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

The current PM10 concentration at Hertfordshire, UK is 16.901 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Hertfordshire, UK is 0.465 ppb.

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

The current ozone (O3) concentration at Hertfordshire, UK is 27.171 ppm.

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

The current nitrogen dioxide (NO2) concentration at Hertfordshire, UK is 8.61 ppb.

Hertfordshire, UK live air quality index now

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

The current PM2.5 concentration at Hertfordshire, UK is 6.577 μg/m3.

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)

7.52 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

15.42 μg/m³

155

255

425

605+

Ozone (O₃)

27.16 ppb

201

201+

Sulfur Dioxide (SO₂)

0.46 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.32 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.01 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2026-02-07T00:00:00.000Z	44 \| good	8.488 \| good	19.502 \| good	20.377 \| good	0.67 \| good	12.243 \| good	0.904 \| good
2026-02-07T01:00:00.000Z	54 \| moderate	10.518 \| good	22.06 \| good	24.027 \| good	0.807 \| good	18.862 \| good	0.848 \| good
2026-02-07T02:00:00.000Z	52 \| moderate	9.876 \| good	24.278 \| good	25.248 \| good	0.713 \| good	18.33 \| good	0.807 \| good
2026-02-07T03:00:00.000Z	49 \| good	9.129 \| good	27.416 \| good	23.658 \| good	0.562 \| good	9.874 \| good	0.706 \| good
2026-02-07T04:00:00.000Z	52 \| moderate	9.638 \| good	17.6 \| good	25.176 \| good	0.562 \| good	9.62 \| good	0.605 \| good
2026-02-07T05:00:00.000Z	52 \| moderate	9.752 \| good	30.402 \| good	27.38 \| good	0.563 \| good	10.62 \| good	0.574 \| good
2026-02-07T06:00:00.000Z	52 \| moderate	9.945 \| good	31.503 \| good	27.458 \| good	0.569 \| good	10.423 \| good	0.029 \| good
2026-02-07T07:00:00.000Z	52 \| moderate	9.999 \| good	23.158 \| good	28.089 \| good	0.575 \| good	8.074 \| good	0.029 \| good
2026-02-07T08:00:00.000Z	49 \| good	8.619 \| good	21.043 \| good	30.863 \| good	0.589 \| good	8.84 \| good	0.034 \| good
2026-02-07T09:00:00.000Z	49 \| good	8.903 \| good	22.006 \| good	28.043 \| good	0.672 \| good	9.544 \| good	0.042 \| good
2026-02-07T10:00:00.000Z	54 \| moderate	10.793 \| good	20.903 \| good	27.842 \| good	0.668 \| good	9.908 \| good	0.047 \| good
2026-02-07T11:00:00.000Z	44 \| good	8.263 \| good	23.482 \| good	28.671 \| good	0.665 \| good	9.533 \| good	0.053 \| good
2026-02-07T12:00:00.000Z	44 \| good	8.272 \| good	19.908 \| good	29.115 \| good	0.561 \| good	11.418 \| good	0.026 \| good
2026-02-07T13:00:00.000Z	44 \| good	7.764 \| good	18.779 \| good	32.319 \| good	0.705 \| good	14.077 \| good	0.024 \| good
2026-02-07T14:00:00.000Z	49 \| good	9.101 \| good	16.005 \| good	31.496 \| good	0.706 \| good	12.948 \| good	0.018 \| good
2026-02-07T15:00:00.000Z	38 \| good	7.385 \| good	21.452 \| good	30.506 \| good	0.667 \| good	17.967 \| good	0.017 \| good
2026-02-07T16:00:00.000Z	49 \| good	9.143 \| good	24.299 \| good	29.921 \| good	0.571 \| good	14.418 \| good	0.022 \| good
2026-02-07T17:00:00.000Z	44 \| good	8.352 \| good	23.317 \| good	29.931 \| good	0.66 \| good	8.66 \| good	0.036 \| good
2026-02-07T18:00:00.000Z	56 \| moderate	11.965 \| good	20.992 \| good	27.514 \| good	0.663 \| good	8.254 \| good	0.04 \| good
2026-02-07T19:00:00.000Z	44 \| good	7.926 \| good	16.38 \| good	24.72 \| good	0.525 \| good	9.384 \| good	0.046 \| good
2026-02-07T20:00:00.000Z	49 \| good	8.603 \| good	29.512 \| good	29.756 \| good	0.667 \| good	11.47 \| good	0.046 \| good
2026-02-07T21:00:00.000Z	49 \| good	9.279 \| good	21.421 \| good	30.071 \| good	0.524 \| good	11.776 \| good	0.044 \| good
2026-02-07T22:00:00.000Z	54 \| moderate	10.82 \| good	18.363 \| good	29.001 \| good	0.621 \| good	9.876 \| good	0.044 \| good
2026-02-07T23:00:00.000Z	52 \| moderate	9.61 \| good	17.963 \| good	30.494 \| good	0.509 \| good	8.757 \| good	0.053 \| good
2026-02-08T00:00:00.000Z	38 \| good	6.792 \| good	25.297 \| good	22.065 \| good	0.517 \| good	15.068 \| good	0.98 \| good
2026-02-08T01:00:00.000Z	44 \| good	7.786 \| good	23.464 \| good	27.285 \| good	0.52 \| good	14.101 \| good	0.788 \| good
