What is the current level of PM10 in Waltham Cross, Hertfordshire?

Waltham Cross, Hertfordshire currently has a PM10 concentration of 8.788 μg/m3.

What is the current level of sulfur dioxide (SO2) in Waltham Cross, Hertfordshire?

The current sulfur dioxide (SO2) concentration in Waltham Cross, Hertfordshire is 0.432 ppb.

What is the current level of ozone (O3) in Waltham Cross, Hertfordshire?

Waltham Cross, Hertfordshire currently has an ozone (O3) concentration of 18.664 ppm.

What is the current level of nitrogen dioxide (NO2) in Waltham Cross, Hertfordshire?

The current level of nitrogen dioxide (NO2) in Waltham Cross, Hertfordshire is 4.46 ppb.

Current air quality index in Waltham Cross, Hertfordshire today

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

Stay updated with real-time air quality in Waltham Cross, Hertfordshire featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Good

Waltham Cross, Hertfordshire

Last updated: ... (Local time)

Common air pollutants in Waltham Cross, Hertfordshire

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

1.63 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

5.22 μg/m³

155

255

425

605+

Ozone (O₃)

23.91 ppb

201

201+

Sulfur Dioxide (SO₂)

0.38 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.39 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

Waltham Cross, Hertfordshire

Get Live Pollen Counts

Waltham Cross, Hertfordshire

Scroll To Air Quality Map

Track live Waltham Cross, Hertfordshire air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-16T04:00:00.000Z	27 \| good	5.318 \| good	15.718 \| good	26.585 \| good	0.409 \| good	2.382 \| good	0.364 \| good
2025-09-16T05:00:00.000Z	33 \| good	6.474 \| good	12.576 \| good	26.131 \| good	0.341 \| good	2.056 \| good	0.321 \| good
2025-09-16T06:00:00.000Z	33 \| good	6.244 \| good	15.814 \| good	21.622 \| good	0.342 \| good	2.276 \| good	0.005 \| good
2025-09-16T07:00:00.000Z	33 \| good	5.972 \| good	12.371 \| good	21.334 \| good	0.348 \| good	2.763 \| good	0.005 \| good
2025-09-16T08:00:00.000Z	38 \| good	6.716 \| good	11.964 \| good	22.783 \| good	0.347 \| good	3.289 \| good	0.005 \| good
2025-09-16T09:00:00.000Z	33 \| good	5.553 \| good	13.302 \| good	24.712 \| good	0.443 \| good	3.376 \| good	0.005 \| good
2025-09-16T10:00:00.000Z	27 \| good	5.367 \| good	16.645 \| good	25.229 \| good	0.394 \| good	2.755 \| good	0.005 \| good
2025-09-16T11:00:00.000Z	27 \| good	5.305 \| good	11.935 \| good	22.333 \| good	0.392 \| good	2.921 \| good	0.004 \| good
2025-09-16T12:00:00.000Z	33 \| good	5.804 \| good	12.8 \| good	24.686 \| good	0.378 \| good	2.575 \| good	0.004 \| good
2025-09-16T13:00:00.000Z	33 \| good	5.623 \| good	16.254 \| good	23.38 \| good	0.428 \| good	2.661 \| good	0.004 \| good
2025-09-16T14:00:00.000Z	24 \| good	4.5 \| good	14.515 \| good	25.573 \| good	0.377 \| good	2.488 \| good	0.004 \| good
2025-09-16T15:00:00.000Z	27 \| good	4.826 \| good	13.086 \| good	26.605 \| good	0.391 \| good	2.142 \| good	0.004 \| good
2025-09-16T16:00:00.000Z	27 \| good	5.162 \| good	12.599 \| good	25.768 \| good	0.481 \| good	2.402 \| good	0.004 \| good
2025-09-16T17:00:00.000Z	28 \| good	4.967 \| good	11.618 \| good	29.821 \| good	0.484 \| good	2.189 \| good	0.004 \| good
2025-09-16T18:00:00.000Z	28 \| good	4.783 \| good	13.292 \| good	29.568 \| good	0.365 \| good	2.543 \| good	0.004 \| good
2025-09-16T19:00:00.000Z	27 \| good	5.113 \| good	12.193 \| good	27.389 \| good	0.426 \| good	2.543 \| good	0.005 \| good
2025-09-16T20:00:00.000Z	27 \| good	5.154 \| good	11.049 \| good	26.857 \| good	0.349 \| good	2.763 \| good	0.005 \| good
2025-09-16T21:00:00.000Z	27 \| good	4.689 \| good	11.328 \| good	26.367 \| good	0.349 \| good	3.289 \| good	0.005 \| good
2025-09-16T22:00:00.000Z	27 \| good	4.882 \| good	11.224 \| good	28.153 \| good	0.346 \| good	3.509 \| good	0.004 \| good
2025-09-16T23:00:00.000Z	27 \| good	5.349 \| good	11.583 \| good	26.387 \| good	0.39 \| good	3.242 \| good	0.004 \| good
2025-09-17T00:00:00.000Z	27 \| good	5.084 \| good	11.967 \| good	25.496 \| good	0.405 \| good	8.277 \| good	0.29 \| good
2025-09-17T01:00:00.000Z	22 \| good	4.368 \| good	9.957 \| good	24.107 \| good	0.405 \| good	8.39 \| good	0.339 \| good
2025-09-17T02:00:00.000Z	22 \| good	4.223 \| good	11.573 \| good	22.411 \| good	0.405 \| good	7.038 \| good	0.312 \| good
2025-09-17T03:00:00.000Z	22 \| good	4.388 \| good	11.745 \| good	22.313 \| good	0.406 \| good	7.038 \| good	0.361 \| good
