What is the sulfur dioxide (SO2) level in Hertford, Hertfordshire at the moment?

Currently, Hertford, Hertfordshire has a sulfur dioxide (SO2) concentration of 0.815 ppb.

What is the ozone (O3) level in Hertford, Hertfordshire at the moment?

The current ozone (O3) level in Hertford, Hertfordshire at the moment is 22.415 ppm.

What is the nitrogen dioxide (NO2) level in Hertford, Hertfordshire at the moment?

Nitrogen dioxide (NO2) level in Hertford, Hertfordshire at the moment is 9.229 ppb.

Live air quality index in Hertford, Hertfordshire today

Q: What is the PM2.5 level in Hertford, Hertfordshire at the moment?

PM2.5 levels in Hertford, Hertfordshire are currently 21.06 μg/m3.

Q: What is the PM10 level in Hertford, Hertfordshire at the moment?

The PM10 concentration in Hertford, Hertfordshire is 25.222 μg/m3 at the moment.

Stay updated with real-time air quality in Hertford, 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)

Moderate

Hertford, Hertfordshire

Last updated: ... (Local time)

Major air pollutants in Hertford, Hertfordshire

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

14.97 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

27.34 μg/m³

155

255

425

605+

Ozone (O₃)

24.43 ppb

201

201+

Sulfur Dioxide (SO₂)

0.83 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

13.02 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.04 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

