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

The PM10 concentration in Connecticut, USA is 15.732 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 0.214 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 27.405 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 10.802 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 6.68 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)

6.68 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

15.73 μg/m³

155

255

425

605+

Ozone (O₃)

27.41 ppb

201

201+

Sulfur Dioxide (SO₂)

0.21 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

10.80 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

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

Please contact us for custom requests

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
2026-03-06T01:00:00.000Z	52 \| moderate	9.795 \| good	14.626 \| good	26.107 \| good	0.227 \| good	19.06 \| good	0.182 \| good
2026-03-06T02:00:00.000Z	44 \| good	7.681 \| good	11.028 \| good	20.723 \| good	0.172 \| good	12.026 \| good	0.183 \| good
2026-03-06T03:00:00.000Z	28 \| good	3.026 \| good	12.664 \| good	30.074 \| good	0.442 \| good	4.942 \| good	0.182 \| good
2026-03-06T04:00:00.000Z	29 \| good	3.969 \| good	5.979 \| good	30.888 \| good	0.172 \| good	5.512 \| good	0.181 \| good
2026-03-06T05:00:00.000Z	27 \| good	2.803 \| good	3.999 \| good	28.775 \| good	0.172 \| good	5.672 \| good	0.167 \| good
2026-03-06T06:00:00.000Z	31 \| good	1.935 \| good	3.074 \| good	33.212 \| good	0.172 \| good	6.581 \| good	0.153 \| good
2026-03-06T07:00:00.000Z	31 \| good	1.881 \| good	3.057 \| good	33.442 \| good	0.172 \| good	4.707 \| good	0.151 \| good
2026-03-06T08:00:00.000Z	31 \| good	1.285 \| good	2.04 \| good	33.373 \| good	0.178 \| good	4.695 \| good	0.14 \| good
2026-03-06T09:00:00.000Z	31 \| good	0.927 \| good	1.93 \| good	33.985 \| good	0.208 \| good	6.24 \| good	0.14 \| good
2026-03-06T10:00:00.000Z	31 \| good	0.983 \| good	1.892 \| good	33.313 \| good	0.208 \| good	5.914 \| good	0.124 \| good
2026-03-06T11:00:00.000Z	32 \| good	0.946 \| good	2.203 \| good	34.778 \| good	0.172 \| good	6.246 \| good	0.139 \| good
2026-03-06T12:00:00.000Z	32 \| good	0.979 \| good	2.158 \| good	35.468 \| good	0.228 \| good	7.729 \| good	0.147 \| good
2026-03-06T13:00:00.000Z	31 \| good	0.983 \| good	2.332 \| good	33.447 \| good	0.228 \| good	7.611 \| good	0.14 \| good
2026-03-06T14:00:00.000Z	30 \| good	1.096 \| good	1.932 \| good	32.351 \| good	0.208 \| good	7.946 \| good	0.174 \| good
2026-03-06T15:00:00.000Z	33 \| good	1.648 \| good	2.927 \| good	35.711 \| good	0.226 \| good	7.121 \| good	0.137 \| good
2026-03-06T16:00:00.000Z	32 \| good	2.131 \| good	3.827 \| good	34.918 \| good	0.208 \| good	6.558 \| good	0.129 \| good
