00:00.000Z	27 \| good	4.9 \| good	12.08 \| good	23.728 \| good	0.734 \| good	8.189 \| good	0.212 \| good
2026-09-28T12:00:00.000Z	27 \| good	4.657 \| good	14 \| good	18.138 \| good	0.736 \| good	14.811 \| good	0.188 \| good
2026-09-28T13:00:00.000Z	27 \| good	4.908 \| good	13.8 \| good	22.684 \| good	0.582 \| good	14.546 \| good	0.165 \| good
2026-09-28T14:00:00.000Z	27 \| good	4.734 \| good	12.656 \| good	20.31 \| good	0.51 \| good	11.027 \| good	0.162 \| good
2026-09-28T15:00:00.000Z	27 \| good	4.694 \| good	14.795 \| good	22.982 \| good	0.594 \| good	12.883 \| good	0.156 \| good
2026-09-28T16:00:00.000Z	22 \| good	4.273 \| good	14.2 \| good	24.341 \| good	0.726 \| good	12.332 \| good	0.153 \| good
2026-09-28T17:00:00.000Z	25 \| good	3.865 \| good	14.474 \| good	27.432 \| good	0.88 \| good	9.713 \| good	0.169 \| good
2026-09-28T18:00:00.000Z	29 \| good	4.032 \| good	12.858 \| good	30.609 \| good	0.741 \| good	9.194 \| good	0.216 \| good
2026-09-28T19:00:00.000Z	26 \| good	3.724 \| good	10.714 \| good	28.102 \| good	0.664 \| good	5.238 \| good	0.253 \| good
2026-09-28T20:00:00.000Z	28 \| good	3.874 \| good	11.658 \| good	29.789 \| good	0.585 \| good	4.915 \| good	0.324 \| good
2026-09-28T21:00:00.000Z	27 \| good	4.851 \| good	13.2 \| good	27.319 \| good	0.589 \| good	7.457 \| good	0.312 \| good
2026-09-28T22:00:00.000Z	30 \| good	4.879 \| good	16.583 \| good	32.365 \| good	0.591 \| good	7.775 \| good	0.352 \| good
2026-09-28T22:00:00.000Z	27 \| good	4.851 \| good	13.2 \| good	27.319 \| good	0.589 \| good	7.457 \| good	0.312 \| good
2026-09-28T23:00:00.000Z	27 \| good	4.548 \| good	8.737 \| good	20.284 \| good	0.299 \| good	6.665 \| good	0.146 \| good
2026-09-29T00:00:00.000Z	27 \| good	5.061 \| good	8.187 \| good	24.434 \| good	0.235 \| good	5.526 \| good	0.135 \| good
2026-09-29T01:00:00.000Z	23 \| good	4.117 \| good	7.743 \| good	24.923 \| good	0.201 \| good	4.075 \| good	0.128 \| good
2026-09-29T02:00:00.000Z	24 \| good	3.928 \| good	7.439 \| good	25.895 \| good	0.183 \| good	3.781 \| good	0.124 \| good
2026-09-29T03:00:00.000Z	24 \| good	4.004 \| good	7.206 \| good	26.366 \| good	0.175 \| good	3.299 \| good	0.122 \| good
2026-09-29T04:00:00.000Z	24 \| good	3.91 \| good	6.918 \| good	26.431 \| good	0.172 \| good	3.38 \| good	0.121 \| good
2026-09-29T05:00:00.000Z	27 \| good	4.501 \| good	7.302 \| good	26.7 \| good	0.171 \| good	3.617 \| good	0.12 \| good
2026-09-29T06:00:00.000Z	23 \| good	4.314 \| good	7.443 \| good	25.136 \| good	0.205 \| good	4.966 \| good	0.123 \| good
2026-09-29T07:00:00.000Z	27 \| good	5.019 \| good	7.673 \| good	22.444 \| good	0.281 \| good	6.92 \| good	0.137 \| good
2026-09-29T08:00:00.000Z	27 \| good	5.287 \| good	7.499 \| good	20.539 \| good	0.338 \| good	8.271 \| good	0.141 \| good
2026-09-29T09:00:00.000Z	27 \| good	5.465 \| good	8.316 \| good	24.167 \| good	0.363 \| good	7.624 \| good	0.148 \| good
2026-09-29T10:00:00.000Z	38 \| good	7.179 \| good	10.025 \| good	26.521 \| good	0.393 \| good	5.994 \| good	0.155 \| good
2026-09-29T11:00:00.000Z	44 \| good	8.245 \| good	11.239 \| good	30.698 \| good	0.461 \| good	5.306 \| good	0.158 \| good
2026-09-29T12:00:00.000Z	44 \| good	8.499 \| good	11.937 \| good	32.885 \| good	0.488 \| good	5.183 \| good	0.157 \| good
2026-09-29T13:00:00.000Z	49 \| good	9.491 \| good	12.482 \| good	36.95 \| good	0.498 \| good	4.634 \| good	0.16 \| good
2026-09-29T14:00:00.000Z	49 \| good	9.471 \| good	13.17 \| good	39.562 \| good	0.5 \| good	4.404 \| good	0.159 \| good
2026-09-29T15:00:00.000Z	44 \| good	8.299 \| good	12.507 \| good	40.372 \| good	0.461 \| good	4.767 \| good	0.158 \| good
2026-09-29T16:00:00.000Z	44 \| good	7.928 \| good	12.665 \| good	39.96 \| good	0.403 \| good	5.685 \| good	0.158 \| good
