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

The PM10 concentration in Connecticut, USA is 14.13 μg/m3 at the moment.

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

Currently, Connecticut, USA has a sulfur dioxide (SO2) concentration of 0.28 ppb.

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

The current ozone (O3) level in Connecticut, USA at the moment is 44.672 ppm.

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

Nitrogen dioxide (NO2) level in Connecticut, USA at the moment is 4.543 ppb.

Live air quality index in Connecticut, USA today

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

PM2.5 levels in Connecticut, USA are currently 4.97 μg/m3.

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

Connecticut, USA

Last updated: ... (Local time)

Major air pollutants in Connecticut, USA

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

4.97 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.13 μg/m³

155

255

425

605+

Ozone (O₃)

44.67 ppb

201

201+

Sulfur Dioxide (SO₂)

0.28 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.54 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 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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Connecticut, USA

Scroll To Air Quality Map

Track live Connecticut, USA air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-27T21:00:00.000Z	36 \| good	2.484 \| good	7.442 \| good	38.824 \| good	0.136 \| good	2.571 \| good	0.188 \| good
2026-03-27T22:00:00.000Z	35 \| good	2.476 \| good	7.405 \| good	37.598 \| good	0.192 \| good	3.58 \| good	0.166 \| good
2026-03-27T23:00:00.000Z	37 \| good	2.395 \| good	7.51 \| good	39.755 \| good	0.192 \| good	3.887 \| good	0.188 \| good
2026-03-28T00:00:00.000Z	37 \| good	2.498 \| good	6.652 \| good	40.093 \| good	0.124 \| good	5.88 \| good	0.188 \| good
2026-03-28T01:00:00.000Z	34 \| good	2.866 \| good	7.597 \| good	37.033 \| good	0.162 \| good	8.191 \| good	0.188 \| good
2026-03-28T02:00:00.000Z	32 \| good	3.672 \| good	10.268 \| good	34.75 \| good	0.147 \| good	9.089 \| good	0.196 \| good
2026-03-28T03:00:00.000Z	24 \| good	4.346 \| good	11.285 \| good	25.938 \| good	0.13 \| good	9.656 \| good	0.248 \| good
2026-03-28T04:00:00.000Z	28 \| good	4.861 \| good	11.401 \| good	29.787 \| good	0.157 \| good	11.158 \| good	0.232 \| good
2026-03-28T05:00:00.000Z	31 \| good	5.133 \| good	11.39 \| good	33.52 \| good	0.128 \| good	12.046 \| good	0.233 \| good
2026-03-28T06:00:00.000Z	31 \| good	5.139 \| good	11.477 \| good	34.446 \| good	0.169 \| good	12.396 \| good	0.205 \| good
2026-03-28T07:00:00.000Z	32 \| good	4.768 \| good	9.766 \| good	35.346 \| good	0.164 \| good	8.545 \| good	0.174 \| good
2026-03-28T08:00:00.000Z	30 \| good	4.238 \| good	8.777 \| good	31.559 \| good	0.126 \| good	5.877 \| good	0.181 \| good
2026-03-28T09:00:00.000Z	32 \| good	4.309 \| good	10.455 \| good	35.24 \| good	0.126 \| good	4.154 \| good	0.181 \| good
2026-03-28T10:00:00.000Z	31 \| good	4.326 \| good	10.485 \| good	34.366 \| good	0.126 \| good	5.381 \| good	0.159 \| good
2026-03-28T11:00:00.000Z	31 \| good	4.406 \| good	12.225 \| good	34.207 \| good	0.12 \| good	4.937 \| good	0.129 \| good
2026-03-28T12:00:00.000Z	32 \| good	4.335 \| good	11.435 \| good	35.257 \| good	0.148 \| good	4.453 \| good	0.159 \| good
