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

The PM10 concentration in Connecticut, USA is 17.822 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 0.477 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 25.744 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 4.398 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 6.551 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)

6.55 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

17.82 μg/m³

155

255

425

605+

Ozone (O₃)

25.74 ppb

201

201+

Sulfur Dioxide (SO₂)

0.48 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.40 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Connecticut, USA

Get Live Pollen Counts

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
2026-08-12T18:00:00.000Z	33 \| good	5.79 \| good	22.06 \| good	29.458 \| good	0.476 \| good	2.274 \| good	0.173 \| good
2026-08-12T19:00:00.000Z	33 \| good	6.115 \| good	33.997 \| good	29.085 \| good	0.497 \| good	2.167 \| good	0.152 \| good
2026-08-12T20:00:00.000Z	33 \| good	5.77 \| good	23.745 \| good	31.931 \| good	0.513 \| good	2.148 \| good	0.152 \| good
2026-08-12T21:00:00.000Z	29 \| good	5.339 \| good	16.884 \| good	30.591 \| good	0.499 \| good	3.11 \| good	0.152 \| good
2026-08-12T22:00:00.000Z	27 \| good	5.179 \| good	13.509 \| good	29.246 \| good	0.179 \| good	3.327 \| good	0.159 \| good
2026-08-12T23:00:00.000Z	30 \| good	5.288 \| good	11.875 \| good	32.412 \| good	0.406 \| good	3.537 \| good	0.188 \| good
2026-08-13T00:00:00.000Z	33 \| good	6.001 \| good	26.482 \| good	27.974 \| good	0.354 \| good	7.1 \| good	0.224 \| good
2026-08-13T01:00:00.000Z	33 \| good	6.384 \| good	22.313 \| good	25.274 \| good	0.234 \| good	11.273 \| good	0.275 \| good
2026-08-13T02:00:00.000Z	39 \| good	6.666 \| good	19.013 \| good	41.525 \| good	0.211 \| good	12.214 \| good	0.276 \| good
2026-08-13T03:00:00.000Z	38 \| good	6.689 \| good	19 \| good	27.671 \| good	0.181 \| good	9.869 \| good	0.294 \| good
2026-08-13T04:00:00.000Z	38 \| good	6.735 \| good	19.442 \| good	34.654 \| good	0.214 \| good	11.855 \| good	0.286 \| good
2026-08-13T05:00:00.000Z	38 \| good	6.975 \| good	18.193 \| good	37.085 \| good	0.235 \| good	18.069 \| good	0.251 \| good
2026-08-13T06:00:00.000Z	38 \| good	6.908 \| good	15.602 \| good	32.354 \| good	0.249 \| good	7.553 \| good	0.251 \| good
2026-08-13T07:00:00.000Z	38 \| good	6.937 \| good	15.82 \| good	30.816 \| good	0.359 \| good	7.791 \| good	0.223 \| good
2026-08-13T08:00:00.000Z	38 \| good	6.906 \| good	13.745 \| good	26.09 \| good	0.538 \| good	7.35 \| good	0.214 \| good
2026-08-13T09:00:00.000Z	38 \| good	6.953 \| good	14.262 \| good	25.889 \| good	0.55 \| good	10.047 \| good	0.223 \| good
2026-08-13T10:00:00.000Z	38 \| good	6.829 \| good	11.937 \| good	25.386 \| good	0.581 \| good	10.179 \| good	0.273 \| good
2026-08-13T11:00:00.000Z	38 \| good	6.844 \| good	11.962 \| good	24.311 \| good	0.58 \| good	9.168 \| good	0.222 \| good
2026-08-13T12:00:00.000Z	38 \| good	6.88 \| good	12.258 \| good	27.746 \| good	0.504 \| good	9.522 \| good	0.233 \| good
2026-08-13T13:00:00.000Z	38 \| good	7.024 \| good	13.164 \| good	30.177 \| good	0.49 \| good	9.547 \| good	0.247 \| good
2026-08-13T14:00:00.000Z	38 \| good	7.394 \| good	13.01 \| good	31.345 \| good	0.53 \| good	4.247 \| good	0.215 \| good
2026-08-13T15:00:00.000Z	44 \| good	8.167 \| good	13.993 \| good	29.685 \| good	0.488 \| good	2.979 \| good	0.215 \| good
2026-08-13T16:00:00.000Z	49 \| good	9.33 \| good	16.615 \| good	34.385 \| good	0.564 \| good	4.703 \| good	0.273 \| good
2026-08-13T17:00:00.000Z	52 \| moderate	10.373 \| good	16.702 \| good	34.968 \| good	0.243 \| good	7.603 \| good	0.273 \| good