2026-09-29T17:00:00.000Z	44 \| good	8.241 \| good	12.957 \| good	38.315 \| good	0.417 \| good	7.983 \| good	0.162 \| good
2026-09-29T18:00:00.000Z	52 \| moderate	10.374 \| good	15.851 \| good	32.983 \| good	0.488 \| good	10.843 \| good	0.178 \| good
2026-09-29T19:00:00.000Z	52 \| moderate	10.062 \| good	17.853 \| good	28.963 \| good	0.608 \| good	12.532 \| good	0.184 \| good
2026-09-29T20:00:00.000Z	54 \| moderate	11.405 \| good	18.515 \| good	28.719 \| good	0.68 \| good	11.142 \| good	0.181 \| good
2026-09-29T21:00:00.000Z	58 \| moderate	13.355 \| fine	18.57 \| good	25.868 \| good	0.56 \| good	10.677 \| good	0.17 \| good
2026-09-29T22:00:00.000Z	54 \| moderate	10.82 \| good	15.725 \| good	26.009 \| good	0.423 \| good	8.166 \| good	0.159 \| good
2026-09-29T23:00:00.000Z	49 \| good	8.609 \| good	12.317 \| good	31.589 \| good	0.398 \| good	7.125 \| good	0.146 \| good
2026-09-30T00:00:00.000Z	33 \| good	6.406 \| good	10.31 \| good	32.911 \| good	0.331 \| good	5.544 \| good	0.144 \| good
2026-09-30T01:00:00.000Z	30 \| good	5.26 \| good	9.215 \| good	32.323 \| good	0.296 \| good	4.184 \| good	0.133 \| good
2026-09-30T02:00:00.000Z	30 \| good	4.321 \| good	8.848 \| good	32.365 \| good	0.329 \| good	2.984 \| good	0.128 \| good
2026-09-30T03:00:00.000Z	31 \| good	4.413 \| good	8.947 \| good	32.837 \| good	0.321 \| good	2.62 \| good	0.126 \| good
2026-09-30T04:00:00.000Z	31 \| good	4.576 \| good	10.34 \| good	32.518 \| good	0.291 \| good	2.852 \| good	0.124 \| good
2026-09-30T05:00:00.000Z	30 \| good	4.812 \| good	11.449 \| good	32.423 \| good	0.231 \| good	3.112 \| good	0.126 \| good
2026-09-30T06:00:00.000Z	33 \| good	5.511 \| good	11.708 \| good	32.262 \| good	0.21 \| good	4.045 \| good	0.128 \| good
2026-09-30T07:00:00.000Z	33 \| good	6.172 \| good	10.44 \| good	30.759 \| good	0.241 \| good	5.752 \| good	0.131 \| good
2026-09-30T08:00:00.000Z	27 \| good	5.023 \| good	7.998 \| good	28.038 \| good	0.249 \| good	6.932 \| good	0.134 \| good
2026-09-30T09:00:00.000Z	27 \| good	4.64 \| good	6.857 \| good	27.056 \| good	0.222 \| good	6.881 \| good	0.136 \| good
2026-09-30T10:00:00.000Z	33 \| good	5.501 \| good	6.778 \| good	29.675 \| good	0.158 \| good	5.641 \| good	0.127 \| good
2026-09-30T11:00:00.000Z	30 \| good	5.078 \| good	6.107 \| good	31.582 \| good	0.149 \| good	3.049 \| good	0.116 \| good
2026-09-30T12:00:00.000Z	30 \| good	4.448 \| good	6.568 \| good	32.376 \| good	0.122 \| good	2.435 \| good	0.11 \| good
2026-09-30T13:00:00.000Z	32 \| good	4.563 \| good	7.263 \| good	35.103 \| good	0.119 \| good	1.935 \| good	0.11 \| good
2026-09-30T14:00:00.000Z	33 \| good	3.991 \| good	7.519 \| good	36.137 \| good	0.137 \| good	1.899 \| good	0.111 \| good
2026-09-30T15:00:00.000Z	33 \| good	4.085 \| good	8.276 \| good	35.688 \| good	0.155 \| good	2.41 \| good	0.111 \| good
2026-09-30T16:00:00.000Z	31 \| good	4.514 \| good	8.561 \| good	34.459 \| good	0.187 \| good	3.327 \| good	0.115 \| good
2026-09-30T17:00:00.000Z	30 \| good	4.65 \| good	9.135 \| good	31.66 \| good	0.225 \| good	5.063 \| good	0.124 \| good
2026-09-30T18:00:00.000Z	27 \| good	5.287 \| good	11.35 \| good	27.239 \| good	0.307 \| good	7.032 \| good	0.132 \| good
2026-09-30T19:00:00.000Z	33 \| good	6.06 \| good	12.178 \| good	23.404 \| good	0.34 \| good	7.92 \| good	0.133 \| good
2026-09-30T20:00:00.000Z	38 \| good	6.577 \| good	13.282 \| good	22.194 \| good	0.389 \| good	8.662 \| good	0.136 \| good
2026-09-30T21:00:00.000Z	38 \| good	7.095 \| good	14.885 \| good	21.005 \| good	0.449 \| good	8.973 \| good	0.141 \| good
2026-09-30T22:00:00.000Z	44 \| good	7.751 \| good	15.653 \| good	21.203 \| good	0.47 \| good	8.776 \| good	0.143 \| good

