What are the current PM10 levels at Westborough, Massachusetts?

The current PM10 levels in Westborough, Massachusetts are 33.682 μg/m3.

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

The current sulfur dioxide (SO2) levels in Westborough, Massachusetts are 0.441 ppb.

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

The current ozone (O3) levels at Westborough, Massachusetts is 11.471 ppm.

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

The current nitrogen dioxide (NO2) levels at Westborough, Massachusetts is 9.393 ppb.

Real-time air quality index in Westborough, Massachusetts today

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

The measured PM2.5 levels in Westborough, Massachusetts at present are 7.931 μg/m3.

Stay updated with real-time air quality in Westborough, 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

Westborough, Massachusetts

Last updated: ... (Local time)

Common air pollutants in Westborough, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.93 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

33.68 μg/m³

155

255

425

605+

Ozone (O₃)

11.47 ppb

201

201+

Sulfur Dioxide (SO₂)

0.44 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.39 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.26 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Westborough, Massachusetts

Get Live Pollen Counts

Westborough, Massachusetts

Scroll To Air Quality Map

Track live Westborough, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-16T10:00:00.000Z	62 \| moderate	14.591 \| fine	68.747 \| fine	19.426 \| good	0.299 \| good	13.962 \| good	0.288 \| good
2026-07-16T11:00:00.000Z	67 \| moderate	17.908 \| fine	41.79 \| good	19.942 \| good	0.365 \| good	10.993 \| good	0.317 \| good
2026-07-16T12:00:00.000Z	97 \| moderate	33.767 \| fine	143.928 \| fine	13.23 \| good	0.377 \| good	6.341 \| good	0.272 \| good
2026-07-16T13:00:00.000Z	147 \| sensitive	54.052 \| moderate	156.457 \| moderate	17.157 \| good	0.377 \| good	3.503 \| good	0.228 \| good
2026-07-16T14:00:00.000Z	67 \| moderate	17.867 \| fine	48.465 \| good	19.668 \| good	0.321 \| good	4.853 \| good	0.243 \| good
2026-07-16T15:00:00.000Z	88 \| moderate	29.003 \| fine	128.774 \| fine	23.54 \| good	0.461 \| good	3.689 \| good	0.243 \| good
2026-07-16T16:00:00.000Z	79 \| moderate	24.017 \| fine	111.626 \| fine	23.415 \| good	0.461 \| good	3.124 \| good	0.23 \| good
2026-07-16T17:00:00.000Z	58 \| moderate	13.01 \| fine	46.656 \| good	30.335 \| good	0.509 \| good	3.774 \| good	0.286 \| good
2026-07-16T18:00:00.000Z	92 \| moderate	31.461 \| fine	128.456 \| fine	29.742 \| good	0.521 \| good	4.555 \| good	0.243 \| good
2026-07-16T19:00:00.000Z	66 \| moderate	17.195 \| fine	53.488 \| good	30.262 \| good	0.537 \| good	3.575 \| good	0.243 \| good
2026-07-16T20:00:00.000Z	64 \| moderate	15.946 \| fine	60.915 \| fine	35.275 \| good	0.587 \| good	3.822 \| good	0.287 \| good
2026-07-16T21:00:00.000Z	153 \| unhealthy	57.945 \| poor	192.757 \| moderate	36.906 \| good	0.536 \| good	2.902 \| good	0.42 \| good
2026-07-16T22:00:00.000Z	209 \| vUnhealthy	134.032 \| poor	298.161 \| poor	36.755 \| good	0.54 \| good	3.113 \| good	0.371 \| good
2026-07-16T23:00:00.000Z	165 \| unhealthy	49.264 \| moderate	284.492 \| poor	37.446 \| good	0.51 \| good	2.368 \| good	0.431 \| good
2026-07-17T00:00:00.000Z	198 \| unhealthy	115.406 \| poor	350.376 \| poor	35.812 \| good	0.462 \| good	2.738 \| good	0.359 \| good