2026-02-08T02:00:00.000Z	49 \| good	9.22 \| good	15.652 \| good	26.541 \| good	0.518 \| good	14.817 \| good	0.819 \| good
2026-02-08T03:00:00.000Z	33 \| good	6.448 \| good	17.104 \| good	25.399 \| good	0.437 \| good	8.062 \| good	0.617 \| good
2026-02-08T04:00:00.000Z	27 \| good	5.011 \| good	19.888 \| good	23.136 \| good	0.52 \| good	7.079 \| good	0.479 \| good
2026-02-08T05:00:00.000Z	38 \| good	7.032 \| good	14.104 \| good	23.883 \| good	0.52 \| good	9.24 \| good	0.386 \| good
2026-02-08T06:00:00.000Z	44 \| good	8.281 \| good	32.8 \| good	26.159 \| good	0.494 \| good	3.935 \| good	0.007 \| good
2026-02-08T07:00:00.000Z	44 \| good	7.938 \| good	13.999 \| good	23.729 \| good	0.495 \| good	7.775 \| good	0.008 \| good
2026-02-08T08:00:00.000Z	27 \| good	5.488 \| good	12.975 \| good	22.894 \| good	0.699 \| good	8.515 \| good	0.008 \| good
2026-02-08T09:00:00.000Z	27 \| good	4.676 \| good	14.663 \| good	26.264 \| good	0.709 \| good	11.138 \| good	0.011 \| good
2026-02-08T10:00:00.000Z	27 \| good	5.34 \| good	10.773 \| good	24.89 \| good	0.498 \| good	7.145 \| good	0.009 \| good
2026-02-08T11:00:00.000Z	38 \| good	7.4 \| good	11.033 \| good	22.286 \| good	0.486 \| good	12.617 \| good	0.008 \| good
2026-02-08T12:00:00.000Z	38 \| good	7.215 \| good	19.619 \| good	22.592 \| good	0.492 \| good	10.321 \| good	0.006 \| good
2026-02-08T13:00:00.000Z	38 \| good	7.134 \| good	21.095 \| good	22.796 \| good	0.494 \| good	10.084 \| good	0.005 \| good
2026-02-08T14:00:00.000Z	38 \| good	6.871 \| good	23.102 \| good	25.065 \| good	0.418 \| good	9.848 \| good	0.006 \| good
2026-02-08T15:00:00.000Z	44 \| good	7.739 \| good	21.4 \| good	27.777 \| good	0.49 \| good	13.354 \| good	0.007 \| good
2026-02-08T16:00:00.000Z	27 \| good	5.429 \| good	21.322 \| good	27.998 \| good	0.414 \| good	10.17 \| good	0.007 \| good
2026-02-08T17:00:00.000Z	54 \| moderate	10.6 \| good	16.426 \| good	21.363 \| good	0.478 \| good	12.946 \| good	0.01 \| good
2026-02-08T18:00:00.000Z	54 \| moderate	10.79 \| good	11.519 \| good	22.591 \| good	0.48 \| good	10.059 \| good	0.01 \| good
2026-02-08T19:00:00.000Z	27 \| good	5.186 \| good	15.288 \| good	28.214 \| good	0.432 \| good	7.365 \| good	0.013 \| good
2026-02-08T20:00:00.000Z	31 \| good	4.939 \| good	33.08 \| good	22.073 \| good	0.446 \| good	7.702 \| good	0.01 \| good
2026-02-08T21:00:00.000Z	27 \| good	4.619 \| good	16.336 \| good	23.697 \| good	0.443 \| good	7.023 \| good	0.015 \| good
2026-02-08T22:00:00.000Z	44 \| good	7.937 \| good	9.219 \| good	21.244 \| good	0.428 \| good	7.121 \| good	0.017 \| good
2026-02-08T23:00:00.000Z	49 \| good	9.32 \| good	12.418 \| good	22.048 \| good	0.474 \| good	8.385 \| good	0.015 \| good
2026-02-08T23:00:00.000Z	44 \| good	7.516 \| good	15.418 \| good	27.157 \| good	0.458 \| good	9.32 \| good	0.015 \| good
2026-02-08T23:00:00.000Z	49 \| good	8.605 \| good	10.943 \| good	20.646 \| good	0.52 \| good	11.283 \| good	0.159 \| good
2026-02-09T00:00:00.000Z	44 \| good	8.411 \| good	10.145 \| good	21.503 \| good	0.464 \| good	9.719 \| good	0.156 \| good
2026-02-09T01:00:00.000Z	49 \| good	8.547 \| good	10.213 \| good	22.373 \| good	0.372 \| good	8.29 \| good	0.152 \| good
2026-02-09T02:00:00.000Z	44 \| good	8.486 \| good	10.392 \| good	22.788 \| good	0.354 \| good	6.86 \| good	0.147 \| good
2026-02-09T03:00:00.000Z	49 \| good	8.519 \| good	10.629 \| good	23.328 \| good	0.35 \| good	5.887 \| good	0.145 \| good
2026-02-09T04:00:00.000Z	49 \| good	8.888 \| good	10.983 \| good	23.41 \| good	0.343 \| good	5.377 \| good	0.143 \| good
2026-02-09T05:00:00.000Z	49 \| good	9.228 \| good	11.343 \| good	22.346 \| good	0.341 \| good	5.532 \| good	0.145 \| good
2026-02-09T06:00:00.000Z	52 \| moderate	9.695 \| good	11.93 \| good	20 \| good	0.44 \| good	6.534 \| good	0.147 \| good
2026-02-09T07:00:00.000Z	52 \| moderate	9.694 \| good	12.167 \| good	18.124 \| good	0.552 \| good	8.451 \| good	0.154 \| good
2026-02-09T08:00:00.000Z	49 \| good	8.963 \| good	12.108 \| good	16.178 \| good	0.639 \| good	11.93 \| good	0.16 \| good
2026-02-09T09:00:00.000Z	44 \| good	8.464 \| good	11.782 \| good	16.935 \| good	0.834 \| good	13.743 \| good	0.164 \| good
2026-02-09T10:00:00.000Z	44 \| good	8.193 \| good	10.778 \| good	19.458 \| good	0.841 \| good	13.332 \| good	0.167 \| good
2026-02-09T11:00:00.000Z	44 \| good	8.199 \| good	10.145 \| good	22.104 \| good	0.77 \| good	10.661 \| good	0.165 \| good
