What is the current concentration of PM10 in Winchester, Connecticut?

The current PM10 concentration at Winchester, Connecticut is 21.205 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Winchester, Connecticut?

The current sulfur dioxide (SO2) concentration at Winchester, Connecticut is 0.258 ppb.

What is the current concentration of ozone (O3) in Winchester, Connecticut?

The current ozone (O3) concentration at Winchester, Connecticut is 16.154 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Winchester, Connecticut?

The current nitrogen dioxide (NO2) concentration at Winchester, Connecticut is 16.267 ppb.

Winchester, Connecticut live air quality index now

Q: What is the current concentration of PM2.5 in Winchester, Connecticut?

The current PM2.5 concentration at Winchester, Connecticut is 11.586 μg/m3.

Stay updated with real-time air quality in Winchester, 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

Winchester, Connecticut

Last updated: ... (Local time)

Major air pollutants in Winchester, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

11.59 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

21.20 μg/m³

155

255

425

605+

Ozone (O₃)

16.15 ppb

201

201+

Sulfur Dioxide (SO₂)

0.26 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

16.27 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.24 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Winchester, Connecticut

Get Live Pollen Counts

Winchester, Connecticut

Scroll To Air Quality Map

Track live Winchester, Connecticut air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T09:00:00.000Z	27 \| good	4.174 \| good	23.243 \| good	29.351 \| good	0.29 \| good	7.09 \| good	0.179 \| good
2025-12-27T10:00:00.000Z	27 \| good	4.098 \| good	19.472 \| good	28.886 \| good	0.218 \| good	8.111 \| good	0.137 \| good
2025-12-27T11:00:00.000Z	25 \| good	4.327 \| good	16.504 \| good	27.275 \| good	0.206 \| good	7.234 \| good	0.13 \| good
2025-12-27T12:00:00.000Z	28 \| good	3.819 \| good	10.819 \| good	30.481 \| good	0.129 \| good	7.22 \| good	0.13 \| good
2025-12-27T13:00:00.000Z	29 \| good	3.38 \| good	12.583 \| good	31.143 \| good	0.15 \| good	5.798 \| good	0.13 \| good
2025-12-27T14:00:00.000Z	30 \| good	3.17 \| good	6.211 \| good	32.365 \| good	0.22 \| good	5.713 \| good	0.159 \| good
2025-12-27T15:00:00.000Z	31 \| good	3.265 \| good	11.51 \| good	32.927 \| good	0.17 \| good	5.081 \| good	0.159 \| good
2025-12-27T16:00:00.000Z	30 \| good	3.42 \| good	8.55 \| good	31.999 \| good	0.162 \| good	4.687 \| good	0.166 \| good
2025-12-27T17:00:00.000Z	31 \| good	3.489 \| good	7.723 \| good	32.6 \| good	0.162 \| good	5.073 \| good	0.173 \| good
2025-12-27T18:00:00.000Z	31 \| good	3.554 \| good	13.987 \| good	34.265 \| good	0.17 \| good	5.36 \| good	0.145 \| good
2025-12-27T19:00:00.000Z	32 \| good	3.008 \| good	5.331 \| good	34.609 \| good	0.17 \| good	5.314 \| good	0.145 \| good
2025-12-27T20:00:00.000Z	32 \| good	3.783 \| good	5.223 \| good	35.241 \| good	0.17 \| good	5.256 \| good	0.137 \| good
2025-12-27T21:00:00.000Z	31 \| good	4.633 \| good	18.646 \| good	34.25 \| good	0.17 \| good	4.388 \| good	0.137 \| good
2025-12-27T22:00:00.000Z	31 \| good	3.876 \| good	8.46 \| good	33.905 \| good	0.168 \| good	7.564 \| good	0.188 \| good
2025-12-27T23:00:00.000Z	30 \| good	5.421 \| good	27.187 \| good	31.734 \| good	0.202 \| good	6.955 \| good	0.266 \| good
2025-12-28T00:00:00.000Z	29 \| good	5.443 \| good	15.169 \| good	30.621 \| good	0.223 \| good	12.633 \| good	0.315 \| good
2025-12-28T01:00:00.000Z	33 \| good	6.02 \| good	11.501 \| good	31.477 \| good	0.312 \| good	12.043 \| good	0.352 \| good
2025-12-28T02:00:00.000Z	33 \| good	5.672 \| good	26.836 \| good	30.842 \| good	0.35 \| good	13.37 \| good	0.402 \| good
2025-12-28T03:00:00.000Z	38 \| good	7.026 \| good	30.772 \| good	24.647 \| good	1.181 \| good	9.801 \| good	0.219 \| good
2025-12-28T04:00:00.000Z	29 \| good	5.084 \| good	15.107 \| good	30.898 \| good	0.366 \| good	12.47 \| good	0.383 \| good
2025-12-28T05:00:00.000Z	29 \| good	4.716 \| good	17.191 \| good	30.73 \| good	0.223 \| good	18.592 \| good	0.424 \| good
2025-12-28T06:00:00.000Z	29 \| good	5.17 \| good	8.779 \| good	30.99 \| good	0.389 \| good	21.335 \| good	0.286 \| good
2025-12-28T07:00:00.000Z	29 \| good	5.133 \| good	27.261 \| good	30.612 \| good	0.362 \| good	23.721 \| good	0.298 \| good