2025-09-17T04:00:00.000Z	22 \| good	4.015 \| good	10.617 \| good	19.419 \| good	0.415 \| good	6.788 \| good	0.37 \| good
2025-09-17T05:00:00.000Z	27 \| good	4.535 \| good	11.921 \| good	21.314 \| good	0.339 \| good	6.714 \| good	0.445 \| good
2025-09-17T06:00:00.000Z	27 \| good	4.898 \| good	9.51 \| good	19.849 \| good	0.34 \| good	6.534 \| good	0.004 \| good
2025-09-17T07:00:00.000Z	27 \| good	4.848 \| good	11.213 \| good	20.402 \| good	0.34 \| good	7.335 \| good	0.004 \| good
2025-09-17T08:00:00.000Z	27 \| good	4.548 \| good	9.795 \| good	20.139 \| good	0.34 \| good	7.948 \| good	0.004 \| good
2025-09-17T09:00:00.000Z	22 \| good	3.758 \| good	12.367 \| good	19.534 \| good	0.34 \| good	7.681 \| good	0.004 \| good
2025-09-17T10:00:00.000Z	22 \| good	3.605 \| good	10.608 \| good	22.087 \| good	0.349 \| good	7.194 \| good	0.004 \| good
2025-09-17T11:00:00.000Z	22 \| good	3.836 \| good	9.736 \| good	20.196 \| good	0.348 \| good	7.469 \| good	0.004 \| good
2025-09-17T12:00:00.000Z	22 \| good	3.596 \| good	9.893 \| good	20.858 \| good	0.419 \| good	7.555 \| good	0.004 \| good
2025-09-17T13:00:00.000Z	22 \| good	3.638 \| good	9.895 \| good	21.147 \| good	0.353 \| good	7.068 \| good	0.004 \| good
2025-09-17T14:00:00.000Z	22 \| good	3.899 \| good	8.862 \| good	21.951 \| good	0.442 \| good	6.267 \| good	0.004 \| good
2025-09-17T15:00:00.000Z	22 \| good	3.581 \| good	10.309 \| good	22.133 \| good	0.444 \| good	6.4 \| good	0.004 \| good
2025-09-17T16:00:00.000Z	22 \| good	3.721 \| good	9.424 \| good	22.882 \| good	0.441 \| good	6.314 \| good	0.004 \| good
2025-09-17T17:00:00.000Z	21 \| good	3.393 \| good	8.489 \| good	23.364 \| good	0.673 \| good	6.267 \| good	0.004 \| good
2025-09-17T18:00:00.000Z	22 \| good	3.527 \| good	8.558 \| good	22.523 \| good	0.442 \| good	6.4 \| good	0.004 \| good
2025-09-17T19:00:00.000Z	22 \| good	3.902 \| good	9.356 \| good	22.817 \| good	0.442 \| good	6.4 \| good	0.004 \| good
2025-09-17T20:00:00.000Z	22 \| good	3.898 \| good	8.194 \| good	22.936 \| good	0.354 \| good	6.4 \| good	0.004 \| good
2025-09-17T21:00:00.000Z	22 \| good	4.34 \| good	8.032 \| good	21.976 \| good	0.36 \| good	6.18 \| good	0.004 \| good
2025-09-17T22:00:00.000Z	22 \| good	3.933 \| good	8.452 \| good	23.776 \| good	0.354 \| good	5.96 \| good	0.003 \| good
2025-09-17T23:00:00.000Z	27 \| good	4.638 \| good	9.001 \| good	22.953 \| good	0.353 \| good	5.827 \| good	0.003 \| good
2025-09-18T00:00:00.000Z	22 \| good	3.003 \| good	6.413 \| good	24.493 \| good	0.382 \| good	3.114 \| good	0.208 \| good
2025-09-18T01:00:00.000Z	23 \| good	3.003 \| good	6.268 \| good	24.695 \| good	0.382 \| good	2.657 \| good	0.154 \| good
2025-09-18T02:00:00.000Z	22 \| good	2.957 \| good	6.113 \| good	24.292 \| good	0.382 \| good	2.338 \| good	0.195 \| good
2025-09-18T03:00:00.000Z	22 \| good	2.957 \| good	6.113 \| good	23.943 \| good	0.382 \| good	2.338 \| good	0.193 \| good
2025-09-18T03:00:00.000Z	22 \| good	1.631 \| good	5.216 \| good	23.911 \| good	0.382 \| good	3.387 \| good	0.195 \| good
2025-09-17T05:00:00.000Z	24 \| good	4.352 \| good	6.198 \| good	26.367 \| good	0.209 \| good	4.067 \| good	0.122 \| good
2025-09-17T06:00:00.000Z	25 \| good	4.312 \| good	6.206 \| good	26.754 \| good	0.229 \| good	6.411 \| good	0.122 \| good
2025-09-17T07:00:00.000Z	27 \| good	4.188 \| good	7.039 \| good	28.685 \| good	0.245 \| good	8.174 \| good	0.126 \| good
2025-09-17T08:00:00.000Z	28 \| good	4.109 \| good	7.667 \| good	30.038 \| good	0.276 \| good	8.046 \| good	0.127 \| good
2025-09-17T09:00:00.000Z	30 \| good	4.341 \| good	8.4 \| good	31.839 \| good	0.331 \| good	6.704 \| good	0.125 \| good
2025-09-17T10:00:00.000Z	30 \| good	4.407 \| good	9.365 \| good	32.068 \| good	0.283 \| good	5.378 \| good	0.123 \| good
2025-09-17T11:00:00.000Z	31 \| good	4.663 \| good	9.81 \| good	32.521 \| good	0.267 \| good	4.85 \| good	0.123 \| good
2025-09-17T12:00:00.000Z	31 \| good	4.913 \| good	9.985 \| good	32.705 \| good	0.251 \| good	4.823 \| good	0.122 \| good
2025-09-17T13:00:00.000Z	30 \| good	5.03 \| good	9.738 \| good	32.288 \| good	0.248 \| good	4.864 \| good	0.121 \| good
2025-09-17T14:00:00.000Z	30 \| good	5.119 \| good	10.065 \| good	31.925 \| good	0.242 \| good	5.033 \| good	0.121 \| good
2025-09-17T15:00:00.000Z	30 \| good	5.25 \| good	9.739 \| good	31.66 \| good	0.243 \| good	5.367 \| good	0.12 \| good
