What is the sulfur dioxide (SO2) level in Leicester, Massachusetts at the moment?

Currently, Leicester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.116 ppb.

What is the ozone (O3) level in Leicester, Massachusetts at the moment?

The current ozone (O3) level in Leicester, Massachusetts at the moment is 34.952 ppm.

What is the nitrogen dioxide (NO2) level in Leicester, Massachusetts at the moment?

Nitrogen dioxide (NO2) level in Leicester, Massachusetts at the moment is 3.778 ppb.

Live air quality index in Leicester, Massachusetts today

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

Stay updated with real-time air quality in Leicester, 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

Leicester, Massachusetts

Last updated: ... (Local time)

Major air pollutants in Leicester, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

17.80 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

65.42 μg/m³

155

255

425

605+

Ozone (O₃)

27.91 ppb

201

201+

Sulfur Dioxide (SO₂)

0.11 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.37 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.37 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Leicester, Massachusetts

Get Live Pollen Counts

Leicester, Massachusetts

Scroll To Air Quality Map

Track live Leicester, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-29T16:00:00.000Z	58 \| moderate	13.028 \| fine	24.569 \| good	34.952 \| good	0.116 \| good	3.778 \| good	0.289 \| good
2025-07-29T17:00:00.000Z	58 \| moderate	12.903 \| fine	30.681 \| good	39.792 \| good	0.22 \| good	3.424 \| good	0.289 \| good
2025-07-29T18:00:00.000Z	56 \| moderate	11.83 \| good	28.362 \| good	42.895 \| good	0.206 \| good	3.932 \| good	0.228 \| good
2025-07-29T19:00:00.000Z	56 \| moderate	11.598 \| good	25.557 \| good	43.299 \| good	0.213 \| good	4.763 \| good	0.279 \| good
2025-07-29T20:00:00.000Z	56 \| moderate	11.865 \| good	27.392 \| good	42.5 \| good	0.327 \| good	2.876 \| good	0.295 \| good
2025-07-29T21:00:00.000Z	54 \| moderate	10.842 \| good	23.986 \| good	42.374 \| good	0.32 \| good	2.725 \| good	0.298 \| good
2025-07-29T22:00:00.000Z	52 \| moderate	10.297 \| good	19.984 \| good	42.63 \| good	0.319 \| good	2.914 \| good	0.29 \| good
2025-07-29T23:00:00.000Z	52 \| moderate	9.983 \| good	23.587 \| good	44.887 \| good	0.275 \| good	3.118 \| good	0.29 \| good
2025-07-30T00:00:00.000Z	49 \| good	9.423 \| good	31.575 \| good	45.619 \| good	0.275 \| good	4.199 \| good	0.246 \| good
2025-07-30T01:00:00.000Z	44 \| good	8.35 \| good	16.552 \| good	43.253 \| good	0.251 \| good	4.268 \| good	0.217 \| good
2025-07-30T02:00:00.000Z	44 \| good	7.894 \| good	19.354 \| good	41.599 \| good	0.129 \| good	6.817 \| good	0.235 \| good
2025-07-30T03:00:00.000Z	64 \| moderate	15.575 \| fine	69.11 \| fine	29.346 \| good	0.543 \| good	6.388 \| good	0.226 \| good
2025-07-30T04:00:00.000Z	52 \| moderate	10.171 \| good	28.225 \| good	35.906 \| good	0.226 \| good	10.596 \| good	0.309 \| good
2025-07-30T05:00:00.000Z	49 \| good	8.686 \| good	27.115 \| good	35.905 \| good	0.363 \| good	14.906 \| good	0.332 \| good
2025-07-30T06:00:00.000Z	52 \| moderate	10.456 \| good	20.906 \| good	35.937 \| good	0.285 \| good	16.034 \| good	0.276 \| good
2025-07-30T07:00:00.000Z	59 \| moderate	10.75 \| good	71.31 \| fine	36.592 \| good	0.235 \| good	9.416 \| good	0.251 \| good
2025-07-30T08:00:00.000Z	49 \| good	8.941 \| good	33.046 \| good	36.575 \| good	0.255 \| good	12.599 \| good	0.257 \| good
2025-07-30T09:00:00.000Z	49 \| good	8.99 \| good	47.88 \| good	33.819 \| good	0.227 \| good	10.909 \| good	0.235 \| good
2025-07-30T10:00:00.000Z	44 \| good	8.43 \| good	22.822 \| good	32.663 \| good	0.174 \| good	8.742 \| good	0.254 \| good
2025-07-30T11:00:00.000Z	44 \| good	8.469 \| good	17.805 \| good	31.779 \| good	0.172 \| good	8.097 \| good	0.325 \| good
2025-07-30T12:00:00.000Z	49 \| good	8.632 \| good	31.281 \| good	28.549 \| good	0.265 \| good	7.48 \| good	0.369 \| good
2025-07-30T13:00:00.000Z	49 \| good	8.594 \| good	31.08 \| good	29.561 \| good	0.195 \| good	6.915 \| good	0.351 \| good
2025-07-30T14:00:00.000Z	49 \| good	9.134 \| good	34.878 \| good	31.374 \| good	0.128 \| good	5.157 \| good	0.289 \| good
2025-07-30T15:00:00.000Z	44 \| good	8.035 \| good	18.37 \| good	35.202 \| good	0.201 \| good	8.093 \| good	0.289 \| good
2025-07-30T16:00:00.000Z	49 \| good	9.455 \| good	46.922 \| good	38.67 \| good	0.249 \| good	6.891 \| good	0.281 \| good
