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

The current PM10 concentration at Hemel Hempstead, Hertfordshire is 30.501 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 1.001 ppb.

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

The current ozone (O3) concentration at Hemel Hempstead, Hertfordshire is 36.962 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 12.886 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 9.079 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)

9.28 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

25.96 μg/m³

155

255

425

605+

Ozone (O₃)

43.40 ppb

201

201+

Sulfur Dioxide (SO₂)

1.12 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

17.17 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.12 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
2026-07-08T15:00:00.000Z	54 \| moderate	10.993 \| good	19.04 \| good	38.531 \| good	2.814 \| good	13.345 \| good	0.007 \| good
2026-07-08T16:00:00.000Z	52 \| moderate	9.585 \| good	18.601 \| good	40.096 \| good	1.048 \| good	13.577 \| good	0.006 \| good
2026-07-08T17:00:00.000Z	49 \| good	9.441 \| good	17.617 \| good	39.231 \| good	0.845 \| good	12.494 \| good	0.007 \| good
2026-07-08T18:00:00.000Z	54 \| moderate	10.75 \| good	22.003 \| good	46.542 \| good	0.671 \| good	12.438 \| good	0.009 \| good
2026-07-08T19:00:00.000Z	49 \| good	8.97 \| good	14.887 \| good	48.363 \| good	0.639 \| good	13.067 \| good	0.007 \| good
2026-07-08T20:00:00.000Z	52 \| moderate	10.362 \| good	23.4 \| good	55.36 \| fine	0.564 \| good	7.192 \| good	0.007 \| good
2026-07-08T21:00:00.000Z	52 \| moderate	10.479 \| good	32.808 \| good	52.087 \| good	0.655 \| good	10.735 \| good	0.007 \| good
2026-07-08T22:00:00.000Z	52 \| moderate	9.565 \| good	34.512 \| good	52.668 \| good	0.712 \| good	14.36 \| good	0.007 \| good
2026-07-08T23:00:00.000Z	49 \| good	9.493 \| good	34.552 \| good	43.927 \| good	0.831 \| good	5.664 \| good	0.006 \| good
2026-07-09T00:00:00.000Z	54 \| moderate	11.477 \| good	27.118 \| good	55.14 \| fine	0.799 \| good	11.646 \| good	0.118 \| good
2026-07-09T01:00:00.000Z	54 \| moderate	11.457 \| good	27.795 \| good	47.307 \| good	0.902 \| good	9.872 \| good	0.11 \| good
2026-07-09T02:00:00.000Z	52 \| moderate	10.43 \| good	24.108 \| good	45.99 \| good	0.966 \| good	11.172 \| good	0.096 \| good
2026-07-09T03:00:00.000Z	52 \| moderate	10.423 \| good	24.8 \| good	45.106 \| good	0.937 \| good	10.202 \| good	0.101 \| good
2026-07-09T04:00:00.000Z	58 \| moderate	12.971 \| fine	34.984 \| good	39.058 \| good	0.804 \| good	15.495 \| good	0.104 \| good
2026-07-09T05:00:00.000Z	58 \| moderate	13.205 \| fine	44.173 \| good	29.655 \| good	0.727 \| good	23.025 \| good	0.005 \| good
2026-07-09T06:00:00.000Z	62 \| moderate	15.303 \| fine	31.514 \| good	36.013 \| good	0.779 \| good	18.144 \| good	0.006 \| good
2026-07-09T07:00:00.000Z	58 \| moderate	13.187 \| fine	36.775 \| good	38.442 \| good	0.866 \| good	18.386 \| good	0.006 \| good
2026-07-09T08:00:00.000Z	60 \| moderate	13.516 \| fine	36.417 \| good	19.987 \| good	0.856 \| good	16.309 \| good	0.006 \| good
2026-07-09T09:00:00.000Z	60 \| moderate	14.114 \| fine	44.746 \| good	30.373 \| good	0.944 \| good	10.022 \| good	0.006 \| good