2026-03-28T13:00:00.000Z	32 \| good	4.348 \| good	11.539 \| good	35.124 \| good	0.209 \| good	3.34 \| good	0.205 \| good
2026-03-28T14:00:00.000Z	34 \| good	4.179 \| good	11.579 \| good	37.049 \| good	0.147 \| good	2.887 \| good	0.174 \| good
2026-03-28T15:00:00.000Z	35 \| good	4.084 \| good	10.622 \| good	37.587 \| good	0.142 \| good	2.209 \| good	0.166 \| good
2026-03-28T16:00:00.000Z	36 \| good	4.08 \| good	10.585 \| good	38.817 \| good	0.153 \| good	1.985 \| good	0.129 \| good
2026-03-28T17:00:00.000Z	38 \| good	4.088 \| good	9.989 \| good	41.451 \| good	0.207 \| good	1.969 \| good	0.129 \| good
2026-03-28T18:00:00.000Z	40 \| good	4.008 \| good	10.896 \| good	42.531 \| good	0.164 \| good	1.802 \| good	0.151 \| good
2026-03-28T19:00:00.000Z	37 \| good	3.993 \| good	9.988 \| good	40.007 \| good	0.165 \| good	2.045 \| good	0.151 \| good
2026-03-28T20:00:00.000Z	39 \| good	3.779 \| good	8.081 \| good	41.727 \| good	0.154 \| good	2.118 \| good	0.151 \| good
2026-03-28T21:00:00.000Z	38 \| good	3.414 \| good	7.944 \| good	40.86 \| good	0.118 \| good	2.324 \| good	0.188 \| good
2026-03-28T22:00:00.000Z	39 \| good	3.209 \| good	7.907 \| good	41.691 \| good	0.119 \| good	2.227 \| good	0.166 \| good
2026-03-28T23:00:00.000Z	39 \| good	3.102 \| good	6.975 \| good	41.718 \| good	0.13 \| good	2.61 \| good	0.151 \| good
2026-03-29T00:00:00.000Z	37 \| good	3.109 \| good	6.95 \| good	39.687 \| good	0.2 \| good	3.422 \| good	0.151 \| good
2026-03-29T01:00:00.000Z	37 \| good	3.29 \| good	7.757 \| good	40.164 \| good	0.236 \| good	5.41 \| good	0.196 \| good
2026-03-29T02:00:00.000Z	34 \| good	3.646 \| good	8.615 \| good	37.088 \| good	0.163 \| good	7.26 \| good	0.204 \| good
2026-03-29T03:00:00.000Z	27 \| good	5.085 \| good	21.979 \| good	28.391 \| good	0.623 \| good	4.207 \| good	0.215 \| good
2026-03-29T04:00:00.000Z	34 \| good	4.267 \| good	8.798 \| good	36.943 \| good	0.148 \| good	11.831 \| good	0.24 \| good
2026-03-29T05:00:00.000Z	28 \| good	4.522 \| good	9.766 \| good	29.551 \| good	0.235 \| good	13.461 \| good	0.203 \| good
2026-03-29T06:00:00.000Z	30 \| good	4.522 \| good	9.766 \| good	32.219 \| good	0.235 \| good	14.794 \| good	0.203 \| good
2026-03-29T07:00:00.000Z	27 \| good	5.191 \| good	10.023 \| good	28.354 \| good	0.424 \| good	16.797 \| good	0.229 \| good
2026-03-29T08:00:00.000Z	38 \| good	6.861 \| good	16.04 \| good	21.623 \| good	0.262 \| good	26.554 \| good	0.274 \| good
2026-03-29T09:00:00.000Z	38 \| good	6.868 \| good	14.34 \| good	22.407 \| good	0.43 \| good	29.117 \| good	0.311 \| good
2026-03-29T10:00:00.000Z	38 \| good	6.959 \| good	13.482 \| good	24.563 \| good	0.379 \| good	24.513 \| good	0.29 \| good
2026-03-29T11:00:00.000Z	38 \| good	6.996 \| good	13.609 \| good	20.065 \| good	0.469 \| good	20.105 \| good	0.342 \| good
2026-03-29T12:00:00.000Z	38 \| good	7.462 \| good	16.195 \| good	21.25 \| good	0.46 \| good	17.335 \| good	0.342 \| good
2026-03-29T13:00:00.000Z	44 \| good	7.516 \| good	16.642 \| good	18.099 \| good	0.429 \| good	16.248 \| good	0.308 \| good
2026-03-29T14:00:00.000Z	33 \| good	6.184 \| good	12.557 \| good	22.147 \| good	0.404 \| good	9.029 \| good	0.187 \| good
2026-03-29T15:00:00.000Z	33 \| good	4.97 \| good	9.825 \| good	35.662 \| good	0.388 \| good	6.222 \| good	0.179 \| good