Hertford, Hertfordshire

Get Live Pollen Counts

Hertford, Hertfordshire

Scroll To Air Quality Map

Track live Hertford, Hertfordshire air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-08T22:00:00.000Z	62 \| moderate	15.446 \| fine	24.889 \| good	23.667 \| good	0.766 \| good	8.908 \| good	0.063 \| good
2026-03-08T23:00:00.000Z	67 \| moderate	17.91 \| fine	26.34 \| good	23.896 \| good	0.521 \| good	8.345 \| good	0.047 \| good
2026-03-09T00:00:00.000Z	106 \| sensitive	20.38 \| fine	165.991 \| moderate	23.983 \| good	0.649 \| good	7.802 \| good	0.735 \| good
2026-03-09T01:00:00.000Z	84 \| moderate	27.42 \| fine	44.432 \| good	21.106 \| good	0.679 \| good	9.345 \| good	0.646 \| good
2026-03-09T02:00:00.000Z	75 \| moderate	21.52 \| fine	43.055 \| good	22.201 \| good	0.681 \| good	7.5 \| good	0.67 \| good
2026-03-09T03:00:00.000Z	96 \| moderate	32.897 \| fine	44.027 \| good	17.665 \| good	0.673 \| good	6.322 \| good	0.538 \| good
2026-03-09T04:00:00.000Z	96 \| moderate	33.339 \| fine	41.396 \| good	18.846 \| good	0.675 \| good	7.822 \| good	0.495 \| good
2026-03-09T05:00:00.000Z	81 \| moderate	25.225 \| fine	41.4 \| good	17.718 \| good	0.744 \| good	7.023 \| good	0.462 \| good
2026-03-09T06:00:00.000Z	94 \| moderate	32.249 \| fine	38.03 \| good	19.356 \| good	0.698 \| good	8.991 \| good	0.457 \| good
2026-03-09T07:00:00.000Z	71 \| moderate	20.3 \| fine	84.679 \| fine	20.408 \| good	0.553 \| good	6.546 \| good	0.03 \| good
2026-03-09T08:00:00.000Z	115 \| sensitive	40.564 \| moderate	134.281 \| fine	17.626 \| good	0.45 \| good	8.412 \| good	0.032 \| good
2026-03-09T09:00:00.000Z	107 \| sensitive	38.374 \| moderate	68.329 \| fine	18.777 \| good	0.449 \| good	12.08 \| good	0.027 \| good
2026-03-09T10:00:00.000Z	105 \| sensitive	36.582 \| moderate	70.388 \| fine	15.366 \| good	0.45 \| good	6.176 \| good	0.023 \| good
2026-03-09T11:00:00.000Z	88 \| moderate	29.42 \| fine	66.2 \| fine	14.243 \| good	0.53 \| good	9.661 \| good	0.022 \| good
2026-03-09T12:00:00.000Z	110 \| sensitive	38.69 \| moderate	117.923 \| fine	15.292 \| good	0.771 \| good	9.274 \| good	0.012 \| good
2026-03-09T13:00:00.000Z	105 \| sensitive	36.799 \| moderate	60.612 \| fine	15.881 \| good	0.929 \| good	17.086 \| good	0.012 \| good
2026-03-09T14:00:00.000Z	97 \| moderate	34.142 \| fine	35.713 \| good	15.833 \| good	1.003 \| good	11.225 \| good	0.011 \| good
2026-03-09T15:00:00.000Z	81 \| moderate	25.163 \| fine	34.531 \| good	16.884 \| good	1.089 \| good	15.877 \| good	0.011 \| good
2026-03-09T16:00:00.000Z	119 \| sensitive	42.664 \| moderate	122.179 \| fine	19.961 \| good	0.951 \| good	11.777 \| good	0.012 \| good
2026-03-09T17:00:00.000Z	97 \| moderate	34.182 \| fine	81.259 \| fine	21.677 \| good	0.97 \| good	13.33 \| good	0.013 \| good
2026-03-09T18:00:00.000Z	124 \| sensitive	45.13 \| moderate	176.948 \| moderate	24.103 \| good	0.713 \| good	7.8 \| good	0.016 \| good
2026-03-09T19:00:00.000Z	86 \| moderate	27.695 \| fine	43.74 \| good	15.567 \| good	0.64 \| good	19.456 \| good	0.026 \| good
2026-03-09T20:00:00.000Z	110 \| sensitive	38.82 \| moderate	48 \| good	18.778 \| good	0.641 \| good	13.053 \| good	0.026 \| good
2026-03-09T21:00:00.000Z	90 \| moderate	30.26 \| fine	74.8 \| fine	18.204 \| good	0.948 \| good	16.904 \| good	0.027 \| good
2026-03-09T22:00:00.000Z	81 \| moderate	24.939 \| fine	93.695 \| fine	17.452 \| good	1.107 \| good	16.765 \| good	0.036 \| good
2026-03-09T23:00:00.000Z	115 \| sensitive	41.481 \| moderate	68.967 \| fine	15.062 \| good	1.146 \| good	17.742 \| good	0.048 \| good
2026-03-10T00:00:00.000Z	81 \| moderate	25.446 \| fine	72.841 \| fine	10.621 \| good	1.261 \| good	16.713 \| good	0.838 \| good
2026-03-10T01:00:00.000Z	38 \| good	6.7 \| good	30.013 \| good	14.098 \| good	0.994 \| good	14.352 \| good	0.833 \| good
2026-03-10T02:00:00.000Z	88 \| moderate	29.25 \| fine	37.58 \| good	8.39 \| good	0.928 \| good	13.743 \| good	0.801 \| good
2026-03-10T03:00:00.000Z	88 \| moderate	28.501 \| fine	44.649 \| good	9.657 \| good	0.823 \| good	13.894 \| good	0.71 \| good