2025-12-28T08:00:00.000Z	38 \| good	7.427 \| good	37.208 \| good	30.907 \| good	0.27 \| good	24.406 \| good	0.255 \| good
2025-12-28T09:00:00.000Z	54 \| moderate	10.796 \| good	26.791 \| good	30.293 \| good	0.366 \| good	14.341 \| good	0.305 \| good
2025-12-28T10:00:00.000Z	38 \| good	6.764 \| good	27.753 \| good	27.635 \| good	0.361 \| good	20.568 \| good	0.345 \| good
2025-12-28T11:00:00.000Z	49 \| good	8.902 \| good	34.277 \| good	29.505 \| good	0.268 \| good	23.747 \| good	0.272 \| good
2025-12-28T12:00:00.000Z	44 \| good	7.832 \| good	26.075 \| good	29.517 \| good	0.263 \| good	32.084 \| good	0.292 \| good
2025-12-28T13:00:00.000Z	52 \| moderate	10.204 \| good	40.511 \| good	24.575 \| good	0.262 \| good	28.669 \| good	0.292 \| good
2025-12-28T14:00:00.000Z	38 \| good	7.244 \| good	25.441 \| good	25.984 \| good	0.273 \| good	27.412 \| good	0.368 \| good
2025-12-28T15:00:00.000Z	38 \| good	6.538 \| good	23.146 \| good	34.582 \| good	0.203 \| good	12.211 \| good	0.25 \| good
2025-12-28T16:00:00.000Z	38 \| good	6.887 \| good	28.452 \| good	35.95 \| good	0.188 \| good	11.446 \| good	0.2 \| good
2025-12-28T17:00:00.000Z	44 \| good	7.954 \| good	21.194 \| good	32.027 \| good	0.181 \| good	7.868 \| good	0.179 \| good
2025-12-28T18:00:00.000Z	38 \| good	7.096 \| good	28.033 \| good	36.736 \| good	0.199 \| good	11.066 \| good	0.179 \| good
2025-12-28T19:00:00.000Z	38 \| good	7.07 \| good	18.026 \| good	35.579 \| good	0.192 \| good	8.831 \| good	0.221 \| good
2025-12-28T20:00:00.000Z	38 \| good	7.007 \| good	17.806 \| good	37.309 \| good	0.218 \| good	10.635 \| good	0.242 \| good
2025-12-28T21:00:00.000Z	38 \| good	6.818 \| good	19.246 \| good	37.216 \| good	0.223 \| good	12.024 \| good	0.27 \| good
2025-12-28T22:00:00.000Z	33 \| good	6.439 \| good	25.123 \| good	36.437 \| good	0.25 \| good	21.305 \| good	0.335 \| good
2025-12-28T23:00:00.000Z	38 \| good	6.82 \| good	33.892 \| good	37.136 \| good	0.222 \| good	25.949 \| good	0.328 \| good
2025-12-29T00:00:00.000Z	44 \| good	7.835 \| good	29.132 \| good	31.988 \| good	0.284 \| good	17.843 \| good	0.287 \| good
2025-12-29T01:00:00.000Z	60 \| moderate	13.602 \| fine	53.495 \| good	21.346 \| good	0.188 \| good	26.282 \| good	0.244 \| good
2025-12-29T02:00:00.000Z	64 \| moderate	15.678 \| fine	31.175 \| good	18.088 \| good	0.176 \| good	26.779 \| good	0.244 \| good
2025-12-29T03:00:00.000Z	64 \| moderate	16.006 \| fine	71.197 \| fine	15.801 \| good	2.41 \| good	23.364 \| good	0.247 \| good
2025-12-29T04:00:00.000Z	66 \| moderate	16.858 \| fine	40.929 \| good	18.708 \| good	0.219 \| good	25.28 \| good	0.285 \| good
2025-12-29T05:00:00.000Z	64 \| moderate	15.771 \| fine	35.998 \| good	13.517 \| good	0.271 \| good	16.631 \| good	0.293 \| good
2025-12-29T06:00:00.000Z	52 \| moderate	9.674 \| good	38.831 \| good	12.365 \| good	0.238 \| good	13.764 \| good	0.23 \| good
2025-12-29T07:00:00.000Z	56 \| moderate	11.586 \| good	21.205 \| good	16.154 \| good	0.258 \| good	16.267 \| good	0.244 \| good
2025-12-29T08:00:00.000Z	56 \| moderate	11.586 \| good	21.205 \| good	16.154 \| good	0.258 \| good	16.267 \| good	0.244 \| good
2025-12-29T08:00:00.000Z	29 \| good	3.12 \| good	13.207 \| good	31.048 \| good	1.009 \| good	7.527 \| good	0.165 \| good
2025-12-29T09:00:00.000Z	31 \| good	2.901 \| good	11.961 \| good	33.542 \| good	0.965 \| good	5.075 \| good	0.155 \| good
2025-12-29T10:00:00.000Z	31 \| good	2.32 \| good	9.591 \| good	33.743 \| good	1.042 \| good	5.211 \| good	0.158 \| good
2025-12-29T11:00:00.000Z	31 \| good	2.152 \| good	8.672 \| good	33.891 \| good	1.118 \| good	5.348 \| good	0.162 \| good
2025-12-29T12:00:00.000Z	31 \| good	2.361 \| good	9.497 \| good	32.913 \| good	1.195 \| good	5.484 \| good	0.166 \| good
2025-12-29T13:00:00.000Z	31 \| good	1.998 \| good	8.225 \| good	32.559 \| good	1.26 \| good	6.625 \| good	0.175 \| good
2025-12-29T14:00:00.000Z	28 \| good	3.313 \| good	14.42 \| good	29.575 \| good	1.326 \| good	7.766 \| good	0.185 \| good
2025-12-29T15:00:00.000Z	27 \| good	5.026 \| good	21.693 \| good	27.2 \| good	1.391 \| good	8.907 \| good	0.195 \| good
2025-12-29T16:00:00.000Z	33 \| good	6.093 \| good	27.112 \| good	24.925 \| good	1.378 \| good	9.588 \| good	0.2 \| good
2025-12-29T17:00:00.000Z	27 \| good	4.983 \| good	21.676 \| good	28.171 \| good	1.364 \| good	10.27 \| good	0.205 \| good
2025-12-29T18:00:00.000Z	33 \| good	2.205 \| good	8.963 \| good	35.588 \| good	1.351 \| good	10.952 \| good	0.209 \| good
