What are the current PM10 levels at Chelsea, Massachusetts?

The current PM10 levels in Chelsea, Massachusetts are 13.873 μg/m3.

What are the current sulfur dioxide (SO2) levels at Chelsea, Massachusetts?

The current sulfur dioxide (SO2) levels in Chelsea, Massachusetts are 0.729 ppb.

What are the current ozone (O3) levels at Chelsea, Massachusetts?

The current ozone (O3) levels at Chelsea, Massachusetts is 21.854 ppm.

What are the current nitrogen dioxide (NO2) levels at Chelsea, Massachusetts?

The current nitrogen dioxide (NO2) levels at Chelsea, Massachusetts is 14.398 ppb.

Real-time air quality index in Chelsea, Massachusetts today

Q: What are the current PM2.5 levels in Chelsea, Massachusetts?

The measured PM2.5 levels in Chelsea, Massachusetts at present are 3.121 μg/m3.

Stay updated with real-time air quality in Chelsea, Massachusetts 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

Chelsea, Massachusetts

Last updated: ... (Local time)

Common air pollutants in Chelsea, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

3.12 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

13.87 μg/m³

155

255

425

605+

Ozone (O₃)

21.85 ppb

201

201+

Sulfur Dioxide (SO₂)

0.73 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

14.40 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.29 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Chelsea, Massachusetts

