What are the current PM10 levels at Harwich, Massachusetts?

The current PM10 levels in Harwich, Massachusetts are 30.583 μg/m3.

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

The current sulfur dioxide (SO2) levels in Harwich, Massachusetts are 0.4 ppb.

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

The current ozone (O3) levels at Harwich, Massachusetts is 28.837 ppm.

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

The current nitrogen dioxide (NO2) levels at Harwich, Massachusetts is 11.991 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)

Moderate

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)

15.96 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

60.06 μg/m³

155

255

425

605+

Ozone (O₃)

32.41 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.82 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.32 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

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
2025-07-29T15:00:00.000Z	60 \| moderate	14.18 \| fine	48.052 \| good	33.247 \| good	0.436 \| good	6.301 \| good	0.319 \| good
2025-07-29T16:00:00.000Z	64 \| moderate	15.788 \| fine	49.81 \| good	38.035 \| good	0.415 \| good	5.423 \| good	0.276 \| good
2025-07-29T17:00:00.000Z	64 \| moderate	15.709 \| fine	63.998 \| fine	43.887 \| good	0.412 \| good	5.291 \| good	0.276 \| good
2025-07-29T18:00:00.000Z	62 \| moderate	15.417 \| fine	46.543 \| good	50.968 \| good	0.437 \| good	3.822 \| good	0.262 \| good
2025-07-29T19:00:00.000Z	58 \| moderate	13.346 \| fine	34.57 \| good	52.74 \| good	0.485 \| good	3.865 \| good	0.275 \| good
2025-07-29T20:00:00.000Z	61 \| moderate	14.381 \| fine	26.764 \| good	58.243 \| fine	0.588 \| good	3.511 \| good	0.319 \| good
2025-07-29T21:00:00.000Z	67 \| moderate	14.03 \| fine	51.524 \| good	60.428 \| fine	0.566 \| good	3.13 \| good	0.296 \| good
2025-07-29T22:00:00.000Z	74 \| moderate	13.469 \| fine	44.396 \| good	61.674 \| fine	0.566 \| good	4.439 \| good	0.281 \| good
2025-07-29T23:00:00.000Z	77 \| moderate	8.387 \| good	22.461 \| good	63.428 \| fine	0.517 \| good	3.543 \| good	0.281 \| good
2025-07-30T00:00:00.000Z	84 \| moderate	10.242 \| good	43.973 \| good	65.053 \| fine	0.494 \| good	4.932 \| good	0.32 \| good
2025-07-30T01:00:00.000Z	64 \| moderate	8.854 \| good	44.128 \| good	58.802 \| fine	0.454 \| good	6.047 \| good	0.258 \| good
2025-07-30T02:00:00.000Z	54 \| moderate	10.158 \| good	24.687 \| good	55.675 \| fine	0.357 \| good	6.593 \| good	0.298 \| good
2025-07-30T03:00:00.000Z	77 \| moderate	22.757 \| fine	99.662 \| fine	49.621 \| good	0.729 \| good	1.97 \| good	0.23 \| good
2025-07-30T04:00:00.000Z	52 \| moderate	9.936 \| good	37.472 \| good	55.194 \| fine	0.393 \| good	8.719 \| good	0.339 \| good
2025-07-30T05:00:00.000Z	54 \| moderate	10.751 \| good	45.558 \| good	47.469 \| good	0.473 \| good	6.625 \| good	0.348 \| good
2025-07-30T06:00:00.000Z	49 \| good	8.673 \| good	44.85 \| good	38.24 \| good	0.392 \| good	11.584 \| good	0.283 \| good
2025-07-30T07:00:00.000Z	54 \| moderate	10.865 \| good	44.85 \| good	36.783 \| good	0.481 \| good	6.676 \| good	0.317 \| good
2025-07-30T08:00:00.000Z	54 \| moderate	10.709 \| good	44.903 \| good	36.566 \| good	0.541 \| good	8.307 \| good	0.302 \| good
2025-07-30T09:00:00.000Z	49 \| good	8.875 \| good	35.656 \| good	31.529 \| good	0.496 \| good	8.328 \| good	0.269 \| good