2025-07-30T17:00:00.000Z	53 \| moderate	9.072 \| good	59.873 \| fine	40.36 \| good	0.26 \| good	3.74 \| good	0.277 \| good
2025-07-30T18:00:00.000Z	44 \| good	8.498 \| good	37.404 \| good	39.936 \| good	0.274 \| good	2.782 \| good	0.214 \| good
2025-07-30T19:00:00.000Z	44 \| good	8.332 \| good	22.282 \| good	43.533 \| good	0.258 \| good	2.852 \| good	0.224 \| good
2025-07-30T20:00:00.000Z	44 \| good	7.924 \| good	21.286 \| good	43.602 \| good	0.221 \| good	2.985 \| good	0.224 \| good
2025-07-30T21:00:00.000Z	44 \| good	7.984 \| good	19.178 \| good	44.886 \| good	0.246 \| good	3.384 \| good	0.225 \| good
2025-07-30T22:00:00.000Z	44 \| good	8.098 \| good	22.985 \| good	44 \| good	0.266 \| good	3.514 \| good	0.279 \| good
2025-07-30T23:00:00.000Z	44 \| good	8.011 \| good	29.108 \| good	43.433 \| good	0.268 \| good	3.75 \| good	0.235 \| good
2025-07-31T00:00:00.000Z	44 \| good	7.882 \| good	19.09 \| good	41.206 \| good	0.173 \| good	3.695 \| good	0.235 \| good
2025-07-31T01:00:00.000Z	44 \| good	8.14 \| good	28.618 \| good	39.716 \| good	0.209 \| good	3.942 \| good	0.235 \| good
2025-07-31T02:00:00.000Z	49 \| good	8.529 \| good	32.363 \| good	35.784 \| good	0.232 \| good	6.142 \| good	0.226 \| good
2025-07-31T03:00:00.000Z	44 \| good	8.248 \| good	19.781 \| good	36.282 \| good	0.169 \| good	6.727 \| good	0.226 \| good
2025-07-31T04:00:00.000Z	49 \| good	9.132 \| good	36.32 \| good	35.989 \| good	0.208 \| good	7.195 \| good	0.273 \| good
2025-07-31T05:00:00.000Z	49 \| good	8.726 \| good	28.166 \| good	36.031 \| good	0.426 \| good	10.117 \| good	0.286 \| good
2025-07-31T06:00:00.000Z	58 \| moderate	12.782 \| fine	27.058 \| good	36.037 \| good	0.972 \| good	8.624 \| good	0.31 \| good
2025-07-31T07:00:00.000Z	52 \| moderate	10.107 \| good	39.203 \| good	30.992 \| good	0.178 \| good	10.089 \| good	0.256 \| good
2025-07-31T08:00:00.000Z	54 \| moderate	10.849 \| good	43.585 \| good	30.908 \| good	0.302 \| good	11.369 \| good	0.256 \| good
2025-07-31T09:00:00.000Z	49 \| good	8.811 \| good	23.849 \| good	30.415 \| good	0.285 \| good	11.67 \| good	0.227 \| good
2025-07-31T10:00:00.000Z	52 \| moderate	9.993 \| good	23.9 \| good	30.344 \| good	0.324 \| good	4.685 \| good	0.245 \| good
2025-07-31T11:00:00.000Z	56 \| moderate	11.901 \| good	27.714 \| good	30.012 \| good	0.277 \| good	4.108 \| good	0.307 \| good
2025-07-31T12:00:00.000Z	54 \| moderate	11.25 \| good	38.569 \| good	30.214 \| good	0.39 \| good	4.834 \| good	0.297 \| good
2025-07-31T13:00:00.000Z	56 \| moderate	11.955 \| good	20.844 \| good	30.673 \| good	0.29 \| good	4.254 \| good	0.308 \| good
2025-07-31T14:00:00.000Z	67 \| moderate	17.805 \| fine	65.422 \| fine	27.911 \| good	0.11 \| good	4.372 \| good	0.371 \| good
2025-07-31T15:00:00.000Z	71 \| moderate	19.609 \| fine	42.928 \| good	26.069 \| good	0.102 \| good	3.92 \| good	0.371 \| good
2025-07-31T15:00:00.000Z	67 \| moderate	17.805 \| fine	65.422 \| fine	27.911 \| good	0.11 \| good	4.372 \| good	0.371 \| good
2025-07-29T17:00:00.000Z	69 \| moderate	19.183 \| fine	84.997 \| fine	49.749 \| good	0.568 \| good	0.944 \| good	0.184 \| good
2025-07-29T18:00:00.000Z	67 \| moderate	17.518 \| fine	77.192 \| fine	46.516 \| good	0.498 \| good	0.789 \| good	0.169 \| good
2025-07-29T19:00:00.000Z	64 \| moderate	15.826 \| fine	70.792 \| fine	43.874 \| good	0.464 \| good	0.886 \| good	0.166 \| good
2025-07-29T20:00:00.000Z	64 \| moderate	16.19 \| fine	72.735 \| fine	40.235 \| good	0.43 \| good	0.982 \| good	0.162 \| good
2025-07-29T21:00:00.000Z	58 \| moderate	13.082 \| fine	58.986 \| fine	35.166 \| good	0.396 \| good	1.078 \| good	0.159 \| good
2025-07-29T22:00:00.000Z	56 \| moderate	12.132 \| fine	55.02 \| fine	31.434 \| good	0.408 \| good	2.407 \| good	0.174 \| good
2025-07-29T23:00:00.000Z	58 \| moderate	12.721 \| fine	57.125 \| fine	27.793 \| good	0.419 \| good	3.736 \| good	0.189 \| good
2025-07-30T00:00:00.000Z	58 \| moderate	12.67 \| fine	57.124 \| fine	30.622 \| good	0.43 \| good	5.065 \| good	0.204 \| good
2025-07-30T01:00:00.000Z	60 \| moderate	13.733 \| fine	61.227 \| fine	29.863 \| good	0.448 \| good	5.615 \| good	0.211 \| good
2025-07-30T02:00:00.000Z	62 \| moderate	15.335 \| fine	68.986 \| fine	29.259 \| good	0.465 \| good	6.164 \| good	0.218 \| good
2025-07-30T03:00:00.000Z	62 \| moderate	14.754 \| fine	65.322 \| fine	29.923 \| good	0.482 \| good	6.713 \| good	0.226 \| good
2025-07-30T04:00:00.000Z	64 \| moderate	15.565 \| fine	69.214 \| fine	30.151 \| good	0.469 \| good	7.309 \| good	0.236 \| good
2025-07-30T05:00:00.000Z	75 \| moderate	21.805 \| fine	95.228 \| fine	27.201 \| good	0.455 \| good	7.904 \| good	0.247 \| good
