What is the current concentration of PM10 in Hertfordshire, UK?

The current PM10 concentration at Hertfordshire, UK is 14.817 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Hertfordshire, UK is 0.825 ppb.

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

The current ozone (O3) concentration at Hertfordshire, UK is 35.617 ppm.

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

The current nitrogen dioxide (NO2) concentration at Hertfordshire, UK is 5.864 ppb.

Live air quality index in Hertfordshire, UK today

Name: Live air pollution levels in Hertfordshire, UK today
Creator: Ambee

Stay updated with real-time air quality in Hertfordshire, UK 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

Hertfordshire, UK

Last updated: ... (Local time)

Major air pollutants in Hertfordshire, UK

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

6.32 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.82 μg/m³

155

255

425

605+

Ozone (O₃)

35.62 ppb

201

201+

Sulfur Dioxide (SO₂)

0.82 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.86 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.24 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Hertfordshire, UK

Get Live Pollen Counts

Hertfordshire, UK

Scroll To Air Quality Map

Track live Hertfordshire, UK air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-13T17:00:00.000Z	49 \| good	8.654 \| good	22.225 \| good	34.402 \| good	0.974 \| good	8.95 \| good	0.282 \| good
2025-06-13T18:00:00.000Z	44 \| good	8.156 \| good	23.193 \| good	34.9 \| good	1.058 \| good	6.294 \| good	0.291 \| good
2025-06-13T19:00:00.000Z	44 \| good	7.502 \| good	19.954 \| good	32.689 \| good	1.074 \| good	9.181 \| good	0.284 \| good
2025-06-13T20:00:00.000Z	44 \| good	7.965 \| good	23.063 \| good	32.138 \| good	0.891 \| good	6.469 \| good	0.33 \| good
2025-06-13T21:00:00.000Z	40 \| good	6.746 \| good	30.2 \| good	42.67 \| good	0.813 \| good	10.492 \| good	0.289 \| good
2025-06-13T22:00:00.000Z	36 \| good	5.412 \| good	15.989 \| good	39.087 \| good	0.835 \| good	10.467 \| good	0.276 \| good
2025-06-13T23:00:00.000Z	52 \| moderate	10.386 \| good	15.713 \| good	35.284 \| good	0.908 \| good	8.872 \| good	0.264 \| good
2025-06-14T00:00:00.000Z	49 \| good	8.711 \| good	16.101 \| good	34.292 \| good	0.808 \| good	7.976 \| good	0.275 \| good
2025-06-14T01:00:00.000Z	49 \| good	9.059 \| good	17.211 \| good	29.495 \| good	0.837 \| good	8.741 \| good	0.246 \| good
2025-06-14T02:00:00.000Z	49 \| good	8.808 \| good	16.842 \| good	33.934 \| good	0.764 \| good	8.982 \| good	0.249 \| good
2025-06-14T03:00:00.000Z	49 \| good	8.576 \| good	12.805 \| good	26.855 \| good	0.843 \| good	6.293 \| good	0.247 \| good
2025-06-14T04:00:00.000Z	49 \| good	8.592 \| good	24.201 \| good	30.08 \| good	0.843 \| good	4.693 \| good	0.266 \| good
2025-06-14T05:00:00.000Z	49 \| good	8.575 \| good	23.377 \| good	26.661 \| good	0.974 \| good	5.017 \| good	0.268 \| good
2025-06-14T06:00:00.000Z	49 \| good	8.872 \| good	19.232 \| good	32.526 \| good	0.93 \| good	6.197 \| good	0.279 \| good
2025-06-14T07:00:00.000Z	38 \| good	6.851 \| good	21.1 \| good	38.065 \| good	0.933 \| good	6.507 \| good	0.254 \| good
2025-06-14T08:00:00.000Z	58 \| moderate	11.24 \| good	68.598 \| fine	32.109 \| good	0.919 \| good	7.824 \| good	0.283 \| good
2025-06-14T09:00:00.000Z	52 \| moderate	9.98 \| good	21.716 \| good	25.5 \| good	0.941 \| good	7.351 \| good	0.283 \| good
2025-06-14T10:00:00.000Z	49 \| good	9.2 \| good	17.932 \| good	28.91 \| good	0.774 \| good	6.214 \| good	0.261 \| good
2025-06-14T11:00:00.000Z	38 \| good	6.944 \| good	17.898 \| good	29.886 \| good	0.94 \| good	4.396 \| good	0.254 \| good
2025-06-14T12:00:00.000Z	54 \| moderate	11.264 \| good	18.458 \| good	28.545 \| good	0.892 \| good	5.733 \| good	0.24 \| good
2025-06-14T13:00:00.000Z	38 \| good	6.567 \| good	19.092 \| good	34.017 \| good	0.892 \| good	3.951 \| good	0.24 \| good
2025-06-14T14:00:00.000Z	38 \| good	7.132 \| good	17.516 \| good	32.38 \| good	0.891 \| good	8.266 \| good	0.24 \| good
2025-06-14T15:00:00.000Z	54 \| moderate	11.25 \| good	18.452 \| good	39.166 \| good	0.892 \| good	8.325 \| good	0.271 \| good
2025-06-14T16:00:00.000Z	54 \| moderate	11.237 \| good	18.62 \| good	38.205 \| good	0.889 \| good	4.813 \| good	0.238 \| good
