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

The current PM10 concentration at Greenwich, Connecticut is 23.43 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Greenwich, Connecticut is 0.707 ppb.

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

The current ozone (O3) concentration at Greenwich, Connecticut is 47.619 ppm.

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

The current nitrogen dioxide (NO2) concentration at Greenwich, Connecticut is 6.289 ppb.

Greenwich, Connecticut live air quality index now

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

The current PM2.5 concentration at Greenwich, Connecticut is 7.612 μg/m3.

Stay updated with real-time air quality in Greenwich, 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

Greenwich, Connecticut

Last updated: ... (Local time)

Major air pollutants in Greenwich, Connecticut

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.61 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

23.43 μg/m³

155

255

425

605+

Ozone (O₃)

47.62 ppb

201

201+

Sulfur Dioxide (SO₂)

0.71 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.29 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.26 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Greenwich, Connecticut

Get Live Pollen Counts

Greenwich, Connecticut

Scroll To Air Quality Map

Track live Greenwich, Connecticut air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-27T20:00:00.000Z	44 \| good	8.474 \| good	30.063 \| good	40.476 \| good	0.418 \| good	11.859 \| good	0.315 \| good
2026-06-27T21:00:00.000Z	44 \| good	8.427 \| good	31.927 \| good	46.511 \| good	0.606 \| good	12.985 \| good	0.3 \| good
2026-06-27T22:00:00.000Z	41 \| good	7.318 \| good	33.258 \| good	44.414 \| good	0.657 \| good	16.373 \| good	0.3 \| good
2026-06-27T23:00:00.000Z	49 \| good	8.908 \| good	32.987 \| good	41.431 \| good	0.603 \| good	16.94 \| good	0.332 \| good
2026-06-28T00:00:00.000Z	49 \| good	9.219 \| good	37.708 \| good	41.537 \| good	0.4 \| good	18.013 \| good	0.402 \| good
2026-06-28T01:00:00.000Z	44 \| good	8.213 \| good	33.947 \| good	38.548 \| good	0.455 \| good	24.151 \| good	0.387 \| good
2026-06-28T02:00:00.000Z	49 \| good	8.798 \| good	19.158 \| good	33.736 \| good	0.463 \| good	30.171 \| good	0.435 \| good
2026-06-28T03:00:00.000Z	60 \| moderate	13.954 \| fine	62.731 \| fine	28.384 \| good	0.778 \| good	22.225 \| good	0.252 \| good
2026-06-28T04:00:00.000Z	52 \| moderate	10.403 \| good	32.862 \| good	34.908 \| good	0.592 \| good	16.66 \| good	0.419 \| good
2026-06-28T05:00:00.000Z	54 \| moderate	11.451 \| good	42.494 \| good	25.595 \| good	0.562 \| good	11.178 \| good	0.386 \| good
2026-06-28T06:00:00.000Z	49 \| good	8.965 \| good	31.537 \| good	16.787 \| good	0.547 \| good	12.428 \| good	0.434 \| good
2026-06-28T07:00:00.000Z	49 \| good	8.85 \| good	24.221 \| good	16.558 \| good	0.636 \| good	12.061 \| good	0.437 \| good
2026-06-28T08:00:00.000Z	49 \| good	8.505 \| good	24.274 \| good	20.287 \| good	0.565 \| good	9.415 \| good	0.434 \| good
2026-06-28T09:00:00.000Z	49 \| good	8.864 \| good	20.49 \| good	17.72 \| good	0.928 \| good	8.431 \| good	0.402 \| good
2026-06-28T10:00:00.000Z	44 \| good	8.298 \| good	19.286 \| good	14.096 \| good	0.906 \| good	7.402 \| good	0.41 \| good
2026-06-28T11:00:00.000Z	54 \| moderate	11.471 \| good	34.728 \| good	12.382 \| good	0.909 \| good	8.037 \| good	0.377 \| good