2026-03-10T04:00:00.000Z	90 \| moderate	30.157 \| fine	97.943 \| fine	10.077 \| good	0.808 \| good	11.533 \| good	0.65 \| good
2026-03-10T05:00:00.000Z	33 \| good	6.4 \| good	29.932 \| good	12.968 \| good	0.785 \| good	13.817 \| good	0.52 \| good
2026-03-10T06:00:00.000Z	79 \| moderate	23.638 \| fine	38.338 \| good	16.336 \| good	0.84 \| good	4.87 \| good	0.548 \| good
2026-03-10T07:00:00.000Z	69 \| moderate	19 \| fine	42.593 \| good	15.67 \| good	0.778 \| good	10.984 \| good	0.032 \| good
2026-03-10T08:00:00.000Z	71 \| moderate	20.003 \| fine	31.835 \| good	22.81 \| good	0.568 \| good	10.584 \| good	0.034 \| good
2026-03-10T09:00:00.000Z	69 \| moderate	19.169 \| fine	42.26 \| good	14.75 \| good	1.066 \| good	13.489 \| good	0.028 \| good
2026-03-10T10:00:00.000Z	27 \| good	5.42 \| good	28.444 \| good	16.005 \| good	1.188 \| good	17.117 \| good	0.02 \| good
2026-03-10T11:00:00.000Z	81 \| moderate	25.467 \| fine	53.915 \| good	15.826 \| good	1.175 \| good	12.17 \| good	0.013 \| good
2026-03-10T12:00:00.000Z	88 \| moderate	28.683 \| fine	53.873 \| good	19.133 \| good	1.028 \| good	10.975 \| good	0.009 \| good
2026-03-10T13:00:00.000Z	82 \| moderate	26.045 \| fine	48.549 \| good	15.985 \| good	1.039 \| good	12.67 \| good	0.009 \| good
2026-03-10T14:00:00.000Z	92 \| moderate	31.228 \| fine	72.046 \| fine	20.812 \| good	1.013 \| good	12.812 \| good	0.01 \| good
2026-03-10T15:00:00.000Z	84 \| moderate	26.579 \| fine	73.24 \| fine	19.486 \| good	1.042 \| good	12.974 \| good	0.01 \| good
2026-03-10T16:00:00.000Z	94 \| moderate	32.162 \| fine	87.98 \| fine	21.823 \| good	1.057 \| good	12.558 \| good	0.01 \| good
2026-03-10T17:00:00.000Z	38 \| good	6.9 \| good	31.638 \| good	20.031 \| good	1.135 \| good	10.383 \| good	0.015 \| good
2026-03-10T18:00:00.000Z	73 \| moderate	21.218 \| fine	25.77 \| good	22.985 \| good	0.878 \| good	11.71 \| good	0.02 \| good
2026-03-10T19:00:00.000Z	73 \| moderate	21.06 \| fine	25.222 \| good	22.415 \| good	0.815 \| good	9.229 \| good	0.023 \| good
2026-03-10T20:00:00.000Z	62 \| moderate	14.969 \| fine	27.34 \| good	24.432 \| good	0.835 \| good	13.021 \| good	0.036 \| good
2026-03-10T21:00:00.000Z	77 \| moderate	23.491 \| fine	28.443 \| good	23.25 \| good	0.851 \| good	8.786 \| good	0.048 \| good
2026-03-10T21:00:00.000Z	62 \| moderate	14.969 \| fine	27.34 \| good	24.432 \| good	0.835 \| good	13.021 \| good	0.036 \| good
2026-03-10T21:00:00.000Z	33 \| good	6.06 \| good	8.887 \| good	35.666 \| good	0.424 \| good	6.388 \| good	0.136 \| good
2026-03-10T22:00:00.000Z	33 \| good	5.959 \| good	8.189 \| good	35.105 \| good	0.347 \| good	5.48 \| good	0.134 \| good
2026-03-10T23:00:00.000Z	32 \| good	4.26 \| good	5.944 \| good	35.239 \| good	0.212 \| good	4.371 \| good	0.132 \| good
2026-03-11T00:00:00.000Z	33 \| good	2.788 \| good	4.449 \| good	36.426 \| good	0.139 \| good	3.311 \| good	0.129 \| good
2026-03-11T01:00:00.000Z	35 \| good	2.257 \| good	3.291 \| good	38.052 \| good	0.1 \| good	2.504 \| good	0.127 \| good
2026-03-11T02:00:00.000Z	35 \| good	2.072 \| good	3.27 \| good	38.417 \| good	0.085 \| good	2.136 \| good	0.127 \| good
2026-03-11T03:00:00.000Z	36 \| good	1.805 \| good	3.041 \| good	38.519 \| good	0.092 \| good	1.976 \| good	0.128 \| good
2026-03-11T04:00:00.000Z	35 \| good	1.913 \| good	3.018 \| good	38.132 \| good	0.1 \| good	1.786 \| good	0.127 \| good
2026-03-11T05:00:00.000Z	34 \| good	2.635 \| good	4.44 \| good	36.723 \| good	0.115 \| good	1.739 \| good	0.125 \| good
2026-03-11T06:00:00.000Z	33 \| good	3.954 \| good	7.604 \| good	36.092 \| good	0.161 \| good	1.753 \| good	0.125 \| good
2026-03-11T07:00:00.000Z	34 \| good	4.782 \| good	10.185 \| good	37.073 \| good	0.243 \| good	2.488 \| good	0.131 \| good
2026-03-11T08:00:00.000Z	32 \| good	4.866 \| good	12.319 \| good	35.494 \| good	0.356 \| good	3.172 \| good	0.139 \| good
2026-03-11T09:00:00.000Z	33 \| good	4.323 \| good	11.034 \| good	36.123 \| good	0.342 \| good	3.083 \| good	0.144 \| good
2026-03-11T10:00:00.000Z	35 \| good	3.596 \| good	9.122 \| good	37.501 \| good	0.282 \| good	2.346 \| good	0.147 \| good