2026-03-29T16:00:00.000Z	31 \| good	4.475 \| good	10.52 \| good	33.575 \| good	0.284 \| good	4.172 \| good	0.195 \| good
2026-03-29T17:00:00.000Z	35 \| good	4.707 \| good	10.202 \| good	38.101 \| good	0.269 \| good	3.425 \| good	0.263 \| good
2026-03-29T18:00:00.000Z	37 \| good	4.964 \| good	10.77 \| good	40.412 \| good	0.267 \| good	5.266 \| good	0.206 \| good
2026-03-29T19:00:00.000Z	41 \| good	5.152 \| good	12.552 \| good	43.515 \| good	0.272 \| good	4.612 \| good	0.206 \| good
2026-03-29T20:00:00.000Z	42 \| good	5.466 \| good	13.565 \| good	44.975 \| good	0.297 \| good	4.373 \| good	0.206 \| good
2026-03-29T20:00:00.000Z	42 \| good	4.97 \| good	14.13 \| good	44.672 \| good	0.28 \| good	4.543 \| good	0.22 \| good
2026-03-29T21:00:00.000Z	44 \| good	7.033 \| good	31.09 \| good	48.288 \| good	2.687 \| good	6.416 \| good	0.187 \| good
2026-03-29T22:00:00.000Z	42 \| good	7.36 \| good	32.699 \| good	44.712 \| good	2.6 \| good	7.885 \| good	0.198 \| good
2026-03-29T23:00:00.000Z	39 \| good	7.053 \| good	31.143 \| good	42.353 \| good	2.512 \| good	9.355 \| good	0.21 \| good
2026-03-30T00:00:00.000Z	44 \| good	7.759 \| good	34.051 \| good	38.485 \| good	2.425 \| good	10.825 \| good	0.221 \| good
2026-03-30T01:00:00.000Z	44 \| good	8.25 \| good	36.359 \| good	37.67 \| good	2.258 \| good	10.481 \| good	0.218 \| good
2026-03-30T02:00:00.000Z	54 \| moderate	11.34 \| good	50.224 \| good	33.667 \| good	2.09 \| good	10.137 \| good	0.215 \| good
2026-03-30T03:00:00.000Z	58 \| moderate	12.638 \| fine	56.499 \| fine	31.04 \| good	1.922 \| good	9.793 \| good	0.211 \| good
2026-03-30T04:00:00.000Z	56 \| moderate	12.029 \| good	53.712 \| good	31.04 \| good	1.806 \| good	8.678 \| good	0.198 \| good
2026-03-30T05:00:00.000Z	54 \| moderate	11.019 \| good	48.885 \| good	31.098 \| good	1.689 \| good	7.563 \| good	0.184 \| good
2026-03-30T06:00:00.000Z	44 \| good	7.675 \| good	33.807 \| good	30.101 \| good	1.572 \| good	6.448 \| good	0.17 \| good
2026-03-30T07:00:00.000Z	31 \| good	3.951 \| good	17.037 \| good	34.461 \| good	1.544 \| good	5.726 \| good	0.17 \| good
2026-03-30T08:00:00.000Z	29 \| good	3.89 \| good	16.938 \| good	31.198 \| good	1.516 \| good	5.003 \| good	0.171 \| good
2026-03-30T09:00:00.000Z	28 \| good	3.898 \| good	17.045 \| good	29.924 \| good	1.487 \| good	4.28 \| good	0.171 \| good
2026-03-30T10:00:00.000Z	27 \| good	4.72 \| good	20.546 \| good	23.067 \| good	1.577 \| good	4.791 \| good	0.182 \| good
2026-03-30T11:00:00.000Z	33 \| good	5.673 \| good	24.235 \| good	21.532 \| good	1.666 \| good	5.302 \| good	0.194 \| good
2026-03-30T12:00:00.000Z	33 \| good	6.182 \| good	27.782 \| good	22.795 \| good	1.756 \| good	5.813 \| good	0.206 \| good
2026-03-30T13:00:00.000Z	44 \| good	7.586 \| good	33.22 \| good	26.026 \| good	1.866 \| good	5.801 \| good	0.203 \| good
2026-03-30T14:00:00.000Z	44 \| good	7.539 \| good	33.17 \| good	29.973 \| good	1.977 \| good	5.788 \| good	0.201 \| good
2026-03-30T15:00:00.000Z	38 \| good	7.068 \| good	31.366 \| good	30.786 \| good	2.087 \| good	5.776 \| good	0.198 \| good
2026-03-30T16:00:00.000Z	33 \| good	6.102 \| good	27.093 \| good	31.023 \| good	2.168 \| good	5.015 \| good	0.19 \| good
2026-03-30T17:00:00.000Z	33 \| good	5.877 \| good	25.239 \| good	29.987 \| good	2.25 \| good	4.255 \| good	0.182 \| good
