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

The PM10 concentration in Norwalk, Connecticut is 1.998 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 0.498 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 22.468 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 2.708 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 0.781 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)

0.78 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

2.00 μg/m³

155

255

425

605+

Ozone (O₃)

22.47 ppb

201

201+

Sulfur Dioxide (SO₂)

0.50 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.71 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.28 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
2026-09-27T00:00:00.000Z	29 \| good	3.005 \| good	11.65 \| good	31.319 \| good	0.149 \| good	1.941 \| good	0.2 \| good
2026-09-27T01:00:00.000Z	27 \| good	3.228 \| good	13.661 \| good	28.72 \| good	0.179 \| good	1.667 \| good	0.2 \| good
2026-09-27T02:00:00.000Z	28 \| good	2.954 \| good	12.247 \| good	29.904 \| good	0.161 \| good	1.344 \| good	0.2 \| good
2026-09-27T03:00:00.000Z	26 \| good	0.9 \| good	3.095 \| good	28.319 \| good	0.117 \| good	1.513 \| good	0.131 \| good
2026-09-27T04:00:00.000Z	27 \| good	2.958 \| good	6.711 \| good	29.265 \| good	0.243 \| good	1.948 \| good	0.2 \| good
2026-09-27T05:00:00.000Z	29 \| good	3.268 \| good	13.945 \| good	31.461 \| good	0.396 \| good	1.852 \| good	0.2 \| good
2026-09-27T06:00:00.000Z	27 \| good	2.559 \| good	13.312 \| good	29.168 \| good	0.405 \| good	1.187 \| good	0.2 \| good
2026-09-27T07:00:00.000Z	27 \| good	2.711 \| good	7.949 \| good	29.247 \| good	0.424 \| good	2.547 \| good	0.216 \| good
2026-09-27T08:00:00.000Z	26 \| good	2.02 \| good	5.575 \| good	27.593 \| good	0.26 \| good	1.061 \| good	0.2 \| good
2026-09-27T09:00:00.000Z	27 \| good	1.94 \| good	11.679 \| good	28.71 \| good	0.262 \| good	1.028 \| good	0.179 \| good
2026-09-27T10:00:00.000Z	28 \| good	1.27 \| good	7.847 \| good	29.992 \| good	0.243 \| good	1.088 \| good	0.179 \| good
2026-09-27T11:00:00.000Z	28 \| good	1.237 \| good	3.763 \| good	30.159 \| good	0.243 \| good	1.017 \| good	0.179 \| good
2026-09-27T12:00:00.000Z	27 \| good	0.869 \| good	4.369 \| good	28.705 \| good	0.299 \| good	1.279 \| good	0.179 \| good
2026-09-27T13:00:00.000Z	27 \| good	0.721 \| good	3.27 \| good	28.848 \| good	0.26 \| good	1.287 \| good	0.179 \| good
2026-09-27T14:00:00.000Z	27 \| good	0.942 \| good	5.585 \| good	29.154 \| good	0.243 \| good	1.427 \| good	0.194 \| good
2026-09-27T15:00:00.000Z	28 \| good	1.264 \| good	1.952 \| good	30.022 \| good	0.259 \| good	1.669 \| good	0.194 \| good
2026-09-27T16:00:00.000Z	25 \| good	1.361 \| good	6.541 \| good	26.962 \| good	0.428 \| good	1.672 \| good	0.194 \| good
2026-09-27T17:00:00.000Z	25 \| good	1.643 \| good	6.852 \| good	26.888 \| good	0.445 \| good	1.801 \| good	0.194 \| good
2026-09-27T18:00:00.000Z	24 \| good	1.055 \| good	3.858 \| good	26.174 \| good	0.494 \| good	3.23 \| good	0.218 \| good
2026-09-27T19:00:00.000Z	24 \| good	2.107 \| good	6.791 \| good	25.855 \| good	0.191 \| good	2.066 \| good	0.236 \| good
2026-09-27T20:00:00.000Z	23 \| good	1.571 \| good	8.041 \| good	24.882 \| good	0.262 \| good	2.219 \| good	0.236 \| good
2026-09-27T21:00:00.000Z	24 \| good	0.868 \| good	4.332 \| good	26.102 \| good	0.243 \| good	2.599 \| good	0.269 \| good