2026-07-09T10:00:00.000Z	60 \| moderate	14.324 \| fine	39.298 \| good	35.685 \| good	0.831 \| good	17.77 \| good	0.142 \| good
2026-07-09T11:00:00.000Z	62 \| moderate	14.756 \| fine	43.938 \| good	35.223 \| good	0.831 \| good	16.008 \| good	0.006 \| good
2026-07-09T12:00:00.000Z	62 \| moderate	14.983 \| fine	48.424 \| good	43.324 \| good	0.753 \| good	11.861 \| good	0.006 \| good
2026-07-09T13:00:00.000Z	60 \| moderate	13.865 \| fine	49.04 \| good	33.076 \| good	0.754 \| good	9.647 \| good	0.006 \| good
2026-07-09T14:00:00.000Z	60 \| moderate	13.658 \| fine	25.077 \| good	42.674 \| good	0.831 \| good	13.562 \| good	0.006 \| good
2026-07-09T15:00:00.000Z	58 \| moderate	12.814 \| fine	34.872 \| good	50.657 \| good	0.813 \| good	11.643 \| good	0.106 \| good
2026-07-09T16:00:00.000Z	52 \| moderate	9.949 \| good	30.459 \| good	49.071 \| good	0.676 \| good	10.005 \| good	0.007 \| good
2026-07-09T17:00:00.000Z	74 \| moderate	14.939 \| fine	57.206 \| fine	62.472 \| fine	0.755 \| good	18.556 \| good	0.142 \| good
2026-07-09T18:00:00.000Z	101 \| sensitive	15.033 \| fine	29.82 \| good	71.16 \| moderate	0.642 \| good	14.412 \| good	0.128 \| good
2026-07-09T19:00:00.000Z	93 \| moderate	15.383 \| fine	53.069 \| good	67.869 \| fine	0.54 \| good	14.253 \| good	0.182 \| good
2026-07-09T20:00:00.000Z	100 \| moderate	14.898 \| fine	41.928 \| good	69.666 \| fine	0.651 \| good	18.045 \| good	0.153 \| good
2026-07-09T21:00:00.000Z	60 \| moderate	13.617 \| fine	30.74 \| good	40.952 \| good	0.639 \| good	13.066 \| good	0.006 \| good
2026-07-09T22:00:00.000Z	62 \| moderate	15.488 \| fine	24.927 \| good	55.129 \| fine	0.667 \| good	13.006 \| good	0.006 \| good
2026-07-09T23:00:00.000Z	56 \| moderate	12.44 \| fine	32.289 \| good	49.058 \| good	0.778 \| good	10.83 \| good	0.005 \| good
2026-07-10T00:00:00.000Z	58 \| moderate	12.915 \| fine	24.645 \| good	50.62 \| good	0.648 \| good	6.738 \| good	0.104 \| good
2026-07-10T01:00:00.000Z	44 \| good	7.518 \| good	20.645 \| good	35.071 \| good	0.825 \| good	6.685 \| good	0.104 \| good
2026-07-10T02:00:00.000Z	58 \| moderate	13.335 \| fine	41.463 \| good	40.705 \| good	0.604 \| good	12.469 \| good	0.103 \| good
2026-07-10T03:00:00.000Z	56 \| moderate	12.201 \| fine	38.74 \| good	34.138 \| good	0.973 \| good	11.515 \| good	0.106 \| good
2026-07-10T04:00:00.000Z	56 \| moderate	11.954 \| good	28.569 \| good	29.908 \| good	0.707 \| good	11.484 \| good	0.118 \| good
2026-07-10T05:00:00.000Z	38 \| good	7.38 \| good	27.015 \| good	27.547 \| good	0.443 \| good	9.404 \| good	0.132 \| good
2026-07-10T06:00:00.000Z	54 \| moderate	11.216 \| good	31.401 \| good	31.552 \| good	0.698 \| good	14.095 \| good	0.137 \| good
2026-07-10T07:00:00.000Z	56 \| moderate	12.1 \| fine	40.366 \| good	31.19 \| good	0.707 \| good	14.847 \| good	0.142 \| good
2026-07-10T08:00:00.000Z	56 \| moderate	11.642 \| good	32.014 \| good	19.902 \| good	0.808 \| good	12.435 \| good	0.125 \| good
2026-07-10T09:00:00.000Z	52 \| moderate	10.301 \| good	32.525 \| good	30.436 \| good	0.91 \| good	14.943 \| good	0.123 \| good
2026-07-10T10:00:00.000Z	49 \| good	9.119 \| good	15.589 \| good	33.944 \| good	0.61 \| good	9.746 \| good	0.13 \| good
