What are the current PM10 levels at Colchester, Connecticut?

The current PM10 levels in Colchester, Connecticut are 45.759 μg/m3.

What are the current sulfur dioxide (SO2) levels at Colchester, Connecticut?

The current sulfur dioxide (SO2) levels in Colchester, Connecticut are 0.296 ppb.

What are the current ozone (O3) levels at Colchester, Connecticut?

The current ozone (O3) levels at Colchester, Connecticut is 19.639 ppm.

What are the current nitrogen dioxide (NO2) levels at Colchester, Connecticut?

The current nitrogen dioxide (NO2) levels at Colchester, Connecticut is 17.835 ppb.

Real-time air quality index in Colchester, Connecticut today

Q: What are the current PM2.5 levels in Colchester, Connecticut?

The measured PM2.5 levels in Colchester, Connecticut at present are 13.042 μg/m3.

Stay updated with real-time air quality in Colchester, 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

Colchester, Connecticut

Last updated: ... (Local time)

Common air pollutants in Colchester, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

13.04 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

45.76 μg/m³

155

255

425

605+

Ozone (O₃)

19.64 ppb

201

201+

Sulfur Dioxide (SO₂)

0.30 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

17.84 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.27 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Colchester, Connecticut

Get Live Pollen Counts

Colchester, Connecticut

Scroll To Air Quality Map

Track live Colchester, Connecticut air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T04:00:00.000Z	25 \| good	3.8 \| good	11.164 \| good	26.978 \| good	0.222 \| good	11.538 \| good	0.2 \| good
2025-12-27T05:00:00.000Z	28 \| good	3.92 \| good	13.159 \| good	30.003 \| good	0.22 \| good	11.277 \| good	0.223 \| good
2025-12-27T06:00:00.000Z	26 \| good	3.759 \| good	8.72 \| good	28.325 \| good	0.205 \| good	9.855 \| good	0.223 \| good
2025-12-27T07:00:00.000Z	24 \| good	3.978 \| good	15.585 \| good	25.931 \| good	0.206 \| good	9.603 \| good	0.2 \| good
2025-12-27T08:00:00.000Z	27 \| good	4.8 \| good	13.748 \| good	27.072 \| good	0.188 \| good	8.15 \| good	0.2 \| good
2025-12-27T09:00:00.000Z	27 \| good	4.218 \| good	8.836 \| good	28.905 \| good	0.243 \| good	7.873 \| good	0.164 \| good
2025-12-27T10:00:00.000Z	24 \| good	3.834 \| good	17.023 \| good	25.501 \| good	0.24 \| good	9.52 \| good	0.165 \| good
2025-12-27T11:00:00.000Z	22 \| good	4.232 \| good	13.851 \| good	23.231 \| good	0.221 \| good	9.105 \| good	0.151 \| good
2025-12-27T12:00:00.000Z	26 \| good	3.425 \| good	14.872 \| good	28.015 \| good	0.164 \| good	9.241 \| good	0.151 \| good
2025-12-27T13:00:00.000Z	26 \| good	3.95 \| good	12.808 \| good	28.288 \| good	0.182 \| good	8.025 \| good	0.15 \| good
2025-12-27T14:00:00.000Z	27 \| good	3.665 \| good	13.04 \| good	28.918 \| good	0.209 \| good	8.504 \| good	0.216 \| good
2025-12-27T15:00:00.000Z	27 \| good	3.611 \| good	10.511 \| good	29.023 \| good	0.193 \| good	7.522 \| good	0.216 \| good
2025-12-27T16:00:00.000Z	28 \| good	3.227 \| good	8.812 \| good	29.939 \| good	0.177 \| good	7.401 \| good	0.237 \| good
2025-12-27T17:00:00.000Z	31 \| good	3.389 \| good	10.978 \| good	32.94 \| good	0.177 \| good	7.011 \| good	0.251 \| good
2025-12-27T18:00:00.000Z	31 \| good	3.479 \| good	4.801 \| good	32.78 \| good	0.194 \| good	7.095 \| good	0.201 \| good
2025-12-27T19:00:00.000Z	31 \| good	3.284 \| good	6.443 \| good	32.898 \| good	0.194 \| good	5.952 \| good	0.201 \| good
2025-12-27T20:00:00.000Z	31 \| good	3.488 \| good	5.993 \| good	33.109 \| good	0.194 \| good	6.761 \| good	0.192 \| good
2025-12-27T21:00:00.000Z	32 \| good	4 \| good	4.793 \| good	34.565 \| good	0.194 \| good	8.495 \| good	0.22 \| good
2025-12-27T22:00:00.000Z	28 \| good	4.243 \| good	22.332 \| good	29.583 \| good	0.194 \| good	14.524 \| good	0.293 \| good
2025-12-27T23:00:00.000Z	29 \| good	4.631 \| good	14.66 \| good	31.402 \| good	0.264 \| good	16.948 \| good	0.364 \| good
2025-12-28T00:00:00.000Z	33 \| good	5.831 \| good	13.656 \| good	27.777 \| good	0.275 \| good	23.491 \| good	0.477 \| good
2025-12-28T01:00:00.000Z	38 \| good	6.775 \| good	16.06 \| good	23.2 \| good	0.423 \| good	20.935 \| good	0.622 \| good
2025-12-28T02:00:00.000Z	54 \| moderate	11.486 \| good	33.942 \| good	19.964 \| good	0.474 \| good	22.184 \| good	0.646 \| good
