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

Currently, Leicester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.484 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 41.059 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 20.671 ppb.

Live air quality index in Leicester, Massachusetts today

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

PM2.5 levels in Leicester, Massachusetts are currently 6.61 μg/m3.

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

The PM10 concentration in Leicester, Massachusetts is 35.879 μg/m3 at the moment.

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)

Good

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)

6.61 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

35.88 μg/m³

155

255

425

605+

Ozone (O₃)

41.06 ppb

201

201+

Sulfur Dioxide (SO₂)

0.48 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

20.67 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 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
2025-12-27T00:00:00.000Z	29 \| good	4.078 \| good	15.904 \| good	30.564 \| good	0.444 \| good	13.931 \| good	0.213 \| good
2025-12-27T01:00:00.000Z	33 \| good	5.932 \| good	24.14 \| good	26.401 \| good	0.432 \| good	11.582 \| good	0.274 \| good
2025-12-27T02:00:00.000Z	27 \| good	4.859 \| good	19.231 \| good	25.067 \| good	0.376 \| good	14.563 \| good	0.212 \| good
2025-12-27T03:00:00.000Z	27 \| good	4.815 \| good	21.9 \| good	25.634 \| good	0.366 \| good	18.41 \| good	0.201 \| good
2025-12-27T04:00:00.000Z	27 \| good	4.509 \| good	18.124 \| good	26.397 \| good	0.392 \| good	13.786 \| good	0.212 \| good
2025-12-27T05:00:00.000Z	27 \| good	4.84 \| good	16.187 \| good	26.147 \| good	0.344 \| good	9.819 \| good	0.187 \| good
2025-12-27T06:00:00.000Z	27 \| good	4.767 \| good	20.362 \| good	26.772 \| good	0.344 \| good	8.527 \| good	0.2 \| good
2025-12-27T07:00:00.000Z	27 \| good	4.857 \| good	15.992 \| good	27.887 \| good	0.344 \| good	7.444 \| good	0.2 \| good
2025-12-27T08:00:00.000Z	27 \| good	4.158 \| good	12.037 \| good	28.603 \| good	0.318 \| good	7.141 \| good	0.2 \| good
2025-12-27T09:00:00.000Z	27 \| good	5.021 \| good	22.773 \| good	26.407 \| good	0.388 \| good	11.716 \| good	0.189 \| good
2025-12-27T10:00:00.000Z	24 \| good	4.383 \| good	10.973 \| good	25.586 \| good	0.36 \| good	10.522 \| good	0.24 \| good
2025-12-27T11:00:00.000Z	29 \| good	4.182 \| good	10.669 \| good	30.558 \| good	0.326 \| good	4.553 \| good	0.189 \| good
2025-12-27T12:00:00.000Z	29 \| good	3.943 \| good	6.419 \| good	30.775 \| good	0.314 \| good	4.296 \| good	0.189 \| good
2025-12-27T13:00:00.000Z	30 \| good	3.927 \| good	10.08 \| good	31.723 \| good	0.356 \| good	3.711 \| good	0.189 \| good
2025-12-27T14:00:00.000Z	29 \| good	3.683 \| good	10.286 \| good	30.777 \| good	0.357 \| good	3.91 \| good	0.305 \| good
2025-12-27T15:00:00.000Z	31 \| good	3.137 \| good	6.226 \| good	33.521 \| good	0.356 \| good	3.643 \| good	0.305 \| good
2025-12-27T16:00:00.000Z	29 \| good	2.778 \| good	7.457 \| good	31.206 \| good	0.309 \| good	3.216 \| good	0.226 \| good
2025-12-27T17:00:00.000Z	31 \| good	2.994 \| good	7.753 \| good	34.139 \| good	0.309 \| good	3.568 \| good	0.278 \| good
2025-12-27T18:00:00.000Z	31 \| good	2.788 \| good	6.128 \| good	33.919 \| good	0.364 \| good	3.816 \| good	0.215 \| good