2026-07-17T01:00:00.000Z	189 \| unhealthy	94.411 \| poor	331.175 \| poor	36.046 \| good	0.461 \| good	2.664 \| good	0.345 \| good
2026-07-17T02:00:00.000Z	166 \| unhealthy	39.217 \| moderate	284.765 \| poor	31.537 \| good	0.477 \| good	2.362 \| good	0.357 \| good
2026-07-17T03:00:00.000Z	153 \| unhealthy	58.871 \| poor	220.153 \| moderate	23.5 \| good	0.461 \| good	5.818 \| good	0.4 \| good
2026-07-17T04:00:00.000Z	90 \| moderate	29.553 \| fine	103.417 \| fine	25.909 \| good	0.447 \| good	4.968 \| good	0.427 \| good
2026-07-17T05:00:00.000Z	92 \| moderate	30.961 \| fine	42.597 \| good	25.955 \| good	0.339 \| good	3.559 \| good	0.427 \| good
2026-07-17T06:00:00.000Z	94 \| moderate	31.602 \| fine	75.127 \| fine	23.337 \| good	0.342 \| good	3.767 \| good	0.399 \| good
2026-07-17T07:00:00.000Z	94 \| moderate	31.727 \| fine	74.044 \| fine	24.386 \| good	0.342 \| good	3.613 \| good	0.399 \| good
2026-07-17T08:00:00.000Z	82 \| moderate	25.965 \| fine	94.847 \| fine	18.522 \| good	0.353 \| good	6.121 \| good	0.374 \| good
2026-07-17T09:00:00.000Z	81 \| moderate	25.195 \| fine	106.931 \| fine	19.736 \| good	0.401 \| good	5.041 \| good	0.287 \| good
2026-07-17T10:00:00.000Z	81 \| moderate	25.287 \| fine	65.53 \| fine	22.442 \| good	0.366 \| good	5.24 \| good	0.345 \| good
2026-07-17T11:00:00.000Z	73 \| moderate	21.228 \| fine	86.094 \| fine	19.117 \| good	0.353 \| good	4.863 \| good	0.315 \| good
2026-07-17T12:00:00.000Z	71 \| moderate	20.128 \| fine	49.861 \| good	18.446 \| good	0.479 \| good	3.028 \| good	0.285 \| good
2026-07-17T13:00:00.000Z	69 \| moderate	19.181 \| fine	49.022 \| good	19.897 \| good	0.48 \| good	2.522 \| good	0.188 \| good
2026-07-17T14:00:00.000Z	56 \| moderate	11.864 \| good	43.972 \| good	23.509 \| good	0.59 \| good	3.868 \| good	0.186 \| good
2026-07-17T15:00:00.000Z	49 \| good	8.984 \| good	33.163 \| good	22.672 \| good	0.59 \| good	3.778 \| good	0.189 \| good
2026-07-17T16:00:00.000Z	49 \| good	8.879 \| good	21.893 \| good	25.858 \| good	0.382 \| good	3.026 \| good	0.189 \| good
2026-07-17T17:00:00.000Z	49 \| good	8.644 \| good	18.328 \| good	27.683 \| good	0.422 \| good	2.676 \| good	0.201 \| good
2026-07-17T18:00:00.000Z	44 \| good	7.838 \| good	22.611 \| good	30.909 \| good	0.422 \| good	3.059 \| good	0.186 \| good
2026-07-17T19:00:00.000Z	38 \| good	7.206 \| good	19.899 \| good	33.344 \| good	0.428 \| good	3.113 \| good	0.186 \| good
2026-07-17T20:00:00.000Z	38 \| good	7.354 \| good	22.432 \| good	33.679 \| good	0.489 \| good	4.266 \| good	0.209 \| good
2026-07-17T21:00:00.000Z	34 \| good	6.38 \| good	23.661 \| good	37.447 \| good	0.453 \| good	2.74 \| good	0.204 \| good
2026-07-17T22:00:00.000Z	35 \| good	5.836 \| good	18.133 \| good	38.395 \| good	0.395 \| good	3.775 \| good	0.215 \| good
2026-07-17T23:00:00.000Z	33 \| good	4.986 \| good	19.605 \| good	36.482 \| good	0.423 \| good	3.632 \| good	0.245 \| good
2026-07-18T00:00:00.000Z	37 \| good	5.374 \| good	24.243 \| good	39.533 \| good	0.392 \| good	4.06 \| good	0.258 \| good
2026-07-18T01:00:00.000Z	38 \| good	6.672 \| good	25.535 \| good	36.094 \| good	0.418 \| good	6.554 \| good	0.275 \| good
2026-07-18T02:00:00.000Z	38 \| good	6.571 \| good	20.166 \| good	32.185 \| good	0.421 \| good	9.956 \| good	0.344 \| good
2026-07-18T03:00:00.000Z	44 \| good	7.882 \| good	23.714 \| good	23.849 \| good	0.465 \| good	8.009 \| good	0.485 \| good
2026-07-18T04:00:00.000Z	44 \| good	7.808 \| good	23.971 \| good	23.101 \| good	0.404 \| good	8.766 \| good	0.497 \| good