Hemel Hempstead

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Hemel Hempstead, Hertfordshire air quality map: Track AQI near you

0.31ppm

How accurate is Hertfordshire, UK air quality data?

Air quality data and pollutant measurements for Hertfordshire, UK adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for Hemel Hempstead, Hertfordshire updated?

The air quality for Hemel Hempstead, Hertfordshire is updated every hour.

When was the worst air quality at Hemel Hempstead, Hertfordshire in the last 24 hrs?

The worst air quality in Hemel Hempstead, Hertfordshire in the last 24 hours was observed at 04:00:00 on 2026-09-28.

When was the best air quality at Hemel Hempstead, Hertfordshire in the last 24 hrs?

In the last 24 hrs, the best air quality in Hemel Hempstead, Hertfordshire was observed at 04:00:00 on 2026-09-28.

What is the current air quality in Hemel Hempstead, Hertfordshire?

The current air quality in Hemel Hempstead, Hertfordshire is 27, categorized as Good based on real-time data.

What pollutant is the most common in Hemel Hempstead, Hertfordshire?

The most common pollutant in Hemel Hempstead, Hertfordshire is PM2.5.

What should I do if the air quality in Hemel Hempstead, Hertfordshire is poor?

If the air quality in Hemel Hempstead, Hertfordshire is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Hemel Hempstead, Hertfordshire?

The current PM_2.5 concentration at Hemel Hempstead, Hertfordshire is 4.851 μg/m³.

What is the current concentration of PM₁₀ in Hemel Hempstead, Hertfordshire?

The current PM₁₀ concentration at Hemel Hempstead, Hertfordshire is 13.2 μg/m³.

What is the current concentration of carbon monoxide (CO) in Hemel Hempstead, Hertfordshire?

The current carbon monoxide (CO) concentration at Hemel Hempstead, Hertfordshire is 0.312 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Hemel Hempstead, Hertfordshire?

The current sulfur dioxide (SO₂) concentration at Hemel Hempstead, Hertfordshire is 0.589 ppb.

What is the current concentration of ozone (O₃) in Hemel Hempstead, Hertfordshire?

The current ozone (O₃) concentration at Hemel Hempstead, Hertfordshire is 27.319 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Hemel Hempstead, Hertfordshire?

