What are the current PM10 levels at Colchester, Connecticut?

The current PM10 levels in Colchester, Connecticut are 51.268 μg/m3.

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

The current sulfur dioxide (SO2) levels in Colchester, Connecticut are 0.545 ppb.

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

The current ozone (O3) levels at Colchester, Connecticut is 35.269 ppm.

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

The current nitrogen dioxide (NO2) levels at Colchester, Connecticut is 7.983 ppb.

Real-time air quality index in Colchester, Connecticut today

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

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)

Good

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)

9.09 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

46.99 μg/m³

155

255

425

605+

Ozone (O₃)

25.46 ppb

201

201+

Sulfur Dioxide (SO₂)

0.18 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

10.90 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 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
2025-07-28T12:00:00.000Z	71 \| moderate	20.431 \| fine	58.13 \| fine	17.514 \| good	0.216 \| good	9.897 \| good	0.312 \| good
2025-07-28T13:00:00.000Z	64 \| moderate	16.019 \| fine	30.382 \| good	15.86 \| good	0.232 \| good	7.679 \| good	0.281 \| good
2025-07-28T14:00:00.000Z	66 \| moderate	17.007 \| fine	30.938 \| good	21.004 \| good	0.271 \| good	4.616 \| good	0.265 \| good
2025-07-28T15:00:00.000Z	58 \| moderate	12.784 \| fine	54.258 \| good	23.732 \| good	0.229 \| good	4.359 \| good	0.281 \| good
2025-07-28T16:00:00.000Z	56 \| moderate	11.578 \| good	31.968 \| good	26.54 \| good	0.211 \| good	3.078 \| good	0.219 \| good
2025-07-28T17:00:00.000Z	52 \| moderate	10.243 \| good	33.551 \| good	28.128 \| good	0.232 \| good	3.393 \| good	0.219 \| good
2025-07-28T18:00:00.000Z	56 \| moderate	11.534 \| good	41.945 \| good	34.672 \| good	0.398 \| good	6.421 \| good	0.228 \| good
2025-07-28T19:00:00.000Z	52 \| moderate	10.165 \| good	48.567 \| good	40.477 \| good	0.188 \| good	4.639 \| good	0.233 \| good
2025-07-28T20:00:00.000Z	54 \| moderate	11.01 \| good	49.058 \| good	41.112 \| good	0.258 \| good	6.969 \| good	0.241 \| good
2025-07-28T21:00:00.000Z	56 \| moderate	11.616 \| good	32.351 \| good	35.842 \| good	0.193 \| good	4.176 \| good	0.262 \| good
2025-07-28T22:00:00.000Z	56 \| moderate	11.688 \| good	29.582 \| good	44.309 \| good	0.179 \| good	3.463 \| good	0.261 \| good
2025-07-28T23:00:00.000Z	62 \| moderate	14.554 \| fine	42.034 \| good	46.309 \| good	0.197 \| good	5.02 \| good	0.256 \| good
2025-07-29T00:00:00.000Z	60 \| moderate	13.721 \| fine	25.904 \| good	47.615 \| good	0.258 \| good	6.123 \| good	0.265 \| good
2025-07-29T01:00:00.000Z	60 \| moderate	14 \| fine	31.598 \| good	45.606 \| good	0.192 \| good	3.824 \| good	0.277 \| good
2025-07-29T02:00:00.000Z	64 \| moderate	15.782 \| fine	24.842 \| good	36.616 \| good	0.247 \| good	11.685 \| good	0.291 \| good
2025-07-29T03:00:00.000Z	62 \| moderate	15.253 \| fine	20.116 \| good	29.25 \| good	0.229 \| good	11.12 \| good	0.362 \| good
2025-07-29T04:00:00.000Z	64 \| moderate	15.804 \| fine	31.509 \| good	34.508 \| good	0.22 \| good	17.001 \| good	0.363 \| good
2025-07-29T05:00:00.000Z	64 \| moderate	16.302 \| fine	55.822 \| fine	34.419 \| good	0.788 \| good	8.501 \| good	0.314 \| good