2026-07-10T11:00:00.000Z	52 \| moderate	10.397 \| good	21.696 \| good	33.404 \| good	1.005 \| good	13.249 \| good	0.116 \| good
2026-07-10T12:00:00.000Z	49 \| good	8.534 \| good	29.024 \| good	32.173 \| good	0.901 \| good	12.147 \| good	0.111 \| good
2026-07-10T13:00:00.000Z	49 \| good	9.079 \| good	30.501 \| good	36.962 \| good	1.001 \| good	12.886 \| good	0.113 \| good
2026-07-10T14:00:00.000Z	49 \| good	9.283 \| good	25.957 \| good	43.396 \| good	1.118 \| good	17.166 \| good	0.116 \| good
2026-07-10T14:00:00.000Z	49 \| good	9.283 \| good	25.957 \| good	43.396 \| good	1.118 \| good	17.166 \| good	0.116 \| good
2026-07-10T15:00:00.000Z	49 \| good	5.548 \| good	8.662 \| good	52.693 \| good	0.151 \| good	1.687 \| good	0.114 \| good
2026-07-10T16:00:00.000Z	46 \| good	5.181 \| good	8.288 \| good	50.249 \| good	0.137 \| good	1.791 \| good	0.113 \| good
2026-07-10T17:00:00.000Z	45 \| good	5.026 \| good	8.037 \| good	48.945 \| good	0.133 \| good	2.082 \| good	0.112 \| good
2026-07-10T18:00:00.000Z	43 \| good	4.594 \| good	7.942 \| good	46.49 \| good	0.149 \| good	2.516 \| good	0.112 \| good
2026-07-10T19:00:00.000Z	38 \| good	4.331 \| good	8.025 \| good	41.301 \| good	0.165 \| good	2.837 \| good	0.109 \| good
2026-07-10T20:00:00.000Z	32 \| good	4.433 \| good	8.3 \| good	35.289 \| good	0.191 \| good	3.425 \| good	0.108 \| good
2026-07-10T21:00:00.000Z	30 \| good	4.859 \| good	8.383 \| good	31.545 \| good	0.207 \| good	4.279 \| good	0.107 \| good
2026-07-10T22:00:00.000Z	28 \| good	5.181 \| good	8.33 \| good	30.1 \| good	0.243 \| good	4.997 \| good	0.105 \| good
2026-07-10T23:00:00.000Z	27 \| good	5.208 \| good	8.649 \| good	27.956 \| good	0.242 \| good	5.312 \| good	0.107 \| good
2026-07-11T00:00:00.000Z	27 \| good	5.175 \| good	8.657 \| good	27.268 \| good	0.222 \| good	5.079 \| good	0.107 \| good
2026-07-11T01:00:00.000Z	27 \| good	5.081 \| good	8.845 \| good	27.168 \| good	0.187 \| good	4.575 \| good	0.107 \| good
2026-07-11T02:00:00.000Z	27 \| good	5.103 \| good	8.892 \| good	26.538 \| good	0.149 \| good	3.773 \| good	0.106 \| good
2026-07-11T03:00:00.000Z	27 \| good	5.194 \| good	8.884 \| good	26.113 \| good	0.128 \| good	3.259 \| good	0.105 \| good
2026-07-11T04:00:00.000Z	33 \| good	5.825 \| good	9.028 \| good	25.402 \| good	0.122 \| good	2.867 \| good	0.104 \| good
2026-07-11T05:00:00.000Z	33 \| good	5.864 \| good	9.475 \| good	24.325 \| good	0.129 \| good	2.883 \| good	0.103 \| good
2026-07-11T06:00:00.000Z	33 \| good	5.964 \| good	9.803 \| good	27.205 \| good	0.144 \| good	2.762 \| good	0.103 \| good
2026-07-11T07:00:00.000Z	33 \| good	6.064 \| good	10.178 \| good	28.513 \| good	0.16 \| good	2.494 \| good	0.108 \| good
2026-07-11T08:00:00.000Z	33 \| good	5.612 \| good	10.419 \| good	31.22 \| good	0.176 \| good	2.343 \| good	0.109 \| good
2026-07-11T09:00:00.000Z	33 \| good	5.361 \| good	10.019 \| good	36.218 \| good	0.176 \| good	2.026 \| good	0.11 \| good
2026-07-11T10:00:00.000Z	39 \| good	5.517 \| good	8.807 \| good	41.83 \| good	0.165 \| good	1.631 \| good	0.11 \| good
2026-07-11T11:00:00.000Z	43 \| good	5.449 \| good	8.318 \| good	46.067 \| good	0.145 \| good	1.351 \| good	0.109 \| good