2026-08-13T18:00:00.000Z	54 \| moderate	11.319 \| good	17.597 \| good	34.508 \| good	0.233 \| good	5.093 \| good	0.215 \| good
2026-08-13T19:00:00.000Z	54 \| moderate	11.443 \| good	18.585 \| good	40.486 \| good	0.202 \| good	4.201 \| good	0.215 \| good
2026-08-13T20:00:00.000Z	54 \| moderate	11.422 \| good	17.82 \| good	44.871 \| good	0.512 \| good	2.895 \| good	0.207 \| good
2026-08-13T21:00:00.000Z	54 \| moderate	11.452 \| good	17.85 \| good	39.316 \| good	0.531 \| good	3.342 \| good	0.207 \| good
2026-08-13T22:00:00.000Z	54 \| moderate	11.476 \| good	17.025 \| good	39.683 \| good	0.56 \| good	3.33 \| good	0.215 \| good
2026-08-13T23:00:00.000Z	56 \| moderate	11.639 \| good	17.055 \| good	35.907 \| good	0.561 \| good	3.578 \| good	0.215 \| good
2026-08-14T00:00:00.000Z	56 \| moderate	11.785 \| good	17.812 \| good	38.536 \| good	0.237 \| good	6.046 \| good	0.207 \| good
2026-08-14T01:00:00.000Z	56 \| moderate	12.037 \| good	20.445 \| good	34.459 \| good	0.195 \| good	14.384 \| good	0.265 \| good
2026-08-14T02:00:00.000Z	56 \| moderate	12.202 \| fine	21.395 \| good	38.826 \| good	0.181 \| good	14.011 \| good	0.273 \| good
2026-08-14T03:00:00.000Z	56 \| moderate	12.448 \| fine	23.135 \| good	24.733 \| good	0.181 \| good	18.367 \| good	0.345 \| good
2026-08-14T04:00:00.000Z	58 \| moderate	12.671 \| fine	25.695 \| good	19.601 \| good	0.464 \| good	16.952 \| good	0.353 \| good
2026-08-14T05:00:00.000Z	58 \| moderate	12.725 \| fine	26.583 \| good	25.47 \| good	0.222 \| good	10.272 \| good	0.247 \| good
2026-08-14T06:00:00.000Z	58 \| moderate	12.731 \| fine	26.944 \| good	22.254 \| good	0.479 \| good	9.928 \| good	0.221 \| good
2026-08-14T07:00:00.000Z	58 \| moderate	12.668 \| fine	28.081 \| good	23.966 \| good	0.478 \| good	10.023 \| good	0.208 \| good
2026-08-14T08:00:00.000Z	56 \| moderate	11.731 \| good	26.586 \| good	21.239 \| good	0.275 \| good	10.976 \| good	0.181 \| good
2026-08-14T09:00:00.000Z	54 \| moderate	10.741 \| good	25.691 \| good	20.14 \| good	0.334 \| good	13.592 \| good	0.202 \| good
2026-08-14T10:00:00.000Z	52 \| moderate	10.012 \| good	24.834 \| good	20.516 \| good	0.326 \| good	13.27 \| good	0.181 \| good
2026-08-14T11:00:00.000Z	52 \| moderate	9.814 \| good	24.746 \| good	15.383 \| good	0.327 \| good	10.547 \| good	0.247 \| good
2026-08-14T12:00:00.000Z	49 \| good	9.417 \| good	25.611 \| good	16.16 \| good	0.13 \| good	8.041 \| good	0.188 \| good
2026-08-14T13:00:00.000Z	49 \| good	9.48 \| good	26.066 \| good	14.481 \| good	0.181 \| good	5.86 \| good	0.188 \| good
2026-08-14T14:00:00.000Z	44 \| good	7.533 \| good	17.562 \| good	17.878 \| good	0.29 \| good	4.193 \| good	0.181 \| good
2026-08-14T15:00:00.000Z	38 \| good	6.756 \| good	16.474 \| good	20.654 \| good	0.183 \| good	4.256 \| good	0.207 \| good
2026-08-14T16:00:00.000Z	38 \| good	6.815 \| good	16.702 \| good	25.212 \| good	0.526 \| good	4.239 \| good	0.213 \| good
2026-08-14T17:00:00.000Z	38 \| good	6.551 \| good	17.822 \| good	25.744 \| good	0.477 \| good	4.398 \| good	0.224 \| good
2026-08-14T18:00:00.000Z	27 \| good	5.105 \| good	22.117 \| good	24.868 \| good	0.135 \| good	0.427 \| good	0.172 \| good
2026-08-14T19:00:00.000Z	27 \| good	5.423 \| good	23.211 \| good	25.524 \| good	0.137 \| good	0.445 \| good	0.174 \| good
2026-08-14T20:00:00.000Z	33 \| good	6.422 \| good	28.63 \| good	23.937 \| good	0.143 \| good	0.498 \| good	0.176 \| good
2026-08-14T21:00:00.000Z	33 \| good	5.932 \| good	25.885 \| good	22.605 \| good	0.146 \| good	0.669 \| good	0.179 \| good
2026-08-14T22:00:00.000Z	33 \| good	5.516 \| good	23.638 \| good	23.028 \| good	0.14 \| good	1.435 \| good	0.194 \| good