2025-06-14T17:00:00.000Z	36 \| good	5.774 \| good	23.271 \| good	39.372 \| good	0.881 \| good	4.868 \| good	0.259 \| good
2025-06-14T18:00:00.000Z	39 \| good	5.477 \| good	22.831 \| good	41.989 \| good	0.928 \| good	6.824 \| good	0.253 \| good
2025-06-14T19:00:00.000Z	44 \| good	7.72 \| good	20.979 \| good	42.553 \| good	0.93 \| good	6.018 \| good	0.258 \| good
2025-06-14T20:00:00.000Z	44 \| good	7.603 \| good	21.465 \| good	40.044 \| good	0.935 \| good	4.881 \| good	0.309 \| good
2025-06-14T21:00:00.000Z	54 \| moderate	11.241 \| good	17.793 \| good	32.847 \| good	0.883 \| good	5.788 \| good	0.318 \| good
2025-06-14T22:00:00.000Z	54 \| moderate	10.935 \| good	16.967 \| good	32.235 \| good	0.933 \| good	4.411 \| good	0.299 \| good
2025-06-14T23:00:00.000Z	49 \| good	9.147 \| good	16.75 \| good	33.895 \| good	1.046 \| good	5.724 \| good	0.269 \| good
2025-06-15T00:00:00.000Z	44 \| good	7.926 \| good	17.431 \| good	39.464 \| good	0.766 \| good	5.934 \| good	0.268 \| good
2025-06-15T01:00:00.000Z	44 \| good	7.543 \| good	17.234 \| good	39.456 \| good	0.77 \| good	5.66 \| good	0.308 \| good
2025-06-15T02:00:00.000Z	33 \| good	6.365 \| good	15.5 \| good	35.48 \| good	0.773 \| good	5.429 \| good	0.24 \| good
2025-06-15T03:00:00.000Z	33 \| good	6.468 \| good	15.229 \| good	32.288 \| good	0.839 \| good	4.272 \| good	0.237 \| good
2025-06-15T04:00:00.000Z	33 \| good	6.023 \| good	15.61 \| good	32.64 \| good	0.622 \| good	4.695 \| good	0.235 \| good
2025-06-15T05:00:00.000Z	44 \| good	7.654 \| good	16.081 \| good	30.141 \| good	0.821 \| good	4.177 \| good	0.24 \| good
2025-06-15T06:00:00.000Z	38 \| good	6.514 \| good	23.798 \| good	33.238 \| good	0.957 \| good	4.28 \| good	0.249 \| good
2025-06-15T07:00:00.000Z	44 \| good	7.88 \| good	25.767 \| good	33.221 \| good	0.919 \| good	4.879 \| good	0.238 \| good
2025-06-15T08:00:00.000Z	29 \| good	5.468 \| good	12.417 \| good	30.881 \| good	0.865 \| good	4.079 \| good	0.243 \| good
2025-06-15T09:00:00.000Z	44 \| good	7.942 \| good	10.986 \| good	24.561 \| good	0.94 \| good	4.828 \| good	0.23 \| good
2025-06-15T10:00:00.000Z	44 \| good	8.318 \| good	13.501 \| good	28.155 \| good	0.936 \| good	4.053 \| good	0.232 \| good
2025-06-15T11:00:00.000Z	33 \| good	6.003 \| good	14.261 \| good	26.141 \| good	0.977 \| good	5.707 \| good	0.232 \| good
2025-06-15T12:00:00.000Z	33 \| good	5.65 \| good	15.174 \| good	28.763 \| good	0.941 \| good	5.795 \| good	0.232 \| good
2025-06-15T13:00:00.000Z	38 \| good	6.756 \| good	13.453 \| good	31.757 \| good	0.845 \| good	6.071 \| good	0.232 \| good
2025-06-15T14:00:00.000Z	38 \| good	6.605 \| good	13.667 \| good	33.108 \| good	0.845 \| good	6.471 \| good	0.235 \| good
2025-06-15T15:00:00.000Z	33 \| good	5.606 \| good	14.489 \| good	35.663 \| good	0.837 \| good	6.203 \| good	0.235 \| good
2025-06-15T16:00:00.000Z	33 \| good	6.316 \| good	14.817 \| good	35.617 \| good	0.825 \| good	5.864 \| good	0.237 \| good
2025-06-15T17:00:00.000Z	36 \| good	3.633 \| good	4.719 \| good	38.938 \| good	0.08 \| good	1.087 \| good	0.152 \| good
2025-06-15T18:00:00.000Z	36 \| good	3.364 \| good	5.646 \| good	39.17 \| good	0.096 \| good	1.211 \| good	0.154 \| good
2025-06-15T19:00:00.000Z	35 \| good	3.146 \| good	5.642 \| good	37.8 \| good	0.117 \| good	1.52 \| good	0.154 \| good
2025-06-15T20:00:00.000Z	30 \| good	3.256 \| good	4.63 \| good	31.937 \| good	0.157 \| good	2.135 \| good	0.152 \| good
2025-06-15T21:00:00.000Z	25 \| good	3.458 \| good	5.797 \| good	26.931 \| good	0.216 \| good	2.673 \| good	0.151 \| good
2025-06-15T22:00:00.000Z	22 \| good	4.073 \| good	6.688 \| good	23.581 \| good	0.207 \| good	3.194 \| good	0.153 \| good
2025-06-15T23:00:00.000Z	27 \| good	4.955 \| good	7.459 \| good	21.546 \| good	0.173 \| good	3.205 \| good	0.148 \| good
2025-06-16T00:00:00.000Z	27 \| good	5.114 \| good	7.656 \| good	21.093 \| good	0.147 \| good	3.37 \| good	0.148 \| good
2025-06-16T01:00:00.000Z	27 \| good	4.914 \| good	7.676 \| good	21.577 \| good	0.136 \| good	3.215 \| good	0.148 \| good
2025-06-16T02:00:00.000Z	27 \| good	4.609 \| good	7.663 \| good	21.298 \| good	0.121 \| good	3.231 \| good	0.147 \| good
2025-06-16T03:00:00.000Z	27 \| good	4.538 \| good	7.85 \| good	19.596 \| good	0.12 \| good	3.127 \| good	0.145 \| good
2025-06-16T04:00:00.000Z	27 \| good	4.651 \| good	7.781 \| good	18.626 \| good	0.121 \| good	3.214 \| good	0.142 \| good