2025-07-30T06:00:00.000Z	79 \| moderate	23.692 \| fine	103.062 \| fine	23.674 \| good	0.441 \| good	8.5 \| good	0.257 \| good
2025-07-30T07:00:00.000Z	81 \| moderate	25.047 \| fine	109.127 \| fine	20.122 \| good	0.446 \| good	8.373 \| good	0.262 \| good
2025-07-30T08:00:00.000Z	81 \| moderate	25.286 \| fine	110.895 \| fine	19.388 \| good	0.45 \| good	8.246 \| good	0.267 \| good
2025-07-30T09:00:00.000Z	90 \| moderate	30.217 \| fine	130.911 \| fine	22.125 \| good	0.454 \| good	8.119 \| good	0.272 \| good
2025-07-30T10:00:00.000Z	84 \| moderate	26.726 \| fine	116.921 \| fine	23.89 \| good	0.494 \| good	6.749 \| good	0.275 \| good
2025-07-30T11:00:00.000Z	86 \| moderate	27.852 \| fine	121.038 \| fine	27.269 \| good	0.534 \| good	5.379 \| good	0.279 \| good
2025-07-30T12:00:00.000Z	77 \| moderate	23.154 \| fine	101.215 \| fine	30.083 \| good	0.573 \| good	4.008 \| good	0.283 \| good
2025-07-30T13:00:00.000Z	75 \| moderate	22.429 \| fine	98.861 \| fine	36.873 \| good	0.626 \| good	3.231 \| good	0.262 \| good
2025-07-30T14:00:00.000Z	77 \| moderate	23.107 \| fine	101.167 \| fine	39.488 \| good	0.678 \| good	2.454 \| good	0.242 \| good
2025-07-30T15:00:00.000Z	73 \| moderate	20.572 \| fine	90.991 \| fine	38.544 \| good	0.73 \| good	1.676 \| good	0.222 \| good
2025-07-30T16:00:00.000Z	67 \| moderate	17.563 \| fine	77.223 \| fine	41.828 \| good	0.612 \| good	1.412 \| good	0.21 \| good
2025-07-30T17:00:00.000Z	71 \| moderate	19.766 \| fine	87.083 \| fine	48.072 \| good	0.494 \| good	1.148 \| good	0.197 \| good
2025-07-30T18:00:00.000Z	67 \| moderate	17.919 \| fine	79.088 \| fine	44.491 \| good	0.376 \| good	0.884 \| good	0.185 \| good
2025-07-30T19:00:00.000Z	64 \| moderate	16.21 \| fine	72.703 \| fine	44.722 \| good	0.342 \| good	0.911 \| good	0.179 \| good
2025-07-30T20:00:00.000Z	62 \| moderate	15.092 \| fine	67.087 \| fine	45.693 \| good	0.308 \| good	0.939 \| good	0.173 \| good
2025-07-30T21:00:00.000Z	58 \| moderate	13.041 \| fine	59.05 \| fine	43.464 \| good	0.274 \| good	0.966 \| good	0.167 \| good
2025-07-30T22:00:00.000Z	58 \| moderate	13.065 \| fine	59.05 \| fine	41.246 \| good	0.32 \| good	2.526 \| good	0.184 \| good
2025-07-30T23:00:00.000Z	60 \| moderate	13.621 \| fine	61.2 \| fine	35.208 \| good	0.366 \| good	4.085 \| good	0.202 \| good
2025-07-31T00:00:00.000Z	71 \| moderate	19.628 \| fine	87.023 \| fine	36.876 \| good	0.412 \| good	5.645 \| good	0.219 \| good
2025-07-31T01:00:00.000Z	71 \| moderate	19.554 \| fine	87.013 \| fine	38.761 \| good	0.456 \| good	6.579 \| good	0.231 \| good
2025-07-31T02:00:00.000Z	71 \| moderate	20.004 \| fine	87.344 \| fine	37.503 \| good	0.5 \| good	7.514 \| good	0.243 \| good
2025-07-31T03:00:00.000Z	73 \| moderate	21.341 \| fine	93.297 \| fine	39.194 \| good	0.544 \| good	8.449 \| good	0.255 \| good
2025-07-31T04:00:00.000Z	71 \| moderate	20.052 \| fine	89.037 \| fine	37.978 \| good	0.544 \| good	9.016 \| good	0.266 \| good
2025-07-31T05:00:00.000Z	71 \| moderate	19.646 \| fine	87.038 \| fine	32.119 \| good	0.543 \| good	9.583 \| good	0.276 \| good
2025-07-31T06:00:00.000Z	69 \| moderate	18.589 \| fine	81.243 \| fine	25.585 \| good	0.543 \| good	10.15 \| good	0.286 \| good
2025-07-31T07:00:00.000Z	71 \| moderate	19.826 \| fine	87.011 \| fine	27.462 \| good	0.529 \| good	7.967 \| good	0.259 \| good
2025-07-31T08:00:00.000Z	71 \| moderate	20.273 \| fine	89.021 \| fine	29.587 \| good	0.516 \| good	5.784 \| good	0.231 \| good
2025-07-31T09:00:00.000Z	84 \| moderate	27.218 \| fine	118.777 \| fine	32.297 \| good	0.502 \| good	3.601 \| good	0.204 \| good
2025-07-31T10:00:00.000Z	96 \| moderate	33.319 \| fine	144.704 \| fine	33.231 \| good	0.47 \| good	3.259 \| good	0.195 \| good
2025-07-31T11:00:00.000Z	112 \| sensitive	39.929 \| moderate	176.463 \| moderate	31.995 \| good	0.437 \| good	2.918 \| good	0.186 \| good
2025-07-31T12:00:00.000Z	94 \| moderate	32.48 \| fine	140.672 \| fine	33.175 \| good	0.405 \| good	2.576 \| good	0.176 \| good
2025-07-31T13:00:00.000Z	73 \| moderate	20.569 \| fine	90.932 \| fine	32.942 \| good	0.415 \| good	2.566 \| good	0.175 \| good
2025-07-31T14:00:00.000Z	64 \| moderate	15.772 \| fine	70.843 \| fine	30.545 \| good	0.425 \| good	2.556 \| good	0.174 \| good
2025-07-31T15:00:00.000Z	62 \| moderate	14.958 \| fine	66.967 \| fine	33.493 \| good	0.436 \| good	2.546 \| good	0.173 \| good
2025-07-31T16:00:00.000Z	60 \| moderate	13.849 \| fine	62.843 \| fine	30.266 \| good	0.459 \| good	2.388 \| good	0.177 \| good