2026-08-14T23:00:00.000Z	27 \| good	4.641 \| good	20.119 \| good	21.807 \| good	0.149 \| good	2.979 \| good	0.219 \| good
2026-08-15T00:00:00.000Z	27 \| good	4.56 \| good	20.062 \| good	19.283 \| good	0.187 \| good	6.426 \| good	0.255 \| good
2026-08-15T01:00:00.000Z	27 \| good	4.979 \| good	21.601 \| good	18.993 \| good	0.217 \| good	9.296 \| good	0.274 \| good
2026-08-15T02:00:00.000Z	27 \| good	5.014 \| good	21.629 \| good	17.961 \| good	0.225 \| good	10.334 \| good	0.276 \| good
2026-08-15T03:00:00.000Z	27 \| good	5.47 \| good	23.964 \| good	15.633 \| good	0.215 \| good	9.27 \| good	0.261 \| good
2026-08-15T04:00:00.000Z	33 \| good	5.889 \| good	25.787 \| good	13.052 \| good	0.194 \| good	7.28 \| good	0.239 \| good
2026-08-15T05:00:00.000Z	33 \| good	6.056 \| good	26.419 \| good	13.911 \| good	0.171 \| good	5.491 \| good	0.218 \| good
2026-08-15T06:00:00.000Z	38 \| good	6.635 \| good	29.466 \| good	14.197 \| good	0.155 \| good	4.504 \| good	0.203 \| good
2026-08-15T07:00:00.000Z	33 \| good	6.36 \| good	28.121 \| good	14.019 \| good	0.144 \| good	3.87 \| good	0.191 \| good
2026-08-15T08:00:00.000Z	27 \| good	5.421 \| good	23.3 \| good	12.757 \| good	0.142 \| good	3.482 \| good	0.183 \| good
2026-08-15T09:00:00.000Z	33 \| good	5.921 \| good	25.62 \| good	10.752 \| good	0.152 \| good	3.276 \| good	0.177 \| good
2026-08-15T10:00:00.000Z	33 \| good	5.761 \| good	24.972 \| good	11.461 \| good	0.17 \| good	3.23 \| good	0.173 \| good
2026-08-15T11:00:00.000Z	27 \| good	5.001 \| good	21.387 \| good	12.136 \| good	0.187 \| good	2.996 \| good	0.173 \| good
2026-08-15T12:00:00.000Z	22 \| good	3.622 \| good	15.946 \| good	15.644 \| good	0.2 \| good	2.251 \| good	0.176 \| good
2026-08-15T13:00:00.000Z	22 \| good	4.238 \| good	18.844 \| good	18.849 \| good	0.28 \| good	1.473 \| good	0.171 \| good
2026-08-15T14:00:00.000Z	22 \| good	4.299 \| good	18.967 \| good	21.291 \| good	0.343 \| good	0.947 \| good	0.164 \| good
2026-08-15T15:00:00.000Z	22 \| good	4.486 \| good	19.548 \| good	22.187 \| good	0.308 \| good	0.616 \| good	0.158 \| good
2026-08-15T16:00:00.000Z	27 \| good	5.183 \| good	22.395 \| good	21.934 \| good	0.254 \| good	0.465 \| good	0.154 \| good
2026-08-15T17:00:00.000Z	33 \| good	5.59 \| good	24.099 \| good	20.304 \| good	0.22 \| good	0.398 \| good	0.153 \| good
2026-08-15T18:00:00.000Z	27 \| good	4.652 \| good	20.306 \| good	20.411 \| good	0.193 \| good	0.379 \| good	0.153 \| good
2026-08-15T19:00:00.000Z	22 \| good	4.48 \| good	19.383 \| good	21.867 \| good	0.168 \| good	0.384 \| good	0.153 \| good
2026-08-15T20:00:00.000Z	27 \| good	4.886 \| good	21 \| good	24.9 \| good	0.146 \| good	0.42 \| good	0.153 \| good
2026-08-15T21:00:00.000Z	27 \| good	4.787 \| good	20.974 \| good	25.595 \| good	0.133 \| good	0.542 \| good	0.154 \| good
2026-08-15T22:00:00.000Z	27 \| good	4.74 \| good	20.621 \| good	24.802 \| good	0.129 \| good	0.952 \| good	0.161 \| good
2026-08-15T23:00:00.000Z	38 \| good	7.162 \| good	31.578 \| good	23.374 \| good	0.134 \| good	2.604 \| good	0.187 \| good
2026-08-16T00:00:00.000Z	33 \| good	5.845 \| good	25.468 \| good	18.764 \| good	0.175 \| good	6.171 \| good	0.223 \| good
2026-08-16T01:00:00.000Z	33 \| good	6.284 \| good	27.556 \| good	16.757 \| good	0.226 \| good	10.271 \| good	0.252 \| good
2026-08-16T02:00:00.000Z	33 \| good	5.865 \| good	25.688 \| good	16.025 \| good	0.269 \| good	13.619 \| good	0.277 \| good
2026-08-16T03:00:00.000Z	27 \| good	5.354 \| good	23.301 \| good	15.204 \| good	0.307 \| good	16.04 \| good	0.293 \| good
2026-08-16T04:00:00.000Z	33 \| good	5.771 \| good	25.017 \| good	13.689 \| good	0.329 \| good	16.119 \| good	0.295 \| good