2025-07-30T10:00:00.000Z	52 \| moderate	10.316 \| good	35.284 \| good	32.284 \| good	0.415 \| good	11.222 \| good	0.308 \| good
2025-07-30T11:00:00.000Z	49 \| good	9.131 \| good	26.454 \| good	33.221 \| good	0.451 \| good	6.943 \| good	0.328 \| good
2025-07-30T12:00:00.000Z	49 \| good	9.17 \| good	30.467 \| good	28.116 \| good	0.487 \| good	11.675 \| good	0.352 \| good
2025-07-30T13:00:00.000Z	52 \| moderate	9.88 \| good	41.056 \| good	26.926 \| good	0.455 \| good	10.049 \| good	0.295 \| good
2025-07-30T14:00:00.000Z	52 \| moderate	10.434 \| good	41.773 \| good	35.137 \| good	0.498 \| good	5.93 \| good	0.272 \| good
2025-07-30T15:00:00.000Z	52 \| moderate	10.184 \| good	26.201 \| good	34.081 \| good	0.412 \| good	5.203 \| good	0.27 \| good
2025-07-30T16:00:00.000Z	52 \| moderate	10.198 \| good	35.731 \| good	36.02 \| good	0.397 \| good	6.923 \| good	0.247 \| good
2025-07-30T17:00:00.000Z	54 \| moderate	11.067 \| good	41.2 \| good	40.826 \| good	0.523 \| good	8.83 \| good	0.271 \| good
2025-07-30T18:00:00.000Z	52 \| moderate	9.687 \| good	41.618 \| good	51.306 \| good	0.493 \| good	5.445 \| good	0.246 \| good
2025-07-30T19:00:00.000Z	52 \| moderate	10.057 \| good	51.518 \| good	54.06 \| good	0.514 \| good	5.464 \| good	0.291 \| good
2025-07-30T20:00:00.000Z	54 \| moderate	10.677 \| good	29.135 \| good	54.169 \| good	0.426 \| good	5.21 \| good	0.291 \| good
2025-07-30T21:00:00.000Z	52 \| moderate	9.955 \| good	28.654 \| good	50.797 \| good	0.486 \| good	5.892 \| good	0.318 \| good
2025-07-30T22:00:00.000Z	52 \| moderate	9.781 \| good	25.05 \| good	41.888 \| good	0.443 \| good	4.272 \| good	0.321 \| good
2025-07-30T23:00:00.000Z	52 \| moderate	9.593 \| good	37.05 \| good	53.93 \| good	0.566 \| good	5.07 \| good	0.315 \| good
2025-07-31T00:00:00.000Z	67 \| moderate	10.007 \| good	87.772 \| fine	53.616 \| good	0.441 \| good	4.152 \| good	0.315 \| good
2025-07-31T01:00:00.000Z	59 \| moderate	9.762 \| good	72.323 \| fine	53.004 \| good	0.458 \| good	6.378 \| good	0.36 \| good
2025-07-31T02:00:00.000Z	52 \| moderate	10.136 \| good	27.341 \| good	52.699 \| good	0.48 \| good	6.932 \| good	0.318 \| good
2025-07-31T03:00:00.000Z	49 \| good	8.969 \| good	33.462 \| good	50.962 \| good	0.439 \| good	7.68 \| good	0.296 \| good
2025-07-31T04:00:00.000Z	56 \| moderate	12.235 \| fine	38.472 \| good	51.295 \| good	0.447 \| good	7.423 \| good	0.296 \| good
2025-07-31T05:00:00.000Z	54 \| moderate	11.381 \| good	44.939 \| good	49.973 \| good	0.467 \| good	7.868 \| good	0.307 \| good
2025-07-31T06:00:00.000Z	54 \| moderate	11.367 \| good	60.107 \| fine	49.543 \| good	0.89 \| good	8.113 \| good	0.317 \| good
2025-07-31T07:00:00.000Z	58 \| moderate	12.984 \| fine	39.671 \| good	53.847 \| good	0.371 \| good	9.497 \| good	0.234 \| good
2025-07-31T08:00:00.000Z	52 \| moderate	9.729 \| good	23.472 \| good	43.382 \| good	0.448 \| good	10.837 \| good	0.234 \| good
2025-07-31T09:00:00.000Z	60 \| moderate	13.576 \| fine	36.111 \| good	38.053 \| good	0.645 \| good	8.108 \| good	0.231 \| good
2025-07-31T10:00:00.000Z	54 \| moderate	11.17 \| good	34.306 \| good	46.06 \| good	0.395 \| good	7.095 \| good	0.27 \| good
2025-07-31T11:00:00.000Z	56 \| moderate	12.248 \| fine	37.353 \| good	37.744 \| good	0.379 \| good	8.351 \| good	0.316 \| good