2026-02-09T12:00:00.000Z	44 \| good	7.902 \| good	10.378 \| good	24.281 \| good	0.707 \| good	8.498 \| good	0.164 \| good
2026-02-09T13:00:00.000Z	38 \| good	6.652 \| good	9.366 \| good	25.18 \| good	0.592 \| good	7.815 \| good	0.161 \| good
2026-02-09T14:00:00.000Z	38 \| good	6.598 \| good	8.75 \| good	28.653 \| good	0.51 \| good	6.281 \| good	0.158 \| good
2026-02-09T15:00:00.000Z	38 \| good	6.626 \| good	8.751 \| good	30.528 \| good	0.497 \| good	5.557 \| good	0.153 \| good
2026-02-09T16:00:00.000Z	38 \| good	7.215 \| good	9.63 \| good	30.754 \| good	0.492 \| good	6.119 \| good	0.156 \| good
2026-02-09T17:00:00.000Z	44 \| good	8.116 \| good	10.733 \| good	27.848 \| good	0.51 \| good	8.858 \| good	0.165 \| good
2026-02-09T18:00:00.000Z	49 \| good	9.201 \| good	11.2 \| good	24.792 \| good	0.666 \| good	10.196 \| good	0.186 \| good
2026-02-09T19:00:00.000Z	49 \| good	9.2 \| good	12.181 \| good	24.29 \| good	0.62 \| good	10.259 \| good	0.197 \| good
2026-02-09T20:00:00.000Z	49 \| good	9.237 \| good	11.882 \| good	24.922 \| good	0.582 \| good	8.891 \| good	0.181 \| good
2026-02-09T21:00:00.000Z	44 \| good	8.187 \| good	10.062 \| good	26.274 \| good	0.489 \| good	7.223 \| good	0.17 \| good
2026-02-09T22:00:00.000Z	38 \| good	6.902 \| good	9.225 \| good	27.265 \| good	0.451 \| good	6.04 \| good	0.159 \| good
2026-02-09T23:00:00.000Z	33 \| good	6.056 \| good	8.306 \| good	28.533 \| good	0.384 \| good	5.097 \| good	0.154 \| good
2026-02-10T00:00:00.000Z	27 \| good	5.192 \| good	6.673 \| good	28.909 \| good	0.275 \| good	4.62 \| good	0.153 \| good
2026-02-10T01:00:00.000Z	27 \| good	4.712 \| good	5.865 \| good	28.421 \| good	0.197 \| good	3.981 \| good	0.155 \| good
2026-02-10T02:00:00.000Z	26 \| good	4.262 \| good	5.169 \| good	28.243 \| good	0.171 \| good	3.525 \| good	0.155 \| good
2026-02-10T03:00:00.000Z	26 \| good	3.964 \| good	4.92 \| good	28.047 \| good	0.158 \| good	3.152 \| good	0.152 \| good
2026-02-10T04:00:00.000Z	25 \| good	4.052 \| good	5.086 \| good	27.472 \| good	0.157 \| good	3.058 \| good	0.147 \| good
2026-02-10T05:00:00.000Z	25 \| good	4.216 \| good	5.447 \| good	26.856 \| good	0.173 \| good	3.448 \| good	0.142 \| good
2026-02-10T06:00:00.000Z	24 \| good	4.31 \| good	5.673 \| good	25.727 \| good	0.218 \| good	3.928 \| good	0.138 \| good
2026-02-10T07:00:00.000Z	27 \| good	4.99 \| good	6.812 \| good	23.907 \| good	0.303 \| good	5.809 \| good	0.14 \| good
2026-02-10T08:00:00.000Z	33 \| good	5.925 \| good	8.615 \| good	21.278 \| good	0.391 \| good	9.296 \| good	0.145 \| good
2026-02-10T09:00:00.000Z	33 \| good	6.28 \| good	8.126 \| good	19.761 \| good	0.439 \| good	11.38 \| good	0.147 \| good
2026-02-10T10:00:00.000Z	33 \| good	6.289 \| good	8.183 \| good	21.218 \| good	0.4 \| good	10.94 \| good	0.145 \| good
2026-02-10T11:00:00.000Z	27 \| good	5.312 \| good	7.274 \| good	22.194 \| good	0.366 \| good	9.075 \| good	0.142 \| good
2026-02-10T12:00:00.000Z	27 \| good	4.935 \| good	6.432 \| good	24.221 \| good	0.311 \| good	7.929 \| good	0.14 \| good
2026-02-10T13:00:00.000Z	24 \| good	4.383 \| good	6.135 \| good	26.466 \| good	0.326 \| good	7.012 \| good	0.136 \| good
2026-02-10T14:00:00.000Z	25 \| good	3.961 \| good	5.89 \| good	27.486 \| good	0.344 \| good	6.671 \| good	0.134 \| good
2026-02-10T15:00:00.000Z	28 \| good	3.932 \| good	5.301 \| good	30.147 \| good	0.335 \| good	7.852 \| good	0.135 \| good
2026-02-10T16:00:00.000Z	28 \| good	4.105 \| good	6.143 \| good	29.626 \| good	0.307 \| good	8.57 \| good	0.138 \| good
2026-02-10T17:00:00.000Z	27 \| good	4.622 \| good	5.882 \| good	27.393 \| good	0.283 \| good	9.637 \| good	0.142 \| good
2026-02-10T18:00:00.000Z	27 \| good	4.727 \| good	6.368 \| good	25.651 \| good	0.318 \| good	10.628 \| good	0.148 \| good
2026-02-10T19:00:00.000Z	27 \| good	5.423 \| good	6.504 \| good	22.312 \| good	0.388 \| good	12.746 \| good	0.157 \| good
2026-02-10T20:00:00.000Z	33 \| good	6.114 \| good	6.471 \| good	21.471 \| good	0.435 \| good	14.007 \| good	0.159 \| good
2026-02-10T21:00:00.000Z	33 \| good	5.714 \| good	6.386 \| good	18.756 \| good	0.485 \| good	13.249 \| good	0.16 \| good
2026-02-10T22:00:00.000Z	33 \| good	6.22 \| good	6.941 \| good	16.75 \| good	0.514 \| good	12.429 \| good	0.156 \| good