2026-08-16T05:00:00.000Z	33 \| good	5.591 \| good	24.044 \| good	12.607 \| good	0.332 \| good	14.596 \| good	0.285 \| good
2026-08-16T06:00:00.000Z	27 \| good	5.399 \| good	23.426 \| good	12.217 \| good	0.34 \| good	12.682 \| good	0.265 \| good
2026-08-16T07:00:00.000Z	27 \| good	5.199 \| good	22.421 \| good	11.504 \| good	0.366 \| good	10.694 \| good	0.242 \| good
2026-08-16T08:00:00.000Z	27 \| good	5.323 \| good	23.301 \| good	10.641 \| good	0.419 \| good	9.405 \| good	0.223 \| good
2026-08-16T09:00:00.000Z	33 \| good	5.511 \| good	23.521 \| good	10.81 \| good	0.495 \| good	8.848 \| good	0.211 \| good
2026-08-16T10:00:00.000Z	27 \| good	5.147 \| good	22.182 \| good	10.143 \| good	0.574 \| good	8.397 \| good	0.203 \| good
2026-08-16T11:00:00.000Z	27 \| good	4.616 \| good	20.198 \| good	9.484 \| good	0.612 \| good	7.651 \| good	0.2 \| good
2026-08-16T12:00:00.000Z	33 \| good	5.774 \| good	24.981 \| good	13.953 \| good	0.598 \| good	5.353 \| good	0.195 \| good
2026-08-16T13:00:00.000Z	33 \| good	6.236 \| good	27.772 \| good	19.775 \| good	0.587 \| good	3.433 \| good	0.188 \| good
2026-08-16T14:00:00.000Z	33 \| good	5.917 \| good	25.847 \| good	24.092 \| good	0.545 \| good	2.038 \| good	0.184 \| good
2026-08-16T15:00:00.000Z	33 \| good	5.51 \| good	23.661 \| good	25.847 \| good	0.543 \| good	1.328 \| good	0.185 \| good
2026-08-16T16:00:00.000Z	28 \| good	5.274 \| good	22.783 \| good	30.292 \| good	0.538 \| good	1.137 \| good	0.185 \| good
2026-08-16T17:00:00.000Z	33 \| good	6.447 \| good	28.791 \| good	35.967 \| good	0.511 \| good	1.194 \| good	0.182 \| 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
Berlin, Connecticut	33 Good	6.05μg/m³ Good	15.04μg/m³ Good	27.49ppb Good	0.52ppb Good	5.03ppb Good	0.21ppm Good
Bethel, Connecticut	49 Good	8.66μg/m³ Good	18.82μg/m³ Good	27.86ppb Good	0.51ppb Good	3.61ppb Good	0.24ppm Good
Bloomfield, Connecticut	44 Good	7.57μg/m³ Good	15.38μg/m³ Good	25.10ppb Good	0.51ppb Good	6.99ppb Good	0.20ppm Good
Ansonia, Connecticut	33 Good	5.73μg/m³ Good	15.91μg/m³ Good	23.88ppb Good	0.53ppb Good	3.94ppb Good	0.24ppm Good
Avon, Connecticut	33 Good	6.50μg/m³ Good	25.90μg/m³ Good	26.07ppb Good	0.53ppb Good	5.33ppb Good	0.21ppm Good
Bridgeport, Connecticut	38 Good	7.49μg/m³ Good	15.09μg/m³ Good	27.37ppb Good	0.49ppb Good	3.69ppb Good	0.25ppm Good
Brookfield, Connecticut	49 Good	8.52μg/m³ Good	18.65μg/m³ Good	27.58ppb Good	0.51ppb Good	3.62ppb Good	0.24ppm Good
Canton, Connecticut	33 Good	6.02μg/m³ Good	14.80μg/m³ Good	23.58ppb Good	0.54ppb Good	4.29ppb Good	0.20ppm Good
Branford, Connecticut	33 Good	5.82μg/m³ Good	16.56μg/m³ Good	26.32ppb Good	0.50ppb Good	4.10ppb Good	0.21ppm Good
Bristol, Connecticut	38 Good	6.64μg/m³ Good	22.16μg/m³ Good	20.61ppb Good	0.51ppb Good	4.47ppb Good	0.21ppm Good
Cheshire, Connecticut	38 Good	6.55μg/m³ Good	12.19μg/m³ Good	24.75ppb Good	0.50ppb Good	4.43ppb Good	0.21ppm Good
Derby, Connecticut	33 Good	5.73μg/m³ Good	15.91μg/m³ Good	23.88ppb Good	0.53ppb Good	3.94ppb Good	0.24ppm Good
East Windsor, Connecticut	38 Good	6.89μg/m³ Good	22.41μg/m³ Good	25.05ppb Good	0.51ppb Good	4.12ppb Good	0.22ppm Good
Cromwell, Connecticut	38 Good	6.76μg/m³ Good	20.97μg/m³ Good	25.94ppb Good	0.37ppb Good	4.90ppb Good	0.21ppm Good
Danbury, Connecticut	49 Good	8.79μg/m³ Good	19.00μg/m³ Good	28.00ppb Good	0.51ppb Good	3.65ppb Good	0.24ppm Good
East Hartford, Connecticut	38 Good	7.21μg/m³ Good	14.05μg/m³ Good	24.48ppb Good	0.51ppb Good	4.52ppb Good	0.20ppm Good
Coventry, Connecticut	33 Good	5.82μg/m³ Good	16.54μg/m³ Good	26.49ppb Good	0.32ppb Good	3.82ppb Good	0.22ppm Good
Darien, Connecticut	38 Good	7.01μg/m³ Good	16.39μg/m³ Good	29.48ppb Good	0.56ppb Good	3.10ppb Good	0.26ppm Good