2025-06-16T05:00:00.000Z	27 \| good	5.003 \| good	7.853 \| good	19.678 \| good	0.163 \| good	3.178 \| good	0.139 \| good
2025-06-16T06:00:00.000Z	33 \| good	5.632 \| good	7.625 \| good	19.654 \| good	0.177 \| good	2.954 \| good	0.139 \| good
2025-06-16T07:00:00.000Z	27 \| good	5.164 \| good	7.943 \| good	23.759 \| good	0.24 \| good	3.091 \| good	0.14 \| good
2025-06-16T08:00:00.000Z	29 \| good	4.903 \| good	7.057 \| good	31.194 \| good	0.199 \| good	2.687 \| good	0.136 \| good
2025-06-16T09:00:00.000Z	31 \| good	4.616 \| good	6.401 \| good	32.877 \| good	0.206 \| good	2.181 \| good	0.131 \| good
2025-06-16T10:00:00.000Z	33 \| good	4.402 \| good	6.419 \| good	35.977 \| good	0.214 \| good	1.947 \| good	0.128 \| good
2025-06-16T11:00:00.000Z	38 \| good	4.464 \| good	6.111 \| good	40.587 \| good	0.185 \| good	1.624 \| good	0.132 \| good
2025-06-16T12:00:00.000Z	42 \| good	4.474 \| good	6.051 \| good	45.206 \| good	0.155 \| good	1.512 \| good	0.133 \| good
2025-06-16T13:00:00.000Z	44 \| good	4.399 \| good	5.983 \| good	47.367 \| good	0.136 \| good	1.513 \| good	0.134 \| good
2025-06-16T14:00:00.000Z	44 \| good	4.35 \| good	5.898 \| good	47.988 \| good	0.123 \| good	1.566 \| good	0.134 \| good
2025-06-16T15:00:00.000Z	44 \| good	4.442 \| good	5.847 \| good	47.583 \| good	0.123 \| good	1.701 \| good	0.135 \| good
2025-06-16T16:00:00.000Z	43 \| good	4.718 \| good	6.127 \| good	46.066 \| good	0.131 \| good	2.103 \| good	0.137 \| good
2025-06-16T17:00:00.000Z	43 \| good	4.875 \| good	7.25 \| good	45.645 \| good	0.142 \| good	2.388 \| good	0.138 \| good
2025-06-16T18:00:00.000Z	42 \| good	5.153 \| good	7.876 \| good	45.308 \| good	0.157 \| good	2.509 \| good	0.14 \| good
2025-06-16T19:00:00.000Z	38 \| good	5.505 \| good	8.349 \| good	41.342 \| good	0.252 \| good	2.756 \| good	0.147 \| good
2025-06-16T20:00:00.000Z	37 \| good	5.636 \| good	8.868 \| good	39.688 \| good	0.305 \| good	4.262 \| good	0.154 \| good
2025-06-16T21:00:00.000Z	34 \| good	6.177 \| good	9.24 \| good	36.836 \| good	0.372 \| good	6.097 \| good	0.16 \| good
2025-06-16T22:00:00.000Z	38 \| good	7.042 \| good	9.704 \| good	30.021 \| good	0.366 \| good	6.968 \| good	0.165 \| good
2025-06-16T23:00:00.000Z	38 \| good	7.456 \| good	10.625 \| good	26.759 \| good	0.29 \| good	6.138 \| good	0.165 \| good
2025-06-17T00:00:00.000Z	44 \| good	8.104 \| good	11.44 \| good	26.666 \| good	0.23 \| good	4.811 \| good	0.165 \| good
2025-06-17T01:00:00.000Z	49 \| good	9.156 \| good	12.134 \| good	26.627 \| good	0.19 \| good	4.093 \| good	0.166 \| good
2025-06-17T02:00:00.000Z	52 \| moderate	10.061 \| good	13.307 \| good	25.126 \| good	0.187 \| good	3.776 \| good	0.167 \| good
2025-06-17T03:00:00.000Z	54 \| moderate	10.953 \| good	14.742 \| good	23.734 \| good	0.218 \| good	3.717 \| good	0.17 \| good
2025-06-17T04:00:00.000Z	56 \| moderate	11.749 \| good	15.416 \| good	22.555 \| good	0.232 \| good	3.572 \| good	0.171 \| good
2025-06-17T05:00:00.000Z	56 \| moderate	11.901 \| good	15.805 \| good	21.719 \| good	0.25 \| good	3.137 \| good	0.171 \| good
2025-06-17T06:00:00.000Z	56 \| moderate	11.57 \| good	16.503 \| good	23.003 \| good	0.253 \| good	3.115 \| good	0.171 \| good
2025-06-17T07:00:00.000Z	54 \| moderate	11.475 \| good	15.601 \| good	27.924 \| good	0.254 \| good	3.677 \| good	0.169 \| good
2025-06-17T08:00:00.000Z	52 \| moderate	10.311 \| good	14.481 \| good	30.767 \| good	0.237 \| good	3.035 \| good	0.17 \| good
2025-06-17T09:00:00.000Z	54 \| moderate	10.564 \| good	12.646 \| good	33.889 \| good	0.203 \| good	2.71 \| good	0.167 \| good
2025-06-17T10:00:00.000Z	52 \| moderate	9.942 \| good	11.733 \| good	38.351 \| good	0.183 \| good	2.219 \| good	0.164 \| good
2025-06-17T11:00:00.000Z	49 \| good	8.816 \| good	11.439 \| good	43.923 \| good	0.157 \| good	1.921 \| good	0.161 \| good
2025-06-17T12:00:00.000Z	49 \| good	8.871 \| good	11.208 \| good	47.645 \| good	0.142 \| good	1.549 \| good	0.159 \| good
2025-06-17T13:00:00.000Z	49 \| good	8.768 \| good	10.547 \| good	50.055 \| good	0.143 \| good	1.384 \| good	0.158 \| good
2025-06-17T14:00:00.000Z	49 \| good	8.722 \| good	10.096 \| good	50.855 \| good	0.152 \| good	1.403 \| good	0.161 \| good
2025-06-17T15:00:00.000Z	49 \| good	8.526 \| good	9.725 \| good	51.028 \| good	0.148 \| good	1.511 \| good	0.161 \| good
2025-06-17T16:00:00.000Z	45 \| good	8.191 \| good	9.421 \| good	48.769 \| good	0.135 \| good	1.699 \| good	0.158 \| good