2025-09-17T16:00:00.000Z	28 \| good	5.309 \| good	9.555 \| good	30.307 \| good	0.234 \| good	6.099 \| good	0.12 \| good
2025-09-17T17:00:00.000Z	27 \| good	5.26 \| good	9.09 \| good	29.065 \| good	0.245 \| good	6.816 \| good	0.12 \| good
2025-09-17T18:00:00.000Z	27 \| good	5.463 \| good	9.045 \| good	27.768 \| good	0.296 \| good	7.301 \| good	0.12 \| good
2025-09-17T19:00:00.000Z	27 \| good	5.246 \| good	9.107 \| good	27.442 \| good	0.299 \| good	6.56 \| good	0.116 \| good
2025-09-17T20:00:00.000Z	27 \| good	5.158 \| good	8.961 \| good	28.148 \| good	0.276 \| good	5.382 \| good	0.113 \| good
2025-09-17T21:00:00.000Z	27 \| good	5.122 \| good	8.758 \| good	27.915 \| good	0.252 \| good	4.64 \| good	0.112 \| good
2025-09-17T22:00:00.000Z	27 \| good	5.06 \| good	8.558 \| good	27.603 \| good	0.211 \| good	4.246 \| good	0.111 \| good
2025-09-17T23:00:00.000Z	27 \| good	5.138 \| good	8.621 \| good	28.105 \| good	0.178 \| good	3.813 \| good	0.109 \| good
2025-09-18T00:00:00.000Z	27 \| good	4.881 \| good	8.858 \| good	27.154 \| good	0.142 \| good	3.175 \| good	0.107 \| good
2025-09-18T01:00:00.000Z	27 \| good	4.703 \| good	9.309 \| good	26.255 \| good	0.123 \| good	2.708 \| good	0.106 \| good
2025-09-18T02:00:00.000Z	24 \| good	4.478 \| good	9.337 \| good	25.879 \| good	0.115 \| good	2.363 \| good	0.103 \| good
2025-09-18T03:00:00.000Z	24 \| good	4.268 \| good	8.776 \| good	25.919 \| good	0.114 \| good	2.2 \| good	0.101 \| good
2025-09-18T04:00:00.000Z	24 \| good	4.072 \| good	7.794 \| good	26.048 \| good	0.111 \| good	2.114 \| good	0.1 \| good
2025-09-18T05:00:00.000Z	24 \| good	3.782 \| good	6.92 \| good	26.107 \| good	0.132 \| good	2.274 \| good	0.102 \| good
2025-09-18T06:00:00.000Z	23 \| good	3.978 \| good	7.509 \| good	24.651 \| good	0.195 \| good	3.986 \| good	0.104 \| good
2025-09-18T07:00:00.000Z	22 \| good	4.302 \| good	8.118 \| good	23.974 \| good	0.242 \| good	6.227 \| good	0.109 \| good
2025-09-18T08:00:00.000Z	22 \| good	4.114 \| good	7.918 \| good	23.735 \| good	0.254 \| good	6.531 \| good	0.11 \| good
2025-09-18T09:00:00.000Z	25 \| good	3.833 \| good	7.769 \| good	26.995 \| good	0.236 \| good	5.842 \| good	0.111 \| good
2025-09-18T10:00:00.000Z	26 \| good	3.545 \| good	7.052 \| good	27.851 \| good	0.224 \| good	4.408 \| good	0.109 \| good
2025-09-18T11:00:00.000Z	27 \| good	3.443 \| good	6.716 \| good	29.112 \| good	0.206 \| good	3.624 \| good	0.107 \| good
2025-09-18T12:00:00.000Z	28 \| good	3.299 \| good	6.49 \| good	29.851 \| good	0.201 \| good	3.174 \| good	0.106 \| good
2025-09-18T13:00:00.000Z	29 \| good	3.224 \| good	6.273 \| good	30.589 \| good	0.203 \| good	3.165 \| good	0.105 \| good
2025-09-18T14:00:00.000Z	29 \| good	3.287 \| good	6.49 \| good	30.57 \| good	0.205 \| good	3.305 \| good	0.106 \| good
2025-09-18T15:00:00.000Z	28 \| good	3.463 \| good	6.721 \| good	30.004 \| good	0.208 \| good	3.781 \| good	0.107 \| good
2025-09-18T16:00:00.000Z	27 \| good	3.657 \| good	7.393 \| good	28.751 \| good	0.208 \| good	4.654 \| good	0.108 \| good
2025-09-18T17:00:00.000Z	25 \| good	3.745 \| good	7.812 \| good	27.474 \| good	0.221 \| good	5.862 \| good	0.11 \| good
2025-09-18T18:00:00.000Z	24 \| good	4.072 \| good	7.238 \| good	25.939 \| good	0.266 \| good	6.645 \| good	0.11 \| good
2025-09-18T19:00:00.000Z	24 \| good	3.555 \| good	7.173 \| good	26.398 \| good	0.299 \| good	6.993 \| good	0.109 \| good
2025-09-18T20:00:00.000Z	25 \| good	3.746 \| good	7.063 \| good	26.967 \| good	0.312 \| good	5.74 \| good	0.106 \| good
2025-09-18T21:00:00.000Z	25 \| good	3.759 \| good	6.678 \| good	26.647 \| good	0.302 \| good	4.955 \| good	0.105 \| good
2025-09-18T22:00:00.000Z	24 \| good	3.526 \| good	6.509 \| good	26.237 \| good	0.296 \| good	4.569 \| good	0.104 \| good
2025-09-18T23:00:00.000Z	24 \| good	3.411 \| good	6.379 \| good	26.323 \| good	0.241 \| good	4.254 \| good	0.105 \| good
2025-09-19T00:00:00.000Z	25 \| good	3.45 \| good	6.359 \| good	26.877 \| good	0.213 \| good	3.702 \| good	0.105 \| good
2025-09-19T01:00:00.000Z	24 \| good	3.47 \| good	6.278 \| good	25.926 \| good	0.192 \| good	3.036 \| good	0.103 \| good
2025-09-19T02:00:00.000Z	25 \| good	3.648 \| good	6.491 \| good	26.782 \| good	0.191 \| good	2.868 \| good	0.103 \| good
2025-09-19T03:00:00.000Z	24 \| good	3.911 \| good	6.807 \| good	26.202 \| good	0.187 \| good	2.868 \| good	0.103 \| good
2025-09-19T04:00:00.000Z	24 \| good	4.4 \| good	7.184 \| good	25.528 \| good	0.209 \| good	3.156 \| good	0.105 \| good