2026-03-30T18:00:00.000Z	49 \| good	8.928 \| good	39.522 \| good	39.282 \| good	2.331 \| good	3.495 \| good	0.174 \| good
2026-03-30T19:00:00.000Z	49 \| good	8.625 \| good	37.716 \| good	35.819 \| good	2.295 \| good	3.423 \| good	0.172 \| good
2026-03-30T20:00:00.000Z	44 \| good	7.921 \| good	34.445 \| good	34.988 \| good	2.258 \| good	3.35 \| good	0.171 \| good
2026-03-30T21:00:00.000Z	44 \| good	7.519 \| good	32.953 \| good	36.903 \| good	2.222 \| good	3.278 \| good	0.17 \| good
2026-03-30T22:00:00.000Z	35 \| good	6.395 \| good	28.783 \| good	38.18 \| good	2.372 \| good	5.224 \| good	0.183 \| good
2026-03-30T23:00:00.000Z	49 \| good	8.846 \| good	38.973 \| good	35.304 \| good	2.522 \| good	7.17 \| good	0.196 \| good
2026-03-31T00:00:00.000Z	52 \| moderate	9.506 \| good	42.616 \| good	36.013 \| good	2.672 \| good	9.117 \| good	0.21 \| good
2026-03-31T01:00:00.000Z	54 \| moderate	11.237 \| good	50.018 \| good	36.801 \| good	2.743 \| good	9.523 \| good	0.213 \| good
2026-03-31T02:00:00.000Z	66 \| moderate	17.121 \| fine	75.718 \| fine	21.188 \| good	2.813 \| good	9.93 \| good	0.217 \| good
2026-03-31T03:00:00.000Z	66 \| moderate	17.217 \| fine	76.618 \| fine	12.138 \| good	2.884 \| good	10.337 \| good	0.22 \| good
2026-03-31T04:00:00.000Z	64 \| moderate	16.335 \| fine	72.463 \| fine	12.758 \| good	2.785 \| good	9.774 \| good	0.214 \| good
2026-03-31T05:00:00.000Z	60 \| moderate	14.093 \| fine	63.653 \| fine	16.53 \| good	2.685 \| good	9.212 \| good	0.208 \| good
2026-03-31T06:00:00.000Z	60 \| moderate	13.825 \| fine	14.028 \| good	35.998 \| good	2.585 \| good	8.644 \| good	0.202 \| good
2026-03-31T07:00:00.000Z	44 \| good	8.15 \| good	35.693 \| good	29.765 \| good	2.455 \| good	7.905 \| good	0.195 \| good
2026-03-31T08:00:00.000Z	52 \| moderate	9.6 \| good	42.806 \| good	26.162 \| good	2.325 \| good	7.161 \| good	0.188 \| good
2026-03-31T09:00:00.000Z	52 \| moderate	10.089 \| good	44.787 \| good	20.412 \| good	2.195 \| good	6.417 \| good	0.181 \| good
2026-03-31T10:00:00.000Z	27 \| good	5.238 \| good	22.692 \| good	28.358 \| good	2.039 \| good	6.691 \| good	0.179 \| good
2026-03-31T11:00:00.000Z	26 \| good	4.417 \| good	19.344 \| good	27.639 \| good	1.884 \| good	6.965 \| good	0.177 \| good
2026-03-31T12:00:00.000Z	54 \| moderate	10.666 \| good	11.018 \| good	35.335 \| good	1.728 \| good	7.235 \| good	0.175 \| good
2026-03-31T13:00:00.000Z	54 \| moderate	10.732 \| good	11.092 \| good	35.535 \| good	1.762 \| good	6.927 \| good	0.179 \| good
2026-03-31T14:00:00.000Z	52 \| moderate	10.216 \| good	10.553 \| good	35.735 \| good	1.796 \| good	6.618 \| good	0.183 \| good
2026-03-31T15:00:00.000Z	52 \| moderate	10.146 \| good	10.55 \| good	35.935 \| good	1.831 \| good	6.31 \| good	0.186 \| good
2026-03-31T16:00:00.000Z	52 \| moderate	10.032 \| good	10.418 \| good	38.883 \| good	1.772 \| good	5.655 \| good	0.181 \| good
2026-03-31T17:00:00.000Z	44 \| good	7.746 \| good	33.737 \| good	34.975 \| good	1.715 \| good	5.004 \| good	0.176 \| good
2026-03-31T18:00:00.000Z	52 \| moderate	9.897 \| good	10.221 \| good	44.78 \| good	1.656 \| good	4.344 \| good	0.171 \| good
2026-03-31T19:00:00.000Z	52 \| moderate	9.938 \| good	10.276 \| good	45.555 \| good	1.665 \| good	4.69 \| good	0.172 \| good
2026-03-31T20:00:00.000Z	52 \| moderate	10.071 \| good	10.422 \| good	46.33 \| good	1.674 \| good	5.036 \| good	0.173 \| good