Hertfordshire

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

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
Harpenden, Hertfordshire	52 Moderate	9.80μg/m³ Good	22.95μg/m³ Good	28.97ppb Good	0.44ppb Good	7.02ppb Good	0.02ppm Good
Hatfield, Hertfordshire	52 Moderate	9.80μg/m³ Good	10.82μg/m³ Good	29.20ppb Good	0.44ppb Good	7.78ppb Good	0.01ppm Good
Bishop's Stortford, Hertfordshire	33 Good	5.56μg/m³ Good	15.71μg/m³ Good	26.50ppb Good	0.54ppb Good	7.51ppb Good	0.02ppm Good
Cheshunt, Hertfordshire	38 Good	7.26μg/m³ Good	25.32μg/m³ Good	26.70ppb Good	0.49ppb Good	12.47ppb Good	0.01ppm Good
Rickmansworth, Hertfordshire	38 Good	6.67μg/m³ Good	23.33μg/m³ Good	26.04ppb Good	0.44ppb Good	11.76ppb Good	0.01ppm Good
Hertford, Hertfordshire	33 Good	5.59μg/m³ Good	10.75μg/m³ Good	26.98ppb Good	0.46ppb Good	6.98ppb Good	0.01ppm Good
Abbots Langley, Hertfordshire	33 Good	5.57μg/m³ Good	18.27μg/m³ Good	25.95ppb Good	0.48ppb Good	13.00ppb Good	0.02ppm Good
Borehamwood, Hertfordshire	38 Good	7.50μg/m³ Good	11.50μg/m³ Good	30.77ppb Good	0.45ppb Good	8.04ppb Good	0.01ppm Good
Berkhamsted, Hertfordshire	38 Good	6.71μg/m³ Good	18.72μg/m³ Good	28.03ppb Good	0.48ppb Good	5.91ppb Good	0.02ppm Good
Bushey, Hertfordshire	49 Good	8.94μg/m³ Good	13.94μg/m³ Good	31.00ppb Good	0.39ppb Good	11.14ppb Good	0.00ppm Good
Chorleywood, Hertfordshire	38 Good	6.67μg/m³ Good	23.33μg/m³ Good	26.04ppb Good	0.44ppb Good	11.76ppb Good	0.01ppm Good
Baldock, Hertfordshire	27 Good	4.53μg/m³ Good	11.70μg/m³ Good	23.95ppb Good	0.44ppb Good	6.04ppb Good	0.02ppm Good
Hemel Hempstead, Hertfordshire	33 Good	5.57μg/m³ Good	18.27μg/m³ Good	25.95ppb Good	0.48ppb Good	13.00ppb Good	0.02ppm Good
Hoddesdon, Hertfordshire	38 Good	7.38μg/m³ Good	25.61μg/m³ Good	25.96ppb Good	0.49ppb Good	13.56ppb Good	0.01ppm Good
Royston, Hertfordshire	44 Good	7.92μg/m³ Good	13.97μg/m³ Good	29.68ppb Good	0.49ppb Good	7.58ppb Good	0.03ppm Good
Sawbridgeworth, Hertfordshire	33 Good	5.56μg/m³ Good	15.71μg/m³ Good	26.50ppb Good	0.54ppb Good	7.51ppb Good	0.02ppm Good
Stevenage, Hertfordshire	27 Good	4.53μg/m³ Good	11.70μg/m³ Good	23.95ppb Good	0.44ppb Good	6.04ppb Good	0.02ppm Good
Letchworth, Hertfordshire	27 Good	4.53μg/m³ Good	11.70μg/m³ Good	23.95ppb Good	0.44ppb Good	6.04ppb Good	0.02ppm Good
Hitchin, Hertfordshire	27 Good	4.53μg/m³ Good	11.70μg/m³ Good	23.95ppb Good	0.44ppb Good	6.04ppb Good	0.02ppm Good
Potters Bar, Hertfordshire	38 Good	7.06μg/m³ Good	13.84μg/m³ Good	28.54ppb Good	0.51ppb Good	7.43ppb Good	0.01ppm Good
St Albans, Hertfordshire	49 Good	9.03μg/m³ Good	16.57μg/m³ Good	30.11ppb Good	0.42ppb Good	10.93ppb Good	0.01ppm Good
Waltham Cross, Hertfordshire	38 Good	7.15μg/m³ Good	25.03μg/m³ Good	27.41ppb Good	0.48ppb Good	11.53ppb Good	0.01ppm Good
Ware, Hertfordshire	33 Good	5.50μg/m³ Good	25.27μg/m³ Good	28.45ppb Good	0.52ppb Good	4.25ppb Good	0.02ppm Good
Welwyn Garden City, Hertfordshire	27 Good	4.62μg/m³ Good	16.34μg/m³ Good	23.70ppb Good	0.44ppb Good	7.02ppb Good	0.01ppm Good
Watford, Hertfordshire	33 Good	5.96μg/m³ Good	9.52μg/m³ Good	28.21ppb Good	0.48ppb Good	7.08ppb Good	0.01ppm Good
Tring, Hertfordshire	38 Good	7.06μg/m³ Good	17.86μg/m³ Good	30.00ppb Good	0.43ppb Good	6.38ppb Good	0.03ppm Good