Waltham Cross

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Waltham Cross, Hertfordshire

0.36ppm

How accurate is Hertfordshire, UK air quality data?

The air quality data for Hertfordshire, UK is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for Waltham Cross, Hertfordshire get updated?

Air quality updates for Waltham Cross, Hertfordshire are available every hour.

What time in the past 24 hours saw the poorest air quality in Waltham Cross, Hertfordshire?

Waltham Cross, Hertfordshire experienced its worst air quality at 07:00:00, 2025-09-16.

When was air quality in Waltham Cross, Hertfordshire the best over the past 24 hours?

The best air quality in Waltham Cross, Hertfordshire was observed at 03:00:00 on 2025-09-17.

What is the air quality in Waltham Cross, Hertfordshire right now?

The air quality in Waltham Cross, Hertfordshire right now is Good, with an AQI of 22.

What pollutant is most frequently found in Waltham Cross, Hertfordshire?

In Waltham Cross, Hertfordshire, PM2.5 is the most frequently found pollutant.

What can I do if the air quality in Waltham Cross, Hertfordshire is poor?

When air quality in Waltham Cross, Hertfordshire is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Waltham Cross, Hertfordshire right now?

Waltham Cross, Hertfordshire currently has a PM_2.5 concentration of 4.108 μg/m³.

What is the current level of PM₁₀ in Waltham Cross, Hertfordshire?

