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

Currently, Letchworth, Hertfordshire has a sulfur dioxide (SO2) concentration of 1.057 ppb.

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

The current ozone (O3) level in Letchworth, Hertfordshire at the moment is 37.675 ppm.

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

Nitrogen dioxide (NO2) level in Letchworth, Hertfordshire at the moment is 17.351 ppb.

Real-time air quality index in Letchworth, Hertfordshire today

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

Stay updated with real-time air quality in Letchworth, 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

Letchworth, Hertfordshire

Last updated: ... (Local time)

Major air pollutants in Letchworth, Hertfordshire

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

11.52 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

23.44 μg/m³

155

255

425

605+

Ozone (O₃)

52.15 ppb

201

201+

Sulfur Dioxide (SO₂)

1.74 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.41 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.02 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

Letchworth, Hertfordshire

Get Live Pollen Counts

Letchworth, Hertfordshire

Scroll To Air Quality Map

Track live Letchworth, Hertfordshire air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-18T23:00:00.000Z	38 \| good	6.569 \| good	11.749 \| good	38.362 \| good	0.962 \| good	5.988 \| good	0.369 \| good
2025-06-19T00:00:00.000Z	36 \| good	6.156 \| good	9.795 \| good	38.594 \| good	1.078 \| good	7.902 \| good	0.329 \| good
2025-06-19T01:00:00.000Z	44 \| good	8.209 \| good	17.893 \| good	36.113 \| good	1.033 \| good	5.944 \| good	0.295 \| good
2025-06-19T02:00:00.000Z	38 \| good	6.661 \| good	14.02 \| good	37.581 \| good	1.121 \| good	7.452 \| good	0.322 \| good
2025-06-19T03:00:00.000Z	44 \| good	7.797 \| good	18.249 \| good	34.66 \| good	1.127 \| good	9.689 \| good	0.348 \| good
2025-06-19T04:00:00.000Z	49 \| good	9.069 \| good	20.263 \| good	37.675 \| good	1.057 \| good	17.351 \| good	0.356 \| good
2025-06-19T05:00:00.000Z	52 \| moderate	9.846 \| good	16.82 \| good	25.628 \| good	1.105 \| good	11.386 \| good	0.027 \| good
2025-06-19T06:00:00.000Z	44 \| good	7.654 \| good	15.167 \| good	28.45 \| good	1.099 \| good	13.303 \| good	0.02 \| good
2025-06-19T07:00:00.000Z	38 \| good	7.164 \| good	18.313 \| good	27.668 \| good	1.011 \| good	11.803 \| good	0.019 \| good
2025-06-19T08:00:00.000Z	49 \| good	8.514 \| good	14.37 \| good	22.399 \| good	1.105 \| good	6.114 \| good	0.019 \| good
2025-06-19T09:00:00.000Z	54 \| moderate	11.003 \| good	15.676 \| good	26.093 \| good	1.26 \| good	15.292 \| good	0.019 \| good
2025-06-19T10:00:00.000Z	35 \| good	6.048 \| good	16.557 \| good	37.778 \| good	1.329 \| good	6.191 \| good	0.019 \| good
2025-06-19T11:00:00.000Z	49 \| good	9.226 \| good	17.26 \| good	20.918 \| good	0.993 \| good	3.392 \| good	0.018 \| good
2025-06-19T12:00:00.000Z	44 \| good	7.78 \| good	19.151 \| good	24.99 \| good	1.233 \| good	4.854 \| good	0.013 \| good
2025-06-19T13:00:00.000Z	44 \| good	7.884 \| good	22.329 \| good	34.462 \| good	1.051 \| good	6.631 \| good	0.018 \| good
2025-06-19T14:00:00.000Z	49 \| good	8.793 \| good	17.293 \| good	40.238 \| good	1.286 \| good	9.185 \| good	0.018 \| good