2025-07-29T06:00:00.000Z	62 \| moderate	15.148 \| fine	53.811 \| good	32.156 \| good	0.742 \| good	10.654 \| good	0.312 \| good
2025-07-29T07:00:00.000Z	56 \| moderate	12.32 \| fine	57.649 \| fine	26.251 \| good	0.284 \| good	8.628 \| good	0.314 \| good
2025-07-29T08:00:00.000Z	60 \| moderate	14.289 \| fine	44.637 \| good	24.611 \| good	0.254 \| good	8.273 \| good	0.314 \| good
2025-07-29T09:00:00.000Z	62 \| moderate	14.86 \| fine	39.299 \| good	20.891 \| good	0.208 \| good	11.043 \| good	0.326 \| good
2025-07-29T10:00:00.000Z	64 \| moderate	16.169 \| fine	48.183 \| good	18.252 \| good	0.209 \| good	7.085 \| good	0.37 \| good
2025-07-29T11:00:00.000Z	64 \| moderate	15.725 \| fine	56.5 \| fine	22.616 \| good	0.227 \| good	11.298 \| good	0.41 \| good
2025-07-29T12:00:00.000Z	62 \| moderate	14.582 \| fine	26.821 \| good	14.311 \| good	0.142 \| good	13.774 \| good	0.507 \| good
2025-07-29T13:00:00.000Z	60 \| moderate	14.129 \| fine	26.566 \| good	20.005 \| good	0.262 \| good	14.098 \| good	0.519 \| good
2025-07-29T14:00:00.000Z	58 \| moderate	13.46 \| fine	35.219 \| good	23.462 \| good	0.351 \| good	10.686 \| good	0.414 \| good
2025-07-29T15:00:00.000Z	58 \| moderate	13.286 \| fine	56.589 \| fine	30.986 \| good	0.582 \| good	9.62 \| good	0.408 \| good
2025-07-29T16:00:00.000Z	60 \| moderate	13.958 \| fine	51.268 \| good	35.269 \| good	0.545 \| good	7.983 \| good	0.359 \| good
2025-07-29T17:00:00.000Z	60 \| moderate	14.079 \| fine	63.529 \| fine	43.603 \| good	0.442 \| good	6.089 \| good	0.359 \| good
2025-07-29T18:00:00.000Z	58 \| moderate	13.052 \| fine	44.131 \| good	44.578 \| good	0.375 \| good	5.961 \| good	0.507 \| good
2025-07-29T19:00:00.000Z	56 \| moderate	11.688 \| good	36.055 \| good	47.632 \| good	0.359 \| good	8.105 \| good	0.327 \| good
2025-07-29T20:00:00.000Z	56 \| moderate	11.68 \| good	52.662 \| good	48.432 \| good	0.431 \| good	17.349 \| good	0.301 \| good
2025-07-29T21:00:00.000Z	54 \| moderate	10.798 \| good	47.583 \| good	47.369 \| good	0.462 \| good	16.985 \| good	0.262 \| good
2025-07-29T22:00:00.000Z	54 \| moderate	11.24 \| good	47.266 \| good	50.576 \| good	0.344 \| good	3.403 \| good	0.262 \| good
2025-07-29T23:00:00.000Z	49 \| good	9.448 \| good	36.93 \| good	44.71 \| good	0.393 \| good	12.311 \| good	0.262 \| good
2025-07-30T00:00:00.000Z	52 \| moderate	10.222 \| good	32.418 \| good	45.818 \| good	0.406 \| good	10.782 \| good	0.278 \| good
2025-07-30T01:00:00.000Z	52 \| moderate	10.49 \| good	28.777 \| good	41.5 \| good	0.389 \| good	11.18 \| good	0.247 \| good
2025-07-30T02:00:00.000Z	49 \| good	9.413 \| good	27.297 \| good	43.237 \| good	0.365 \| good	7.627 \| good	0.315 \| good
2025-07-30T03:00:00.000Z	67 \| moderate	18.287 \| fine	80.607 \| fine	27.114 \| good	0.988 \| good	15.213 \| good	0.406 \| good
2025-07-30T04:00:00.000Z	54 \| moderate	10.776 \| good	30.886 \| good	38.988 \| good	0.359 \| good	12.034 \| good	0.324 \| good
2025-07-30T05:00:00.000Z	56 \| moderate	11.963 \| good	58.314 \| fine	37.333 \| good	0.425 \| good	13.682 \| good	0.303 \| good
2025-07-30T06:00:00.000Z	59 \| moderate	12.446 \| fine	71.716 \| fine	36.746 \| good	0.358 \| good	15.392 \| good	0.264 \| good
2025-07-30T07:00:00.000Z	58 \| moderate	13.449 \| fine	59.876 \| fine	41.548 \| good	0.227 \| good	13.865 \| good	0.25 \| good