Waltham Cross, Hertfordshire currently has a PM₁₀ concentration of 8.788 μg/m³.

What is the current level of carbon monoxide (CO) in Waltham Cross, Hertfordshire?

The current carbon monoxide (CO) level in Waltham Cross, Hertfordshire is 0.37 ppm.

What is the current level of sulfur dioxide (SO₂) in Waltham Cross, Hertfordshire?

The current sulfur dioxide (SO₂) concentration in Waltham Cross, Hertfordshire is 0.432 ppb.

What is the current level of ozone (O₃) in Waltham Cross, Hertfordshire?

Waltham Cross, Hertfordshire currently has an ozone (O₃) concentration of 18.664 ppm.

What is the current level of nitrogen dioxide (NO₂) in Waltham Cross, Hertfordshire?

The current level of nitrogen dioxide (NO₂) in Waltham Cross, Hertfordshire is 4.46 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-16T04:00:00.000Z	27 \| good	5.318 \| good	15.718 \| good	26.585 \| good	0.409 \| good	2.382 \| good	0.364 \| good
2025-09-16T05:00:00.000Z	33 \| good	6.474 \| good	12.576 \| good	26.131 \| good	0.341 \| good	2.056 \| good	0.321 \| good
2025-09-16T06:00:00.000Z	33 \| good	6.244 \| good	15.814 \| good	21.622 \| good	0.342 \| good	2.276 \| good	0.005 \| good
2025-09-16T07:00:00.000Z	33 \| good	5.972 \| good	12.371 \| good	21.334 \| good	0.348 \| good	2.763 \| good	0.005 \| good
2025-09-16T08:00:00.000Z	38 \| good	6.716 \| good	11.964 \| good	22.783 \| good	0.347 \| good	3.289 \| good	0.005 \| good
2025-09-16T09:00:00.000Z	33 \| good	5.553 \| good	13.302 \| good	24.712 \| good	0.443 \| good	3.376 \| good	0.005 \| good
2025-09-16T10:00:00.000Z	27 \| good	5.367 \| good	16.645 \| good	25.229 \| good	0.394 \| good	2.755 \| good	0.005 \| good
2025-09-16T11:00:00.000Z	27 \| good	5.305 \| good	11.935 \| good	22.333 \| good	0.392 \| good	2.921 \| good	0.004 \| good
2025-09-16T12:00:00.000Z	33 \| good	5.804 \| good	12.8 \| good	24.686 \| good	0.378 \| good	2.575 \| good	0.004 \| good
2025-09-16T13:00:00.000Z	33 \| good	5.623 \| good	16.254 \| good	23.38 \| good	0.428 \| good	2.661 \| good	0.004 \| good
2025-09-16T14:00:00.000Z	24 \| good	4.5 \| good	14.515 \| good	25.573 \| good	0.377 \| good	2.488 \| good	0.004 \| good
2025-09-16T15:00:00.000Z	27 \| good	4.826 \| good	13.086 \| good	26.605 \| good	0.391 \| good	2.142 \| good	0.004 \| good
2025-09-16T16:00:00.000Z	27 \| good	5.162 \| good	12.599 \| good	25.768 \| good	0.481 \| good	2.402 \| good	0.004 \| good
2025-09-16T17:00:00.000Z	28 \| good	4.967 \| good	11.618 \| good	29.821 \| good	0.484 \| good	2.189 \| good	0.004 \| good
2025-09-16T18:00:00.000Z	28 \| good	4.783 \| good	13.292 \| good	29.568 \| good	0.365 \| good	2.543 \| good	0.004 \| good
2025-09-16T19:00:00.000Z	27 \| good	5.113 \| good	12.193 \| good	27.389 \| good	0.426 \| good	2.543 \| good	0.005 \| good
2025-09-16T20:00:00.000Z	27 \| good	5.154 \| good	11.049 \| good	26.857 \| good	0.349 \| good	2.763 \| good	0.005 \| good
2025-09-16T21:00:00.000Z	27 \| good	4.689 \| good	11.328 \| good	26.367 \| good	0.349 \| good	3.289 \| good	0.005 \| good
2025-09-16T22:00:00.000Z	27 \| good	4.882 \| good	11.224 \| good	28.153 \| good	0.346 \| good	3.509 \| good	0.004 \| good
2025-09-16T23:00:00.000Z	27 \| good	5.349 \| good	11.583 \| good	26.387 \| good	0.39 \| good	3.242 \| good	0.004 \| good
2025-09-17T00:00:00.000Z	27 \| good	5.084 \| good	11.967 \| good	25.496 \| good	0.405 \| good	8.277 \| good	0.29 \| good
2025-09-17T01:00:00.000Z	22 \| good	4.368 \| good	9.957 \| good	24.107 \| good	0.405 \| good	8.39 \| good	0.339 \| good
2025-09-17T02:00:00.000Z	22 \| good	4.223 \| good	11.573 \| good	22.411 \| good	0.405 \| good	7.038 \| good	0.312 \| good
2025-09-17T03:00:00.000Z	22 \| good	4.388 \| good	11.745 \| good	22.313 \| good	0.406 \| good	7.038 \| good	0.361 \| good
2025-09-17T04:00:00.000Z	22 \| good	4.015 \| good	10.617 \| good	19.419 \| good	0.415 \| good	6.788 \| good	0.37 \| good
2025-09-17T05:00:00.000Z	27 \| good	4.535 \| good	11.921 \| good	21.314 \| good	0.339 \| good	6.714 \| good	0.445 \| good
2025-09-17T06:00:00.000Z	27 \| good	4.898 \| good	9.51 \| good	19.849 \| good	0.34 \| good	6.534 \| good	0.004 \| good
2025-09-17T07:00:00.000Z	27 \| good	4.848 \| good	11.213 \| good	20.402 \| good	0.34 \| good	7.335 \| good	0.004 \| good