Scroll To Air Quality Map

Track live Chelsea, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-07T15:00:00.000Z	22 \| good	3.719 \| good	15.937 \| good	13.823 \| good	0.958 \| good	10.671 \| good	0.201 \| good
2026-10-07T16:00:00.000Z	22 \| good	3.703 \| good	16.005 \| good	20.061 \| good	0.954 \| good	6.208 \| good	0.201 \| good
2026-10-07T17:00:00.000Z	23 \| good	2.833 \| good	12.081 \| good	25.335 \| good	0.948 \| good	6.208 \| good	0.2 \| good
2026-10-07T18:00:00.000Z	26 \| good	2.337 \| good	10.161 \| good	27.715 \| good	0.737 \| good	6.036 \| good	0.2 \| good
2026-10-07T19:00:00.000Z	30 \| good	2.232 \| good	9.156 \| good	32.396 \| good	0.731 \| good	5.219 \| good	0.201 \| good
2026-10-07T20:00:00.000Z	32 \| good	2.318 \| good	10.054 \| good	34.535 \| good	0.778 \| good	6.968 \| good	0.201 \| good
2026-10-07T21:00:00.000Z	33 \| good	2.41 \| good	10.097 \| good	36.185 \| good	0.772 \| good	7.048 \| good	0.206 \| good
2026-10-07T22:00:00.000Z	32 \| good	2.498 \| good	10.039 \| good	34.746 \| good	0.766 \| good	6.326 \| good	0.201 \| good
2026-10-07T23:00:00.000Z	32 \| good	2.5 \| good	10.039 \| good	35.254 \| good	0.763 \| good	8.128 \| good	0.212 \| good
2026-10-08T00:00:00.000Z	31 \| good	2.602 \| good	10.967 \| good	34.12 \| good	0.82 \| good	9.149 \| good	0.259 \| good
2026-10-08T01:00:00.000Z	31 \| good	2.613 \| good	11.038 \| good	34.389 \| good	0.823 \| good	10.977 \| good	0.264 \| good
2026-10-08T02:00:00.000Z	31 \| good	2.903 \| good	12.012 \| good	32.516 \| good	0.781 \| good	11.389 \| good	0.264 \| good
2026-10-08T03:00:00.000Z	32 \| good	5.381 \| good	23 \| good	34.869 \| good	0.552 \| good	5.589 \| good	0.151 \| good
2026-10-08T04:00:00.000Z	33 \| good	3.108 \| good	13.887 \| good	36.332 \| good	0.738 \| good	6.099 \| good	0.231 \| good
2026-10-08T05:00:00.000Z	34 \| good	3.115 \| good	13.887 \| good	37.471 \| good	0.775 \| good	4.949 \| good	0.21 \| good
2026-10-08T06:00:00.000Z	36 \| good	3.119 \| good	13.887 \| good	38.689 \| good	0.775 \| good	4.595 \| good	0.224 \| good
2026-10-08T07:00:00.000Z	35 \| good	3.119 \| good	13.887 \| good	38.017 \| good	0.774 \| good	4.598 \| good	0.215 \| good
2026-10-08T08:00:00.000Z	35 \| good	3.22 \| good	13.926 \| good	38.178 \| good	0.767 \| good	5.052 \| good	0.181 \| good
2026-10-08T09:00:00.000Z	33 \| good	3.328 \| good	14.882 \| good	36.046 \| good	0.777 \| good	5.585 \| good	0.174 \| good
2026-10-08T10:00:00.000Z	33 \| good	3.436 \| good	14.975 \| good	36.187 \| good	0.776 \| good	7.45 \| good	0.196 \| good
2026-10-08T11:00:00.000Z	28 \| good	3.543 \| good	15.958 \| good	29.63 \| good	0.767 \| good	10.776 \| good	0.258 \| good
2026-10-08T12:00:00.000Z	27 \| good	3.833 \| good	16.932 \| good	28.774 \| good	0.778 \| good	12.98 \| good	0.301 \| good
2026-10-08T13:00:00.000Z	31 \| good	3.833 \| good	16.932 \| good	33.914 \| good	0.778 \| good	13.644 \| good	0.286 \| good
2026-10-08T14:00:00.000Z	31 \| good	4.527 \| good	19.886 \| good	34.282 \| good	0.828 \| good	9.942 \| good	0.212 \| good
2026-10-08T15:00:00.000Z	31 \| good	4.527 \| good	19.886 \| good	32.964 \| good	0.788 \| good	7.414 \| good	0.207 \| good
2026-10-08T16:00:00.000Z	32 \| good	5.1 \| good	21.879 \| good	35.066 \| good	0.888 \| good	6.468 \| good	0.212 \| good
2026-10-08T17:00:00.000Z	35 \| good	5.207 \| good	22.855 \| good	37.602 \| good	0.922 \| good	6.199 \| good	0.212 \| good
2026-10-08T18:00:00.000Z	36 \| good	4.822 \| good	21.042 \| good	39.036 \| good	0.823 \| good	5.438 \| good	0.206 \| good
2026-10-08T19:00:00.000Z	38 \| good	4.235 \| good	19.055 \| good	40.735 \| good	0.782 \| good	4.423 \| good	0.195 \| good
2026-10-08T20:00:00.000Z	41 \| good	3.54 \| good	16.118 \| good	43.799 \| good	0.737 \| good	4.097 \| good	0.2 \| good
2026-10-08T21:00:00.000Z	39 \| good	3.138 \| good	14.127 \| good	42.265 \| good	0.733 \| good	4.523 \| good	0.195 \| good
2026-10-08T22:00:00.000Z	38 \| good	2.853 \| good	12.202 \| good	41.427 \| good	0.726 \| good	6.042 \| good	0.205 \| good