2026-03-06T17:00:00.000Z	31 \| good	2.491 \| good	4.746 \| good	34.297 \| good	0.208 \| good	6.162 \| good	0.129 \| good
2026-03-06T18:00:00.000Z	32 \| good	3.036 \| good	6.634 \| good	34.789 \| good	0.226 \| good	6.535 \| good	0.159 \| good
2026-03-06T19:00:00.000Z	33 \| good	3.445 \| good	7.609 \| good	36.199 \| good	0.226 \| good	6.128 \| good	0.167 \| good
2026-03-06T20:00:00.000Z	33 \| good	3.659 \| good	8.497 \| good	35.799 \| good	0.226 \| good	6.036 \| good	0.166 \| good
2026-03-06T21:00:00.000Z	31 \| good	4.043 \| good	9.442 \| good	33.94 \| good	0.226 \| good	7.111 \| good	0.181 \| good
2026-03-06T22:00:00.000Z	31 \| good	4.131 \| good	9.447 \| good	34.245 \| good	0.232 \| good	8.64 \| good	0.174 \| good
2026-03-06T23:00:00.000Z	32 \| good	4.318 \| good	10.334 \| good	34.765 \| good	0.195 \| good	10.491 \| good	0.174 \| good
2026-03-07T00:00:00.000Z	30 \| good	4.892 \| good	10.422 \| good	32.366 \| good	0.208 \| good	10.236 \| good	0.218 \| good
2026-03-07T01:00:00.000Z	33 \| good	5.586 \| good	10.377 \| good	30.526 \| good	0.21 \| good	9.13 \| good	0.181 \| good
2026-03-07T02:00:00.000Z	33 \| good	6.055 \| good	10.402 \| good	31.342 \| good	0.208 \| good	10.155 \| good	0.173 \| good
2026-03-07T03:00:00.000Z	33 \| good	6.319 \| good	10.42 \| good	28.161 \| good	0.21 \| good	7.705 \| good	0.166 \| good
2026-03-07T04:00:00.000Z	38 \| good	6.652 \| good	10.45 \| good	26.987 \| good	0.209 \| good	7.913 \| good	0.166 \| good
2026-03-07T05:00:00.000Z	38 \| good	7.225 \| good	10.603 \| good	25.542 \| good	0.322 \| good	8.754 \| good	0.166 \| good
2026-03-07T06:00:00.000Z	38 \| good	7.118 \| good	9.943 \| good	24.902 \| good	0.216 \| good	8.694 \| good	0.166 \| good
2026-03-07T07:00:00.000Z	38 \| good	7.067 \| good	10.592 \| good	26.576 \| good	0.216 \| good	8.516 \| good	0.154 \| good
2026-03-07T08:00:00.000Z	38 \| good	6.951 \| good	10.363 \| good	24.596 \| good	0.196 \| good	8.703 \| good	0.191 \| good
2026-03-07T09:00:00.000Z	38 \| good	7.012 \| good	9.101 \| good	23.421 \| good	0.196 \| good	8.059 \| good	0.166 \| good
2026-03-07T10:00:00.000Z	38 \| good	7.012 \| good	9.19 \| good	21.992 \| good	0.227 \| good	14.254 \| good	0.236 \| good
2026-03-07T11:00:00.000Z	38 \| good	7.161 \| good	9.992 \| good	23.023 \| good	0.229 \| good	14.9 \| good	0.244 \| good
2026-03-07T12:00:00.000Z	38 \| good	7.044 \| good	10.024 \| good	22.901 \| good	0.156 \| good	13.389 \| good	0.252 \| good
2026-03-07T13:00:00.000Z	38 \| good	6.861 \| good	9.78 \| good	20.233 \| good	0.228 \| good	11.782 \| good	0.286 \| good
2026-03-07T14:00:00.000Z	27 \| good	5.265 \| good	7.312 \| good	20.175 \| good	0.23 \| good	10.386 \| good	0.261 \| good
2026-03-07T15:00:00.000Z	22 \| good	4.164 \| good	5.918 \| good	23.429 \| good	0.231 \| good	9.557 \| good	0.265 \| good