Hertfordshire

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Hertfordshire, UK air quality map: Track AQI near you

Air quality in cities of Hertfordshire, UK

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
Hemel Hempstead, Hertfordshire	54 Moderate	10.82μg/m³ Good	23.09μg/m³ Good	34.32ppb Good	0.88ppb Good	5.85ppb Good	0.29ppm Good
Abbots Langley, Hertfordshire	54 Moderate	10.82μg/m³ Good	23.09μg/m³ Good	34.32ppb Good	0.88ppb Good	5.85ppb Good	0.29ppm Good
Baldock, Hertfordshire	54 Moderate	10.82μg/m³ Good	23.92μg/m³ Good	34.68ppb Good	0.80ppb Good	5.56ppb Good	0.29ppm Good
Letchworth, Hertfordshire	54 Moderate	10.82μg/m³ Good	27.04μg/m³ Good	34.58ppb Good	0.82ppb Good	6.89ppb Good	0.29ppm Good
Stevenage, Hertfordshire	54 Moderate	10.82μg/m³ Good	27.04μg/m³ Good	34.58ppb Good	0.82ppb Good	6.89ppb Good	0.29ppm Good
Royston, Hertfordshire	54 Moderate	10.82μg/m³ Good	25.31μg/m³ Good	34.64ppb Good	0.75ppb Good	5.23ppb Good	0.29ppm Good
Hitchin, Hertfordshire	54 Moderate	10.82μg/m³ Good	27.04μg/m³ Good	34.58ppb Good	0.82ppb Good	6.89ppb Good	0.29ppm Good
Welwyn Garden City, Hertfordshire	54 Moderate	10.82μg/m³ Good	27.13μg/m³ Good	36.03ppb Good	0.84ppb Good	5.79ppb Good	0.29ppm Good
Ware, Hertfordshire	54 Moderate	10.82μg/m³ Good	20.07μg/m³ Good	33.23ppb Good	0.82ppb Good	7.50ppb Good	0.29ppm Good
Borehamwood, Hertfordshire	54 Moderate	10.52μg/m³ Good	18.76μg/m³ Good	36.83ppb Good	0.93ppb Good	7.82ppb Good	0.29ppm Good
St Albans, Hertfordshire	52 Moderate	9.79μg/m³ Good	23.91μg/m³ Good	34.79ppb Good	0.94ppb Good	13.46ppb Good	0.29ppm Good
Berkhamsted, Hertfordshire	49 Good	9.28μg/m³ Good	23.04μg/m³ Good	34.41ppb Good	0.79ppb Good	4.25ppb Good	0.29ppm Good
Harpenden, Hertfordshire	49 Good	9.03μg/m³ Good	22.11μg/m³ Good	34.64ppb Good	0.86ppb Good	7.51ppb Good	0.29ppm Good
Potters Bar, Hertfordshire	49 Good	9.07μg/m³ Good	17.92μg/m³ Good	33.55ppb Good	0.98ppb Good	8.82ppb Good	0.29ppm Good
Chorleywood, Hertfordshire	49 Good	8.66μg/m³ Good	14.56μg/m³ Good	36.42ppb Good	0.84ppb Good	6.48ppb Good	0.29ppm Good
Bushey, Hertfordshire	49 Good	8.77μg/m³ Good	20.37μg/m³ Good	36.73ppb Good	0.96ppb Good	18.78ppb Good	0.29ppm Good
Rickmansworth, Hertfordshire	49 Good	8.66μg/m³ Good	14.56μg/m³ Good	36.42ppb Good	0.84ppb Good	6.48ppb Good	0.29ppm Good
Tring, Hertfordshire	49 Good	8.76μg/m³ Good	32.44μg/m³ Good	34.69ppb Good	0.77ppb Good	6.11ppb Good	0.29ppm Good
Hertford, Hertfordshire	44 Good	7.76μg/m³ Good	22.21μg/m³ Good	34.90ppb Good	0.87ppb Good	6.24ppb Good	0.29ppm Good
Bishop's Stortford, Hertfordshire	44 Good	7.90μg/m³ Good	21.77μg/m³ Good	32.35ppb Good	0.78ppb Good	7.16ppb Good	0.29ppm Good
Sawbridgeworth, Hertfordshire	44 Good	7.90μg/m³ Good	21.77μg/m³ Good	32.35ppb Good	0.78ppb Good	7.16ppb Good	0.29ppm Good
Waltham Cross, Hertfordshire	44 Good	7.83μg/m³ Good	29.45μg/m³ Good	32.65ppb Good	0.95ppb Good	21.14ppb Good	0.29ppm Good
Watford, Hertfordshire	44 Good	7.81μg/m³ Good	24.61μg/m³ Good	35.19ppb Good	0.91ppb Good	7.68ppb Good	0.29ppm Good
Cheshunt, Hertfordshire	44 Good	7.72μg/m³ Good	28.97μg/m³ Good	32.05ppb Good	0.95ppb Good	20.27ppb Good	0.29ppm Good
Hoddesdon, Hertfordshire	44 Good	7.61μg/m³ Good	28.46μg/m³ Good	31.43ppb Good	0.96ppb Good	21.18ppb Good	0.29ppm Good
Hatfield, Hertfordshire	31 Good	4.45μg/m³ Good	25.42μg/m³ Good	34.46ppb Good	0.87ppb Good	8.21ppb Good	0.29ppm Good

