What are the current PM10 levels at Harwich, Massachusetts?

The current PM10 levels in Harwich, Massachusetts are 13.401 μg/m3.

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

The current sulfur dioxide (SO2) levels in Harwich, Massachusetts are 0.674 ppb.

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

The current ozone (O3) levels at Harwich, Massachusetts is 20.916 ppm.

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

The current nitrogen dioxide (NO2) levels at Harwich, Massachusetts is 7.356 ppb.

Real-time air quality index in Harwich, Massachusetts today

Name: Live air pollution levels in Harwich, Massachusetts today
Creator: Ambee

Stay updated with real-time air quality in Harwich, 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

Harwich, Massachusetts

Last updated: ... (Local time)

Common air pollutants in Harwich, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

8.11 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

27.14 μg/m³

155

255

425

605+

Ozone (O₃)

24.89 ppb

201

201+

Sulfur Dioxide (SO₂)

0.40 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.71 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.55 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Harwich, Massachusetts

Get Live Pollen Counts

Harwich, Massachusetts

Scroll To Air Quality Map

Track live Harwich, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-13T07:00:00.000Z	22 \| good	4.415 \| good	13.286 \| good	24.168 \| good	0.335 \| good	7.157 \| good	0.364 \| good
2025-09-13T08:00:00.000Z	22 \| good	3.666 \| good	12.34 \| good	20.941 \| good	0.355 \| good	7.254 \| good	0.327 \| good
2025-09-13T09:00:00.000Z	22 \| good	4.298 \| good	17.684 \| good	21.004 \| good	0.396 \| good	5.868 \| good	0.289 \| good
2025-09-13T10:00:00.000Z	27 \| good	5.091 \| good	15.503 \| good	22.414 \| good	0.396 \| good	4.2 \| good	0.343 \| good
2025-09-13T11:00:00.000Z	27 \| good	4.75 \| good	12.628 \| good	21.534 \| good	0.391 \| good	4.082 \| good	0.37 \| good
2025-09-13T12:00:00.000Z	19 \| good	3.401 \| good	8.164 \| good	19.766 \| good	0.437 \| good	5.423 \| good	0.431 \| good
2025-09-13T13:00:00.000Z	16 \| good	3.291 \| good	9.145 \| good	15.796 \| good	0.497 \| good	6.115 \| good	0.314 \| good
2025-09-13T14:00:00.000Z	33 \| good	5.963 \| good	14.452 \| good	19.789 \| good	0.484 \| good	6.067 \| good	0.227 \| good
2025-09-13T15:00:00.000Z	22 \| good	3.77 \| good	11.736 \| good	22.662 \| good	0.422 \| good	4.057 \| good	0.204 \| good
2025-09-13T16:00:00.000Z	24 \| good	3.508 \| good	9.637 \| good	25.645 \| good	0.387 \| good	2.873 \| good	0.204 \| good
2025-09-13T17:00:00.000Z	26 \| good	4.198 \| good	9.562 \| good	27.553 \| good	0.484 \| good	3.084 \| good	0.185 \| good
2025-09-13T18:00:00.000Z	28 \| good	3.453 \| good	10.909 \| good	29.696 \| good	0.449 \| good	1.986 \| good	0.185 \| good
2025-09-13T19:00:00.000Z	29 \| good	3.355 \| good	11.769 \| good	31.228 \| good	0.449 \| good	1.545 \| good	0.185 \| good
2025-09-13T20:00:00.000Z	31 \| good	3.754 \| good	10.744 \| good	32.656 \| good	0.391 \| good	2.29 \| good	0.208 \| good
2025-09-13T21:00:00.000Z	31 \| good	4.175 \| good	10.34 \| good	33.803 \| good	0.464 \| good	1.885 \| good	0.23 \| good
