What is the PM10 level in Norwalk, Connecticut at the moment?

The PM10 concentration in Norwalk, Connecticut is 9.648 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Norwalk, Connecticut at the moment?

Currently, Norwalk, Connecticut has a sulfur dioxide (SO2) concentration of 0.442 ppb.

What is the ozone (O3) level in Norwalk, Connecticut at the moment?

The current ozone (O3) level in Norwalk, Connecticut at the moment is 26.195 ppm.

What is the nitrogen dioxide (NO2) level in Norwalk, Connecticut at the moment?

Nitrogen dioxide (NO2) level in Norwalk, Connecticut at the moment is 11.867 ppb.

Live air quality index in Norwalk, Connecticut today

Q: What is the PM2.5 level in Norwalk, Connecticut at the moment?

PM2.5 levels in Norwalk, Connecticut are currently 5.234 μg/m3.

Stay updated with real-time air quality in Norwalk, Connecticut 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

Norwalk, Connecticut

Last updated: ... (Local time)

Major air pollutants in Norwalk, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

5.53 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

15.88 μg/m³

155

255

425

605+

Ozone (O₃)

30.32 ppb

201

201+

Sulfur Dioxide (SO₂)

0.28 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.97 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.26 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Norwalk, Connecticut

Scroll To Air Quality Map

Track live Norwalk, Connecticut air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-11-01T20:00:00.000Z	34 \| good	1.892 \| good	8.308 \| good	37.042 \| good	0.278 \| good	0.778 \| good	0.1 \| good
2025-11-01T21:00:00.000Z	34 \| good	2.131 \| good	8.266 \| good	36.614 \| good	0.157 \| good	1.186 \| good	0.1 \| good
2025-11-01T22:00:00.000Z	30 \| good	2.093 \| good	6.429 \| good	31.824 \| good	0.148 \| good	1.99 \| good	0.1 \| good
2025-11-01T23:00:00.000Z	30 \| good	2.744 \| good	11.702 \| good	31.901 \| good	0.159 \| good	2.588 \| good	0.139 \| good
2025-11-02T00:00:00.000Z	27 \| good	3.359 \| good	9.224 \| good	28.824 \| good	0.316 \| good	3.016 \| good	0.237 \| good
2025-11-02T01:00:00.000Z	28 \| good	3.05 \| good	7.299 \| good	29.696 \| good	0.32 \| good	4.147 \| good	0.196 \| good
2025-11-02T02:00:00.000Z	27 \| good	3.666 \| good	8.455 \| good	28.983 \| good	0.316 \| good	9.098 \| good	0.224 \| good
2025-11-02T03:00:00.000Z	25 \| good	2.611 \| good	10.982 \| good	26.66 \| good	0.88 \| good	11.328 \| good	0.194 \| good
2025-11-02T04:00:00.000Z	27 \| good	5.234 \| good	9.648 \| good	26.195 \| good	0.442 \| good	11.867 \| good	0.252 \| good
2025-11-02T05:00:00.000Z	33 \| good	5.713 \| good	15.864 \| good	24.149 \| good	0.177 \| good	13.118 \| good	0.251 \| good
2025-11-02T06:00:00.000Z	33 \| good	5.689 \| good	19.916 \| good	25.259 \| good	0.144 \| good	13.008 \| good	0.251 \| good
2025-11-02T07:00:00.000Z	33 \| good	5.886 \| good	20.466 \| good	25.196 \| good	0.214 \| good	16.59 \| good	0.2 \| good
2025-11-02T08:00:00.000Z	27 \| good	4.953 \| good	18.742 \| good	21.296 \| good	0.243 \| good	14.26 \| good	0.191 \| good
2025-11-02T09:00:00.000Z	22 \| good	4.134 \| good	13.687 \| good	16.28 \| good	0.273 \| good	13.303 \| good	0.22 \| good
2025-11-02T10:00:00.000Z	27 \| good	4.515 \| good	14.919 \| good	17.299 \| good	0.263 \| good	12.962 \| good	0.22 \| good