2025-07-31T12:00:00.000Z	54 \| moderate	11.118 \| good	50.187 \| good	31.06 \| good	0.395 \| good	7.59 \| good	0.292 \| good
2025-07-31T13:00:00.000Z	58 \| moderate	13.209 \| fine	47.607 \| good	26.653 \| good	0.376 \| good	6.481 \| good	0.315 \| good
2025-07-31T14:00:00.000Z	64 \| moderate	15.965 \| fine	60.065 \| fine	32.405 \| good	0.357 \| good	5.821 \| good	0.315 \| good
2025-07-31T14:00:00.000Z	64 \| moderate	15.965 \| fine	60.065 \| fine	32.405 \| good	0.357 \| good	5.821 \| good	0.315 \| good
2025-07-29T15:00:00.000Z	75 \| moderate	21.824 \| fine	95.209 \| fine	52.385 \| good	0.307 \| good	2.029 \| good	0.221 \| good
2025-07-29T16:00:00.000Z	81 \| moderate	25.137 \| fine	109.784 \| fine	59.913 \| fine	0.319 \| good	1.764 \| good	0.218 \| good
2025-07-29T17:00:00.000Z	84 \| moderate	27.041 \| fine	117.355 \| fine	59.955 \| fine	0.331 \| good	1.498 \| good	0.214 \| good
2025-07-29T18:00:00.000Z	84 \| moderate	26.987 \| fine	116.784 \| fine	59.543 \| fine	0.343 \| good	1.233 \| good	0.21 \| good
2025-07-29T19:00:00.000Z	82 \| moderate	25.536 \| fine	111.517 \| fine	56.942 \| fine	0.386 \| good	1.357 \| good	0.211 \| good
2025-07-29T20:00:00.000Z	79 \| moderate	23.611 \| fine	103.452 \| fine	58.939 \| fine	0.428 \| good	1.48 \| good	0.213 \| good
2025-07-29T21:00:00.000Z	77 \| moderate	21.746 \| fine	95.421 \| fine	62.582 \| fine	0.471 \| good	1.604 \| good	0.214 \| good
2025-07-29T22:00:00.000Z	73 \| moderate	20.509 \| fine	89.951 \| fine	59.255 \| fine	0.515 \| good	1.924 \| good	0.218 \| good
2025-07-29T23:00:00.000Z	69 \| moderate	19.01 \| fine	83.706 \| fine	55.2 \| fine	0.559 \| good	2.245 \| good	0.222 \| good
2025-07-30T00:00:00.000Z	71 \| moderate	19.977 \| fine	87.675 \| fine	58.763 \| fine	0.602 \| good	2.566 \| good	0.225 \| good
2025-07-30T01:00:00.000Z	73 \| moderate	21.146 \| fine	92.976 \| fine	55.85 \| fine	0.681 \| good	2.391 \| good	0.227 \| good
2025-07-30T02:00:00.000Z	75 \| moderate	22.125 \| fine	97.15 \| fine	52.525 \| good	0.759 \| good	2.216 \| good	0.23 \| good
2025-07-30T03:00:00.000Z	77 \| moderate	22.781 \| fine	99.567 \| fine	45.948 \| good	0.838 \| good	2.042 \| good	0.232 \| good
2025-07-30T04:00:00.000Z	77 \| moderate	23.46 \| fine	102.763 \| fine	43.233 \| good	0.829 \| good	2.272 \| good	0.234 \| good
2025-07-30T05:00:00.000Z	79 \| moderate	24.221 \| fine	105.947 \| fine	46.491 \| good	0.821 \| good	2.502 \| good	0.237 \| good
2025-07-30T06:00:00.000Z	77 \| moderate	22.89 \| fine	100.507 \| fine	45.619 \| good	0.813 \| good	2.733 \| good	0.24 \| good
2025-07-30T07:00:00.000Z	73 \| moderate	21.25 \| fine	93.268 \| fine	36.4 \| good	0.759 \| good	2.532 \| good	0.232 \| good
2025-07-30T08:00:00.000Z	69 \| moderate	19.219 \| fine	85.147 \| fine	28.425 \| good	0.705 \| good	2.332 \| good	0.224 \| good
2025-07-30T09:00:00.000Z	75 \| moderate	21.999 \| fine	96.542 \| fine	26.238 \| good	0.65 \| good	2.131 \| good	0.216 \| good
2025-07-30T10:00:00.000Z	71 \| moderate	19.743 \| fine	87.031 \| fine	20.227 \| good	0.568 \| good	2.134 \| good	0.215 \| good
2025-07-30T11:00:00.000Z	69 \| moderate	19.294 \| fine	85.143 \| fine	23.995 \| good	0.486 \| good	2.136 \| good	0.213 \| good
2025-07-30T12:00:00.000Z	69 \| moderate	18.974 \| fine	83.69 \| fine	29.606 \| good	0.404 \| good	2.139 \| good	0.212 \| good