2025-12-28T03:00:00.000Z	58 \| moderate	12.666 \| fine	56.861 \| fine	12.238 \| good	1.269 \| good	17.829 \| good	0.291 \| good
2025-12-28T04:00:00.000Z	60 \| moderate	14.348 \| fine	23.047 \| good	13.812 \| good	0.528 \| good	17.633 \| good	0.591 \| good
2025-12-28T05:00:00.000Z	67 \| moderate	18.42 \| fine	28.818 \| good	16.269 \| good	0.321 \| good	19.832 \| good	0.582 \| good
2025-12-28T06:00:00.000Z	58 \| moderate	13.146 \| fine	32.363 \| good	8.597 \| good	0.549 \| good	21.968 \| good	0.414 \| good
2025-12-28T07:00:00.000Z	44 \| good	8.071 \| good	39.081 \| good	9.781 \| good	0.506 \| good	18.266 \| good	0.455 \| good
2025-12-28T08:00:00.000Z	44 \| good	7.891 \| good	46.5 \| good	14.946 \| good	0.33 \| good	11.029 \| good	0.382 \| good
2025-12-28T09:00:00.000Z	60 \| moderate	13.799 \| fine	30.664 \| good	5.899 \| good	0.546 \| good	11.318 \| good	0.468 \| good
2025-12-28T10:00:00.000Z	69 \| moderate	18.683 \| fine	35.289 \| good	8.032 \| good	0.544 \| good	12.458 \| good	0.551 \| good
2025-12-28T11:00:00.000Z	60 \| moderate	14.223 \| fine	28.85 \| good	10.438 \| good	0.389 \| good	10.359 \| good	0.462 \| good
2025-12-28T12:00:00.000Z	79 \| moderate	23.549 \| fine	43.455 \| good	9.064 \| good	0.418 \| good	28.9 \| good	0.483 \| good
2025-12-28T13:00:00.000Z	62 \| moderate	14.632 \| fine	23.93 \| good	8.193 \| good	0.418 \| good	16.851 \| good	0.455 \| good
2025-12-28T14:00:00.000Z	60 \| moderate	13.732 \| fine	62.596 \| fine	21.135 \| good	0.482 \| good	21.052 \| good	0.642 \| good
2025-12-28T15:00:00.000Z	54 \| moderate	11.032 \| good	26.738 \| good	12.39 \| good	0.294 \| good	17.8 \| good	0.385 \| good
2025-12-28T16:00:00.000Z	44 \| good	8.281 \| good	22.3 \| good	22.593 \| good	0.287 \| good	17.483 \| good	0.313 \| good
2025-12-28T17:00:00.000Z	49 \| good	8.677 \| good	33.705 \| good	28.305 \| good	0.271 \| good	14.645 \| good	0.25 \| good
2025-12-28T18:00:00.000Z	49 \| good	9.085 \| good	38.408 \| good	29.959 \| good	0.345 \| good	14.027 \| good	0.236 \| good
2025-12-28T19:00:00.000Z	38 \| good	6.796 \| good	20.437 \| good	28.692 \| good	0.318 \| good	17.159 \| good	0.307 \| good
2025-12-28T20:00:00.000Z	40 \| good	6.843 \| good	43.468 \| good	32.299 \| good	0.285 \| good	19.565 \| good	0.343 \| good
2025-12-28T21:00:00.000Z	44 \| good	7.51 \| good	39.801 \| good	30.422 \| good	0.298 \| good	22.759 \| good	0.348 \| good
2025-12-28T22:00:00.000Z	58 \| moderate	12.789 \| fine	46.302 \| good	22.034 \| good	0.27 \| good	27.939 \| good	0.47 \| good
2025-12-28T23:00:00.000Z	66 \| moderate	14.498 \| fine	85.351 \| fine	8.592 \| good	0.24 \| good	26.028 \| good	0.476 \| good
2025-12-29T00:00:00.000Z	56 \| moderate	12.418 \| fine	23.54 \| good	8.151 \| good	0.333 \| good	31.108 \| good	0.386 \| good
2025-12-29T01:00:00.000Z	56 \| moderate	12.381 \| fine	39.871 \| good	17.288 \| good	0.264 \| good	23.982 \| good	0.286 \| good
2025-12-29T02:00:00.000Z	58 \| moderate	13.042 \| fine	45.759 \| good	19.639 \| good	0.296 \| good	17.835 \| good	0.272 \| good
2025-12-29T03:00:00.000Z	58 \| moderate	13.042 \| fine	45.759 \| good	19.639 \| good	0.296 \| good	17.835 \| good	0.272 \| good
2025-12-29T04:00:00.000Z	44 \| good	7.655 \| good	33.571 \| good	27.213 \| good	1.355 \| good	18.189 \| good	0.215 \| good
2025-12-29T05:00:00.000Z	33 \| good	5.966 \| good	26.755 \| good	31.623 \| good	0.843 \| good	11.342 \| good	0.184 \| good
2025-12-29T06:00:00.000Z	32 \| good	4.106 \| good	18.148 \| good	35.288 \| good	0.331 \| good	4.494 \| good	0.154 \| good
2025-12-29T07:00:00.000Z	33 \| good	3.194 \| good	14 \| good	35.535 \| good	0.314 \| good	3.325 \| good	0.146 \| good
2025-12-29T08:00:00.000Z	32 \| good	2.966 \| good	12.093 \| good	35.26 \| good	0.296 \| good	2.156 \| good	0.137 \| good
2025-12-29T09:00:00.000Z	31 \| good	2.859 \| good	11.745 \| good	33.159 \| good	0.279 \| good	0.987 \| good	0.129 \| good
2025-12-29T10:00:00.000Z	31 \| good	2.717 \| good	10.972 \| good	33.059 \| good	0.441 \| good	2.128 \| good	0.137 \| good
2025-12-29T11:00:00.000Z	31 \| good	2.42 \| good	9.851 \| good	32.715 \| good	0.603 \| good	3.269 \| good	0.146 \| good
2025-12-29T12:00:00.000Z	30 \| good	2.522 \| good	10.233 \| good	31.834 \| good	0.765 \| good	4.41 \| good	0.155 \| good
2025-12-29T13:00:00.000Z	30 \| good	3.151 \| good	13.353 \| good	32.284 \| good	0.859 \| good	5.315 \| good	0.164 \| good
2025-12-29T14:00:00.000Z	29 \| good	4.25 \| good	18.685 \| good	30.539 \| good	0.953 \| good	6.22 \| good	0.173 \| good