2025-11-02T11:00:00.000Z	22 \| good	3.972 \| good	14.917 \| good	18.695 \| good	0.298 \| good	12.443 \| good	0.261 \| good
2025-11-02T12:00:00.000Z	19 \| good	3.226 \| good	10.778 \| good	21.438 \| good	0.276 \| good	11.421 \| good	0.287 \| good
2025-11-02T13:00:00.000Z	22 \| good	4.328 \| good	12.112 \| good	22.337 \| good	0.279 \| good	11.082 \| good	0.333 \| good
2025-11-02T14:00:00.000Z	27 \| good	4.697 \| good	15.899 \| good	16.968 \| good	0.583 \| good	5.753 \| good	0.248 \| good
2025-11-02T15:00:00.000Z	22 \| good	3.812 \| good	7.664 \| good	16.239 \| good	0.186 \| good	4.147 \| good	0.159 \| good
2025-11-02T16:00:00.000Z	22 \| good	4.111 \| good	12.909 \| good	18.695 \| good	0.29 \| good	2.939 \| good	0.138 \| good
2025-11-02T17:00:00.000Z	22 \| good	3.612 \| good	12.267 \| good	21.912 \| good	0.193 \| good	3.144 \| good	0.156 \| good
2025-11-02T18:00:00.000Z	23 \| good	3.328 \| good	10.213 \| good	24.526 \| good	0.195 \| good	3.469 \| good	0.176 \| good
2025-11-02T19:00:00.000Z	28 \| good	2.95 \| good	8.4 \| good	30.267 \| good	0.32 \| good	3.584 \| good	0.176 \| good
2025-11-02T20:00:00.000Z	31 \| good	3.295 \| good	8.05 \| good	33.567 \| good	0.298 \| good	3.265 \| good	0.196 \| good
2025-11-02T21:00:00.000Z	34 \| good	3.507 \| good	9.704 \| good	36.962 \| good	0.249 \| good	4.129 \| good	0.22 \| good
2025-11-02T22:00:00.000Z	34 \| good	4.024 \| good	9.975 \| good	36.98 \| good	0.211 \| good	5.223 \| good	0.22 \| good
2025-11-02T23:00:00.000Z	33 \| good	6.301 \| good	15.116 \| good	32.352 \| good	0.196 \| good	7.983 \| good	0.238 \| good
2025-11-03T00:00:00.000Z	44 \| good	8.101 \| good	20.07 \| good	25.801 \| good	0.189 \| good	10.177 \| good	0.405 \| good
2025-11-03T01:00:00.000Z	54 \| moderate	11.258 \| good	25.307 \| good	27.802 \| good	0.236 \| good	13.892 \| good	0.418 \| good
2025-11-03T02:00:00.000Z	56 \| moderate	11.575 \| good	26.606 \| good	26.6 \| good	0.413 \| good	23.342 \| good	0.373 \| good
2025-11-03T03:00:00.000Z	58 \| moderate	13.395 \| fine	31.268 \| good	11.331 \| good	0.343 \| good	20.862 \| good	0.32 \| good
2025-11-03T04:00:00.000Z	54 \| moderate	11.219 \| good	29.033 \| good	9.31 \| good	0.188 \| good	17.11 \| good	0.323 \| good
2025-11-03T05:00:00.000Z	54 \| moderate	10.628 \| good	32.073 \| good	12.013 \| good	0.186 \| good	16.453 \| good	0.337 \| good
2025-11-03T06:00:00.000Z	54 \| moderate	10.522 \| good	26.425 \| good	9.893 \| good	0.315 \| good	15.594 \| good	0.325 \| good
2025-11-03T07:00:00.000Z	52 \| moderate	9.631 \| good	35.859 \| good	5.936 \| good	0.29 \| good	15.625 \| good	0.379 \| good
2025-11-03T08:00:00.000Z	52 \| moderate	10.046 \| good	36.54 \| good	6.642 \| good	0.403 \| good	13.454 \| good	0.317 \| good
2025-11-03T09:00:00.000Z	49 \| good	9.091 \| good	27.865 \| good	6.572 \| good	0.392 \| good	12.873 \| good	0.297 \| good
2025-11-03T10:00:00.000Z	52 \| moderate	10.471 \| good	21.552 \| good	13.496 \| good	0.291 \| good	13.803 \| good	0.305 \| good
2025-11-03T11:00:00.000Z	54 \| moderate	10.874 \| good	24.541 \| good	11.98 \| good	0.619 \| good	14.736 \| good	0.323 \| good
2025-11-03T12:00:00.000Z	54 \| moderate	10.892 \| good	21.72 \| good	18.202 \| good	0.913 \| good	13.045 \| good	0.406 \| good
2025-11-03T13:00:00.000Z	52 \| moderate	9.988 \| good	26.796 \| good	10.213 \| good	1.013 \| good	12.753 \| good	0.515 \| good
2025-11-03T14:00:00.000Z	56 \| moderate	12.027 \| good	30.729 \| good	9.872 \| good	1.093 \| good	15.113 \| good	0.666 \| good