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

0.03ppm

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

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

View Polluted Cities

Check live rankings of places in the UK with the cleanest air.

View Clean Cities

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 06:00:00 on 2026-02-08.

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 09:00:00 on 2026-02-08.

What is the current air quality in Hertfordshire, UK?

The current air quality in Hertfordshire, UK is 38, 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 PM2.5.

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 6.577 μg/m³.

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

The current PM₁₀ concentration at Hertfordshire, UK is 16.901 μg/m³.

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

The current carbon monoxide (CO) concentration at Hertfordshire, UK is 0.015 ppm.

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

The current sulfur dioxide (SO₂) concentration at Hertfordshire, UK is 0.465 ppb.

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

The current ozone (O₃) concentration at Hertfordshire, UK is 27.171 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Hertfordshire, UK is 8.61 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-02-07T00:00:00.000Z	44 \| good	8.488 \| good	19.502 \| good	20.377 \| good	0.67 \| good	12.243 \| good	0.904 \| good
2026-02-07T01:00:00.000Z	54 \| moderate	10.518 \| good	22.06 \| good	24.027 \| good	0.807 \| good	18.862 \| good	0.848 \| good
2026-02-07T02:00:00.000Z	52 \| moderate	9.876 \| good	24.278 \| good	25.248 \| good	0.713 \| good	18.33 \| good	0.807 \| good
2026-02-07T03:00:00.000Z	49 \| good	9.129 \| good	27.416 \| good	23.658 \| good	0.562 \| good	9.874 \| good	0.706 \| good
2026-02-07T04:00:00.000Z	52 \| moderate	9.638 \| good	17.6 \| good	25.176 \| good	0.562 \| good	9.62 \| good	0.605 \| good
2026-02-07T05:00:00.000Z	52 \| moderate	9.752 \| good	30.402 \| good	27.38 \| good	0.563 \| good	10.62 \| good	0.574 \| good
2026-02-07T06:00:00.000Z	52 \| moderate	9.945 \| good	31.503 \| good	27.458 \| good	0.569 \| good	10.423 \| good	0.029 \| good
2026-02-07T07:00:00.000Z	52 \| moderate	9.999 \| good	23.158 \| good	28.089 \| good	0.575 \| good	8.074 \| good	0.029 \| good
2026-02-07T08:00:00.000Z	49 \| good	8.619 \| good	21.043 \| good	30.863 \| good	0.589 \| good	8.84 \| good	0.034 \| good
2026-02-07T09:00:00.000Z	49 \| good	8.903 \| good	22.006 \| good	28.043 \| good	0.672 \| good	9.544 \| good	0.042 \| good
2026-02-07T10:00:00.000Z	54 \| moderate	10.793 \| good	20.903 \| good	27.842 \| good	0.668 \| good	9.908 \| good	0.047 \| good
2026-02-07T11:00:00.000Z	44 \| good	8.263 \| good	23.482 \| good	28.671 \| good	0.665 \| good	9.533 \| good	0.053 \| good
2026-02-07T12:00:00.000Z	44 \| good	8.272 \| good	19.908 \| good	29.115 \| good	0.561 \| good	11.418 \| good	0.026 \| good
2026-02-07T13:00:00.000Z	44 \| good	7.764 \| good	18.779 \| good	32.319 \| good	0.705 \| good	14.077 \| good	0.024 \| good
2026-02-07T14:00:00.000Z	49 \| good	9.101 \| good	16.005 \| good	31.496 \| good	0.706 \| good	12.948 \| good	0.018 \| good
2026-02-07T15:00:00.000Z	38 \| good	7.385 \| good	21.452 \| good	30.506 \| good	0.667 \| good	17.967 \| good	0.017 \| good