2026-10-08T23:00:00.000Z	36 \| good	2.783 \| good	11.415 \| good	38.689 \| good	0.724 \| good	8.433 \| good	0.258 \| good
2026-10-09T00:00:00.000Z	31 \| good	2.891 \| good	12.3 \| good	33.684 \| good	0.77 \| good	11.427 \| good	0.304 \| good
2026-10-09T01:00:00.000Z	32 \| good	2.918 \| good	12.432 \| good	35.2 \| good	0.817 \| good	13.597 \| good	0.347 \| good
2026-10-09T02:00:00.000Z	32 \| good	3.072 \| good	12.292 \| good	35.295 \| good	0.733 \| good	9.066 \| good	0.258 \| good
2026-10-09T03:00:00.000Z	26 \| good	2.021 \| good	8.018 \| good	27.984 \| good	0.442 \| good	7.314 \| good	0.153 \| good
2026-10-09T04:00:00.000Z	29 \| good	2.657 \| good	11.215 \| good	31.431 \| good	0.738 \| good	8.551 \| good	0.3 \| good
2026-10-09T05:00:00.000Z	26 \| good	2.637 \| good	11.117 \| good	28.225 \| good	0.479 \| good	5.807 \| good	0.201 \| good
2026-10-09T06:00:00.000Z	26 \| good	2.637 \| good	11.117 \| good	28.44 \| good	0.479 \| good	5.587 \| good	0.201 \| good
2026-10-09T07:00:00.000Z	26 \| good	2.631 \| good	11.078 \| good	27.947 \| good	0.735 \| good	5.545 \| good	0.201 \| good
2026-10-09T08:00:00.000Z	25 \| good	2.722 \| good	11.018 \| good	27.162 \| good	0.793 \| good	6.519 \| good	0.196 \| good
2026-10-09T09:00:00.000Z	26 \| good	2.84 \| good	12.071 \| good	27.765 \| good	0.7 \| good	5.939 \| good	0.195 \| good
2026-10-09T10:00:00.000Z	22 \| good	2.94 \| good	12.059 \| good	24.494 \| good	0.743 \| good	7.904 \| good	0.21 \| good
2026-10-09T11:00:00.000Z	22 \| good	3.03 \| good	12.02 \| good	23.78 \| good	0.69 \| good	11.9 \| good	0.258 \| good
2026-10-09T12:00:00.000Z	21 \| good	3.121 \| good	13.873 \| good	22.744 \| good	0.731 \| good	14.603 \| good	0.299 \| good
2026-10-09T13:00:00.000Z	20 \| good	3.121 \| good	13.873 \| good	21.854 \| good	0.729 \| good	14.398 \| good	0.294 \| good
2026-10-09T14:00:00.000Z	21 \| good	3.003 \| good	11.972 \| good	22.765 \| good	0.732 \| good	6.532 \| good	0.212 \| good
2026-10-09T14:00:00.000Z	20 \| good	3.121 \| good	13.873 \| good	21.854 \| good	0.729 \| good	14.398 \| good	0.294 \| good
2026-10-09T14:00:00.000Z	24 \| good	1.633 \| good	6.973 \| good	26.341 \| good	0.569 \| good	4.468 \| good	0.156 \| good
2026-10-09T15:00:00.000Z	29 \| good	1.213 \| good	5.006 \| good	30.523 \| good	0.522 \| good	2.839 \| good	0.145 \| good
2026-10-09T16:00:00.000Z	31 \| good	2.202 \| good	9.008 \| good	32.787 \| good	0.476 \| good	1.757 \| good	0.141 \| good
2026-10-09T17:00:00.000Z	31 \| good	3.005 \| good	12.061 \| good	33.884 \| good	0.47 \| good	1.287 \| good	0.14 \| good
2026-10-09T18:00:00.000Z	32 \| good	2.244 \| good	9.032 \| good	34.683 \| good	0.477 \| good	1.18 \| good	0.141 \| good
2026-10-09T19:00:00.000Z	31 \| good	1.704 \| good	7.008 \| good	33.873 \| good	0.472 \| good	1.221 \| good	0.143 \| good
2026-10-09T20:00:00.000Z	30 \| good	1.445 \| good	6.012 \| good	32.086 \| good	0.462 \| good	1.398 \| good	0.145 \| good
2026-10-09T21:00:00.000Z	28 \| good	1.244 \| good	5.034 \| good	29.827 \| good	0.456 \| good	2 \| good	0.15 \| good
2026-10-09T22:00:00.000Z	25 \| good	1.364 \| good	5.059 \| good	26.571 \| good	0.467 \| good	3.782 \| good	0.161 \| good
2026-10-09T23:00:00.000Z	23 \| good	2.157 \| good	8.989 \| good	24.537 \| good	0.494 \| good	5.723 \| good	0.172 \| good
2026-10-10T00:00:00.000Z	22 \| good	3.609 \| good	15.925 \| good	18.989 \| good	0.513 \| good	6.505 \| good	0.174 \| good
2026-10-10T01:00:00.000Z	27 \| good	4.853 \| good	20.928 \| good	15.092 \| good	0.511 \| good	5.472 \| good	0.165 \| good
2026-10-10T02:00:00.000Z	22 \| good	4.152 \| good	17.921 \| good	14.845 \| good	0.519 \| good	4.727 \| good	0.16 \| good
2026-10-10T03:00:00.000Z	16 \| good	2.474 \| good	9.982 \| good	17.037 \| good	0.533 \| good	4.467 \| good	0.159 \| good
2026-10-10T04:00:00.000Z	17 \| good	1.749 \| good	7 \| good	17.91 \| good	0.535 \| good	4.104 \| good	0.16 \| good
2026-10-10T05:00:00.000Z	18 \| good	1.799 \| good	7.961 \| good	18.908 \| good	0.52 \| good	4.096 \| good	0.16 \| good