2026-06-28T12:00:00.000Z	56 \| moderate	12.185 \| fine	40.261 \| good	19.483 \| good	0.938 \| good	15.016 \| good	0.387 \| good
2026-06-28T13:00:00.000Z	49 \| good	8.811 \| good	30.617 \| good	19.483 \| good	1.073 \| good	10.39 \| good	0.383 \| good
2026-06-28T14:00:00.000Z	49 \| good	8.542 \| good	35.361 \| good	18.401 \| good	0.466 \| good	9.057 \| good	0.307 \| good
2026-06-28T15:00:00.000Z	54 \| moderate	10.568 \| good	31.077 \| good	27.584 \| good	0.404 \| good	6.272 \| good	0.29 \| good
2026-06-28T16:00:00.000Z	49 \| good	8.989 \| good	26.779 \| good	32.041 \| good	0.448 \| good	5.973 \| good	0.321 \| good
2026-06-28T17:00:00.000Z	49 \| good	8.769 \| good	28.931 \| good	45.653 \| good	0.421 \| good	4.742 \| good	0.306 \| good
2026-06-28T18:00:00.000Z	49 \| good	7.993 \| good	35.918 \| good	53.484 \| good	0.397 \| good	4.084 \| good	0.29 \| good
2026-06-28T19:00:00.000Z	49 \| good	7.347 \| good	27.109 \| good	53.272 \| good	0.643 \| good	2.504 \| good	0.305 \| good
2026-06-28T20:00:00.000Z	54 \| moderate	8.947 \| good	25.34 \| good	56.09 \| fine	0.768 \| good	2.899 \| good	0.29 \| good
2026-06-28T21:00:00.000Z	61 \| moderate	8.749 \| good	36.227 \| good	57.904 \| fine	0.795 \| good	2.692 \| good	0.29 \| good
2026-06-28T22:00:00.000Z	58 \| moderate	7.322 \| good	35.819 \| good	57.421 \| fine	0.757 \| good	3.056 \| good	0.246 \| good
2026-06-28T23:00:00.000Z	51 \| moderate	8.038 \| good	37.867 \| good	54.789 \| good	0.755 \| good	2.222 \| good	0.236 \| good
2026-06-29T00:00:00.000Z	51 \| moderate	7.918 \| good	23.715 \| good	54.588 \| good	0.759 \| good	4.9 \| good	0.25 \| good
2026-06-29T01:00:00.000Z	48 \| good	7.159 \| good	27.561 \| good	51.998 \| good	0.958 \| good	7.294 \| good	0.25 \| good
2026-06-29T02:00:00.000Z	44 \| good	6.656 \| good	28.854 \| good	48.384 \| good	0.989 \| good	7.295 \| good	0.25 \| good
2026-06-29T03:00:00.000Z	44 \| good	8.082 \| good	35.753 \| good	32.788 \| good	0.602 \| good	12.285 \| good	0.197 \| good
2026-06-29T04:00:00.000Z	44 \| good	7.663 \| good	28.939 \| good	43.666 \| good	1.014 \| good	8.983 \| good	0.25 \| good
2026-06-29T05:00:00.000Z	44 \| good	7.63 \| good	32.345 \| good	43.33 \| good	1.025 \| good	14.691 \| good	0.296 \| good
2026-06-29T06:00:00.000Z	44 \| good	8.105 \| good	26.463 \| good	42.478 \| good	0.955 \| good	14.918 \| good	0.28 \| good
2026-06-29T07:00:00.000Z	38 \| good	6.73 \| good	25.508 \| good	39.648 \| good	1.101 \| good	18.692 \| good	0.275 \| good
2026-06-29T08:00:00.000Z	44 \| good	7.527 \| good	19.554 \| good	29.697 \| good	0.934 \| good	15.187 \| good	0.263 \| good
2026-06-29T09:00:00.000Z	44 \| good	7.89 \| good	23.284 \| good	14.786 \| good	0.948 \| good	15.673 \| good	0.265 \| good
2026-06-29T10:00:00.000Z	38 \| good	7.216 \| good	24.106 \| good	13.074 \| good	0.299 \| good	13.615 \| good	0.212 \| good
2026-06-29T11:00:00.000Z	49 \| good	9.169 \| good	30.072 \| good	8.308 \| good	0.925 \| good	14.678 \| good	0.315 \| good
2026-06-29T12:00:00.000Z	49 \| good	8.884 \| good	46.62 \| good	11.188 \| good	0.754 \| good	20.195 \| good	0.383 \| good
2026-06-29T13:00:00.000Z	54 \| moderate	10.528 \| good	59.125 \| fine	11.797 \| good	0.832 \| good	20.015 \| good	0.379 \| good
2026-06-29T14:00:00.000Z	52 \| moderate	10.34 \| good	49.058 \| good	13.057 \| good	0.917 \| good	23.381 \| good	0.338 \| good