2025-06-19T15:00:00.000Z	49 \| good	8.84 \| good	14.798 \| good	51.926 \| good	1.116 \| good	7.983 \| good	0.019 \| good
2025-06-19T16:00:00.000Z	49 \| good	9.257 \| good	14.507 \| good	51.121 \| good	1.115 \| good	8.863 \| good	0.018 \| good
2025-06-19T17:00:00.000Z	61 \| moderate	10.099 \| good	19.066 \| good	57.76 \| fine	1.331 \| good	11.378 \| good	0.019 \| good
2025-06-19T18:00:00.000Z	61 \| moderate	9.221 \| good	19.592 \| good	57.537 \| fine	1.416 \| good	6.615 \| good	0.02 \| good
2025-06-19T19:00:00.000Z	49 \| good	8.713 \| good	24.264 \| good	49.627 \| good	1.355 \| good	10.602 \| good	0.02 \| good
2025-06-19T20:00:00.000Z	40 \| good	5.98 \| good	27.843 \| good	43.1 \| good	1.25 \| good	13.234 \| good	0.021 \| good
2025-06-19T21:00:00.000Z	71 \| moderate	11.213 \| good	18.474 \| good	61.285 \| fine	1.565 \| good	7.352 \| good	0.022 \| good
2025-06-19T22:00:00.000Z	49 \| good	9.025 \| good	19.2 \| good	51.109 \| good	1.445 \| good	8.328 \| good	0.017 \| good
2025-06-19T23:00:00.000Z	45 \| good	8.359 \| good	21.683 \| good	48.878 \| good	1.428 \| good	11.889 \| good	0.018 \| good
2025-06-20T00:00:00.000Z	61 \| moderate	6.244 \| good	40.465 \| good	57.917 \| fine	1.215 \| good	9.197 \| good	0.249 \| good
2025-06-20T01:00:00.000Z	52 \| moderate	10.411 \| good	36.263 \| good	46.461 \| good	1.278 \| good	8.93 \| good	0.24 \| good
2025-06-20T02:00:00.000Z	54 \| moderate	11.303 \| good	17.087 \| good	51.05 \| good	1.281 \| good	6.218 \| good	0.295 \| good
2025-06-20T03:00:00.000Z	44 \| good	7.997 \| good	19.377 \| good	45.856 \| good	1.225 \| good	4.219 \| good	0.239 \| good
2025-06-20T04:00:00.000Z	60 \| moderate	14.132 \| fine	28.477 \| good	37.799 \| good	1.027 \| good	4.015 \| good	0.244 \| good
2025-06-20T05:00:00.000Z	54 \| moderate	10.913 \| good	18.453 \| good	35.817 \| good	1.314 \| good	4.507 \| good	0.019 \| good
2025-06-20T06:00:00.000Z	52 \| moderate	10.041 \| good	23.237 \| good	40.201 \| good	1.389 \| good	5.486 \| good	0.02 \| good
2025-06-20T07:00:00.000Z	54 \| moderate	11.318 \| good	19.104 \| good	31.921 \| good	1.464 \| good	5.879 \| good	0.021 \| good
2025-06-20T08:00:00.000Z	58 \| moderate	13.057 \| fine	19.258 \| good	31.86 \| good	1.594 \| good	5.613 \| good	0.02 \| good
2025-06-20T09:00:00.000Z	56 \| moderate	12.2 \| fine	35.34 \| good	32.701 \| good	1.743 \| good	7.797 \| good	0.019 \| good
2025-06-20T10:00:00.000Z	60 \| moderate	13.584 \| fine	20.583 \| good	37.15 \| good	1.593 \| good	6.775 \| good	0.019 \| good
2025-06-20T11:00:00.000Z	58 \| moderate	12.68 \| fine	33.66 \| good	37.859 \| good	1.584 \| good	8.165 \| good	0.019 \| good
2025-06-20T12:00:00.000Z	52 \| moderate	9.919 \| good	31.06 \| good	36.332 \| good	1.336 \| good	4.376 \| good	0.018 \| good
2025-06-20T13:00:00.000Z	60 \| moderate	14.2 \| fine	27.76 \| good	41.795 \| good	1.373 \| good	5.284 \| good	0.013 \| good
2025-06-20T14:00:00.000Z	49 \| good	8.64 \| good	36.515 \| good	41.086 \| good	1.352 \| good	5.25 \| good	0.017 \| good
2025-06-20T15:00:00.000Z	60 \| moderate	14.4 \| fine	27.345 \| good	45.742 \| good	1.443 \| good	5.435 \| good	0.017 \| good
2025-06-20T16:00:00.000Z	52 \| moderate	10.071 \| good	20.608 \| good	48.02 \| good	1.463 \| good	5.335 \| good	0.017 \| good