2026-07-18T05:00:00.000Z	44 \| good	8.43 \| good	19.826 \| good	22.055 \| good	0.404 \| good	10.64 \| good	0.354 \| good
2026-07-18T06:00:00.000Z	44 \| good	8.02 \| good	17.148 \| good	14.843 \| good	0.404 \| good	10.094 \| good	0.327 \| good
2026-07-18T07:00:00.000Z	44 \| good	8.332 \| good	19.88 \| good	13.111 \| good	0.405 \| good	11.996 \| good	0.3 \| good
2026-07-18T08:00:00.000Z	44 \| good	7.931 \| good	33.682 \| good	11.471 \| good	0.441 \| good	9.393 \| good	0.257 \| good
2026-07-18T09:00:00.000Z	38 \| good	7.458 \| good	26.3 \| good	16.306 \| good	0.488 \| good	7.943 \| good	0.228 \| good
2026-07-18T09:00:00.000Z	44 \| good	7.931 \| good	33.682 \| good	11.471 \| good	0.441 \| good	9.393 \| good	0.257 \| good
2026-07-18T10:00:00.000Z	49 \| good	9.241 \| good	41.081 \| good	15.726 \| good	0.303 \| good	7.78 \| good	0.238 \| good
2026-07-18T11:00:00.000Z	64 \| moderate	15.855 \| fine	70.068 \| fine	21.357 \| good	0.317 \| good	5.634 \| good	0.238 \| good
2026-07-18T12:00:00.000Z	92 \| moderate	30.531 \| fine	132.945 \| fine	31.779 \| good	0.329 \| good	4.391 \| good	0.25 \| good
2026-07-18T13:00:00.000Z	112 \| sensitive	40.237 \| moderate	177.596 \| moderate	39.535 \| good	0.402 \| good	2.723 \| good	0.256 \| good
2026-07-18T14:00:00.000Z	110 \| sensitive	38.622 \| moderate	169.7 \| moderate	42.906 \| good	0.476 \| good	1.712 \| good	0.268 \| good
2026-07-18T15:00:00.000Z	107 \| sensitive	37.92 \| moderate	166.294 \| moderate	44.985 \| good	0.522 \| good	1.085 \| good	0.284 \| good
2026-07-18T16:00:00.000Z	98 \| moderate	34.269 \| fine	148.537 \| fine	45.765 \| good	0.54 \| good	0.796 \| good	0.292 \| good
2026-07-18T17:00:00.000Z	122 \| sensitive	43.843 \| moderate	195.504 \| moderate	48.245 \| good	0.512 \| good	0.826 \| good	0.3 \| good
2026-07-18T18:00:00.000Z	165 \| unhealthy	75.143 \| poor	275.204 \| poor	50.057 \| good	0.434 \| good	1.009 \| good	0.301 \| good
2026-07-18T19:00:00.000Z	182 \| unhealthy	100.457 \| poor	301.648 \| poor	48.693 \| good	0.372 \| good	1.311 \| good	0.299 \| good
2026-07-18T20:00:00.000Z	170 \| unhealthy	83.209 \| poor	283.789 \| poor	41.705 \| good	0.335 \| good	1.445 \| good	0.293 \| good
2026-07-18T21:00:00.000Z	165 \| unhealthy	76.45 \| poor	276.239 \| poor	43.313 \| good	0.313 \| good	1.514 \| good	0.29 \| good
2026-07-18T22:00:00.000Z	159 \| unhealthy	66.662 \| poor	266.791 \| poor	43.719 \| good	0.303 \| good	1.682 \| good	0.284 \| good
2026-07-18T23:00:00.000Z	137 \| sensitive	49.794 \| moderate	225.43 \| moderate	44.49 \| good	0.311 \| good	2.144 \| good	0.281 \| good
2026-07-19T00:00:00.000Z	77 \| moderate	23.149 \| fine	101.185 \| fine	48.144 \| good	0.35 \| good	2.501 \| good	0.276 \| good
2026-07-19T01:00:00.000Z	69 \| moderate	18.671 \| fine	82.796 \| fine	46.68 \| good	0.436 \| good	2.422 \| good	0.266 \| good
2026-07-19T02:00:00.000Z	71 \| moderate	19.557 \| fine	86.207 \| fine	43.6 \| good	0.507 \| good	2.487 \| good	0.261 \| good
2026-07-19T03:00:00.000Z	62 \| moderate	15.017 \| fine	66.887 \| fine	41.923 \| good	0.554 \| good	2.575 \| good	0.262 \| good
2026-07-19T04:00:00.000Z	62 \| moderate	14.727 \| fine	65.708 \| fine	40.539 \| good	0.554 \| good	2.436 \| good	0.263 \| good
2026-07-19T05:00:00.000Z	60 \| moderate	14.304 \| fine	63.605 \| fine	35.201 \| good	0.501 \| good	2.18 \| good	0.258 \| good
2026-07-19T06:00:00.000Z	58 \| moderate	12.601 \| fine	57.103 \| fine	36.112 \| good	0.432 \| good	1.919 \| good	0.247 \| good