2026-06-29T15:00:00.000Z	52 \| moderate	10.162 \| good	39.737 \| good	14.603 \| good	0.888 \| good	16.027 \| good	0.315 \| good
2026-06-29T16:00:00.000Z	49 \| good	9.179 \| good	34.027 \| good	42.993 \| good	0.772 \| good	6.931 \| good	0.281 \| good
2026-06-29T17:00:00.000Z	49 \| good	9.302 \| good	29.386 \| good	42.655 \| good	0.694 \| good	7.293 \| good	0.247 \| good
2026-06-29T18:00:00.000Z	44 \| good	7.612 \| good	23.43 \| good	47.619 \| good	0.707 \| good	6.289 \| good	0.264 \| good
2026-06-29T19:00:00.000Z	52 \| moderate	9.973 \| good	31.056 \| good	51.604 \| good	0.767 \| good	15.259 \| good	0.29 \| good
2026-06-29T19:00:00.000Z	44 \| good	7.612 \| good	23.43 \| good	47.619 \| good	0.707 \| good	6.289 \| good	0.264 \| good
2026-06-29T20:00:00.000Z	43 \| good	5.716 \| good	24.85 \| good	46.491 \| good	0.454 \| good	2.183 \| good	0.153 \| good
2026-06-29T21:00:00.000Z	39 \| good	6.16 \| good	26.936 \| good	42.229 \| good	0.487 \| good	2.773 \| good	0.155 \| good
2026-06-29T22:00:00.000Z	49 \| good	9 \| good	39.855 \| good	51.999 \| good	0.517 \| good	3.547 \| good	0.157 \| good
2026-06-29T23:00:00.000Z	50 \| good	7.532 \| good	33.302 \| good	53.795 \| good	0.535 \| good	5.72 \| good	0.167 \| good
2026-06-30T00:00:00.000Z	44 \| good	8.16 \| good	35.883 \| good	42.498 \| good	0.584 \| good	8.347 \| good	0.172 \| good
2026-06-30T01:00:00.000Z	38 \| good	6.872 \| good	30.573 \| good	34.186 \| good	0.64 \| good	11.36 \| good	0.179 \| good
2026-06-30T02:00:00.000Z	44 \| good	7.862 \| good	34.601 \| good	28.297 \| good	0.68 \| good	12.682 \| good	0.175 \| good
2026-06-30T03:00:00.000Z	44 \| good	8.209 \| good	35.965 \| good	24.572 \| good	0.698 \| good	14.018 \| good	0.17 \| good
2026-06-30T04:00:00.000Z	44 \| good	7.556 \| good	33.573 \| good	25.461 \| good	0.703 \| good	14.845 \| good	0.17 \| good
2026-06-30T05:00:00.000Z	38 \| good	7.118 \| good	31.557 \| good	26.432 \| good	0.696 \| good	14.264 \| good	0.17 \| good
2026-06-30T06:00:00.000Z	38 \| good	6.559 \| good	28.871 \| good	25.278 \| good	0.703 \| good	13.867 \| good	0.169 \| good
2026-06-30T07:00:00.000Z	33 \| good	6.323 \| good	27.71 \| good	20.777 \| good	0.711 \| good	13.275 \| good	0.169 \| good
2026-06-30T08:00:00.000Z	38 \| good	7.38 \| good	32.795 \| good	15.915 \| good	0.724 \| good	12.836 \| good	0.171 \| good
2026-06-30T09:00:00.000Z	44 \| good	8.398 \| good	37.101 \| good	13.347 \| good	0.742 \| good	12.812 \| good	0.173 \| good
2026-06-30T10:00:00.000Z	52 \| moderate	9.982 \| good	44.277 \| good	12.033 \| good	0.759 \| good	12.961 \| good	0.178 \| good
2026-06-30T11:00:00.000Z	54 \| moderate	11.239 \| good	49.917 \| good	16.652 \| good	0.754 \| good	11.574 \| good	0.185 \| good
2026-06-30T12:00:00.000Z	49 \| good	8.96 \| good	39.64 \| good	21.374 \| good	0.81 \| good	9.186 \| good	0.185 \| good
2026-06-30T13:00:00.000Z	49 \| good	9.308 \| good	41.436 \| good	27.964 \| good	0.829 \| good	7.638 \| good	0.186 \| good
2026-06-30T14:00:00.000Z	52 \| moderate	9.928 \| good	44.21 \| good	37.457 \| good	0.839 \| good	5.885 \| good	0.178 \| good
2026-06-30T15:00:00.000Z	58 \| moderate	12.826 \| fine	57.192 \| fine	47.727 \| good	0.814 \| good	4.54 \| good	0.171 \| good
2026-06-30T16:00:00.000Z	71 \| moderate	13.548 \| fine	60.332 \| fine	60.788 \| fine	0.725 \| good	3.511 \| good	0.165 \| good