2025-06-20T17:00:00.000Z	52 \| moderate	10.071 \| good	19.951 \| good	45.667 \| good	1.736 \| good	5.194 \| good	0.018 \| good
2025-06-20T18:00:00.000Z	49 \| good	9.183 \| good	20.065 \| good	52.214 \| good	1.64 \| good	4.883 \| good	0.018 \| good
2025-06-20T19:00:00.000Z	49 \| good	9.066 \| good	20.559 \| good	47.235 \| good	1.534 \| good	3.905 \| good	0.019 \| good
2025-06-20T20:00:00.000Z	49 \| good	9.31 \| good	26.896 \| good	44.967 \| good	1.905 \| good	6.412 \| good	0.018 \| good
2025-06-20T21:00:00.000Z	56 \| moderate	11.521 \| good	23.443 \| good	52.153 \| good	1.743 \| good	3.412 \| good	0.018 \| good
2025-06-20T22:00:00.000Z	56 \| moderate	11.521 \| good	23.443 \| good	52.153 \| good	1.743 \| good	3.412 \| good	0.018 \| good
2025-06-19T05:00:00.000Z	64 \| moderate	15.936 \| fine	20.499 \| good	18.716 \| good	0.272 \| good	7.308 \| good	0.163 \| good
2025-06-19T06:00:00.000Z	67 \| moderate	18.142 \| fine	21.564 \| good	19.607 \| good	0.39 \| good	6.681 \| good	0.166 \| good
2025-06-19T07:00:00.000Z	64 \| moderate	16.117 \| fine	19.883 \| good	21.087 \| good	0.496 \| good	6.242 \| good	0.167 \| good
2025-06-19T08:00:00.000Z	60 \| moderate	14.034 \| fine	17.361 \| good	24.59 \| good	0.549 \| good	6.477 \| good	0.166 \| good
2025-06-19T09:00:00.000Z	54 \| moderate	11.494 \| good	17.943 \| good	32.895 \| good	0.602 \| good	6.583 \| good	0.163 \| good
2025-06-19T10:00:00.000Z	52 \| moderate	9.845 \| good	16.508 \| good	40.812 \| good	0.515 \| good	5.283 \| good	0.159 \| good
2025-06-19T11:00:00.000Z	52 \| moderate	10.391 \| good	14.273 \| good	50.062 \| good	0.429 \| good	3.813 \| good	0.156 \| good
2025-06-19T12:00:00.000Z	61 \| moderate	9.179 \| good	13.149 \| good	57.986 \| fine	0.356 \| good	2.707 \| good	0.155 \| good
2025-06-19T13:00:00.000Z	80 \| moderate	9.321 \| good	12.245 \| good	64.248 \| fine	0.323 \| good	2.048 \| good	0.154 \| good
2025-06-19T14:00:00.000Z	87 \| moderate	9.259 \| good	12.214 \| good	65.835 \| fine	0.298 \| good	1.789 \| good	0.151 \| good
2025-06-19T15:00:00.000Z	97 \| moderate	9.368 \| good	12.26 \| good	68.77 \| fine	0.284 \| good	1.743 \| good	0.15 \| good
2025-06-19T16:00:00.000Z	97 \| moderate	9.129 \| good	12.732 \| good	69.171 \| fine	0.278 \| good	2.078 \| good	0.152 \| good
2025-06-19T17:00:00.000Z	93 \| moderate	9.355 \| good	13.091 \| good	68.056 \| fine	0.286 \| good	2.41 \| good	0.155 \| good
2025-06-19T18:00:00.000Z	74 \| moderate	9.252 \| good	11.825 \| good	62.012 \| fine	0.293 \| good	2.821 \| good	0.154 \| good
2025-06-19T19:00:00.000Z	47 \| good	7.813 \| good	9.609 \| good	50.892 \| good	0.295 \| good	3.434 \| good	0.145 \| good
2025-06-19T20:00:00.000Z	44 \| good	7.584 \| good	9.025 \| good	44.612 \| good	0.345 \| good	4.172 \| good	0.144 \| good
2025-06-19T21:00:00.000Z	39 \| good	6.911 \| good	9.229 \| good	42.259 \| good	0.325 \| good	4.845 \| good	0.141 \| good
2025-06-19T22:00:00.000Z	38 \| good	6.644 \| good	10.511 \| good	39.526 \| good	0.288 \| good	4.676 \| good	0.138 \| good
2025-06-19T23:00:00.000Z	34 \| good	6.5 \| good	10.011 \| good	36.874 \| good	0.253 \| good	4.744 \| good	0.137 \| good
2025-06-20T00:00:00.000Z	33 \| good	6.291 \| good	9.861 \| good	34.87 \| good	0.225 \| good	5.257 \| good	0.137 \| good
2025-06-20T01:00:00.000Z	38 \| good	6.822 \| good	10.257 \| good	32.939 \| good	0.203 \| good	4.955 \| good	0.134 \| good
