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

The PM10 concentration in Norwalk, Connecticut is 39.544 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 1.143 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 79.383 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 5.297 ppb.

Live air quality index in Norwalk, Connecticut today

Name: Live air pollution levels in Norwalk, Connecticut today
Creator: Ambee

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)

Moderate

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)

12.35 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

50.57 μg/m³

155

255

425

605+

Ozone (O₃)

20.02 ppb

201

201+

Sulfur Dioxide (SO₂)

0.75 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

19.41 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.32 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
2025-07-28T12:00:00.000Z	54 \| moderate	11.165 \| good	43.717 \| good	18.728 \| good	0.442 \| good	11.376 \| good	0.339 \| good
2025-07-28T13:00:00.000Z	54 \| moderate	10.652 \| good	28.013 \| good	24.332 \| good	0.435 \| good	5.907 \| good	0.364 \| good
2025-07-28T14:00:00.000Z	52 \| moderate	10.429 \| good	47.427 \| good	22.548 \| good	0.287 \| good	3.924 \| good	0.354 \| good
2025-07-28T15:00:00.000Z	54 \| moderate	10.693 \| good	43.016 \| good	28.04 \| good	0.32 \| good	3.998 \| good	0.277 \| good
2025-07-28T16:00:00.000Z	51 \| moderate	9.362 \| good	54.577 \| good	31.318 \| good	0.418 \| good	3.223 \| good	0.222 \| good
2025-07-28T17:00:00.000Z	49 \| good	8.922 \| good	42.349 \| good	33.319 \| good	0.43 \| good	4.152 \| good	0.222 \| good
2025-07-28T18:00:00.000Z	44 \| good	8.337 \| good	38.303 \| good	37.868 \| good	0.539 \| good	12.714 \| good	0.247 \| good
2025-07-28T19:00:00.000Z	49 \| good	8.9 \| good	43.332 \| good	34.703 \| good	0.332 \| good	7.211 \| good	0.222 \| good
2025-07-28T20:00:00.000Z	54 \| moderate	11.235 \| good	41.93 \| good	33.46 \| good	0.387 \| good	8.43 \| good	0.251 \| good
2025-07-28T21:00:00.000Z	44 \| good	7.991 \| good	41.93 \| good	33.013 \| good	0.463 \| good	3.061 \| good	0.257 \| good
2025-07-28T22:00:00.000Z	44 \| good	8.451 \| good	45.006 \| good	37.972 \| good	0.324 \| good	1.877 \| good	0.257 \| good
2025-07-28T23:00:00.000Z	45 \| good	8.159 \| good	36.705 \| good	48.545 \| good	0.38 \| good	4.474 \| good	0.265 \| good
2025-07-29T00:00:00.000Z	52 \| moderate	10.488 \| good	40.616 \| good	42.97 \| good	0.437 \| good	7.185 \| good	0.322 \| good
2025-07-29T01:00:00.000Z	54 \| moderate	11.408 \| good	40.572 \| good	39.158 \| good	0.367 \| good	3.998 \| good	0.309 \| good
2025-07-29T02:00:00.000Z	56 \| moderate	12.304 \| fine	27.014 \| good	31.692 \| good	0.547 \| good	11.563 \| good	0.356 \| good
2025-07-29T03:00:00.000Z	62 \| moderate	14.789 \| fine	25.486 \| good	25.788 \| good	0.59 \| good	12.596 \| good	0.363 \| good
2025-07-29T04:00:00.000Z	60 \| moderate	13.631 \| fine	38.447 \| good	22.843 \| good	0.566 \| good	10.068 \| good	0.385 \| good
2025-07-29T05:00:00.000Z	56 \| moderate	12.063 \| good	33.536 \| good	20.914 \| good	1.006 \| good	14.405 \| good	0.454 \| good
2025-07-29T06:00:00.000Z	64 \| moderate	16.389 \| fine	66.843 \| fine	21.012 \| good	0.953 \| good	13.417 \| good	0.353 \| good
2025-07-29T07:00:00.000Z	64 \| moderate	15.56 \| fine	52.115 \| good	13.84 \| good	0.874 \| good	13.392 \| good	0.442 \| good
2025-07-29T08:00:00.000Z	64 \| moderate	15.553 \| fine	64.698 \| fine	24.306 \| good	0.849 \| good	15.21 \| good	0.442 \| good