2026-06-30T17:00:00.000Z	105 \| sensitive	11.103 \| good	49.873 \| good	71.639 \| moderate	0.665 \| good	2.645 \| good	0.159 \| good
2026-06-30T18:00:00.000Z	108 \| sensitive	9.979 \| good	44.287 \| good	72.935 \| moderate	0.629 \| good	2.221 \| good	0.154 \| good
2026-06-30T19:00:00.000Z	97 \| moderate	8.364 \| good	36.705 \| good	68.793 \| fine	0.614 \| good	2.166 \| good	0.15 \| good
2026-06-30T20:00:00.000Z	71 \| moderate	6.586 \| good	29.218 \| good	61.427 \| fine	0.562 \| good	2.225 \| good	0.146 \| good
2026-06-30T21:00:00.000Z	54 \| moderate	5.707 \| good	24.736 \| good	55.888 \| fine	0.501 \| good	2.542 \| good	0.145 \| good
2026-06-30T22:00:00.000Z	50 \| good	5.716 \| good	24.748 \| good	54.407 \| good	0.466 \| good	3.364 \| good	0.147 \| good
2026-06-30T23:00:00.000Z	45 \| good	6.324 \| good	27.87 \| good	48.906 \| good	0.453 \| good	4.835 \| good	0.152 \| good
2026-07-01T00:00:00.000Z	38 \| good	7.179 \| good	31.699 \| good	40.332 \| good	0.464 \| good	7.178 \| good	0.156 \| good
2026-07-01T01:00:00.000Z	49 \| good	8.684 \| good	38.084 \| good	34.709 \| good	0.492 \| good	9.1 \| good	0.16 \| good
2026-07-01T02:00:00.000Z	52 \| moderate	10.047 \| good	44.75 \| good	31.863 \| good	0.526 \| good	10.071 \| good	0.162 \| good
2026-07-01T03:00:00.000Z	33 \| good	5.666 \| good	24.666 \| good	29.566 \| good	0.55 \| good	10.205 \| good	0.159 \| good
2026-07-01T04:00:00.000Z	27 \| good	3.854 \| good	16.603 \| good	29.485 \| good	0.565 \| good	9.143 \| good	0.156 \| good
2026-07-01T05:00:00.000Z	28 \| good	3.321 \| good	14.19 \| good	29.956 \| good	0.569 \| good	7.769 \| good	0.153 \| good
2026-07-01T06:00:00.000Z	25 \| good	3.401 \| good	14.395 \| good	27.344 \| good	0.558 \| good	6.946 \| good	0.149 \| good
2026-07-01T07:00:00.000Z	22 \| good	3.999 \| good	17.232 \| good	21.805 \| good	0.52 \| good	6.236 \| good	0.143 \| good
2026-07-01T08:00:00.000Z	27 \| good	4.724 \| good	20.57 \| good	17.458 \| good	0.515 \| good	6.151 \| good	0.141 \| good
2026-07-01T09:00:00.000Z	22 \| good	3.556 \| good	15.273 \| good	15.781 \| good	0.532 \| good	6.277 \| good	0.141 \| good
2026-07-01T10:00:00.000Z	33 \| good	5.53 \| good	24.045 \| good	15.577 \| good	0.544 \| good	6.467 \| good	0.142 \| good
2026-07-01T11:00:00.000Z	44 \| good	7.817 \| good	34.521 \| good	20.983 \| good	0.562 \| good	6.111 \| good	0.144 \| good
2026-07-01T12:00:00.000Z	38 \| good	7.05 \| good	30.903 \| good	30.269 \| good	0.625 \| good	5.626 \| good	0.15 \| good
2026-07-01T13:00:00.000Z	54 \| moderate	11.051 \| good	49.164 \| good	41.782 \| good	0.677 \| good	5.012 \| good	0.16 \| good
2026-07-01T14:00:00.000Z	62 \| moderate	14.563 \| fine	65.176 \| fine	53.869 \| good	0.714 \| good	4.446 \| good	0.171 \| good
2026-07-01T15:00:00.000Z	77 \| moderate	17.744 \| fine	78.371 \| fine	63.459 \| fine	0.751 \| good	3.761 \| good	0.18 \| good
2026-07-01T16:00:00.000Z	108 \| sensitive	18.852 \| fine	83.339 \| fine	73.164 \| moderate	0.782 \| good	3.042 \| good	0.185 \| good
2026-07-01T17:00:00.000Z	105 \| sensitive	16.385 \| fine	72.908 \| fine	72.151 \| moderate	0.764 \| good	2.441 \| good	0.183 \| good
2026-07-01T18:00:00.000Z	87 \| moderate	16.522 \| fine	73.638 \| fine	65.687 \| fine	0.719 \| good	2.09 \| good	0.179 \| good
2026-07-01T19:00:00.000Z	67 \| moderate	18.171 \| fine	80.248 \| fine	59.873 \| fine	0.691 \| good	2.148 \| good	0.178 \| good