2025-06-20T02:00:00.000Z	38 \| good	7.213 \| good	10.389 \| good	30.68 \| good	0.182 \| good	4.312 \| good	0.131 \| good
2025-06-20T03:00:00.000Z	38 \| good	7.469 \| good	10.668 \| good	29.468 \| good	0.165 \| good	3.958 \| good	0.132 \| good
2025-06-20T04:00:00.000Z	44 \| good	7.922 \| good	11.435 \| good	27.97 \| good	0.198 \| good	4.648 \| good	0.133 \| good
2025-06-20T05:00:00.000Z	49 \| good	8.531 \| good	13.226 \| good	26.612 \| good	0.297 \| good	4.732 \| good	0.145 \| good
2025-06-20T06:00:00.000Z	52 \| moderate	9.584 \| good	14.458 \| good	25.234 \| good	0.489 \| good	5.337 \| good	0.151 \| good
2025-06-20T07:00:00.000Z	52 \| moderate	9.86 \| good	15.357 \| good	24.135 \| good	0.541 \| good	7.23 \| good	0.157 \| good
2025-06-20T08:00:00.000Z	44 \| good	8.484 \| good	13.267 \| good	27.211 \| good	0.588 \| good	6.882 \| good	0.156 \| good
2025-06-20T09:00:00.000Z	38 \| good	7.461 \| good	11.214 \| good	31.459 \| good	0.59 \| good	6.195 \| good	0.155 \| good
2025-06-20T10:00:00.000Z	38 \| good	6.983 \| good	9.812 \| good	35.578 \| good	0.529 \| good	5.064 \| good	0.15 \| good
2025-06-20T11:00:00.000Z	37 \| good	6.359 \| good	9.697 \| good	39.522 \| good	0.45 \| good	4.057 \| good	0.148 \| good
2025-06-20T12:00:00.000Z	40 \| good	6.493 \| good	9.846 \| good	43.215 \| good	0.41 \| good	3.272 \| good	0.144 \| good
2025-06-20T13:00:00.000Z	41 \| good	6.011 \| good	9.313 \| good	44.204 \| good	0.364 \| good	2.641 \| good	0.142 \| good
2025-06-20T14:00:00.000Z	43 \| good	6.215 \| good	8.65 \| good	45.714 \| good	0.36 \| good	2.439 \| good	0.144 \| good
2025-06-20T15:00:00.000Z	44 \| good	6.29 \| good	8.348 \| good	48.003 \| good	0.392 \| good	2.436 \| good	0.143 \| good
2025-06-20T16:00:00.000Z	44 \| good	6.316 \| good	8.283 \| good	48.162 \| good	0.412 \| good	2.582 \| good	0.144 \| good
2025-06-20T17:00:00.000Z	44 \| good	6.437 \| good	8.224 \| good	47.068 \| good	0.396 \| good	2.794 \| good	0.143 \| good
2025-06-20T18:00:00.000Z	43 \| good	6.339 \| good	7.923 \| good	45.525 \| good	0.458 \| good	2.901 \| good	0.147 \| good
2025-06-20T19:00:00.000Z	39 \| good	6.272 \| good	7.99 \| good	42.11 \| good	0.537 \| good	3.086 \| good	0.147 \| good
2025-06-20T20:00:00.000Z	38 \| good	6.943 \| good	8.565 \| good	39.1 \| good	0.572 \| good	4.004 \| good	0.145 \| good
2025-06-20T21:00:00.000Z	44 \| good	7.741 \| good	9.848 \| good	39.832 \| good	0.59 \| good	5.672 \| good	0.15 \| good
2025-06-20T22:00:00.000Z	49 \| good	8.625 \| good	12.474 \| good	38.304 \| good	0.578 \| good	6.534 \| good	0.154 \| good
2025-06-20T23:00:00.000Z	49 \| good	9.309 \| good	12.331 \| good	34.478 \| good	0.548 \| good	7.151 \| good	0.153 \| good
2025-06-21T00:00:00.000Z	54 \| moderate	10.957 \| good	14.756 \| good	35.031 \| good	0.499 \| good	6.947 \| good	0.156 \| good
2025-06-21T01:00:00.000Z	58 \| moderate	12.553 \| fine	16.18 \| good	33.083 \| good	0.413 \| good	7.094 \| good	0.16 \| good
2025-06-21T02:00:00.000Z	60 \| moderate	14.122 \| fine	17.156 \| good	30.106 \| good	0.362 \| good	7.754 \| good	0.165 \| good
2025-06-21T03:00:00.000Z	58 \| moderate	12.833 \| fine	18.655 \| good	26.373 \| good	0.367 \| good	7.322 \| good	0.17 \| good
2025-06-21T04:00:00.000Z	58 \| moderate	12.749 \| fine	18.01 \| good	21.544 \| good	0.398 \| good	7.919 \| good	0.173 \| good