Shelton, Connecticut	33 Good	5.73μg/m³ Good	15.91μg/m³ Good	23.88ppb Good	0.53ppb Good	3.94ppb Good	0.24ppm Good
Colchester, Connecticut	27 Good	5.45μg/m³ Good	16.35μg/m³ Good	25.66ppb Good	0.33ppb Good	4.07ppb Good	0.22ppm Good
East Hampton, Connecticut	33 Good	6.08μg/m³ Good	15.05μg/m³ Good	28.70ppb Good	0.34ppb Good	4.50ppb Good	0.21ppm Good
East Lyme, Connecticut	33 Good	5.84μg/m³ Good	14.46μg/m³ Good	28.70ppb Good	0.33ppb Good	5.77ppb Good	0.22ppm Good
East Haven, Connecticut	33 Good	5.82μg/m³ Good	16.56μg/m³ Good	26.32ppb Good	0.50ppb Good	4.10ppb Good	0.21ppm Good
Clinton, Connecticut	38 Good	6.71μg/m³ Good	16.97μg/m³ Good	31.80ppb Good	0.34ppb Good	4.08ppb Good	0.22ppm Good
Fairfield, Connecticut	38 Good	7.32μg/m³ Good	16.39μg/m³ Good	27.08ppb Good	0.50ppb Good	3.30ppb Good	0.25ppm Good
Enfield, Connecticut	38 Good	6.51μg/m³ Good	21.81μg/m³ Good	27.34ppb Good	0.52ppb Good	3.44ppb Good	0.22ppm Good
Ellington, Connecticut	38 Good	6.71μg/m³ Good	21.08μg/m³ Good	24.31ppb Good	0.51ppb Good	3.63ppb Good	0.22ppm Good
Farmington, Connecticut	33 Good	6.01μg/m³ Good	24.35μg/m³ Good	24.15ppb Good	0.50ppb Good	4.84ppb Good	0.21ppm Good
Hartford, Connecticut	44 Good	7.95μg/m³ Good	14.94μg/m³ Good	25.71ppb Good	0.52ppb Good	9.29ppb Good	0.20ppm Good
Greenwich, Connecticut	38 Good	7.06μg/m³ Good	28.70μg/m³ Good	34.26ppb Good	0.61ppb Good	6.20ppb Good	0.26ppm Good
New London, Connecticut	33 Good	6.29μg/m³ Good	13.00μg/m³ Good	27.98ppb Good	0.33ppb Good	5.75ppb Good	0.23ppm Good
Griswold, Connecticut	22 Good	4.44μg/m³ Good	17.00μg/m³ Good	23.54ppb Good	0.32ppb Good	5.56ppb Good	0.21ppm Good
Guilford, Connecticut	38 Good	6.57μg/m³ Good	15.81μg/m³ Good	29.07ppb Good	0.49ppb Good	4.13ppb Good	0.23ppm Good
Hamden, Connecticut	33 Good	5.74μg/m³ Good	15.94μg/m³ Good	24.06ppb Good	0.50ppb Good	4.25ppb Good	0.21ppm Good
Groton, Connecticut	33 Good	6.29μg/m³ Good	13.00μg/m³ Good	27.98ppb Good	0.33ppb Good	5.75ppb Good	0.23ppm Good
Glastonbury, Connecticut	38 Good	7.12μg/m³ Good	16.67μg/m³ Good	25.33ppb Good	0.46ppb Good	5.11ppb Good	0.21ppm Good
Granby, Connecticut	33 Good	6.20μg/m³ Good	24.79μg/m³ Good	21.66ppb Good	0.53ppb Good	3.73ppb Good	0.22ppm Good
Killingly, Connecticut	27 Good	4.55μg/m³ Good	17.52μg/m³ Good	22.46ppb Good	0.30ppb Good	4.15ppb Good	0.22ppm Good
Ledyard, Connecticut	27 Good	5.39μg/m³ Good	12.11μg/m³ Good	26.44ppb Good	0.32ppb Good	5.49ppb Good	0.23ppm Good
Manchester, Connecticut	38 Good	7.42μg/m³ Good	28.36μg/m³ Good	25.44ppb Good	0.51ppb Good	4.47ppb Good	0.21ppm Good
Mansfield, Connecticut	33 Good	5.75μg/m³ Good	16.66μg/m³ Good	28.87ppb Good	0.32ppb Good	3.61ppb Good	0.22ppm Good
Meriden, Connecticut	38 Good	6.57μg/m³ Good	16.90μg/m³ Good	23.47ppb Good	0.48ppb Good	4.65ppb Good	0.22ppm Good
Middletown, Connecticut	38 Good	6.66μg/m³ Good	22.03μg/m³ Good	26.01ppb Good	0.35ppb Good	4.70ppb Good	0.21ppm Good
Madison, Connecticut	38 Good	6.73μg/m³ Good	17.16μg/m³ Good	31.47ppb Good	0.35ppb Good	4.12ppb Good	0.22ppm Good
Milford, Connecticut	38 Good	7.14μg/m³ Good	18.30μg/m³ Good	29.02ppb Good	0.53ppb Good	3.55ppb Good	0.25ppm Good
New Britain, Connecticut	33 Good	6.05μg/m³ Good	15.04μg/m³ Good	27.49ppb Good	0.52ppb Good	5.03ppb Good	0.21ppm Good
North Branford, Connecticut	33 Good	5.86μg/m³ Good	15.19μg/m³ Good	28.00ppb Good	0.49ppb Good	4.18ppb Good	0.22ppm Good
Norwich, Connecticut	27 Good	4.82μg/m³ Good	16.20μg/m³ Good	22.77ppb Good	0.32ppb Good	5.81ppb Good	0.23ppm Good
Naugatuck, Connecticut	38 Good	6.84μg/m³ Good	16.92μg/m³ Good	25.18ppb Good	0.53ppb Good	4.28ppb Good	0.21ppm Good
New Haven, Connecticut	33 Good	5.67μg/m³ Good	15.95μg/m³ Good	24.14ppb Good	0.52ppb Good	4.02ppb Good	0.24ppm Good