2025-11-03T15:00:00.000Z	60 \| moderate	13.696 \| fine	32.103 \| good	12.609 \| good	0.688 \| good	16.969 \| good	0.606 \| good
2025-11-03T16:00:00.000Z	52 \| moderate	10.148 \| good	22.643 \| good	13.633 \| good	0.589 \| good	11.014 \| good	0.437 \| good
2025-11-03T17:00:00.000Z	38 \| good	7.317 \| good	17.522 \| good	24.68 \| good	0.484 \| good	9.21 \| good	0.342 \| good
2025-11-03T18:00:00.000Z	33 \| good	5.672 \| good	15.869 \| good	29.077 \| good	0.408 \| good	6.85 \| good	0.277 \| good
2025-11-03T19:00:00.000Z	33 \| good	5.532 \| good	15.879 \| good	30.324 \| good	0.285 \| good	3.972 \| good	0.26 \| good
2025-11-03T19:00:00.000Z	33 \| good	5.532 \| good	15.879 \| good	30.324 \| good	0.285 \| good	3.972 \| good	0.26 \| good
2025-11-02T06:00:00.000Z	21 \| good	2.472 \| good	10.032 \| good	23.476 \| good	0.775 \| good	6.859 \| good	0.162 \| good
2025-11-02T07:00:00.000Z	21 \| good	2.545 \| good	10.112 \| good	23.064 \| good	0.805 \| good	6.487 \| good	0.159 \| good
2025-11-02T08:00:00.000Z	20 \| good	2.556 \| good	10.156 \| good	21.558 \| good	0.834 \| good	6.114 \| good	0.155 \| good
2025-11-02T09:00:00.000Z	16 \| good	2.147 \| good	9.013 \| good	17.426 \| good	0.863 \| good	5.741 \| good	0.152 \| good
2025-11-02T10:00:00.000Z	17 \| good	1.673 \| good	7.045 \| good	18.278 \| good	0.99 \| good	8.002 \| good	0.178 \| good
2025-11-02T11:00:00.000Z	17 \| good	1.092 \| good	4.229 \| good	18.339 \| good	1.117 \| good	10.263 \| good	0.204 \| good
2025-11-02T12:00:00.000Z	18 \| good	1.874 \| good	8.084 \| good	19.328 \| good	1.244 \| good	12.523 \| good	0.23 \| good
2025-11-02T13:00:00.000Z	26 \| good	2.424 \| good	10.093 \| good	27.887 \| good	1.18 \| good	9.753 \| good	0.206 \| good
2025-11-02T14:00:00.000Z	30 \| good	2.728 \| good	11.044 \| good	31.538 \| good	1.115 \| good	6.982 \| good	0.183 \| good
2025-11-02T15:00:00.000Z	31 \| good	2.851 \| good	11.96 \| good	33.888 \| good	1.051 \| good	4.212 \| good	0.159 \| good
2025-11-02T16:00:00.000Z	32 \| good	3.223 \| good	14.003 \| good	35.42 \| good	0.947 \| good	3.816 \| good	0.155 \| good
2025-11-02T17:00:00.000Z	34 \| good	3.339 \| good	14.865 \| good	37.354 \| good	0.843 \| good	3.421 \| good	0.15 \| good
2025-11-02T18:00:00.000Z	35 \| good	3.342 \| good	14.977 \| good	38.097 \| good	0.739 \| good	3.026 \| good	0.145 \| good
2025-11-02T19:00:00.000Z	37 \| good	3.198 \| good	13.955 \| good	39.575 \| good	0.841 \| good	4.299 \| good	0.153 \| good
2025-11-02T20:00:00.000Z	39 \| good	3.763 \| good	16.071 \| good	42.262 \| good	0.942 \| good	5.571 \| good	0.16 \| good
2025-11-02T21:00:00.000Z	38 \| good	4.534 \| good	19.979 \| good	41.011 \| good	1.044 \| good	6.844 \| good	0.167 \| good
2025-11-02T22:00:00.000Z	32 \| good	4.079 \| good	18.036 \| good	35.072 \| good	1.492 \| good	12.905 \| good	0.209 \| good
2025-11-02T23:00:00.000Z	26 \| good	4.331 \| good	19.066 \| good	28.173 \| good	1.94 \| good	18.966 \| good	0.25 \| good
2025-11-03T00:00:00.000Z	24 \| good	3.549 \| good	16.048 \| good	23.61 \| good	2.388 \| good	25.027 \| good	0.292 \| good
2025-11-03T01:00:00.000Z	27 \| good	4.593 \| good	20.199 \| good	22.981 \| good	2.71 \| good	25.638 \| good	0.288 \| good
2025-11-03T02:00:00.000Z	44 \| good	7.729 \| good	34.172 \| good	24.814 \| good	3.032 \| good	26.248 \| good	0.284 \| good