Leicester

Get reliable air quality data to drive your business

Leicester, Massachusetts air quality map: Stay updated on AQI near you

0.30ppm

How accurate is Massachusetts, USA air quality data?

Air quality and pollutant data for Massachusetts, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

Air quality levels in US

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

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

Frequently asked questions

How often is air quality information updated for Leicester, Massachusetts?

The air quality information for Leicester, Massachusetts is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Leicester, Massachusetts at its worst?

In the past 24 hours, the air quality in Leicester, Massachusetts was at its worst at 04:00:00 on 2025-07-29.

When did Leicester, Massachusetts experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Leicester, Massachusetts was observed at 06:00:00 on 2025-07-28.

What is the AQI in Leicester, Massachusetts right now?

As of now, the AQI in Leicester, Massachusetts is 58, indicating Moderate conditions.

What is the most common type of pollution in Leicester, Massachusetts?

Leicester, Massachusetts air has the highest levels of PM2.5.

What should I do in case of poor air quality in Leicester, Massachusetts?

Poor air quality in Leicester, Massachusetts means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Leicester, Massachusetts at the moment?

PM_2.5 levels in Leicester, Massachusetts are currently 13.028 μg/m³.

What is the PM₁₀ level in Leicester, Massachusetts at the moment?

The PM₁₀ concentration in Leicester, Massachusetts is 24.569 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Leicester, Massachusetts at the moment?