Greenwich

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Greenwich, Connecticut air quality map: Track AQI near you

0.27ppm

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 Greenwich, Connecticut updated?

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

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

The worst air quality in Greenwich, Connecticut in the last 24 hours was observed at 09:00:00 on 2026-06-28.

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

In the last 24 hrs, the best air quality in Greenwich, Connecticut was observed at 10:00:00 on 2026-06-29.

What is the current air quality in Greenwich, Connecticut?

The current air quality in Greenwich, Connecticut is 44, categorized as Good based on real-time data.

What pollutant is the most common in Greenwich, Connecticut?

The most common pollutant in Greenwich, Connecticut is O3.

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

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

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

The current PM_2.5 concentration at Greenwich, Connecticut is 7.612 μg/m³.

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

The current PM₁₀ concentration at Greenwich, Connecticut is 23.43 μg/m³.

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

The current carbon monoxide (CO) concentration at Greenwich, Connecticut is 0.264 ppm.

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

The current sulfur dioxide (SO₂) concentration at Greenwich, Connecticut is 0.707 ppb.

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

The current ozone (O₃) concentration at Greenwich, Connecticut is 47.619 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Greenwich, Connecticut is 6.289 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-27T20:00:00.000Z	44 \| good	8.474 \| good	30.063 \| good	40.476 \| good	0.418 \| good	11.859 \| good	0.315 \| good
2026-06-27T21:00:00.000Z	44 \| good	8.427 \| good	31.927 \| good	46.511 \| good	0.606 \| good	12.985 \| good	0.3 \| good
2026-06-27T22:00:00.000Z	41 \| good	7.318 \| good	33.258 \| good	44.414 \| good	0.657 \| good	16.373 \| good	0.3 \| good
2026-06-27T23:00:00.000Z	49 \| good	8.908 \| good	32.987 \| good	41.431 \| good	0.603 \| good	16.94 \| good	0.332 \| good
2026-06-28T00:00:00.000Z	49 \| good	9.219 \| good	37.708 \| good	41.537 \| good	0.4 \| good	18.013 \| good	0.402 \| good
2026-06-28T01:00:00.000Z	44 \| good	8.213 \| good	33.947 \| good	38.548 \| good	0.455 \| good	24.151 \| good	0.387 \| good
2026-06-28T02:00:00.000Z	49 \| good	8.798 \| good	19.158 \| good	33.736 \| good	0.463 \| good	30.171 \| good	0.435 \| good
2026-06-28T03:00:00.000Z	60 \| moderate	13.954 \| fine	62.731 \| fine	28.384 \| good	0.778 \| good	22.225 \| good	0.252 \| good
2026-06-28T04:00:00.000Z	52 \| moderate	10.403 \| good	32.862 \| good	34.908 \| good	0.592 \| good	16.66 \| good	0.419 \| good
2026-06-28T05:00:00.000Z	54 \| moderate	11.451 \| good	42.494 \| good	25.595 \| good	0.562 \| good	11.178 \| good	0.386 \| good
2026-06-28T06:00:00.000Z	49 \| good	8.965 \| good	31.537 \| good	16.787 \| good	0.547 \| good	12.428 \| good	0.434 \| good
2026-06-28T07:00:00.000Z	49 \| good	8.85 \| good	24.221 \| good	16.558 \| good	0.636 \| good	12.061 \| good	0.437 \| good
2026-06-28T08:00:00.000Z	49 \| good	8.505 \| good	24.274 \| good	20.287 \| good	0.565 \| good	9.415 \| good	0.434 \| good
2026-06-28T09:00:00.000Z	49 \| good	8.864 \| good	20.49 \| good	17.72 \| good	0.928 \| good	8.431 \| good	0.402 \| good