2025-12-29T19:00:00.000Z	37 \| good	0.823 \| good	3.184 \| good	40.044 \| good	1.306 \| good	8.198 \| good	0.19 \| good
2025-12-29T20:00:00.000Z	36 \| good	0.443 \| good	1.591 \| good	38.847 \| good	1.261 \| good	5.444 \| good	0.17 \| good
2025-12-29T21:00:00.000Z	34 \| good	1.391 \| good	5.591 \| good	36.722 \| good	1.216 \| good	2.69 \| good	0.151 \| good
2025-12-29T22:00:00.000Z	29 \| good	2.739 \| good	11.296 \| good	31.315 \| good	1.039 \| good	2.475 \| good	0.16 \| good
2025-12-29T23:00:00.000Z	28 \| good	2.679 \| good	10.938 \| good	30.372 \| good	0.862 \| good	2.259 \| good	0.168 \| good
2025-12-30T00:00:00.000Z	22 \| good	2.539 \| good	10.232 \| good	24.443 \| good	0.685 \| good	2.044 \| good	0.177 \| good
2025-12-30T01:00:00.000Z	20 \| good	2.227 \| good	9.221 \| good	22.134 \| good	0.576 \| good	1.952 \| good	0.17 \| good
2025-12-30T02:00:00.000Z	19 \| good	2.59 \| good	10.594 \| good	21.2 \| good	0.467 \| good	1.86 \| good	0.164 \| good
2025-12-30T03:00:00.000Z	21 \| good	1.837 \| good	7.504 \| good	22.571 \| good	0.358 \| good	1.769 \| good	0.157 \| good
2025-12-30T04:00:00.000Z	23 \| good	1.383 \| good	5.666 \| good	24.67 \| good	0.322 \| good	1.492 \| good	0.151 \| good
2025-12-30T05:00:00.000Z	26 \| good	1.183 \| good	4.89 \| good	27.799 \| good	0.286 \| good	1.215 \| good	0.144 \| good
2025-12-30T06:00:00.000Z	28 \| good	1.134 \| good	4.826 \| good	29.759 \| good	0.25 \| good	0.938 \| good	0.137 \| good
2025-12-30T07:00:00.000Z	28 \| good	0.946 \| good	3.859 \| good	29.896 \| good	0.251 \| good	0.909 \| good	0.137 \| good
2025-12-30T08:00:00.000Z	30 \| good	0.546 \| good	2 \| good	31.866 \| good	0.252 \| good	0.881 \| good	0.136 \| good
2025-12-30T09:00:00.000Z	31 \| good	0.186 \| good	0.381 \| good	33.364 \| good	0.252 \| good	0.852 \| good	0.135 \| good
2025-12-30T10:00:00.000Z	32 \| good	0.201 \| good	0.577 \| good	35.249 \| good	0.259 \| good	0.922 \| good	0.137 \| good
2025-12-30T11:00:00.000Z	32 \| good	0.059 \| good	0 \| good	35.154 \| good	0.265 \| good	0.992 \| good	0.139 \| good
2025-12-30T12:00:00.000Z	32 \| good	0.279 \| good	0.914 \| good	35.093 \| good	0.271 \| good	1.063 \| good	0.141 \| good
2025-12-30T13:00:00.000Z	33 \| good	0.269 \| good	0.914 \| good	36.223 \| good	0.266 \| good	1.018 \| good	0.141 \| good
2025-12-30T14:00:00.000Z	33 \| good	0.244 \| good	0.679 \| good	36.345 \| good	0.261 \| good	0.974 \| good	0.14 \| good
2025-12-30T15:00:00.000Z	33 \| good	0.263 \| good	0.914 \| good	36.022 \| good	0.256 \| good	0.93 \| good	0.14 \| good
2025-12-30T16:00:00.000Z	33 \| good	0.277 \| good	0.914 \| good	35.931 \| good	0.253 \| good	0.917 \| good	0.138 \| good
2025-12-30T17:00:00.000Z	34 \| good	0.341 \| good	0.967 \| good	37.45 \| good	0.249 \| good	0.903 \| good	0.136 \| good
2025-12-30T18:00:00.000Z	35 \| good	0.043 \| good	0 \| good	37.641 \| good	0.245 \| good	0.89 \| good	0.134 \| good
2025-12-30T19:00:00.000Z	36 \| good	0.068 \| good	0 \| good	38.767 \| good	0.29 \| good	1.174 \| good	0.134 \| good
2025-12-30T20:00:00.000Z	36 \| good	0.375 \| good	1.486 \| good	38.999 \| good	0.335 \| good	1.458 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	36 \| good	0.382 \| good	1.687 \| good	39.018 \| good	0.38 \| good	1.742 \| good	0.134 \| good
2025-12-30T22:00:00.000Z	35 \| good	0.098 \| good	0.053 \| good	38.023 \| good	0.417 \| good	1.878 \| good	0.134 \| good
2025-12-30T23:00:00.000Z	36 \| good	0.106 \| good	0.053 \| good	38.878 \| good	0.454 \| good	2.015 \| good	0.134 \| good
2025-12-31T00:00:00.000Z	35 \| good	0.095 \| good	0.053 \| good	37.6 \| good	0.491 \| good	2.151 \| good	0.134 \| good
2025-12-31T01:00:00.000Z	33 \| good	0.149 \| good	0.161 \| good	35.809 \| good	0.453 \| good	2.005 \| good	0.132 \| good
2025-12-31T02:00:00.000Z	33 \| good	0.238 \| good	0.858 \| good	36.117 \| good	0.415 \| good	1.858 \| good	0.131 \| good
2025-12-31T03:00:00.000Z	33 \| good	0.3 \| good	1.025 \| good	36.192 \| good	0.378 \| good	1.711 \| good	0.13 \| good
2025-12-31T04:00:00.000Z	31 \| good	0.33 \| good	1.025 \| good	34.462 \| good	0.351 \| good	1.529 \| good	0.129 \| good
2025-12-31T05:00:00.000Z	31 \| good	0.353 \| good	1.064 \| good	34.139 \| good	0.325 \| good	1.348 \| good	0.128 \| good
2025-12-31T06:00:00.000Z	36 \| good	1.237 \| good	1.295 \| good	38.792 \| good	0.296 \| good	1.154 \| good	0.127 \| good
2025-12-31T07:00:00.000Z	31 \| good	0.545 \| good	2 \| good	33.089 \| good	0.303 \| good	1.119 \| good	0.127 \| good