2025-09-13T22:00:00.000Z	31 \| good	3.529 \| good	9.679 \| good	33.34 \| good	0.444 \| good	2.196 \| good	0.23 \| good
2025-09-13T23:00:00.000Z	30 \| good	2.789 \| good	26.237 \| good	31.635 \| good	0.427 \| good	2.485 \| good	0.2 \| good
2025-09-14T00:00:00.000Z	28 \| good	3.307 \| good	10.106 \| good	30.481 \| good	0.42 \| good	3.279 \| good	0.242 \| good
2025-09-14T01:00:00.000Z	28 \| good	3.61 \| good	12.883 \| good	29.68 \| good	0.464 \| good	3.446 \| good	0.261 \| good
2025-09-14T02:00:00.000Z	28 \| good	4.581 \| good	16.886 \| good	30.166 \| good	0.404 \| good	3.617 \| good	0.281 \| good
2025-09-14T03:00:00.000Z	21 \| good	0.45 \| good	2 \| good	22.575 \| good	0.237 \| good	1.22 \| good	0.131 \| good
2025-09-14T04:00:00.000Z	25 \| good	3.882 \| good	26.921 \| good	26.483 \| good	0.398 \| good	3.12 \| good	0.268 \| good
2025-09-14T05:00:00.000Z	27 \| good	3.229 \| good	22.897 \| good	28.708 \| good	0.383 \| good	4.889 \| good	0.242 \| good
2025-09-14T06:00:00.000Z	23 \| good	3.175 \| good	18.191 \| good	24.944 \| good	0.407 \| good	3.101 \| good	0.223 \| good
2025-09-14T07:00:00.000Z	22 \| good	2.719 \| good	12.264 \| good	24.191 \| good	0.387 \| good	3.659 \| good	0.245 \| good
2025-09-14T08:00:00.000Z	19 \| good	2.737 \| good	13.75 \| good	20.694 \| good	0.407 \| good	2.614 \| good	0.245 \| good
2025-09-14T09:00:00.000Z	19 \| good	2.383 \| good	7.901 \| good	19.513 \| good	0.362 \| good	2.551 \| good	0.223 \| good
2025-09-14T10:00:00.000Z	23 \| good	4.189 \| good	15.873 \| good	25.374 \| good	0.387 \| good	3.59 \| good	0.208 \| good
2025-09-14T11:00:00.000Z	22 \| good	4.399 \| good	24.473 \| good	23.066 \| good	0.403 \| good	4.945 \| good	0.228 \| good
2025-09-14T12:00:00.000Z	23 \| good	3.96 \| good	9.597 \| good	25.131 \| good	0.387 \| good	5.624 \| good	0.269 \| good
2025-09-14T13:00:00.000Z	22 \| good	4.466 \| good	22.52 \| good	19.232 \| good	0.561 \| good	5.269 \| good	0.329 \| good
2025-09-14T14:00:00.000Z	27 \| good	4.727 \| good	17.208 \| good	23.791 \| good	0.49 \| good	4.709 \| good	0.284 \| good
2025-09-14T15:00:00.000Z	33 \| good	5.679 \| good	17.416 \| good	28.239 \| good	0.415 \| good	2.938 \| good	0.265 \| good
2025-09-14T16:00:00.000Z	33 \| good	6.353 \| good	21.681 \| good	27.377 \| good	0.45 \| good	2.754 \| good	0.261 \| good
2025-09-14T17:00:00.000Z	33 \| good	6.498 \| good	24.479 \| good	34.017 \| good	0.47 \| good	3.673 \| good	0.258 \| good
2025-09-14T18:00:00.000Z	36 \| good	6.345 \| good	21.841 \| good	39.162 \| good	0.453 \| good	3.465 \| good	0.242 \| good
2025-09-14T19:00:00.000Z	38 \| good	6.79 \| good	21.854 \| good	41.072 \| good	0.493 \| good	3.151 \| good	0.223 \| good
2025-09-14T20:00:00.000Z	38 \| good	6.561 \| good	12.41 \| good	40.627 \| good	0.487 \| good	3.104 \| good	0.242 \| good
2025-09-14T21:00:00.000Z	38 \| good	6.507 \| good	18.799 \| good	41.422 \| good	0.486 \| good	3.007 \| good	0.223 \| good
2025-09-14T22:00:00.000Z	39 \| good	6.483 \| good	23.342 \| good	41.917 \| good	0.466 \| good	1.943 \| good	0.223 \| good
2025-09-14T23:00:00.000Z	38 \| good	6.612 \| good	19.468 \| good	39.053 \| good	0.545 \| good	2.994 \| good	0.24 \| good
2025-09-15T00:00:00.000Z	38 \| good	7.44 \| good	26.954 \| good	35.802 \| good	0.455 \| good	4.969 \| good	0.304 \| good
2025-09-15T01:00:00.000Z	38 \| good	6.913 \| good	27.823 \| good	34.909 \| good	0.452 \| good	2.852 \| good	0.366 \| good