2025-07-30T08:00:00.000Z	62 \| moderate	14.747 \| fine	34.413 \| good	26.677 \| good	0.272 \| good	13.528 \| good	0.25 \| good
2025-07-30T09:00:00.000Z	58 \| moderate	13.338 \| fine	27.75 \| good	18.335 \| good	0.2 \| good	12.495 \| good	0.227 \| good
2025-07-30T10:00:00.000Z	49 \| good	9.088 \| good	46.994 \| good	25.462 \| good	0.181 \| good	10.9 \| good	0.301 \| good
2025-07-30T11:00:00.000Z	49 \| good	9.088 \| good	46.994 \| good	25.462 \| good	0.181 \| good	10.9 \| good	0.301 \| good
2025-07-29T18:00:00.000Z	69 \| moderate	18.612 \| fine	82.67 \| fine	51.965 \| good	0.462 \| good	1.264 \| good	0.207 \| good
2025-07-29T19:00:00.000Z	66 \| moderate	16.676 \| fine	73.535 \| fine	48.249 \| good	0.453 \| good	1.479 \| good	0.201 \| good
2025-07-29T20:00:00.000Z	64 \| moderate	16.065 \| fine	71.088 \| fine	45.473 \| good	0.444 \| good	1.694 \| good	0.196 \| good
2025-07-29T21:00:00.000Z	64 \| moderate	15.736 \| fine	70.054 \| fine	43.031 \| good	0.435 \| good	1.909 \| good	0.191 \| good
2025-07-29T22:00:00.000Z	66 \| moderate	17.229 \| fine	76.821 \| fine	40.264 \| good	0.478 \| good	4.48 \| good	0.218 \| good
2025-07-29T23:00:00.000Z	69 \| moderate	18.699 \| fine	82.984 \| fine	39.44 \| good	0.52 \| good	7.051 \| good	0.246 \| good
2025-07-30T00:00:00.000Z	69 \| moderate	19.321 \| fine	85.108 \| fine	36.744 \| good	0.563 \| good	9.622 \| good	0.273 \| good
2025-07-30T01:00:00.000Z	69 \| moderate	19.096 \| fine	84.258 \| fine	29.911 \| good	0.618 \| good	9.045 \| good	0.261 \| good
2025-07-30T02:00:00.000Z	69 \| moderate	19.206 \| fine	85.233 \| fine	29.043 \| good	0.673 \| good	8.467 \| good	0.249 \| good
2025-07-30T03:00:00.000Z	71 \| moderate	19.947 \| fine	87.314 \| fine	27.959 \| good	0.729 \| good	7.889 \| good	0.237 \| good
2025-07-30T04:00:00.000Z	69 \| moderate	19.165 \| fine	84.078 \| fine	24.231 \| good	0.718 \| good	6.951 \| good	0.226 \| good
2025-07-30T05:00:00.000Z	67 \| moderate	17.882 \| fine	79.158 \| fine	19.493 \| good	0.707 \| good	6.012 \| good	0.215 \| good
2025-07-30T06:00:00.000Z	66 \| moderate	16.689 \| fine	73.764 \| fine	15.322 \| good	0.696 \| good	5.074 \| good	0.204 \| good
2025-07-30T07:00:00.000Z	66 \| moderate	16.513 \| fine	73.45 \| fine	14.435 \| good	0.697 \| good	4.949 \| good	0.204 \| good
2025-07-30T08:00:00.000Z	66 \| moderate	17.157 \| fine	75.885 \| fine	14.926 \| good	0.698 \| good	4.823 \| good	0.203 \| good
2025-07-30T09:00:00.000Z	73 \| moderate	20.543 \| fine	90.083 \| fine	15.857 \| good	0.7 \| good	4.698 \| good	0.202 \| good
2025-07-30T10:00:00.000Z	71 \| moderate	19.639 \| fine	86.508 \| fine	16.379 \| good	0.712 \| good	4.688 \| good	0.215 \| good
2025-07-30T11:00:00.000Z	75 \| moderate	21.728 \| fine	95.241 \| fine	21.486 \| good	0.725 \| good	4.678 \| good	0.228 \| good
2025-07-30T12:00:00.000Z	81 \| moderate	24.537 \| fine	107.467 \| fine	29.638 \| good	0.737 \| good	4.669 \| good	0.241 \| good
2025-07-30T13:00:00.000Z	73 \| moderate	21.126 \| fine	93.202 \| fine	37.107 \| good	0.762 \| good	3.939 \| good	0.233 \| good
2025-07-30T14:00:00.000Z	71 \| moderate	20.321 \| fine	88.913 \| fine	44.142 \| good	0.787 \| good	3.21 \| good	0.225 \| good
2025-07-30T15:00:00.000Z	73 \| moderate	21.432 \| fine	94.795 \| fine	51.872 \| good	0.812 \| good	2.481 \| good	0.217 \| good