2025-09-17T08:00:00.000Z	27 \| good	4.548 \| good	9.795 \| good	20.139 \| good	0.34 \| good	7.948 \| good	0.004 \| good
2025-09-17T09:00:00.000Z	22 \| good	3.758 \| good	12.367 \| good	19.534 \| good	0.34 \| good	7.681 \| good	0.004 \| good
2025-09-17T10:00:00.000Z	22 \| good	3.605 \| good	10.608 \| good	22.087 \| good	0.349 \| good	7.194 \| good	0.004 \| good
2025-09-17T11:00:00.000Z	22 \| good	3.836 \| good	9.736 \| good	20.196 \| good	0.348 \| good	7.469 \| good	0.004 \| good
2025-09-17T12:00:00.000Z	22 \| good	3.596 \| good	9.893 \| good	20.858 \| good	0.419 \| good	7.555 \| good	0.004 \| good
2025-09-17T13:00:00.000Z	22 \| good	3.638 \| good	9.895 \| good	21.147 \| good	0.353 \| good	7.068 \| good	0.004 \| good
2025-09-17T14:00:00.000Z	22 \| good	3.899 \| good	8.862 \| good	21.951 \| good	0.442 \| good	6.267 \| good	0.004 \| good
2025-09-17T15:00:00.000Z	22 \| good	3.581 \| good	10.309 \| good	22.133 \| good	0.444 \| good	6.4 \| good	0.004 \| good
2025-09-17T16:00:00.000Z	22 \| good	3.721 \| good	9.424 \| good	22.882 \| good	0.441 \| good	6.314 \| good	0.004 \| good
2025-09-17T17:00:00.000Z	21 \| good	3.393 \| good	8.489 \| good	23.364 \| good	0.673 \| good	6.267 \| good	0.004 \| good
2025-09-17T18:00:00.000Z	22 \| good	3.527 \| good	8.558 \| good	22.523 \| good	0.442 \| good	6.4 \| good	0.004 \| good
2025-09-17T19:00:00.000Z	22 \| good	3.902 \| good	9.356 \| good	22.817 \| good	0.442 \| good	6.4 \| good	0.004 \| good
2025-09-17T20:00:00.000Z	22 \| good	3.898 \| good	8.194 \| good	22.936 \| good	0.354 \| good	6.4 \| good	0.004 \| good
2025-09-17T21:00:00.000Z	22 \| good	4.34 \| good	8.032 \| good	21.976 \| good	0.36 \| good	6.18 \| good	0.004 \| good
2025-09-17T22:00:00.000Z	22 \| good	3.933 \| good	8.452 \| good	23.776 \| good	0.354 \| good	5.96 \| good	0.003 \| good
2025-09-17T23:00:00.000Z	27 \| good	4.638 \| good	9.001 \| good	22.953 \| good	0.353 \| good	5.827 \| good	0.003 \| good
2025-09-18T00:00:00.000Z	22 \| good	3.003 \| good	6.413 \| good	24.493 \| good	0.382 \| good	3.114 \| good	0.208 \| good
2025-09-18T01:00:00.000Z	23 \| good	3.003 \| good	6.268 \| good	24.695 \| good	0.382 \| good	2.657 \| good	0.154 \| good
2025-09-18T02:00:00.000Z	22 \| good	2.957 \| good	6.113 \| good	24.292 \| good	0.382 \| good	2.338 \| good	0.195 \| good
2025-09-18T03:00:00.000Z	22 \| good	2.957 \| good	6.113 \| good	23.943 \| good	0.382 \| good	2.338 \| good	0.193 \| good
2025-09-18T03:00:00.000Z	22 \| good	1.631 \| good	5.216 \| good	23.911 \| good	0.382 \| good	3.387 \| good	0.195 \| good
2025-09-17T05:00:00.000Z	24 \| good	4.352 \| good	6.198 \| good	26.367 \| good	0.209 \| good	4.067 \| good	0.122 \| good
2025-09-17T06:00:00.000Z	25 \| good	4.312 \| good	6.206 \| good	26.754 \| good	0.229 \| good	6.411 \| good	0.122 \| good
2025-09-17T07:00:00.000Z	27 \| good	4.188 \| good	7.039 \| good	28.685 \| good	0.245 \| good	8.174 \| good	0.126 \| good
2025-09-17T08:00:00.000Z	28 \| good	4.109 \| good	7.667 \| good	30.038 \| good	0.276 \| good	8.046 \| good	0.127 \| good
2025-09-17T09:00:00.000Z	30 \| good	4.341 \| good	8.4 \| good	31.839 \| good	0.331 \| good	6.704 \| good	0.125 \| good
2025-09-17T10:00:00.000Z	30 \| good	4.407 \| good	9.365 \| good	32.068 \| good	0.283 \| good	5.378 \| good	0.123 \| good
2025-09-17T11:00:00.000Z	31 \| good	4.663 \| good	9.81 \| good	32.521 \| good	0.267 \| good	4.85 \| good	0.123 \| good
2025-09-17T12:00:00.000Z	31 \| good	4.913 \| good	9.985 \| good	32.705 \| good	0.251 \| good	4.823 \| good	0.122 \| good
2025-09-17T13:00:00.000Z	30 \| good	5.03 \| good	9.738 \| good	32.288 \| good	0.248 \| good	4.864 \| good	0.121 \| good
2025-09-17T14:00:00.000Z	30 \| good	5.119 \| good	10.065 \| good	31.925 \| good	0.242 \| good	5.033 \| good	0.121 \| good
2025-09-17T15:00:00.000Z	30 \| good	5.25 \| good	9.739 \| good	31.66 \| good	0.243 \| good	5.367 \| good	0.12 \| good
2025-09-17T16:00:00.000Z	28 \| good	5.309 \| good	9.555 \| good	30.307 \| good	0.234 \| good	6.099 \| good	0.12 \| good
2025-09-17T17:00:00.000Z	27 \| good	5.26 \| good	9.09 \| good	29.065 \| good	0.245 \| good	6.816 \| good	0.12 \| good