2025-09-15T02:00:00.000Z	38 \| good	7.117 \| good	28.046 \| good	33.573 \| good	0.497 \| good	3.106 \| good	0.453 \| good
2025-09-15T03:00:00.000Z	38 \| good	7.115 \| good	27.979 \| good	33.486 \| good	0.502 \| good	4.11 \| good	0.547 \| good
2025-09-15T04:00:00.000Z	38 \| good	7.298 \| good	27.414 \| good	28.267 \| good	0.464 \| good	4.159 \| good	0.611 \| good
2025-09-15T05:00:00.000Z	44 \| good	8.113 \| good	27.141 \| good	24.89 \| good	0.398 \| good	4.709 \| good	0.55 \| good
2025-09-15T06:00:00.000Z	44 \| good	7.989 \| good	27.304 \| good	19.096 \| good	0.468 \| good	4.644 \| good	0.482 \| good
2025-09-15T06:00:00.000Z	44 \| good	8.113 \| good	27.141 \| good	24.89 \| good	0.398 \| good	4.709 \| good	0.55 \| good
2025-09-11T15:00:00.000Z	30 \| good	2.638 \| good	10.418 \| good	31.663 \| good	0.236 \| good	0.756 \| good	0.147 \| good
2025-09-11T16:00:00.000Z	31 \| good	3.572 \| good	15.98 \| good	33.318 \| good	0.257 \| good	0.716 \| good	0.149 \| good
2025-09-11T17:00:00.000Z	32 \| good	3.599 \| good	16.014 \| good	34.953 \| good	0.279 \| good	0.676 \| good	0.152 \| good
2025-09-11T18:00:00.000Z	32 \| good	4.318 \| good	18.998 \| good	35.156 \| good	0.301 \| good	0.637 \| good	0.155 \| good
2025-09-11T19:00:00.000Z	31 \| good	5.144 \| good	22.12 \| good	34.225 \| good	0.311 \| good	0.808 \| good	0.157 \| good
2025-09-11T20:00:00.000Z	32 \| good	5.23 \| good	23 \| good	34.949 \| good	0.322 \| good	0.979 \| good	0.159 \| good
2025-09-11T21:00:00.000Z	31 \| good	3.904 \| good	16.969 \| good	33.579 \| good	0.333 \| good	1.15 \| good	0.161 \| good
2025-09-11T22:00:00.000Z	30 \| good	2.544 \| good	10 \| good	31.913 \| good	0.383 \| good	1.874 \| good	0.167 \| good
2025-09-11T23:00:00.000Z	27 \| good	2.625 \| good	10.848 \| good	29.349 \| good	0.433 \| good	2.599 \| good	0.172 \| good
2025-09-12T00:00:00.000Z	24 \| good	3.559 \| good	15.913 \| good	25.949 \| good	0.483 \| good	3.323 \| good	0.177 \| good
2025-09-12T01:00:00.000Z	27 \| good	4.65 \| good	19.969 \| good	26.731 \| good	0.548 \| good	3.774 \| good	0.183 \| good
2025-09-12T02:00:00.000Z	27 \| good	5.479 \| good	23.498 \| good	25.158 \| good	0.614 \| good	4.224 \| good	0.188 \| good
2025-09-12T03:00:00.000Z	33 \| good	5.837 \| good	25.15 \| good	29.107 \| good	0.679 \| good	4.675 \| good	0.194 \| good
2025-09-12T04:00:00.000Z	33 \| good	6.064 \| good	27.049 \| good	28.65 \| good	0.668 \| good	4.724 \| good	0.197 \| good
2025-09-12T05:00:00.000Z	38 \| good	6.946 \| good	30.596 \| good	28.807 \| good	0.658 \| good	4.773 \| good	0.201 \| good
2025-09-12T06:00:00.000Z	49 \| good	8.776 \| good	38.747 \| good	27.382 \| good	0.647 \| good	4.822 \| good	0.204 \| good
2025-09-12T07:00:00.000Z	52 \| moderate	10.033 \| good	44.778 \| good	30.008 \| good	0.48 \| good	3.406 \| good	0.191 \| good
2025-09-12T08:00:00.000Z	52 \| moderate	9.691 \| good	42.947 \| good	27.793 \| good	0.314 \| good	1.991 \| good	0.177 \| good
2025-09-12T09:00:00.000Z	27 \| good	4.734 \| good	20.488 \| good	22.334 \| good	0.147 \| good	0.575 \| good	0.164 \| good
2025-09-12T10:00:00.000Z	20 \| good	3.162 \| good	13.759 \| good	22.185 \| good	0.112 \| good	0.512 \| good	0.157 \| good
2025-09-12T11:00:00.000Z	19 \| good	2.1 \| good	8.557 \| good	20.536 \| good	0.076 \| good	0.449 \| good	0.151 \| good