The current nitrogen dioxide (NO₂) concentration at Hemel Hempstead, Hertfordshire is 7.457 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-26T23:00:00.000Z	19 \| good	3.448 \| good	16.57 \| good	20.361 \| good	0.635 \| good	9.372 \| good	0.297 \| good
2026-09-27T00:00:00.000Z	35 \| good	5.981 \| good	38.007 \| good	24.402 \| good	0.668 \| good	18.159 \| good	0.226 \| good
2026-09-27T01:00:00.000Z	44 \| good	8.085 \| good	18.177 \| good	24.386 \| good	0.717 \| good	19.434 \| good	0.229 \| good
2026-09-27T02:00:00.000Z	38 \| good	7.38 \| good	18.854 \| good	16.281 \| good	0.592 \| good	18.385 \| good	0.212 \| good
2026-09-27T03:00:00.000Z	38 \| good	7.014 \| good	17.344 \| good	12.495 \| good	0.67 \| good	20.177 \| good	0.217 \| good
2026-09-27T04:00:00.000Z	56 \| moderate	11.815 \| good	16 \| good	11.421 \| good	0.592 \| good	15.306 \| good	0.205 \| good
2026-09-27T05:00:00.000Z	44 \| good	8.079 \| good	26.812 \| good	21.72 \| good	0.666 \| good	14.476 \| good	0.009 \| good
2026-09-27T06:00:00.000Z	44 \| good	7.82 \| good	16.249 \| good	15.659 \| good	0.6 \| good	13.818 \| good	0.009 \| good
2026-09-27T07:00:00.000Z	49 \| good	9.32 \| good	23.007 \| good	24.364 \| good	0.599 \| good	12.814 \| good	0.009 \| good
2026-09-27T08:00:00.000Z	44 \| good	7.82 \| good	26.4 \| good	24.864 \| good	0.597 \| good	10.884 \| good	0.009 \| good
2026-09-27T09:00:00.000Z	52 \| moderate	9.96 \| good	22.011 \| good	20.921 \| good	0.528 \| good	13.734 \| good	0.009 \| good
2026-09-27T10:00:00.000Z	44 \| good	8.075 \| good	29.347 \| good	14.594 \| good	0.53 \| good	14.213 \| good	0.011 \| good
2026-09-27T11:00:00.000Z	44 \| good	8.412 \| good	27.2 \| good	17.601 \| good	0.666 \| good	9.182 \| good	0.009 \| good
2026-09-27T12:00:00.000Z	38 \| good	7.086 \| good	20.972 \| good	18.398 \| good	0.735 \| good	7.361 \| good	0.008 \| good
2026-09-27T13:00:00.000Z	44 \| good	7.689 \| good	28.671 \| good	21.397 \| good	0.735 \| good	9.762 \| good	0.008 \| good
2026-09-27T14:00:00.000Z	38 \| good	7.378 \| good	23.398 \| good	27.868 \| good	0.735 \| good	7.972 \| good	0.008 \| good
2026-09-27T15:00:00.000Z	54 \| moderate	10.738 \| good	22.805 \| good	23.721 \| good	0.735 \| good	8.696 \| good	0.008 \| good
2026-09-27T16:00:00.000Z	44 \| good	8.193 \| good	19.293 \| good	29.489 \| good	0.666 \| good	5.291 \| good	0.008 \| good
2026-09-27T17:00:00.000Z	44 \| good	7.879 \| good	23.676 \| good	34.631 \| good	0.735 \| good	6.973 \| good	0.008 \| good
2026-09-27T18:00:00.000Z	38 \| good	7.198 \| good	23.933 \| good	31.737 \| good	0.667 \| good	6.365 \| good	0.01 \| good
2026-09-27T19:00:00.000Z	44 \| good	7.516 \| good	28.015 \| good	35.787 \| good	0.666 \| good	8.358 \| good	0.011 \| good
2026-09-27T20:00:00.000Z	44 \| good	8.352 \| good	20.712 \| good	30.933 \| good	0.597 \| good	6.787 \| good	0.013 \| good
2026-09-27T21:00:00.000Z	44 \| good	7.549 \| good	22.916 \| good	34.064 \| good	0.599 \| good	9.222 \| good	0.016 \| good