The current carbon monoxide (CO) concentration in Leicester, Massachusetts is 0.289 ppm.

What is the sulfur dioxide (SO₂) level in Leicester, Massachusetts at the moment?

Currently, Leicester, Massachusetts has a sulfur dioxide (SO₂) concentration of 0.116 ppb.

What is the ozone (O₃) level in Leicester, Massachusetts at the moment?

The current ozone (O₃) level in Leicester, Massachusetts at the moment is 34.952 ppm.

What is the nitrogen dioxide (NO₂) level in Leicester, Massachusetts at the moment?

Nitrogen dioxide (NO₂) level in Leicester, Massachusetts at the moment is 3.778 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-29T16:00:00.000Z	58 \| moderate	13.028 \| fine	24.569 \| good	34.952 \| good	0.116 \| good	3.778 \| good	0.289 \| good
2025-07-29T17:00:00.000Z	58 \| moderate	12.903 \| fine	30.681 \| good	39.792 \| good	0.22 \| good	3.424 \| good	0.289 \| good
2025-07-29T18:00:00.000Z	56 \| moderate	11.83 \| good	28.362 \| good	42.895 \| good	0.206 \| good	3.932 \| good	0.228 \| good
2025-07-29T19:00:00.000Z	56 \| moderate	11.598 \| good	25.557 \| good	43.299 \| good	0.213 \| good	4.763 \| good	0.279 \| good
2025-07-29T20:00:00.000Z	56 \| moderate	11.865 \| good	27.392 \| good	42.5 \| good	0.327 \| good	2.876 \| good	0.295 \| good
2025-07-29T21:00:00.000Z	54 \| moderate	10.842 \| good	23.986 \| good	42.374 \| good	0.32 \| good	2.725 \| good	0.298 \| good
2025-07-29T22:00:00.000Z	52 \| moderate	10.297 \| good	19.984 \| good	42.63 \| good	0.319 \| good	2.914 \| good	0.29 \| good
2025-07-29T23:00:00.000Z	52 \| moderate	9.983 \| good	23.587 \| good	44.887 \| good	0.275 \| good	3.118 \| good	0.29 \| good
2025-07-30T00:00:00.000Z	49 \| good	9.423 \| good	31.575 \| good	45.619 \| good	0.275 \| good	4.199 \| good	0.246 \| good
2025-07-30T01:00:00.000Z	44 \| good	8.35 \| good	16.552 \| good	43.253 \| good	0.251 \| good	4.268 \| good	0.217 \| good
2025-07-30T02:00:00.000Z	44 \| good	7.894 \| good	19.354 \| good	41.599 \| good	0.129 \| good	6.817 \| good	0.235 \| good
2025-07-30T03:00:00.000Z	64 \| moderate	15.575 \| fine	69.11 \| fine	29.346 \| good	0.543 \| good	6.388 \| good	0.226 \| good
2025-07-30T04:00:00.000Z	52 \| moderate	10.171 \| good	28.225 \| good	35.906 \| good	0.226 \| good	10.596 \| good	0.309 \| good
2025-07-30T05:00:00.000Z	49 \| good	8.686 \| good	27.115 \| good	35.905 \| good	0.363 \| good	14.906 \| good	0.332 \| good
2025-07-30T06:00:00.000Z	52 \| moderate	10.456 \| good	20.906 \| good	35.937 \| good	0.285 \| good	16.034 \| good	0.276 \| good
2025-07-30T07:00:00.000Z	59 \| moderate	10.75 \| good	71.31 \| fine	36.592 \| good	0.235 \| good	9.416 \| good	0.251 \| good
2025-07-30T08:00:00.000Z	49 \| good	8.941 \| good	33.046 \| good	36.575 \| good	0.255 \| good	12.599 \| good	0.257 \| good
2025-07-30T09:00:00.000Z	49 \| good	8.99 \| good	47.88 \| good	33.819 \| good	0.227 \| good	10.909 \| good	0.235 \| good
2025-07-30T10:00:00.000Z	44 \| good	8.43 \| good	22.822 \| good	32.663 \| good	0.174 \| good	8.742 \| good	0.254 \| good
2025-07-30T11:00:00.000Z	44 \| good	8.469 \| good	17.805 \| good	31.779 \| good	0.172 \| good	8.097 \| good	0.325 \| good
2025-07-30T12:00:00.000Z	49 \| good	8.632 \| good	31.281 \| good	28.549 \| good	0.265 \| good	7.48 \| good	0.369 \| good
2025-07-30T13:00:00.000Z	49 \| good	8.594 \| good	31.08 \| good	29.561 \| good	0.195 \| good	6.915 \| good	0.351 \| good
2025-07-30T14:00:00.000Z	49 \| good	9.134 \| good	34.878 \| good	31.374 \| good	0.128 \| good	5.157 \| good	0.289 \| good
2025-07-30T15:00:00.000Z	44 \| good	8.035 \| good	18.37 \| good	35.202 \| good	0.201 \| good	8.093 \| good	0.289 \| good
2025-07-30T16:00:00.000Z	49 \| good	9.455 \| good	46.922 \| good	38.67 \| good	0.249 \| good	6.891 \| good	0.281 \| good
2025-07-30T17:00:00.000Z	53 \| moderate	9.072 \| good	59.873 \| fine	40.36 \| good	0.26 \| good	3.74 \| good	0.277 \| good
2025-07-30T18:00:00.000Z	44 \| good	8.498 \| good	37.404 \| good	39.936 \| good	0.274 \| good	2.782 \| good	0.214 \| good
2025-07-30T19:00:00.000Z	44 \| good	8.332 \| good	22.282 \| good	43.533 \| good	0.258 \| good	2.852 \| good	0.224 \| good
2025-07-30T20:00:00.000Z	44 \| good	7.924 \| good	21.286 \| good	43.602 \| good	0.221 \| good	2.985 \| good	0.224 \| good