2026-03-07T16:00:00.000Z	22 \| good	4.006 \| good	5.764 \| good	23.206 \| good	0.212 \| good	9.287 \| good	0.244 \| good
2026-03-07T17:00:00.000Z	22 \| good	4.178 \| good	5.814 \| good	21.884 \| good	0.214 \| good	8.974 \| good	0.243 \| good
2026-03-07T18:00:00.000Z	27 \| good	4.617 \| good	6.652 \| good	23.166 \| good	0.176 \| good	10.425 \| good	0.257 \| good
2026-03-07T19:00:00.000Z	33 \| good	5.534 \| good	8.509 \| good	25.522 \| good	0.176 \| good	7.395 \| good	0.265 \| good
2026-03-07T20:00:00.000Z	38 \| good	6.757 \| good	11.254 \| good	24.533 \| good	0.25 \| good	6.746 \| good	0.25 \| good
2026-03-07T21:00:00.000Z	38 \| good	7.33 \| good	12.345 \| good	25.344 \| good	0.269 \| good	9.313 \| good	0.25 \| good
2026-03-07T22:00:00.000Z	44 \| good	8.209 \| good	13.273 \| good	26.185 \| good	0.251 \| good	8.737 \| good	0.258 \| good
2026-03-07T23:00:00.000Z	52 \| moderate	9.505 \| good	15.159 \| good	28.329 \| good	0.199 \| good	10.93 \| good	0.288 \| good
2026-03-08T00:00:00.000Z	38 \| good	6.68 \| good	15.732 \| good	27.405 \| good	0.214 \| good	10.802 \| good	0.297 \| good
2026-03-08T01:00:00.000Z	58 \| moderate	13.414 \| fine	60.493 \| fine	15.064 \| good	1.512 \| good	19.223 \| good	0.23 \| good
2026-03-08T02:00:00.000Z	58 \| moderate	12.885 \| fine	58.304 \| fine	14.186 \| good	1.468 \| good	18.773 \| good	0.229 \| good
2026-03-08T03:00:00.000Z	56 \| moderate	12.331 \| fine	55.265 \| fine	10.286 \| good	1.425 \| good	18.322 \| good	0.228 \| good
2026-03-08T04:00:00.000Z	62 \| moderate	14.568 \| fine	65.221 \| fine	8.372 \| good	1.329 \| good	16.846 \| good	0.217 \| good
2026-03-08T05:00:00.000Z	60 \| moderate	13.855 \| fine	61.921 \| fine	9.336 \| good	1.233 \| good	15.37 \| good	0.206 \| good
2026-03-08T06:00:00.000Z	56 \| moderate	11.971 \| good	53.838 \| good	9.197 \| good	1.137 \| good	13.893 \| good	0.195 \| good
2026-03-08T07:00:00.000Z	56 \| moderate	11.594 \| good	51.183 \| good	12.827 \| good	1.194 \| good	11.569 \| good	0.184 \| good
2026-03-08T08:00:00.000Z	58 \| moderate	12.507 \| fine	56.611 \| fine	13.147 \| good	1.251 \| good	9.244 \| good	0.174 \| good
2026-03-08T09:00:00.000Z	58 \| moderate	13.431 \| fine	60.736 \| fine	9.234 \| good	1.308 \| good	6.92 \| good	0.163 \| good
2026-03-08T10:00:00.000Z	62 \| moderate	14.926 \| fine	66.807 \| fine	7.841 \| good	1.499 \| good	6.919 \| good	0.16 \| good
2026-03-08T11:00:00.000Z	56 \| moderate	12.471 \| fine	56.347 \| fine	12.282 \| good	1.69 \| good	6.918 \| good	0.157 \| good
2026-03-08T12:00:00.000Z	56 \| moderate	11.811 \| good	52.494 \| good	16.861 \| good	1.881 \| good	6.917 \| good	0.153 \| good
2026-03-08T13:00:00.000Z	54 \| moderate	11.11 \| good	49.127 \| good	21.512 \| good	1.96 \| good	6.995 \| good	0.155 \| good