Winchester

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Winchester, Connecticut air quality map: Track AQI near you

0.22ppm

How accurate is Connecticut, USA air quality data?

Air quality data and pollutant measurements for Connecticut, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for Winchester, Connecticut updated?

The air quality for Winchester, Connecticut is updated every hour.

When was the worst air quality at Winchester, Connecticut in the last 24 hrs?

The worst air quality in Winchester, Connecticut in the last 24 hours was observed at 04:00:00 on 2025-12-29.

When was the best air quality at Winchester, Connecticut in the last 24 hrs?

In the last 24 hrs, the best air quality in Winchester, Connecticut was observed at 07:00:00 on 2025-12-28.

What is the current air quality in Winchester, Connecticut?

The current air quality in Winchester, Connecticut is 56, categorized as Moderate based on real-time data.

What pollutant is the most common in Winchester, Connecticut?

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

What should I do if the air quality in Winchester, Connecticut is poor?

If the air quality in Winchester, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Winchester, Connecticut?

The current PM_2.5 concentration at Winchester, Connecticut is 11.586 μg/m³.

What is the current concentration of PM₁₀ in Winchester, Connecticut?

The current PM₁₀ concentration at Winchester, Connecticut is 21.205 μg/m³.

What is the current concentration of carbon monoxide (CO) in Winchester, Connecticut?

The current carbon monoxide (CO) concentration at Winchester, Connecticut is 0.244 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Winchester, Connecticut?

The current sulfur dioxide (SO₂) concentration at Winchester, Connecticut is 0.258 ppb.

What is the current concentration of ozone (O₃) in Winchester, Connecticut?

The current ozone (O₃) concentration at Winchester, Connecticut is 16.154 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Winchester, Connecticut?