2025-07-29T09:00:00.000Z	62 \| moderate	14.689 \| fine	68.353 \| fine	18.369 \| good	0.842 \| good	8.044 \| good	0.383 \| good
2025-07-29T10:00:00.000Z	60 \| moderate	13.702 \| fine	61.576 \| fine	10.735 \| good	0.808 \| good	11.935 \| good	0.467 \| good
2025-07-29T11:00:00.000Z	62 \| moderate	15.094 \| fine	35.83 \| good	17.599 \| good	0.851 \| good	14.562 \| good	0.522 \| good
2025-07-29T12:00:00.000Z	60 \| moderate	13.831 \| fine	22.016 \| good	21.786 \| good	0.885 \| good	14.162 \| good	0.487 \| good
2025-07-29T13:00:00.000Z	62 \| moderate	14.501 \| fine	24.376 \| good	14.932 \| good	0.96 \| good	12.22 \| good	0.579 \| good
2025-07-29T14:00:00.000Z	66 \| moderate	16.93 \| fine	79.809 \| fine	16.791 \| good	0.783 \| good	15.719 \| good	0.46 \| good
2025-07-29T15:00:00.000Z	64 \| moderate	16.459 \| fine	51.239 \| good	30.965 \| good	1.061 \| good	18.262 \| good	0.426 \| good
2025-07-29T16:00:00.000Z	56 \| moderate	11.87 \| good	30.654 \| good	35.576 \| good	0.912 \| good	18.873 \| good	0.336 \| good
2025-07-29T17:00:00.000Z	54 \| moderate	10.682 \| good	50.302 \| good	38.516 \| good	0.861 \| good	15.171 \| good	0.296 \| good
2025-07-29T18:00:00.000Z	62 \| moderate	15.004 \| fine	68.823 \| fine	40.99 \| good	0.813 \| good	9.623 \| good	0.365 \| good
2025-07-29T19:00:00.000Z	58 \| moderate	13.26 \| fine	54.843 \| good	45.288 \| good	0.671 \| good	8.873 \| good	0.325 \| good
2025-07-29T20:00:00.000Z	49 \| good	9.315 \| good	37.335 \| good	42.9 \| good	0.981 \| good	15.965 \| good	0.333 \| good
2025-07-29T21:00:00.000Z	52 \| moderate	10.245 \| good	38.69 \| good	44.116 \| good	1.072 \| good	13.286 \| good	0.317 \| good
2025-07-29T22:00:00.000Z	60 \| moderate	13.76 \| fine	33.045 \| good	46.59 \| good	1.138 \| good	2.523 \| good	0.317 \| good
2025-07-29T23:00:00.000Z	52 \| moderate	10.426 \| good	31.275 \| good	43.561 \| good	1.21 \| good	2.722 \| good	0.356 \| good
2025-07-30T00:00:00.000Z	52 \| moderate	9.738 \| good	34.885 \| good	45.724 \| good	1.132 \| good	4.629 \| good	0.356 \| good
2025-07-30T01:00:00.000Z	52 \| moderate	9.892 \| good	34.512 \| good	51.739 \| good	1.122 \| good	5.504 \| good	0.272 \| good
2025-07-30T02:00:00.000Z	58 \| moderate	11.322 \| good	42.834 \| good	56.744 \| fine	1.339 \| good	8.535 \| good	0.313 \| good
2025-07-30T03:00:00.000Z	64 \| moderate	15.539 \| fine	69.232 \| fine	19.88 \| good	1.331 \| good	13.518 \| good	0.296 \| good
2025-07-30T04:00:00.000Z	56 \| moderate	12.18 \| fine	52.341 \| good	33.401 \| good	1.464 \| good	13.538 \| good	0.274 \| good
2025-07-30T05:00:00.000Z	66 \| moderate	17.375 \| fine	80.922 \| fine	38.263 \| good	1.526 \| good	11.458 \| good	0.299 \| good
2025-07-30T06:00:00.000Z	62 \| moderate	15.348 \| fine	68.27 \| fine	36.739 \| good	1.337 \| good	18.157 \| good	0.306 \| good
2025-07-30T07:00:00.000Z	62 \| moderate	15.443 \| fine	52.674 \| good	27.244 \| good	1.014 \| good	16.33 \| good	0.266 \| good
2025-07-30T08:00:00.000Z	66 \| moderate	16.751 \| fine	57.232 \| fine	25.215 \| good	0.947 \| good	14.445 \| good	0.266 \| good
2025-07-30T09:00:00.000Z	62 \| moderate	15.013 \| fine	61.594 \| fine	27.116 \| good	0.665 \| good	20.165 \| good	0.266 \| good
2025-07-30T10:00:00.000Z	56 \| moderate	12.138 \| fine	33.476 \| good	20.371 \| good	0.607 \| good	19.924 \| good	0.32 \| good
2025-07-30T11:00:00.000Z	56 \| moderate	12.35 \| fine	50.573 \| good	20.025 \| good	0.752 \| good	19.411 \| good	0.315 \| good
2025-07-29T22:00:00.000Z	66 \| moderate	17.122 \| fine	76.899 \| fine	43.993 \| good	0.707 \| good	3.359 \| good	0.201 \| good