2026-07-11T12:00:00.000Z	44 \| good	5.402 \| good	8.329 \| good	48.144 \| good	0.125 \| good	1.209 \| good	0.107 \| good
2026-07-11T13:00:00.000Z	45 \| good	5.258 \| good	8.401 \| good	48.533 \| good	0.111 \| good	1.105 \| good	0.104 \| good
2026-07-11T14:00:00.000Z	45 \| good	5.143 \| good	8.516 \| good	48.719 \| good	0.1 \| good	1.069 \| good	0.103 \| good
2026-07-11T15:00:00.000Z	45 \| good	5.064 \| good	8.392 \| good	48.547 \| good	0.091 \| good	1.096 \| good	0.102 \| good
2026-07-11T16:00:00.000Z	44 \| good	4.859 \| good	7.949 \| good	47.78 \| good	0.085 \| good	1.19 \| good	0.101 \| good
2026-07-11T17:00:00.000Z	43 \| good	4.576 \| good	7.386 \| good	45.854 \| good	0.092 \| good	1.314 \| good	0.099 \| good
2026-07-11T18:00:00.000Z	40 \| good	4.8 \| good	7.24 \| good	42.652 \| good	0.107 \| good	1.483 \| good	0.096 \| good
2026-07-11T19:00:00.000Z	35 \| good	4.413 \| good	6.277 \| good	38.267 \| good	0.111 \| good	1.654 \| good	0.092 \| good
2026-07-11T20:00:00.000Z	32 \| good	3.947 \| good	5.973 \| good	34.805 \| good	0.109 \| good	2.036 \| good	0.09 \| good
2026-07-11T21:00:00.000Z	31 \| good	3.971 \| good	6.145 \| good	32.583 \| good	0.115 \| good	2.267 \| good	0.089 \| good
2026-07-11T22:00:00.000Z	29 \| good	3.913 \| good	6.592 \| good	31.249 \| good	0.124 \| good	2.295 \| good	0.09 \| good
2026-07-11T23:00:00.000Z	28 \| good	3.84 \| good	6.6 \| good	29.554 \| good	0.107 \| good	2.251 \| good	0.089 \| good
2026-07-12T00:00:00.000Z	26 \| good	4.154 \| good	6.605 \| good	28.409 \| good	0.1 \| good	2.379 \| good	0.089 \| good
2026-07-12T01:00:00.000Z	27 \| good	4.577 \| good	7.258 \| good	27.701 \| good	0.098 \| good	2.005 \| good	0.089 \| good
2026-07-12T02:00:00.000Z	27 \| good	4.937 \| good	8.416 \| good	28.537 \| good	0.091 \| good	1.767 \| good	0.089 \| good
2026-07-12T03:00:00.000Z	27 \| good	5.207 \| good	9.416 \| good	29.016 \| good	0.086 \| good	1.621 \| good	0.089 \| good
2026-07-12T04:00:00.000Z	28 \| good	5.407 \| good	9.713 \| good	29.845 \| good	0.091 \| good	1.492 \| good	0.089 \| good
2026-07-12T05:00:00.000Z	33 \| good	5.514 \| good	9.763 \| good	30.11 \| good	0.097 \| good	1.359 \| good	0.089 \| good
2026-07-12T06:00:00.000Z	28 \| good	5.444 \| good	10.704 \| good	30.282 \| good	0.108 \| good	1.252 \| good	0.088 \| good
2026-07-12T07:00:00.000Z	33 \| good	5.9 \| good	11.114 \| good	31.311 \| good	0.128 \| good	1.321 \| good	0.094 \| good
2026-07-12T08:00:00.000Z	33 \| good	6.121 \| good	11.334 \| good	32.045 \| good	0.137 \| good	1.284 \| good	0.096 \| good
2026-07-12T09:00:00.000Z	33 \| good	6.122 \| good	11.693 \| good	34.196 \| good	0.14 \| good	1.277 \| good	0.096 \| good
2026-07-12T10:00:00.000Z	34 \| good	6.236 \| good	11.974 \| good	37.36 \| good	0.149 \| good	1.151 \| good	0.097 \| good
2026-07-12T11:00:00.000Z	38 \| good	6.146 \| good	12.176 \| good	41.183 \| good	0.153 \| good	1.023 \| good	0.097 \| good
2026-07-12T12:00:00.000Z	42 \| good	5.843 \| good	11.614 \| good	44.713 \| good	0.145 \| good	0.958 \| good	0.097 \| good
2026-07-12T13:00:00.000Z	44 \| good	5.755 \| good	11.216 \| good	47.591 \| good	0.138 \| good	0.943 \| good	0.096 \| good
2026-07-12T14:00:00.000Z	44 \| good	5.542 \| good	11.019 \| good	48.43 \| good	0.128 \| good	0.878 \| good	0.096 \| good