Letchworth

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

0.29ppm

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 Letchworth, Hertfordshire?

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

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

In the past 24 hours, the air quality in Letchworth, Hertfordshire was at its worst at 09:00:00 on 2025-06-18.

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

In the last 24 hours, the best air quality in Letchworth, Hertfordshire was observed at 01:00:00 on 2025-06-18.

What is the AQI in Letchworth, Hertfordshire right now?

As of now, the AQI in Letchworth, Hertfordshire is 49, indicating Good conditions.

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

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

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

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

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

PM_2.5 levels in Letchworth, Hertfordshire are currently 9.069 μg/m³.

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

The PM₁₀ concentration in Letchworth, Hertfordshire is 20.263 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Letchworth, Hertfordshire is 0.356 ppm.

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

Currently, Letchworth, Hertfordshire has a sulfur dioxide (SO₂) concentration of 1.057 ppb.

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

The current ozone (O₃) level in Letchworth, Hertfordshire at the moment is 37.675 ppm.

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

Nitrogen dioxide (NO₂) level in Letchworth, Hertfordshire at the moment is 17.351 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-18T23:00:00.000Z	38 \| good	6.569 \| good	11.749 \| good	38.362 \| good	0.962 \| good	5.988 \| good	0.369 \| good
2025-06-19T00:00:00.000Z	36 \| good	6.156 \| good	9.795 \| good	38.594 \| good	1.078 \| good	7.902 \| good	0.329 \| good
2025-06-19T01:00:00.000Z	44 \| good	8.209 \| good	17.893 \| good	36.113 \| good	1.033 \| good	5.944 \| good	0.295 \| good
2025-06-19T02:00:00.000Z	38 \| good	6.661 \| good	14.02 \| good	37.581 \| good	1.121 \| good	7.452 \| good	0.322 \| good
2025-06-19T03:00:00.000Z	44 \| good	7.797 \| good	18.249 \| good	34.66 \| good	1.127 \| good	9.689 \| good	0.348 \| good
2025-06-19T04:00:00.000Z	49 \| good	9.069 \| good	20.263 \| good	37.675 \| good	1.057 \| good	17.351 \| good	0.356 \| good
2025-06-19T05:00:00.000Z	52 \| moderate	9.846 \| good	16.82 \| good	25.628 \| good	1.105 \| good	11.386 \| good	0.027 \| good
2025-06-19T06:00:00.000Z	44 \| good	7.654 \| good	15.167 \| good	28.45 \| good	1.099 \| good	13.303 \| good	0.02 \| good
2025-06-19T07:00:00.000Z	38 \| good	7.164 \| good	18.313 \| good	27.668 \| good	1.011 \| good	11.803 \| good	0.019 \| good
2025-06-19T08:00:00.000Z	49 \| good	8.514 \| good	14.37 \| good	22.399 \| good	1.105 \| good	6.114 \| good	0.019 \| good
2025-06-19T09:00:00.000Z	54 \| moderate	11.003 \| good	15.676 \| good	26.093 \| good	1.26 \| good	15.292 \| good	0.019 \| good
2025-06-19T10:00:00.000Z	35 \| good	6.048 \| good	16.557 \| good	37.778 \| good	1.329 \| good	6.191 \| good	0.019 \| good
2025-06-19T11:00:00.000Z	49 \| good	9.226 \| good	17.26 \| good	20.918 \| good	0.993 \| good	3.392 \| good	0.018 \| good
2025-06-19T12:00:00.000Z	44 \| good	7.78 \| good	19.151 \| good	24.99 \| good	1.233 \| good	4.854 \| good	0.013 \| good
2025-06-19T13:00:00.000Z	44 \| good	7.884 \| good	22.329 \| good	34.462 \| good	1.051 \| good	6.631 \| good	0.018 \| good
2025-06-19T14:00:00.000Z	49 \| good	8.793 \| good	17.293 \| good	40.238 \| good	1.286 \| good	9.185 \| good	0.018 \| good