2025-09-12T12:00:00.000Z	19 \| good	2.787 \| good	11.405 \| good	20.478 \| good	0.041 \| good	0.387 \| good	0.144 \| good
2025-09-12T13:00:00.000Z	19 \| good	2.918 \| good	12.213 \| good	21.356 \| good	0.043 \| good	0.34 \| good	0.141 \| good
2025-09-12T14:00:00.000Z	20 \| good	2.777 \| good	11.339 \| good	22.333 \| good	0.044 \| good	0.292 \| good	0.137 \| good
2025-09-12T15:00:00.000Z	20 \| good	2.361 \| good	9.88 \| good	22.376 \| good	0.046 \| good	0.245 \| good	0.134 \| good
2025-09-12T16:00:00.000Z	21 \| good	2.285 \| good	9.557 \| good	22.956 \| good	0.053 \| good	0.242 \| good	0.133 \| good
2025-09-12T17:00:00.000Z	22 \| good	1.612 \| good	6.58 \| good	23.503 \| good	0.059 \| good	0.239 \| good	0.133 \| good
2025-09-12T18:00:00.000Z	22 \| good	1.239 \| good	5 \| good	23.856 \| good	0.066 \| good	0.235 \| good	0.132 \| good
2025-09-12T19:00:00.000Z	22 \| good	0.949 \| good	3.88 \| good	23.7 \| good	0.062 \| good	0.275 \| good	0.132 \| good
2025-09-12T20:00:00.000Z	21 \| good	0.876 \| good	3.122 \| good	23.372 \| good	0.059 \| good	0.315 \| good	0.131 \| good
2025-09-12T21:00:00.000Z	21 \| good	0.241 \| good	0.79 \| good	22.7 \| good	0.056 \| good	0.354 \| good	0.131 \| good
2025-09-12T22:00:00.000Z	20 \| good	0.912 \| good	3.709 \| good	22.095 \| good	0.054 \| good	0.426 \| good	0.13 \| good
2025-09-12T23:00:00.000Z	19 \| good	0.926 \| good	3.709 \| good	19.854 \| good	0.053 \| good	0.497 \| good	0.13 \| good
2025-09-13T00:00:00.000Z	21 \| good	0.883 \| good	3.505 \| good	22.771 \| good	0.051 \| good	0.568 \| good	0.129 \| good
2025-09-13T01:00:00.000Z	19 \| good	0.869 \| good	3 \| good	20.661 \| good	0.057 \| good	0.574 \| good	0.128 \| good
2025-09-13T02:00:00.000Z	18 \| good	0.883 \| good	3 \| good	19.308 \| good	0.063 \| good	0.58 \| good	0.128 \| good
2025-09-13T03:00:00.000Z	18 \| good	0.303 \| good	1 \| good	19.202 \| good	0.069 \| good	0.585 \| good	0.127 \| good
2025-09-13T04:00:00.000Z	17 \| good	1.086 \| good	4.531 \| good	17.979 \| good	0.079 \| good	0.602 \| good	0.127 \| good
2025-09-13T05:00:00.000Z	18 \| good	1.169 \| good	4.88 \| good	18.841 \| good	0.089 \| good	0.619 \| good	0.128 \| good
2025-09-13T06:00:00.000Z	17 \| good	1.132 \| good	4.612 \| good	17.983 \| good	0.099 \| good	0.636 \| good	0.128 \| good
2025-09-13T07:00:00.000Z	16 \| good	1.016 \| good	4.035 \| good	17.088 \| good	0.108 \| good	0.667 \| good	0.129 \| good
2025-09-13T08:00:00.000Z	15 \| good	0.952 \| good	3.913 \| good	16.054 \| good	0.116 \| good	0.699 \| good	0.13 \| good
2025-09-13T09:00:00.000Z	14 \| good	0.801 \| good	2.977 \| good	15.398 \| good	0.125 \| good	0.731 \| good	0.131 \| good
2025-09-13T10:00:00.000Z	14 \| good	0.664 \| good	2.129 \| good	15.053 \| good	0.138 \| good	0.78 \| good	0.133 \| good
2025-09-13T11:00:00.000Z	13 \| good	0.655 \| good	2.066 \| good	13.601 \| good	0.151 \| good	0.828 \| good	0.134 \| good
2025-09-13T12:00:00.000Z	17 \| good	0.811 \| good	3.064 \| good	17.789 \| good	0.165 \| good	0.877 \| good	0.136 \| good
2025-09-13T13:00:00.000Z	20 \| good	1.133 \| good	5 \| good	22.422 \| good	0.169 \| good	0.716 \| good	0.134 \| good
2025-09-13T14:00:00.000Z	23 \| good	1.005 \| good	3.805 \| good	25.265 \| good	0.174 \| good	0.556 \| good	0.133 \| good