2026-03-11T11:00:00.000Z	36 \| good	3.112 \| good	8.73 \| good	38.699 \| good	0.241 \| good	1.939 \| good	0.148 \| good
2026-03-11T12:00:00.000Z	38 \| good	2.595 \| good	8.077 \| good	41.233 \| good	0.197 \| good	1.502 \| good	0.145 \| good
2026-03-11T13:00:00.000Z	41 \| good	2.235 \| good	7.86 \| good	44.184 \| good	0.174 \| good	1.404 \| good	0.143 \| good
2026-03-11T14:00:00.000Z	42 \| good	2.266 \| good	7.511 \| good	44.964 \| good	0.175 \| good	1.483 \| good	0.141 \| good
2026-03-11T15:00:00.000Z	42 \| good	2.533 \| good	6.687 \| good	45.112 \| good	0.18 \| good	1.59 \| good	0.141 \| good
2026-03-11T16:00:00.000Z	41 \| good	2.781 \| good	6.728 \| good	44.393 \| good	0.174 \| good	2.12 \| good	0.14 \| good
2026-03-11T17:00:00.000Z	40 \| good	3.304 \| good	7.895 \| good	43.462 \| good	0.193 \| good	3.034 \| good	0.143 \| good
2026-03-11T18:00:00.000Z	34 \| good	4.336 \| good	9.531 \| good	36.832 \| good	0.316 \| good	5.283 \| good	0.15 \| good
2026-03-11T19:00:00.000Z	33 \| good	5.673 \| good	12.2 \| good	33.071 \| good	0.503 \| good	7.793 \| good	0.161 \| good
2026-03-11T20:00:00.000Z	38 \| good	6.667 \| good	12.917 \| good	33.927 \| good	0.622 \| good	8.257 \| good	0.163 \| good
2026-03-11T21:00:00.000Z	38 \| good	7.007 \| good	13.193 \| good	35.866 \| good	0.54 \| good	7.54 \| good	0.158 \| good
2026-03-11T22:00:00.000Z	44 \| good	7.543 \| good	12.697 \| good	37.286 \| good	0.489 \| good	6.255 \| good	0.153 \| good
2026-03-11T23:00:00.000Z	38 \| good	6.927 \| good	13.043 \| good	37.037 \| good	0.4 \| good	4.905 \| good	0.149 \| good
2026-03-12T00:00:00.000Z	36 \| good	5.768 \| good	12.582 \| good	38.587 \| good	0.319 \| good	3.942 \| good	0.144 \| good
2026-03-12T01:00:00.000Z	34 \| good	5.579 \| good	11.919 \| good	36.979 \| good	0.279 \| good	3.505 \| good	0.144 \| good
2026-03-12T02:00:00.000Z	34 \| good	5.117 \| good	11.572 \| good	37.328 \| good	0.222 \| good	2.744 \| good	0.141 \| good
2026-03-12T03:00:00.000Z	35 \| good	4.598 \| good	10.299 \| good	38.295 \| good	0.195 \| good	1.971 \| good	0.139 \| good
2026-03-12T04:00:00.000Z	38 \| good	4.121 \| good	9.523 \| good	41.215 \| good	0.185 \| good	1.691 \| good	0.135 \| good
2026-03-12T05:00:00.000Z	41 \| good	3.979 \| good	9.69 \| good	43.899 \| good	0.166 \| good	1.514 \| good	0.132 \| good
2026-03-12T06:00:00.000Z	42 \| good	3.91 \| good	10.22 \| good	44.588 \| good	0.204 \| good	1.956 \| good	0.132 \| good
2026-03-12T07:00:00.000Z	42 \| good	3.933 \| good	11.303 \| good	45.014 \| good	0.256 \| good	2.465 \| good	0.133 \| good
2026-03-12T08:00:00.000Z	41 \| good	4.235 \| good	13.229 \| good	44.038 \| good	0.307 \| good	3.964 \| good	0.137 \| good
2026-03-12T09:00:00.000Z	41 \| good	4.188 \| good	14.938 \| good	43.858 \| good	0.361 \| good	4.452 \| good	0.136 \| good
2026-03-12T10:00:00.000Z	42 \| good	3.905 \| good	10.904 \| good	45.14 \| good	0.313 \| good	4.267 \| good	0.135 \| good
2026-03-12T11:00:00.000Z	43 \| good	3.78 \| good	10.612 \| good	45.641 \| good	0.281 \| good	3.799 \| good	0.132 \| good
2026-03-12T12:00:00.000Z	42 \| good	4.295 \| good	9.845 \| good	45.384 \| good	0.246 \| good	3.411 \| good	0.129 \| good
2026-03-12T13:00:00.000Z	42 \| good	4.134 \| good	9.652 \| good	45.385 \| good	0.217 \| good	3.342 \| good	0.129 \| good
2026-03-12T14:00:00.000Z	42 \| good	3.99 \| good	9.59 \| good	45.492 \| good	0.182 \| good	3.488 \| good	0.129 \| good
2026-03-12T15:00:00.000Z	42 \| good	3.948 \| good	8.827 \| good	44.599 \| good	0.174 \| good	3.656 \| good	0.128 \| good
2026-03-12T16:00:00.000Z	40 \| good	3.873 \| good	8.142 \| good	43.389 \| good	0.169 \| good	4.048 \| good	0.126 \| good
2026-03-12T17:00:00.000Z	38 \| good	3.887 \| good	7.568 \| good	41.371 \| good	0.153 \| good	4.439 \| good	0.125 \| good
2026-03-12T18:00:00.000Z	37 \| good	3.746 \| good	7.29 \| good	39.595 \| good	0.173 \| good	4.768 \| good	0.124 \| good
2026-03-12T19:00:00.000Z	36 \| good	3.559 \| good	6.853 \| good	39.325 \| good	0.179 \| good	4.225 \| good	0.123 \| good
2026-03-12T20:00:00.000Z	36 \| good	3.644 \| good	6.935 \| good	38.84 \| good	0.188 \| good	3.74 \| good	0.119 \| good