2026-02-07T16:00:00.000Z	49 \| good	9.143 \| good	24.299 \| good	29.921 \| good	0.571 \| good	14.418 \| good	0.022 \| good
2026-02-07T17:00:00.000Z	44 \| good	8.352 \| good	23.317 \| good	29.931 \| good	0.66 \| good	8.66 \| good	0.036 \| good
2026-02-07T18:00:00.000Z	56 \| moderate	11.965 \| good	20.992 \| good	27.514 \| good	0.663 \| good	8.254 \| good	0.04 \| good
2026-02-07T19:00:00.000Z	44 \| good	7.926 \| good	16.38 \| good	24.72 \| good	0.525 \| good	9.384 \| good	0.046 \| good
2026-02-07T20:00:00.000Z	49 \| good	8.603 \| good	29.512 \| good	29.756 \| good	0.667 \| good	11.47 \| good	0.046 \| good
2026-02-07T21:00:00.000Z	49 \| good	9.279 \| good	21.421 \| good	30.071 \| good	0.524 \| good	11.776 \| good	0.044 \| good
2026-02-07T22:00:00.000Z	54 \| moderate	10.82 \| good	18.363 \| good	29.001 \| good	0.621 \| good	9.876 \| good	0.044 \| good
2026-02-07T23:00:00.000Z	52 \| moderate	9.61 \| good	17.963 \| good	30.494 \| good	0.509 \| good	8.757 \| good	0.053 \| good
2026-02-08T00:00:00.000Z	38 \| good	6.792 \| good	25.297 \| good	22.065 \| good	0.517 \| good	15.068 \| good	0.98 \| good
2026-02-08T01:00:00.000Z	44 \| good	7.786 \| good	23.464 \| good	27.285 \| good	0.52 \| good	14.101 \| good	0.788 \| good
2026-02-08T02:00:00.000Z	49 \| good	9.22 \| good	15.652 \| good	26.541 \| good	0.518 \| good	14.817 \| good	0.819 \| good
2026-02-08T03:00:00.000Z	33 \| good	6.448 \| good	17.104 \| good	25.399 \| good	0.437 \| good	8.062 \| good	0.617 \| good
2026-02-08T04:00:00.000Z	27 \| good	5.011 \| good	19.888 \| good	23.136 \| good	0.52 \| good	7.079 \| good	0.479 \| good
2026-02-08T05:00:00.000Z	38 \| good	7.032 \| good	14.104 \| good	23.883 \| good	0.52 \| good	9.24 \| good	0.386 \| good
2026-02-08T06:00:00.000Z	44 \| good	8.281 \| good	32.8 \| good	26.159 \| good	0.494 \| good	3.935 \| good	0.007 \| good
2026-02-08T07:00:00.000Z	44 \| good	7.938 \| good	13.999 \| good	23.729 \| good	0.495 \| good	7.775 \| good	0.008 \| good
2026-02-08T08:00:00.000Z	27 \| good	5.488 \| good	12.975 \| good	22.894 \| good	0.699 \| good	8.515 \| good	0.008 \| good
2026-02-08T09:00:00.000Z	27 \| good	4.676 \| good	14.663 \| good	26.264 \| good	0.709 \| good	11.138 \| good	0.011 \| good
2026-02-08T10:00:00.000Z	27 \| good	5.34 \| good	10.773 \| good	24.89 \| good	0.498 \| good	7.145 \| good	0.009 \| good
2026-02-08T11:00:00.000Z	38 \| good	7.4 \| good	11.033 \| good	22.286 \| good	0.486 \| good	12.617 \| good	0.008 \| good
2026-02-08T12:00:00.000Z	38 \| good	7.215 \| good	19.619 \| good	22.592 \| good	0.492 \| good	10.321 \| good	0.006 \| good
2026-02-08T13:00:00.000Z	38 \| good	7.134 \| good	21.095 \| good	22.796 \| good	0.494 \| good	10.084 \| good	0.005 \| good
2026-02-08T14:00:00.000Z	38 \| good	6.871 \| good	23.102 \| good	25.065 \| good	0.418 \| good	9.848 \| good	0.006 \| good
2026-02-08T15:00:00.000Z	44 \| good	7.739 \| good	21.4 \| good	27.777 \| good	0.49 \| good	13.354 \| good	0.007 \| good
2026-02-08T16:00:00.000Z	27 \| good	5.429 \| good	21.322 \| good	27.998 \| good	0.414 \| good	10.17 \| good	0.007 \| good
2026-02-08T17:00:00.000Z	54 \| moderate	10.6 \| good	16.426 \| good	21.363 \| good	0.478 \| good	12.946 \| good	0.01 \| good
2026-02-08T18:00:00.000Z	54 \| moderate	10.79 \| good	11.519 \| good	22.591 \| good	0.48 \| good	10.059 \| good	0.01 \| good