2026-07-19T07:00:00.000Z	56 \| moderate	11.851 \| good	52.684 \| good	34.843 \| good	0.375 \| good	1.706 \| good	0.234 \| good
2026-07-19T08:00:00.000Z	62 \| moderate	14.784 \| fine	65.809 \| fine	35.883 \| good	0.334 \| good	1.477 \| good	0.229 \| good
2026-07-19T09:00:00.000Z	71 \| moderate	20.431 \| fine	89.373 \| fine	38.175 \| good	0.311 \| good	1.21 \| good	0.244 \| good
2026-07-19T10:00:00.000Z	84 \| moderate	26.801 \| fine	116.037 \| fine	35.326 \| good	0.28 \| good	1.059 \| good	0.251 \| good
2026-07-19T11:00:00.000Z	115 \| sensitive	40.98 \| moderate	181.826 \| moderate	36.299 \| good	0.219 \| good	0.91 \| good	0.228 \| good
2026-07-19T12:00:00.000Z	124 \| sensitive	44.507 \| moderate	199.49 \| moderate	38.095 \| good	0.163 \| good	0.815 \| good	0.194 \| good
2026-07-19T13:00:00.000Z	92 \| moderate	31.462 \| fine	136.028 \| fine	34.688 \| good	0.125 \| good	0.687 \| good	0.168 \| good
2026-07-19T14:00:00.000Z	71 \| moderate	20.133 \| fine	88.132 \| fine	30.971 \| good	0.11 \| good	0.549 \| good	0.155 \| good
2026-07-19T15:00:00.000Z	69 \| moderate	19.086 \| fine	84.555 \| fine	30.759 \| good	0.11 \| good	0.446 \| good	0.153 \| good
2026-07-19T16:00:00.000Z	71 \| moderate	19.993 \| fine	87.329 \| fine	30.854 \| good	0.108 \| good	0.375 \| good	0.154 \| good
2026-07-19T17:00:00.000Z	66 \| moderate	16.681 \| fine	74.177 \| fine	29.327 \| good	0.105 \| good	0.342 \| good	0.155 \| good
2026-07-19T18:00:00.000Z	56 \| moderate	11.947 \| good	53.465 \| good	27.877 \| good	0.1 \| good	0.336 \| good	0.156 \| good
2026-07-19T19:00:00.000Z	52 \| moderate	10.428 \| good	46.029 \| good	27.252 \| good	0.093 \| good	0.34 \| good	0.155 \| good
2026-07-19T20:00:00.000Z	56 \| moderate	11.964 \| good	53.567 \| good	26.863 \| good	0.086 \| good	0.363 \| good	0.152 \| good
2026-07-19T21:00:00.000Z	60 \| moderate	14.05 \| fine	63 \| fine	26.458 \| good	0.08 \| good	0.426 \| good	0.148 \| good
2026-07-19T22:00:00.000Z	62 \| moderate	14.892 \| fine	67.012 \| fine	26.764 \| good	0.078 \| good	0.568 \| good	0.143 \| good
2026-07-19T23:00:00.000Z	58 \| moderate	12.677 \| fine	56.796 \| fine	24.257 \| good	0.08 \| good	0.975 \| good	0.14 \| good
2026-07-20T00:00:00.000Z	54 \| moderate	10.801 \| good	47.8 \| good	22.915 \| good	0.089 \| good	1.935 \| good	0.141 \| good
2026-07-20T01:00:00.000Z	52 \| moderate	10.4 \| good	46.273 \| good	23.259 \| good	0.108 \| good	3.735 \| good	0.151 \| good
2026-07-20T02:00:00.000Z	52 \| moderate	9.714 \| good	43.565 \| good	22.706 \| good	0.127 \| good	5.193 \| good	0.159 \| good
2026-07-20T03:00:00.000Z	52 \| moderate	9.755 \| good	43.68 \| good	21.839 \| good	0.142 \| good	6.163 \| good	0.164 \| good
2026-07-20T04:00:00.000Z	52 \| moderate	9.882 \| good	43.95 \| good	20.951 \| good	0.144 \| good	6.135 \| good	0.164 \| good
2026-07-20T05:00:00.000Z	52 \| moderate	9.608 \| good	42.904 \| good	19.746 \| good	0.134 \| good	5.418 \| good	0.158 \| good
2026-07-20T06:00:00.000Z	27 \| good	4.953 \| good	5.106 \| good	27.518 \| good	0.132 \| good	4.853 \| good	0.15 \| good
2026-07-20T07:00:00.000Z	49 \| good	8.691 \| good	38.053 \| good	17.635 \| good	0.132 \| good	4.4 \| good	0.143 \| good
2026-07-20T08:00:00.000Z	49 \| good	9.292 \| good	41.182 \| good	16.177 \| good	0.134 \| good	3.987 \| good	0.137 \| good
2026-07-20T09:00:00.000Z	52 \| moderate	9.83 \| good	43.985 \| good	15.178 \| good	0.136 \| good	3.84 \| good	0.133 \| good