2026-09-27T22:00:00.000Z	23 \| good	0.684 \| good	6.818 \| good	24.814 \| good	0.262 \| good	2.981 \| good	0.254 \| good
2026-09-27T23:00:00.000Z	21 \| good	0.978 \| good	3.991 \| good	23.451 \| good	0.41 \| good	4.283 \| good	0.254 \| good
2026-09-28T00:00:00.000Z	21 \| good	1.001 \| good	2.696 \| good	22.625 \| good	0.464 \| good	2.64 \| good	0.211 \| good
2026-09-28T01:00:00.000Z	23 \| good	0.948 \| good	2.719 \| good	25.485 \| good	0.243 \| good	2.363 \| good	0.211 \| good
2026-09-28T02:00:00.000Z	20 \| good	0.786 \| good	5.633 \| good	21.948 \| good	0.243 \| good	2.209 \| good	0.211 \| good
2026-09-28T03:00:00.000Z	31 \| good	3.756 \| good	16.127 \| good	34.439 \| good	0.216 \| good	4.244 \| good	0.147 \| good
2026-09-28T04:00:00.000Z	22 \| good	1.313 \| good	5.175 \| good	24.119 \| good	0.207 \| good	2.431 \| good	0.179 \| good
2026-09-28T05:00:00.000Z	20 \| good	1.075 \| good	4.83 \| good	22.422 \| good	0.451 \| good	2.328 \| good	0.179 \| good
2026-09-28T06:00:00.000Z	24 \| good	1.218 \| good	4.156 \| good	25.732 \| good	0.244 \| good	1.924 \| good	0.179 \| good
2026-09-28T07:00:00.000Z	24 \| good	0.716 \| good	5.979 \| good	25.728 \| good	0.263 \| good	1.633 \| good	0.177 \| good
2026-09-28T08:00:00.000Z	23 \| good	0.804 \| good	5.472 \| good	24.901 \| good	0.429 \| good	2.128 \| good	0.179 \| good
2026-09-28T09:00:00.000Z	24 \| good	0.706 \| good	3.775 \| good	26.088 \| good	0.523 \| good	2.341 \| good	0.179 \| good
2026-09-28T10:00:00.000Z	24 \| good	0.853 \| good	4.856 \| good	26.493 \| good	0.39 \| good	2.807 \| good	0.178 \| good
2026-09-28T11:00:00.000Z	24 \| good	0.883 \| good	2.809 \| good	25.825 \| good	0.224 \| good	3.141 \| good	0.201 \| good
2026-09-28T12:00:00.000Z	25 \| good	0.673 \| good	4.385 \| good	27.027 \| good	0.41 \| good	3.61 \| good	0.211 \| good
2026-09-28T13:00:00.000Z	25 \| good	1.206 \| good	3.627 \| good	26.678 \| good	0.432 \| good	3.925 \| good	0.249 \| good
2026-09-28T14:00:00.000Z	24 \| good	1.032 \| good	5.405 \| good	26.055 \| good	0.273 \| good	3.963 \| good	0.211 \| good
2026-09-28T15:00:00.000Z	21 \| good	1.002 \| good	3.224 \| good	22.565 \| good	0.232 \| good	4.231 \| good	0.211 \| good
2026-09-28T16:00:00.000Z	22 \| good	1.055 \| good	5.704 \| good	24.149 \| good	0.502 \| good	3.626 \| good	0.233 \| good
2026-09-28T17:00:00.000Z	21 \| good	0.829 \| good	3.461 \| good	23.444 \| good	0.706 \| good	3.479 \| good	0.233 \| good
2026-09-28T18:00:00.000Z	21 \| good	0.801 \| good	4.801 \| good	22.861 \| good	0.45 \| good	3.104 \| good	0.236 \| good
2026-09-28T19:00:00.000Z	21 \| good	0.764 \| good	2.423 \| good	23.133 \| good	0.467 \| good	3.049 \| good	0.207 \| good
2026-09-28T20:00:00.000Z	22 \| good	0.803 \| good	2.341 \| good	23.516 \| good	0.67 \| good	2.755 \| good	0.243 \| good
2026-09-28T21:00:00.000Z	20 \| good	0.733 \| good	2.752 \| good	22.181 \| good	0.447 \| good	2.55 \| good	0.229 \| good
2026-09-28T22:00:00.000Z	19 \| good	0.783 \| good	1.946 \| good	20.558 \| good	0.505 \| good	2.778 \| good	0.261 \| good
2026-09-28T23:00:00.000Z	20 \| good	0.781 \| good	1.998 \| good	22.468 \| good	0.498 \| good	2.708 \| good	0.278 \| good
2026-09-29T00:00:00.000Z	21 \| good	2.156 \| good	9.021 \| good	23.252 \| good	0.196 \| good	5.874 \| good	0.167 \| good
2026-09-29T01:00:00.000Z	21 \| good	2.378 \| good	9.994 \| good	22.929 \| good	0.207 \| good	6.563 \| good	0.169 \| good
2026-09-29T02:00:00.000Z	19 \| good	2.394 \| good	10.064 \| good	21.248 \| good	0.22 \| good	7.286 \| good	0.172 \| good
2026-09-29T03:00:00.000Z	17 \| good	2.83 \| good	12.047 \| good	18.331 \| good	0.236 \| good	7.954 \| good	0.178 \| good
2026-09-29T04:00:00.000Z	16 \| good	3.141 \| good	13.979 \| good	17.498 \| good	0.243 \| good	8.266 \| good	0.184 \| good
2026-09-29T05:00:00.000Z	16 \| good	3.303 \| good	14.116 \| good	13.889 \| good	0.245 \| good	8.42 \| good	0.188 \| good
2026-09-29T06:00:00.000Z	16 \| good	3.199 \| good	14.051 \| good	11.04 \| good	0.252 \| good	8.593 \| good	0.19 \| good
2026-09-29T07:00:00.000Z	16 \| good	3.01 \| good	12.254 \| good	10.188 \| good	0.259 \| good	8.692 \| good	0.19 \| good
2026-09-29T08:00:00.000Z	16 \| good	2.94 \| good	12.138 \| good	9.801 \| good	0.265 \| good	8.757 \| good	0.189 \| good
2026-09-29T09:00:00.000Z	11 \| good	2.446 \| good	10.034 \| good	8.798 \| good	0.272 \| good	8.885 \| good	0.187 \| good
2026-09-29T10:00:00.000Z	11 \| good	2.444 \| good	10.058 \| good	6.902 \| good	0.281 \| good	9.106 \| good	0.189 \| good
2026-09-29T11:00:00.000Z	16 \| good	2.864 \| good	11.997 \| good	8.699 \| good	0.303 \| good	9.568 \| good	0.197 \| good
2026-09-29T12:00:00.000Z	16 \| good	2.687 \| good	11.05 \| good	15.588 \| good	0.331 \| good	9.337 \| good	0.216 \| good
2026-09-29T13:00:00.000Z	20 \| good	2.638 \| good	11.037 \| good	21.887 \| good	0.327 \| good	6.574 \| good	0.201 \| good
2026-09-29T14:00:00.000Z	25 \| good	2.555 \| good	10.182 \| good	27.14 \| good	0.329 \| good	4.351 \| good	0.181 \| good
2026-09-29T15:00:00.000Z	29 \| good	2.471 \| good	10.07 \| good	30.601 \| good	0.317 \| good	3.176 \| good	0.166 \| good
2026-09-29T16:00:00.000Z	31 \| good	2.18 \| good	9.007 \| good	33.064 \| good	0.316 \| good	2.863 \| good	0.161 \| good
2026-09-29T17:00:00.000Z	31 \| good	1.734 \| good	7.063 \| good	32.7 \| good	0.325 \| good	2.753 \| good	0.159 \| good
2026-09-29T18:00:00.000Z	27 \| good	1.852 \| good	7.968 \| good	28.536 \| good	0.329 \| good	2.368 \| good	0.157 \| good
2026-09-29T19:00:00.000Z	27 \| good	1.871 \| good	7.968 \| good	29.238 \| good	0.322 \| good	2.258 \| good	0.156 \| good
2026-09-29T20:00:00.000Z	28 \| good	1.937 \| good	8.037 \| good	29.91 \| good	0.328 \| good	2.412 \| good	0.157 \| good
2026-09-29T21:00:00.000Z	25 \| good	2.04 \| good	8.116 \| good	27.094 \| good	0.332 \| good	2.868 \| good	0.161 \| good
2026-09-29T22:00:00.000Z	22 \| good	2.717 \| good	11.109 \| good	23.956 \| good	0.35 \| good	5.847 \| good	0.186 \| good
2026-09-29T23:00:00.000Z	19 \| good	2.87 \| good	12.116 \| good	19.998 \| good	0.394 \| good	9.521 \| good	0.219 \| good
2026-09-30T00:00:00.000Z	27 \| good	5.109 \| good	22.156 \| good	22.701 \| good	0.44 \| good	11.434 \| good	0.239 \| good
2026-09-30T01:00:00.000Z	33 \| good	5.57 \| good	24.219 \| good	21.534 \| good	0.466 \| good	12.442 \| good	0.246 \| good
2026-09-30T02:00:00.000Z	33 \| good	5.857 \| good	25.264 \| good	19.954 \| good	0.471 \| good	12.387 \| good	0.243 \| good
2026-09-30T03:00:00.000Z	27 \| good	5.315 \| good	23.09 \| good	19.873 \| good	0.461 \| good	11.473 \| good	0.233 \| good
2026-09-30T04:00:00.000Z	27 \| good	4.905 \| good	21.113 \| good	20.713 \| good	0.436 \| good	10.231 \| good	0.221 \| good