Hemel Hempstead

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

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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 06:00:00 on 2026-07-09.

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 05:00:00 on 2026-07-10.

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

The current air quality in Hemel Hempstead, Hertfordshire is 49, 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 9.079 μg/m³.

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

The current PM₁₀ concentration at Hemel Hempstead, Hertfordshire is 30.501 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 0.113 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 1.001 ppb.

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

The current ozone (O₃) concentration at Hemel Hempstead, Hertfordshire is 36.962 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 12.886 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-08T15:00:00.000Z	54 \| moderate	10.993 \| good	19.04 \| good	38.531 \| good	2.814 \| good	13.345 \| good	0.007 \| good
2026-07-08T16:00:00.000Z	52 \| moderate	9.585 \| good	18.601 \| good	40.096 \| good	1.048 \| good	13.577 \| good	0.006 \| good
2026-07-08T17:00:00.000Z	49 \| good	9.441 \| good	17.617 \| good	39.231 \| good	0.845 \| good	12.494 \| good	0.007 \| good
2026-07-08T18:00:00.000Z	54 \| moderate	10.75 \| good	22.003 \| good	46.542 \| good	0.671 \| good	12.438 \| good	0.009 \| good
2026-07-08T19:00:00.000Z	49 \| good	8.97 \| good	14.887 \| good	48.363 \| good	0.639 \| good	13.067 \| good	0.007 \| good
2026-07-08T20:00:00.000Z	52 \| moderate	10.362 \| good	23.4 \| good	55.36 \| fine	0.564 \| good	7.192 \| good	0.007 \| good
2026-07-08T21:00:00.000Z	52 \| moderate	10.479 \| good	32.808 \| good	52.087 \| good	0.655 \| good	10.735 \| good	0.007 \| good
2026-07-08T22:00:00.000Z	52 \| moderate	9.565 \| good	34.512 \| good	52.668 \| good	0.712 \| good	14.36 \| good	0.007 \| good
2026-07-08T23:00:00.000Z	49 \| good	9.493 \| good	34.552 \| good	43.927 \| good	0.831 \| good	5.664 \| good	0.006 \| good
2026-07-09T00:00:00.000Z	54 \| moderate	11.477 \| good	27.118 \| good	55.14 \| fine	0.799 \| good	11.646 \| good	0.118 \| good
2026-07-09T01:00:00.000Z	54 \| moderate	11.457 \| good	27.795 \| good	47.307 \| good	0.902 \| good	9.872 \| good	0.11 \| good
2026-07-09T02:00:00.000Z	52 \| moderate	10.43 \| good	24.108 \| good	45.99 \| good	0.966 \| good	11.172 \| good	0.096 \| good
2026-07-09T03:00:00.000Z	52 \| moderate	10.423 \| good	24.8 \| good	45.106 \| good	0.937 \| good	10.202 \| good	0.101 \| good
2026-07-09T04:00:00.000Z	58 \| moderate	12.971 \| fine	34.984 \| good	39.058 \| good	0.804 \| good	15.495 \| good	0.104 \| good
2026-07-09T05:00:00.000Z	58 \| moderate	13.205 \| fine	44.173 \| good	29.655 \| good	0.727 \| good	23.025 \| good	0.005 \| good
2026-07-09T06:00:00.000Z	62 \| moderate	15.303 \| fine	31.514 \| good	36.013 \| good	0.779 \| good	18.144 \| good	0.006 \| good
2026-07-09T07:00:00.000Z	58 \| moderate	13.187 \| fine	36.775 \| good	38.442 \| good	0.866 \| good	18.386 \| good	0.006 \| good
2026-07-09T08:00:00.000Z	60 \| moderate	13.516 \| fine	36.417 \| good	19.987 \| good	0.856 \| good	16.309 \| good	0.006 \| good
2026-07-09T09:00:00.000Z	60 \| moderate	14.114 \| fine	44.746 \| good	30.373 \| good	0.944 \| good	10.022 \| good	0.006 \| good