2025-12-29T15:00:00.000Z	28 \| good	5.164 \| good	22.412 \| good	30.28 \| good	1.046 \| good	7.125 \| good	0.182 \| good
2025-12-29T16:00:00.000Z	28 \| good	5.338 \| good	22.934 \| good	30.114 \| good	0.994 \| good	6.988 \| good	0.179 \| good
2025-12-29T17:00:00.000Z	33 \| good	6.124 \| good	26.842 \| good	28.046 \| good	0.941 \| good	6.851 \| good	0.175 \| good
2025-12-29T18:00:00.000Z	38 \| good	7.484 \| good	32.914 \| good	25.561 \| good	0.889 \| good	6.715 \| good	0.172 \| good
2025-12-29T19:00:00.000Z	49 \| good	8.659 \| good	38.124 \| good	20.796 \| good	1.207 \| good	8.002 \| good	0.178 \| good
2025-12-29T20:00:00.000Z	33 \| good	6.442 \| good	28.359 \| good	29.604 \| good	1.525 \| good	9.289 \| good	0.185 \| good
2025-12-29T21:00:00.000Z	37 \| good	2.883 \| good	11.832 \| good	40.049 \| good	1.843 \| good	10.577 \| good	0.191 \| good
2025-12-29T22:00:00.000Z	36 \| good	3.615 \| good	15.883 \| good	38.512 \| good	1.731 \| good	8.11 \| good	0.185 \| good
2025-12-29T23:00:00.000Z	31 \| good	4.872 \| good	21.115 \| good	33.287 \| good	1.618 \| good	5.643 \| good	0.178 \| good
2025-12-30T00:00:00.000Z	23 \| good	3.286 \| good	14.035 \| good	24.582 \| good	1.505 \| good	3.176 \| good	0.172 \| good
2025-12-30T01:00:00.000Z	20 \| good	2.755 \| good	11.239 \| good	21.887 \| good	1.211 \| good	2.957 \| good	0.17 \| good
2025-12-30T02:00:00.000Z	19 \| good	2.175 \| good	9.039 \| good	20.087 \| good	0.916 \| good	2.739 \| good	0.168 \| good
2025-12-30T03:00:00.000Z	19 \| good	2.63 \| good	10.82 \| good	19.831 \| good	0.621 \| good	2.52 \| good	0.166 \| good
2025-12-30T04:00:00.000Z	19 \| good	2.372 \| good	9.779 \| good	21.258 \| good	0.54 \| good	2.156 \| good	0.159 \| good
2025-12-30T05:00:00.000Z	22 \| good	1.977 \| good	8 \| good	24.169 \| good	0.459 \| good	1.793 \| good	0.153 \| good
2025-12-30T06:00:00.000Z	29 \| good	1.13 \| good	4.826 \| good	31.255 \| good	0.378 \| good	1.43 \| good	0.147 \| good
2025-12-30T07:00:00.000Z	31 \| good	0.885 \| good	3.431 \| good	32.866 \| good	0.337 \| good	1.231 \| good	0.144 \| good
2025-12-30T08:00:00.000Z	31 \| good	0.976 \| good	4 \| good	32.887 \| good	0.295 \| good	1.032 \| good	0.141 \| good
2025-12-30T09:00:00.000Z	31 \| good	0.797 \| good	3 \| good	32.508 \| good	0.253 \| good	0.833 \| good	0.138 \| good
2025-12-30T10:00:00.000Z	30 \| good	0.726 \| good	2.687 \| good	31.53 \| good	0.292 \| good	1.162 \| good	0.141 \| good
2025-12-30T11:00:00.000Z	30 \| good	0.369 \| good	1 \| good	32.026 \| good	0.331 \| good	1.492 \| good	0.144 \| good
2025-12-30T12:00:00.000Z	29 \| good	0.216 \| good	0.954 \| good	31.471 \| good	0.369 \| good	1.822 \| good	0.148 \| good
2025-12-30T13:00:00.000Z	31 \| good	0.217 \| good	0.954 \| good	33.011 \| good	0.365 \| good	1.679 \| good	0.147 \| good
2025-12-30T14:00:00.000Z	30 \| good	0.226 \| good	0.93 \| good	31.847 \| good	0.361 \| good	1.537 \| good	0.146 \| good
2025-12-30T15:00:00.000Z	30 \| good	0.297 \| good	1 \| good	32.451 \| good	0.357 \| good	1.395 \| good	0.145 \| good
2025-12-30T16:00:00.000Z	31 \| good	0.507 \| good	2 \| good	33.767 \| good	0.347 \| good	1.308 \| good	0.143 \| good
2025-12-30T17:00:00.000Z	33 \| good	0.495 \| good	2 \| good	35.602 \| good	0.337 \| good	1.22 \| good	0.142 \| good
2025-12-30T18:00:00.000Z	34 \| good	0.552 \| good	2 \| good	37.083 \| good	0.327 \| good	1.133 \| good	0.14 \| good
2025-12-30T19:00:00.000Z	36 \| good	0.603 \| good	2 \| good	38.662 \| good	0.349 \| good	1.387 \| good	0.139 \| good
2025-12-30T20:00:00.000Z	37 \| good	0.568 \| good	2 \| good	40.133 \| good	0.372 \| good	1.641 \| good	0.138 \| good
2025-12-30T21:00:00.000Z	36 \| good	0.737 \| good	2.89 \| good	39.113 \| good	0.394 \| good	1.895 \| good	0.137 \| good
2025-12-30T22:00:00.000Z	35 \| good	0.935 \| good	3.901 \| good	38.45 \| good	0.485 \| good	2.226 \| good	0.138 \| good
2025-12-30T23:00:00.000Z	36 \| good	0.767 \| good	2.901 \| good	39.119 \| good	0.576 \| good	2.557 \| good	0.139 \| good
2025-12-31T00:00:00.000Z	36 \| good	1.861 \| good	1.918 \| good	39.204 \| good	0.67 \| good	2.905 \| good	0.141 \| good
2025-12-31T01:00:00.000Z	32 \| good	1.005 \| good	4.006 \| good	35.212 \| good	0.658 \| good	2.769 \| good	0.14 \| good
2025-12-31T02:00:00.000Z	31 \| good	0.801 \| good	2.971 \| good	33.722 \| good	0.65 \| good	2.65 \| good	0.139 \| good
2025-12-31T03:00:00.000Z	31 \| good	0.952 \| good	3.832 \| good	33.449 \| good	0.641 \| good	2.531 \| good	0.139 \| good