2026-09-30T05:00:00.000Z	22 \| good	4.289 \| good	18.981 \| good	21.169 \| good	0.418 \| good	9.222 \| good	0.21 \| good
2026-09-30T06:00:00.000Z	22 \| good	4.074 \| good	17.991 \| good	20.705 \| good	0.416 \| good	8.893 \| good	0.204 \| good
2026-09-30T07:00:00.000Z	22 \| good	4.013 \| good	17.958 \| good	17.902 \| good	0.419 \| good	8.94 \| good	0.202 \| good
2026-09-30T08:00:00.000Z	22 \| good	4.186 \| good	18.126 \| good	16.859 \| good	0.424 \| good	8.904 \| good	0.201 \| good
2026-09-30T09:00:00.000Z	22 \| good	4.155 \| good	18.073 \| good	11.875 \| good	0.432 \| good	8.666 \| good	0.198 \| good
2026-09-30T10:00:00.000Z	22 \| good	4.309 \| good	19.07 \| good	12.583 \| good	0.444 \| good	8.733 \| good	0.198 \| good
2026-09-30T11:00:00.000Z	27 \| good	4.548 \| good	19.998 \| good	12.489 \| good	0.473 \| good	9.08 \| good	0.209 \| good
2026-09-30T12:00:00.000Z	27 \| good	4.84 \| good	21.05 \| good	16.992 \| good	0.487 \| good	7.871 \| good	0.232 \| good
2026-09-30T13:00:00.000Z	27 \| good	4.537 \| good	20.011 \| good	23.559 \| good	0.528 \| good	5.554 \| good	0.214 \| good
2026-09-30T14:00:00.000Z	27 \| good	4.154 \| good	18.079 \| good	29.2 \| good	0.602 \| good	3.825 \| good	0.192 \| good
2026-09-30T15:00:00.000Z	30 \| good	4.067 \| good	17.991 \| good	32.495 \| good	0.616 \| good	2.554 \| good	0.175 \| good
2026-09-30T16:00:00.000Z	32 \| good	4.081 \| good	17.994 \| good	35.408 \| good	0.529 \| good	2.019 \| good	0.163 \| good
2026-09-30T17:00:00.000Z	36 \| good	4.19 \| good	18.036 \| good	38.625 \| good	0.462 \| good	2.084 \| good	0.159 \| good
2026-09-30T18:00:00.000Z	37 \| good	4.432 \| good	19.076 \| good	40.143 \| good	0.417 \| good	2.325 \| good	0.158 \| good
2026-09-30T19:00:00.000Z	39 \| good	4.647 \| good	20.039 \| good	41.607 \| good	0.391 \| good	2.77 \| good	0.157 \| good
2026-09-30T20:00:00.000Z	40 \| good	4.06 \| good	17.941 \| good	43.284 \| good	0.37 \| good	3.311 \| good	0.159 \| good
2026-09-30T21:00:00.000Z	38 \| good	4.912 \| good	21.039 \| good	41.429 \| good	0.368 \| good	4.862 \| good	0.171 \| good
2026-09-30T22:00:00.000Z	36 \| good	6.012 \| good	26.864 \| good	38.645 \| good	0.426 \| good	12.084 \| good	0.233 \| good
2026-09-30T23:00:00.000Z	44 \| good	8.26 \| good	36.067 \| good	36.34 \| good	0.544 \| good	19.377 \| good	0.315 \| good

Norwalk

Get reliable air quality data to drive your business

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

0.28ppm

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 03:00:00 on 2026-09-28.

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 10:00:00 on 2026-09-28.

What is the AQI in Norwalk, Connecticut right now?

As of now, the AQI in Norwalk, Connecticut is 20, indicating Good conditions.

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

Norwalk, Connecticut air has the highest levels of O3.

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 0.781 μg/m³.

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

The PM₁₀ concentration in Norwalk, Connecticut is 1.998 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 0.278 ppm.

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

Currently, Norwalk, Connecticut has a sulfur dioxide (SO₂) concentration of 0.498 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 22.468 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 2.708 ppb.

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