Harwich

Empower business decisions with accurate air quality data

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

0.42ppm

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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Check live rankings of places in the USA affected by air pollution.

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Frequently asked questions

How frequently is the air quality data for Harwich, Massachusetts updated?

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

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

The worst air quality in Harwich, Massachusetts was recorded at 10:00:00 on 2025-09-10.

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

The best air quality in Harwich, Massachusetts was recorded at 01:00:00 on 2025-09-11.

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

The real-time air quality index in Harwich, Massachusetts is 19, currently categorized as Good.

Which pollutant is found most often in Harwich, Massachusetts?

The most common pollutant in Harwich, Massachusetts is O3.

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

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

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

The measured PM_2.5 levels in Harwich, Massachusetts at present are 3.283 μg/m³.

What are the current PM₁₀ levels at Harwich, Massachusetts?

The current PM₁₀ levels in Harwich, Massachusetts are 13.401 μg/m³.

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

The current carbon monoxide (CO) level in Harwich, Massachusetts is 0.242 ppm.

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

The current sulfur dioxide (SO₂) levels in Harwich, Massachusetts are 0.674 ppb.

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

The current ozone (O₃) levels at Harwich, Massachusetts is 20.916 ppm.

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

The current nitrogen dioxide (NO₂) levels at Harwich, Massachusetts is 7.356 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-13T07:00:00.000Z	22 \| good	4.415 \| good	13.286 \| good	24.168 \| good	0.335 \| good	7.157 \| good	0.364 \| good
2025-09-13T08:00:00.000Z	22 \| good	3.666 \| good	12.34 \| good	20.941 \| good	0.355 \| good	7.254 \| good	0.327 \| good
2025-09-13T09:00:00.000Z	22 \| good	4.298 \| good	17.684 \| good	21.004 \| good	0.396 \| good	5.868 \| good	0.289 \| good
2025-09-13T10:00:00.000Z	27 \| good	5.091 \| good	15.503 \| good	22.414 \| good	0.396 \| good	4.2 \| good	0.343 \| good
2025-09-13T11:00:00.000Z	27 \| good	4.75 \| good	12.628 \| good	21.534 \| good	0.391 \| good	4.082 \| good	0.37 \| good
2025-09-13T12:00:00.000Z	19 \| good	3.401 \| good	8.164 \| good	19.766 \| good	0.437 \| good	5.423 \| good	0.431 \| good
2025-09-13T13:00:00.000Z	16 \| good	3.291 \| good	9.145 \| good	15.796 \| good	0.497 \| good	6.115 \| good	0.314 \| good
2025-09-13T14:00:00.000Z	33 \| good	5.963 \| good	14.452 \| good	19.789 \| good	0.484 \| good	6.067 \| good	0.227 \| good
2025-09-13T15:00:00.000Z	22 \| good	3.77 \| good	11.736 \| good	22.662 \| good	0.422 \| good	4.057 \| good	0.204 \| good
2025-09-13T16:00:00.000Z	24 \| good	3.508 \| good	9.637 \| good	25.645 \| good	0.387 \| good	2.873 \| good	0.204 \| good
2025-09-13T17:00:00.000Z	26 \| good	4.198 \| good	9.562 \| good	27.553 \| good	0.484 \| good	3.084 \| good	0.185 \| good
2025-09-13T18:00:00.000Z	28 \| good	3.453 \| good	10.909 \| good	29.696 \| good	0.449 \| good	1.986 \| good	0.185 \| good
2025-09-13T19:00:00.000Z	29 \| good	3.355 \| good	11.769 \| good	31.228 \| good	0.449 \| good	1.545 \| good	0.185 \| good
2025-09-13T20:00:00.000Z	31 \| good	3.754 \| good	10.744 \| good	32.656 \| good	0.391 \| good	2.29 \| good	0.208 \| good
2025-09-13T21:00:00.000Z	31 \| good	4.175 \| good	10.34 \| good	33.803 \| good	0.464 \| good	1.885 \| good	0.23 \| good