2026-02-08T19:00:00.000Z	27 \| good	5.186 \| good	15.288 \| good	28.214 \| good	0.432 \| good	7.365 \| good	0.013 \| good
2026-02-08T20:00:00.000Z	31 \| good	4.939 \| good	33.08 \| good	22.073 \| good	0.446 \| good	7.702 \| good	0.01 \| good
2026-02-08T21:00:00.000Z	27 \| good	4.619 \| good	16.336 \| good	23.697 \| good	0.443 \| good	7.023 \| good	0.015 \| good
2026-02-08T22:00:00.000Z	44 \| good	7.937 \| good	9.219 \| good	21.244 \| good	0.428 \| good	7.121 \| good	0.017 \| good
2026-02-08T23:00:00.000Z	49 \| good	9.32 \| good	12.418 \| good	22.048 \| good	0.474 \| good	8.385 \| good	0.015 \| good
2026-02-08T23:00:00.000Z	44 \| good	7.516 \| good	15.418 \| good	27.157 \| good	0.458 \| good	9.32 \| good	0.015 \| good
2026-02-08T23:00:00.000Z	49 \| good	8.605 \| good	10.943 \| good	20.646 \| good	0.52 \| good	11.283 \| good	0.159 \| good
2026-02-09T00:00:00.000Z	44 \| good	8.411 \| good	10.145 \| good	21.503 \| good	0.464 \| good	9.719 \| good	0.156 \| good
2026-02-09T01:00:00.000Z	49 \| good	8.547 \| good	10.213 \| good	22.373 \| good	0.372 \| good	8.29 \| good	0.152 \| good
2026-02-09T02:00:00.000Z	44 \| good	8.486 \| good	10.392 \| good	22.788 \| good	0.354 \| good	6.86 \| good	0.147 \| good
2026-02-09T03:00:00.000Z	49 \| good	8.519 \| good	10.629 \| good	23.328 \| good	0.35 \| good	5.887 \| good	0.145 \| good
2026-02-09T04:00:00.000Z	49 \| good	8.888 \| good	10.983 \| good	23.41 \| good	0.343 \| good	5.377 \| good	0.143 \| good
2026-02-09T05:00:00.000Z	49 \| good	9.228 \| good	11.343 \| good	22.346 \| good	0.341 \| good	5.532 \| good	0.145 \| good
2026-02-09T06:00:00.000Z	52 \| moderate	9.695 \| good	11.93 \| good	20 \| good	0.44 \| good	6.534 \| good	0.147 \| good
2026-02-09T07:00:00.000Z	52 \| moderate	9.694 \| good	12.167 \| good	18.124 \| good	0.552 \| good	8.451 \| good	0.154 \| good
2026-02-09T08:00:00.000Z	49 \| good	8.963 \| good	12.108 \| good	16.178 \| good	0.639 \| good	11.93 \| good	0.16 \| good
2026-02-09T09:00:00.000Z	44 \| good	8.464 \| good	11.782 \| good	16.935 \| good	0.834 \| good	13.743 \| good	0.164 \| good
2026-02-09T10:00:00.000Z	44 \| good	8.193 \| good	10.778 \| good	19.458 \| good	0.841 \| good	13.332 \| good	0.167 \| good
2026-02-09T11:00:00.000Z	44 \| good	8.199 \| good	10.145 \| good	22.104 \| good	0.77 \| good	10.661 \| good	0.165 \| good
2026-02-09T12:00:00.000Z	44 \| good	7.902 \| good	10.378 \| good	24.281 \| good	0.707 \| good	8.498 \| good	0.164 \| good
2026-02-09T13:00:00.000Z	38 \| good	6.652 \| good	9.366 \| good	25.18 \| good	0.592 \| good	7.815 \| good	0.161 \| good
2026-02-09T14:00:00.000Z	38 \| good	6.598 \| good	8.75 \| good	28.653 \| good	0.51 \| good	6.281 \| good	0.158 \| good
2026-02-09T15:00:00.000Z	38 \| good	6.626 \| good	8.751 \| good	30.528 \| good	0.497 \| good	5.557 \| good	0.153 \| good
2026-02-09T16:00:00.000Z	38 \| good	7.215 \| good	9.63 \| good	30.754 \| good	0.492 \| good	6.119 \| good	0.156 \| good
2026-02-09T17:00:00.000Z	44 \| good	8.116 \| good	10.733 \| good	27.848 \| good	0.51 \| good	8.858 \| good	0.165 \| good
2026-02-09T18:00:00.000Z	49 \| good	9.201 \| good	11.2 \| good	24.792 \| good	0.666 \| good	10.196 \| good	0.186 \| good
2026-02-09T19:00:00.000Z	49 \| good	9.2 \| good	12.181 \| good	24.29 \| good	0.62 \| good	10.259 \| good	0.197 \| good