2026-03-08T14:00:00.000Z	49 \| good	9.268 \| good	41.547 \| good	25.724 \| good	2.039 \| good	7.073 \| good	0.157 \| good
2026-03-08T15:00:00.000Z	52 \| moderate	10.33 \| good	45.911 \| good	26.976 \| good	2.118 \| good	7.151 \| good	0.159 \| good
2026-03-08T16:00:00.000Z	33 \| good	6.307 \| good	27.791 \| good	32.747 \| good	1.838 \| good	5.841 \| good	0.154 \| good
2026-03-08T17:00:00.000Z	33 \| good	4.205 \| good	18.571 \| good	36.102 \| good	1.559 \| good	4.531 \| good	0.15 \| good
2026-03-08T18:00:00.000Z	32 \| good	2.168 \| good	8.726 \| good	35.203 \| good	1.279 \| good	3.22 \| good	0.145 \| good
2026-03-08T19:00:00.000Z	32 \| good	2.928 \| good	12.203 \| good	35.233 \| good	1.059 \| good	3.046 \| good	0.15 \| good
2026-03-08T20:00:00.000Z	33 \| good	3.93 \| good	17.034 \| good	35.748 \| good	0.839 \| good	2.871 \| good	0.155 \| good
2026-03-08T21:00:00.000Z	34 \| good	4.693 \| good	20.245 \| good	36.741 \| good	0.62 \| good	2.697 \| good	0.161 \| good
2026-03-08T22:00:00.000Z	36 \| good	6.144 \| good	26.702 \| good	39.327 \| good	0.603 \| good	4.323 \| good	0.18 \| good
2026-03-08T23:00:00.000Z	40 \| good	7.186 \| good	31.691 \| good	42.581 \| good	0.586 \| good	5.95 \| good	0.199 \| good
2026-03-09T00:00:00.000Z	39 \| good	7.457 \| good	32.832 \| good	42.061 \| good	0.569 \| good	7.577 \| good	0.219 \| good
2026-03-09T01:00:00.000Z	37 \| good	5.975 \| good	26.629 \| good	39.942 \| good	0.666 \| good	8.309 \| good	0.231 \| good
2026-03-09T02:00:00.000Z	49 \| good	9.091 \| good	40.208 \| good	35.701 \| good	0.764 \| good	9.042 \| good	0.243 \| good
2026-03-09T03:00:00.000Z	49 \| good	8.822 \| good	39.003 \| good	34.98 \| good	0.861 \| good	9.775 \| good	0.255 \| good
2026-03-09T04:00:00.000Z	49 \| good	8.661 \| good	38.03 \| good	32.461 \| good	0.887 \| good	7.915 \| good	0.235 \| good
2026-03-09T05:00:00.000Z	49 \| good	8.606 \| good	38.092 \| good	31.036 \| good	0.913 \| good	6.056 \| good	0.216 \| good
2026-03-09T06:00:00.000Z	33 \| good	5.601 \| good	5.923 \| good	34.752 \| good	0.94 \| good	4.199 \| good	0.196 \| good
2026-03-09T07:00:00.000Z	44 \| good	7.858 \| good	34.51 \| good	26.125 \| good	0.909 \| good	3.875 \| good	0.191 \| good
2026-03-09T08:00:00.000Z	38 \| good	6.765 \| good	29.713 \| good	29.701 \| good	0.878 \| good	3.552 \| good	0.186 \| good
2026-03-09T09:00:00.000Z	33 \| good	5.998 \| good	26.208 \| good	26.279 \| good	0.848 \| good	3.23 \| good	0.181 \| good
2026-03-09T10:00:00.000Z	44 \| good	8.173 \| good	36.295 \| good	24.049 \| good	1.012 \| good	5.65 \| good	0.204 \| good
2026-03-09T11:00:00.000Z	52 \| moderate	9.506 \| good	41.9 \| good	24.306 \| good	1.175 \| good	8.069 \| good	0.226 \| good
2026-03-09T12:00:00.000Z	56 \| moderate	11.535 \| good	12.073 \| good	24.984 \| good	1.339 \| good	10.479 \| good	0.248 \| good