2025-07-30T16:00:00.000Z	73 \| moderate	21.454 \| fine	94.091 \| fine	57.708 \| fine	0.687 \| good	2.085 \| good	0.212 \| good
2025-07-30T17:00:00.000Z	71 \| moderate	20.274 \| fine	89.497 \| fine	54.903 \| good	0.563 \| good	1.69 \| good	0.206 \| good
2025-07-30T18:00:00.000Z	71 \| moderate	19.648 \| fine	86.635 \| fine	56.346 \| fine	0.439 \| good	1.295 \| good	0.201 \| good
2025-07-30T19:00:00.000Z	77 \| moderate	20.752 \| fine	91.28 \| fine	63.412 \| fine	0.427 \| good	1.421 \| good	0.199 \| good
2025-07-30T20:00:00.000Z	84 \| moderate	22.122 \| fine	97.151 \| fine	65.484 \| fine	0.416 \| good	1.547 \| good	0.198 \| good
2025-07-30T21:00:00.000Z	84 \| moderate	22.385 \| fine	98.425 \| fine	65.335 \| fine	0.405 \| good	1.672 \| good	0.196 \| good
2025-07-30T22:00:00.000Z	75 \| moderate	22.128 \| fine	96.879 \| fine	61.847 \| fine	0.462 \| good	5.816 \| good	0.249 \| good
2025-07-30T23:00:00.000Z	79 \| moderate	24.471 \| fine	107.05 \| fine	60.558 \| fine	0.519 \| good	9.959 \| good	0.301 \| good
2025-07-31T00:00:00.000Z	82 \| moderate	25.931 \| fine	112.653 \| fine	58.803 \| fine	0.577 \| good	14.103 \| good	0.354 \| good
2025-07-31T01:00:00.000Z	77 \| moderate	22.604 \| fine	99.015 \| fine	51.991 \| good	0.633 \| good	14.338 \| good	0.361 \| good
2025-07-31T02:00:00.000Z	71 \| moderate	19.601 \| fine	86.242 \| fine	46.165 \| good	0.689 \| good	14.574 \| good	0.367 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	16.393 \| fine	73.186 \| fine	43.891 \| good	0.746 \| good	14.809 \| good	0.373 \| good
2025-07-31T04:00:00.000Z	58 \| moderate	13.214 \| fine	59.908 \| fine	41.226 \| good	0.752 \| good	15.4 \| good	0.382 \| good
2025-07-31T05:00:00.000Z	56 \| moderate	12.413 \| fine	55.776 \| fine	38.11 \| good	0.759 \| good	15.991 \| good	0.39 \| good
2025-07-31T06:00:00.000Z	56 \| moderate	12.348 \| fine	55.775 \| fine	36.325 \| good	0.765 \| good	16.581 \| good	0.398 \| good
2025-07-31T07:00:00.000Z	54 \| moderate	11.469 \| good	50.971 \| good	35.631 \| good	0.781 \| good	13.402 \| good	0.355 \| good
2025-07-31T08:00:00.000Z	56 \| moderate	11.78 \| good	52.097 \| good	33.924 \| good	0.797 \| good	10.223 \| good	0.312 \| good
2025-07-31T09:00:00.000Z	60 \| moderate	14.186 \| fine	63.734 \| fine	33.822 \| good	0.813 \| good	7.044 \| good	0.269 \| good
2025-07-31T10:00:00.000Z	64 \| moderate	16.239 \| fine	72.476 \| fine	29.015 \| good	0.779 \| good	5.905 \| good	0.249 \| good
2025-07-31T11:00:00.000Z	71 \| moderate	19.571 \| fine	86.468 \| fine	25.49 \| good	0.745 \| good	4.765 \| good	0.23 \| good
2025-07-31T12:00:00.000Z	73 \| moderate	20.877 \| fine	91.547 \| fine	27.487 \| good	0.711 \| good	3.626 \| good	0.21 \| good
2025-07-31T13:00:00.000Z	69 \| moderate	19.167 \| fine	84.805 \| fine	29.004 \| good	0.708 \| good	3.385 \| good	0.207 \| good
2025-07-31T14:00:00.000Z	69 \| moderate	18.827 \| fine	83.221 \| fine	37.512 \| good	0.705 \| good	3.145 \| good	0.204 \| good
2025-07-31T15:00:00.000Z	67 \| moderate	17.545 \| fine	78.242 \| fine	42.3 \| good	0.702 \| good	2.904 \| good	0.2 \| good
2025-07-31T16:00:00.000Z	64 \| moderate	15.712 \| fine	70.437 \| fine	43.772 \| good	0.653 \| good	2.611 \| good	0.199 \| good
2025-07-31T17:00:00.000Z	60 \| moderate	14.39 \| fine	64.763 \| fine	43.626 \| good	0.604 \| good	2.318 \| good	0.197 \| good