2025-09-17T18:00:00.000Z	27 \| good	5.463 \| good	9.045 \| good	27.768 \| good	0.296 \| good	7.301 \| good	0.12 \| good
2025-09-17T19:00:00.000Z	27 \| good	5.246 \| good	9.107 \| good	27.442 \| good	0.299 \| good	6.56 \| good	0.116 \| good
2025-09-17T20:00:00.000Z	27 \| good	5.158 \| good	8.961 \| good	28.148 \| good	0.276 \| good	5.382 \| good	0.113 \| good
2025-09-17T21:00:00.000Z	27 \| good	5.122 \| good	8.758 \| good	27.915 \| good	0.252 \| good	4.64 \| good	0.112 \| good
2025-09-17T22:00:00.000Z	27 \| good	5.06 \| good	8.558 \| good	27.603 \| good	0.211 \| good	4.246 \| good	0.111 \| good
2025-09-17T23:00:00.000Z	27 \| good	5.138 \| good	8.621 \| good	28.105 \| good	0.178 \| good	3.813 \| good	0.109 \| good
2025-09-18T00:00:00.000Z	27 \| good	4.881 \| good	8.858 \| good	27.154 \| good	0.142 \| good	3.175 \| good	0.107 \| good
2025-09-18T01:00:00.000Z	27 \| good	4.703 \| good	9.309 \| good	26.255 \| good	0.123 \| good	2.708 \| good	0.106 \| good
2025-09-18T02:00:00.000Z	24 \| good	4.478 \| good	9.337 \| good	25.879 \| good	0.115 \| good	2.363 \| good	0.103 \| good
2025-09-18T03:00:00.000Z	24 \| good	4.268 \| good	8.776 \| good	25.919 \| good	0.114 \| good	2.2 \| good	0.101 \| good
2025-09-18T04:00:00.000Z	24 \| good	4.072 \| good	7.794 \| good	26.048 \| good	0.111 \| good	2.114 \| good	0.1 \| good
2025-09-18T05:00:00.000Z	24 \| good	3.782 \| good	6.92 \| good	26.107 \| good	0.132 \| good	2.274 \| good	0.102 \| good
2025-09-18T06:00:00.000Z	23 \| good	3.978 \| good	7.509 \| good	24.651 \| good	0.195 \| good	3.986 \| good	0.104 \| good
2025-09-18T07:00:00.000Z	22 \| good	4.302 \| good	8.118 \| good	23.974 \| good	0.242 \| good	6.227 \| good	0.109 \| good
2025-09-18T08:00:00.000Z	22 \| good	4.114 \| good	7.918 \| good	23.735 \| good	0.254 \| good	6.531 \| good	0.11 \| good
2025-09-18T09:00:00.000Z	25 \| good	3.833 \| good	7.769 \| good	26.995 \| good	0.236 \| good	5.842 \| good	0.111 \| good
2025-09-18T10:00:00.000Z	26 \| good	3.545 \| good	7.052 \| good	27.851 \| good	0.224 \| good	4.408 \| good	0.109 \| good
2025-09-18T11:00:00.000Z	27 \| good	3.443 \| good	6.716 \| good	29.112 \| good	0.206 \| good	3.624 \| good	0.107 \| good
2025-09-18T12:00:00.000Z	28 \| good	3.299 \| good	6.49 \| good	29.851 \| good	0.201 \| good	3.174 \| good	0.106 \| good
2025-09-18T13:00:00.000Z	29 \| good	3.224 \| good	6.273 \| good	30.589 \| good	0.203 \| good	3.165 \| good	0.105 \| good
2025-09-18T14:00:00.000Z	29 \| good	3.287 \| good	6.49 \| good	30.57 \| good	0.205 \| good	3.305 \| good	0.106 \| good
2025-09-18T15:00:00.000Z	28 \| good	3.463 \| good	6.721 \| good	30.004 \| good	0.208 \| good	3.781 \| good	0.107 \| good
2025-09-18T16:00:00.000Z	27 \| good	3.657 \| good	7.393 \| good	28.751 \| good	0.208 \| good	4.654 \| good	0.108 \| good
2025-09-18T17:00:00.000Z	25 \| good	3.745 \| good	7.812 \| good	27.474 \| good	0.221 \| good	5.862 \| good	0.11 \| good
2025-09-18T18:00:00.000Z	24 \| good	4.072 \| good	7.238 \| good	25.939 \| good	0.266 \| good	6.645 \| good	0.11 \| good
2025-09-18T19:00:00.000Z	24 \| good	3.555 \| good	7.173 \| good	26.398 \| good	0.299 \| good	6.993 \| good	0.109 \| good
2025-09-18T20:00:00.000Z	25 \| good	3.746 \| good	7.063 \| good	26.967 \| good	0.312 \| good	5.74 \| good	0.106 \| good
2025-09-18T21:00:00.000Z	25 \| good	3.759 \| good	6.678 \| good	26.647 \| good	0.302 \| good	4.955 \| good	0.105 \| good
2025-09-18T22:00:00.000Z	24 \| good	3.526 \| good	6.509 \| good	26.237 \| good	0.296 \| good	4.569 \| good	0.104 \| good
2025-09-18T23:00:00.000Z	24 \| good	3.411 \| good	6.379 \| good	26.323 \| good	0.241 \| good	4.254 \| good	0.105 \| good
2025-09-19T00:00:00.000Z	25 \| good	3.45 \| good	6.359 \| good	26.877 \| good	0.213 \| good	3.702 \| good	0.105 \| good
2025-09-19T01:00:00.000Z	24 \| good	3.47 \| good	6.278 \| good	25.926 \| good	0.192 \| good	3.036 \| good	0.103 \| good
2025-09-19T02:00:00.000Z	25 \| good	3.648 \| good	6.491 \| good	26.782 \| good	0.191 \| good	2.868 \| good	0.103 \| good
2025-09-19T03:00:00.000Z	24 \| good	3.911 \| good	6.807 \| good	26.202 \| good	0.187 \| good	2.868 \| good	0.103 \| good
2025-09-19T04:00:00.000Z	24 \| good	4.4 \| good	7.184 \| good	25.528 \| good	0.209 \| good	3.156 \| good	0.105 \| good