2025-07-30T21:00:00.000Z	44 \| good	7.984 \| good	19.178 \| good	44.886 \| good	0.246 \| good	3.384 \| good	0.225 \| good
2025-07-30T22:00:00.000Z	44 \| good	8.098 \| good	22.985 \| good	44 \| good	0.266 \| good	3.514 \| good	0.279 \| good
2025-07-30T23:00:00.000Z	44 \| good	8.011 \| good	29.108 \| good	43.433 \| good	0.268 \| good	3.75 \| good	0.235 \| good
2025-07-31T00:00:00.000Z	44 \| good	7.882 \| good	19.09 \| good	41.206 \| good	0.173 \| good	3.695 \| good	0.235 \| good
2025-07-31T01:00:00.000Z	44 \| good	8.14 \| good	28.618 \| good	39.716 \| good	0.209 \| good	3.942 \| good	0.235 \| good
2025-07-31T02:00:00.000Z	49 \| good	8.529 \| good	32.363 \| good	35.784 \| good	0.232 \| good	6.142 \| good	0.226 \| good
2025-07-31T03:00:00.000Z	44 \| good	8.248 \| good	19.781 \| good	36.282 \| good	0.169 \| good	6.727 \| good	0.226 \| good
2025-07-31T04:00:00.000Z	49 \| good	9.132 \| good	36.32 \| good	35.989 \| good	0.208 \| good	7.195 \| good	0.273 \| good
2025-07-31T05:00:00.000Z	49 \| good	8.726 \| good	28.166 \| good	36.031 \| good	0.426 \| good	10.117 \| good	0.286 \| good
2025-07-31T06:00:00.000Z	58 \| moderate	12.782 \| fine	27.058 \| good	36.037 \| good	0.972 \| good	8.624 \| good	0.31 \| good
2025-07-31T07:00:00.000Z	52 \| moderate	10.107 \| good	39.203 \| good	30.992 \| good	0.178 \| good	10.089 \| good	0.256 \| good
2025-07-31T08:00:00.000Z	54 \| moderate	10.849 \| good	43.585 \| good	30.908 \| good	0.302 \| good	11.369 \| good	0.256 \| good
2025-07-31T09:00:00.000Z	49 \| good	8.811 \| good	23.849 \| good	30.415 \| good	0.285 \| good	11.67 \| good	0.227 \| good
2025-07-31T10:00:00.000Z	52 \| moderate	9.993 \| good	23.9 \| good	30.344 \| good	0.324 \| good	4.685 \| good	0.245 \| good
2025-07-31T11:00:00.000Z	56 \| moderate	11.901 \| good	27.714 \| good	30.012 \| good	0.277 \| good	4.108 \| good	0.307 \| good
2025-07-31T12:00:00.000Z	54 \| moderate	11.25 \| good	38.569 \| good	30.214 \| good	0.39 \| good	4.834 \| good	0.297 \| good
2025-07-31T13:00:00.000Z	56 \| moderate	11.955 \| good	20.844 \| good	30.673 \| good	0.29 \| good	4.254 \| good	0.308 \| good
2025-07-31T14:00:00.000Z	67 \| moderate	17.805 \| fine	65.422 \| fine	27.911 \| good	0.11 \| good	4.372 \| good	0.371 \| good
2025-07-31T15:00:00.000Z	71 \| moderate	19.609 \| fine	42.928 \| good	26.069 \| good	0.102 \| good	3.92 \| good	0.371 \| good
2025-07-31T15:00:00.000Z	67 \| moderate	17.805 \| fine	65.422 \| fine	27.911 \| good	0.11 \| good	4.372 \| good	0.371 \| good
2025-07-29T17:00:00.000Z	69 \| moderate	19.183 \| fine	84.997 \| fine	49.749 \| good	0.568 \| good	0.944 \| good	0.184 \| good
2025-07-29T18:00:00.000Z	67 \| moderate	17.518 \| fine	77.192 \| fine	46.516 \| good	0.498 \| good	0.789 \| good	0.169 \| good
2025-07-29T19:00:00.000Z	64 \| moderate	15.826 \| fine	70.792 \| fine	43.874 \| good	0.464 \| good	0.886 \| good	0.166 \| good
2025-07-29T20:00:00.000Z	64 \| moderate	16.19 \| fine	72.735 \| fine	40.235 \| good	0.43 \| good	0.982 \| good	0.162 \| good
2025-07-29T21:00:00.000Z	58 \| moderate	13.082 \| fine	58.986 \| fine	35.166 \| good	0.396 \| good	1.078 \| good	0.159 \| good
2025-07-29T22:00:00.000Z	56 \| moderate	12.132 \| fine	55.02 \| fine	31.434 \| good	0.408 \| good	2.407 \| good	0.174 \| good
2025-07-29T23:00:00.000Z	58 \| moderate	12.721 \| fine	57.125 \| fine	27.793 \| good	0.419 \| good	3.736 \| good	0.189 \| good
2025-07-30T00:00:00.000Z	58 \| moderate	12.67 \| fine	57.124 \| fine	30.622 \| good	0.43 \| good	5.065 \| good	0.204 \| good
2025-07-30T01:00:00.000Z	60 \| moderate	13.733 \| fine	61.227 \| fine	29.863 \| good	0.448 \| good	5.615 \| good	0.211 \| good
2025-07-30T02:00:00.000Z	62 \| moderate	15.335 \| fine	68.986 \| fine	29.259 \| good	0.465 \| good	6.164 \| good	0.218 \| good
2025-07-30T03:00:00.000Z	62 \| moderate	14.754 \| fine	65.322 \| fine	29.923 \| good	0.482 \| good	6.713 \| good	0.226 \| good
2025-07-30T04:00:00.000Z	64 \| moderate	15.565 \| fine	69.214 \| fine	30.151 \| good	0.469 \| good	7.309 \| good	0.236 \| good
2025-07-30T05:00:00.000Z	75 \| moderate	21.805 \| fine	95.228 \| fine	27.201 \| good	0.455 \| good	7.904 \| good	0.247 \| good
2025-07-30T06:00:00.000Z	79 \| moderate	23.692 \| fine	103.062 \| fine	23.674 \| good	0.441 \| good	8.5 \| good	0.257 \| good