The current nitrogen dioxide (NO₂) concentration at Winchester, Connecticut is 16.267 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T09:00:00.000Z	27 \| good	4.174 \| good	23.243 \| good	29.351 \| good	0.29 \| good	7.09 \| good	0.179 \| good
2025-12-27T10:00:00.000Z	27 \| good	4.098 \| good	19.472 \| good	28.886 \| good	0.218 \| good	8.111 \| good	0.137 \| good
2025-12-27T11:00:00.000Z	25 \| good	4.327 \| good	16.504 \| good	27.275 \| good	0.206 \| good	7.234 \| good	0.13 \| good
2025-12-27T12:00:00.000Z	28 \| good	3.819 \| good	10.819 \| good	30.481 \| good	0.129 \| good	7.22 \| good	0.13 \| good
2025-12-27T13:00:00.000Z	29 \| good	3.38 \| good	12.583 \| good	31.143 \| good	0.15 \| good	5.798 \| good	0.13 \| good
2025-12-27T14:00:00.000Z	30 \| good	3.17 \| good	6.211 \| good	32.365 \| good	0.22 \| good	5.713 \| good	0.159 \| good
2025-12-27T15:00:00.000Z	31 \| good	3.265 \| good	11.51 \| good	32.927 \| good	0.17 \| good	5.081 \| good	0.159 \| good
2025-12-27T16:00:00.000Z	30 \| good	3.42 \| good	8.55 \| good	31.999 \| good	0.162 \| good	4.687 \| good	0.166 \| good
2025-12-27T17:00:00.000Z	31 \| good	3.489 \| good	7.723 \| good	32.6 \| good	0.162 \| good	5.073 \| good	0.173 \| good
2025-12-27T18:00:00.000Z	31 \| good	3.554 \| good	13.987 \| good	34.265 \| good	0.17 \| good	5.36 \| good	0.145 \| good
2025-12-27T19:00:00.000Z	32 \| good	3.008 \| good	5.331 \| good	34.609 \| good	0.17 \| good	5.314 \| good	0.145 \| good
2025-12-27T20:00:00.000Z	32 \| good	3.783 \| good	5.223 \| good	35.241 \| good	0.17 \| good	5.256 \| good	0.137 \| good
2025-12-27T21:00:00.000Z	31 \| good	4.633 \| good	18.646 \| good	34.25 \| good	0.17 \| good	4.388 \| good	0.137 \| good
2025-12-27T22:00:00.000Z	31 \| good	3.876 \| good	8.46 \| good	33.905 \| good	0.168 \| good	7.564 \| good	0.188 \| good
2025-12-27T23:00:00.000Z	30 \| good	5.421 \| good	27.187 \| good	31.734 \| good	0.202 \| good	6.955 \| good	0.266 \| good
2025-12-28T00:00:00.000Z	29 \| good	5.443 \| good	15.169 \| good	30.621 \| good	0.223 \| good	12.633 \| good	0.315 \| good
2025-12-28T01:00:00.000Z	33 \| good	6.02 \| good	11.501 \| good	31.477 \| good	0.312 \| good	12.043 \| good	0.352 \| good
2025-12-28T02:00:00.000Z	33 \| good	5.672 \| good	26.836 \| good	30.842 \| good	0.35 \| good	13.37 \| good	0.402 \| good
2025-12-28T03:00:00.000Z	38 \| good	7.026 \| good	30.772 \| good	24.647 \| good	1.181 \| good	9.801 \| good	0.219 \| good
2025-12-28T04:00:00.000Z	29 \| good	5.084 \| good	15.107 \| good	30.898 \| good	0.366 \| good	12.47 \| good	0.383 \| good
2025-12-28T05:00:00.000Z	29 \| good	4.716 \| good	17.191 \| good	30.73 \| good	0.223 \| good	18.592 \| good	0.424 \| good
2025-12-28T06:00:00.000Z	29 \| good	5.17 \| good	8.779 \| good	30.99 \| good	0.389 \| good	21.335 \| good	0.286 \| good
2025-12-28T07:00:00.000Z	29 \| good	5.133 \| good	27.261 \| good	30.612 \| good	0.362 \| good	23.721 \| good	0.298 \| good
2025-12-28T08:00:00.000Z	38 \| good	7.427 \| good	37.208 \| good	30.907 \| good	0.27 \| good	24.406 \| good	0.255 \| good
2025-12-28T09:00:00.000Z	54 \| moderate	10.796 \| good	26.791 \| good	30.293 \| good	0.366 \| good	14.341 \| good	0.305 \| good
2025-12-28T10:00:00.000Z	38 \| good	6.764 \| good	27.753 \| good	27.635 \| good	0.361 \| good	20.568 \| good	0.345 \| good
2025-12-28T11:00:00.000Z	49 \| good	8.902 \| good	34.277 \| good	29.505 \| good	0.268 \| good	23.747 \| good	0.272 \| good
2025-12-28T12:00:00.000Z	44 \| good	7.832 \| good	26.075 \| good	29.517 \| good	0.263 \| good	32.084 \| good	0.292 \| good
2025-12-28T13:00:00.000Z	52 \| moderate	10.204 \| good	40.511 \| good	24.575 \| good	0.262 \| good	28.669 \| good	0.292 \| good
2025-12-28T14:00:00.000Z	38 \| good	7.244 \| good	25.441 \| good	25.984 \| good	0.273 \| good	27.412 \| good	0.368 \| good
2025-12-28T15:00:00.000Z	38 \| good	6.538 \| good	23.146 \| good	34.582 \| good	0.203 \| good	12.211 \| good	0.25 \| good