Current air quality index in Waltham Cross, Hertfordshire today

Common air pollutants in Waltham Cross, Hertfordshire

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Waltham Cross, Hertfordshire air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Waltham Cross, Hertfordshire

Air quality in nearby cities

Cheshunt, Hertfordshire

Waltham Abbey, Essex

Loughton, Essex

Buckhurst Hill, Essex

Hoddesdon, Hertfordshire

Epping, Essex

How accurate is Hertfordshire, UK air quality data?

Air quality levels in UK

Frequently asked questions

How frequently does the air quality data for Waltham Cross, Hertfordshire get updated?

What time in the past 24 hours saw the poorest air quality in Waltham Cross, Hertfordshire?

When was air quality in Waltham Cross, Hertfordshire the best over the past 24 hours?

What is the air quality in Waltham Cross, Hertfordshire right now?

What pollutant is most frequently found in Waltham Cross, Hertfordshire?

What can I do if the air quality in Waltham Cross, Hertfordshire is poor?

What is the PM2.5 concentration in Waltham Cross, Hertfordshire right now?

What is the current level of PM10 in Waltham Cross, Hertfordshire?

What is the current level of carbon monoxide (CO) in Waltham Cross, Hertfordshire?

What is the current level of sulfur dioxide (SO2) in Waltham Cross, Hertfordshire?

What is the current level of ozone (O3) in Waltham Cross, Hertfordshire?

What is the current level of nitrogen dioxide (NO2) in Waltham Cross, Hertfordshire?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Waltham Cross, Hertfordshire right now?

What is the current level of PM₁₀ in Waltham Cross, Hertfordshire?

What is the current level of sulfur dioxide (SO₂) in Waltham Cross, Hertfordshire?

What is the current level of ozone (O₃) in Waltham Cross, Hertfordshire?

What is the current level of nitrogen dioxide (NO₂) in Waltham Cross, Hertfordshire?