2025-07-30T07:00:00.000Z	81 \| moderate	25.047 \| fine	109.127 \| fine	20.122 \| good	0.446 \| good	8.373 \| good	0.262 \| good
2025-07-30T08:00:00.000Z	81 \| moderate	25.286 \| fine	110.895 \| fine	19.388 \| good	0.45 \| good	8.246 \| good	0.267 \| good
2025-07-30T09:00:00.000Z	90 \| moderate	30.217 \| fine	130.911 \| fine	22.125 \| good	0.454 \| good	8.119 \| good	0.272 \| good
2025-07-30T10:00:00.000Z	84 \| moderate	26.726 \| fine	116.921 \| fine	23.89 \| good	0.494 \| good	6.749 \| good	0.275 \| good
2025-07-30T11:00:00.000Z	86 \| moderate	27.852 \| fine	121.038 \| fine	27.269 \| good	0.534 \| good	5.379 \| good	0.279 \| good
2025-07-30T12:00:00.000Z	77 \| moderate	23.154 \| fine	101.215 \| fine	30.083 \| good	0.573 \| good	4.008 \| good	0.283 \| good
2025-07-30T13:00:00.000Z	75 \| moderate	22.429 \| fine	98.861 \| fine	36.873 \| good	0.626 \| good	3.231 \| good	0.262 \| good
2025-07-30T14:00:00.000Z	77 \| moderate	23.107 \| fine	101.167 \| fine	39.488 \| good	0.678 \| good	2.454 \| good	0.242 \| good
2025-07-30T15:00:00.000Z	73 \| moderate	20.572 \| fine	90.991 \| fine	38.544 \| good	0.73 \| good	1.676 \| good	0.222 \| good
2025-07-30T16:00:00.000Z	67 \| moderate	17.563 \| fine	77.223 \| fine	41.828 \| good	0.612 \| good	1.412 \| good	0.21 \| good
2025-07-30T17:00:00.000Z	71 \| moderate	19.766 \| fine	87.083 \| fine	48.072 \| good	0.494 \| good	1.148 \| good	0.197 \| good
2025-07-30T18:00:00.000Z	67 \| moderate	17.919 \| fine	79.088 \| fine	44.491 \| good	0.376 \| good	0.884 \| good	0.185 \| good
2025-07-30T19:00:00.000Z	64 \| moderate	16.21 \| fine	72.703 \| fine	44.722 \| good	0.342 \| good	0.911 \| good	0.179 \| good
2025-07-30T20:00:00.000Z	62 \| moderate	15.092 \| fine	67.087 \| fine	45.693 \| good	0.308 \| good	0.939 \| good	0.173 \| good
2025-07-30T21:00:00.000Z	58 \| moderate	13.041 \| fine	59.05 \| fine	43.464 \| good	0.274 \| good	0.966 \| good	0.167 \| good
2025-07-30T22:00:00.000Z	58 \| moderate	13.065 \| fine	59.05 \| fine	41.246 \| good	0.32 \| good	2.526 \| good	0.184 \| good
2025-07-30T23:00:00.000Z	60 \| moderate	13.621 \| fine	61.2 \| fine	35.208 \| good	0.366 \| good	4.085 \| good	0.202 \| good
2025-07-31T00:00:00.000Z	71 \| moderate	19.628 \| fine	87.023 \| fine	36.876 \| good	0.412 \| good	5.645 \| good	0.219 \| good
2025-07-31T01:00:00.000Z	71 \| moderate	19.554 \| fine	87.013 \| fine	38.761 \| good	0.456 \| good	6.579 \| good	0.231 \| good
2025-07-31T02:00:00.000Z	71 \| moderate	20.004 \| fine	87.344 \| fine	37.503 \| good	0.5 \| good	7.514 \| good	0.243 \| good
2025-07-31T03:00:00.000Z	73 \| moderate	21.341 \| fine	93.297 \| fine	39.194 \| good	0.544 \| good	8.449 \| good	0.255 \| good
2025-07-31T04:00:00.000Z	71 \| moderate	20.052 \| fine	89.037 \| fine	37.978 \| good	0.544 \| good	9.016 \| good	0.266 \| good
2025-07-31T05:00:00.000Z	71 \| moderate	19.646 \| fine	87.038 \| fine	32.119 \| good	0.543 \| good	9.583 \| good	0.276 \| good
2025-07-31T06:00:00.000Z	69 \| moderate	18.589 \| fine	81.243 \| fine	25.585 \| good	0.543 \| good	10.15 \| good	0.286 \| good
2025-07-31T07:00:00.000Z	71 \| moderate	19.826 \| fine	87.011 \| fine	27.462 \| good	0.529 \| good	7.967 \| good	0.259 \| good
2025-07-31T08:00:00.000Z	71 \| moderate	20.273 \| fine	89.021 \| fine	29.587 \| good	0.516 \| good	5.784 \| good	0.231 \| good
2025-07-31T09:00:00.000Z	84 \| moderate	27.218 \| fine	118.777 \| fine	32.297 \| good	0.502 \| good	3.601 \| good	0.204 \| good
2025-07-31T10:00:00.000Z	96 \| moderate	33.319 \| fine	144.704 \| fine	33.231 \| good	0.47 \| good	3.259 \| good	0.195 \| good
2025-07-31T11:00:00.000Z	112 \| sensitive	39.929 \| moderate	176.463 \| moderate	31.995 \| good	0.437 \| good	2.918 \| good	0.186 \| good
2025-07-31T12:00:00.000Z	94 \| moderate	32.48 \| fine	140.672 \| fine	33.175 \| good	0.405 \| good	2.576 \| good	0.176 \| good
2025-07-31T13:00:00.000Z	73 \| moderate	20.569 \| fine	90.932 \| fine	32.942 \| good	0.415 \| good	2.566 \| good	0.175 \| good
2025-07-31T14:00:00.000Z	64 \| moderate	15.772 \| fine	70.843 \| fine	30.545 \| good	0.425 \| good	2.556 \| good	0.174 \| good
2025-07-31T15:00:00.000Z	62 \| moderate	14.958 \| fine	66.967 \| fine	33.493 \| good	0.436 \| good	2.546 \| good	0.173 \| good
2025-07-31T16:00:00.000Z	60 \| moderate	13.849 \| fine	62.843 \| fine	30.266 \| good	0.459 \| good	2.388 \| good	0.177 \| good