2025-12-28T16:00:00.000Z	38 \| good	6.887 \| good	28.452 \| good	35.95 \| good	0.188 \| good	11.446 \| good	0.2 \| good
2025-12-28T17:00:00.000Z	44 \| good	7.954 \| good	21.194 \| good	32.027 \| good	0.181 \| good	7.868 \| good	0.179 \| good
2025-12-28T18:00:00.000Z	38 \| good	7.096 \| good	28.033 \| good	36.736 \| good	0.199 \| good	11.066 \| good	0.179 \| good
2025-12-28T19:00:00.000Z	38 \| good	7.07 \| good	18.026 \| good	35.579 \| good	0.192 \| good	8.831 \| good	0.221 \| good
2025-12-28T20:00:00.000Z	38 \| good	7.007 \| good	17.806 \| good	37.309 \| good	0.218 \| good	10.635 \| good	0.242 \| good
2025-12-28T21:00:00.000Z	38 \| good	6.818 \| good	19.246 \| good	37.216 \| good	0.223 \| good	12.024 \| good	0.27 \| good
2025-12-28T22:00:00.000Z	33 \| good	6.439 \| good	25.123 \| good	36.437 \| good	0.25 \| good	21.305 \| good	0.335 \| good
2025-12-28T23:00:00.000Z	38 \| good	6.82 \| good	33.892 \| good	37.136 \| good	0.222 \| good	25.949 \| good	0.328 \| good
2025-12-29T00:00:00.000Z	44 \| good	7.835 \| good	29.132 \| good	31.988 \| good	0.284 \| good	17.843 \| good	0.287 \| good
2025-12-29T01:00:00.000Z	60 \| moderate	13.602 \| fine	53.495 \| good	21.346 \| good	0.188 \| good	26.282 \| good	0.244 \| good
2025-12-29T02:00:00.000Z	64 \| moderate	15.678 \| fine	31.175 \| good	18.088 \| good	0.176 \| good	26.779 \| good	0.244 \| good
2025-12-29T03:00:00.000Z	64 \| moderate	16.006 \| fine	71.197 \| fine	15.801 \| good	2.41 \| good	23.364 \| good	0.247 \| good
2025-12-29T04:00:00.000Z	66 \| moderate	16.858 \| fine	40.929 \| good	18.708 \| good	0.219 \| good	25.28 \| good	0.285 \| good
2025-12-29T05:00:00.000Z	64 \| moderate	15.771 \| fine	35.998 \| good	13.517 \| good	0.271 \| good	16.631 \| good	0.293 \| good
2025-12-29T06:00:00.000Z	52 \| moderate	9.674 \| good	38.831 \| good	12.365 \| good	0.238 \| good	13.764 \| good	0.23 \| good
2025-12-29T07:00:00.000Z	56 \| moderate	11.586 \| good	21.205 \| good	16.154 \| good	0.258 \| good	16.267 \| good	0.244 \| good
2025-12-29T08:00:00.000Z	56 \| moderate	11.586 \| good	21.205 \| good	16.154 \| good	0.258 \| good	16.267 \| good	0.244 \| good
2025-12-29T08:00:00.000Z	29 \| good	3.12 \| good	13.207 \| good	31.048 \| good	1.009 \| good	7.527 \| good	0.165 \| good
2025-12-29T09:00:00.000Z	31 \| good	2.901 \| good	11.961 \| good	33.542 \| good	0.965 \| good	5.075 \| good	0.155 \| good
2025-12-29T10:00:00.000Z	31 \| good	2.32 \| good	9.591 \| good	33.743 \| good	1.042 \| good	5.211 \| good	0.158 \| good
2025-12-29T11:00:00.000Z	31 \| good	2.152 \| good	8.672 \| good	33.891 \| good	1.118 \| good	5.348 \| good	0.162 \| good
2025-12-29T12:00:00.000Z	31 \| good	2.361 \| good	9.497 \| good	32.913 \| good	1.195 \| good	5.484 \| good	0.166 \| good
2025-12-29T13:00:00.000Z	31 \| good	1.998 \| good	8.225 \| good	32.559 \| good	1.26 \| good	6.625 \| good	0.175 \| good
2025-12-29T14:00:00.000Z	28 \| good	3.313 \| good	14.42 \| good	29.575 \| good	1.326 \| good	7.766 \| good	0.185 \| good
2025-12-29T15:00:00.000Z	27 \| good	5.026 \| good	21.693 \| good	27.2 \| good	1.391 \| good	8.907 \| good	0.195 \| good
2025-12-29T16:00:00.000Z	33 \| good	6.093 \| good	27.112 \| good	24.925 \| good	1.378 \| good	9.588 \| good	0.2 \| good
2025-12-29T17:00:00.000Z	27 \| good	4.983 \| good	21.676 \| good	28.171 \| good	1.364 \| good	10.27 \| good	0.205 \| good
2025-12-29T18:00:00.000Z	33 \| good	2.205 \| good	8.963 \| good	35.588 \| good	1.351 \| good	10.952 \| good	0.209 \| good
2025-12-29T19:00:00.000Z	37 \| good	0.823 \| good	3.184 \| good	40.044 \| good	1.306 \| good	8.198 \| good	0.19 \| good
2025-12-29T20:00:00.000Z	36 \| good	0.443 \| good	1.591 \| good	38.847 \| good	1.261 \| good	5.444 \| good	0.17 \| good
2025-12-29T21:00:00.000Z	34 \| good	1.391 \| good	5.591 \| good	36.722 \| good	1.216 \| good	2.69 \| good	0.151 \| good
2025-12-29T22:00:00.000Z	29 \| good	2.739 \| good	11.296 \| good	31.315 \| good	1.039 \| good	2.475 \| good	0.16 \| good