2026-10-10T06:00:00.000Z	20 \| good	2.197 \| good	8.993 \| good	21.554 \| good	0.5 \| good	4.428 \| good	0.161 \| good
2026-10-10T07:00:00.000Z	18 \| good	3.066 \| good	12.065 \| good	18.733 \| good	0.477 \| good	5.095 \| good	0.163 \| good
2026-10-10T08:00:00.000Z	22 \| good	3.516 \| good	15.945 \| good	17.355 \| good	0.462 \| good	5.851 \| good	0.165 \| good
2026-10-10T09:00:00.000Z	22 \| good	3.835 \| good	16.975 \| good	13.8 \| good	0.444 \| good	6.679 \| good	0.168 \| good
2026-10-10T10:00:00.000Z	22 \| good	4.335 \| good	18.981 \| good	12.143 \| good	0.435 \| good	8.07 \| good	0.174 \| good
2026-10-10T11:00:00.000Z	22 \| good	4.231 \| good	18.919 \| good	12.517 \| good	0.459 \| good	11.133 \| good	0.191 \| good
2026-10-10T12:00:00.000Z	27 \| good	4.552 \| good	19.962 \| good	14.028 \| good	0.487 \| good	11.022 \| good	0.218 \| good
2026-10-10T13:00:00.000Z	16 \| good	3.161 \| good	13.956 \| good	17.117 \| good	0.407 \| good	5.457 \| good	0.174 \| good
2026-10-10T14:00:00.000Z	19 \| good	2.282 \| good	9.043 \| good	20.605 \| good	0.319 \| good	2.485 \| good	0.148 \| good
2026-10-10T15:00:00.000Z	22 \| good	2.48 \| good	10.013 \| good	23.894 \| good	0.302 \| good	1.937 \| good	0.144 \| good
2026-10-10T16:00:00.000Z	24 \| good	1.707 \| good	7.039 \| good	26.345 \| good	0.3 \| good	1.626 \| good	0.143 \| good
2026-10-10T17:00:00.000Z	27 \| good	1.449 \| good	6.011 \| good	28.837 \| good	0.302 \| good	1.422 \| good	0.143 \| good
2026-10-10T18:00:00.000Z	27 \| good	1.629 \| good	7.005 \| good	28.536 \| good	0.306 \| good	1.336 \| good	0.143 \| good
2026-10-10T19:00:00.000Z	26 \| good	2.089 \| good	8.083 \| good	28.26 \| good	0.31 \| good	1.417 \| good	0.144 \| good
2026-10-10T20:00:00.000Z	26 \| good	2.327 \| good	9.968 \| good	28.085 \| good	0.317 \| good	1.73 \| good	0.145 \| good
2026-10-10T21:00:00.000Z	23 \| good	3.243 \| good	14.018 \| good	24.555 \| good	0.329 \| good	2.661 \| good	0.151 \| good
2026-10-10T22:00:00.000Z	33 \| good	6.176 \| good	26.987 \| good	19.108 \| good	0.401 \| good	11.706 \| good	0.206 \| good
2026-10-10T23:00:00.000Z	44 \| good	7.607 \| good	33.887 \| good	15.071 \| good	0.572 \| good	22.264 \| good	0.286 \| good
2026-10-11T00:00:00.000Z	38 \| good	7.139 \| good	31.914 \| good	15.866 \| good	0.757 \| good	24.844 \| good	0.352 \| good
2026-10-11T01:00:00.000Z	38 \| good	7.236 \| good	31.961 \| good	18.253 \| good	0.87 \| good	25.187 \| good	0.379 \| good
2026-10-11T02:00:00.000Z	38 \| good	6.538 \| good	28.976 \| good	19.78 \| good	0.909 \| good	24.738 \| good	0.383 \| good
2026-10-11T03:00:00.000Z	27 \| good	5.382 \| good	23.062 \| good	20.981 \| good	0.889 \| good	24.238 \| good	0.373 \| good
2026-10-11T04:00:00.000Z	27 \| good	5.1 \| good	22.033 \| good	20.195 \| good	0.856 \| good	23.829 \| good	0.366 \| good
2026-10-11T05:00:00.000Z	27 \| good	4.911 \| good	21.046 \| good	19.878 \| good	0.818 \| good	23.224 \| good	0.367 \| good
2026-10-11T06:00:00.000Z	27 \| good	4.737 \| good	20.953 \| good	19.87 \| good	0.811 \| good	22.897 \| good	0.375 \| good
2026-10-11T07:00:00.000Z	27 \| good	5.467 \| good	23.053 \| good	17.762 \| good	0.808 \| good	22.653 \| good	0.386 \| good
2026-10-11T08:00:00.000Z	38 \| good	6.613 \| good	29.926 \| good	14.566 \| good	0.8 \| good	22.299 \| good	0.395 \| good
2026-10-11T09:00:00.000Z	38 \| good	7.269 \| good	31.984 \| good	13.751 \| good	0.754 \| good	21.993 \| good	0.397 \| good
2026-10-11T10:00:00.000Z	38 \| good	7.278 \| good	31.965 \| good	12.7 \| good	0.688 \| good	21.665 \| good	0.378 \| good
2026-10-11T11:00:00.000Z	38 \| good	6.868 \| good	29.973 \| good	11.54 \| good	0.674 \| good	21.721 \| good	0.366 \| good
2026-10-11T12:00:00.000Z	75 \| moderate	21.916 \| fine	23.053 \| good	7.983 \| good	0.674 \| good	20.745 \| good	0.357 \| good
2026-10-11T13:00:00.000Z	67 \| moderate	18.48 \| fine	19.497 \| good	10.985 \| good	0.651 \| good	18.507 \| good	0.322 \| good