2025-06-19T15:00:00.000Z	49 \| good	8.84 \| good	14.798 \| good	51.926 \| good	1.116 \| good	7.983 \| good	0.019 \| good
2025-06-19T16:00:00.000Z	49 \| good	9.257 \| good	14.507 \| good	51.121 \| good	1.115 \| good	8.863 \| good	0.018 \| good
2025-06-19T17:00:00.000Z	61 \| moderate	10.099 \| good	19.066 \| good	57.76 \| fine	1.331 \| good	11.378 \| good	0.019 \| good
2025-06-19T18:00:00.000Z	61 \| moderate	9.221 \| good	19.592 \| good	57.537 \| fine	1.416 \| good	6.615 \| good	0.02 \| good
2025-06-19T19:00:00.000Z	49 \| good	8.713 \| good	24.264 \| good	49.627 \| good	1.355 \| good	10.602 \| good	0.02 \| good
2025-06-19T20:00:00.000Z	40 \| good	5.98 \| good	27.843 \| good	43.1 \| good	1.25 \| good	13.234 \| good	0.021 \| good
2025-06-19T21:00:00.000Z	71 \| moderate	11.213 \| good	18.474 \| good	61.285 \| fine	1.565 \| good	7.352 \| good	0.022 \| good
2025-06-19T22:00:00.000Z	49 \| good	9.025 \| good	19.2 \| good	51.109 \| good	1.445 \| good	8.328 \| good	0.017 \| good
2025-06-19T23:00:00.000Z	45 \| good	8.359 \| good	21.683 \| good	48.878 \| good	1.428 \| good	11.889 \| good	0.018 \| good
2025-06-20T00:00:00.000Z	61 \| moderate	6.244 \| good	40.465 \| good	57.917 \| fine	1.215 \| good	9.197 \| good	0.249 \| good
2025-06-20T01:00:00.000Z	52 \| moderate	10.411 \| good	36.263 \| good	46.461 \| good	1.278 \| good	8.93 \| good	0.24 \| good
2025-06-20T02:00:00.000Z	54 \| moderate	11.303 \| good	17.087 \| good	51.05 \| good	1.281 \| good	6.218 \| good	0.295 \| good
2025-06-20T03:00:00.000Z	44 \| good	7.997 \| good	19.377 \| good	45.856 \| good	1.225 \| good	4.219 \| good	0.239 \| good
2025-06-20T04:00:00.000Z	60 \| moderate	14.132 \| fine	28.477 \| good	37.799 \| good	1.027 \| good	4.015 \| good	0.244 \| good
2025-06-20T05:00:00.000Z	54 \| moderate	10.913 \| good	18.453 \| good	35.817 \| good	1.314 \| good	4.507 \| good	0.019 \| good
2025-06-20T06:00:00.000Z	52 \| moderate	10.041 \| good	23.237 \| good	40.201 \| good	1.389 \| good	5.486 \| good	0.02 \| good
2025-06-20T07:00:00.000Z	54 \| moderate	11.318 \| good	19.104 \| good	31.921 \| good	1.464 \| good	5.879 \| good	0.021 \| good
2025-06-20T08:00:00.000Z	58 \| moderate	13.057 \| fine	19.258 \| good	31.86 \| good	1.594 \| good	5.613 \| good	0.02 \| good
2025-06-20T09:00:00.000Z	56 \| moderate	12.2 \| fine	35.34 \| good	32.701 \| good	1.743 \| good	7.797 \| good	0.019 \| good
2025-06-20T10:00:00.000Z	60 \| moderate	13.584 \| fine	20.583 \| good	37.15 \| good	1.593 \| good	6.775 \| good	0.019 \| good
2025-06-20T11:00:00.000Z	58 \| moderate	12.68 \| fine	33.66 \| good	37.859 \| good	1.584 \| good	8.165 \| good	0.019 \| good
2025-06-20T12:00:00.000Z	52 \| moderate	9.919 \| good	31.06 \| good	36.332 \| good	1.336 \| good	4.376 \| good	0.018 \| good
2025-06-20T13:00:00.000Z	60 \| moderate	14.2 \| fine	27.76 \| good	41.795 \| good	1.373 \| good	5.284 \| good	0.013 \| good
2025-06-20T14:00:00.000Z	49 \| good	8.64 \| good	36.515 \| good	41.086 \| good	1.352 \| good	5.25 \| good	0.017 \| good
2025-06-20T15:00:00.000Z	60 \| moderate	14.4 \| fine	27.345 \| good	45.742 \| good	1.443 \| good	5.435 \| good	0.017 \| good
2025-06-20T16:00:00.000Z	52 \| moderate	10.071 \| good	20.608 \| good	48.02 \| good	1.463 \| good	5.335 \| good	0.017 \| good
2025-06-20T17:00:00.000Z	52 \| moderate	10.071 \| good	19.951 \| good	45.667 \| good	1.736 \| good	5.194 \| good	0.018 \| good
2025-06-20T18:00:00.000Z	49 \| good	9.183 \| good	20.065 \| good	52.214 \| good	1.64 \| good	4.883 \| good	0.018 \| good
2025-06-20T19:00:00.000Z	49 \| good	9.066 \| good	20.559 \| good	47.235 \| good	1.534 \| good	3.905 \| good	0.019 \| good