Hertford

Get reliable air quality data to drive your business

Hertford, Hertfordshire air quality map: Stay updated on AQI near you

0.04ppm

How accurate is Hertfordshire, UK air quality data?

Air quality and pollutant data for Hertfordshire, UK are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Hertford, Hertfordshire?

The air quality information for Hertford, Hertfordshire is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Hertford, Hertfordshire at its worst?

In the past 24 hours, the air quality in Hertford, Hertfordshire was at its worst at 11:00:00 on 2026-03-09.

When did Hertford, Hertfordshire experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Hertford, Hertfordshire was observed at 10:00:00 on 2026-03-10.

What is the AQI in Hertford, Hertfordshire right now?

As of now, the AQI in Hertford, Hertfordshire is 73, indicating Moderate conditions.

What is the most common type of pollution in Hertford, Hertfordshire?

Hertford, Hertfordshire air has the highest levels of PM2.5.

What should I do in case of poor air quality in Hertford, Hertfordshire?

Poor air quality in Hertford, Hertfordshire means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Hertford, Hertfordshire at the moment?

PM_2.5 levels in Hertford, Hertfordshire are currently 21.06 μg/m³.

What is the PM₁₀ level in Hertford, Hertfordshire at the moment?

The PM₁₀ concentration in Hertford, Hertfordshire is 25.222 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Hertford, Hertfordshire at the moment?

The current carbon monoxide (CO) concentration in Hertford, Hertfordshire is 0.023 ppm.

What is the sulfur dioxide (SO₂) level in Hertford, Hertfordshire at the moment?

Currently, Hertford, Hertfordshire has a sulfur dioxide (SO₂) concentration of 0.815 ppb.

What is the ozone (O₃) level in Hertford, Hertfordshire at the moment?

The current ozone (O₃) level in Hertford, Hertfordshire at the moment is 22.415 ppm.

What is the nitrogen dioxide (NO₂) level in Hertford, Hertfordshire at the moment?

Nitrogen dioxide (NO₂) level in Hertford, Hertfordshire at the moment is 9.229 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-08T22:00:00.000Z	62 \| moderate	15.446 \| fine	24.889 \| good	23.667 \| good	0.766 \| good	8.908 \| good	0.063 \| good
2026-03-08T23:00:00.000Z	67 \| moderate	17.91 \| fine	26.34 \| good	23.896 \| good	0.521 \| good	8.345 \| good	0.047 \| good
2026-03-09T00:00:00.000Z	106 \| sensitive	20.38 \| fine	165.991 \| moderate	23.983 \| good	0.649 \| good	7.802 \| good	0.735 \| good
2026-03-09T01:00:00.000Z	84 \| moderate	27.42 \| fine	44.432 \| good	21.106 \| good	0.679 \| good	9.345 \| good	0.646 \| good
2026-03-09T02:00:00.000Z	75 \| moderate	21.52 \| fine	43.055 \| good	22.201 \| good	0.681 \| good	7.5 \| good	0.67 \| good
2026-03-09T03:00:00.000Z	96 \| moderate	32.897 \| fine	44.027 \| good	17.665 \| good	0.673 \| good	6.322 \| good	0.538 \| good
2026-03-09T04:00:00.000Z	96 \| moderate	33.339 \| fine	41.396 \| good	18.846 \| good	0.675 \| good	7.822 \| good	0.495 \| good
2026-03-09T05:00:00.000Z	81 \| moderate	25.225 \| fine	41.4 \| good	17.718 \| good	0.744 \| good	7.023 \| good	0.462 \| good
2026-03-09T06:00:00.000Z	94 \| moderate	32.249 \| fine	38.03 \| good	19.356 \| good	0.698 \| good	8.991 \| good	0.457 \| good
2026-03-09T07:00:00.000Z	71 \| moderate	20.3 \| fine	84.679 \| fine	20.408 \| good	0.553 \| good	6.546 \| good	0.03 \| good
2026-03-09T08:00:00.000Z	115 \| sensitive	40.564 \| moderate	134.281 \| fine	17.626 \| good	0.45 \| good	8.412 \| good	0.032 \| good
2026-03-09T09:00:00.000Z	107 \| sensitive	38.374 \| moderate	68.329 \| fine	18.777 \| good	0.449 \| good	12.08 \| good	0.027 \| good
2026-03-09T10:00:00.000Z	105 \| sensitive	36.582 \| moderate	70.388 \| fine	15.366 \| good	0.45 \| good	6.176 \| good	0.023 \| good
2026-03-09T11:00:00.000Z	88 \| moderate	29.42 \| fine	66.2 \| fine	14.243 \| good	0.53 \| good	9.661 \| good	0.022 \| good
2026-03-09T12:00:00.000Z	110 \| sensitive	38.69 \| moderate	117.923 \| fine	15.292 \| good	0.771 \| good	9.274 \| good	0.012 \| good
2026-03-09T13:00:00.000Z	105 \| sensitive	36.799 \| moderate	60.612 \| fine	15.881 \| good	0.929 \| good	17.086 \| good	0.012 \| good
2026-03-09T14:00:00.000Z	97 \| moderate	34.142 \| fine	35.713 \| good	15.833 \| good	1.003 \| good	11.225 \| good	0.011 \| good
2026-03-09T15:00:00.000Z	81 \| moderate	25.163 \| fine	34.531 \| good	16.884 \| good	1.089 \| good	15.877 \| good	0.011 \| good
2026-03-09T16:00:00.000Z	119 \| sensitive	42.664 \| moderate	122.179 \| fine	19.961 \| good	0.951 \| good	11.777 \| good	0.012 \| good
2026-03-09T17:00:00.000Z	97 \| moderate	34.182 \| fine	81.259 \| fine	21.677 \| good	0.97 \| good	13.33 \| good	0.013 \| good
2026-03-09T18:00:00.000Z	124 \| sensitive	45.13 \| moderate	176.948 \| moderate	24.103 \| good	0.713 \| good	7.8 \| good	0.016 \| good
2026-03-09T19:00:00.000Z	86 \| moderate	27.695 \| fine	43.74 \| good	15.567 \| good	0.64 \| good	19.456 \| good	0.026 \| good
2026-03-09T20:00:00.000Z	110 \| sensitive	38.82 \| moderate	48 \| good	18.778 \| good	0.641 \| good	13.053 \| good	0.026 \| good
2026-03-09T21:00:00.000Z	90 \| moderate	30.26 \| fine	74.8 \| fine	18.204 \| good	0.948 \| good	16.904 \| good	0.027 \| good
2026-03-09T22:00:00.000Z	81 \| moderate	24.939 \| fine	93.695 \| fine	17.452 \| good	1.107 \| good	16.765 \| good	0.036 \| good
2026-03-09T23:00:00.000Z	115 \| sensitive	41.481 \| moderate	68.967 \| fine	15.062 \| good	1.146 \| good	17.742 \| good	0.048 \| good
2026-03-10T00:00:00.000Z	81 \| moderate	25.446 \| fine	72.841 \| fine	10.621 \| good	1.261 \| good	16.713 \| good	0.838 \| good
2026-03-10T01:00:00.000Z	38 \| good	6.7 \| good	30.013 \| good	14.098 \| good	0.994 \| good	14.352 \| good	0.833 \| good
2026-03-10T02:00:00.000Z	88 \| moderate	29.25 \| fine	37.58 \| good	8.39 \| good	0.928 \| good	13.743 \| good	0.801 \| good
2026-03-10T03:00:00.000Z	88 \| moderate	28.501 \| fine	44.649 \| good	9.657 \| good	0.823 \| good	13.894 \| good	0.71 \| good
2026-03-10T04:00:00.000Z	90 \| moderate	30.157 \| fine	97.943 \| fine	10.077 \| good	0.808 \| good	11.533 \| good	0.65 \| good
2026-03-10T05:00:00.000Z	33 \| good	6.4 \| good	29.932 \| good	12.968 \| good	0.785 \| good	13.817 \| good	0.52 \| good
2026-03-10T06:00:00.000Z	79 \| moderate	23.638 \| fine	38.338 \| good	16.336 \| good	0.84 \| good	4.87 \| good	0.548 \| good
2026-03-10T07:00:00.000Z	69 \| moderate	19 \| fine	42.593 \| good	15.67 \| good	0.778 \| good	10.984 \| good	0.032 \| good
2026-03-10T08:00:00.000Z	71 \| moderate	20.003 \| fine	31.835 \| good	22.81 \| good	0.568 \| good	10.584 \| good	0.034 \| good
2026-03-10T09:00:00.000Z	69 \| moderate	19.169 \| fine	42.26 \| good	14.75 \| good	1.066 \| good	13.489 \| good	0.028 \| good
2026-03-10T10:00:00.000Z	27 \| good	5.42 \| good	28.444 \| good	16.005 \| good	1.188 \| good	17.117 \| good	0.02 \| good
2026-03-10T11:00:00.000Z	81 \| moderate	25.467 \| fine	53.915 \| good	15.826 \| good	1.175 \| good	12.17 \| good	0.013 \| good
2026-03-10T12:00:00.000Z	88 \| moderate	28.683 \| fine	53.873 \| good	19.133 \| good	1.028 \| good	10.975 \| good	0.009 \| good
2026-03-10T13:00:00.000Z	82 \| moderate	26.045 \| fine	48.549 \| good	15.985 \| good	1.039 \| good	12.67 \| good	0.009 \| good
2026-03-10T14:00:00.000Z	92 \| moderate	31.228 \| fine	72.046 \| fine	20.812 \| good	1.013 \| good	12.812 \| good	0.01 \| good
2026-03-10T15:00:00.000Z	84 \| moderate	26.579 \| fine	73.24 \| fine	19.486 \| good	1.042 \| good	12.974 \| good	0.01 \| good
2026-03-10T16:00:00.000Z	94 \| moderate	32.162 \| fine	87.98 \| fine	21.823 \| good	1.057 \| good	12.558 \| good	0.01 \| good
2026-03-10T17:00:00.000Z	38 \| good	6.9 \| good	31.638 \| good	20.031 \| good	1.135 \| good	10.383 \| good	0.015 \| good
2026-03-10T18:00:00.000Z	73 \| moderate	21.218 \| fine	25.77 \| good	22.985 \| good	0.878 \| good	11.71 \| good	0.02 \| good
2026-03-10T19:00:00.000Z	73 \| moderate	21.06 \| fine	25.222 \| good	22.415 \| good	0.815 \| good	9.229 \| good	0.023 \| good
2026-03-10T20:00:00.000Z	62 \| moderate	14.969 \| fine	27.34 \| good	24.432 \| good	0.835 \| good	13.021 \| good	0.036 \| good