2026-09-27T22:00:00.000Z	38 \| good	7.201 \| good	20.95 \| good	32.149 \| good	0.51 \| good	8.467 \| good	0.013 \| good
2026-09-27T23:00:00.000Z	38 \| good	6.739 \| good	21.368 \| good	33.791 \| good	0.598 \| good	8.319 \| good	0.015 \| good
2026-09-28T00:00:00.000Z	33 \| good	6.31 \| good	22.076 \| good	32.334 \| good	0.68 \| good	4.315 \| good	0.255 \| good
2026-09-28T01:00:00.000Z	33 \| good	6.216 \| good	22.38 \| good	29.642 \| good	0.723 \| good	4.519 \| good	0.18 \| good
2026-09-28T02:00:00.000Z	38 \| good	6.929 \| good	24.478 \| good	27.068 \| good	0.591 \| good	4.201 \| good	0.226 \| good
2026-09-28T03:00:00.000Z	33 \| good	6.144 \| good	16.378 \| good	26.881 \| good	0.724 \| good	5.232 \| good	0.214 \| good
2026-09-28T04:00:00.000Z	38 \| good	6.865 \| good	21.107 \| good	26.033 \| good	0.723 \| good	5.445 \| good	0.217 \| good
2026-09-28T05:00:00.000Z	33 \| good	6.337 \| good	13.22 \| good	23.937 \| good	0.598 \| good	6.415 \| good	0.197 \| good
2026-09-28T06:00:00.000Z	33 \| good	5.638 \| good	18.775 \| good	23.133 \| good	0.598 \| good	5.883 \| good	0.21 \| good
2026-09-28T07:00:00.000Z	27 \| good	5.383 \| good	10.629 \| good	12.864 \| good	0.597 \| good	6.892 \| good	0.279 \| good
2026-09-28T08:00:00.000Z	33 \| good	5.83 \| good	12.089 \| good	24.903 \| good	0.595 \| good	9.258 \| good	0.264 \| good
2026-09-28T09:00:00.000Z	33 \| good	5.551 \| good	19.587 \| good	13.627 \| good	0.668 \| good	19.234 \| good	0.235 \| good
2026-09-28T10:00:00.000Z	22 \| good	4.423 \| good	11.677 \| good	18.338 \| good	0.667 \| good	20.628 \| good	0.221 \| good
2026-09-28T11:00:00.000Z	27 \| good	4.9 \| good	12.08 \| good	23.728 \| good	0.734 \| good	8.189 \| good	0.212 \| good
2026-09-28T12:00:00.000Z	27 \| good	4.657 \| good	14 \| good	18.138 \| good	0.736 \| good	14.811 \| good	0.188 \| good
2026-09-28T13:00:00.000Z	27 \| good	4.908 \| good	13.8 \| good	22.684 \| good	0.582 \| good	14.546 \| good	0.165 \| good
2026-09-28T14:00:00.000Z	27 \| good	4.734 \| good	12.656 \| good	20.31 \| good	0.51 \| good	11.027 \| good	0.162 \| good
2026-09-28T15:00:00.000Z	27 \| good	4.694 \| good	14.795 \| good	22.982 \| good	0.594 \| good	12.883 \| good	0.156 \| good
2026-09-28T16:00:00.000Z	22 \| good	4.273 \| good	14.2 \| good	24.341 \| good	0.726 \| good	12.332 \| good	0.153 \| good
2026-09-28T17:00:00.000Z	25 \| good	3.865 \| good	14.474 \| good	27.432 \| good	0.88 \| good	9.713 \| good	0.169 \| good
2026-09-28T18:00:00.000Z	29 \| good	4.032 \| good	12.858 \| good	30.609 \| good	0.741 \| good	9.194 \| good	0.216 \| good
2026-09-28T19:00:00.000Z	26 \| good	3.724 \| good	10.714 \| good	28.102 \| good	0.664 \| good	5.238 \| good	0.253 \| good
2026-09-28T20:00:00.000Z	28 \| good	3.874 \| good	11.658 \| good	29.789 \| good	0.585 \| good	4.915 \| good	0.324 \| good
2026-09-28T21:00:00.000Z	27 \| good	4.851 \| good	13.2 \| good	27.319 \| good	0.589 \| good	7.457 \| good	0.312 \| good
2026-09-28T22:00:00.000Z	30 \| good	4.879 \| good	16.583 \| good	32.365 \| good	0.591 \| good	7.775 \| good	0.352 \| good