Colchester

Empower business decisions with accurate air quality data

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

0.35ppm

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 11:00:00 on 2025-07-29.

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 2025-07-28.

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

The real-time air quality index in Colchester, Connecticut is 60, 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 13.958 μg/m³.

What are the current PM₁₀ levels at Colchester, Connecticut?

The current PM₁₀ levels in Colchester, Connecticut are 51.268 μg/m³.

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

The current carbon monoxide (CO) level in Colchester, Connecticut is 0.359 ppm.

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

The current sulfur dioxide (SO₂) levels in Colchester, Connecticut are 0.545 ppb.

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

The current ozone (O₃) levels at Colchester, Connecticut is 35.269 ppm.

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

The current nitrogen dioxide (NO₂) levels at Colchester, Connecticut is 7.983 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-28T12:00:00.000Z	71 \| moderate	20.431 \| fine	58.13 \| fine	17.514 \| good	0.216 \| good	9.897 \| good	0.312 \| good
2025-07-28T13:00:00.000Z	64 \| moderate	16.019 \| fine	30.382 \| good	15.86 \| good	0.232 \| good	7.679 \| good	0.281 \| good
2025-07-28T14:00:00.000Z	66 \| moderate	17.007 \| fine	30.938 \| good	21.004 \| good	0.271 \| good	4.616 \| good	0.265 \| good
2025-07-28T15:00:00.000Z	58 \| moderate	12.784 \| fine	54.258 \| good	23.732 \| good	0.229 \| good	4.359 \| good	0.281 \| good
2025-07-28T16:00:00.000Z	56 \| moderate	11.578 \| good	31.968 \| good	26.54 \| good	0.211 \| good	3.078 \| good	0.219 \| good
2025-07-28T17:00:00.000Z	52 \| moderate	10.243 \| good	33.551 \| good	28.128 \| good	0.232 \| good	3.393 \| good	0.219 \| good
2025-07-28T18:00:00.000Z	56 \| moderate	11.534 \| good	41.945 \| good	34.672 \| good	0.398 \| good	6.421 \| good	0.228 \| good
2025-07-28T19:00:00.000Z	52 \| moderate	10.165 \| good	48.567 \| good	40.477 \| good	0.188 \| good	4.639 \| good	0.233 \| good
2025-07-28T20:00:00.000Z	54 \| moderate	11.01 \| good	49.058 \| good	41.112 \| good	0.258 \| good	6.969 \| good	0.241 \| good
2025-07-28T21:00:00.000Z	56 \| moderate	11.616 \| good	32.351 \| good	35.842 \| good	0.193 \| good	4.176 \| good	0.262 \| good
2025-07-28T22:00:00.000Z	56 \| moderate	11.688 \| good	29.582 \| good	44.309 \| good	0.179 \| good	3.463 \| good	0.261 \| good
2025-07-28T23:00:00.000Z	62 \| moderate	14.554 \| fine	42.034 \| good	46.309 \| good	0.197 \| good	5.02 \| good	0.256 \| good
2025-07-29T00:00:00.000Z	60 \| moderate	13.721 \| fine	25.904 \| good	47.615 \| good	0.258 \| good	6.123 \| good	0.265 \| good
2025-07-29T01:00:00.000Z	60 \| moderate	14 \| fine	31.598 \| good	45.606 \| good	0.192 \| good	3.824 \| good	0.277 \| good
2025-07-29T02:00:00.000Z	64 \| moderate	15.782 \| fine	24.842 \| good	36.616 \| good	0.247 \| good	11.685 \| good	0.291 \| good
2025-07-29T03:00:00.000Z	62 \| moderate	15.253 \| fine	20.116 \| good	29.25 \| good	0.229 \| good	11.12 \| good	0.362 \| good
2025-07-29T04:00:00.000Z	64 \| moderate	15.804 \| fine	31.509 \| good	34.508 \| good	0.22 \| good	17.001 \| good	0.363 \| good