2025-11-03T03:00:00.000Z	58 \| moderate	12.726 \| fine	56.833 \| fine	14.698 \| good	3.354 \| good	26.858 \| good	0.28 \| good
2025-11-03T04:00:00.000Z	62 \| moderate	15.484 \| fine	68.844 \| fine	3.253 \| good	3.309 \| good	26.138 \| good	0.271 \| good
2025-11-03T05:00:00.000Z	67 \| moderate	17.835 \| fine	78.77 \| fine	2.377 \| good	3.264 \| good	25.417 \| good	0.262 \| good
2025-11-03T06:00:00.000Z	71 \| moderate	19.917 \| fine	86.878 \| fine	1.365 \| good	3.219 \| good	24.697 \| good	0.252 \| good
2025-11-03T07:00:00.000Z	73 \| moderate	20.959 \| fine	92.711 \| fine	1.858 \| good	3.127 \| good	23.013 \| good	0.241 \| good
2025-11-03T08:00:00.000Z	73 \| moderate	20.506 \| fine	90.961 \| fine	2.827 \| good	3.035 \| good	21.329 \| good	0.23 \| good
2025-11-03T09:00:00.000Z	73 \| moderate	20.729 \| fine	91.277 \| fine	2.088 \| good	2.943 \| good	19.645 \| good	0.218 \| good
2025-11-03T10:00:00.000Z	75 \| moderate	21.537 \| fine	95.063 \| fine	1.275 \| good	2.94 \| good	20.244 \| good	0.235 \| good
2025-11-03T11:00:00.000Z	75 \| moderate	21.945 \| fine	97.052 \| fine	1.499 \| good	2.937 \| good	20.844 \| good	0.252 \| good
2025-11-03T12:00:00.000Z	75 \| moderate	21.878 \| fine	95.411 \| fine	3.739 \| good	2.933 \| good	21.443 \| good	0.268 \| good
2025-11-03T13:00:00.000Z	69 \| moderate	19.199 \| fine	85.332 \| fine	22.952 \| good	2.927 \| good	18.084 \| good	0.247 \| good
2025-11-03T14:00:00.000Z	64 \| moderate	16.273 \| fine	72.981 \| fine	28.106 \| good	2.92 \| good	14.725 \| good	0.226 \| good
2025-11-03T15:00:00.000Z	58 \| moderate	13.029 \| fine	58.872 \| fine	31.481 \| good	2.914 \| good	11.365 \| good	0.205 \| good
2025-11-03T16:00:00.000Z	52 \| moderate	10.486 \| good	46.124 \| good	33.589 \| good	2.599 \| good	9.275 \| good	0.188 \| good
2025-11-03T17:00:00.000Z	44 \| good	8.372 \| good	36.95 \| good	40.649 \| good	2.285 \| good	7.184 \| good	0.172 \| good
2025-11-03T18:00:00.000Z	44 \| good	7.446 \| good	32.952 \| good	48.054 \| good	1.971 \| good	5.094 \| good	0.155 \| good
2025-11-03T19:00:00.000Z	46 \| good	6.523 \| good	29.072 \| good	50.461 \| good	1.914 \| good	6.109 \| good	0.159 \| good
2025-11-03T20:00:00.000Z	48 \| good	5.888 \| good	25.199 \| good	51.553 \| good	1.857 \| good	7.125 \| good	0.163 \| good
2025-11-03T21:00:00.000Z	44 \| good	4.383 \| good	19.104 \| good	47.745 \| good	1.8 \| good	8.14 \| good	0.167 \| good
2025-11-03T22:00:00.000Z	37 \| good	3.362 \| good	15.111 \| good	40.171 \| good	1.883 \| good	10.961 \| good	0.18 \| good
2025-11-03T23:00:00.000Z	27 \| good	4.735 \| good	20.267 \| good	27.969 \| good	1.965 \| good	13.781 \| good	0.193 \| good
2025-11-04T00:00:00.000Z	54 \| moderate	10.856 \| good	12.217 \| good	23.878 \| good	2.073 \| good	16.857 \| good	0.207 \| good
2025-11-04T01:00:00.000Z	44 \| good	7.99 \| good	35.339 \| good	16.68 \| good	2.129 \| good	15.778 \| good	0.199 \| good
2025-11-04T02:00:00.000Z	52 \| moderate	9.73 \| good	43.177 \| good	15.983 \| good	2.209 \| good	14.954 \| good	0.191 \| good
2025-11-04T03:00:00.000Z	54 \| moderate	11.082 \| good	49.271 \| good	6.323 \| good	2.289 \| good	14.131 \| good	0.184 \| good
2025-11-04T04:00:00.000Z	54 \| moderate	11.009 \| good	48.944 \| good	8.505 \| good	2.528 \| good	11.657 \| good	0.18 \| good
2025-11-04T05:00:00.000Z	49 \| good	8.711 \| good	37.994 \| good	15.82 \| good	2.767 \| good	9.184 \| good	0.176 \| good