2026-07-09T10:00:00.000Z	60 \| moderate	14.324 \| fine	39.298 \| good	35.685 \| good	0.831 \| good	17.77 \| good	0.142 \| good
2026-07-09T11:00:00.000Z	62 \| moderate	14.756 \| fine	43.938 \| good	35.223 \| good	0.831 \| good	16.008 \| good	0.006 \| good
2026-07-09T12:00:00.000Z	62 \| moderate	14.983 \| fine	48.424 \| good	43.324 \| good	0.753 \| good	11.861 \| good	0.006 \| good
2026-07-09T13:00:00.000Z	60 \| moderate	13.865 \| fine	49.04 \| good	33.076 \| good	0.754 \| good	9.647 \| good	0.006 \| good
2026-07-09T14:00:00.000Z	60 \| moderate	13.658 \| fine	25.077 \| good	42.674 \| good	0.831 \| good	13.562 \| good	0.006 \| good
2026-07-09T15:00:00.000Z	58 \| moderate	12.814 \| fine	34.872 \| good	50.657 \| good	0.813 \| good	11.643 \| good	0.106 \| good
2026-07-09T16:00:00.000Z	52 \| moderate	9.949 \| good	30.459 \| good	49.071 \| good	0.676 \| good	10.005 \| good	0.007 \| good
2026-07-09T17:00:00.000Z	74 \| moderate	14.939 \| fine	57.206 \| fine	62.472 \| fine	0.755 \| good	18.556 \| good	0.142 \| good
2026-07-09T18:00:00.000Z	101 \| sensitive	15.033 \| fine	29.82 \| good	71.16 \| moderate	0.642 \| good	14.412 \| good	0.128 \| good
2026-07-09T19:00:00.000Z	93 \| moderate	15.383 \| fine	53.069 \| good	67.869 \| fine	0.54 \| good	14.253 \| good	0.182 \| good
2026-07-09T20:00:00.000Z	100 \| moderate	14.898 \| fine	41.928 \| good	69.666 \| fine	0.651 \| good	18.045 \| good	0.153 \| good
2026-07-09T21:00:00.000Z	60 \| moderate	13.617 \| fine	30.74 \| good	40.952 \| good	0.639 \| good	13.066 \| good	0.006 \| good
2026-07-09T22:00:00.000Z	62 \| moderate	15.488 \| fine	24.927 \| good	55.129 \| fine	0.667 \| good	13.006 \| good	0.006 \| good
2026-07-09T23:00:00.000Z	56 \| moderate	12.44 \| fine	32.289 \| good	49.058 \| good	0.778 \| good	10.83 \| good	0.005 \| good
2026-07-10T00:00:00.000Z	58 \| moderate	12.915 \| fine	24.645 \| good	50.62 \| good	0.648 \| good	6.738 \| good	0.104 \| good
2026-07-10T01:00:00.000Z	44 \| good	7.518 \| good	20.645 \| good	35.071 \| good	0.825 \| good	6.685 \| good	0.104 \| good
2026-07-10T02:00:00.000Z	58 \| moderate	13.335 \| fine	41.463 \| good	40.705 \| good	0.604 \| good	12.469 \| good	0.103 \| good
2026-07-10T03:00:00.000Z	56 \| moderate	12.201 \| fine	38.74 \| good	34.138 \| good	0.973 \| good	11.515 \| good	0.106 \| good
2026-07-10T04:00:00.000Z	56 \| moderate	11.954 \| good	28.569 \| good	29.908 \| good	0.707 \| good	11.484 \| good	0.118 \| good
2026-07-10T05:00:00.000Z	38 \| good	7.38 \| good	27.015 \| good	27.547 \| good	0.443 \| good	9.404 \| good	0.132 \| good
2026-07-10T06:00:00.000Z	54 \| moderate	11.216 \| good	31.401 \| good	31.552 \| good	0.698 \| good	14.095 \| good	0.137 \| good
2026-07-10T07:00:00.000Z	56 \| moderate	12.1 \| fine	40.366 \| good	31.19 \| good	0.707 \| good	14.847 \| good	0.142 \| good
2026-07-10T08:00:00.000Z	56 \| moderate	11.642 \| good	32.014 \| good	19.902 \| good	0.808 \| good	12.435 \| good	0.125 \| good
2026-07-10T09:00:00.000Z	52 \| moderate	10.301 \| good	32.525 \| good	30.436 \| good	0.91 \| good	14.943 \| good	0.123 \| good
2026-07-10T10:00:00.000Z	49 \| good	9.119 \| good	15.589 \| good	33.944 \| good	0.61 \| good	9.746 \| good	0.13 \| good
2026-07-10T11:00:00.000Z	52 \| moderate	10.397 \| good	21.696 \| good	33.404 \| good	1.005 \| good	13.249 \| good	0.116 \| good
2026-07-10T12:00:00.000Z	49 \| good	8.534 \| good	29.024 \| good	32.173 \| good	0.901 \| good	12.147 \| good	0.111 \| good
2026-07-10T13:00:00.000Z	49 \| good	9.079 \| good	30.501 \| good	36.962 \| good	1.001 \| good	12.886 \| good	0.113 \| good
2026-07-10T14:00:00.000Z	49 \| good	9.283 \| good	25.957 \| good	43.396 \| good	1.118 \| good	17.166 \| good	0.116 \| good
2026-07-10T14:00:00.000Z	49 \| good	9.283 \| good	25.957 \| good	43.396 \| good	1.118 \| good	17.166 \| good	0.116 \| good
2026-07-10T15:00:00.000Z	49 \| good	5.548 \| good	8.662 \| good	52.693 \| good	0.151 \| good	1.687 \| good	0.114 \| good
2026-07-10T16:00:00.000Z	46 \| good	5.181 \| good	8.288 \| good	50.249 \| good	0.137 \| good	1.791 \| good	0.113 \| good
2026-07-10T17:00:00.000Z	45 \| good	5.026 \| good	8.037 \| good	48.945 \| good	0.133 \| good	2.082 \| good	0.112 \| good
2026-07-10T18:00:00.000Z	43 \| good	4.594 \| good	7.942 \| good	46.49 \| good	0.149 \| good	2.516 \| good	0.112 \| good
2026-07-10T19:00:00.000Z	38 \| good	4.331 \| good	8.025 \| good	41.301 \| good	0.165 \| good	2.837 \| good	0.109 \| good
2026-07-10T20:00:00.000Z	32 \| good	4.433 \| good	8.3 \| good	35.289 \| good	0.191 \| good	3.425 \| good	0.108 \| good
2026-07-10T21:00:00.000Z	30 \| good	4.859 \| good	8.383 \| good	31.545 \| good	0.207 \| good	4.279 \| good	0.107 \| good
2026-07-10T22:00:00.000Z	28 \| good	5.181 \| good	8.33 \| good	30.1 \| good	0.243 \| good	4.997 \| good	0.105 \| good
2026-07-10T23:00:00.000Z	27 \| good	5.208 \| good	8.649 \| good	27.956 \| good	0.242 \| good	5.312 \| good	0.107 \| good
2026-07-11T00:00:00.000Z	27 \| good	5.175 \| good	8.657 \| good	27.268 \| good	0.222 \| good	5.079 \| good	0.107 \| good
2026-07-11T01:00:00.000Z	27 \| good	5.081 \| good	8.845 \| good	27.168 \| good	0.187 \| good	4.575 \| good	0.107 \| good
2026-07-11T02:00:00.000Z	27 \| good	5.103 \| good	8.892 \| good	26.538 \| good	0.149 \| good	3.773 \| good	0.106 \| good
2026-07-11T03:00:00.000Z	27 \| good	5.194 \| good	8.884 \| good	26.113 \| good	0.128 \| good	3.259 \| good	0.105 \| good
2026-07-11T04:00:00.000Z	33 \| good	5.825 \| good	9.028 \| good	25.402 \| good	0.122 \| good	2.867 \| good	0.104 \| good
2026-07-11T05:00:00.000Z	33 \| good	5.864 \| good	9.475 \| good	24.325 \| good	0.129 \| good	2.883 \| good	0.103 \| good
2026-07-11T06:00:00.000Z	33 \| good	5.964 \| good	9.803 \| good	27.205 \| good	0.144 \| good	2.762 \| good	0.103 \| good
2026-07-11T07:00:00.000Z	33 \| good	6.064 \| good	10.178 \| good	28.513 \| good	0.16 \| good	2.494 \| good	0.108 \| good
2026-07-11T08:00:00.000Z	33 \| good	5.612 \| good	10.419 \| good	31.22 \| good	0.176 \| good	2.343 \| good	0.109 \| good
2026-07-11T09:00:00.000Z	33 \| good	5.361 \| good	10.019 \| good	36.218 \| good	0.176 \| good	2.026 \| good	0.11 \| good
2026-07-11T10:00:00.000Z	39 \| good	5.517 \| good	8.807 \| good	41.83 \| good	0.165 \| good	1.631 \| good	0.11 \| good
2026-07-11T11:00:00.000Z	43 \| good	5.449 \| good	8.318 \| good	46.067 \| good	0.145 \| good	1.351 \| good	0.109 \| good
2026-07-11T12:00:00.000Z	44 \| good	5.402 \| good	8.329 \| good	48.144 \| good	0.125 \| good	1.209 \| good	0.107 \| good
2026-07-11T13:00:00.000Z	45 \| good	5.258 \| good	8.401 \| good	48.533 \| good	0.111 \| good	1.105 \| good	0.104 \| good
2026-07-11T14:00:00.000Z	45 \| good	5.143 \| good	8.516 \| good	48.719 \| good	0.1 \| good	1.069 \| good	0.103 \| good
2026-07-11T15:00:00.000Z	45 \| good	5.064 \| good	8.392 \| good	48.547 \| good	0.091 \| good	1.096 \| good	0.102 \| good
2026-07-11T16:00:00.000Z	44 \| good	4.859 \| good	7.949 \| good	47.78 \| good	0.085 \| good	1.19 \| good	0.101 \| good
2026-07-11T17:00:00.000Z	43 \| good	4.576 \| good	7.386 \| good	45.854 \| good	0.092 \| good	1.314 \| good	0.099 \| good
2026-07-11T18:00:00.000Z	40 \| good	4.8 \| good	7.24 \| good	42.652 \| good	0.107 \| good	1.483 \| good	0.096 \| good
2026-07-11T19:00:00.000Z	35 \| good	4.413 \| good	6.277 \| good	38.267 \| good	0.111 \| good	1.654 \| good	0.092 \| good
2026-07-11T20:00:00.000Z	32 \| good	3.947 \| good	5.973 \| good	34.805 \| good	0.109 \| good	2.036 \| good	0.09 \| good
2026-07-11T21:00:00.000Z	31 \| good	3.971 \| good	6.145 \| good	32.583 \| good	0.115 \| good	2.267 \| good	0.089 \| good
2026-07-11T22:00:00.000Z	29 \| good	3.913 \| good	6.592 \| good	31.249 \| good	0.124 \| good	2.295 \| good	0.09 \| good
2026-07-11T23:00:00.000Z	28 \| good	3.84 \| good	6.6 \| good	29.554 \| good	0.107 \| good	2.251 \| good	0.089 \| good
2026-07-12T00:00:00.000Z	26 \| good	4.154 \| good	6.605 \| good	28.409 \| good	0.1 \| good	2.379 \| good	0.089 \| good
2026-07-12T01:00:00.000Z	27 \| good	4.577 \| good	7.258 \| good	27.701 \| good	0.098 \| good	2.005 \| good	0.089 \| good
2026-07-12T02:00:00.000Z	27 \| good	4.937 \| good	8.416 \| good	28.537 \| good	0.091 \| good	1.767 \| good	0.089 \| good
2026-07-12T03:00:00.000Z	27 \| good	5.207 \| good	9.416 \| good	29.016 \| good	0.086 \| good	1.621 \| good	0.089 \| good
2026-07-12T04:00:00.000Z	28 \| good	5.407 \| good	9.713 \| good	29.845 \| good	0.091 \| good	1.492 \| good	0.089 \| good
2026-07-12T05:00:00.000Z	33 \| good	5.514 \| good	9.763 \| good	30.11 \| good	0.097 \| good	1.359 \| good	0.089 \| good
2026-07-12T06:00:00.000Z	28 \| good	5.444 \| good	10.704 \| good	30.282 \| good	0.108 \| good	1.252 \| good	0.088 \| good
2026-07-12T07:00:00.000Z	33 \| good	5.9 \| good	11.114 \| good	31.311 \| good	0.128 \| good	1.321 \| good	0.094 \| good
2026-07-12T08:00:00.000Z	33 \| good	6.121 \| good	11.334 \| good	32.045 \| good	0.137 \| good	1.284 \| good	0.096 \| good
2026-07-12T09:00:00.000Z	33 \| good	6.122 \| good	11.693 \| good	34.196 \| good	0.14 \| good	1.277 \| good	0.096 \| good
2026-07-12T10:00:00.000Z	34 \| good	6.236 \| good	11.974 \| good	37.36 \| good	0.149 \| good	1.151 \| good	0.097 \| good
2026-07-12T11:00:00.000Z	38 \| good	6.146 \| good	12.176 \| good	41.183 \| good	0.153 \| good	1.023 \| good	0.097 \| good
2026-07-12T12:00:00.000Z	42 \| good	5.843 \| good	11.614 \| good	44.713 \| good	0.145 \| good	0.958 \| good	0.097 \| good
2026-07-12T13:00:00.000Z	44 \| good	5.755 \| good	11.216 \| good	47.591 \| good	0.138 \| good	0.943 \| good	0.096 \| good
2026-07-12T14:00:00.000Z	44 \| good	5.542 \| good	11.019 \| good	48.43 \| good	0.128 \| good	0.878 \| good	0.096 \| 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)

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Air quality in nearby cities

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Air quality levels in UK

Frequently asked questions

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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?