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
No results found

0.23ppm

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

Air quality levels in UK

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Frequently asked questions

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

The air quality for Hertfordshire, UK is updated every hour.

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

The worst air quality in Hertfordshire, UK in the last 24 hours was observed at 10:00:00 on 2025-06-14.

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

In the last 24 hrs, the best air quality in Hertfordshire, UK was observed at 08:00:00 on 2025-06-15.

What is the current air quality in Hertfordshire, UK?

The current air quality in Hertfordshire, UK is 33, categorized as Good based on real-time data.

What pollutant is the most common in Hertfordshire, UK?

The most common pollutant in Hertfordshire, UK is O3.

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

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

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

The current PM_2.5 concentration at Hertfordshire, UK is 6.316 μg/m³.

What is the current concentration of PM₁₀ in Hertfordshire, UK?

The current PM₁₀ concentration at Hertfordshire, UK is 14.817 μg/m³.

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

The current carbon monoxide (CO) concentration at Hertfordshire, UK is 0.237 ppm.

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

The current sulfur dioxide (SO₂) concentration at Hertfordshire, UK is 0.825 ppb.

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

The current ozone (O₃) concentration at Hertfordshire, UK is 35.617 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Hertfordshire, UK is 5.864 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-13T17:00:00.000Z	49 \| good	8.654 \| good	22.225 \| good	34.402 \| good	0.974 \| good	8.95 \| good	0.282 \| good
2025-06-13T18:00:00.000Z	44 \| good	8.156 \| good	23.193 \| good	34.9 \| good	1.058 \| good	6.294 \| good	0.291 \| good
2025-06-13T19:00:00.000Z	44 \| good	7.502 \| good	19.954 \| good	32.689 \| good	1.074 \| good	9.181 \| good	0.284 \| good
2025-06-13T20:00:00.000Z	44 \| good	7.965 \| good	23.063 \| good	32.138 \| good	0.891 \| good	6.469 \| good	0.33 \| good
2025-06-13T21:00:00.000Z	40 \| good	6.746 \| good	30.2 \| good	42.67 \| good	0.813 \| good	10.492 \| good	0.289 \| good
2025-06-13T22:00:00.000Z	36 \| good	5.412 \| good	15.989 \| good	39.087 \| good	0.835 \| good	10.467 \| good	0.276 \| good
2025-06-13T23:00:00.000Z	52 \| moderate	10.386 \| good	15.713 \| good	35.284 \| good	0.908 \| good	8.872 \| good	0.264 \| good
2025-06-14T00:00:00.000Z	49 \| good	8.711 \| good	16.101 \| good	34.292 \| good	0.808 \| good	7.976 \| good	0.275 \| good
2025-06-14T01:00:00.000Z	49 \| good	9.059 \| good	17.211 \| good	29.495 \| good	0.837 \| good	8.741 \| good	0.246 \| good
2025-06-14T02:00:00.000Z	49 \| good	8.808 \| good	16.842 \| good	33.934 \| good	0.764 \| good	8.982 \| good	0.249 \| good
2025-06-14T03:00:00.000Z	49 \| good	8.576 \| good	12.805 \| good	26.855 \| good	0.843 \| good	6.293 \| good	0.247 \| good
2025-06-14T04:00:00.000Z	49 \| good	8.592 \| good	24.201 \| good	30.08 \| good	0.843 \| good	4.693 \| good	0.266 \| good
2025-06-14T05:00:00.000Z	49 \| good	8.575 \| good	23.377 \| good	26.661 \| good	0.974 \| good	5.017 \| good	0.268 \| good
2025-06-14T06:00:00.000Z	49 \| good	8.872 \| good	19.232 \| good	32.526 \| good	0.93 \| good	6.197 \| good	0.279 \| good
2025-06-14T07:00:00.000Z	38 \| good	6.851 \| good	21.1 \| good	38.065 \| good	0.933 \| good	6.507 \| good	0.254 \| good
2025-06-14T08:00:00.000Z	58 \| moderate	11.24 \| good	68.598 \| fine	32.109 \| good	0.919 \| good	7.824 \| good	0.283 \| good