2026-09-28T22:00:00.000Z	27 \| good	4.851 \| good	13.2 \| good	27.319 \| good	0.589 \| good	7.457 \| good	0.312 \| good
2026-09-28T23:00:00.000Z	27 \| good	4.548 \| good	8.737 \| good	20.284 \| good	0.299 \| good	6.665 \| good	0.146 \| good
2026-09-29T00:00:00.000Z	27 \| good	5.061 \| good	8.187 \| good	24.434 \| good	0.235 \| good	5.526 \| good	0.135 \| good
2026-09-29T01:00:00.000Z	23 \| good	4.117 \| good	7.743 \| good	24.923 \| good	0.201 \| good	4.075 \| good	0.128 \| good
2026-09-29T02:00:00.000Z	24 \| good	3.928 \| good	7.439 \| good	25.895 \| good	0.183 \| good	3.781 \| good	0.124 \| good
2026-09-29T03:00:00.000Z	24 \| good	4.004 \| good	7.206 \| good	26.366 \| good	0.175 \| good	3.299 \| good	0.122 \| good
2026-09-29T04:00:00.000Z	24 \| good	3.91 \| good	6.918 \| good	26.431 \| good	0.172 \| good	3.38 \| good	0.121 \| good
2026-09-29T05:00:00.000Z	27 \| good	4.501 \| good	7.302 \| good	26.7 \| good	0.171 \| good	3.617 \| good	0.12 \| good
2026-09-29T06:00:00.000Z	23 \| good	4.314 \| good	7.443 \| good	25.136 \| good	0.205 \| good	4.966 \| good	0.123 \| good
2026-09-29T07:00:00.000Z	27 \| good	5.019 \| good	7.673 \| good	22.444 \| good	0.281 \| good	6.92 \| good	0.137 \| good
2026-09-29T08:00:00.000Z	27 \| good	5.287 \| good	7.499 \| good	20.539 \| good	0.338 \| good	8.271 \| good	0.141 \| good
2026-09-29T09:00:00.000Z	27 \| good	5.465 \| good	8.316 \| good	24.167 \| good	0.363 \| good	7.624 \| good	0.148 \| good
2026-09-29T10:00:00.000Z	38 \| good	7.179 \| good	10.025 \| good	26.521 \| good	0.393 \| good	5.994 \| good	0.155 \| good
2026-09-29T11:00:00.000Z	44 \| good	8.245 \| good	11.239 \| good	30.698 \| good	0.461 \| good	5.306 \| good	0.158 \| good
2026-09-29T12:00:00.000Z	44 \| good	8.499 \| good	11.937 \| good	32.885 \| good	0.488 \| good	5.183 \| good	0.157 \| good
2026-09-29T13:00:00.000Z	49 \| good	9.491 \| good	12.482 \| good	36.95 \| good	0.498 \| good	4.634 \| good	0.16 \| good
2026-09-29T14:00:00.000Z	49 \| good	9.471 \| good	13.17 \| good	39.562 \| good	0.5 \| good	4.404 \| good	0.159 \| good
2026-09-29T15:00:00.000Z	44 \| good	8.299 \| good	12.507 \| good	40.372 \| good	0.461 \| good	4.767 \| good	0.158 \| good
2026-09-29T16:00:00.000Z	44 \| good	7.928 \| good	12.665 \| good	39.96 \| good	0.403 \| good	5.685 \| good	0.158 \| good
2026-09-29T17:00:00.000Z	44 \| good	8.241 \| good	12.957 \| good	38.315 \| good	0.417 \| good	7.983 \| good	0.162 \| good
2026-09-29T18:00:00.000Z	52 \| moderate	10.374 \| good	15.851 \| good	32.983 \| good	0.488 \| good	10.843 \| good	0.178 \| good
2026-09-29T19:00:00.000Z	52 \| moderate	10.062 \| good	17.853 \| good	28.963 \| good	0.608 \| good	12.532 \| good	0.184 \| good
2026-09-29T20:00:00.000Z	54 \| moderate	11.405 \| good	18.515 \| good	28.719 \| good	0.68 \| good	11.142 \| good	0.181 \| good
2026-09-29T21:00:00.000Z	58 \| moderate	13.355 \| fine	18.57 \| good	25.868 \| good	0.56 \| good	10.677 \| good	0.17 \| good