2026-03-09T13:00:00.000Z	52 \| moderate	10.36 \| good	10.887 \| good	27.562 \| good	2.004 \| good	9.257 \| good	0.235 \| good
2026-03-09T14:00:00.000Z	44 \| good	7.866 \| good	8.392 \| good	30.14 \| good	2.668 \| good	8.036 \| good	0.222 \| good
2026-03-09T15:00:00.000Z	38 \| good	7.144 \| good	7.708 \| good	32.718 \| good	3.332 \| good	6.814 \| good	0.208 \| good
2026-03-09T16:00:00.000Z	38 \| good	7.125 \| good	7.742 \| good	35.283 \| good	3.706 \| good	7.171 \| good	0.201 \| good
2026-03-09T17:00:00.000Z	39 \| good	1.366 \| good	5.238 \| good	41.682 \| good	4.081 \| good	7.529 \| good	0.194 \| good
2026-03-09T18:00:00.000Z	38 \| good	6.919 \| good	7.548 \| good	40.415 \| good	4.456 \| good	7.885 \| good	0.187 \| good
2026-03-09T19:00:00.000Z	38 \| good	6.949 \| good	7.544 \| good	41.01 \| good	4.051 \| good	8.039 \| good	0.186 \| good
2026-03-09T20:00:00.000Z	39 \| good	7.261 \| good	7.81 \| good	41.605 \| good	3.646 \| good	8.192 \| good	0.185 \| good
2026-03-09T21:00:00.000Z	44 \| good	7.539 \| good	8.039 \| good	42.201 \| good	3.241 \| good	8.346 \| good	0.185 \| good
2026-03-09T22:00:00.000Z	44 \| good	7.878 \| good	8.304 \| good	39.072 \| good	3.14 \| good	10.393 \| good	0.196 \| good
2026-03-09T23:00:00.000Z	49 \| good	8.609 \| good	9.01 \| good	35.943 \| good	3.038 \| good	12.439 \| good	0.208 \| good
2026-03-10T00:00:00.000Z	52 \| moderate	9.724 \| good	10.112 \| good	32.813 \| good	2.936 \| good	14.486 \| good	0.22 \| 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
Avon, Connecticut	49 Good	8.93μg/m³ Good	19.75μg/m³ Good	29.20ppb Good	0.19ppb Good	11.20ppb Good	0.33ppm Good
Berlin, Connecticut	49 Good	9.14μg/m³ Good	27.63μg/m³ Good	29.22ppb Good	0.19ppb Good	10.97ppb Good	0.31ppm Good
Bethel, Connecticut	58 Moderate	12.88μg/m³ Fine	19.93μg/m³ Good	21.05ppb Good	0.33ppb Good	14.94ppb Good	0.32ppm Good
Bloomfield, Connecticut	49 Good	9.43μg/m³ Good	15.68μg/m³ Good	29.19ppb Good	0.19ppb Good	14.74ppb Good	0.38ppm Good
Ansonia, Connecticut	38 Good	7.25μg/m³ Good	26.53μg/m³ Good	19.69ppb Good	0.19ppb Good	10.85ppb Good	0.28ppm Good
Brookfield, Connecticut	56 Moderate	12.46μg/m³ Fine	19.92μg/m³ Good	21.32ppb Good	0.32ppb Good	14.74ppb Good	0.32ppm Good
Bristol, Connecticut	44 Good	7.92μg/m³ Good	27.35μg/m³ Good	30.25ppb Good	0.19ppb Good	11.35ppb Good	0.28ppm Good
Cheshire, Connecticut	44 Good	7.69μg/m³ Good	27.28μg/m³ Good	20.87ppb Good	0.19ppb Good	11.30ppb Good	0.26ppm Good
Bridgeport, Connecticut	38 Good	6.59μg/m³ Good	14.06μg/m³ Good	23.73ppb Good	0.20ppb Good	12.30ppb Good	0.32ppm Good
Branford, Connecticut	27 Good	5.13μg/m³ Good	9.30μg/m³ Good	24.14ppb Good	0.19ppb Good	9.34ppb Good	0.22ppm Good
Canton, Connecticut	49 Good	8.72μg/m³ Good	19.88μg/m³ Good	30.97ppb Good	0.19ppb Good	11.34ppb Good	0.28ppm Good