Norwalk

Get reliable air quality data to drive your business

Norwalk, Connecticut air quality map: Stay updated on AQI near you

0.25ppm

How accurate is Connecticut, USA air quality data?

Air quality and pollutant data for Connecticut, USA 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 Norwalk, Connecticut?

The air quality information for Norwalk, Connecticut is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Norwalk, Connecticut at its worst?

In the past 24 hours, the air quality in Norwalk, Connecticut was at its worst at 09:00:00 on 2025-11-01.

When did Norwalk, Connecticut experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Norwalk, Connecticut was observed at 03:00:00 on 2025-11-02.

What is the AQI in Norwalk, Connecticut right now?

As of now, the AQI in Norwalk, Connecticut is 27, indicating Good conditions.

What is the most common type of pollution in Norwalk, Connecticut?

Norwalk, Connecticut air has the highest levels of PM2.5.

What should I do in case of poor air quality in Norwalk, Connecticut?

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

What is the PM_2.5 level in Norwalk, Connecticut at the moment?

PM_2.5 levels in Norwalk, Connecticut are currently 5.234 μg/m³.

What is the PM₁₀ level in Norwalk, Connecticut at the moment?

The PM₁₀ concentration in Norwalk, Connecticut is 9.648 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Norwalk, Connecticut at the moment?

The current carbon monoxide (CO) concentration in Norwalk, Connecticut is 0.252 ppm.

What is the sulfur dioxide (SO₂) level in Norwalk, Connecticut at the moment?

Currently, Norwalk, Connecticut has a sulfur dioxide (SO₂) concentration of 0.442 ppb.

What is the ozone (O₃) level in Norwalk, Connecticut at the moment?

The current ozone (O₃) level in Norwalk, Connecticut at the moment is 26.195 ppm.

What is the nitrogen dioxide (NO₂) level in Norwalk, Connecticut at the moment?

Nitrogen dioxide (NO₂) level in Norwalk, Connecticut at the moment is 11.867 ppb.

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