2025-07-29T05:00:00.000Z	64 \| moderate	16.302 \| fine	55.822 \| fine	34.419 \| good	0.788 \| good	8.501 \| good	0.314 \| good
2025-07-29T06:00:00.000Z	62 \| moderate	15.148 \| fine	53.811 \| good	32.156 \| good	0.742 \| good	10.654 \| good	0.312 \| good
2025-07-29T07:00:00.000Z	56 \| moderate	12.32 \| fine	57.649 \| fine	26.251 \| good	0.284 \| good	8.628 \| good	0.314 \| good
2025-07-29T08:00:00.000Z	60 \| moderate	14.289 \| fine	44.637 \| good	24.611 \| good	0.254 \| good	8.273 \| good	0.314 \| good
2025-07-29T09:00:00.000Z	62 \| moderate	14.86 \| fine	39.299 \| good	20.891 \| good	0.208 \| good	11.043 \| good	0.326 \| good
2025-07-29T10:00:00.000Z	64 \| moderate	16.169 \| fine	48.183 \| good	18.252 \| good	0.209 \| good	7.085 \| good	0.37 \| good
2025-07-29T11:00:00.000Z	64 \| moderate	15.725 \| fine	56.5 \| fine	22.616 \| good	0.227 \| good	11.298 \| good	0.41 \| good
2025-07-29T12:00:00.000Z	62 \| moderate	14.582 \| fine	26.821 \| good	14.311 \| good	0.142 \| good	13.774 \| good	0.507 \| good
2025-07-29T13:00:00.000Z	60 \| moderate	14.129 \| fine	26.566 \| good	20.005 \| good	0.262 \| good	14.098 \| good	0.519 \| good
2025-07-29T14:00:00.000Z	58 \| moderate	13.46 \| fine	35.219 \| good	23.462 \| good	0.351 \| good	10.686 \| good	0.414 \| good
2025-07-29T15:00:00.000Z	58 \| moderate	13.286 \| fine	56.589 \| fine	30.986 \| good	0.582 \| good	9.62 \| good	0.408 \| good
2025-07-29T16:00:00.000Z	60 \| moderate	13.958 \| fine	51.268 \| good	35.269 \| good	0.545 \| good	7.983 \| good	0.359 \| good
2025-07-29T17:00:00.000Z	60 \| moderate	14.079 \| fine	63.529 \| fine	43.603 \| good	0.442 \| good	6.089 \| good	0.359 \| good
2025-07-29T18:00:00.000Z	58 \| moderate	13.052 \| fine	44.131 \| good	44.578 \| good	0.375 \| good	5.961 \| good	0.507 \| good
2025-07-29T19:00:00.000Z	56 \| moderate	11.688 \| good	36.055 \| good	47.632 \| good	0.359 \| good	8.105 \| good	0.327 \| good
2025-07-29T20:00:00.000Z	56 \| moderate	11.68 \| good	52.662 \| good	48.432 \| good	0.431 \| good	17.349 \| good	0.301 \| good
2025-07-29T21:00:00.000Z	54 \| moderate	10.798 \| good	47.583 \| good	47.369 \| good	0.462 \| good	16.985 \| good	0.262 \| good
2025-07-29T22:00:00.000Z	54 \| moderate	11.24 \| good	47.266 \| good	50.576 \| good	0.344 \| good	3.403 \| good	0.262 \| good
2025-07-29T23:00:00.000Z	49 \| good	9.448 \| good	36.93 \| good	44.71 \| good	0.393 \| good	12.311 \| good	0.262 \| good
2025-07-30T00:00:00.000Z	52 \| moderate	10.222 \| good	32.418 \| good	45.818 \| good	0.406 \| good	10.782 \| good	0.278 \| good
2025-07-30T01:00:00.000Z	52 \| moderate	10.49 \| good	28.777 \| good	41.5 \| good	0.389 \| good	11.18 \| good	0.247 \| good
2025-07-30T02:00:00.000Z	49 \| good	9.413 \| good	27.297 \| good	43.237 \| good	0.365 \| good	7.627 \| good	0.315 \| good
2025-07-30T03:00:00.000Z	67 \| moderate	18.287 \| fine	80.607 \| fine	27.114 \| good	0.988 \| good	15.213 \| good	0.406 \| good
2025-07-30T04:00:00.000Z	54 \| moderate	10.776 \| good	30.886 \| good	38.988 \| good	0.359 \| good	12.034 \| good	0.324 \| good
2025-07-30T05:00:00.000Z	56 \| moderate	11.963 \| good	58.314 \| fine	37.333 \| good	0.425 \| good	13.682 \| good	0.303 \| good
2025-07-30T06:00:00.000Z	59 \| moderate	12.446 \| fine	71.716 \| fine	36.746 \| good	0.358 \| good	15.392 \| good	0.264 \| good
2025-07-30T07:00:00.000Z	58 \| moderate	13.449 \| fine	59.876 \| fine	41.548 \| good	0.227 \| good	13.865 \| good	0.25 \| good