2025-09-13T22:00:00.000Z	31 \| good	3.529 \| good	9.679 \| good	33.34 \| good	0.444 \| good	2.196 \| good	0.23 \| good
2025-09-13T23:00:00.000Z	30 \| good	2.789 \| good	26.237 \| good	31.635 \| good	0.427 \| good	2.485 \| good	0.2 \| good
2025-09-14T00:00:00.000Z	28 \| good	3.307 \| good	10.106 \| good	30.481 \| good	0.42 \| good	3.279 \| good	0.242 \| good
2025-09-14T01:00:00.000Z	28 \| good	3.61 \| good	12.883 \| good	29.68 \| good	0.464 \| good	3.446 \| good	0.261 \| good
2025-09-14T02:00:00.000Z	28 \| good	4.581 \| good	16.886 \| good	30.166 \| good	0.404 \| good	3.617 \| good	0.281 \| good
2025-09-14T03:00:00.000Z	21 \| good	0.45 \| good	2 \| good	22.575 \| good	0.237 \| good	1.22 \| good	0.131 \| good
2025-09-14T04:00:00.000Z	25 \| good	3.882 \| good	26.921 \| good	26.483 \| good	0.398 \| good	3.12 \| good	0.268 \| good
2025-09-14T05:00:00.000Z	27 \| good	3.229 \| good	22.897 \| good	28.708 \| good	0.383 \| good	4.889 \| good	0.242 \| good
2025-09-14T06:00:00.000Z	23 \| good	3.175 \| good	18.191 \| good	24.944 \| good	0.407 \| good	3.101 \| good	0.223 \| good
2025-09-14T07:00:00.000Z	22 \| good	2.719 \| good	12.264 \| good	24.191 \| good	0.387 \| good	3.659 \| good	0.245 \| good
2025-09-14T08:00:00.000Z	19 \| good	2.737 \| good	13.75 \| good	20.694 \| good	0.407 \| good	2.614 \| good	0.245 \| good
2025-09-14T09:00:00.000Z	19 \| good	2.383 \| good	7.901 \| good	19.513 \| good	0.362 \| good	2.551 \| good	0.223 \| good
2025-09-14T10:00:00.000Z	23 \| good	4.189 \| good	15.873 \| good	25.374 \| good	0.387 \| good	3.59 \| good	0.208 \| good
2025-09-14T11:00:00.000Z	22 \| good	4.399 \| good	24.473 \| good	23.066 \| good	0.403 \| good	4.945 \| good	0.228 \| good
2025-09-14T12:00:00.000Z	23 \| good	3.96 \| good	9.597 \| good	25.131 \| good	0.387 \| good	5.624 \| good	0.269 \| good
2025-09-14T13:00:00.000Z	22 \| good	4.466 \| good	22.52 \| good	19.232 \| good	0.561 \| good	5.269 \| good	0.329 \| good
2025-09-14T14:00:00.000Z	27 \| good	4.727 \| good	17.208 \| good	23.791 \| good	0.49 \| good	4.709 \| good	0.284 \| good
2025-09-14T15:00:00.000Z	33 \| good	5.679 \| good	17.416 \| good	28.239 \| good	0.415 \| good	2.938 \| good	0.265 \| good
2025-09-14T16:00:00.000Z	33 \| good	6.353 \| good	21.681 \| good	27.377 \| good	0.45 \| good	2.754 \| good	0.261 \| good
2025-09-14T17:00:00.000Z	33 \| good	6.498 \| good	24.479 \| good	34.017 \| good	0.47 \| good	3.673 \| good	0.258 \| good
2025-09-14T18:00:00.000Z	36 \| good	6.345 \| good	21.841 \| good	39.162 \| good	0.453 \| good	3.465 \| good	0.242 \| good
2025-09-14T19:00:00.000Z	38 \| good	6.79 \| good	21.854 \| good	41.072 \| good	0.493 \| good	3.151 \| good	0.223 \| good
2025-09-14T20:00:00.000Z	38 \| good	6.561 \| good	12.41 \| good	40.627 \| good	0.487 \| good	3.104 \| good	0.242 \| good
2025-09-14T21:00:00.000Z	38 \| good	6.507 \| good	18.799 \| good	41.422 \| good	0.486 \| good	3.007 \| good	0.223 \| good
2025-09-14T22:00:00.000Z	39 \| good	6.483 \| good	23.342 \| good	41.917 \| good	0.466 \| good	1.943 \| good	0.223 \| good
2025-09-14T23:00:00.000Z	38 \| good	6.612 \| good	19.468 \| good	39.053 \| good	0.545 \| good	2.994 \| good	0.24 \| good
2025-09-15T00:00:00.000Z	38 \| good	7.44 \| good	26.954 \| good	35.802 \| good	0.455 \| good	4.969 \| good	0.304 \| good
2025-09-15T01:00:00.000Z	38 \| good	6.913 \| good	27.823 \| good	34.909 \| good	0.452 \| good	2.852 \| good	0.366 \| good
2025-09-15T02:00:00.000Z	38 \| good	7.117 \| good	28.046 \| good	33.573 \| good	0.497 \| good	3.106 \| good	0.453 \| good
2025-09-15T03:00:00.000Z	38 \| good	7.115 \| good	27.979 \| good	33.486 \| good	0.502 \| good	4.11 \| good	0.547 \| good
2025-09-15T04:00:00.000Z	38 \| good	7.298 \| good	27.414 \| good	28.267 \| good	0.464 \| good	4.159 \| good	0.611 \| good
2025-09-15T05:00:00.000Z	44 \| good	8.113 \| good	27.141 \| good	24.89 \| good	0.398 \| good	4.709 \| good	0.55 \| good