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

0.14ppm

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.

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

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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 07:00:00 on 2026-08-14.

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 04:00:00 on 2026-08-14.

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 6.551 μg/m³.

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

The PM₁₀ concentration in Connecticut, USA is 17.822 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 0.224 ppm.

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

Currently, Connecticut, USA has a sulfur dioxide (SO₂) concentration of 0.477 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 25.744 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 4.398 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-12T18:00:00.000Z	33 \| good	5.79 \| good	22.06 \| good	29.458 \| good	0.476 \| good	2.274 \| good	0.173 \| good
2026-08-12T19:00:00.000Z	33 \| good	6.115 \| good	33.997 \| good	29.085 \| good	0.497 \| good	2.167 \| good	0.152 \| good
2026-08-12T20:00:00.000Z	33 \| good	5.77 \| good	23.745 \| good	31.931 \| good	0.513 \| good	2.148 \| good	0.152 \| good
2026-08-12T21:00:00.000Z	29 \| good	5.339 \| good	16.884 \| good	30.591 \| good	0.499 \| good	3.11 \| good	0.152 \| good
2026-08-12T22:00:00.000Z	27 \| good	5.179 \| good	13.509 \| good	29.246 \| good	0.179 \| good	3.327 \| good	0.159 \| good
2026-08-12T23:00:00.000Z	30 \| good	5.288 \| good	11.875 \| good	32.412 \| good	0.406 \| good	3.537 \| good	0.188 \| good
2026-08-13T00:00:00.000Z	33 \| good	6.001 \| good	26.482 \| good	27.974 \| good	0.354 \| good	7.1 \| good	0.224 \| good
2026-08-13T01:00:00.000Z	33 \| good	6.384 \| good	22.313 \| good	25.274 \| good	0.234 \| good	11.273 \| good	0.275 \| good
2026-08-13T02:00:00.000Z	39 \| good	6.666 \| good	19.013 \| good	41.525 \| good	0.211 \| good	12.214 \| good	0.276 \| good
2026-08-13T03:00:00.000Z	38 \| good	6.689 \| good	19 \| good	27.671 \| good	0.181 \| good	9.869 \| good	0.294 \| good
2026-08-13T04:00:00.000Z	38 \| good	6.735 \| good	19.442 \| good	34.654 \| good	0.214 \| good	11.855 \| good	0.286 \| good
2026-08-13T05:00:00.000Z	38 \| good	6.975 \| good	18.193 \| good	37.085 \| good	0.235 \| good	18.069 \| good	0.251 \| good
2026-08-13T06:00:00.000Z	38 \| good	6.908 \| good	15.602 \| good	32.354 \| good	0.249 \| good	7.553 \| good	0.251 \| good
2026-08-13T07:00:00.000Z	38 \| good	6.937 \| good	15.82 \| good	30.816 \| good	0.359 \| good	7.791 \| good	0.223 \| good
2026-08-13T08:00:00.000Z	38 \| good	6.906 \| good	13.745 \| good	26.09 \| good	0.538 \| good	7.35 \| good	0.214 \| good
2026-08-13T09:00:00.000Z	38 \| good	6.953 \| good	14.262 \| good	25.889 \| good	0.55 \| good	10.047 \| good	0.223 \| good
2026-08-13T10:00:00.000Z	38 \| good	6.829 \| good	11.937 \| good	25.386 \| good	0.581 \| good	10.179 \| good	0.273 \| good
2026-08-13T11:00:00.000Z	38 \| good	6.844 \| good	11.962 \| good	24.311 \| good	0.58 \| good	9.168 \| good	0.222 \| good
2026-08-13T12:00:00.000Z	38 \| good	6.88 \| good	12.258 \| good	27.746 \| good	0.504 \| good	9.522 \| good	0.233 \| good
2026-08-13T13:00:00.000Z	38 \| good	7.024 \| good	13.164 \| good	30.177 \| good	0.49 \| good	9.547 \| good	0.247 \| good
2026-08-13T14:00:00.000Z	38 \| good	7.394 \| good	13.01 \| good	31.345 \| good	0.53 \| good	4.247 \| good	0.215 \| good
2026-08-13T15:00:00.000Z	44 \| good	8.167 \| good	13.993 \| good	29.685 \| good	0.488 \| good	2.979 \| good	0.215 \| good
2026-08-13T16:00:00.000Z	49 \| good	9.33 \| good	16.615 \| good	34.385 \| good	0.564 \| good	4.703 \| good	0.273 \| good
2026-08-13T17:00:00.000Z	52 \| moderate	10.373 \| good	16.702 \| good	34.968 \| good	0.243 \| good	7.603 \| good	0.273 \| good
2026-08-13T18:00:00.000Z	54 \| moderate	11.319 \| good	17.597 \| good	34.508 \| good	0.233 \| good	5.093 \| good	0.215 \| good
2026-08-13T19:00:00.000Z	54 \| moderate	11.443 \| good	18.585 \| good	40.486 \| good	0.202 \| good	4.201 \| good	0.215 \| good
2026-08-13T20:00:00.000Z	54 \| moderate	11.422 \| good	17.82 \| good	44.871 \| good	0.512 \| good	2.895 \| good	0.207 \| good
2026-08-13T21:00:00.000Z	54 \| moderate	11.452 \| good	17.85 \| good	39.316 \| good	0.531 \| good	3.342 \| good	0.207 \| good
2026-08-13T22:00:00.000Z	54 \| moderate	11.476 \| good	17.025 \| good	39.683 \| good	0.56 \| good	3.33 \| good	0.215 \| good
2026-08-13T23:00:00.000Z	56 \| moderate	11.639 \| good	17.055 \| good	35.907 \| good	0.561 \| good	3.578 \| good	0.215 \| good
2026-08-14T00:00:00.000Z	56 \| moderate	11.785 \| good	17.812 \| good	38.536 \| good	0.237 \| good	6.046 \| good	0.207 \| good