2025-07-30T08:00:00.000Z	62 \| moderate	14.747 \| fine	34.413 \| good	26.677 \| good	0.272 \| good	13.528 \| good	0.25 \| good
2025-07-30T09:00:00.000Z	58 \| moderate	13.338 \| fine	27.75 \| good	18.335 \| good	0.2 \| good	12.495 \| good	0.227 \| good
2025-07-30T10:00:00.000Z	49 \| good	9.088 \| good	46.994 \| good	25.462 \| good	0.181 \| good	10.9 \| good	0.301 \| good
2025-07-30T11:00:00.000Z	49 \| good	9.088 \| good	46.994 \| good	25.462 \| good	0.181 \| good	10.9 \| good	0.301 \| good
2025-07-29T18:00:00.000Z	69 \| moderate	18.612 \| fine	82.67 \| fine	51.965 \| good	0.462 \| good	1.264 \| good	0.207 \| good
2025-07-29T19:00:00.000Z	66 \| moderate	16.676 \| fine	73.535 \| fine	48.249 \| good	0.453 \| good	1.479 \| good	0.201 \| good
2025-07-29T20:00:00.000Z	64 \| moderate	16.065 \| fine	71.088 \| fine	45.473 \| good	0.444 \| good	1.694 \| good	0.196 \| good
2025-07-29T21:00:00.000Z	64 \| moderate	15.736 \| fine	70.054 \| fine	43.031 \| good	0.435 \| good	1.909 \| good	0.191 \| good
2025-07-29T22:00:00.000Z	66 \| moderate	17.229 \| fine	76.821 \| fine	40.264 \| good	0.478 \| good	4.48 \| good	0.218 \| good
2025-07-29T23:00:00.000Z	69 \| moderate	18.699 \| fine	82.984 \| fine	39.44 \| good	0.52 \| good	7.051 \| good	0.246 \| good
2025-07-30T00:00:00.000Z	69 \| moderate	19.321 \| fine	85.108 \| fine	36.744 \| good	0.563 \| good	9.622 \| good	0.273 \| good
2025-07-30T01:00:00.000Z	69 \| moderate	19.096 \| fine	84.258 \| fine	29.911 \| good	0.618 \| good	9.045 \| good	0.261 \| good
2025-07-30T02:00:00.000Z	69 \| moderate	19.206 \| fine	85.233 \| fine	29.043 \| good	0.673 \| good	8.467 \| good	0.249 \| good
2025-07-30T03:00:00.000Z	71 \| moderate	19.947 \| fine	87.314 \| fine	27.959 \| good	0.729 \| good	7.889 \| good	0.237 \| good
2025-07-30T04:00:00.000Z	69 \| moderate	19.165 \| fine	84.078 \| fine	24.231 \| good	0.718 \| good	6.951 \| good	0.226 \| good
2025-07-30T05:00:00.000Z	67 \| moderate	17.882 \| fine	79.158 \| fine	19.493 \| good	0.707 \| good	6.012 \| good	0.215 \| good
2025-07-30T06:00:00.000Z	66 \| moderate	16.689 \| fine	73.764 \| fine	15.322 \| good	0.696 \| good	5.074 \| good	0.204 \| good
2025-07-30T07:00:00.000Z	66 \| moderate	16.513 \| fine	73.45 \| fine	14.435 \| good	0.697 \| good	4.949 \| good	0.204 \| good
2025-07-30T08:00:00.000Z	66 \| moderate	17.157 \| fine	75.885 \| fine	14.926 \| good	0.698 \| good	4.823 \| good	0.203 \| good
2025-07-30T09:00:00.000Z	73 \| moderate	20.543 \| fine	90.083 \| fine	15.857 \| good	0.7 \| good	4.698 \| good	0.202 \| good
2025-07-30T10:00:00.000Z	71 \| moderate	19.639 \| fine	86.508 \| fine	16.379 \| good	0.712 \| good	4.688 \| good	0.215 \| good
2025-07-30T11:00:00.000Z	75 \| moderate	21.728 \| fine	95.241 \| fine	21.486 \| good	0.725 \| good	4.678 \| good	0.228 \| good
2025-07-30T12:00:00.000Z	81 \| moderate	24.537 \| fine	107.467 \| fine	29.638 \| good	0.737 \| good	4.669 \| good	0.241 \| good
2025-07-30T13:00:00.000Z	73 \| moderate	21.126 \| fine	93.202 \| fine	37.107 \| good	0.762 \| good	3.939 \| good	0.233 \| good
2025-07-30T14:00:00.000Z	71 \| moderate	20.321 \| fine	88.913 \| fine	44.142 \| good	0.787 \| good	3.21 \| good	0.225 \| good
2025-07-30T15:00:00.000Z	73 \| moderate	21.432 \| fine	94.795 \| fine	51.872 \| good	0.812 \| good	2.481 \| good	0.217 \| good