2025-09-15T06:00:00.000Z	44 \| good	7.989 \| good	27.304 \| good	19.096 \| good	0.468 \| good	4.644 \| good	0.482 \| good
2025-09-15T06:00:00.000Z	44 \| good	8.113 \| good	27.141 \| good	24.89 \| good	0.398 \| good	4.709 \| good	0.55 \| good
2025-09-11T15:00:00.000Z	30 \| good	2.638 \| good	10.418 \| good	31.663 \| good	0.236 \| good	0.756 \| good	0.147 \| good
2025-09-11T16:00:00.000Z	31 \| good	3.572 \| good	15.98 \| good	33.318 \| good	0.257 \| good	0.716 \| good	0.149 \| good
2025-09-11T17:00:00.000Z	32 \| good	3.599 \| good	16.014 \| good	34.953 \| good	0.279 \| good	0.676 \| good	0.152 \| good
2025-09-11T18:00:00.000Z	32 \| good	4.318 \| good	18.998 \| good	35.156 \| good	0.301 \| good	0.637 \| good	0.155 \| good
2025-09-11T19:00:00.000Z	31 \| good	5.144 \| good	22.12 \| good	34.225 \| good	0.311 \| good	0.808 \| good	0.157 \| good
2025-09-11T20:00:00.000Z	32 \| good	5.23 \| good	23 \| good	34.949 \| good	0.322 \| good	0.979 \| good	0.159 \| good
2025-09-11T21:00:00.000Z	31 \| good	3.904 \| good	16.969 \| good	33.579 \| good	0.333 \| good	1.15 \| good	0.161 \| good
2025-09-11T22:00:00.000Z	30 \| good	2.544 \| good	10 \| good	31.913 \| good	0.383 \| good	1.874 \| good	0.167 \| good
2025-09-11T23:00:00.000Z	27 \| good	2.625 \| good	10.848 \| good	29.349 \| good	0.433 \| good	2.599 \| good	0.172 \| good
2025-09-12T00:00:00.000Z	24 \| good	3.559 \| good	15.913 \| good	25.949 \| good	0.483 \| good	3.323 \| good	0.177 \| good
2025-09-12T01:00:00.000Z	27 \| good	4.65 \| good	19.969 \| good	26.731 \| good	0.548 \| good	3.774 \| good	0.183 \| good
2025-09-12T02:00:00.000Z	27 \| good	5.479 \| good	23.498 \| good	25.158 \| good	0.614 \| good	4.224 \| good	0.188 \| good
2025-09-12T03:00:00.000Z	33 \| good	5.837 \| good	25.15 \| good	29.107 \| good	0.679 \| good	4.675 \| good	0.194 \| good
2025-09-12T04:00:00.000Z	33 \| good	6.064 \| good	27.049 \| good	28.65 \| good	0.668 \| good	4.724 \| good	0.197 \| good
2025-09-12T05:00:00.000Z	38 \| good	6.946 \| good	30.596 \| good	28.807 \| good	0.658 \| good	4.773 \| good	0.201 \| good
2025-09-12T06:00:00.000Z	49 \| good	8.776 \| good	38.747 \| good	27.382 \| good	0.647 \| good	4.822 \| good	0.204 \| good
2025-09-12T07:00:00.000Z	52 \| moderate	10.033 \| good	44.778 \| good	30.008 \| good	0.48 \| good	3.406 \| good	0.191 \| good
2025-09-12T08:00:00.000Z	52 \| moderate	9.691 \| good	42.947 \| good	27.793 \| good	0.314 \| good	1.991 \| good	0.177 \| good
2025-09-12T09:00:00.000Z	27 \| good	4.734 \| good	20.488 \| good	22.334 \| good	0.147 \| good	0.575 \| good	0.164 \| good
2025-09-12T10:00:00.000Z	20 \| good	3.162 \| good	13.759 \| good	22.185 \| good	0.112 \| good	0.512 \| good	0.157 \| good
2025-09-12T11:00:00.000Z	19 \| good	2.1 \| good	8.557 \| good	20.536 \| good	0.076 \| good	0.449 \| good	0.151 \| good
2025-09-12T12:00:00.000Z	19 \| good	2.787 \| good	11.405 \| good	20.478 \| good	0.041 \| good	0.387 \| good	0.144 \| good
2025-09-12T13:00:00.000Z	19 \| good	2.918 \| good	12.213 \| good	21.356 \| good	0.043 \| good	0.34 \| good	0.141 \| good
2025-09-12T14:00:00.000Z	20 \| good	2.777 \| good	11.339 \| good	22.333 \| good	0.044 \| good	0.292 \| good	0.137 \| good
2025-09-12T15:00:00.000Z	20 \| good	2.361 \| good	9.88 \| good	22.376 \| good	0.046 \| good	0.245 \| good	0.134 \| good
2025-09-12T16:00:00.000Z	21 \| good	2.285 \| good	9.557 \| good	22.956 \| good	0.053 \| good	0.242 \| good	0.133 \| good
2025-09-12T17:00:00.000Z	22 \| good	1.612 \| good	6.58 \| good	23.503 \| good	0.059 \| good	0.239 \| good	0.133 \| good
2025-09-12T18:00:00.000Z	22 \| good	1.239 \| good	5 \| good	23.856 \| good	0.066 \| good	0.235 \| good	0.132 \| good
2025-09-12T19:00:00.000Z	22 \| good	0.949 \| good	3.88 \| good	23.7 \| good	0.062 \| good	0.275 \| good	0.132 \| good