Cromwell, Connecticut	30 Good	5.23μg/m³ Good	10.57μg/m³ Good	32.06ppb Good	0.19ppb Good	8.38ppb Good	0.30ppm Good
East Lyme, Connecticut	27 Good	3.20μg/m³ Good	8.36μg/m³ Good	29.48ppb Good	0.20ppb Good	5.62ppb Good	0.27ppm Good
Colchester, Connecticut	31 Good	2.26μg/m³ Good	7.38μg/m³ Good	33.37ppb Good	0.19ppb Good	9.50ppb Good	0.28ppm Good
Darien, Connecticut	49 Good	8.57μg/m³ Good	17.36μg/m³ Good	27.81ppb Good	0.35ppb Good	22.08ppb Good	0.35ppm Good
East Hartford, Connecticut	44 Good	8.29μg/m³ Good	12.66μg/m³ Good	29.17ppb Good	0.19ppb Good	11.77ppb Good	0.36ppm Good
East Windsor, Connecticut	38 Good	6.65μg/m³ Good	16.26μg/m³ Good	31.33ppb Good	0.19ppb Good	7.90ppb Good	0.31ppm Good
Coventry, Connecticut	31 Good	1.71μg/m³ Good	6.12μg/m³ Good	33.45ppb Good	0.18ppb Good	9.36ppb Good	0.29ppm Good
Danbury, Connecticut	58 Moderate	13.47μg/m³ Fine	20.00μg/m³ Good	20.99ppb Good	0.33ppb Good	15.27ppb Good	0.32ppm Good
East Hampton, Connecticut	30 Good	3.27μg/m³ Good	12.71μg/m³ Good	31.61ppb Good	0.19ppb Good	9.38ppb Good	0.30ppm Good
East Haven, Connecticut	33 Good	5.70μg/m³ Good	9.36μg/m³ Good	22.58ppb Good	0.19ppb Good	9.78ppb Good	0.21ppm Good
Clinton, Connecticut	25 Good	2.51μg/m³ Good	8.13μg/m³ Good	27.22ppb Good	0.19ppb Good	7.33ppb Good	0.26ppm Good
Derby, Connecticut	38 Good	7.25μg/m³ Good	26.53μg/m³ Good	19.69ppb Good	0.19ppb Good	10.85ppb Good	0.28ppm Good
Shelton, Connecticut	38 Good	7.25μg/m³ Good	26.53μg/m³ Good	19.69ppb Good	0.19ppb Good	10.85ppb Good	0.28ppm Good
Ellington, Connecticut	33 Good	5.80μg/m³ Good	15.21μg/m³ Good	33.78ppb Good	0.19ppb Good	9.11ppb Good	0.30ppm Good
Fairfield, Connecticut	38 Good	6.59μg/m³ Good	16.43μg/m³ Good	22.94ppb Good	0.23ppb Good	10.40ppb Good	0.32ppm Good
Farmington, Connecticut	49 Good	8.87μg/m³ Good	18.31μg/m³ Good	29.60ppb Good	0.19ppb Good	10.97ppb Good	0.30ppm Good
Enfield, Connecticut	44 Good	8.23μg/m³ Good	10.05μg/m³ Good	30.84ppb Good	0.19ppb Good	9.01ppb Good	0.28ppm Good
Granby, Connecticut	49 Good	9.00μg/m³ Good	19.90μg/m³ Good	29.73ppb Good	0.19ppb Good	11.23ppb Good	0.28ppm Good
Hamden, Connecticut	33 Good	6.33μg/m³ Good	10.77μg/m³ Good	23.93ppb Good	0.19ppb Good	10.07ppb Good	0.23ppm Good
Hartford, Connecticut	54 Moderate	10.65μg/m³ Good	16.74μg/m³ Good	28.75ppb Good	0.19ppb Good	17.63ppb Good	0.40ppm Good
Glastonbury, Connecticut	38 Good	7.20μg/m³ Good	12.01μg/m³ Good	30.42ppb Good	0.19ppb Good	11.04ppb Good	0.34ppm Good
New London, Connecticut	27 Good	3.69μg/m³ Good	5.02μg/m³ Good	29.02ppb Good	0.20ppb Good	5.32ppb Good	0.27ppm Good
Greenwich, Connecticut	44 Good	8.02μg/m³ Good	20.67μg/m³ Good	14.65ppb Good	0.37ppb Good	24.14ppb Good	0.37ppm Good
Groton, Connecticut	27 Good	3.69μg/m³ Good	5.02μg/m³ Good	29.02ppb Good	0.20ppb Good	5.32ppb Good	0.27ppm Good