2026-03-10T21:00:00.000Z	77 \| moderate	23.491 \| fine	28.443 \| good	23.25 \| good	0.851 \| good	8.786 \| good	0.048 \| good
2026-03-10T21:00:00.000Z	62 \| moderate	14.969 \| fine	27.34 \| good	24.432 \| good	0.835 \| good	13.021 \| good	0.036 \| good
2026-03-10T21:00:00.000Z	33 \| good	6.06 \| good	8.887 \| good	35.666 \| good	0.424 \| good	6.388 \| good	0.136 \| good
2026-03-10T22:00:00.000Z	33 \| good	5.959 \| good	8.189 \| good	35.105 \| good	0.347 \| good	5.48 \| good	0.134 \| good
2026-03-10T23:00:00.000Z	32 \| good	4.26 \| good	5.944 \| good	35.239 \| good	0.212 \| good	4.371 \| good	0.132 \| good
2026-03-11T00:00:00.000Z	33 \| good	2.788 \| good	4.449 \| good	36.426 \| good	0.139 \| good	3.311 \| good	0.129 \| good
2026-03-11T01:00:00.000Z	35 \| good	2.257 \| good	3.291 \| good	38.052 \| good	0.1 \| good	2.504 \| good	0.127 \| good
2026-03-11T02:00:00.000Z	35 \| good	2.072 \| good	3.27 \| good	38.417 \| good	0.085 \| good	2.136 \| good	0.127 \| good
2026-03-11T03:00:00.000Z	36 \| good	1.805 \| good	3.041 \| good	38.519 \| good	0.092 \| good	1.976 \| good	0.128 \| good
2026-03-11T04:00:00.000Z	35 \| good	1.913 \| good	3.018 \| good	38.132 \| good	0.1 \| good	1.786 \| good	0.127 \| good
2026-03-11T05:00:00.000Z	34 \| good	2.635 \| good	4.44 \| good	36.723 \| good	0.115 \| good	1.739 \| good	0.125 \| good
2026-03-11T06:00:00.000Z	33 \| good	3.954 \| good	7.604 \| good	36.092 \| good	0.161 \| good	1.753 \| good	0.125 \| good
2026-03-11T07:00:00.000Z	34 \| good	4.782 \| good	10.185 \| good	37.073 \| good	0.243 \| good	2.488 \| good	0.131 \| good
2026-03-11T08:00:00.000Z	32 \| good	4.866 \| good	12.319 \| good	35.494 \| good	0.356 \| good	3.172 \| good	0.139 \| good
2026-03-11T09:00:00.000Z	33 \| good	4.323 \| good	11.034 \| good	36.123 \| good	0.342 \| good	3.083 \| good	0.144 \| good
2026-03-11T10:00:00.000Z	35 \| good	3.596 \| good	9.122 \| good	37.501 \| good	0.282 \| good	2.346 \| good	0.147 \| good
2026-03-11T11:00:00.000Z	36 \| good	3.112 \| good	8.73 \| good	38.699 \| good	0.241 \| good	1.939 \| good	0.148 \| good
2026-03-11T12:00:00.000Z	38 \| good	2.595 \| good	8.077 \| good	41.233 \| good	0.197 \| good	1.502 \| good	0.145 \| good
2026-03-11T13:00:00.000Z	41 \| good	2.235 \| good	7.86 \| good	44.184 \| good	0.174 \| good	1.404 \| good	0.143 \| good
2026-03-11T14:00:00.000Z	42 \| good	2.266 \| good	7.511 \| good	44.964 \| good	0.175 \| good	1.483 \| good	0.141 \| good
2026-03-11T15:00:00.000Z	42 \| good	2.533 \| good	6.687 \| good	45.112 \| good	0.18 \| good	1.59 \| good	0.141 \| good
2026-03-11T16:00:00.000Z	41 \| good	2.781 \| good	6.728 \| good	44.393 \| good	0.174 \| good	2.12 \| good	0.14 \| good
2026-03-11T17:00:00.000Z	40 \| good	3.304 \| good	7.895 \| good	43.462 \| good	0.193 \| good	3.034 \| good	0.143 \| good
2026-03-11T18:00:00.000Z	34 \| good	4.336 \| good	9.531 \| good	36.832 \| good	0.316 \| good	5.283 \| good	0.15 \| good
2026-03-11T19:00:00.000Z	33 \| good	5.673 \| good	12.2 \| good	33.071 \| good	0.503 \| good	7.793 \| good	0.161 \| good
2026-03-11T20:00:00.000Z	38 \| good	6.667 \| good	12.917 \| good	33.927 \| good	0.622 \| good	8.257 \| good	0.163 \| good
2026-03-11T21:00:00.000Z	38 \| good	7.007 \| good	13.193 \| good	35.866 \| good	0.54 \| good	7.54 \| good	0.158 \| good
2026-03-11T22:00:00.000Z	44 \| good	7.543 \| good	12.697 \| good	37.286 \| good	0.489 \| good	6.255 \| good	0.153 \| good
2026-03-11T23:00:00.000Z	38 \| good	6.927 \| good	13.043 \| good	37.037 \| good	0.4 \| good	4.905 \| good	0.149 \| good
2026-03-12T00:00:00.000Z	36 \| good	5.768 \| good	12.582 \| good	38.587 \| good	0.319 \| good	3.942 \| good	0.144 \| good
2026-03-12T01:00:00.000Z	34 \| good	5.579 \| good	11.919 \| good	36.979 \| good	0.279 \| good	3.505 \| good	0.144 \| good
2026-03-12T02:00:00.000Z	34 \| good	5.117 \| good	11.572 \| good	37.328 \| good	0.222 \| good	2.744 \| good	0.141 \| good
2026-03-12T03:00:00.000Z	35 \| good	4.598 \| good	10.299 \| good	38.295 \| good	0.195 \| good	1.971 \| good	0.139 \| good
2026-03-12T04:00:00.000Z	38 \| good	4.121 \| good	9.523 \| good	41.215 \| good	0.185 \| good	1.691 \| good	0.135 \| good
2026-03-12T05:00:00.000Z	41 \| good	3.979 \| good	9.69 \| good	43.899 \| good	0.166 \| good	1.514 \| good	0.132 \| good
2026-03-12T06:00:00.000Z	42 \| good	3.91 \| good	10.22 \| good	44.588 \| good	0.204 \| good	1.956 \| good	0.132 \| good
2026-03-12T07:00:00.000Z	42 \| good	3.933 \| good	11.303 \| good	45.014 \| good	0.256 \| good	2.465 \| good	0.133 \| good
2026-03-12T08:00:00.000Z	41 \| good	4.235 \| good	13.229 \| good	44.038 \| good	0.307 \| good	3.964 \| good	0.137 \| good
2026-03-12T09:00:00.000Z	41 \| good	4.188 \| good	14.938 \| good	43.858 \| good	0.361 \| good	4.452 \| good	0.136 \| good
2026-03-12T10:00:00.000Z	42 \| good	3.905 \| good	10.904 \| good	45.14 \| good	0.313 \| good	4.267 \| good	0.135 \| good
2026-03-12T11:00:00.000Z	43 \| good	3.78 \| good	10.612 \| good	45.641 \| good	0.281 \| good	3.799 \| good	0.132 \| good
2026-03-12T12:00:00.000Z	42 \| good	4.295 \| good	9.845 \| good	45.384 \| good	0.246 \| good	3.411 \| good	0.129 \| good
2026-03-12T13:00:00.000Z	42 \| good	4.134 \| good	9.652 \| good	45.385 \| good	0.217 \| good	3.342 \| good	0.129 \| good
2026-03-12T14:00:00.000Z	42 \| good	3.99 \| good	9.59 \| good	45.492 \| good	0.182 \| good	3.488 \| good	0.129 \| good
2026-03-12T15:00:00.000Z	42 \| good	3.948 \| good	8.827 \| good	44.599 \| good	0.174 \| good	3.656 \| good	0.128 \| good
2026-03-12T16:00:00.000Z	40 \| good	3.873 \| good	8.142 \| good	43.389 \| good	0.169 \| good	4.048 \| good	0.126 \| good
2026-03-12T17:00:00.000Z	38 \| good	3.887 \| good	7.568 \| good	41.371 \| good	0.153 \| good	4.439 \| good	0.125 \| good
2026-03-12T18:00:00.000Z	37 \| good	3.746 \| good	7.29 \| good	39.595 \| good	0.173 \| good	4.768 \| good	0.124 \| good
2026-03-12T19:00:00.000Z	36 \| good	3.559 \| good	6.853 \| good	39.325 \| good	0.179 \| good	4.225 \| good	0.123 \| good
2026-03-12T20:00:00.000Z	36 \| good	3.644 \| good	6.935 \| good	38.84 \| good	0.188 \| good	3.74 \| good	0.119 \| good