Connecticut

Get reliable air quality data to drive your business

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

Air quality in cities of Connecticut, USA

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
Ansonia, Connecticut	40 Good	5.20μg/m³ Good	11.55μg/m³ Good	43.18ppb Good	0.30ppb Good	4.50ppb Good	0.19ppm Good
Avon, Connecticut	41 Good	5.15μg/m³ Good	12.24μg/m³ Good	43.94ppb Good	0.23ppb Good	6.10ppb Good	0.25ppm Good
Berlin, Connecticut	41 Good	5.12μg/m³ Good	12.22μg/m³ Good	44.30ppb Good	0.24ppb Good	4.68ppb Good	0.24ppm Good
Bethel, Connecticut	35 Good	5.84μg/m³ Good	11.13μg/m³ Good	38.20ppb Good	0.33ppb Good	4.49ppb Good	0.23ppm Good
Bloomfield, Connecticut	39 Good	5.17μg/m³ Good	12.30μg/m³ Good	42.45ppb Good	0.22ppb Good	7.32ppb Good	0.28ppm Good
Branford, Connecticut	37 Good	4.78μg/m³ Good	12.04μg/m³ Good	39.75ppb Good	0.21ppb Good	5.23ppb Good	0.13ppm Good
Bridgeport, Connecticut	40 Good	5.20μg/m³ Good	11.06μg/m³ Good	42.73ppb Good	0.50ppb Good	3.86ppb Good	0.22ppm Good
Bristol, Connecticut	41 Good	4.77μg/m³ Good	11.42μg/m³ Good	44.37ppb Good	0.24ppb Good	4.96ppb Good	0.21ppm Good
Brookfield, Connecticut	35 Good	5.78μg/m³ Good	11.26μg/m³ Good	38.21ppb Good	0.33ppb Good	4.47ppb Good	0.23ppm Good
Canton, Connecticut	41 Good	4.85μg/m³ Good	14.44μg/m³ Good	43.56ppb Good	0.23ppb Good	5.81ppb Good	0.22ppm Good
Cheshire, Connecticut	41 Good	4.77μg/m³ Good	11.26μg/m³ Good	44.05ppb Good	0.25ppb Good	4.93ppb Good	0.18ppm Good
Clinton, Connecticut	40 Good	4.66μg/m³ Good	13.08μg/m³ Good	42.99ppb Good	0.17ppb Good	2.61ppb Good	0.20ppm Good
Colchester, Connecticut	40 Good	4.93μg/m³ Good	12.57μg/m³ Good	43.27ppb Good	0.17ppb Good	5.22ppb Good	0.23ppm Good
Coventry, Connecticut	42 Good	4.58μg/m³ Good	11.54μg/m³ Good	44.73ppb Good	0.15ppb Good	4.81ppb Good	0.23ppm Good
Cromwell, Connecticut	39 Good	5.11μg/m³ Good	12.27μg/m³ Good	42.00ppb Good	0.22ppb Good	5.94ppb Good	0.23ppm Good
Danbury, Connecticut	35 Good	5.90μg/m³ Good	11.02μg/m³ Good	38.00ppb Good	0.32ppb Good	4.55ppb Good	0.24ppm Good
Darien, Connecticut	39 Good	5.65μg/m³ Good	26.82μg/m³ Good	42.49ppb Good	0.36ppb Good	5.59ppb Good	0.24ppm Good
Derby, Connecticut	40 Good	5.20μg/m³ Good	11.55μg/m³ Good	43.18ppb Good	0.30ppb Good	4.50ppb Good	0.19ppm Good
East Hampton, Connecticut	39 Good	5.13μg/m³ Good	12.34μg/m³ Good	41.94ppb Good	0.17ppb Good	5.43ppb Good	0.23ppm Good
East Hartford, Connecticut	39 Good	4.89μg/m³ Good	12.10μg/m³ Good	42.17ppb Good	0.22ppb Good	5.26ppb Good	0.28ppm Good
East Haven, Connecticut	36 Good	4.74μg/m³ Good	12.03μg/m³ Good	38.58ppb Good	0.21ppb Good	5.64ppb Good	0.11ppm Good