2026-06-28T10:00:00.000Z	44 \| good	8.298 \| good	19.286 \| good	14.096 \| good	0.906 \| good	7.402 \| good	0.41 \| good
2026-06-28T11:00:00.000Z	54 \| moderate	11.471 \| good	34.728 \| good	12.382 \| good	0.909 \| good	8.037 \| good	0.377 \| good
2026-06-28T12:00:00.000Z	56 \| moderate	12.185 \| fine	40.261 \| good	19.483 \| good	0.938 \| good	15.016 \| good	0.387 \| good
2026-06-28T13:00:00.000Z	49 \| good	8.811 \| good	30.617 \| good	19.483 \| good	1.073 \| good	10.39 \| good	0.383 \| good
2026-06-28T14:00:00.000Z	49 \| good	8.542 \| good	35.361 \| good	18.401 \| good	0.466 \| good	9.057 \| good	0.307 \| good
2026-06-28T15:00:00.000Z	54 \| moderate	10.568 \| good	31.077 \| good	27.584 \| good	0.404 \| good	6.272 \| good	0.29 \| good
2026-06-28T16:00:00.000Z	49 \| good	8.989 \| good	26.779 \| good	32.041 \| good	0.448 \| good	5.973 \| good	0.321 \| good
2026-06-28T17:00:00.000Z	49 \| good	8.769 \| good	28.931 \| good	45.653 \| good	0.421 \| good	4.742 \| good	0.306 \| good
2026-06-28T18:00:00.000Z	49 \| good	7.993 \| good	35.918 \| good	53.484 \| good	0.397 \| good	4.084 \| good	0.29 \| good
2026-06-28T19:00:00.000Z	49 \| good	7.347 \| good	27.109 \| good	53.272 \| good	0.643 \| good	2.504 \| good	0.305 \| good
2026-06-28T20:00:00.000Z	54 \| moderate	8.947 \| good	25.34 \| good	56.09 \| fine	0.768 \| good	2.899 \| good	0.29 \| good
2026-06-28T21:00:00.000Z	61 \| moderate	8.749 \| good	36.227 \| good	57.904 \| fine	0.795 \| good	2.692 \| good	0.29 \| good
2026-06-28T22:00:00.000Z	58 \| moderate	7.322 \| good	35.819 \| good	57.421 \| fine	0.757 \| good	3.056 \| good	0.246 \| good
2026-06-28T23:00:00.000Z	51 \| moderate	8.038 \| good	37.867 \| good	54.789 \| good	0.755 \| good	2.222 \| good	0.236 \| good
2026-06-29T00:00:00.000Z	51 \| moderate	7.918 \| good	23.715 \| good	54.588 \| good	0.759 \| good	4.9 \| good	0.25 \| good
2026-06-29T01:00:00.000Z	48 \| good	7.159 \| good	27.561 \| good	51.998 \| good	0.958 \| good	7.294 \| good	0.25 \| good
2026-06-29T02:00:00.000Z	44 \| good	6.656 \| good	28.854 \| good	48.384 \| good	0.989 \| good	7.295 \| good	0.25 \| good
2026-06-29T03:00:00.000Z	44 \| good	8.082 \| good	35.753 \| good	32.788 \| good	0.602 \| good	12.285 \| good	0.197 \| good
2026-06-29T04:00:00.000Z	44 \| good	7.663 \| good	28.939 \| good	43.666 \| good	1.014 \| good	8.983 \| good	0.25 \| good
2026-06-29T05:00:00.000Z	44 \| good	7.63 \| good	32.345 \| good	43.33 \| good	1.025 \| good	14.691 \| good	0.296 \| good
2026-06-29T06:00:00.000Z	44 \| good	8.105 \| good	26.463 \| good	42.478 \| good	0.955 \| good	14.918 \| good	0.28 \| good
2026-06-29T07:00:00.000Z	38 \| good	6.73 \| good	25.508 \| good	39.648 \| good	1.101 \| good	18.692 \| good	0.275 \| good
2026-06-29T08:00:00.000Z	44 \| good	7.527 \| good	19.554 \| good	29.697 \| good	0.934 \| good	15.187 \| good	0.263 \| good
2026-06-29T09:00:00.000Z	44 \| good	7.89 \| good	23.284 \| good	14.786 \| good	0.948 \| good	15.673 \| good	0.265 \| good
2026-06-29T10:00:00.000Z	38 \| good	7.216 \| good	24.106 \| good	13.074 \| good	0.299 \| good	13.615 \| good	0.212 \| good
2026-06-29T11:00:00.000Z	49 \| good	9.169 \| good	30.072 \| good	8.308 \| good	0.925 \| good	14.678 \| good	0.315 \| good
2026-06-29T12:00:00.000Z	49 \| good	8.884 \| good	46.62 \| good	11.188 \| good	0.754 \| good	20.195 \| good	0.383 \| good
2026-06-29T13:00:00.000Z	54 \| moderate	10.528 \| good	59.125 \| fine	11.797 \| good	0.832 \| good	20.015 \| good	0.379 \| good
2026-06-29T14:00:00.000Z	52 \| moderate	10.34 \| good	49.058 \| good	13.057 \| good	0.917 \| good	23.381 \| good	0.338 \| good