Live air quality index in Hertford, Hertfordshire today

Major air pollutants in Hertford, Hertfordshire

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Hertford, Hertfordshire air quality forecast and history

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Hertford, Hertfordshire air quality map: Stay updated on AQI near you

Air quality in nearby cities

Ware, Hertfordshire

Hoddesdon, Hertfordshire

Welwyn Garden City, Hertfordshire

Hatfield, Hertfordshire

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How accurate is Hertfordshire, UK air quality data?

Air quality levels in UK

Frequently asked questions

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What is the PM2.5 level in Hertford, Hertfordshire at the moment?

What is the PM10 level in Hertford, Hertfordshire at the moment?

What is the carbon monoxide (CO) level in Hertford, Hertfordshire at the moment?

What is the sulfur dioxide (SO2) level in Hertford, Hertfordshire at the moment?

What is the ozone (O3) level in Hertford, Hertfordshire at the moment?

What is the nitrogen dioxide (NO2) level in Hertford, Hertfordshire at the moment?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in Hertford, Hertfordshire at the moment?

What is the PM₁₀ level in Hertford, Hertfordshire at the moment?

What is the sulfur dioxide (SO₂) level in Hertford, Hertfordshire at the moment?

What is the ozone (O₃) level in Hertford, Hertfordshire at the moment?

What is the nitrogen dioxide (NO₂) level in Hertford, Hertfordshire at the moment?