East Lyme, Connecticut	41 Good	4.83μg/m³ Good	17.03μg/m³ Good	44.20ppb Good	0.14ppb Good	2.40ppb Good	0.22ppm Good
East Windsor, Connecticut	42 Good	4.59μg/m³ Good	14.00μg/m³ Good	45.00ppb Good	0.17ppb Good	5.09ppb Good	0.25ppm Good
Ellington, Connecticut	41 Good	4.28μg/m³ Good	14.47μg/m³ Good	43.70ppb Good	0.18ppb Good	5.13ppb Good	0.24ppm Good
Enfield, Connecticut	42 Good	4.26μg/m³ Good	12.79μg/m³ Good	45.07ppb Good	0.18ppb Good	4.84ppb Good	0.22ppm Good
Fairfield, Connecticut	40 Good	5.38μg/m³ Good	13.02μg/m³ Good	43.04ppb Good	0.44ppb Good	3.47ppb Good	0.22ppm Good
Farmington, Connecticut	41 Good	5.14μg/m³ Good	13.04μg/m³ Good	43.75ppb Good	0.23ppb Good	5.46ppb Good	0.23ppm Good
Glastonbury, Connecticut	39 Good	4.96μg/m³ Good	12.28μg/m³ Good	42.32ppb Good	0.22ppb Good	5.83ppb Good	0.26ppm Good
Granby, Connecticut	41 Good	4.74μg/m³ Good	10.80μg/m³ Good	43.76ppb Good	0.22ppb Good	5.13ppb Good	0.22ppm Good
Greenwich, Connecticut	38 Good	5.45μg/m³ Good	23.34μg/m³ Good	41.00ppb Good	0.35ppb Good	6.04ppb Good	0.26ppm Good
Griswold, Connecticut	40 Good	4.59μg/m³ Good	16.22μg/m³ Good	43.16ppb Good	0.15ppb Good	1.96ppb Good	0.23ppm Good
Groton, Connecticut	42 Good	4.79μg/m³ Good	9.00μg/m³ Good	44.98ppb Good	0.16ppb Good	2.96ppb Good	0.22ppm Good
Guilford, Connecticut	42 Good	4.80μg/m³ Good	10.70μg/m³ Good	44.54ppb Good	0.23ppb Good	5.10ppb Good	0.17ppm Good
Hamden, Connecticut	37 Good	4.86μg/m³ Good	12.06μg/m³ Good	39.84ppb Good	0.24ppb Good	5.45ppb Good	0.14ppm Good
Hartford, Connecticut	40 Good	5.46μg/m³ Good	12.01μg/m³ Good	42.55ppb Good	0.22ppb Good	9.15ppb Good	0.30ppm Good
Killingly, Connecticut	40 Good	3.94μg/m³ Good	14.02μg/m³ Good	43.12ppb Good	0.14ppb Good	2.29ppb Good	0.24ppm Good
Ledyard, Connecticut	41 Good	4.02μg/m³ Good	8.13μg/m³ Good	44.48ppb Good	0.17ppb Good	2.90ppb Good	0.22ppm Good
Madison, Connecticut	40 Good	4.70μg/m³ Good	13.01μg/m³ Good	42.88ppb Good	0.17ppb Good	2.91ppb Good	0.20ppm Good
Manchester, Connecticut	41 Good	4.90μg/m³ Good	14.37μg/m³ Good	43.78ppb Good	0.17ppb Good	5.29ppb Good	0.26ppm Good
Mansfield, Connecticut	41 Good	4.17μg/m³ Good	12.62μg/m³ Good	44.09ppb Good	0.14ppb Good	3.92ppb Good	0.23ppm Good
Meriden, Connecticut	42 Good	4.87μg/m³ Good	14.20μg/m³ Good	44.89ppb Good	0.25ppb Good	4.73ppb Good	0.19ppm Good
Middletown, Connecticut	39 Good	5.11μg/m³ Good	12.30μg/m³ Good	41.99ppb Good	0.22ppb Good	5.87ppb Good	0.22ppm Good
Milford, Connecticut	41 Good	5.21μg/m³ Good	12.38μg/m³ Good	43.58ppb Good	0.36ppb Good	4.30ppb Good	0.20ppm Good