2026-08-14T01:00:00.000Z	56 \| moderate	12.037 \| good	20.445 \| good	34.459 \| good	0.195 \| good	14.384 \| good	0.265 \| good
2026-08-14T02:00:00.000Z	56 \| moderate	12.202 \| fine	21.395 \| good	38.826 \| good	0.181 \| good	14.011 \| good	0.273 \| good
2026-08-14T03:00:00.000Z	56 \| moderate	12.448 \| fine	23.135 \| good	24.733 \| good	0.181 \| good	18.367 \| good	0.345 \| good
2026-08-14T04:00:00.000Z	58 \| moderate	12.671 \| fine	25.695 \| good	19.601 \| good	0.464 \| good	16.952 \| good	0.353 \| good
2026-08-14T05:00:00.000Z	58 \| moderate	12.725 \| fine	26.583 \| good	25.47 \| good	0.222 \| good	10.272 \| good	0.247 \| good
2026-08-14T06:00:00.000Z	58 \| moderate	12.731 \| fine	26.944 \| good	22.254 \| good	0.479 \| good	9.928 \| good	0.221 \| good
2026-08-14T07:00:00.000Z	58 \| moderate	12.668 \| fine	28.081 \| good	23.966 \| good	0.478 \| good	10.023 \| good	0.208 \| good
2026-08-14T08:00:00.000Z	56 \| moderate	11.731 \| good	26.586 \| good	21.239 \| good	0.275 \| good	10.976 \| good	0.181 \| good
2026-08-14T09:00:00.000Z	54 \| moderate	10.741 \| good	25.691 \| good	20.14 \| good	0.334 \| good	13.592 \| good	0.202 \| good
2026-08-14T10:00:00.000Z	52 \| moderate	10.012 \| good	24.834 \| good	20.516 \| good	0.326 \| good	13.27 \| good	0.181 \| good
2026-08-14T11:00:00.000Z	52 \| moderate	9.814 \| good	24.746 \| good	15.383 \| good	0.327 \| good	10.547 \| good	0.247 \| good
2026-08-14T12:00:00.000Z	49 \| good	9.417 \| good	25.611 \| good	16.16 \| good	0.13 \| good	8.041 \| good	0.188 \| good
2026-08-14T13:00:00.000Z	49 \| good	9.48 \| good	26.066 \| good	14.481 \| good	0.181 \| good	5.86 \| good	0.188 \| good
2026-08-14T14:00:00.000Z	44 \| good	7.533 \| good	17.562 \| good	17.878 \| good	0.29 \| good	4.193 \| good	0.181 \| good
2026-08-14T15:00:00.000Z	38 \| good	6.756 \| good	16.474 \| good	20.654 \| good	0.183 \| good	4.256 \| good	0.207 \| good
2026-08-14T16:00:00.000Z	38 \| good	6.815 \| good	16.702 \| good	25.212 \| good	0.526 \| good	4.239 \| good	0.213 \| good
2026-08-14T17:00:00.000Z	38 \| good	6.551 \| good	17.822 \| good	25.744 \| good	0.477 \| good	4.398 \| good	0.224 \| good
2026-08-14T18:00:00.000Z	27 \| good	5.105 \| good	22.117 \| good	24.868 \| good	0.135 \| good	0.427 \| good	0.172 \| good
2026-08-14T19:00:00.000Z	27 \| good	5.423 \| good	23.211 \| good	25.524 \| good	0.137 \| good	0.445 \| good	0.174 \| good
2026-08-14T20:00:00.000Z	33 \| good	6.422 \| good	28.63 \| good	23.937 \| good	0.143 \| good	0.498 \| good	0.176 \| good
2026-08-14T21:00:00.000Z	33 \| good	5.932 \| good	25.885 \| good	22.605 \| good	0.146 \| good	0.669 \| good	0.179 \| good
2026-08-14T22:00:00.000Z	33 \| good	5.516 \| good	23.638 \| good	23.028 \| good	0.14 \| good	1.435 \| good	0.194 \| good
2026-08-14T23:00:00.000Z	27 \| good	4.641 \| good	20.119 \| good	21.807 \| good	0.149 \| good	2.979 \| good	0.219 \| good
2026-08-15T00:00:00.000Z	27 \| good	4.56 \| good	20.062 \| good	19.283 \| good	0.187 \| good	6.426 \| good	0.255 \| good
2026-08-15T01:00:00.000Z	27 \| good	4.979 \| good	21.601 \| good	18.993 \| good	0.217 \| good	9.296 \| good	0.274 \| good
2026-08-15T02:00:00.000Z	27 \| good	5.014 \| good	21.629 \| good	17.961 \| good	0.225 \| good	10.334 \| good	0.276 \| good
2026-08-15T03:00:00.000Z	27 \| good	5.47 \| good	23.964 \| good	15.633 \| good	0.215 \| good	9.27 \| good	0.261 \| good
2026-08-15T04:00:00.000Z	33 \| good	5.889 \| good	25.787 \| good	13.052 \| good	0.194 \| good	7.28 \| good	0.239 \| good
2026-08-15T05:00:00.000Z	33 \| good	6.056 \| good	26.419 \| good	13.911 \| good	0.171 \| good	5.491 \| good	0.218 \| good
2026-08-15T06:00:00.000Z	38 \| good	6.635 \| good	29.466 \| good	14.197 \| good	0.155 \| good	4.504 \| good	0.203 \| good
2026-08-15T07:00:00.000Z	33 \| good	6.36 \| good	28.121 \| good	14.019 \| good	0.144 \| good	3.87 \| good	0.191 \| good
2026-08-15T08:00:00.000Z	27 \| good	5.421 \| good	23.3 \| good	12.757 \| good	0.142 \| good	3.482 \| good	0.183 \| good
2026-08-15T09:00:00.000Z	33 \| good	5.921 \| good	25.62 \| good	10.752 \| good	0.152 \| good	3.276 \| good	0.177 \| good
2026-08-15T10:00:00.000Z	33 \| good	5.761 \| good	24.972 \| good	11.461 \| good	0.17 \| good	3.23 \| good	0.173 \| good
2026-08-15T11:00:00.000Z	27 \| good	5.001 \| good	21.387 \| good	12.136 \| good	0.187 \| good	2.996 \| good	0.173 \| good
2026-08-15T12:00:00.000Z	22 \| good	3.622 \| good	15.946 \| good	15.644 \| good	0.2 \| good	2.251 \| good	0.176 \| good
2026-08-15T13:00:00.000Z	22 \| good	4.238 \| good	18.844 \| good	18.849 \| good	0.28 \| good	1.473 \| good	0.171 \| good
2026-08-15T14:00:00.000Z	22 \| good	4.299 \| good	18.967 \| good	21.291 \| good	0.343 \| good	0.947 \| good	0.164 \| good