Westborough

Empower business decisions with accurate air quality data

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

0.27ppm

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 Westborough, Massachusetts updated?

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

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

The worst air quality in Westborough, Massachusetts was recorded at 10:00:00 on 2026-07-17.

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

The best air quality in Westborough, Massachusetts was recorded at 11:00:00 on 2026-07-17.

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

The real-time air quality index in Westborough, Massachusetts is 44, currently categorized as Good.

Which pollutant is found most often in Westborough, Massachusetts?

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

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

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

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

The measured PM_2.5 levels in Westborough, Massachusetts at present are 7.931 μg/m³.

What are the current PM₁₀ levels at Westborough, Massachusetts?

The current PM₁₀ levels in Westborough, Massachusetts are 33.682 μg/m³.

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

The current carbon monoxide (CO) level in Westborough, Massachusetts is 0.257 ppm.

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

The current sulfur dioxide (SO₂) levels in Westborough, Massachusetts are 0.441 ppb.

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

The current ozone (O₃) levels at Westborough, Massachusetts is 11.471 ppm.

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

The current nitrogen dioxide (NO₂) levels at Westborough, Massachusetts is 9.393 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-16T10:00:00.000Z	62 \| moderate	14.591 \| fine	68.747 \| fine	19.426 \| good	0.299 \| good	13.962 \| good	0.288 \| good
2026-07-16T11:00:00.000Z	67 \| moderate	17.908 \| fine	41.79 \| good	19.942 \| good	0.365 \| good	10.993 \| good	0.317 \| good
2026-07-16T12:00:00.000Z	97 \| moderate	33.767 \| fine	143.928 \| fine	13.23 \| good	0.377 \| good	6.341 \| good	0.272 \| good
2026-07-16T13:00:00.000Z	147 \| sensitive	54.052 \| moderate	156.457 \| moderate	17.157 \| good	0.377 \| good	3.503 \| good	0.228 \| good
2026-07-16T14:00:00.000Z	67 \| moderate	17.867 \| fine	48.465 \| good	19.668 \| good	0.321 \| good	4.853 \| good	0.243 \| good
2026-07-16T15:00:00.000Z	88 \| moderate	29.003 \| fine	128.774 \| fine	23.54 \| good	0.461 \| good	3.689 \| good	0.243 \| good
2026-07-16T16:00:00.000Z	79 \| moderate	24.017 \| fine	111.626 \| fine	23.415 \| good	0.461 \| good	3.124 \| good	0.23 \| good
2026-07-16T17:00:00.000Z	58 \| moderate	13.01 \| fine	46.656 \| good	30.335 \| good	0.509 \| good	3.774 \| good	0.286 \| good
2026-07-16T18:00:00.000Z	92 \| moderate	31.461 \| fine	128.456 \| fine	29.742 \| good	0.521 \| good	4.555 \| good	0.243 \| good
2026-07-16T19:00:00.000Z	66 \| moderate	17.195 \| fine	53.488 \| good	30.262 \| good	0.537 \| good	3.575 \| good	0.243 \| good
2026-07-16T20:00:00.000Z	64 \| moderate	15.946 \| fine	60.915 \| fine	35.275 \| good	0.587 \| good	3.822 \| good	0.287 \| good
2026-07-16T21:00:00.000Z	153 \| unhealthy	57.945 \| poor	192.757 \| moderate	36.906 \| good	0.536 \| good	2.902 \| good	0.42 \| good
2026-07-16T22:00:00.000Z	209 \| vUnhealthy	134.032 \| poor	298.161 \| poor	36.755 \| good	0.54 \| good	3.113 \| good	0.371 \| good
2026-07-16T23:00:00.000Z	165 \| unhealthy	49.264 \| moderate	284.492 \| poor	37.446 \| good	0.51 \| good	2.368 \| good	0.431 \| good
2026-07-17T00:00:00.000Z	198 \| unhealthy	115.406 \| poor	350.376 \| poor	35.812 \| good	0.462 \| good	2.738 \| good	0.359 \| good
2026-07-17T01:00:00.000Z	189 \| unhealthy	94.411 \| poor	331.175 \| poor	36.046 \| good	0.461 \| good	2.664 \| good	0.345 \| good