Guilford, Connecticut	28 Good	4.48μg/m³ Good	13.41μg/m³ Good	30.32ppb Good	0.19ppb Good	9.40ppb Good	0.25ppm Good
Griswold, Connecticut	30 Good	2.14μg/m³ Good	8.94μg/m³ Good	31.90ppb Good	0.20ppb Good	5.45ppb Good	0.26ppm Good
Killingly, Connecticut	28 Good	2.14μg/m³ Good	7.51μg/m³ Good	30.35ppb Good	0.19ppb Good	5.38ppb Good	0.28ppm Good
Ledyard, Connecticut	28 Good	3.12μg/m³ Good	5.09μg/m³ Good	30.05ppb Good	0.21ppb Good	5.32ppb Good	0.26ppm Good
Madison, Connecticut	25 Good	2.78μg/m³ Good	8.37μg/m³ Good	27.47ppb Good	0.19ppb Good	7.55ppb Good	0.27ppm Good
Middletown, Connecticut	31 Good	4.69μg/m³ Good	10.12μg/m³ Good	32.68ppb Good	0.19ppb Good	7.57ppb Good	0.29ppm Good
Manchester, Connecticut	27 Good	5.28μg/m³ Good	10.63μg/m³ Good	29.39ppb Good	0.19ppb Good	6.96ppb Good	0.33ppm Good
Mansfield, Connecticut	31 Good	1.71μg/m³ Good	6.05μg/m³ Good	33.83ppb Good	0.18ppb Good	10.11ppb Good	0.28ppm Good
Milford, Connecticut	33 Good	6.11μg/m³ Good	15.03μg/m³ Good	23.21ppb Good	0.20ppb Good	11.27ppb Good	0.29ppm Good
Meriden, Connecticut	44 Good	7.66μg/m³ Good	13.82μg/m³ Good	29.78ppb Good	0.19ppb Good	11.34ppb Good	0.28ppm Good
North Branford, Connecticut	27 Good	5.15μg/m³ Good	15.90μg/m³ Good	28.98ppb Good	0.19ppb Good	9.43ppb Good	0.25ppm Good
Montville, Connecticut	28 Good	3.44μg/m³ Good	5.61μg/m³ Good	29.69ppb Good	0.20ppb Good	5.52ppb Good	0.27ppm Good
New Britain, Connecticut	49 Good	9.14μg/m³ Good	27.63μg/m³ Good	29.22ppb Good	0.19ppb Good	10.97ppb Good	0.31ppm Good
North Haven, Connecticut	33 Good	5.86μg/m³ Good	10.05μg/m³ Good	23.82ppb Good	0.19ppb Good	9.71ppb Good	0.23ppm Good
Monroe, Connecticut	38 Good	6.90μg/m³ Good	16.75μg/m³ Good	28.27ppb Good	0.19ppb Good	10.05ppb Good	0.31ppm Good

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

0.16ppm

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

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 11:00:00 on 2026-03-07.

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 05:00:00 on 2026-03-07.

What is the AQI in Connecticut, USA right now?

As of now, the AQI in Connecticut, USA is 38, indicating Good conditions.

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

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

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 6.68 μg/m³.

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

The PM₁₀ concentration in Connecticut, USA is 15.732 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 0.297 ppm.

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

Currently, Connecticut, USA has a sulfur dioxide (SO₂) concentration of 0.214 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 27.405 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 10.802 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions