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

Currently, Stonington, Connecticut has a sulfur dioxide (SO2) concentration of 0.218 ppb.

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

The current ozone (O3) level in Stonington, Connecticut at the moment is 28.196 ppm.

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

Nitrogen dioxide (NO2) level in Stonington, Connecticut at the moment is 9.239 ppb.

Live air quality index in Stonington, Connecticut today

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

Stay updated with real-time air quality in Stonington, 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

Stonington, Connecticut

Last updated: ... (Local time)

Major air pollutants in Stonington, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

9.72 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

43.26 μg/m³

155

255

425

605+

Ozone (O₃)

56.51 ppb

201

201+

Sulfur Dioxide (SO₂)

0.27 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

7.75 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.25 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Stonington, Connecticut

Get Live Pollen Counts

Stonington, Connecticut

Scroll To Air Quality Map

Track live Stonington, Connecticut air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-28T20:00:00.000Z	64 \| moderate	15.903 \| fine	42.091 \| good	41.934 \| good	0.177 \| good	9.806 \| good	0.273 \| good
2025-07-28T21:00:00.000Z	60 \| moderate	13.852 \| fine	26.747 \| good	45.259 \| good	0.171 \| good	4.487 \| good	0.308 \| good
2025-07-28T22:00:00.000Z	56 \| moderate	11.635 \| good	28.133 \| good	46.389 \| good	0.193 \| good	3.802 \| good	0.306 \| good
2025-07-28T23:00:00.000Z	64 \| moderate	16.064 \| fine	29.175 \| good	45.678 \| good	0.195 \| good	3.346 \| good	0.306 \| good
2025-07-29T00:00:00.000Z	60 \| moderate	14.417 \| fine	29.491 \| good	42.649 \| good	0.271 \| good	2.997 \| good	0.305 \| good
2025-07-29T01:00:00.000Z	58 \| moderate	13.365 \| fine	33.181 \| good	42.474 \| good	0.182 \| good	4.466 \| good	0.35 \| good
2025-07-29T02:00:00.000Z	60 \| moderate	14.492 \| fine	50.049 \| good	38.904 \| good	0.26 \| good	5.898 \| good	0.332 \| good
2025-07-29T03:00:00.000Z	62 \| moderate	14.542 \| fine	43.302 \| good	40.585 \| good	0.252 \| good	7.61 \| good	0.37 \| good
2025-07-29T04:00:00.000Z	64 \| moderate	16.325 \| fine	33.597 \| good	34.189 \| good	0.248 \| good	6.423 \| good	0.427 \| good
2025-07-29T05:00:00.000Z	64 \| moderate	15.927 \| fine	32.367 \| good	33.486 \| good	0.761 \| good	7.627 \| good	0.297 \| good
2025-07-29T06:00:00.000Z	67 \| moderate	18.106 \| fine	29.219 \| good	28.716 \| good	0.783 \| good	6.994 \| good	0.317 \| good
2025-07-29T07:00:00.000Z	67 \| moderate	17.954 \| fine	28.913 \| good	28.517 \| good	0.303 \| good	6.439 \| good	0.321 \| good
2025-07-29T08:00:00.000Z	62 \| moderate	15.217 \| fine	45.339 \| good	30.405 \| good	0.251 \| good	5.991 \| good	0.321 \| good
2025-07-29T09:00:00.000Z	60 \| moderate	14.246 \| fine	33.413 \| good	29.631 \| good	0.164 \| good	8.577 \| good	0.351 \| good
2025-07-29T10:00:00.000Z	60 \| moderate	13.923 \| fine	43.328 \| good	23.139 \| good	0.143 \| good	11.382 \| good	0.41 \| good
2025-07-29T11:00:00.000Z	64 \| moderate	15.503 \| fine	53.076 \| good	23.298 \| good	0.178 \| good	11.612 \| good	0.443 \| good