2026-09-29T22:00:00.000Z	54 \| moderate	10.82 \| good	15.725 \| good	26.009 \| good	0.423 \| good	8.166 \| good	0.159 \| good
2026-09-29T23:00:00.000Z	49 \| good	8.609 \| good	12.317 \| good	31.589 \| good	0.398 \| good	7.125 \| good	0.146 \| good
2026-09-30T00:00:00.000Z	33 \| good	6.406 \| good	10.31 \| good	32.911 \| good	0.331 \| good	5.544 \| good	0.144 \| good
2026-09-30T01:00:00.000Z	30 \| good	5.26 \| good	9.215 \| good	32.323 \| good	0.296 \| good	4.184 \| good	0.133 \| good
2026-09-30T02:00:00.000Z	30 \| good	4.321 \| good	8.848 \| good	32.365 \| good	0.329 \| good	2.984 \| good	0.128 \| good
2026-09-30T03:00:00.000Z	31 \| good	4.413 \| good	8.947 \| good	32.837 \| good	0.321 \| good	2.62 \| good	0.126 \| good
2026-09-30T04:00:00.000Z	31 \| good	4.576 \| good	10.34 \| good	32.518 \| good	0.291 \| good	2.852 \| good	0.124 \| good
2026-09-30T05:00:00.000Z	30 \| good	4.812 \| good	11.449 \| good	32.423 \| good	0.231 \| good	3.112 \| good	0.126 \| good
2026-09-30T06:00:00.000Z	33 \| good	5.511 \| good	11.708 \| good	32.262 \| good	0.21 \| good	4.045 \| good	0.128 \| good
2026-09-30T07:00:00.000Z	33 \| good	6.172 \| good	10.44 \| good	30.759 \| good	0.241 \| good	5.752 \| good	0.131 \| good
2026-09-30T08:00:00.000Z	27 \| good	5.023 \| good	7.998 \| good	28.038 \| good	0.249 \| good	6.932 \| good	0.134 \| good
2026-09-30T09:00:00.000Z	27 \| good	4.64 \| good	6.857 \| good	27.056 \| good	0.222 \| good	6.881 \| good	0.136 \| good
2026-09-30T10:00:00.000Z	33 \| good	5.501 \| good	6.778 \| good	29.675 \| good	0.158 \| good	5.641 \| good	0.127 \| good
2026-09-30T11:00:00.000Z	30 \| good	5.078 \| good	6.107 \| good	31.582 \| good	0.149 \| good	3.049 \| good	0.116 \| good
2026-09-30T12:00:00.000Z	30 \| good	4.448 \| good	6.568 \| good	32.376 \| good	0.122 \| good	2.435 \| good	0.11 \| good
2026-09-30T13:00:00.000Z	32 \| good	4.563 \| good	7.263 \| good	35.103 \| good	0.119 \| good	1.935 \| good	0.11 \| good
2026-09-30T14:00:00.000Z	33 \| good	3.991 \| good	7.519 \| good	36.137 \| good	0.137 \| good	1.899 \| good	0.111 \| good
2026-09-30T15:00:00.000Z	33 \| good	4.085 \| good	8.276 \| good	35.688 \| good	0.155 \| good	2.41 \| good	0.111 \| good
2026-09-30T16:00:00.000Z	31 \| good	4.514 \| good	8.561 \| good	34.459 \| good	0.187 \| good	3.327 \| good	0.115 \| good
2026-09-30T17:00:00.000Z	30 \| good	4.65 \| good	9.135 \| good	31.66 \| good	0.225 \| good	5.063 \| good	0.124 \| good
2026-09-30T18:00:00.000Z	27 \| good	5.287 \| good	11.35 \| good	27.239 \| good	0.307 \| good	7.032 \| good	0.132 \| good
2026-09-30T19:00:00.000Z	33 \| good	6.06 \| good	12.178 \| good	23.404 \| good	0.34 \| good	7.92 \| good	0.133 \| good
2026-09-30T20:00:00.000Z	38 \| good	6.577 \| good	13.282 \| good	22.194 \| good	0.389 \| good	8.662 \| good	0.136 \| good
2026-09-30T21:00:00.000Z	38 \| good	7.095 \| good	14.885 \| good	21.005 \| good	0.449 \| good	8.973 \| good	0.141 \| good
2026-09-30T22:00:00.000Z	44 \| good	7.751 \| good	15.653 \| good	21.203 \| good	0.47 \| good	8.776 \| good	0.143 \| good