Monroe, Connecticut	40 Good	5.28μg/m³ Good	10.92μg/m³ Good	43.08ppb Good	0.36ppb Good	4.25ppb Good	0.22ppm Good
Montville, Connecticut	41 Good	4.53μg/m³ Good	9.16μg/m³ Good	44.46ppb Good	0.17ppb Good	3.03ppb Good	0.22ppm Good
Naugatuck, Connecticut	41 Good	5.19μg/m³ Good	12.81μg/m³ Good	43.57ppb Good	0.28ppb Good	4.61ppb Good	0.20ppm Good
New Britain, Connecticut	41 Good	5.12μg/m³ Good	12.22μg/m³ Good	44.30ppb Good	0.24ppb Good	4.68ppb Good	0.24ppm Good
New Canaan, Connecticut	39 Good	5.42μg/m³ Good	14.59μg/m³ Good	41.99ppb Good	0.33ppb Good	6.29ppb Good	0.24ppm Good
New Fairfield, Connecticut	34 Good	5.66μg/m³ Good	11.01μg/m³ Good	37.47ppb Good	0.32ppb Good	4.54ppb Good	0.23ppm Good
New Haven, Connecticut	35 Good	4.71μg/m³ Good	11.99μg/m³ Good	38.20ppb Good	0.20ppb Good	5.74ppb Good	0.10ppm Good

City	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
No results found

0.19ppm

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

Air quality levels in US

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Frequently asked questions

How often is air quality information updated for Connecticut, USA?

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

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

In the past 24 hours, the air quality in Connecticut, USA was at its worst at 01:00:00 on 2026-03-29.

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

In the last 24 hours, the best air quality in Connecticut, USA was observed at 07:00:00 on 2026-03-29.

What is the AQI in Connecticut, USA right now?

As of now, the AQI in Connecticut, USA is 42, indicating Good conditions.

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

Connecticut, USA air has the highest levels of O3.

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

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

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

PM_2.5 levels in Connecticut, USA are currently 4.97 μg/m³.

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

The PM₁₀ concentration in Connecticut, USA is 14.13 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Connecticut, USA is 0.22 ppm.

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

Currently, Connecticut, USA has a sulfur dioxide (SO₂) concentration of 0.28 ppb.

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

The current ozone (O₃) level in Connecticut, USA at the moment is 44.672 ppm.

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

Nitrogen dioxide (NO₂) level in Connecticut, USA at the moment is 4.543 ppb.

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