2025-07-29T12:00:00.000Z	60 \| moderate	13.578 \| fine	44.89 \| good	26.118 \| good	0.218 \| good	11.59 \| good	0.514 \| good
2025-07-29T13:00:00.000Z	58 \| moderate	13.419 \| fine	35.547 \| good	26.025 \| good	0.222 \| good	12.533 \| good	0.524 \| good
2025-07-29T14:00:00.000Z	58 \| moderate	12.595 \| fine	34.756 \| good	31.011 \| good	0.203 \| good	12.321 \| good	0.422 \| good
2025-07-29T15:00:00.000Z	60 \| moderate	13.809 \| fine	54.445 \| good	33.574 \| good	0.44 \| good	25.243 \| good	0.382 \| good
2025-07-29T16:00:00.000Z	56 \| moderate	12.469 \| fine	43.789 \| good	36.267 \| good	0.421 \| good	18.597 \| good	0.338 \| good
2025-07-29T17:00:00.000Z	58 \| moderate	13.01 \| fine	46.183 \| good	45.948 \| good	0.327 \| good	14.714 \| good	0.339 \| good
2025-07-29T18:00:00.000Z	58 \| moderate	13.447 \| fine	55.484 \| fine	52.889 \| good	0.257 \| good	9.028 \| good	0.405 \| good
2025-07-29T19:00:00.000Z	90 \| moderate	15.516 \| fine	44.321 \| good	67.004 \| fine	0.279 \| good	8.952 \| good	0.325 \| good
2025-07-29T20:00:00.000Z	84 \| moderate	14.649 \| fine	28.398 \| good	65.248 \| fine	0.368 \| good	17.868 \| good	0.341 \| good
2025-07-29T21:00:00.000Z	100 \| moderate	12.033 \| good	36.418 \| good	70.336 \| fine	0.411 \| good	15.822 \| good	0.308 \| good
2025-07-29T22:00:00.000Z	84 \| moderate	12.705 \| fine	46.947 \| good	65.073 \| fine	0.332 \| good	4.822 \| good	0.308 \| good
2025-07-29T23:00:00.000Z	74 \| moderate	11.526 \| good	26.393 \| good	61.648 \| fine	0.355 \| good	4.295 \| good	0.308 \| good
2025-07-30T00:00:00.000Z	100 \| moderate	13.233 \| fine	26.557 \| good	70.359 \| fine	0.336 \| good	6.209 \| good	0.341 \| good
2025-07-30T01:00:00.000Z	74 \| moderate	13.01 \| fine	29.798 \| good	62.009 \| fine	0.301 \| good	6.04 \| good	0.288 \| good
2025-07-30T02:00:00.000Z	84 \| moderate	12.083 \| good	39.804 \| good	65.297 \| fine	0.184 \| good	8.145 \| good	0.358 \| good
2025-07-30T03:00:00.000Z	77 \| moderate	23.429 \| fine	103 \| fine	43.972 \| good	0.7 \| good	5.922 \| good	0.282 \| good
2025-07-30T04:00:00.000Z	54 \| moderate	11.096 \| good	37.821 \| good	53.381 \| good	0.265 \| good	10.827 \| good	0.37 \| good
2025-07-30T05:00:00.000Z	58 \| moderate	12.875 \| fine	23.696 \| good	46.425 \| good	0.443 \| good	14.277 \| good	0.325 \| good
2025-07-30T06:00:00.000Z	56 \| moderate	12.351 \| fine	49.37 \| good	40.494 \| good	0.364 \| good	18.589 \| good	0.273 \| good
2025-07-30T07:00:00.000Z	58 \| moderate	12.86 \| fine	27.909 \| good	32.44 \| good	0.228 \| good	14.363 \| good	0.259 \| good
2025-07-30T08:00:00.000Z	56 \| moderate	12.037 \| good	32.265 \| good	33.712 \| good	0.375 \| good	15.128 \| good	0.259 \| good
2025-07-30T09:00:00.000Z	58 \| moderate	12.859 \| fine	34.546 \| good	41.102 \| good	0.27 \| good	13.575 \| good	0.249 \| good
2025-07-30T10:00:00.000Z	56 \| moderate	11.936 \| good	33.815 \| good	36.044 \| good	0.204 \| good	10.797 \| good	0.335 \| good
2025-07-30T11:00:00.000Z	56 \| moderate	11.735 \| good	23.566 \| good	33.47 \| good	0.183 \| good	19.668 \| good	0.357 \| good
2025-07-30T12:00:00.000Z	52 \| moderate	10.064 \| good	35.771 \| good	24.695 \| good	0.201 \| good	12.982 \| good	0.347 \| good
2025-07-30T13:00:00.000Z	49 \| good	9.185 \| good	26.384 \| good	28.196 \| good	0.218 \| good	9.239 \| good	0.295 \| good
2025-07-30T14:00:00.000Z	52 \| moderate	9.673 \| good	32.327 \| good	30.929 \| good	0.176 \| good	7.18 \| good	0.261 \| good
2025-07-30T15:00:00.000Z	52 \| moderate	9.801 \| good	29.28 \| good	37.832 \| good	0.234 \| good	8.717 \| good	0.297 \| good
2025-07-30T16:00:00.000Z	52 \| moderate	10.034 \| good	31.59 \| good	37.723 \| good	0.271 \| good	10.494 \| good	0.261 \| good
2025-07-30T17:00:00.000Z	52 \| moderate	9.738 \| good	21.263 \| good	44.62 \| good	0.272 \| good	8.589 \| good	0.275 \| good
2025-07-30T18:00:00.000Z	49 \| good	9.455 \| good	26.624 \| good	50.166 \| good	0.264 \| good	6.682 \| good	0.237 \| good
2025-07-30T19:00:00.000Z	58 \| moderate	9.723 \| good	43.258 \| good	56.509 \| fine	0.27 \| good	7.751 \| good	0.249 \| good
2025-07-30T19:00:00.000Z	58 \| moderate	9.723 \| good	43.258 \| good	56.509 \| fine	0.27 \| good	7.751 \| good	0.249 \| good
2025-07-30T14:00:00.000Z	60 \| moderate	14.447 \| fine	65.078 \| fine	42.913 \| good	0.725 \| good	4.422 \| good	0.297 \| good
2025-07-30T15:00:00.000Z	60 \| moderate	13.81 \| fine	61.89 \| fine	47.714 \| good	0.751 \| good	3.833 \| good	0.304 \| good
2025-07-30T16:00:00.000Z	60 \| moderate	14.037 \| fine	63.269 \| fine	53.91 \| good	0.711 \| good	3.188 \| good	0.298 \| good
2025-07-30T17:00:00.000Z	64 \| moderate	14.864 \| fine	66.693 \| fine	58.951 \| fine	0.671 \| good	2.543 \| good	0.292 \| good
2025-07-30T18:00:00.000Z	64 \| moderate	13.981 \| fine	62.47 \| fine	59.439 \| fine	0.63 \| good	1.898 \| good	0.286 \| good
2025-07-30T19:00:00.000Z	58 \| moderate	13.115 \| fine	59.529 \| fine	51.936 \| good	0.794 \| good	2.069 \| good	0.275 \| good
2025-07-30T20:00:00.000Z	62 \| moderate	15.311 \| fine	67.912 \| fine	53.163 \| good	0.957 \| good	2.24 \| good	0.264 \| good
2025-07-30T21:00:00.000Z	119 \| sensitive	21.627 \| fine	95.006 \| fine	76.414 \| moderate	1.12 \| good	2.411 \| good	0.253 \| good
2025-07-30T22:00:00.000Z	140 \| sensitive	26.121 \| fine	113.664 \| fine	82.257 \| moderate	1.109 \| good	3.632 \| good	0.255 \| good
2025-07-30T23:00:00.000Z	122 \| sensitive	24.538 \| fine	106.991 \| fine	77.241 \| moderate	1.098 \| good	4.854 \| good	0.257 \| good
2025-07-31T00:00:00.000Z	81 \| moderate	25.216 \| fine	110.064 \| fine	59.741 \| fine	1.088 \| good	6.076 \| good	0.259 \| good
2025-07-31T01:00:00.000Z	77 \| moderate	22.734 \| fine	100.189 \| fine	50.118 \| good	1.044 \| good	6.071 \| good	0.254 \| good
2025-07-31T02:00:00.000Z	75 \| moderate	22.185 \| fine	97.531 \| fine	43.863 \| good	1.001 \| good	6.066 \| good	0.249 \| good
2025-07-31T03:00:00.000Z	75 \| moderate	21.831 \| fine	95.446 \| fine	44.141 \| good	0.957 \| good	6.062 \| good	0.244 \| good
2025-07-31T04:00:00.000Z	69 \| moderate	19.43 \| fine	86.081 \| fine	43.342 \| good	0.902 \| good	5.829 \| good	0.24 \| good
2025-07-31T05:00:00.000Z	69 \| moderate	18.698 \| fine	82.497 \| fine	39.892 \| good	0.846 \| good	5.595 \| good	0.236 \| good
2025-07-31T06:00:00.000Z	66 \| moderate	17.358 \| fine	76.866 \| fine	32.526 \| good	0.791 \| good	5.362 \| good	0.232 \| good
2025-07-31T07:00:00.000Z	66 \| moderate	17.474 \| fine	77.069 \| fine	31.259 \| good	0.71 \| good	4.767 \| good	0.23 \| good
2025-07-31T08:00:00.000Z	64 \| moderate	16.222 \| fine	72.388 \| fine	28.38 \| good	0.629 \| good	4.172 \| good	0.229 \| good
2025-07-31T09:00:00.000Z	69 \| moderate	19.43 \| fine	85.935 \| fine	24.355 \| good	0.548 \| good	3.576 \| good	0.227 \| good
2025-07-31T10:00:00.000Z	67 \| moderate	17.908 \| fine	79.16 \| fine	22.035 \| good	0.545 \| good	3.514 \| good	0.232 \| good
2025-07-31T11:00:00.000Z	67 \| moderate	18.351 \| fine	81 \| fine	21.959 \| good	0.543 \| good	3.452 \| good	0.237 \| good
2025-07-31T12:00:00.000Z	75 \| moderate	22.453 \| fine	98.132 \| fine	27.11 \| good	0.541 \| good	3.39 \| good	0.242 \| good
2025-07-31T13:00:00.000Z	75 \| moderate	22.38 \| fine	97.571 \| fine	37.725 \| good	0.513 \| good	2.945 \| good	0.244 \| good
2025-07-31T14:00:00.000Z	71 \| moderate	20.346 \| fine	89.163 \| fine	44.281 \| good	0.484 \| good	2.5 \| good	0.246 \| good
2025-07-31T15:00:00.000Z	69 \| moderate	19.021 \| fine	84.314 \| fine	46.226 \| good	0.456 \| good	2.055 \| good	0.248 \| good
2025-07-31T16:00:00.000Z	69 \| moderate	18.946 \| fine	83.792 \| fine	47.236 \| good	0.428 \| good	2.026 \| good	0.242 \| good
2025-07-31T17:00:00.000Z	69 \| moderate	18.549 \| fine	81.659 \| fine	49.606 \| good	0.4 \| good	1.996 \| good	0.236 \| good
2025-07-31T18:00:00.000Z	67 \| moderate	17.874 \| fine	78.724 \| fine	51.798 \| good	0.373 \| good	1.966 \| good	0.23 \| good
2025-07-31T19:00:00.000Z	66 \| moderate	16.783 \| fine	74.329 \| fine	44.799 \| good	0.377 \| good	2.173 \| good	0.231 \| good
2025-07-31T20:00:00.000Z	67 \| moderate	18.261 \| fine	81.013 \| fine	44.003 \| good	0.381 \| good	2.379 \| good	0.232 \| good
2025-07-31T21:00:00.000Z	62 \| moderate	15.41 \| fine	68.566 \| fine	44.039 \| good	0.384 \| good	2.586 \| good	0.233 \| good
2025-07-31T22:00:00.000Z	60 \| moderate	14.391 \| fine	64.746 \| fine	37.42 \| good	0.372 \| good	3.138 \| good	0.241 \| good
2025-07-31T23:00:00.000Z	62 \| moderate	14.805 \| fine	65.788 \| fine	27.341 \| good	0.36 \| good	3.69 \| good	0.249 \| good
2025-08-01T00:00:00.000Z	67 \| moderate	18.037 \| fine	80.166 \| fine	25.255 \| good	0.349 \| good	4.242 \| good	0.256 \| good
2025-08-01T01:00:00.000Z	69 \| moderate	18.697 \| fine	82.326 \| fine	23.367 \| good	0.373 \| good	4.033 \| good	0.257 \| good
2025-08-01T02:00:00.000Z	69 \| moderate	18.615 \| fine	82.272 \| fine	23.864 \| good	0.398 \| good	3.823 \| good	0.257 \| good
2025-08-01T03:00:00.000Z	69 \| moderate	18.807 \| fine	83.75 \| fine	23.001 \| good	0.423 \| good	3.614 \| good	0.257 \| good
2025-08-01T04:00:00.000Z	67 \| moderate	17.578 \| fine	77.914 \| fine	23.328 \| good	0.442 \| good	3.685 \| good	0.255 \| good
2025-08-01T05:00:00.000Z	64 \| moderate	16.238 \| fine	71.977 \| fine	22.288 \| good	0.46 \| good	3.756 \| good	0.252 \| good
2025-08-01T06:00:00.000Z	62 \| moderate	14.826 \| fine	66.101 \| fine	20.23 \| good	0.478 \| good	3.828 \| good	0.25 \| good
2025-08-01T07:00:00.000Z	60 \| moderate	13.932 \| fine	62.408 \| fine	21.375 \| good	0.534 \| good	3.967 \| good	0.248 \| good
2025-08-01T08:00:00.000Z	58 \| moderate	13.398 \| fine	60.329 \| fine	23.011 \| good	0.59 \| good	4.106 \| good	0.246 \| good
2025-08-01T09:00:00.000Z	58 \| moderate	12.661 \| fine	56.408 \| fine	22.048 \| good	0.646 \| good	4.246 \| good	0.244 \| good
2025-08-01T10:00:00.000Z	58 \| moderate	12.715 \| fine	57.652 \| fine	23.934 \| good	0.636 \| good	3.885 \| good	0.24 \| good
2025-08-01T11:00:00.000Z	58 \| moderate	13.147 \| fine	59.365 \| fine	24.964 \| good	0.626 \| good	3.523 \| good	0.236 \| good
2025-08-01T12:00:00.000Z	56 \| moderate	12.143 \| fine	54.229 \| good	25.71 \| good	0.616 \| good	3.162 \| good	0.232 \| good
2025-08-01T13:00:00.000Z	52 \| moderate	9.868 \| good	44.125 \| good	29.136 \| good	0.532 \| good	3.08 \| good	0.226 \| good

Stonington

Get reliable air quality data to drive your business

Stonington, Connecticut air quality map: Stay updated on AQI near you

0.33ppm

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

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Frequently asked questions

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

The air quality information for Stonington, Connecticut is updated every hour for accuracy.

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

In the past 24 hours, the air quality in Stonington, Connecticut was at its worst at 12:00:00 on 2025-07-30.

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

In the last 24 hours, the best air quality in Stonington, Connecticut was observed at 12:00:00 on 2025-07-30.

What is the AQI in Stonington, Connecticut right now?

As of now, the AQI in Stonington, Connecticut is 49, indicating Good conditions.

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

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

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

Poor air quality in Stonington, Connecticut means it's advisable to stay indoors and wear a mask for your protection.

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

PM_2.5 levels in Stonington, Connecticut are currently 9.185 μg/m³.

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

The PM₁₀ concentration in Stonington, Connecticut is 26.384 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Stonington, Connecticut is 0.295 ppm.

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

Currently, Stonington, Connecticut has a sulfur dioxide (SO₂) concentration of 0.218 ppb.

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

The current ozone (O₃) level in Stonington, Connecticut at the moment is 28.196 ppm.

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

Nitrogen dioxide (NO₂) level in Stonington, Connecticut at the moment is 9.239 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-28T20:00:00.000Z	64 \| moderate	15.903 \| fine	42.091 \| good	41.934 \| good	0.177 \| good	9.806 \| good	0.273 \| good
2025-07-28T21:00:00.000Z	60 \| moderate	13.852 \| fine	26.747 \| good	45.259 \| good	0.171 \| good	4.487 \| good	0.308 \| good
2025-07-28T22:00:00.000Z	56 \| moderate	11.635 \| good	28.133 \| good	46.389 \| good	0.193 \| good	3.802 \| good	0.306 \| good
2025-07-28T23:00:00.000Z	64 \| moderate	16.064 \| fine	29.175 \| good	45.678 \| good	0.195 \| good	3.346 \| good	0.306 \| good
2025-07-29T00:00:00.000Z	60 \| moderate	14.417 \| fine	29.491 \| good	42.649 \| good	0.271 \| good	2.997 \| good	0.305 \| good
2025-07-29T01:00:00.000Z	58 \| moderate	13.365 \| fine	33.181 \| good	42.474 \| good	0.182 \| good	4.466 \| good	0.35 \| good
2025-07-29T02:00:00.000Z	60 \| moderate	14.492 \| fine	50.049 \| good	38.904 \| good	0.26 \| good	5.898 \| good	0.332 \| good
2025-07-29T03:00:00.000Z	62 \| moderate	14.542 \| fine	43.302 \| good	40.585 \| good	0.252 \| good	7.61 \| good	0.37 \| good
2025-07-29T04:00:00.000Z	64 \| moderate	16.325 \| fine	33.597 \| good	34.189 \| good	0.248 \| good	6.423 \| good	0.427 \| good
2025-07-29T05:00:00.000Z	64 \| moderate	15.927 \| fine	32.367 \| good	33.486 \| good	0.761 \| good	7.627 \| good	0.297 \| good
2025-07-29T06:00:00.000Z	67 \| moderate	18.106 \| fine	29.219 \| good	28.716 \| good	0.783 \| good	6.994 \| good	0.317 \| good
2025-07-29T07:00:00.000Z	67 \| moderate	17.954 \| fine	28.913 \| good	28.517 \| good	0.303 \| good	6.439 \| good	0.321 \| good
2025-07-29T08:00:00.000Z	62 \| moderate	15.217 \| fine	45.339 \| good	30.405 \| good	0.251 \| good	5.991 \| good	0.321 \| good
2025-07-29T09:00:00.000Z	60 \| moderate	14.246 \| fine	33.413 \| good	29.631 \| good	0.164 \| good	8.577 \| good	0.351 \| good
2025-07-29T10:00:00.000Z	60 \| moderate	13.923 \| fine	43.328 \| good	23.139 \| good	0.143 \| good	11.382 \| good	0.41 \| good
2025-07-29T11:00:00.000Z	64 \| moderate	15.503 \| fine	53.076 \| good	23.298 \| good	0.178 \| good	11.612 \| good	0.443 \| good
2025-07-29T12:00:00.000Z	60 \| moderate	13.578 \| fine	44.89 \| good	26.118 \| good	0.218 \| good	11.59 \| good	0.514 \| good
2025-07-29T13:00:00.000Z	58 \| moderate	13.419 \| fine	35.547 \| good	26.025 \| good	0.222 \| good	12.533 \| good	0.524 \| good
2025-07-29T14:00:00.000Z	58 \| moderate	12.595 \| fine	34.756 \| good	31.011 \| good	0.203 \| good	12.321 \| good	0.422 \| good
2025-07-29T15:00:00.000Z	60 \| moderate	13.809 \| fine	54.445 \| good	33.574 \| good	0.44 \| good	25.243 \| good	0.382 \| good
2025-07-29T16:00:00.000Z	56 \| moderate	12.469 \| fine	43.789 \| good	36.267 \| good	0.421 \| good	18.597 \| good	0.338 \| good
2025-07-29T17:00:00.000Z	58 \| moderate	13.01 \| fine	46.183 \| good	45.948 \| good	0.327 \| good	14.714 \| good	0.339 \| good
2025-07-29T18:00:00.000Z	58 \| moderate	13.447 \| fine	55.484 \| fine	52.889 \| good	0.257 \| good	9.028 \| good	0.405 \| good
2025-07-29T19:00:00.000Z	90 \| moderate	15.516 \| fine	44.321 \| good	67.004 \| fine	0.279 \| good	8.952 \| good	0.325 \| good
2025-07-29T20:00:00.000Z	84 \| moderate	14.649 \| fine	28.398 \| good	65.248 \| fine	0.368 \| good	17.868 \| good	0.341 \| good
2025-07-29T21:00:00.000Z	100 \| moderate	12.033 \| good	36.418 \| good	70.336 \| fine	0.411 \| good	15.822 \| good	0.308 \| good
2025-07-29T22:00:00.000Z	84 \| moderate	12.705 \| fine	46.947 \| good	65.073 \| fine	0.332 \| good	4.822 \| good	0.308 \| good
2025-07-29T23:00:00.000Z	74 \| moderate	11.526 \| good	26.393 \| good	61.648 \| fine	0.355 \| good	4.295 \| good	0.308 \| good
2025-07-30T00:00:00.000Z	100 \| moderate	13.233 \| fine	26.557 \| good	70.359 \| fine	0.336 \| good	6.209 \| good	0.341 \| good
2025-07-30T01:00:00.000Z	74 \| moderate	13.01 \| fine	29.798 \| good	62.009 \| fine	0.301 \| good	6.04 \| good	0.288 \| good
2025-07-30T02:00:00.000Z	84 \| moderate	12.083 \| good	39.804 \| good	65.297 \| fine	0.184 \| good	8.145 \| good	0.358 \| good
2025-07-30T03:00:00.000Z	77 \| moderate	23.429 \| fine	103 \| fine	43.972 \| good	0.7 \| good	5.922 \| good	0.282 \| good
2025-07-30T04:00:00.000Z	54 \| moderate	11.096 \| good	37.821 \| good	53.381 \| good	0.265 \| good	10.827 \| good	0.37 \| good
2025-07-30T05:00:00.000Z	58 \| moderate	12.875 \| fine	23.696 \| good	46.425 \| good	0.443 \| good	14.277 \| good	0.325 \| good
2025-07-30T06:00:00.000Z	56 \| moderate	12.351 \| fine	49.37 \| good	40.494 \| good	0.364 \| good	18.589 \| good	0.273 \| good
2025-07-30T07:00:00.000Z	58 \| moderate	12.86 \| fine	27.909 \| good	32.44 \| good	0.228 \| good	14.363 \| good	0.259 \| good
2025-07-30T08:00:00.000Z	56 \| moderate	12.037 \| good	32.265 \| good	33.712 \| good	0.375 \| good	15.128 \| good	0.259 \| good
2025-07-30T09:00:00.000Z	58 \| moderate	12.859 \| fine	34.546 \| good	41.102 \| good	0.27 \| good	13.575 \| good	0.249 \| good
2025-07-30T10:00:00.000Z	56 \| moderate	11.936 \| good	33.815 \| good	36.044 \| good	0.204 \| good	10.797 \| good	0.335 \| good
2025-07-30T11:00:00.000Z	56 \| moderate	11.735 \| good	23.566 \| good	33.47 \| good	0.183 \| good	19.668 \| good	0.357 \| good
2025-07-30T12:00:00.000Z	52 \| moderate	10.064 \| good	35.771 \| good	24.695 \| good	0.201 \| good	12.982 \| good	0.347 \| good
2025-07-30T13:00:00.000Z	49 \| good	9.185 \| good	26.384 \| good	28.196 \| good	0.218 \| good	9.239 \| good	0.295 \| good
2025-07-30T14:00:00.000Z	52 \| moderate	9.673 \| good	32.327 \| good	30.929 \| good	0.176 \| good	7.18 \| good	0.261 \| good