2026-07-17T02:00:00.000Z	166 \| unhealthy	39.217 \| moderate	284.765 \| poor	31.537 \| good	0.477 \| good	2.362 \| good	0.357 \| good
2026-07-17T03:00:00.000Z	153 \| unhealthy	58.871 \| poor	220.153 \| moderate	23.5 \| good	0.461 \| good	5.818 \| good	0.4 \| good
2026-07-17T04:00:00.000Z	90 \| moderate	29.553 \| fine	103.417 \| fine	25.909 \| good	0.447 \| good	4.968 \| good	0.427 \| good
2026-07-17T05:00:00.000Z	92 \| moderate	30.961 \| fine	42.597 \| good	25.955 \| good	0.339 \| good	3.559 \| good	0.427 \| good
2026-07-17T06:00:00.000Z	94 \| moderate	31.602 \| fine	75.127 \| fine	23.337 \| good	0.342 \| good	3.767 \| good	0.399 \| good
2026-07-17T07:00:00.000Z	94 \| moderate	31.727 \| fine	74.044 \| fine	24.386 \| good	0.342 \| good	3.613 \| good	0.399 \| good
2026-07-17T08:00:00.000Z	82 \| moderate	25.965 \| fine	94.847 \| fine	18.522 \| good	0.353 \| good	6.121 \| good	0.374 \| good
2026-07-17T09:00:00.000Z	81 \| moderate	25.195 \| fine	106.931 \| fine	19.736 \| good	0.401 \| good	5.041 \| good	0.287 \| good
2026-07-17T10:00:00.000Z	81 \| moderate	25.287 \| fine	65.53 \| fine	22.442 \| good	0.366 \| good	5.24 \| good	0.345 \| good
2026-07-17T11:00:00.000Z	73 \| moderate	21.228 \| fine	86.094 \| fine	19.117 \| good	0.353 \| good	4.863 \| good	0.315 \| good
2026-07-17T12:00:00.000Z	71 \| moderate	20.128 \| fine	49.861 \| good	18.446 \| good	0.479 \| good	3.028 \| good	0.285 \| good
2026-07-17T13:00:00.000Z	69 \| moderate	19.181 \| fine	49.022 \| good	19.897 \| good	0.48 \| good	2.522 \| good	0.188 \| good
2026-07-17T14:00:00.000Z	56 \| moderate	11.864 \| good	43.972 \| good	23.509 \| good	0.59 \| good	3.868 \| good	0.186 \| good
2026-07-17T15:00:00.000Z	49 \| good	8.984 \| good	33.163 \| good	22.672 \| good	0.59 \| good	3.778 \| good	0.189 \| good
2026-07-17T16:00:00.000Z	49 \| good	8.879 \| good	21.893 \| good	25.858 \| good	0.382 \| good	3.026 \| good	0.189 \| good
2026-07-17T17:00:00.000Z	49 \| good	8.644 \| good	18.328 \| good	27.683 \| good	0.422 \| good	2.676 \| good	0.201 \| good
2026-07-17T18:00:00.000Z	44 \| good	7.838 \| good	22.611 \| good	30.909 \| good	0.422 \| good	3.059 \| good	0.186 \| good
2026-07-17T19:00:00.000Z	38 \| good	7.206 \| good	19.899 \| good	33.344 \| good	0.428 \| good	3.113 \| good	0.186 \| good
2026-07-17T20:00:00.000Z	38 \| good	7.354 \| good	22.432 \| good	33.679 \| good	0.489 \| good	4.266 \| good	0.209 \| good
2026-07-17T21:00:00.000Z	34 \| good	6.38 \| good	23.661 \| good	37.447 \| good	0.453 \| good	2.74 \| good	0.204 \| good
2026-07-17T22:00:00.000Z	35 \| good	5.836 \| good	18.133 \| good	38.395 \| good	0.395 \| good	3.775 \| good	0.215 \| good
2026-07-17T23:00:00.000Z	33 \| good	4.986 \| good	19.605 \| good	36.482 \| good	0.423 \| good	3.632 \| good	0.245 \| good
2026-07-18T00:00:00.000Z	37 \| good	5.374 \| good	24.243 \| good	39.533 \| good	0.392 \| good	4.06 \| good	0.258 \| good
2026-07-18T01:00:00.000Z	38 \| good	6.672 \| good	25.535 \| good	36.094 \| good	0.418 \| good	6.554 \| good	0.275 \| good
2026-07-18T02:00:00.000Z	38 \| good	6.571 \| good	20.166 \| good	32.185 \| good	0.421 \| good	9.956 \| good	0.344 \| good
2026-07-18T03:00:00.000Z	44 \| good	7.882 \| good	23.714 \| good	23.849 \| good	0.465 \| good	8.009 \| good	0.485 \| good
2026-07-18T04:00:00.000Z	44 \| good	7.808 \| good	23.971 \| good	23.101 \| good	0.404 \| good	8.766 \| good	0.497 \| good
2026-07-18T05:00:00.000Z	44 \| good	8.43 \| good	19.826 \| good	22.055 \| good	0.404 \| good	10.64 \| good	0.354 \| good
2026-07-18T06:00:00.000Z	44 \| good	8.02 \| good	17.148 \| good	14.843 \| good	0.404 \| good	10.094 \| good	0.327 \| good
2026-07-18T07:00:00.000Z	44 \| good	8.332 \| good	19.88 \| good	13.111 \| good	0.405 \| good	11.996 \| good	0.3 \| good
2026-07-18T08:00:00.000Z	44 \| good	7.931 \| good	33.682 \| good	11.471 \| good	0.441 \| good	9.393 \| good	0.257 \| good