2026-02-09T20:00:00.000Z	49 \| good	9.237 \| good	11.882 \| good	24.922 \| good	0.582 \| good	8.891 \| good	0.181 \| good
2026-02-09T21:00:00.000Z	44 \| good	8.187 \| good	10.062 \| good	26.274 \| good	0.489 \| good	7.223 \| good	0.17 \| good
2026-02-09T22:00:00.000Z	38 \| good	6.902 \| good	9.225 \| good	27.265 \| good	0.451 \| good	6.04 \| good	0.159 \| good
2026-02-09T23:00:00.000Z	33 \| good	6.056 \| good	8.306 \| good	28.533 \| good	0.384 \| good	5.097 \| good	0.154 \| good
2026-02-10T00:00:00.000Z	27 \| good	5.192 \| good	6.673 \| good	28.909 \| good	0.275 \| good	4.62 \| good	0.153 \| good
2026-02-10T01:00:00.000Z	27 \| good	4.712 \| good	5.865 \| good	28.421 \| good	0.197 \| good	3.981 \| good	0.155 \| good
2026-02-10T02:00:00.000Z	26 \| good	4.262 \| good	5.169 \| good	28.243 \| good	0.171 \| good	3.525 \| good	0.155 \| good
2026-02-10T03:00:00.000Z	26 \| good	3.964 \| good	4.92 \| good	28.047 \| good	0.158 \| good	3.152 \| good	0.152 \| good
2026-02-10T04:00:00.000Z	25 \| good	4.052 \| good	5.086 \| good	27.472 \| good	0.157 \| good	3.058 \| good	0.147 \| good
2026-02-10T05:00:00.000Z	25 \| good	4.216 \| good	5.447 \| good	26.856 \| good	0.173 \| good	3.448 \| good	0.142 \| good
2026-02-10T06:00:00.000Z	24 \| good	4.31 \| good	5.673 \| good	25.727 \| good	0.218 \| good	3.928 \| good	0.138 \| good
2026-02-10T07:00:00.000Z	27 \| good	4.99 \| good	6.812 \| good	23.907 \| good	0.303 \| good	5.809 \| good	0.14 \| good
2026-02-10T08:00:00.000Z	33 \| good	5.925 \| good	8.615 \| good	21.278 \| good	0.391 \| good	9.296 \| good	0.145 \| good
2026-02-10T09:00:00.000Z	33 \| good	6.28 \| good	8.126 \| good	19.761 \| good	0.439 \| good	11.38 \| good	0.147 \| good
2026-02-10T10:00:00.000Z	33 \| good	6.289 \| good	8.183 \| good	21.218 \| good	0.4 \| good	10.94 \| good	0.145 \| good
2026-02-10T11:00:00.000Z	27 \| good	5.312 \| good	7.274 \| good	22.194 \| good	0.366 \| good	9.075 \| good	0.142 \| good
2026-02-10T12:00:00.000Z	27 \| good	4.935 \| good	6.432 \| good	24.221 \| good	0.311 \| good	7.929 \| good	0.14 \| good
2026-02-10T13:00:00.000Z	24 \| good	4.383 \| good	6.135 \| good	26.466 \| good	0.326 \| good	7.012 \| good	0.136 \| good
2026-02-10T14:00:00.000Z	25 \| good	3.961 \| good	5.89 \| good	27.486 \| good	0.344 \| good	6.671 \| good	0.134 \| good
2026-02-10T15:00:00.000Z	28 \| good	3.932 \| good	5.301 \| good	30.147 \| good	0.335 \| good	7.852 \| good	0.135 \| good
2026-02-10T16:00:00.000Z	28 \| good	4.105 \| good	6.143 \| good	29.626 \| good	0.307 \| good	8.57 \| good	0.138 \| good
2026-02-10T17:00:00.000Z	27 \| good	4.622 \| good	5.882 \| good	27.393 \| good	0.283 \| good	9.637 \| good	0.142 \| good
2026-02-10T18:00:00.000Z	27 \| good	4.727 \| good	6.368 \| good	25.651 \| good	0.318 \| good	10.628 \| good	0.148 \| good
2026-02-10T19:00:00.000Z	27 \| good	5.423 \| good	6.504 \| good	22.312 \| good	0.388 \| good	12.746 \| good	0.157 \| good
2026-02-10T20:00:00.000Z	33 \| good	6.114 \| good	6.471 \| good	21.471 \| good	0.435 \| good	14.007 \| good	0.159 \| good
2026-02-10T21:00:00.000Z	33 \| good	5.714 \| good	6.386 \| good	18.756 \| good	0.485 \| good	13.249 \| good	0.16 \| good
2026-02-10T22:00:00.000Z	33 \| good	6.22 \| good	6.941 \| good	16.75 \| good	0.514 \| good	12.429 \| good	0.156 \| good

Hertfordshire, UK live air quality index now

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?