Chelsea

Empower business decisions with accurate air quality data

Chelsea, Massachusetts air quality map: Real-time AQI near you

0.29ppm

How accurate is Massachusetts, USA air quality data?

Air quality measurements for Massachusetts, 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 Chelsea, Massachusetts updated?

Air quality data for Chelsea, Massachusetts is updated on an hourly basis.

When did Chelsea, Massachusetts experience the worst air quality in the last 24 hours?

The worst air quality in Chelsea, Massachusetts was recorded at 08:00:00 on 2026-10-08.

When did Chelsea, Massachusetts have its best air quality in the last 24 hours?

The best air quality in Chelsea, Massachusetts was recorded at 12:00:00 on 2026-10-09.

What is the real-time air quality index for Chelsea, Massachusetts?

The real-time air quality index in Chelsea, Massachusetts is 20, currently categorized as Good.

Which pollutant is found most often in Chelsea, Massachusetts?

The most common pollutant in Chelsea, Massachusetts is O3.

What can I do if the air quality in Chelsea, Massachusetts is poor?

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

What are the current PM_2.5 levels in Chelsea, Massachusetts?

The measured PM_2.5 levels in Chelsea, Massachusetts at present are 3.121 μg/m³.

What are the current PM₁₀ levels at Chelsea, Massachusetts?

The current PM₁₀ levels in Chelsea, Massachusetts are 13.873 μg/m³.

What are the current carbon monoxide (CO) levels at Chelsea, Massachusetts?

The current carbon monoxide (CO) level in Chelsea, Massachusetts is 0.294 ppm.

What are the current sulfur dioxide (SO₂) levels at Chelsea, Massachusetts?

The current sulfur dioxide (SO₂) levels in Chelsea, Massachusetts are 0.729 ppb.

What are the current ozone (O₃) levels at Chelsea, Massachusetts?

The current ozone (O₃) levels at Chelsea, Massachusetts is 21.854 ppm.

What are the current nitrogen dioxide (NO₂) levels at Chelsea, Massachusetts?

The current nitrogen dioxide (NO₂) levels at Chelsea, Massachusetts is 14.398 ppb.

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