2026-06-29T15:00:00.000Z	52 \| moderate	10.162 \| good	39.737 \| good	14.603 \| good	0.888 \| good	16.027 \| good	0.315 \| good
2026-06-29T16:00:00.000Z	49 \| good	9.179 \| good	34.027 \| good	42.993 \| good	0.772 \| good	6.931 \| good	0.281 \| good
2026-06-29T17:00:00.000Z	49 \| good	9.302 \| good	29.386 \| good	42.655 \| good	0.694 \| good	7.293 \| good	0.247 \| good
2026-06-29T18:00:00.000Z	44 \| good	7.612 \| good	23.43 \| good	47.619 \| good	0.707 \| good	6.289 \| good	0.264 \| good
2026-06-29T19:00:00.000Z	52 \| moderate	9.973 \| good	31.056 \| good	51.604 \| good	0.767 \| good	15.259 \| good	0.29 \| good
2026-06-29T19:00:00.000Z	44 \| good	7.612 \| good	23.43 \| good	47.619 \| good	0.707 \| good	6.289 \| good	0.264 \| good
2026-06-29T20:00:00.000Z	43 \| good	5.716 \| good	24.85 \| good	46.491 \| good	0.454 \| good	2.183 \| good	0.153 \| good
2026-06-29T21:00:00.000Z	39 \| good	6.16 \| good	26.936 \| good	42.229 \| good	0.487 \| good	2.773 \| good	0.155 \| good
2026-06-29T22:00:00.000Z	49 \| good	9 \| good	39.855 \| good	51.999 \| good	0.517 \| good	3.547 \| good	0.157 \| good
2026-06-29T23:00:00.000Z	50 \| good	7.532 \| good	33.302 \| good	53.795 \| good	0.535 \| good	5.72 \| good	0.167 \| good
2026-06-30T00:00:00.000Z	44 \| good	8.16 \| good	35.883 \| good	42.498 \| good	0.584 \| good	8.347 \| good	0.172 \| good
2026-06-30T01:00:00.000Z	38 \| good	6.872 \| good	30.573 \| good	34.186 \| good	0.64 \| good	11.36 \| good	0.179 \| good
2026-06-30T02:00:00.000Z	44 \| good	7.862 \| good	34.601 \| good	28.297 \| good	0.68 \| good	12.682 \| good	0.175 \| good
2026-06-30T03:00:00.000Z	44 \| good	8.209 \| good	35.965 \| good	24.572 \| good	0.698 \| good	14.018 \| good	0.17 \| good
2026-06-30T04:00:00.000Z	44 \| good	7.556 \| good	33.573 \| good	25.461 \| good	0.703 \| good	14.845 \| good	0.17 \| good
2026-06-30T05:00:00.000Z	38 \| good	7.118 \| good	31.557 \| good	26.432 \| good	0.696 \| good	14.264 \| good	0.17 \| good
2026-06-30T06:00:00.000Z	38 \| good	6.559 \| good	28.871 \| good	25.278 \| good	0.703 \| good	13.867 \| good	0.169 \| good
2026-06-30T07:00:00.000Z	33 \| good	6.323 \| good	27.71 \| good	20.777 \| good	0.711 \| good	13.275 \| good	0.169 \| good
2026-06-30T08:00:00.000Z	38 \| good	7.38 \| good	32.795 \| good	15.915 \| good	0.724 \| good	12.836 \| good	0.171 \| good
2026-06-30T09:00:00.000Z	44 \| good	8.398 \| good	37.101 \| good	13.347 \| good	0.742 \| good	12.812 \| good	0.173 \| good
2026-06-30T10:00:00.000Z	52 \| moderate	9.982 \| good	44.277 \| good	12.033 \| good	0.759 \| good	12.961 \| good	0.178 \| good
2026-06-30T11:00:00.000Z	54 \| moderate	11.239 \| good	49.917 \| good	16.652 \| good	0.754 \| good	11.574 \| good	0.185 \| good
2026-06-30T12:00:00.000Z	49 \| good	8.96 \| good	39.64 \| good	21.374 \| good	0.81 \| good	9.186 \| good	0.185 \| good
2026-06-30T13:00:00.000Z	49 \| good	9.308 \| good	41.436 \| good	27.964 \| good	0.829 \| good	7.638 \| good	0.186 \| good
2026-06-30T14:00:00.000Z	52 \| moderate	9.928 \| good	44.21 \| good	37.457 \| good	0.839 \| good	5.885 \| good	0.178 \| good
2026-06-30T15:00:00.000Z	58 \| moderate	12.826 \| fine	57.192 \| fine	47.727 \| good	0.814 \| good	4.54 \| good	0.171 \| good
2026-06-30T16:00:00.000Z	71 \| moderate	13.548 \| fine	60.332 \| fine	60.788 \| fine	0.725 \| good	3.511 \| good	0.165 \| good
2026-06-30T17:00:00.000Z	105 \| sensitive	11.103 \| good	49.873 \| good	71.639 \| moderate	0.665 \| good	2.645 \| good	0.159 \| good
2026-06-30T18:00:00.000Z	108 \| sensitive	9.979 \| good	44.287 \| good	72.935 \| moderate	0.629 \| good	2.221 \| good	0.154 \| good