Colchester

Empower business decisions with accurate air quality data

Colchester, Connecticut air quality map: Real-time AQI near you

0.28ppm

How accurate is Connecticut, USA air quality data?

Air quality measurements for Connecticut, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

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Frequently asked questions

How frequently is the air quality data for Colchester, Connecticut updated?

Air quality data for Colchester, Connecticut is updated on an hourly basis.

When did Colchester, Connecticut experience the worst air quality in the last 24 hours?

The worst air quality in Colchester, Connecticut was recorded at 12:00:00 on 2025-12-28.

When did Colchester, Connecticut have its best air quality in the last 24 hours?

The best air quality in Colchester, Connecticut was recorded at 07:00:00 on 2025-12-28.

What is the real-time air quality index for Colchester, Connecticut?

The real-time air quality index in Colchester, Connecticut is 58, currently categorized as Moderate.

Which pollutant is found most often in Colchester, Connecticut?

The most common pollutant in Colchester, Connecticut is PM2.5.

What can I do if the air quality in Colchester, Connecticut is poor?

If the air quality in Colchester, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Colchester, Connecticut?

The measured PM_2.5 levels in Colchester, Connecticut at present are 13.042 μg/m³.

What are the current PM₁₀ levels at Colchester, Connecticut?

The current PM₁₀ levels in Colchester, Connecticut are 45.759 μg/m³.

What are the current carbon monoxide (CO) levels at Colchester, Connecticut?

The current carbon monoxide (CO) level in Colchester, Connecticut is 0.272 ppm.

What are the current sulfur dioxide (SO₂) levels at Colchester, Connecticut?

The current sulfur dioxide (SO₂) levels in Colchester, Connecticut are 0.296 ppb.

What are the current ozone (O₃) levels at Colchester, Connecticut?

The current ozone (O₃) levels at Colchester, Connecticut is 19.639 ppm.

What are the current nitrogen dioxide (NO₂) levels at Colchester, Connecticut?