2025-07-30T15:00:00.000Z	52 \| moderate	9.801 \| good	29.28 \| good	37.832 \| good	0.234 \| good	8.717 \| good	0.297 \| good
2025-07-30T16:00:00.000Z	52 \| moderate	10.034 \| good	31.59 \| good	37.723 \| good	0.271 \| good	10.494 \| good	0.261 \| good
2025-07-30T17:00:00.000Z	52 \| moderate	9.738 \| good	21.263 \| good	44.62 \| good	0.272 \| good	8.589 \| good	0.275 \| good
2025-07-30T18:00:00.000Z	49 \| good	9.455 \| good	26.624 \| good	50.166 \| good	0.264 \| good	6.682 \| good	0.237 \| good
2025-07-30T19:00:00.000Z	58 \| moderate	9.723 \| good	43.258 \| good	56.509 \| fine	0.27 \| good	7.751 \| good	0.249 \| good
2025-07-30T19:00:00.000Z	58 \| moderate	9.723 \| good	43.258 \| good	56.509 \| fine	0.27 \| good	7.751 \| good	0.249 \| good
2025-07-30T14:00:00.000Z	60 \| moderate	14.447 \| fine	65.078 \| fine	42.913 \| good	0.725 \| good	4.422 \| good	0.297 \| good
2025-07-30T15:00:00.000Z	60 \| moderate	13.81 \| fine	61.89 \| fine	47.714 \| good	0.751 \| good	3.833 \| good	0.304 \| good
2025-07-30T16:00:00.000Z	60 \| moderate	14.037 \| fine	63.269 \| fine	53.91 \| good	0.711 \| good	3.188 \| good	0.298 \| good
2025-07-30T17:00:00.000Z	64 \| moderate	14.864 \| fine	66.693 \| fine	58.951 \| fine	0.671 \| good	2.543 \| good	0.292 \| good
2025-07-30T18:00:00.000Z	64 \| moderate	13.981 \| fine	62.47 \| fine	59.439 \| fine	0.63 \| good	1.898 \| good	0.286 \| good
2025-07-30T19:00:00.000Z	58 \| moderate	13.115 \| fine	59.529 \| fine	51.936 \| good	0.794 \| good	2.069 \| good	0.275 \| good
2025-07-30T20:00:00.000Z	62 \| moderate	15.311 \| fine	67.912 \| fine	53.163 \| good	0.957 \| good	2.24 \| good	0.264 \| good
2025-07-30T21:00:00.000Z	119 \| sensitive	21.627 \| fine	95.006 \| fine	76.414 \| moderate	1.12 \| good	2.411 \| good	0.253 \| good
2025-07-30T22:00:00.000Z	140 \| sensitive	26.121 \| fine	113.664 \| fine	82.257 \| moderate	1.109 \| good	3.632 \| good	0.255 \| good
2025-07-30T23:00:00.000Z	122 \| sensitive	24.538 \| fine	106.991 \| fine	77.241 \| moderate	1.098 \| good	4.854 \| good	0.257 \| good
2025-07-31T00:00:00.000Z	81 \| moderate	25.216 \| fine	110.064 \| fine	59.741 \| fine	1.088 \| good	6.076 \| good	0.259 \| good
2025-07-31T01:00:00.000Z	77 \| moderate	22.734 \| fine	100.189 \| fine	50.118 \| good	1.044 \| good	6.071 \| good	0.254 \| good
2025-07-31T02:00:00.000Z	75 \| moderate	22.185 \| fine	97.531 \| fine	43.863 \| good	1.001 \| good	6.066 \| good	0.249 \| good
2025-07-31T03:00:00.000Z	75 \| moderate	21.831 \| fine	95.446 \| fine	44.141 \| good	0.957 \| good	6.062 \| good	0.244 \| good
2025-07-31T04:00:00.000Z	69 \| moderate	19.43 \| fine	86.081 \| fine	43.342 \| good	0.902 \| good	5.829 \| good	0.24 \| good
2025-07-31T05:00:00.000Z	69 \| moderate	18.698 \| fine	82.497 \| fine	39.892 \| good	0.846 \| good	5.595 \| good	0.236 \| good
2025-07-31T06:00:00.000Z	66 \| moderate	17.358 \| fine	76.866 \| fine	32.526 \| good	0.791 \| good	5.362 \| good	0.232 \| good
2025-07-31T07:00:00.000Z	66 \| moderate	17.474 \| fine	77.069 \| fine	31.259 \| good	0.71 \| good	4.767 \| good	0.23 \| good
2025-07-31T08:00:00.000Z	64 \| moderate	16.222 \| fine	72.388 \| fine	28.38 \| good	0.629 \| good	4.172 \| good	0.229 \| good
2025-07-31T09:00:00.000Z	69 \| moderate	19.43 \| fine	85.935 \| fine	24.355 \| good	0.548 \| good	3.576 \| good	0.227 \| good
2025-07-31T10:00:00.000Z	67 \| moderate	17.908 \| fine	79.16 \| fine	22.035 \| good	0.545 \| good	3.514 \| good	0.232 \| good
2025-07-31T11:00:00.000Z	67 \| moderate	18.351 \| fine	81 \| fine	21.959 \| good	0.543 \| good	3.452 \| good	0.237 \| good
2025-07-31T12:00:00.000Z	75 \| moderate	22.453 \| fine	98.132 \| fine	27.11 \| good	0.541 \| good	3.39 \| good	0.242 \| good
2025-07-31T13:00:00.000Z	75 \| moderate	22.38 \| fine	97.571 \| fine	37.725 \| good	0.513 \| good	2.945 \| good	0.244 \| good