2025-07-30T13:00:00.000Z	69 \| moderate	19.03 \| fine	83.835 \| fine	34.528 \| good	0.467 \| good	2.542 \| good	0.227 \| good
2025-07-30T14:00:00.000Z	71 \| moderate	19.557 \| fine	86.191 \| fine	36.889 \| good	0.531 \| good	2.945 \| good	0.242 \| good
2025-07-30T15:00:00.000Z	71 \| moderate	19.796 \| fine	87.424 \| fine	38.868 \| good	0.594 \| good	3.348 \| good	0.257 \| good
2025-07-30T16:00:00.000Z	71 \| moderate	20.064 \| fine	88.054 \| fine	42.51 \| good	0.573 \| good	2.715 \| good	0.251 \| good
2025-07-30T17:00:00.000Z	75 \| moderate	21.99 \| fine	96.899 \| fine	50.523 \| good	0.553 \| good	2.083 \| good	0.245 \| good
2025-07-30T18:00:00.000Z	77 \| moderate	23.441 \| fine	102.926 \| fine	57.803 \| fine	0.532 \| good	1.451 \| good	0.24 \| good
2025-07-30T19:00:00.000Z	75 \| moderate	22.457 \| fine	98.162 \| fine	60.965 \| fine	0.497 \| good	1.55 \| good	0.24 \| good
2025-07-30T20:00:00.000Z	74 \| moderate	20.93 \| fine	91.951 \| fine	61.766 \| fine	0.461 \| good	1.65 \| good	0.24 \| good
2025-07-30T21:00:00.000Z	71 \| moderate	20.217 \| fine	89 \| fine	61.231 \| fine	0.425 \| good	1.75 \| good	0.24 \| good
2025-07-30T22:00:00.000Z	71 \| moderate	19.981 \| fine	88.339 \| fine	58.737 \| fine	0.495 \| good	2.154 \| good	0.235 \| good
2025-07-30T23:00:00.000Z	69 \| moderate	18.574 \| fine	81.8 \| fine	52.286 \| good	0.564 \| good	2.558 \| good	0.231 \| good
2025-07-31T00:00:00.000Z	66 \| moderate	16.611 \| fine	73.671 \| fine	55.063 \| fine	0.634 \| good	2.962 \| good	0.227 \| good
2025-07-31T01:00:00.000Z	64 \| moderate	15.682 \| fine	69.695 \| fine	56.646 \| fine	0.704 \| good	2.684 \| good	0.22 \| good
2025-07-31T02:00:00.000Z	60 \| moderate	13.893 \| fine	62.894 \| fine	56.758 \| fine	0.774 \| good	2.407 \| good	0.213 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	14.357 \| fine	64.468 \| fine	59.097 \| fine	0.844 \| good	2.129 \| good	0.206 \| good
2025-07-31T04:00:00.000Z	64 \| moderate	15.887 \| fine	70.824 \| fine	57.386 \| fine	0.793 \| good	2.124 \| good	0.201 \| good
2025-07-31T05:00:00.000Z	64 \| moderate	16.445 \| fine	73 \| fine	54.455 \| good	0.743 \| good	2.12 \| good	0.196 \| good
2025-07-31T06:00:00.000Z	62 \| moderate	15.248 \| fine	67.951 \| fine	52.461 \| good	0.692 \| good	2.115 \| good	0.192 \| good
2025-07-31T07:00:00.000Z	62 \| moderate	15.128 \| fine	67.667 \| fine	49.501 \| good	0.68 \| good	2.206 \| good	0.19 \| good
2025-07-31T08:00:00.000Z	64 \| moderate	16.179 \| fine	71.837 \| fine	42.427 \| good	0.667 \| good	2.297 \| good	0.189 \| good
2025-07-31T09:00:00.000Z	69 \| moderate	19.175 \| fine	85.041 \| fine	38.163 \| good	0.655 \| good	2.389 \| good	0.187 \| good
2025-07-31T10:00:00.000Z	75 \| moderate	22.005 \| fine	96.976 \| fine	39.883 \| good	0.614 \| good	2.775 \| good	0.195 \| good
2025-07-31T11:00:00.000Z	79 \| moderate	23.639 \| fine	103.105 \| fine	37.509 \| good	0.572 \| good	3.161 \| good	0.203 \| good
2025-07-31T12:00:00.000Z	79 \| moderate	23.567 \| fine	102.826 \| fine	36.689 \| good	0.531 \| good	3.547 \| good	0.211 \| good
2025-07-31T13:00:00.000Z	73 \| moderate	21.32 \| fine	94.294 \| fine	36.247 \| good	0.469 \| good	2.836 \| good	0.213 \| good
2025-07-31T14:00:00.000Z	67 \| moderate	18.009 \| fine	79.268 \| fine	37.061 \| good	0.408 \| good	2.124 \| good	0.216 \| 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 02:00:00 on 2025-07-28.