2025-09-12T20:00:00.000Z	21 \| good	0.876 \| good	3.122 \| good	23.372 \| good	0.059 \| good	0.315 \| good	0.131 \| good
2025-09-12T21:00:00.000Z	21 \| good	0.241 \| good	0.79 \| good	22.7 \| good	0.056 \| good	0.354 \| good	0.131 \| good
2025-09-12T22:00:00.000Z	20 \| good	0.912 \| good	3.709 \| good	22.095 \| good	0.054 \| good	0.426 \| good	0.13 \| good
2025-09-12T23:00:00.000Z	19 \| good	0.926 \| good	3.709 \| good	19.854 \| good	0.053 \| good	0.497 \| good	0.13 \| good
2025-09-13T00:00:00.000Z	21 \| good	0.883 \| good	3.505 \| good	22.771 \| good	0.051 \| good	0.568 \| good	0.129 \| good
2025-09-13T01:00:00.000Z	19 \| good	0.869 \| good	3 \| good	20.661 \| good	0.057 \| good	0.574 \| good	0.128 \| good
2025-09-13T02:00:00.000Z	18 \| good	0.883 \| good	3 \| good	19.308 \| good	0.063 \| good	0.58 \| good	0.128 \| good
2025-09-13T03:00:00.000Z	18 \| good	0.303 \| good	1 \| good	19.202 \| good	0.069 \| good	0.585 \| good	0.127 \| good
2025-09-13T04:00:00.000Z	17 \| good	1.086 \| good	4.531 \| good	17.979 \| good	0.079 \| good	0.602 \| good	0.127 \| good
2025-09-13T05:00:00.000Z	18 \| good	1.169 \| good	4.88 \| good	18.841 \| good	0.089 \| good	0.619 \| good	0.128 \| good
2025-09-13T06:00:00.000Z	17 \| good	1.132 \| good	4.612 \| good	17.983 \| good	0.099 \| good	0.636 \| good	0.128 \| good
2025-09-13T07:00:00.000Z	16 \| good	1.016 \| good	4.035 \| good	17.088 \| good	0.108 \| good	0.667 \| good	0.129 \| good
2025-09-13T08:00:00.000Z	15 \| good	0.952 \| good	3.913 \| good	16.054 \| good	0.116 \| good	0.699 \| good	0.13 \| good
2025-09-13T09:00:00.000Z	14 \| good	0.801 \| good	2.977 \| good	15.398 \| good	0.125 \| good	0.731 \| good	0.131 \| good
2025-09-13T10:00:00.000Z	14 \| good	0.664 \| good	2.129 \| good	15.053 \| good	0.138 \| good	0.78 \| good	0.133 \| good
2025-09-13T11:00:00.000Z	13 \| good	0.655 \| good	2.066 \| good	13.601 \| good	0.151 \| good	0.828 \| good	0.134 \| good
2025-09-13T12:00:00.000Z	17 \| good	0.811 \| good	3.064 \| good	17.789 \| good	0.165 \| good	0.877 \| good	0.136 \| good
2025-09-13T13:00:00.000Z	20 \| good	1.133 \| good	5 \| good	22.422 \| good	0.169 \| good	0.716 \| good	0.134 \| good
2025-09-13T14:00:00.000Z	23 \| good	1.005 \| good	3.805 \| good	25.265 \| good	0.174 \| good	0.556 \| good	0.133 \| good

Real-time air quality index in Harwich, Massachusetts today

Common air pollutants in Harwich, Massachusetts

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Harwich, Massachusetts air quality forecast and history

Empower business decisions with accurate air quality data

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

Air quality in nearby cities

Brewster, Massachusetts

Yarmouth, Massachusetts

Dennis, Massachusetts

Barnstable Town, Massachusetts

Mashpee, Massachusetts

Sandwich, Massachusetts

How accurate is Massachusetts, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Harwich, Massachusetts updated?

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

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

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

Which pollutant is found most often in Harwich, Massachusetts?

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

What are the current PM2.5 levels in Harwich, Massachusetts?

What are the current PM10 levels at Harwich, Massachusetts?

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

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

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

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

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

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

What are the current PM₁₀ levels at Harwich, Massachusetts?

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

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

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