2025-06-20T20:00:00.000Z	49 \| good	9.31 \| good	26.896 \| good	44.967 \| good	1.905 \| good	6.412 \| good	0.018 \| good
2025-06-20T21:00:00.000Z	56 \| moderate	11.521 \| good	23.443 \| good	52.153 \| good	1.743 \| good	3.412 \| good	0.018 \| good
2025-06-20T22:00:00.000Z	56 \| moderate	11.521 \| good	23.443 \| good	52.153 \| good	1.743 \| good	3.412 \| good	0.018 \| good
2025-06-19T05:00:00.000Z	64 \| moderate	15.936 \| fine	20.499 \| good	18.716 \| good	0.272 \| good	7.308 \| good	0.163 \| good
2025-06-19T06:00:00.000Z	67 \| moderate	18.142 \| fine	21.564 \| good	19.607 \| good	0.39 \| good	6.681 \| good	0.166 \| good
2025-06-19T07:00:00.000Z	64 \| moderate	16.117 \| fine	19.883 \| good	21.087 \| good	0.496 \| good	6.242 \| good	0.167 \| good
2025-06-19T08:00:00.000Z	60 \| moderate	14.034 \| fine	17.361 \| good	24.59 \| good	0.549 \| good	6.477 \| good	0.166 \| good
2025-06-19T09:00:00.000Z	54 \| moderate	11.494 \| good	17.943 \| good	32.895 \| good	0.602 \| good	6.583 \| good	0.163 \| good
2025-06-19T10:00:00.000Z	52 \| moderate	9.845 \| good	16.508 \| good	40.812 \| good	0.515 \| good	5.283 \| good	0.159 \| good
2025-06-19T11:00:00.000Z	52 \| moderate	10.391 \| good	14.273 \| good	50.062 \| good	0.429 \| good	3.813 \| good	0.156 \| good
2025-06-19T12:00:00.000Z	61 \| moderate	9.179 \| good	13.149 \| good	57.986 \| fine	0.356 \| good	2.707 \| good	0.155 \| good
2025-06-19T13:00:00.000Z	80 \| moderate	9.321 \| good	12.245 \| good	64.248 \| fine	0.323 \| good	2.048 \| good	0.154 \| good
2025-06-19T14:00:00.000Z	87 \| moderate	9.259 \| good	12.214 \| good	65.835 \| fine	0.298 \| good	1.789 \| good	0.151 \| good
2025-06-19T15:00:00.000Z	97 \| moderate	9.368 \| good	12.26 \| good	68.77 \| fine	0.284 \| good	1.743 \| good	0.15 \| good
2025-06-19T16:00:00.000Z	97 \| moderate	9.129 \| good	12.732 \| good	69.171 \| fine	0.278 \| good	2.078 \| good	0.152 \| good
2025-06-19T17:00:00.000Z	93 \| moderate	9.355 \| good	13.091 \| good	68.056 \| fine	0.286 \| good	2.41 \| good	0.155 \| good
2025-06-19T18:00:00.000Z	74 \| moderate	9.252 \| good	11.825 \| good	62.012 \| fine	0.293 \| good	2.821 \| good	0.154 \| good
2025-06-19T19:00:00.000Z	47 \| good	7.813 \| good	9.609 \| good	50.892 \| good	0.295 \| good	3.434 \| good	0.145 \| good
2025-06-19T20:00:00.000Z	44 \| good	7.584 \| good	9.025 \| good	44.612 \| good	0.345 \| good	4.172 \| good	0.144 \| good
2025-06-19T21:00:00.000Z	39 \| good	6.911 \| good	9.229 \| good	42.259 \| good	0.325 \| good	4.845 \| good	0.141 \| good
2025-06-19T22:00:00.000Z	38 \| good	6.644 \| good	10.511 \| good	39.526 \| good	0.288 \| good	4.676 \| good	0.138 \| good
2025-06-19T23:00:00.000Z	34 \| good	6.5 \| good	10.011 \| good	36.874 \| good	0.253 \| good	4.744 \| good	0.137 \| good
2025-06-20T00:00:00.000Z	33 \| good	6.291 \| good	9.861 \| good	34.87 \| good	0.225 \| good	5.257 \| good	0.137 \| good
2025-06-20T01:00:00.000Z	38 \| good	6.822 \| good	10.257 \| good	32.939 \| good	0.203 \| good	4.955 \| good	0.134 \| good
2025-06-20T02:00:00.000Z	38 \| good	7.213 \| good	10.389 \| good	30.68 \| good	0.182 \| good	4.312 \| good	0.131 \| good
2025-06-20T03:00:00.000Z	38 \| good	7.469 \| good	10.668 \| good	29.468 \| good	0.165 \| good	3.958 \| good	0.132 \| good
2025-06-20T04:00:00.000Z	44 \| good	7.922 \| good	11.435 \| good	27.97 \| good	0.198 \| good	4.648 \| good	0.133 \| good
2025-06-20T05:00:00.000Z	49 \| good	8.531 \| good	13.226 \| good	26.612 \| good	0.297 \| good	4.732 \| good	0.145 \| good
2025-06-20T06:00:00.000Z	52 \| moderate	9.584 \| good	14.458 \| good	25.234 \| good	0.489 \| good	5.337 \| good	0.151 \| good
2025-06-20T07:00:00.000Z	52 \| moderate	9.86 \| good	15.357 \| good	24.135 \| good	0.541 \| good	7.23 \| good	0.157 \| good