2025-12-29T23:00:00.000Z	28 \| good	2.679 \| good	10.938 \| good	30.372 \| good	0.862 \| good	2.259 \| good	0.168 \| good
2025-12-30T00:00:00.000Z	22 \| good	2.539 \| good	10.232 \| good	24.443 \| good	0.685 \| good	2.044 \| good	0.177 \| good
2025-12-30T01:00:00.000Z	20 \| good	2.227 \| good	9.221 \| good	22.134 \| good	0.576 \| good	1.952 \| good	0.17 \| good
2025-12-30T02:00:00.000Z	19 \| good	2.59 \| good	10.594 \| good	21.2 \| good	0.467 \| good	1.86 \| good	0.164 \| good
2025-12-30T03:00:00.000Z	21 \| good	1.837 \| good	7.504 \| good	22.571 \| good	0.358 \| good	1.769 \| good	0.157 \| good
2025-12-30T04:00:00.000Z	23 \| good	1.383 \| good	5.666 \| good	24.67 \| good	0.322 \| good	1.492 \| good	0.151 \| good
2025-12-30T05:00:00.000Z	26 \| good	1.183 \| good	4.89 \| good	27.799 \| good	0.286 \| good	1.215 \| good	0.144 \| good
2025-12-30T06:00:00.000Z	28 \| good	1.134 \| good	4.826 \| good	29.759 \| good	0.25 \| good	0.938 \| good	0.137 \| good
2025-12-30T07:00:00.000Z	28 \| good	0.946 \| good	3.859 \| good	29.896 \| good	0.251 \| good	0.909 \| good	0.137 \| good
2025-12-30T08:00:00.000Z	30 \| good	0.546 \| good	2 \| good	31.866 \| good	0.252 \| good	0.881 \| good	0.136 \| good
2025-12-30T09:00:00.000Z	31 \| good	0.186 \| good	0.381 \| good	33.364 \| good	0.252 \| good	0.852 \| good	0.135 \| good
2025-12-30T10:00:00.000Z	32 \| good	0.201 \| good	0.577 \| good	35.249 \| good	0.259 \| good	0.922 \| good	0.137 \| good
2025-12-30T11:00:00.000Z	32 \| good	0.059 \| good	0 \| good	35.154 \| good	0.265 \| good	0.992 \| good	0.139 \| good
2025-12-30T12:00:00.000Z	32 \| good	0.279 \| good	0.914 \| good	35.093 \| good	0.271 \| good	1.063 \| good	0.141 \| good
2025-12-30T13:00:00.000Z	33 \| good	0.269 \| good	0.914 \| good	36.223 \| good	0.266 \| good	1.018 \| good	0.141 \| good
2025-12-30T14:00:00.000Z	33 \| good	0.244 \| good	0.679 \| good	36.345 \| good	0.261 \| good	0.974 \| good	0.14 \| good
2025-12-30T15:00:00.000Z	33 \| good	0.263 \| good	0.914 \| good	36.022 \| good	0.256 \| good	0.93 \| good	0.14 \| good
2025-12-30T16:00:00.000Z	33 \| good	0.277 \| good	0.914 \| good	35.931 \| good	0.253 \| good	0.917 \| good	0.138 \| good
2025-12-30T17:00:00.000Z	34 \| good	0.341 \| good	0.967 \| good	37.45 \| good	0.249 \| good	0.903 \| good	0.136 \| good
2025-12-30T18:00:00.000Z	35 \| good	0.043 \| good	0 \| good	37.641 \| good	0.245 \| good	0.89 \| good	0.134 \| good
2025-12-30T19:00:00.000Z	36 \| good	0.068 \| good	0 \| good	38.767 \| good	0.29 \| good	1.174 \| good	0.134 \| good
2025-12-30T20:00:00.000Z	36 \| good	0.375 \| good	1.486 \| good	38.999 \| good	0.335 \| good	1.458 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	36 \| good	0.382 \| good	1.687 \| good	39.018 \| good	0.38 \| good	1.742 \| good	0.134 \| good
2025-12-30T22:00:00.000Z	35 \| good	0.098 \| good	0.053 \| good	38.023 \| good	0.417 \| good	1.878 \| good	0.134 \| good
2025-12-30T23:00:00.000Z	36 \| good	0.106 \| good	0.053 \| good	38.878 \| good	0.454 \| good	2.015 \| good	0.134 \| good
2025-12-31T00:00:00.000Z	35 \| good	0.095 \| good	0.053 \| good	37.6 \| good	0.491 \| good	2.151 \| good	0.134 \| good
2025-12-31T01:00:00.000Z	33 \| good	0.149 \| good	0.161 \| good	35.809 \| good	0.453 \| good	2.005 \| good	0.132 \| good
2025-12-31T02:00:00.000Z	33 \| good	0.238 \| good	0.858 \| good	36.117 \| good	0.415 \| good	1.858 \| good	0.131 \| good
2025-12-31T03:00:00.000Z	33 \| good	0.3 \| good	1.025 \| good	36.192 \| good	0.378 \| good	1.711 \| good	0.13 \| good
2025-12-31T04:00:00.000Z	31 \| good	0.33 \| good	1.025 \| good	34.462 \| good	0.351 \| good	1.529 \| good	0.129 \| good
2025-12-31T05:00:00.000Z	31 \| good	0.353 \| good	1.064 \| good	34.139 \| good	0.325 \| good	1.348 \| good	0.128 \| good
2025-12-31T06:00:00.000Z	36 \| good	1.237 \| good	1.295 \| good	38.792 \| good	0.296 \| good	1.154 \| good	0.127 \| good
2025-12-31T07:00:00.000Z	31 \| good	0.545 \| good	2 \| good	33.089 \| good	0.303 \| good	1.119 \| good	0.127 \| good