2025-06-14T09:00:00.000Z	52 \| moderate	9.98 \| good	21.716 \| good	25.5 \| good	0.941 \| good	7.351 \| good	0.283 \| good
2025-06-14T10:00:00.000Z	49 \| good	9.2 \| good	17.932 \| good	28.91 \| good	0.774 \| good	6.214 \| good	0.261 \| good
2025-06-14T11:00:00.000Z	38 \| good	6.944 \| good	17.898 \| good	29.886 \| good	0.94 \| good	4.396 \| good	0.254 \| good
2025-06-14T12:00:00.000Z	54 \| moderate	11.264 \| good	18.458 \| good	28.545 \| good	0.892 \| good	5.733 \| good	0.24 \| good
2025-06-14T13:00:00.000Z	38 \| good	6.567 \| good	19.092 \| good	34.017 \| good	0.892 \| good	3.951 \| good	0.24 \| good
2025-06-14T14:00:00.000Z	38 \| good	7.132 \| good	17.516 \| good	32.38 \| good	0.891 \| good	8.266 \| good	0.24 \| good
2025-06-14T15:00:00.000Z	54 \| moderate	11.25 \| good	18.452 \| good	39.166 \| good	0.892 \| good	8.325 \| good	0.271 \| good
2025-06-14T16:00:00.000Z	54 \| moderate	11.237 \| good	18.62 \| good	38.205 \| good	0.889 \| good	4.813 \| good	0.238 \| good
2025-06-14T17:00:00.000Z	36 \| good	5.774 \| good	23.271 \| good	39.372 \| good	0.881 \| good	4.868 \| good	0.259 \| good
2025-06-14T18:00:00.000Z	39 \| good	5.477 \| good	22.831 \| good	41.989 \| good	0.928 \| good	6.824 \| good	0.253 \| good
2025-06-14T19:00:00.000Z	44 \| good	7.72 \| good	20.979 \| good	42.553 \| good	0.93 \| good	6.018 \| good	0.258 \| good
2025-06-14T20:00:00.000Z	44 \| good	7.603 \| good	21.465 \| good	40.044 \| good	0.935 \| good	4.881 \| good	0.309 \| good
2025-06-14T21:00:00.000Z	54 \| moderate	11.241 \| good	17.793 \| good	32.847 \| good	0.883 \| good	5.788 \| good	0.318 \| good
2025-06-14T22:00:00.000Z	54 \| moderate	10.935 \| good	16.967 \| good	32.235 \| good	0.933 \| good	4.411 \| good	0.299 \| good
2025-06-14T23:00:00.000Z	49 \| good	9.147 \| good	16.75 \| good	33.895 \| good	1.046 \| good	5.724 \| good	0.269 \| good
2025-06-15T00:00:00.000Z	44 \| good	7.926 \| good	17.431 \| good	39.464 \| good	0.766 \| good	5.934 \| good	0.268 \| good
2025-06-15T01:00:00.000Z	44 \| good	7.543 \| good	17.234 \| good	39.456 \| good	0.77 \| good	5.66 \| good	0.308 \| good
2025-06-15T02:00:00.000Z	33 \| good	6.365 \| good	15.5 \| good	35.48 \| good	0.773 \| good	5.429 \| good	0.24 \| good
2025-06-15T03:00:00.000Z	33 \| good	6.468 \| good	15.229 \| good	32.288 \| good	0.839 \| good	4.272 \| good	0.237 \| good
2025-06-15T04:00:00.000Z	33 \| good	6.023 \| good	15.61 \| good	32.64 \| good	0.622 \| good	4.695 \| good	0.235 \| good
2025-06-15T05:00:00.000Z	44 \| good	7.654 \| good	16.081 \| good	30.141 \| good	0.821 \| good	4.177 \| good	0.24 \| good
2025-06-15T06:00:00.000Z	38 \| good	6.514 \| good	23.798 \| good	33.238 \| good	0.957 \| good	4.28 \| good	0.249 \| good
2025-06-15T07:00:00.000Z	44 \| good	7.88 \| good	25.767 \| good	33.221 \| good	0.919 \| good	4.879 \| good	0.238 \| good
2025-06-15T08:00:00.000Z	29 \| good	5.468 \| good	12.417 \| good	30.881 \| good	0.865 \| good	4.079 \| good	0.243 \| good
2025-06-15T09:00:00.000Z	44 \| good	7.942 \| good	10.986 \| good	24.561 \| good	0.94 \| good	4.828 \| good	0.23 \| good
2025-06-15T10:00:00.000Z	44 \| good	8.318 \| good	13.501 \| good	28.155 \| good	0.936 \| good	4.053 \| good	0.232 \| good
2025-06-15T11:00:00.000Z	33 \| good	6.003 \| good	14.261 \| good	26.141 \| good	0.977 \| good	5.707 \| good	0.232 \| good
2025-06-15T12:00:00.000Z	33 \| good	5.65 \| good	15.174 \| good	28.763 \| good	0.941 \| good	5.795 \| good	0.232 \| good
2025-06-15T13:00:00.000Z	38 \| good	6.756 \| good	13.453 \| good	31.757 \| good	0.845 \| good	6.071 \| good	0.232 \| good
2025-06-15T14:00:00.000Z	38 \| good	6.605 \| good	13.667 \| good	33.108 \| good	0.845 \| good	6.471 \| good	0.235 \| good
2025-06-15T15:00:00.000Z	33 \| good	5.606 \| good	14.489 \| good	35.663 \| good	0.837 \| good	6.203 \| good	0.235 \| good