The current nitrogen dioxide (NO₂) levels at Colchester, Connecticut is 17.835 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T04:00:00.000Z	25 \| good	3.8 \| good	11.164 \| good	26.978 \| good	0.222 \| good	11.538 \| good	0.2 \| good
2025-12-27T05:00:00.000Z	28 \| good	3.92 \| good	13.159 \| good	30.003 \| good	0.22 \| good	11.277 \| good	0.223 \| good
2025-12-27T06:00:00.000Z	26 \| good	3.759 \| good	8.72 \| good	28.325 \| good	0.205 \| good	9.855 \| good	0.223 \| good
2025-12-27T07:00:00.000Z	24 \| good	3.978 \| good	15.585 \| good	25.931 \| good	0.206 \| good	9.603 \| good	0.2 \| good
2025-12-27T08:00:00.000Z	27 \| good	4.8 \| good	13.748 \| good	27.072 \| good	0.188 \| good	8.15 \| good	0.2 \| good
2025-12-27T09:00:00.000Z	27 \| good	4.218 \| good	8.836 \| good	28.905 \| good	0.243 \| good	7.873 \| good	0.164 \| good
2025-12-27T10:00:00.000Z	24 \| good	3.834 \| good	17.023 \| good	25.501 \| good	0.24 \| good	9.52 \| good	0.165 \| good
2025-12-27T11:00:00.000Z	22 \| good	4.232 \| good	13.851 \| good	23.231 \| good	0.221 \| good	9.105 \| good	0.151 \| good
2025-12-27T12:00:00.000Z	26 \| good	3.425 \| good	14.872 \| good	28.015 \| good	0.164 \| good	9.241 \| good	0.151 \| good
2025-12-27T13:00:00.000Z	26 \| good	3.95 \| good	12.808 \| good	28.288 \| good	0.182 \| good	8.025 \| good	0.15 \| good
2025-12-27T14:00:00.000Z	27 \| good	3.665 \| good	13.04 \| good	28.918 \| good	0.209 \| good	8.504 \| good	0.216 \| good
2025-12-27T15:00:00.000Z	27 \| good	3.611 \| good	10.511 \| good	29.023 \| good	0.193 \| good	7.522 \| good	0.216 \| good
2025-12-27T16:00:00.000Z	28 \| good	3.227 \| good	8.812 \| good	29.939 \| good	0.177 \| good	7.401 \| good	0.237 \| good
2025-12-27T17:00:00.000Z	31 \| good	3.389 \| good	10.978 \| good	32.94 \| good	0.177 \| good	7.011 \| good	0.251 \| good
2025-12-27T18:00:00.000Z	31 \| good	3.479 \| good	4.801 \| good	32.78 \| good	0.194 \| good	7.095 \| good	0.201 \| good
2025-12-27T19:00:00.000Z	31 \| good	3.284 \| good	6.443 \| good	32.898 \| good	0.194 \| good	5.952 \| good	0.201 \| good
2025-12-27T20:00:00.000Z	31 \| good	3.488 \| good	5.993 \| good	33.109 \| good	0.194 \| good	6.761 \| good	0.192 \| good
2025-12-27T21:00:00.000Z	32 \| good	4 \| good	4.793 \| good	34.565 \| good	0.194 \| good	8.495 \| good	0.22 \| good
2025-12-27T22:00:00.000Z	28 \| good	4.243 \| good	22.332 \| good	29.583 \| good	0.194 \| good	14.524 \| good	0.293 \| good
2025-12-27T23:00:00.000Z	29 \| good	4.631 \| good	14.66 \| good	31.402 \| good	0.264 \| good	16.948 \| good	0.364 \| good
2025-12-28T00:00:00.000Z	33 \| good	5.831 \| good	13.656 \| good	27.777 \| good	0.275 \| good	23.491 \| good	0.477 \| good
2025-12-28T01:00:00.000Z	38 \| good	6.775 \| good	16.06 \| good	23.2 \| good	0.423 \| good	20.935 \| good	0.622 \| good
2025-12-28T02:00:00.000Z	54 \| moderate	11.486 \| good	33.942 \| good	19.964 \| good	0.474 \| good	22.184 \| good	0.646 \| good
2025-12-28T03:00:00.000Z	58 \| moderate	12.666 \| fine	56.861 \| fine	12.238 \| good	1.269 \| good	17.829 \| good	0.291 \| good
2025-12-28T04:00:00.000Z	60 \| moderate	14.348 \| fine	23.047 \| good	13.812 \| good	0.528 \| good	17.633 \| good	0.591 \| good
2025-12-28T05:00:00.000Z	67 \| moderate	18.42 \| fine	28.818 \| good	16.269 \| good	0.321 \| good	19.832 \| good	0.582 \| good
2025-12-28T06:00:00.000Z	58 \| moderate	13.146 \| fine	32.363 \| good	8.597 \| good	0.549 \| good	21.968 \| good	0.414 \| good
2025-12-28T07:00:00.000Z	44 \| good	8.071 \| good	39.081 \| good	9.781 \| good	0.506 \| good	18.266 \| good	0.455 \| good
2025-12-28T08:00:00.000Z	44 \| good	7.891 \| good	46.5 \| good	14.946 \| good	0.33 \| good	11.029 \| good	0.382 \| good
2025-12-28T09:00:00.000Z	60 \| moderate	13.799 \| fine	30.664 \| good	5.899 \| good	0.546 \| good	11.318 \| good	0.468 \| good
2025-12-28T10:00:00.000Z	69 \| moderate	18.683 \| fine	35.289 \| good	8.032 \| good	0.544 \| good	12.458 \| good	0.551 \| good