2026-07-18T09:00:00.000Z	38 \| good	7.458 \| good	26.3 \| good	16.306 \| good	0.488 \| good	7.943 \| good	0.228 \| good
2026-07-18T09:00:00.000Z	44 \| good	7.931 \| good	33.682 \| good	11.471 \| good	0.441 \| good	9.393 \| good	0.257 \| good
2026-07-18T10:00:00.000Z	49 \| good	9.241 \| good	41.081 \| good	15.726 \| good	0.303 \| good	7.78 \| good	0.238 \| good
2026-07-18T11:00:00.000Z	64 \| moderate	15.855 \| fine	70.068 \| fine	21.357 \| good	0.317 \| good	5.634 \| good	0.238 \| good
2026-07-18T12:00:00.000Z	92 \| moderate	30.531 \| fine	132.945 \| fine	31.779 \| good	0.329 \| good	4.391 \| good	0.25 \| good
2026-07-18T13:00:00.000Z	112 \| sensitive	40.237 \| moderate	177.596 \| moderate	39.535 \| good	0.402 \| good	2.723 \| good	0.256 \| good
2026-07-18T14:00:00.000Z	110 \| sensitive	38.622 \| moderate	169.7 \| moderate	42.906 \| good	0.476 \| good	1.712 \| good	0.268 \| good
2026-07-18T15:00:00.000Z	107 \| sensitive	37.92 \| moderate	166.294 \| moderate	44.985 \| good	0.522 \| good	1.085 \| good	0.284 \| good
2026-07-18T16:00:00.000Z	98 \| moderate	34.269 \| fine	148.537 \| fine	45.765 \| good	0.54 \| good	0.796 \| good	0.292 \| good
2026-07-18T17:00:00.000Z	122 \| sensitive	43.843 \| moderate	195.504 \| moderate	48.245 \| good	0.512 \| good	0.826 \| good	0.3 \| good
2026-07-18T18:00:00.000Z	165 \| unhealthy	75.143 \| poor	275.204 \| poor	50.057 \| good	0.434 \| good	1.009 \| good	0.301 \| good
2026-07-18T19:00:00.000Z	182 \| unhealthy	100.457 \| poor	301.648 \| poor	48.693 \| good	0.372 \| good	1.311 \| good	0.299 \| good
2026-07-18T20:00:00.000Z	170 \| unhealthy	83.209 \| poor	283.789 \| poor	41.705 \| good	0.335 \| good	1.445 \| good	0.293 \| good
2026-07-18T21:00:00.000Z	165 \| unhealthy	76.45 \| poor	276.239 \| poor	43.313 \| good	0.313 \| good	1.514 \| good	0.29 \| good
2026-07-18T22:00:00.000Z	159 \| unhealthy	66.662 \| poor	266.791 \| poor	43.719 \| good	0.303 \| good	1.682 \| good	0.284 \| good
2026-07-18T23:00:00.000Z	137 \| sensitive	49.794 \| moderate	225.43 \| moderate	44.49 \| good	0.311 \| good	2.144 \| good	0.281 \| good
2026-07-19T00:00:00.000Z	77 \| moderate	23.149 \| fine	101.185 \| fine	48.144 \| good	0.35 \| good	2.501 \| good	0.276 \| good
2026-07-19T01:00:00.000Z	69 \| moderate	18.671 \| fine	82.796 \| fine	46.68 \| good	0.436 \| good	2.422 \| good	0.266 \| good
2026-07-19T02:00:00.000Z	71 \| moderate	19.557 \| fine	86.207 \| fine	43.6 \| good	0.507 \| good	2.487 \| good	0.261 \| good
2026-07-19T03:00:00.000Z	62 \| moderate	15.017 \| fine	66.887 \| fine	41.923 \| good	0.554 \| good	2.575 \| good	0.262 \| good
2026-07-19T04:00:00.000Z	62 \| moderate	14.727 \| fine	65.708 \| fine	40.539 \| good	0.554 \| good	2.436 \| good	0.263 \| good
2026-07-19T05:00:00.000Z	60 \| moderate	14.304 \| fine	63.605 \| fine	35.201 \| good	0.501 \| good	2.18 \| good	0.258 \| good
2026-07-19T06:00:00.000Z	58 \| moderate	12.601 \| fine	57.103 \| fine	36.112 \| good	0.432 \| good	1.919 \| good	0.247 \| good
2026-07-19T07:00:00.000Z	56 \| moderate	11.851 \| good	52.684 \| good	34.843 \| good	0.375 \| good	1.706 \| good	0.234 \| good
2026-07-19T08:00:00.000Z	62 \| moderate	14.784 \| fine	65.809 \| fine	35.883 \| good	0.334 \| good	1.477 \| good	0.229 \| good
2026-07-19T09:00:00.000Z	71 \| moderate	20.431 \| fine	89.373 \| fine	38.175 \| good	0.311 \| good	1.21 \| good	0.244 \| good
2026-07-19T10:00:00.000Z	84 \| moderate	26.801 \| fine	116.037 \| fine	35.326 \| good	0.28 \| good	1.059 \| good	0.251 \| good
2026-07-19T11:00:00.000Z	115 \| sensitive	40.98 \| moderate	181.826 \| moderate	36.299 \| good	0.219 \| good	0.91 \| good	0.228 \| good
2026-07-19T12:00:00.000Z	124 \| sensitive	44.507 \| moderate	199.49 \| moderate	38.095 \| good	0.163 \| good	0.815 \| good	0.194 \| good
2026-07-19T13:00:00.000Z	92 \| moderate	31.462 \| fine	136.028 \| fine	34.688 \| good	0.125 \| good	0.687 \| good	0.168 \| good
2026-07-19T14:00:00.000Z	71 \| moderate	20.133 \| fine	88.132 \| fine	30.971 \| good	0.11 \| good	0.549 \| good	0.155 \| good