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

The best air quality in Harwich, Massachusetts was recorded at 12:00:00 on 2025-07-29.

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

The real-time air quality index in Harwich, Massachusetts is 54, currently categorized as Moderate.

Which pollutant is found most often in Harwich, Massachusetts?

The most common pollutant in Harwich, Massachusetts is PM2.5.

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 11.179 μg/m³.

What are the current PM₁₀ levels at Harwich, Massachusetts?

The current PM₁₀ levels in Harwich, Massachusetts are 30.583 μg/m³.

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

The current carbon monoxide (CO) level in Harwich, Massachusetts is 0.371 ppm.

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

The current sulfur dioxide (SO₂) levels in Harwich, Massachusetts are 0.4 ppb.

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

The current ozone (O₃) levels at Harwich, Massachusetts is 28.837 ppm.

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

The current nitrogen dioxide (NO₂) levels at Harwich, Massachusetts is 11.991 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-29T15:00:00.000Z	60 \| moderate	14.18 \| fine	48.052 \| good	33.247 \| good	0.436 \| good	6.301 \| good	0.319 \| good
2025-07-29T16:00:00.000Z	64 \| moderate	15.788 \| fine	49.81 \| good	38.035 \| good	0.415 \| good	5.423 \| good	0.276 \| good
2025-07-29T17:00:00.000Z	64 \| moderate	15.709 \| fine	63.998 \| fine	43.887 \| good	0.412 \| good	5.291 \| good	0.276 \| good
2025-07-29T18:00:00.000Z	62 \| moderate	15.417 \| fine	46.543 \| good	50.968 \| good	0.437 \| good	3.822 \| good	0.262 \| good
2025-07-29T19:00:00.000Z	58 \| moderate	13.346 \| fine	34.57 \| good	52.74 \| good	0.485 \| good	3.865 \| good	0.275 \| good
2025-07-29T20:00:00.000Z	61 \| moderate	14.381 \| fine	26.764 \| good	58.243 \| fine	0.588 \| good	3.511 \| good	0.319 \| good
2025-07-29T21:00:00.000Z	67 \| moderate	14.03 \| fine	51.524 \| good	60.428 \| fine	0.566 \| good	3.13 \| good	0.296 \| good
2025-07-29T22:00:00.000Z	74 \| moderate	13.469 \| fine	44.396 \| good	61.674 \| fine	0.566 \| good	4.439 \| good	0.281 \| good
2025-07-29T23:00:00.000Z	77 \| moderate	8.387 \| good	22.461 \| good	63.428 \| fine	0.517 \| good	3.543 \| good	0.281 \| good
2025-07-30T00:00:00.000Z	84 \| moderate	10.242 \| good	43.973 \| good	65.053 \| fine	0.494 \| good	4.932 \| good	0.32 \| good
2025-07-30T01:00:00.000Z	64 \| moderate	8.854 \| good	44.128 \| good	58.802 \| fine	0.454 \| good	6.047 \| good	0.258 \| good
2025-07-30T02:00:00.000Z	54 \| moderate	10.158 \| good	24.687 \| good	55.675 \| fine	0.357 \| good	6.593 \| good	0.298 \| good
2025-07-30T03:00:00.000Z	77 \| moderate	22.757 \| fine	99.662 \| fine	49.621 \| good	0.729 \| good	1.97 \| good	0.23 \| good
2025-07-30T04:00:00.000Z	52 \| moderate	9.936 \| good	37.472 \| good	55.194 \| fine	0.393 \| good	8.719 \| good	0.339 \| good
2025-07-30T05:00:00.000Z	54 \| moderate	10.751 \| good	45.558 \| good	47.469 \| good	0.473 \| good	6.625 \| good	0.348 \| good
2025-07-30T06:00:00.000Z	49 \| good	8.673 \| good	44.85 \| good	38.24 \| good	0.392 \| good	11.584 \| good	0.283 \| good
2025-07-30T07:00:00.000Z	54 \| moderate	10.865 \| good	44.85 \| good	36.783 \| good	0.481 \| good	6.676 \| good	0.317 \| good