2025-12-28T11:00:00.000Z	60 \| moderate	14.223 \| fine	28.85 \| good	10.438 \| good	0.389 \| good	10.359 \| good	0.462 \| good
2025-12-28T12:00:00.000Z	79 \| moderate	23.549 \| fine	43.455 \| good	9.064 \| good	0.418 \| good	28.9 \| good	0.483 \| good
2025-12-28T13:00:00.000Z	62 \| moderate	14.632 \| fine	23.93 \| good	8.193 \| good	0.418 \| good	16.851 \| good	0.455 \| good
2025-12-28T14:00:00.000Z	60 \| moderate	13.732 \| fine	62.596 \| fine	21.135 \| good	0.482 \| good	21.052 \| good	0.642 \| good
2025-12-28T15:00:00.000Z	54 \| moderate	11.032 \| good	26.738 \| good	12.39 \| good	0.294 \| good	17.8 \| good	0.385 \| good
2025-12-28T16:00:00.000Z	44 \| good	8.281 \| good	22.3 \| good	22.593 \| good	0.287 \| good	17.483 \| good	0.313 \| good
2025-12-28T17:00:00.000Z	49 \| good	8.677 \| good	33.705 \| good	28.305 \| good	0.271 \| good	14.645 \| good	0.25 \| good
2025-12-28T18:00:00.000Z	49 \| good	9.085 \| good	38.408 \| good	29.959 \| good	0.345 \| good	14.027 \| good	0.236 \| good
2025-12-28T19:00:00.000Z	38 \| good	6.796 \| good	20.437 \| good	28.692 \| good	0.318 \| good	17.159 \| good	0.307 \| good
2025-12-28T20:00:00.000Z	40 \| good	6.843 \| good	43.468 \| good	32.299 \| good	0.285 \| good	19.565 \| good	0.343 \| good
2025-12-28T21:00:00.000Z	44 \| good	7.51 \| good	39.801 \| good	30.422 \| good	0.298 \| good	22.759 \| good	0.348 \| good
2025-12-28T22:00:00.000Z	58 \| moderate	12.789 \| fine	46.302 \| good	22.034 \| good	0.27 \| good	27.939 \| good	0.47 \| good
2025-12-28T23:00:00.000Z	66 \| moderate	14.498 \| fine	85.351 \| fine	8.592 \| good	0.24 \| good	26.028 \| good	0.476 \| good
2025-12-29T00:00:00.000Z	56 \| moderate	12.418 \| fine	23.54 \| good	8.151 \| good	0.333 \| good	31.108 \| good	0.386 \| good
2025-12-29T01:00:00.000Z	56 \| moderate	12.381 \| fine	39.871 \| good	17.288 \| good	0.264 \| good	23.982 \| good	0.286 \| good
2025-12-29T02:00:00.000Z	58 \| moderate	13.042 \| fine	45.759 \| good	19.639 \| good	0.296 \| good	17.835 \| good	0.272 \| good
2025-12-29T03:00:00.000Z	58 \| moderate	13.042 \| fine	45.759 \| good	19.639 \| good	0.296 \| good	17.835 \| good	0.272 \| good
2025-12-29T04:00:00.000Z	44 \| good	7.655 \| good	33.571 \| good	27.213 \| good	1.355 \| good	18.189 \| good	0.215 \| good
2025-12-29T05:00:00.000Z	33 \| good	5.966 \| good	26.755 \| good	31.623 \| good	0.843 \| good	11.342 \| good	0.184 \| good
2025-12-29T06:00:00.000Z	32 \| good	4.106 \| good	18.148 \| good	35.288 \| good	0.331 \| good	4.494 \| good	0.154 \| good
2025-12-29T07:00:00.000Z	33 \| good	3.194 \| good	14 \| good	35.535 \| good	0.314 \| good	3.325 \| good	0.146 \| good
2025-12-29T08:00:00.000Z	32 \| good	2.966 \| good	12.093 \| good	35.26 \| good	0.296 \| good	2.156 \| good	0.137 \| good
2025-12-29T09:00:00.000Z	31 \| good	2.859 \| good	11.745 \| good	33.159 \| good	0.279 \| good	0.987 \| good	0.129 \| good
2025-12-29T10:00:00.000Z	31 \| good	2.717 \| good	10.972 \| good	33.059 \| good	0.441 \| good	2.128 \| good	0.137 \| good
2025-12-29T11:00:00.000Z	31 \| good	2.42 \| good	9.851 \| good	32.715 \| good	0.603 \| good	3.269 \| good	0.146 \| good
2025-12-29T12:00:00.000Z	30 \| good	2.522 \| good	10.233 \| good	31.834 \| good	0.765 \| good	4.41 \| good	0.155 \| good
2025-12-29T13:00:00.000Z	30 \| good	3.151 \| good	13.353 \| good	32.284 \| good	0.859 \| good	5.315 \| good	0.164 \| good
2025-12-29T14:00:00.000Z	29 \| good	4.25 \| good	18.685 \| good	30.539 \| good	0.953 \| good	6.22 \| good	0.173 \| good
2025-12-29T15:00:00.000Z	28 \| good	5.164 \| good	22.412 \| good	30.28 \| good	1.046 \| good	7.125 \| good	0.182 \| good
2025-12-29T16:00:00.000Z	28 \| good	5.338 \| good	22.934 \| good	30.114 \| good	0.994 \| good	6.988 \| good	0.179 \| good
2025-12-29T17:00:00.000Z	33 \| good	6.124 \| good	26.842 \| good	28.046 \| good	0.941 \| good	6.851 \| good	0.175 \| good
2025-12-29T18:00:00.000Z	38 \| good	7.484 \| good	32.914 \| good	25.561 \| good	0.889 \| good	6.715 \| good	0.172 \| good