Winchester, Connecticut live air quality index now

Major air pollutants in Winchester, Connecticut

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Winchester, Connecticut air quality map: Track AQI near you

Air quality in nearby cities

Torrington, Connecticut

Canton, Connecticut

Plymouth, Connecticut

Avon, Connecticut

Simsbury, Connecticut

Granby, Connecticut

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Frequently asked questions

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What is the current air quality in Winchester, Connecticut?

What pollutant is the most common in Winchester, Connecticut?

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What is the current concentration of PM2.5 in Winchester, Connecticut?

What is the current concentration of PM10 in Winchester, Connecticut?

What is the current concentration of carbon monoxide (CO) in Winchester, Connecticut?

What is the current concentration of sulfur dioxide (SO2) in Winchester, Connecticut?

What is the current concentration of ozone (O3) in Winchester, Connecticut?

What is the current concentration of nitrogen dioxide (NO2) in Winchester, Connecticut?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the current concentration of PM_2.5 in Winchester, Connecticut?

What is the current concentration of PM₁₀ in Winchester, Connecticut?

What is the current concentration of sulfur dioxide (SO₂) in Winchester, Connecticut?

What is the current concentration of ozone (O₃) in Winchester, Connecticut?

What is the current concentration of nitrogen dioxide (NO₂) in Winchester, Connecticut?