2025-06-15T16:00:00.000Z	33 \| good	6.316 \| good	14.817 \| good	35.617 \| good	0.825 \| good	5.864 \| good	0.237 \| good
2025-06-15T17:00:00.000Z	36 \| good	3.633 \| good	4.719 \| good	38.938 \| good	0.08 \| good	1.087 \| good	0.152 \| good
2025-06-15T18:00:00.000Z	36 \| good	3.364 \| good	5.646 \| good	39.17 \| good	0.096 \| good	1.211 \| good	0.154 \| good
2025-06-15T19:00:00.000Z	35 \| good	3.146 \| good	5.642 \| good	37.8 \| good	0.117 \| good	1.52 \| good	0.154 \| good
2025-06-15T20:00:00.000Z	30 \| good	3.256 \| good	4.63 \| good	31.937 \| good	0.157 \| good	2.135 \| good	0.152 \| good
2025-06-15T21:00:00.000Z	25 \| good	3.458 \| good	5.797 \| good	26.931 \| good	0.216 \| good	2.673 \| good	0.151 \| good
2025-06-15T22:00:00.000Z	22 \| good	4.073 \| good	6.688 \| good	23.581 \| good	0.207 \| good	3.194 \| good	0.153 \| good
2025-06-15T23:00:00.000Z	27 \| good	4.955 \| good	7.459 \| good	21.546 \| good	0.173 \| good	3.205 \| good	0.148 \| good
2025-06-16T00:00:00.000Z	27 \| good	5.114 \| good	7.656 \| good	21.093 \| good	0.147 \| good	3.37 \| good	0.148 \| good
2025-06-16T01:00:00.000Z	27 \| good	4.914 \| good	7.676 \| good	21.577 \| good	0.136 \| good	3.215 \| good	0.148 \| good
2025-06-16T02:00:00.000Z	27 \| good	4.609 \| good	7.663 \| good	21.298 \| good	0.121 \| good	3.231 \| good	0.147 \| good
2025-06-16T03:00:00.000Z	27 \| good	4.538 \| good	7.85 \| good	19.596 \| good	0.12 \| good	3.127 \| good	0.145 \| good
2025-06-16T04:00:00.000Z	27 \| good	4.651 \| good	7.781 \| good	18.626 \| good	0.121 \| good	3.214 \| good	0.142 \| good
2025-06-16T05:00:00.000Z	27 \| good	5.003 \| good	7.853 \| good	19.678 \| good	0.163 \| good	3.178 \| good	0.139 \| good
2025-06-16T06:00:00.000Z	33 \| good	5.632 \| good	7.625 \| good	19.654 \| good	0.177 \| good	2.954 \| good	0.139 \| good
2025-06-16T07:00:00.000Z	27 \| good	5.164 \| good	7.943 \| good	23.759 \| good	0.24 \| good	3.091 \| good	0.14 \| good
2025-06-16T08:00:00.000Z	29 \| good	4.903 \| good	7.057 \| good	31.194 \| good	0.199 \| good	2.687 \| good	0.136 \| good
2025-06-16T09:00:00.000Z	31 \| good	4.616 \| good	6.401 \| good	32.877 \| good	0.206 \| good	2.181 \| good	0.131 \| good
2025-06-16T10:00:00.000Z	33 \| good	4.402 \| good	6.419 \| good	35.977 \| good	0.214 \| good	1.947 \| good	0.128 \| good
2025-06-16T11:00:00.000Z	38 \| good	4.464 \| good	6.111 \| good	40.587 \| good	0.185 \| good	1.624 \| good	0.132 \| good
2025-06-16T12:00:00.000Z	42 \| good	4.474 \| good	6.051 \| good	45.206 \| good	0.155 \| good	1.512 \| good	0.133 \| good
2025-06-16T13:00:00.000Z	44 \| good	4.399 \| good	5.983 \| good	47.367 \| good	0.136 \| good	1.513 \| good	0.134 \| good
2025-06-16T14:00:00.000Z	44 \| good	4.35 \| good	5.898 \| good	47.988 \| good	0.123 \| good	1.566 \| good	0.134 \| good
2025-06-16T15:00:00.000Z	44 \| good	4.442 \| good	5.847 \| good	47.583 \| good	0.123 \| good	1.701 \| good	0.135 \| good
2025-06-16T16:00:00.000Z	43 \| good	4.718 \| good	6.127 \| good	46.066 \| good	0.131 \| good	2.103 \| good	0.137 \| good
2025-06-16T17:00:00.000Z	43 \| good	4.875 \| good	7.25 \| good	45.645 \| good	0.142 \| good	2.388 \| good	0.138 \| good
2025-06-16T18:00:00.000Z	42 \| good	5.153 \| good	7.876 \| good	45.308 \| good	0.157 \| good	2.509 \| good	0.14 \| good
2025-06-16T19:00:00.000Z	38 \| good	5.505 \| good	8.349 \| good	41.342 \| good	0.252 \| good	2.756 \| good	0.147 \| good
2025-06-16T20:00:00.000Z	37 \| good	5.636 \| good	8.868 \| good	39.688 \| good	0.305 \| good	4.262 \| good	0.154 \| good
2025-06-16T21:00:00.000Z	34 \| good	6.177 \| good	9.24 \| good	36.836 \| good	0.372 \| good	6.097 \| good	0.16 \| good
2025-06-16T22:00:00.000Z	38 \| good	7.042 \| good	9.704 \| good	30.021 \| good	0.366 \| good	6.968 \| good	0.165 \| good