2025-12-29T19:00:00.000Z	49 \| good	8.659 \| good	38.124 \| good	20.796 \| good	1.207 \| good	8.002 \| good	0.178 \| good
2025-12-29T20:00:00.000Z	33 \| good	6.442 \| good	28.359 \| good	29.604 \| good	1.525 \| good	9.289 \| good	0.185 \| good
2025-12-29T21:00:00.000Z	37 \| good	2.883 \| good	11.832 \| good	40.049 \| good	1.843 \| good	10.577 \| good	0.191 \| good
2025-12-29T22:00:00.000Z	36 \| good	3.615 \| good	15.883 \| good	38.512 \| good	1.731 \| good	8.11 \| good	0.185 \| good
2025-12-29T23:00:00.000Z	31 \| good	4.872 \| good	21.115 \| good	33.287 \| good	1.618 \| good	5.643 \| good	0.178 \| good
2025-12-30T00:00:00.000Z	23 \| good	3.286 \| good	14.035 \| good	24.582 \| good	1.505 \| good	3.176 \| good	0.172 \| good
2025-12-30T01:00:00.000Z	20 \| good	2.755 \| good	11.239 \| good	21.887 \| good	1.211 \| good	2.957 \| good	0.17 \| good
2025-12-30T02:00:00.000Z	19 \| good	2.175 \| good	9.039 \| good	20.087 \| good	0.916 \| good	2.739 \| good	0.168 \| good
2025-12-30T03:00:00.000Z	19 \| good	2.63 \| good	10.82 \| good	19.831 \| good	0.621 \| good	2.52 \| good	0.166 \| good
2025-12-30T04:00:00.000Z	19 \| good	2.372 \| good	9.779 \| good	21.258 \| good	0.54 \| good	2.156 \| good	0.159 \| good
2025-12-30T05:00:00.000Z	22 \| good	1.977 \| good	8 \| good	24.169 \| good	0.459 \| good	1.793 \| good	0.153 \| good
2025-12-30T06:00:00.000Z	29 \| good	1.13 \| good	4.826 \| good	31.255 \| good	0.378 \| good	1.43 \| good	0.147 \| good
2025-12-30T07:00:00.000Z	31 \| good	0.885 \| good	3.431 \| good	32.866 \| good	0.337 \| good	1.231 \| good	0.144 \| good
2025-12-30T08:00:00.000Z	31 \| good	0.976 \| good	4 \| good	32.887 \| good	0.295 \| good	1.032 \| good	0.141 \| good
2025-12-30T09:00:00.000Z	31 \| good	0.797 \| good	3 \| good	32.508 \| good	0.253 \| good	0.833 \| good	0.138 \| good
2025-12-30T10:00:00.000Z	30 \| good	0.726 \| good	2.687 \| good	31.53 \| good	0.292 \| good	1.162 \| good	0.141 \| good
2025-12-30T11:00:00.000Z	30 \| good	0.369 \| good	1 \| good	32.026 \| good	0.331 \| good	1.492 \| good	0.144 \| good
2025-12-30T12:00:00.000Z	29 \| good	0.216 \| good	0.954 \| good	31.471 \| good	0.369 \| good	1.822 \| good	0.148 \| good
2025-12-30T13:00:00.000Z	31 \| good	0.217 \| good	0.954 \| good	33.011 \| good	0.365 \| good	1.679 \| good	0.147 \| good
2025-12-30T14:00:00.000Z	30 \| good	0.226 \| good	0.93 \| good	31.847 \| good	0.361 \| good	1.537 \| good	0.146 \| good
2025-12-30T15:00:00.000Z	30 \| good	0.297 \| good	1 \| good	32.451 \| good	0.357 \| good	1.395 \| good	0.145 \| good
2025-12-30T16:00:00.000Z	31 \| good	0.507 \| good	2 \| good	33.767 \| good	0.347 \| good	1.308 \| good	0.143 \| good
2025-12-30T17:00:00.000Z	33 \| good	0.495 \| good	2 \| good	35.602 \| good	0.337 \| good	1.22 \| good	0.142 \| good
2025-12-30T18:00:00.000Z	34 \| good	0.552 \| good	2 \| good	37.083 \| good	0.327 \| good	1.133 \| good	0.14 \| good
2025-12-30T19:00:00.000Z	36 \| good	0.603 \| good	2 \| good	38.662 \| good	0.349 \| good	1.387 \| good	0.139 \| good
2025-12-30T20:00:00.000Z	37 \| good	0.568 \| good	2 \| good	40.133 \| good	0.372 \| good	1.641 \| good	0.138 \| good
2025-12-30T21:00:00.000Z	36 \| good	0.737 \| good	2.89 \| good	39.113 \| good	0.394 \| good	1.895 \| good	0.137 \| good
2025-12-30T22:00:00.000Z	35 \| good	0.935 \| good	3.901 \| good	38.45 \| good	0.485 \| good	2.226 \| good	0.138 \| good
2025-12-30T23:00:00.000Z	36 \| good	0.767 \| good	2.901 \| good	39.119 \| good	0.576 \| good	2.557 \| good	0.139 \| good
2025-12-31T00:00:00.000Z	36 \| good	1.861 \| good	1.918 \| good	39.204 \| good	0.67 \| good	2.905 \| good	0.141 \| good
2025-12-31T01:00:00.000Z	32 \| good	1.005 \| good	4.006 \| good	35.212 \| good	0.658 \| good	2.769 \| good	0.14 \| good
2025-12-31T02:00:00.000Z	31 \| good	0.801 \| good	2.971 \| good	33.722 \| good	0.65 \| good	2.65 \| good	0.139 \| good
2025-12-31T03:00:00.000Z	31 \| good	0.952 \| good	3.832 \| good	33.449 \| good	0.641 \| good	2.531 \| good	0.139 \| good