2026-08-15T15:00:00.000Z	22 \| good	4.486 \| good	19.548 \| good	22.187 \| good	0.308 \| good	0.616 \| good	0.158 \| good
2026-08-15T16:00:00.000Z	27 \| good	5.183 \| good	22.395 \| good	21.934 \| good	0.254 \| good	0.465 \| good	0.154 \| good
2026-08-15T17:00:00.000Z	33 \| good	5.59 \| good	24.099 \| good	20.304 \| good	0.22 \| good	0.398 \| good	0.153 \| good
2026-08-15T18:00:00.000Z	27 \| good	4.652 \| good	20.306 \| good	20.411 \| good	0.193 \| good	0.379 \| good	0.153 \| good
2026-08-15T19:00:00.000Z	22 \| good	4.48 \| good	19.383 \| good	21.867 \| good	0.168 \| good	0.384 \| good	0.153 \| good
2026-08-15T20:00:00.000Z	27 \| good	4.886 \| good	21 \| good	24.9 \| good	0.146 \| good	0.42 \| good	0.153 \| good
2026-08-15T21:00:00.000Z	27 \| good	4.787 \| good	20.974 \| good	25.595 \| good	0.133 \| good	0.542 \| good	0.154 \| good
2026-08-15T22:00:00.000Z	27 \| good	4.74 \| good	20.621 \| good	24.802 \| good	0.129 \| good	0.952 \| good	0.161 \| good
2026-08-15T23:00:00.000Z	38 \| good	7.162 \| good	31.578 \| good	23.374 \| good	0.134 \| good	2.604 \| good	0.187 \| good
2026-08-16T00:00:00.000Z	33 \| good	5.845 \| good	25.468 \| good	18.764 \| good	0.175 \| good	6.171 \| good	0.223 \| good
2026-08-16T01:00:00.000Z	33 \| good	6.284 \| good	27.556 \| good	16.757 \| good	0.226 \| good	10.271 \| good	0.252 \| good
2026-08-16T02:00:00.000Z	33 \| good	5.865 \| good	25.688 \| good	16.025 \| good	0.269 \| good	13.619 \| good	0.277 \| good
2026-08-16T03:00:00.000Z	27 \| good	5.354 \| good	23.301 \| good	15.204 \| good	0.307 \| good	16.04 \| good	0.293 \| good
2026-08-16T04:00:00.000Z	33 \| good	5.771 \| good	25.017 \| good	13.689 \| good	0.329 \| good	16.119 \| good	0.295 \| good
2026-08-16T05:00:00.000Z	33 \| good	5.591 \| good	24.044 \| good	12.607 \| good	0.332 \| good	14.596 \| good	0.285 \| good
2026-08-16T06:00:00.000Z	27 \| good	5.399 \| good	23.426 \| good	12.217 \| good	0.34 \| good	12.682 \| good	0.265 \| good
2026-08-16T07:00:00.000Z	27 \| good	5.199 \| good	22.421 \| good	11.504 \| good	0.366 \| good	10.694 \| good	0.242 \| good
2026-08-16T08:00:00.000Z	27 \| good	5.323 \| good	23.301 \| good	10.641 \| good	0.419 \| good	9.405 \| good	0.223 \| good
2026-08-16T09:00:00.000Z	33 \| good	5.511 \| good	23.521 \| good	10.81 \| good	0.495 \| good	8.848 \| good	0.211 \| good
2026-08-16T10:00:00.000Z	27 \| good	5.147 \| good	22.182 \| good	10.143 \| good	0.574 \| good	8.397 \| good	0.203 \| good
2026-08-16T11:00:00.000Z	27 \| good	4.616 \| good	20.198 \| good	9.484 \| good	0.612 \| good	7.651 \| good	0.2 \| good
2026-08-16T12:00:00.000Z	33 \| good	5.774 \| good	24.981 \| good	13.953 \| good	0.598 \| good	5.353 \| good	0.195 \| good
2026-08-16T13:00:00.000Z	33 \| good	6.236 \| good	27.772 \| good	19.775 \| good	0.587 \| good	3.433 \| good	0.188 \| good
2026-08-16T14:00:00.000Z	33 \| good	5.917 \| good	25.847 \| good	24.092 \| good	0.545 \| good	2.038 \| good	0.184 \| good
2026-08-16T15:00:00.000Z	33 \| good	5.51 \| good	23.661 \| good	25.847 \| good	0.543 \| good	1.328 \| good	0.185 \| good
2026-08-16T16:00:00.000Z	28 \| good	5.274 \| good	22.783 \| good	30.292 \| good	0.538 \| good	1.137 \| good	0.185 \| good
2026-08-16T17:00:00.000Z	33 \| good	6.447 \| good	28.791 \| good	35.967 \| good	0.511 \| good	1.194 \| good	0.182 \| good

Live air quality index in Connecticut, USA today

Major air pollutants in Connecticut, USA

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Connecticut, USA air quality forecast and history

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

Air quality in nearby states

New York, USA

Rhode Island, USA

Massachusetts, USA

New Jersey, USA

New Hampshire, USA

Vermont, USA

How accurate is Connecticut, USA air quality data?

Air quality levels in US

Frequently asked questions

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

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

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

What is the AQI in Connecticut, USA right now?

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

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

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

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

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

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

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

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

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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

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

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

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

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