2025-06-16T23:00:00.000Z	38 \| good	7.456 \| good	10.625 \| good	26.759 \| good	0.29 \| good	6.138 \| good	0.165 \| good
2025-06-17T00:00:00.000Z	44 \| good	8.104 \| good	11.44 \| good	26.666 \| good	0.23 \| good	4.811 \| good	0.165 \| good
2025-06-17T01:00:00.000Z	49 \| good	9.156 \| good	12.134 \| good	26.627 \| good	0.19 \| good	4.093 \| good	0.166 \| good
2025-06-17T02:00:00.000Z	52 \| moderate	10.061 \| good	13.307 \| good	25.126 \| good	0.187 \| good	3.776 \| good	0.167 \| good
2025-06-17T03:00:00.000Z	54 \| moderate	10.953 \| good	14.742 \| good	23.734 \| good	0.218 \| good	3.717 \| good	0.17 \| good
2025-06-17T04:00:00.000Z	56 \| moderate	11.749 \| good	15.416 \| good	22.555 \| good	0.232 \| good	3.572 \| good	0.171 \| good
2025-06-17T05:00:00.000Z	56 \| moderate	11.901 \| good	15.805 \| good	21.719 \| good	0.25 \| good	3.137 \| good	0.171 \| good
2025-06-17T06:00:00.000Z	56 \| moderate	11.57 \| good	16.503 \| good	23.003 \| good	0.253 \| good	3.115 \| good	0.171 \| good
2025-06-17T07:00:00.000Z	54 \| moderate	11.475 \| good	15.601 \| good	27.924 \| good	0.254 \| good	3.677 \| good	0.169 \| good
2025-06-17T08:00:00.000Z	52 \| moderate	10.311 \| good	14.481 \| good	30.767 \| good	0.237 \| good	3.035 \| good	0.17 \| good
2025-06-17T09:00:00.000Z	54 \| moderate	10.564 \| good	12.646 \| good	33.889 \| good	0.203 \| good	2.71 \| good	0.167 \| good
2025-06-17T10:00:00.000Z	52 \| moderate	9.942 \| good	11.733 \| good	38.351 \| good	0.183 \| good	2.219 \| good	0.164 \| good
2025-06-17T11:00:00.000Z	49 \| good	8.816 \| good	11.439 \| good	43.923 \| good	0.157 \| good	1.921 \| good	0.161 \| good
2025-06-17T12:00:00.000Z	49 \| good	8.871 \| good	11.208 \| good	47.645 \| good	0.142 \| good	1.549 \| good	0.159 \| good
2025-06-17T13:00:00.000Z	49 \| good	8.768 \| good	10.547 \| good	50.055 \| good	0.143 \| good	1.384 \| good	0.158 \| good
2025-06-17T14:00:00.000Z	49 \| good	8.722 \| good	10.096 \| good	50.855 \| good	0.152 \| good	1.403 \| good	0.161 \| good
2025-06-17T15:00:00.000Z	49 \| good	8.526 \| good	9.725 \| good	51.028 \| good	0.148 \| good	1.511 \| good	0.161 \| good
2025-06-17T16:00:00.000Z	45 \| good	8.191 \| good	9.421 \| good	48.769 \| good	0.135 \| good	1.699 \| good	0.158 \| good

Live air quality index in Hertfordshire, UK today

Major air pollutants in Hertfordshire, UK

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Hertfordshire, UK air quality forecast and history

Get reliable air quality data to drive your business

Hertfordshire, UK air quality map: Track AQI near you

Air quality in cities of Hertfordshire, UK

Air quality in nearby states

Central Bedfordshire, UK

Greater London, UK

Halton, UK

Buckinghamshire, UK

Bedford, UK

Milton Keynes, UK

How accurate is Hertfordshire, UK air quality data?

Air quality levels in UK

Frequently asked questions

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

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

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

What is the current air quality in Hertfordshire, UK?

What pollutant is the most common in Hertfordshire, UK?

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

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

What is the current concentration of PM10 in Hertfordshire, UK?

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

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

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

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

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 Hertfordshire, UK?

What is the current concentration of PM₁₀ in Hertfordshire, UK?

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

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

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