Real-time air quality index in Colchester, Connecticut today

Common air pollutants in Colchester, Connecticut

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Colchester, Connecticut air quality forecast and history

Empower business decisions with accurate air quality data

Colchester, Connecticut air quality map: Real-time AQI near you

Air quality in nearby cities

East Hampton, Connecticut

Montville, Connecticut

Windham, Connecticut

Glastonbury, Connecticut

Norwich, Connecticut

Coventry, Connecticut

How accurate is Connecticut, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Colchester, Connecticut updated?

When did Colchester, Connecticut experience the worst air quality in the last 24 hours?

When did Colchester, Connecticut have its best air quality in the last 24 hours?

What is the real-time air quality index for Colchester, Connecticut?

Which pollutant is found most often in Colchester, Connecticut?

What can I do if the air quality in Colchester, Connecticut is poor?

What are the current PM2.5 levels in Colchester, Connecticut?

What are the current PM10 levels at Colchester, Connecticut?

What are the current carbon monoxide (CO) levels at Colchester, Connecticut?

What are the current sulfur dioxide (SO2) levels at Colchester, Connecticut?

What are the current ozone (O3) levels at Colchester, Connecticut?

What are the current nitrogen dioxide (NO2) levels at Colchester, Connecticut?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in Colchester, Connecticut?

What are the current PM₁₀ levels at Colchester, Connecticut?

What are the current sulfur dioxide (SO₂) levels at Colchester, Connecticut?

What are the current ozone (O₃) levels at Colchester, Connecticut?

What are the current nitrogen dioxide (NO₂) levels at Colchester, Connecticut?