Hemel Hempstead, Hertfordshire live air quality index now

Major air pollutants in Hemel Hempstead, Hertfordshire

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Hemel Hempstead, Hertfordshire air quality forecast and history

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Hemel Hempstead, Hertfordshire air quality map: Track AQI near you

Air quality in nearby cities

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Air quality levels in UK

Frequently asked questions

How often is the air quality data for Hemel Hempstead, Hertfordshire updated?

When was the worst air quality at Hemel Hempstead, Hertfordshire in the last 24 hrs?

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What is the current air quality in Hemel Hempstead, Hertfordshire?

What pollutant is the most common in Hemel Hempstead, Hertfordshire?

What should I do if the air quality in Hemel Hempstead, Hertfordshire is poor?

What is the current concentration of PM2.5 in Hemel Hempstead, Hertfordshire?

What is the current concentration of PM10 in Hemel Hempstead, Hertfordshire?

What is the current concentration of carbon monoxide (CO) in Hemel Hempstead, Hertfordshire?

What is the current concentration of sulfur dioxide (SO2) in Hemel Hempstead, Hertfordshire?

What is the current concentration of ozone (O3) in Hemel Hempstead, Hertfordshire?

What is the current concentration of nitrogen dioxide (NO2) in Hemel Hempstead, Hertfordshire?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the current concentration of PM_2.5 in Hemel Hempstead, Hertfordshire?

What is the current concentration of PM₁₀ in Hemel Hempstead, Hertfordshire?

What is the current concentration of sulfur dioxide (SO₂) in Hemel Hempstead, Hertfordshire?

What is the current concentration of ozone (O₃) in Hemel Hempstead, Hertfordshire?

What is the current concentration of nitrogen dioxide (NO₂) in Hemel Hempstead, Hertfordshire?