2025-07-30T08:00:00.000Z	54 \| moderate	10.709 \| good	44.903 \| good	36.566 \| good	0.541 \| good	8.307 \| good	0.302 \| good
2025-07-30T09:00:00.000Z	49 \| good	8.875 \| good	35.656 \| good	31.529 \| good	0.496 \| good	8.328 \| good	0.269 \| good
2025-07-30T10:00:00.000Z	52 \| moderate	10.316 \| good	35.284 \| good	32.284 \| good	0.415 \| good	11.222 \| good	0.308 \| good
2025-07-30T11:00:00.000Z	49 \| good	9.131 \| good	26.454 \| good	33.221 \| good	0.451 \| good	6.943 \| good	0.328 \| good
2025-07-30T12:00:00.000Z	49 \| good	9.17 \| good	30.467 \| good	28.116 \| good	0.487 \| good	11.675 \| good	0.352 \| good
2025-07-30T13:00:00.000Z	52 \| moderate	9.88 \| good	41.056 \| good	26.926 \| good	0.455 \| good	10.049 \| good	0.295 \| good
2025-07-30T14:00:00.000Z	52 \| moderate	10.434 \| good	41.773 \| good	35.137 \| good	0.498 \| good	5.93 \| good	0.272 \| good
2025-07-30T15:00:00.000Z	52 \| moderate	10.184 \| good	26.201 \| good	34.081 \| good	0.412 \| good	5.203 \| good	0.27 \| good
2025-07-30T16:00:00.000Z	52 \| moderate	10.198 \| good	35.731 \| good	36.02 \| good	0.397 \| good	6.923 \| good	0.247 \| good
2025-07-30T17:00:00.000Z	54 \| moderate	11.067 \| good	41.2 \| good	40.826 \| good	0.523 \| good	8.83 \| good	0.271 \| good
2025-07-30T18:00:00.000Z	52 \| moderate	9.687 \| good	41.618 \| good	51.306 \| good	0.493 \| good	5.445 \| good	0.246 \| good
2025-07-30T19:00:00.000Z	52 \| moderate	10.057 \| good	51.518 \| good	54.06 \| good	0.514 \| good	5.464 \| good	0.291 \| good
2025-07-30T20:00:00.000Z	54 \| moderate	10.677 \| good	29.135 \| good	54.169 \| good	0.426 \| good	5.21 \| good	0.291 \| good
2025-07-30T21:00:00.000Z	52 \| moderate	9.955 \| good	28.654 \| good	50.797 \| good	0.486 \| good	5.892 \| good	0.318 \| good
2025-07-30T22:00:00.000Z	52 \| moderate	9.781 \| good	25.05 \| good	41.888 \| good	0.443 \| good	4.272 \| good	0.321 \| good
2025-07-30T23:00:00.000Z	52 \| moderate	9.593 \| good	37.05 \| good	53.93 \| good	0.566 \| good	5.07 \| good	0.315 \| good
2025-07-31T00:00:00.000Z	67 \| moderate	10.007 \| good	87.772 \| fine	53.616 \| good	0.441 \| good	4.152 \| good	0.315 \| good
2025-07-31T01:00:00.000Z	59 \| moderate	9.762 \| good	72.323 \| fine	53.004 \| good	0.458 \| good	6.378 \| good	0.36 \| good
2025-07-31T02:00:00.000Z	52 \| moderate	10.136 \| good	27.341 \| good	52.699 \| good	0.48 \| good	6.932 \| good	0.318 \| good
2025-07-31T03:00:00.000Z	49 \| good	8.969 \| good	33.462 \| good	50.962 \| good	0.439 \| good	7.68 \| good	0.296 \| good
2025-07-31T04:00:00.000Z	56 \| moderate	12.235 \| fine	38.472 \| good	51.295 \| good	0.447 \| good	7.423 \| good	0.296 \| good
2025-07-31T05:00:00.000Z	54 \| moderate	11.381 \| good	44.939 \| good	49.973 \| good	0.467 \| good	7.868 \| good	0.307 \| good
2025-07-31T06:00:00.000Z	54 \| moderate	11.367 \| good	60.107 \| fine	49.543 \| good	0.89 \| good	8.113 \| good	0.317 \| good
2025-07-31T07:00:00.000Z	58 \| moderate	12.984 \| fine	39.671 \| good	53.847 \| good	0.371 \| good	9.497 \| good	0.234 \| good
2025-07-31T08:00:00.000Z	52 \| moderate	9.729 \| good	23.472 \| good	43.382 \| good	0.448 \| good	10.837 \| good	0.234 \| good
2025-07-31T09:00:00.000Z	60 \| moderate	13.576 \| fine	36.111 \| good	38.053 \| good	0.645 \| good	8.108 \| good	0.231 \| good
2025-07-31T10:00:00.000Z	54 \| moderate	11.17 \| good	34.306 \| good	46.06 \| good	0.395 \| good	7.095 \| good	0.27 \| good