2025-07-31T14:00:00.000Z	71 \| moderate	20.346 \| fine	89.163 \| fine	44.281 \| good	0.484 \| good	2.5 \| good	0.246 \| good
2025-07-31T15:00:00.000Z	69 \| moderate	19.021 \| fine	84.314 \| fine	46.226 \| good	0.456 \| good	2.055 \| good	0.248 \| good
2025-07-31T16:00:00.000Z	69 \| moderate	18.946 \| fine	83.792 \| fine	47.236 \| good	0.428 \| good	2.026 \| good	0.242 \| good
2025-07-31T17:00:00.000Z	69 \| moderate	18.549 \| fine	81.659 \| fine	49.606 \| good	0.4 \| good	1.996 \| good	0.236 \| good
2025-07-31T18:00:00.000Z	67 \| moderate	17.874 \| fine	78.724 \| fine	51.798 \| good	0.373 \| good	1.966 \| good	0.23 \| good
2025-07-31T19:00:00.000Z	66 \| moderate	16.783 \| fine	74.329 \| fine	44.799 \| good	0.377 \| good	2.173 \| good	0.231 \| good
2025-07-31T20:00:00.000Z	67 \| moderate	18.261 \| fine	81.013 \| fine	44.003 \| good	0.381 \| good	2.379 \| good	0.232 \| good
2025-07-31T21:00:00.000Z	62 \| moderate	15.41 \| fine	68.566 \| fine	44.039 \| good	0.384 \| good	2.586 \| good	0.233 \| good
2025-07-31T22:00:00.000Z	60 \| moderate	14.391 \| fine	64.746 \| fine	37.42 \| good	0.372 \| good	3.138 \| good	0.241 \| good
2025-07-31T23:00:00.000Z	62 \| moderate	14.805 \| fine	65.788 \| fine	27.341 \| good	0.36 \| good	3.69 \| good	0.249 \| good
2025-08-01T00:00:00.000Z	67 \| moderate	18.037 \| fine	80.166 \| fine	25.255 \| good	0.349 \| good	4.242 \| good	0.256 \| good
2025-08-01T01:00:00.000Z	69 \| moderate	18.697 \| fine	82.326 \| fine	23.367 \| good	0.373 \| good	4.033 \| good	0.257 \| good
2025-08-01T02:00:00.000Z	69 \| moderate	18.615 \| fine	82.272 \| fine	23.864 \| good	0.398 \| good	3.823 \| good	0.257 \| good
2025-08-01T03:00:00.000Z	69 \| moderate	18.807 \| fine	83.75 \| fine	23.001 \| good	0.423 \| good	3.614 \| good	0.257 \| good
2025-08-01T04:00:00.000Z	67 \| moderate	17.578 \| fine	77.914 \| fine	23.328 \| good	0.442 \| good	3.685 \| good	0.255 \| good
2025-08-01T05:00:00.000Z	64 \| moderate	16.238 \| fine	71.977 \| fine	22.288 \| good	0.46 \| good	3.756 \| good	0.252 \| good
2025-08-01T06:00:00.000Z	62 \| moderate	14.826 \| fine	66.101 \| fine	20.23 \| good	0.478 \| good	3.828 \| good	0.25 \| good
2025-08-01T07:00:00.000Z	60 \| moderate	13.932 \| fine	62.408 \| fine	21.375 \| good	0.534 \| good	3.967 \| good	0.248 \| good
2025-08-01T08:00:00.000Z	58 \| moderate	13.398 \| fine	60.329 \| fine	23.011 \| good	0.59 \| good	4.106 \| good	0.246 \| good
2025-08-01T09:00:00.000Z	58 \| moderate	12.661 \| fine	56.408 \| fine	22.048 \| good	0.646 \| good	4.246 \| good	0.244 \| good
2025-08-01T10:00:00.000Z	58 \| moderate	12.715 \| fine	57.652 \| fine	23.934 \| good	0.636 \| good	3.885 \| good	0.24 \| good
2025-08-01T11:00:00.000Z	58 \| moderate	13.147 \| fine	59.365 \| fine	24.964 \| good	0.626 \| good	3.523 \| good	0.236 \| good
2025-08-01T12:00:00.000Z	56 \| moderate	12.143 \| fine	54.229 \| good	25.71 \| good	0.616 \| good	3.162 \| good	0.232 \| good
2025-08-01T13:00:00.000Z	52 \| moderate	9.868 \| good	44.125 \| good	29.136 \| good	0.532 \| good	3.08 \| good	0.226 \| good

Live air quality index in Stonington, Connecticut today

Major air pollutants in Stonington, Connecticut

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Stonington, Connecticut air quality map: Stay updated on AQI near you

Air quality in nearby cities

Westerly, Rhode Island

Groton, Connecticut

Ledyard, Connecticut

New London, Connecticut

Waterford, Connecticut

Montville, Connecticut

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Frequently asked questions

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

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

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

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