2025-07-30T16:00:00.000Z	73 \| moderate	21.454 \| fine	94.091 \| fine	57.708 \| fine	0.687 \| good	2.085 \| good	0.212 \| good
2025-07-30T17:00:00.000Z	71 \| moderate	20.274 \| fine	89.497 \| fine	54.903 \| good	0.563 \| good	1.69 \| good	0.206 \| good
2025-07-30T18:00:00.000Z	71 \| moderate	19.648 \| fine	86.635 \| fine	56.346 \| fine	0.439 \| good	1.295 \| good	0.201 \| good
2025-07-30T19:00:00.000Z	77 \| moderate	20.752 \| fine	91.28 \| fine	63.412 \| fine	0.427 \| good	1.421 \| good	0.199 \| good
2025-07-30T20:00:00.000Z	84 \| moderate	22.122 \| fine	97.151 \| fine	65.484 \| fine	0.416 \| good	1.547 \| good	0.198 \| good
2025-07-30T21:00:00.000Z	84 \| moderate	22.385 \| fine	98.425 \| fine	65.335 \| fine	0.405 \| good	1.672 \| good	0.196 \| good
2025-07-30T22:00:00.000Z	75 \| moderate	22.128 \| fine	96.879 \| fine	61.847 \| fine	0.462 \| good	5.816 \| good	0.249 \| good
2025-07-30T23:00:00.000Z	79 \| moderate	24.471 \| fine	107.05 \| fine	60.558 \| fine	0.519 \| good	9.959 \| good	0.301 \| good
2025-07-31T00:00:00.000Z	82 \| moderate	25.931 \| fine	112.653 \| fine	58.803 \| fine	0.577 \| good	14.103 \| good	0.354 \| good
2025-07-31T01:00:00.000Z	77 \| moderate	22.604 \| fine	99.015 \| fine	51.991 \| good	0.633 \| good	14.338 \| good	0.361 \| good
2025-07-31T02:00:00.000Z	71 \| moderate	19.601 \| fine	86.242 \| fine	46.165 \| good	0.689 \| good	14.574 \| good	0.367 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	16.393 \| fine	73.186 \| fine	43.891 \| good	0.746 \| good	14.809 \| good	0.373 \| good
2025-07-31T04:00:00.000Z	58 \| moderate	13.214 \| fine	59.908 \| fine	41.226 \| good	0.752 \| good	15.4 \| good	0.382 \| good
2025-07-31T05:00:00.000Z	56 \| moderate	12.413 \| fine	55.776 \| fine	38.11 \| good	0.759 \| good	15.991 \| good	0.39 \| good
2025-07-31T06:00:00.000Z	56 \| moderate	12.348 \| fine	55.775 \| fine	36.325 \| good	0.765 \| good	16.581 \| good	0.398 \| good
2025-07-31T07:00:00.000Z	54 \| moderate	11.469 \| good	50.971 \| good	35.631 \| good	0.781 \| good	13.402 \| good	0.355 \| good
2025-07-31T08:00:00.000Z	56 \| moderate	11.78 \| good	52.097 \| good	33.924 \| good	0.797 \| good	10.223 \| good	0.312 \| good
2025-07-31T09:00:00.000Z	60 \| moderate	14.186 \| fine	63.734 \| fine	33.822 \| good	0.813 \| good	7.044 \| good	0.269 \| good
2025-07-31T10:00:00.000Z	64 \| moderate	16.239 \| fine	72.476 \| fine	29.015 \| good	0.779 \| good	5.905 \| good	0.249 \| good
2025-07-31T11:00:00.000Z	71 \| moderate	19.571 \| fine	86.468 \| fine	25.49 \| good	0.745 \| good	4.765 \| good	0.23 \| good
2025-07-31T12:00:00.000Z	73 \| moderate	20.877 \| fine	91.547 \| fine	27.487 \| good	0.711 \| good	3.626 \| good	0.21 \| good
2025-07-31T13:00:00.000Z	69 \| moderate	19.167 \| fine	84.805 \| fine	29.004 \| good	0.708 \| good	3.385 \| good	0.207 \| good
2025-07-31T14:00:00.000Z	69 \| moderate	18.827 \| fine	83.221 \| fine	37.512 \| good	0.705 \| good	3.145 \| good	0.204 \| good
2025-07-31T15:00:00.000Z	67 \| moderate	17.545 \| fine	78.242 \| fine	42.3 \| good	0.702 \| good	2.904 \| good	0.2 \| good
2025-07-31T16:00:00.000Z	64 \| moderate	15.712 \| fine	70.437 \| fine	43.772 \| good	0.653 \| good	2.611 \| good	0.199 \| good
2025-07-31T17:00:00.000Z	60 \| moderate	14.39 \| fine	64.763 \| fine	43.626 \| good	0.604 \| good	2.318 \| good	0.197 \| 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?