2025-07-29T23:00:00.000Z	73 \| moderate	20.941 \| fine	92.544 \| fine	45.076 \| good	0.709 \| good	4.73 \| good	0.21 \| good
2025-07-30T00:00:00.000Z	73 \| moderate	21.289 \| fine	92.819 \| fine	52.146 \| good	0.711 \| good	6.102 \| good	0.218 \| good
2025-07-30T01:00:00.000Z	75 \| moderate	21.564 \| fine	94.749 \| fine	49.872 \| good	0.872 \| good	8.95 \| good	0.245 \| good
2025-07-30T02:00:00.000Z	75 \| moderate	21.716 \| fine	94.814 \| fine	36.471 \| good	1.033 \| good	11.799 \| good	0.271 \| good
2025-07-30T03:00:00.000Z	69 \| moderate	19.273 \| fine	84.952 \| fine	22.214 \| good	1.193 \| good	14.647 \| good	0.297 \| good
2025-07-30T04:00:00.000Z	64 \| moderate	15.811 \| fine	70.964 \| fine	19.945 \| good	1.173 \| good	13.922 \| good	0.292 \| good
2025-07-30T05:00:00.000Z	60 \| moderate	14.448 \| fine	65.075 \| fine	19.343 \| good	1.153 \| good	13.196 \| good	0.286 \| good
2025-07-30T06:00:00.000Z	60 \| moderate	13.942 \| fine	63.011 \| fine	21.32 \| good	1.132 \| good	12.471 \| good	0.281 \| good
2025-07-30T07:00:00.000Z	60 \| moderate	13.939 \| fine	62.992 \| fine	21.391 \| good	1.098 \| good	11.486 \| good	0.265 \| good
2025-07-30T08:00:00.000Z	62 \| moderate	14.889 \| fine	66.931 \| fine	20.065 \| good	1.065 \| good	10.501 \| good	0.249 \| good
2025-07-30T09:00:00.000Z	62 \| moderate	15.445 \| fine	68.985 \| fine	22.813 \| good	1.031 \| good	9.517 \| good	0.233 \| good
2025-07-30T10:00:00.000Z	64 \| moderate	16.119 \| fine	71.247 \| fine	17.533 \| good	1.016 \| good	8.891 \| good	0.232 \| good
2025-07-30T11:00:00.000Z	66 \| moderate	17.48 \| fine	77.22 \| fine	22.819 \| good	1.001 \| good	8.265 \| good	0.231 \| good
2025-07-30T12:00:00.000Z	69 \| moderate	18.587 \| fine	81.288 \| fine	32.262 \| good	0.987 \| good	7.639 \| good	0.23 \| good
2025-07-30T13:00:00.000Z	71 \| moderate	20.218 \| fine	89.077 \| fine	41.863 \| good	0.953 \| good	6.788 \| good	0.221 \| good
2025-07-30T14:00:00.000Z	73 \| moderate	21.441 \| fine	94.861 \| fine	51.171 \| good	0.919 \| good	5.938 \| good	0.213 \| good
2025-07-30T15:00:00.000Z	79 \| moderate	23.986 \| fine	104.935 \| fine	62.67 \| fine	0.886 \| good	5.087 \| good	0.204 \| good
2025-07-30T16:00:00.000Z	87 \| moderate	22.52 \| fine	98.832 \| fine	65.85 \| fine	0.951 \| good	4.073 \| good	0.199 \| good
2025-07-30T17:00:00.000Z	77 \| moderate	21.418 \| fine	94.865 \| fine	62.604 \| fine	1.017 \| good	3.059 \| good	0.193 \| good
2025-07-30T18:00:00.000Z	100 \| moderate	22.089 \| fine	96.974 \| fine	69.568 \| fine	1.083 \| good	2.044 \| good	0.188 \| good
2025-07-30T19:00:00.000Z	105 \| sensitive	24.197 \| fine	105.041 \| fine	72.142 \| moderate	1.006 \| good	2.003 \| good	0.183 \| good
2025-07-30T20:00:00.000Z	100 \| moderate	23.702 \| fine	102.854 \| fine	69.567 \| fine	0.929 \| good	1.961 \| good	0.179 \| good
2025-07-30T21:00:00.000Z	112 \| sensitive	22.836 \| fine	100.564 \| fine	74.196 \| moderate	0.851 \| good	1.919 \| good	0.174 \| good
2025-07-30T22:00:00.000Z	90 \| moderate	21.745 \| fine	94.968 \| fine	67.037 \| fine	0.846 \| good	3.077 \| good	0.184 \| good
2025-07-30T23:00:00.000Z	73 \| moderate	20.741 \| fine	90.955 \| fine	58.409 \| fine	0.841 \| good	4.236 \| good	0.195 \| good
2025-07-31T00:00:00.000Z	71 \| moderate	20.17 \| fine	88.914 \| fine	57.299 \| fine	0.837 \| good	5.394 \| good	0.205 \| good
2025-07-31T01:00:00.000Z	71 \| moderate	19.564 \| fine	86.826 \| fine	49.384 \| good	0.961 \| good	8.251 \| good	0.231 \| good