Live air quality index in Leicester, Massachusetts today

Major air pollutants in Leicester, Massachusetts

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Leicester, Massachusetts air quality forecast and history

Get reliable air quality data to drive your business

Leicester, Massachusetts air quality map: Stay updated on AQI near you

Air quality in nearby cities

Spencer, Massachusetts

Auburn, Massachusetts

Worcester, Massachusetts

Holden, Massachusetts

Charlton, Massachusetts

Millbury, Massachusetts

How accurate is Massachusetts, USA air quality data?

Air quality levels in US

Frequently asked questions

How often is air quality information updated for Leicester, Massachusetts?

What time in the last 24 hours was the air quality in Leicester, Massachusetts at its worst?

When did Leicester, Massachusetts experience the best air quality in the last 24 hours?

What is the AQI in Leicester, Massachusetts right now?

What is the most common type of pollution in Leicester, Massachusetts?

What should I do in case of poor air quality in Leicester, Massachusetts?

What is the PM2.5 level in Leicester, Massachusetts at the moment?

What is the PM10 level in Leicester, Massachusetts at the moment?

What is the carbon monoxide (CO) level in Leicester, Massachusetts at the moment?

What is the sulfur dioxide (SO2) level in Leicester, Massachusetts at the moment?

What is the ozone (O3) level in Leicester, Massachusetts at the moment?

What is the nitrogen dioxide (NO2) level in Leicester, Massachusetts at the moment?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in Leicester, Massachusetts at the moment?

What is the PM₁₀ level in Leicester, Massachusetts at the moment?

What is the sulfur dioxide (SO₂) level in Leicester, Massachusetts at the moment?

What is the ozone (O₃) level in Leicester, Massachusetts at the moment?

What is the nitrogen dioxide (NO₂) level in Leicester, Massachusetts at the moment?