2026-06-30T19:00:00.000Z	97 \| moderate	8.364 \| good	36.705 \| good	68.793 \| fine	0.614 \| good	2.166 \| good	0.15 \| good
2026-06-30T20:00:00.000Z	71 \| moderate	6.586 \| good	29.218 \| good	61.427 \| fine	0.562 \| good	2.225 \| good	0.146 \| good
2026-06-30T21:00:00.000Z	54 \| moderate	5.707 \| good	24.736 \| good	55.888 \| fine	0.501 \| good	2.542 \| good	0.145 \| good
2026-06-30T22:00:00.000Z	50 \| good	5.716 \| good	24.748 \| good	54.407 \| good	0.466 \| good	3.364 \| good	0.147 \| good
2026-06-30T23:00:00.000Z	45 \| good	6.324 \| good	27.87 \| good	48.906 \| good	0.453 \| good	4.835 \| good	0.152 \| good
2026-07-01T00:00:00.000Z	38 \| good	7.179 \| good	31.699 \| good	40.332 \| good	0.464 \| good	7.178 \| good	0.156 \| good
2026-07-01T01:00:00.000Z	49 \| good	8.684 \| good	38.084 \| good	34.709 \| good	0.492 \| good	9.1 \| good	0.16 \| good
2026-07-01T02:00:00.000Z	52 \| moderate	10.047 \| good	44.75 \| good	31.863 \| good	0.526 \| good	10.071 \| good	0.162 \| good
2026-07-01T03:00:00.000Z	33 \| good	5.666 \| good	24.666 \| good	29.566 \| good	0.55 \| good	10.205 \| good	0.159 \| good
2026-07-01T04:00:00.000Z	27 \| good	3.854 \| good	16.603 \| good	29.485 \| good	0.565 \| good	9.143 \| good	0.156 \| good
2026-07-01T05:00:00.000Z	28 \| good	3.321 \| good	14.19 \| good	29.956 \| good	0.569 \| good	7.769 \| good	0.153 \| good
2026-07-01T06:00:00.000Z	25 \| good	3.401 \| good	14.395 \| good	27.344 \| good	0.558 \| good	6.946 \| good	0.149 \| good
2026-07-01T07:00:00.000Z	22 \| good	3.999 \| good	17.232 \| good	21.805 \| good	0.52 \| good	6.236 \| good	0.143 \| good
2026-07-01T08:00:00.000Z	27 \| good	4.724 \| good	20.57 \| good	17.458 \| good	0.515 \| good	6.151 \| good	0.141 \| good
2026-07-01T09:00:00.000Z	22 \| good	3.556 \| good	15.273 \| good	15.781 \| good	0.532 \| good	6.277 \| good	0.141 \| good
2026-07-01T10:00:00.000Z	33 \| good	5.53 \| good	24.045 \| good	15.577 \| good	0.544 \| good	6.467 \| good	0.142 \| good
2026-07-01T11:00:00.000Z	44 \| good	7.817 \| good	34.521 \| good	20.983 \| good	0.562 \| good	6.111 \| good	0.144 \| good
2026-07-01T12:00:00.000Z	38 \| good	7.05 \| good	30.903 \| good	30.269 \| good	0.625 \| good	5.626 \| good	0.15 \| good
2026-07-01T13:00:00.000Z	54 \| moderate	11.051 \| good	49.164 \| good	41.782 \| good	0.677 \| good	5.012 \| good	0.16 \| good
2026-07-01T14:00:00.000Z	62 \| moderate	14.563 \| fine	65.176 \| fine	53.869 \| good	0.714 \| good	4.446 \| good	0.171 \| good
2026-07-01T15:00:00.000Z	77 \| moderate	17.744 \| fine	78.371 \| fine	63.459 \| fine	0.751 \| good	3.761 \| good	0.18 \| good
2026-07-01T16:00:00.000Z	108 \| sensitive	18.852 \| fine	83.339 \| fine	73.164 \| moderate	0.782 \| good	3.042 \| good	0.185 \| good
2026-07-01T17:00:00.000Z	105 \| sensitive	16.385 \| fine	72.908 \| fine	72.151 \| moderate	0.764 \| good	2.441 \| good	0.183 \| good
2026-07-01T18:00:00.000Z	87 \| moderate	16.522 \| fine	73.638 \| fine	65.687 \| fine	0.719 \| good	2.09 \| good	0.179 \| good
2026-07-01T19:00:00.000Z	67 \| moderate	18.171 \| fine	80.248 \| fine	59.873 \| fine	0.691 \| good	2.148 \| good	0.178 \| good

Greenwich, Connecticut live air quality index now

Major air pollutants in Greenwich, Connecticut

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Air quality in nearby cities

Port Chester, New York

Rye, New York

Stamford, Connecticut

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White Plains, New York

Mamaroneck, New York

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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 Greenwich, Connecticut?

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