2025-07-31T02:00:00.000Z	71 \| moderate	19.859 \| fine	87.05 \| fine	38.9 \| good	1.086 \| good	11.108 \| good	0.258 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	16.333 \| fine	72.939 \| fine	37.089 \| good	1.211 \| good	13.965 \| good	0.285 \| good
2025-07-31T04:00:00.000Z	54 \| moderate	11.386 \| good	50.419 \| good	38.175 \| good	1.289 \| good	14.203 \| good	0.295 \| good
2025-07-31T05:00:00.000Z	60 \| moderate	13.633 \| fine	61.221 \| fine	28.632 \| good	1.366 \| good	14.442 \| good	0.306 \| good
2025-07-31T06:00:00.000Z	58 \| moderate	12.972 \| fine	58.917 \| fine	31.015 \| good	1.444 \| good	14.68 \| good	0.317 \| good
2025-07-31T07:00:00.000Z	58 \| moderate	13.312 \| fine	60.801 \| fine	31.673 \| good	1.401 \| good	12.829 \| good	0.296 \| good
2025-07-31T08:00:00.000Z	60 \| moderate	13.832 \| fine	62.801 \| fine	27.689 \| good	1.358 \| good	10.977 \| good	0.275 \| good
2025-07-31T09:00:00.000Z	60 \| moderate	14.228 \| fine	63.057 \| fine	21.047 \| good	1.314 \| good	9.126 \| good	0.254 \| good
2025-07-31T10:00:00.000Z	58 \| moderate	13.129 \| fine	59.026 \| fine	17.462 \| good	1.361 \| good	8.095 \| good	0.236 \| good
2025-07-31T11:00:00.000Z	60 \| moderate	14.43 \| fine	64.86 \| fine	21.931 \| good	1.407 \| good	7.064 \| good	0.219 \| good
2025-07-31T12:00:00.000Z	69 \| moderate	19.251 \| fine	84.884 \| fine	30.877 \| good	1.453 \| good	6.032 \| good	0.201 \| good
2025-07-31T13:00:00.000Z	71 \| moderate	20.313 \| fine	89.005 \| fine	41.824 \| good	1.564 \| good	5.739 \| good	0.201 \| good
2025-07-31T14:00:00.000Z	73 \| moderate	20.525 \| fine	90.817 \| fine	47.989 \| good	1.675 \| good	5.447 \| good	0.201 \| good
2025-07-31T15:00:00.000Z	73 \| moderate	20.925 \| fine	92.77 \| fine	46.344 \| good	1.786 \| good	5.154 \| good	0.201 \| good
2025-07-31T16:00:00.000Z	73 \| moderate	21.034 \| fine	92.906 \| fine	46.714 \| good	1.597 \| good	4.385 \| good	0.199 \| good
2025-07-31T17:00:00.000Z	73 \| moderate	20.73 \| fine	90.937 \| fine	52.932 \| good	1.408 \| good	3.617 \| good	0.196 \| good
2025-07-31T18:00:00.000Z	71 \| moderate	20.064 \| fine	88.843 \| fine	57.809 \| fine	1.218 \| good	2.848 \| good	0.193 \| good
2025-07-31T19:00:00.000Z	67 \| moderate	18.338 \| fine	80.953 \| fine	49.315 \| good	1.099 \| good	3.181 \| good	0.193 \| good
2025-07-31T20:00:00.000Z	64 \| moderate	16.096 \| fine	70.994 \| fine	36.762 \| good	0.979 \| good	3.514 \| good	0.193 \| good
2025-07-31T21:00:00.000Z	60 \| moderate	13.683 \| fine	61.109 \| fine	34.151 \| good	0.86 \| good	3.847 \| good	0.193 \| good

Norwalk

Get reliable air quality data to drive your business

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

0.33ppm

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 08:00:00 on 2025-07-29.

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 2025-07-28.

What is the AQI in Norwalk, Connecticut right now?

As of now, the AQI in Norwalk, Connecticut is 129, indicating Unhealthy for Sensitive Groups 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 12.53 μg/m³.

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

The PM₁₀ concentration in Norwalk, Connecticut is 39.544 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 0.318 ppm.

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

Currently, Norwalk, Connecticut has a sulfur dioxide (SO₂) concentration of 1.143 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 79.383 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 5.297 ppb.

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