2025-07-31T11:00:00.000Z	56 \| moderate	12.248 \| fine	37.353 \| good	37.744 \| good	0.379 \| good	8.351 \| good	0.316 \| good
2025-07-31T12:00:00.000Z	54 \| moderate	11.118 \| good	50.187 \| good	31.06 \| good	0.395 \| good	7.59 \| good	0.292 \| good
2025-07-31T13:00:00.000Z	58 \| moderate	13.209 \| fine	47.607 \| good	26.653 \| good	0.376 \| good	6.481 \| good	0.315 \| good
2025-07-31T14:00:00.000Z	64 \| moderate	15.965 \| fine	60.065 \| fine	32.405 \| good	0.357 \| good	5.821 \| good	0.315 \| good
2025-07-31T14:00:00.000Z	64 \| moderate	15.965 \| fine	60.065 \| fine	32.405 \| good	0.357 \| good	5.821 \| good	0.315 \| good
2025-07-29T15:00:00.000Z	75 \| moderate	21.824 \| fine	95.209 \| fine	52.385 \| good	0.307 \| good	2.029 \| good	0.221 \| good
2025-07-29T16:00:00.000Z	81 \| moderate	25.137 \| fine	109.784 \| fine	59.913 \| fine	0.319 \| good	1.764 \| good	0.218 \| good
2025-07-29T17:00:00.000Z	84 \| moderate	27.041 \| fine	117.355 \| fine	59.955 \| fine	0.331 \| good	1.498 \| good	0.214 \| good
2025-07-29T18:00:00.000Z	84 \| moderate	26.987 \| fine	116.784 \| fine	59.543 \| fine	0.343 \| good	1.233 \| good	0.21 \| good
2025-07-29T19:00:00.000Z	82 \| moderate	25.536 \| fine	111.517 \| fine	56.942 \| fine	0.386 \| good	1.357 \| good	0.211 \| good
2025-07-29T20:00:00.000Z	79 \| moderate	23.611 \| fine	103.452 \| fine	58.939 \| fine	0.428 \| good	1.48 \| good	0.213 \| good
2025-07-29T21:00:00.000Z	77 \| moderate	21.746 \| fine	95.421 \| fine	62.582 \| fine	0.471 \| good	1.604 \| good	0.214 \| good
2025-07-29T22:00:00.000Z	73 \| moderate	20.509 \| fine	89.951 \| fine	59.255 \| fine	0.515 \| good	1.924 \| good	0.218 \| good
2025-07-29T23:00:00.000Z	69 \| moderate	19.01 \| fine	83.706 \| fine	55.2 \| fine	0.559 \| good	2.245 \| good	0.222 \| good
2025-07-30T00:00:00.000Z	71 \| moderate	19.977 \| fine	87.675 \| fine	58.763 \| fine	0.602 \| good	2.566 \| good	0.225 \| good
2025-07-30T01:00:00.000Z	73 \| moderate	21.146 \| fine	92.976 \| fine	55.85 \| fine	0.681 \| good	2.391 \| good	0.227 \| good
2025-07-30T02:00:00.000Z	75 \| moderate	22.125 \| fine	97.15 \| fine	52.525 \| good	0.759 \| good	2.216 \| good	0.23 \| good
2025-07-30T03:00:00.000Z	77 \| moderate	22.781 \| fine	99.567 \| fine	45.948 \| good	0.838 \| good	2.042 \| good	0.232 \| good
2025-07-30T04:00:00.000Z	77 \| moderate	23.46 \| fine	102.763 \| fine	43.233 \| good	0.829 \| good	2.272 \| good	0.234 \| good
2025-07-30T05:00:00.000Z	79 \| moderate	24.221 \| fine	105.947 \| fine	46.491 \| good	0.821 \| good	2.502 \| good	0.237 \| good
2025-07-30T06:00:00.000Z	77 \| moderate	22.89 \| fine	100.507 \| fine	45.619 \| good	0.813 \| good	2.733 \| good	0.24 \| good
2025-07-30T07:00:00.000Z	73 \| moderate	21.25 \| fine	93.268 \| fine	36.4 \| good	0.759 \| good	2.532 \| good	0.232 \| good
2025-07-30T08:00:00.000Z	69 \| moderate	19.219 \| fine	85.147 \| fine	28.425 \| good	0.705 \| good	2.332 \| good	0.224 \| good
2025-07-30T09:00:00.000Z	75 \| moderate	21.999 \| fine	96.542 \| fine	26.238 \| good	0.65 \| good	2.131 \| good	0.216 \| good
2025-07-30T10:00:00.000Z	71 \| moderate	19.743 \| fine	87.031 \| fine	20.227 \| good	0.568 \| good	2.134 \| good	0.215 \| good
2025-07-30T11:00:00.000Z	69 \| moderate	19.294 \| fine	85.143 \| fine	23.995 \| good	0.486 \| good	2.136 \| good	0.213 \| good
2025-07-30T12:00:00.000Z	69 \| moderate	18.974 \| fine	83.69 \| fine	29.606 \| good	0.404 \| good	2.139 \| good	0.212 \| good