2025-06-20T08:00:00.000Z	44 \| good	8.484 \| good	13.267 \| good	27.211 \| good	0.588 \| good	6.882 \| good	0.156 \| good
2025-06-20T09:00:00.000Z	38 \| good	7.461 \| good	11.214 \| good	31.459 \| good	0.59 \| good	6.195 \| good	0.155 \| good
2025-06-20T10:00:00.000Z	38 \| good	6.983 \| good	9.812 \| good	35.578 \| good	0.529 \| good	5.064 \| good	0.15 \| good
2025-06-20T11:00:00.000Z	37 \| good	6.359 \| good	9.697 \| good	39.522 \| good	0.45 \| good	4.057 \| good	0.148 \| good
2025-06-20T12:00:00.000Z	40 \| good	6.493 \| good	9.846 \| good	43.215 \| good	0.41 \| good	3.272 \| good	0.144 \| good
2025-06-20T13:00:00.000Z	41 \| good	6.011 \| good	9.313 \| good	44.204 \| good	0.364 \| good	2.641 \| good	0.142 \| good
2025-06-20T14:00:00.000Z	43 \| good	6.215 \| good	8.65 \| good	45.714 \| good	0.36 \| good	2.439 \| good	0.144 \| good
2025-06-20T15:00:00.000Z	44 \| good	6.29 \| good	8.348 \| good	48.003 \| good	0.392 \| good	2.436 \| good	0.143 \| good
2025-06-20T16:00:00.000Z	44 \| good	6.316 \| good	8.283 \| good	48.162 \| good	0.412 \| good	2.582 \| good	0.144 \| good
2025-06-20T17:00:00.000Z	44 \| good	6.437 \| good	8.224 \| good	47.068 \| good	0.396 \| good	2.794 \| good	0.143 \| good
2025-06-20T18:00:00.000Z	43 \| good	6.339 \| good	7.923 \| good	45.525 \| good	0.458 \| good	2.901 \| good	0.147 \| good
2025-06-20T19:00:00.000Z	39 \| good	6.272 \| good	7.99 \| good	42.11 \| good	0.537 \| good	3.086 \| good	0.147 \| good
2025-06-20T20:00:00.000Z	38 \| good	6.943 \| good	8.565 \| good	39.1 \| good	0.572 \| good	4.004 \| good	0.145 \| good
2025-06-20T21:00:00.000Z	44 \| good	7.741 \| good	9.848 \| good	39.832 \| good	0.59 \| good	5.672 \| good	0.15 \| good
2025-06-20T22:00:00.000Z	49 \| good	8.625 \| good	12.474 \| good	38.304 \| good	0.578 \| good	6.534 \| good	0.154 \| good
2025-06-20T23:00:00.000Z	49 \| good	9.309 \| good	12.331 \| good	34.478 \| good	0.548 \| good	7.151 \| good	0.153 \| good
2025-06-21T00:00:00.000Z	54 \| moderate	10.957 \| good	14.756 \| good	35.031 \| good	0.499 \| good	6.947 \| good	0.156 \| good
2025-06-21T01:00:00.000Z	58 \| moderate	12.553 \| fine	16.18 \| good	33.083 \| good	0.413 \| good	7.094 \| good	0.16 \| good
2025-06-21T02:00:00.000Z	60 \| moderate	14.122 \| fine	17.156 \| good	30.106 \| good	0.362 \| good	7.754 \| good	0.165 \| good
2025-06-21T03:00:00.000Z	58 \| moderate	12.833 \| fine	18.655 \| good	26.373 \| good	0.367 \| good	7.322 \| good	0.17 \| good
2025-06-21T04:00:00.000Z	58 \| moderate	12.749 \| fine	18.01 \| good	21.544 \| good	0.398 \| good	7.919 \| good	0.173 \| good

Real-time air quality index in Letchworth, Hertfordshire today

Major air pollutants in Letchworth, Hertfordshire

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Letchworth, Hertfordshire air quality forecast and history

Get reliable air quality data to drive your business

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

Air quality in nearby cities

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

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

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

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

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

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

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

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

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

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

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

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