2026-07-19T15:00:00.000Z	69 \| moderate	19.086 \| fine	84.555 \| fine	30.759 \| good	0.11 \| good	0.446 \| good	0.153 \| good
2026-07-19T16:00:00.000Z	71 \| moderate	19.993 \| fine	87.329 \| fine	30.854 \| good	0.108 \| good	0.375 \| good	0.154 \| good
2026-07-19T17:00:00.000Z	66 \| moderate	16.681 \| fine	74.177 \| fine	29.327 \| good	0.105 \| good	0.342 \| good	0.155 \| good
2026-07-19T18:00:00.000Z	56 \| moderate	11.947 \| good	53.465 \| good	27.877 \| good	0.1 \| good	0.336 \| good	0.156 \| good
2026-07-19T19:00:00.000Z	52 \| moderate	10.428 \| good	46.029 \| good	27.252 \| good	0.093 \| good	0.34 \| good	0.155 \| good
2026-07-19T20:00:00.000Z	56 \| moderate	11.964 \| good	53.567 \| good	26.863 \| good	0.086 \| good	0.363 \| good	0.152 \| good
2026-07-19T21:00:00.000Z	60 \| moderate	14.05 \| fine	63 \| fine	26.458 \| good	0.08 \| good	0.426 \| good	0.148 \| good
2026-07-19T22:00:00.000Z	62 \| moderate	14.892 \| fine	67.012 \| fine	26.764 \| good	0.078 \| good	0.568 \| good	0.143 \| good
2026-07-19T23:00:00.000Z	58 \| moderate	12.677 \| fine	56.796 \| fine	24.257 \| good	0.08 \| good	0.975 \| good	0.14 \| good
2026-07-20T00:00:00.000Z	54 \| moderate	10.801 \| good	47.8 \| good	22.915 \| good	0.089 \| good	1.935 \| good	0.141 \| good
2026-07-20T01:00:00.000Z	52 \| moderate	10.4 \| good	46.273 \| good	23.259 \| good	0.108 \| good	3.735 \| good	0.151 \| good
2026-07-20T02:00:00.000Z	52 \| moderate	9.714 \| good	43.565 \| good	22.706 \| good	0.127 \| good	5.193 \| good	0.159 \| good
2026-07-20T03:00:00.000Z	52 \| moderate	9.755 \| good	43.68 \| good	21.839 \| good	0.142 \| good	6.163 \| good	0.164 \| good
2026-07-20T04:00:00.000Z	52 \| moderate	9.882 \| good	43.95 \| good	20.951 \| good	0.144 \| good	6.135 \| good	0.164 \| good
2026-07-20T05:00:00.000Z	52 \| moderate	9.608 \| good	42.904 \| good	19.746 \| good	0.134 \| good	5.418 \| good	0.158 \| good
2026-07-20T06:00:00.000Z	27 \| good	4.953 \| good	5.106 \| good	27.518 \| good	0.132 \| good	4.853 \| good	0.15 \| good
2026-07-20T07:00:00.000Z	49 \| good	8.691 \| good	38.053 \| good	17.635 \| good	0.132 \| good	4.4 \| good	0.143 \| good
2026-07-20T08:00:00.000Z	49 \| good	9.292 \| good	41.182 \| good	16.177 \| good	0.134 \| good	3.987 \| good	0.137 \| good
2026-07-20T09:00:00.000Z	52 \| moderate	9.83 \| good	43.985 \| good	15.178 \| good	0.136 \| good	3.84 \| good	0.133 \| good

Real-time air quality index in Westborough, Massachusetts today

Common air pollutants in Westborough, Massachusetts

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Westborough, Massachusetts air quality forecast and history

Empower business decisions with accurate air quality data

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

Air quality in nearby cities

Northborough, Massachusetts

Southborough, Massachusetts

Hopkinton, Massachusetts

Grafton, Massachusetts

Shrewsbury, Massachusetts

Marlborough, 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 Westborough, Massachusetts updated?

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

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

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

Which pollutant is found most often in Westborough, Massachusetts?

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

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

What are the current PM10 levels at Westborough, Massachusetts?

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

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

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

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

What are the current PM₁₀ levels at Westborough, Massachusetts?

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

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

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