2025-07-30T13:00:00.000Z	69 \| moderate	19.03 \| fine	83.835 \| fine	34.528 \| good	0.467 \| good	2.542 \| good	0.227 \| good
2025-07-30T14:00:00.000Z	71 \| moderate	19.557 \| fine	86.191 \| fine	36.889 \| good	0.531 \| good	2.945 \| good	0.242 \| good
2025-07-30T15:00:00.000Z	71 \| moderate	19.796 \| fine	87.424 \| fine	38.868 \| good	0.594 \| good	3.348 \| good	0.257 \| good
2025-07-30T16:00:00.000Z	71 \| moderate	20.064 \| fine	88.054 \| fine	42.51 \| good	0.573 \| good	2.715 \| good	0.251 \| good
2025-07-30T17:00:00.000Z	75 \| moderate	21.99 \| fine	96.899 \| fine	50.523 \| good	0.553 \| good	2.083 \| good	0.245 \| good
2025-07-30T18:00:00.000Z	77 \| moderate	23.441 \| fine	102.926 \| fine	57.803 \| fine	0.532 \| good	1.451 \| good	0.24 \| good
2025-07-30T19:00:00.000Z	75 \| moderate	22.457 \| fine	98.162 \| fine	60.965 \| fine	0.497 \| good	1.55 \| good	0.24 \| good
2025-07-30T20:00:00.000Z	74 \| moderate	20.93 \| fine	91.951 \| fine	61.766 \| fine	0.461 \| good	1.65 \| good	0.24 \| good
2025-07-30T21:00:00.000Z	71 \| moderate	20.217 \| fine	89 \| fine	61.231 \| fine	0.425 \| good	1.75 \| good	0.24 \| good
2025-07-30T22:00:00.000Z	71 \| moderate	19.981 \| fine	88.339 \| fine	58.737 \| fine	0.495 \| good	2.154 \| good	0.235 \| good
2025-07-30T23:00:00.000Z	69 \| moderate	18.574 \| fine	81.8 \| fine	52.286 \| good	0.564 \| good	2.558 \| good	0.231 \| good
2025-07-31T00:00:00.000Z	66 \| moderate	16.611 \| fine	73.671 \| fine	55.063 \| fine	0.634 \| good	2.962 \| good	0.227 \| good
2025-07-31T01:00:00.000Z	64 \| moderate	15.682 \| fine	69.695 \| fine	56.646 \| fine	0.704 \| good	2.684 \| good	0.22 \| good
2025-07-31T02:00:00.000Z	60 \| moderate	13.893 \| fine	62.894 \| fine	56.758 \| fine	0.774 \| good	2.407 \| good	0.213 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	14.357 \| fine	64.468 \| fine	59.097 \| fine	0.844 \| good	2.129 \| good	0.206 \| good
2025-07-31T04:00:00.000Z	64 \| moderate	15.887 \| fine	70.824 \| fine	57.386 \| fine	0.793 \| good	2.124 \| good	0.201 \| good
2025-07-31T05:00:00.000Z	64 \| moderate	16.445 \| fine	73 \| fine	54.455 \| good	0.743 \| good	2.12 \| good	0.196 \| good
2025-07-31T06:00:00.000Z	62 \| moderate	15.248 \| fine	67.951 \| fine	52.461 \| good	0.692 \| good	2.115 \| good	0.192 \| good
2025-07-31T07:00:00.000Z	62 \| moderate	15.128 \| fine	67.667 \| fine	49.501 \| good	0.68 \| good	2.206 \| good	0.19 \| good
2025-07-31T08:00:00.000Z	64 \| moderate	16.179 \| fine	71.837 \| fine	42.427 \| good	0.667 \| good	2.297 \| good	0.189 \| good
2025-07-31T09:00:00.000Z	69 \| moderate	19.175 \| fine	85.041 \| fine	38.163 \| good	0.655 \| good	2.389 \| good	0.187 \| good
2025-07-31T10:00:00.000Z	75 \| moderate	22.005 \| fine	96.976 \| fine	39.883 \| good	0.614 \| good	2.775 \| good	0.195 \| good
2025-07-31T11:00:00.000Z	79 \| moderate	23.639 \| fine	103.105 \| fine	37.509 \| good	0.572 \| good	3.161 \| good	0.203 \| good
2025-07-31T12:00:00.000Z	79 \| moderate	23.567 \| fine	102.826 \| fine	36.689 \| good	0.531 \| good	3.547 \| good	0.211 \| good
2025-07-31T13:00:00.000Z	73 \| moderate	21.32 \| fine	94.294 \| fine	36.247 \| good	0.469 \| good	2.836 \| good	0.213 \| good
2025-07-31T14:00:00.000Z	67 \| moderate	18.009 \| fine	79.268 \| fine	37.061 \| good	0.408 \| good	2.124 \| good	0.216 \| 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?