2025-12-27T19:00:00.000Z	31 \| good	2.856 \| good	4.302 \| good	33.325 \| good	0.363 \| good	4.317 \| good	0.215 \| good
2025-12-27T20:00:00.000Z	33 \| good	2.845 \| good	7.103 \| good	35.55 \| good	0.361 \| good	5.235 \| good	0.229 \| good
2025-12-27T21:00:00.000Z	32 \| good	3.302 \| good	7.467 \| good	34.543 \| good	0.346 \| good	3.484 \| good	0.293 \| good
2025-12-27T22:00:00.000Z	31 \| good	3.203 \| good	6.279 \| good	33.555 \| good	0.342 \| good	8.73 \| good	0.355 \| good
2025-12-27T23:00:00.000Z	31 \| good	3.754 \| good	8.065 \| good	34.311 \| good	0.386 \| good	20.101 \| good	0.342 \| good
2025-12-28T00:00:00.000Z	31 \| good	4.7 \| good	21.327 \| good	34.113 \| good	0.4 \| good	14.863 \| good	0.441 \| good
2025-12-28T01:00:00.000Z	31 \| good	4.458 \| good	10.525 \| good	33.117 \| good	0.467 \| good	10.017 \| good	0.552 \| good
2025-12-28T02:00:00.000Z	31 \| good	4.298 \| good	16.392 \| good	33.346 \| good	0.513 \| good	13.268 \| good	0.481 \| good
2025-12-28T03:00:00.000Z	33 \| good	5.717 \| good	25.232 \| good	28.859 \| good	0.624 \| good	9.185 \| good	0.216 \| good
2025-12-28T04:00:00.000Z	33 \| good	5.963 \| good	22.992 \| good	35.072 \| good	0.522 \| good	10.051 \| good	0.43 \| good
2025-12-28T05:00:00.000Z	44 \| good	7.847 \| good	20.38 \| good	31.403 \| good	0.466 \| good	19.548 \| good	0.418 \| good
2025-12-28T06:00:00.000Z	49 \| good	9.062 \| good	23.397 \| good	29.18 \| good	0.447 \| good	20.587 \| good	0.357 \| good
2025-12-28T07:00:00.000Z	44 \| good	7.979 \| good	20.276 \| good	31.313 \| good	0.437 \| good	21.949 \| good	0.332 \| good
2025-12-28T08:00:00.000Z	44 \| good	7.524 \| good	22.065 \| good	31.931 \| good	0.39 \| good	25.421 \| good	0.308 \| good
2025-12-28T09:00:00.000Z	54 \| moderate	11.057 \| good	52.56 \| good	30.999 \| good	0.664 \| good	24.094 \| good	0.432 \| good
2025-12-28T10:00:00.000Z	52 \| moderate	9.914 \| good	39.079 \| good	33.336 \| good	0.813 \| good	26.556 \| good	0.46 \| good
2025-12-28T11:00:00.000Z	54 \| moderate	10.747 \| good	25.881 \| good	27.12 \| good	0.54 \| good	19.018 \| good	0.464 \| good
2025-12-28T12:00:00.000Z	54 \| moderate	10.76 \| good	21.727 \| good	33.891 \| good	0.627 \| good	22.953 \| good	0.437 \| good
2025-12-28T13:00:00.000Z	49 \| good	9.107 \| good	27.499 \| good	32.84 \| good	0.628 \| good	25.576 \| good	0.418 \| good
2025-12-28T14:00:00.000Z	33 \| good	6.391 \| good	19.212 \| good	27.345 \| good	0.739 \| good	30.429 \| good	0.536 \| good
2025-12-28T15:00:00.000Z	31 \| good	5.163 \| good	15.391 \| good	33.951 \| good	0.377 \| good	12.838 \| good	0.351 \| good
2025-12-28T16:00:00.000Z	27 \| good	5.419 \| good	10.004 \| good	25.867 \| good	0.476 \| good	16.602 \| good	0.276 \| good
2025-12-28T17:00:00.000Z	34 \| good	5.908 \| good	13.757 \| good	37.313 \| good	0.425 \| good	9.899 \| good	0.238 \| good
2025-12-28T18:00:00.000Z	35 \| good	4.458 \| good	7.967 \| good	38.075 \| good	0.425 \| good	7.117 \| good	0.225 \| good
2025-12-28T19:00:00.000Z	38 \| good	5.546 \| good	40.614 \| good	40.225 \| good	0.413 \| good	8.687 \| good	0.247 \| good
2025-12-28T20:00:00.000Z	36 \| good	5.509 \| good	26.282 \| good	38.556 \| good	0.399 \| good	12.356 \| good	0.27 \| good
2025-12-28T21:00:00.000Z	35 \| good	4.855 \| good	17.389 \| good	37.647 \| good	0.399 \| good	12.825 \| good	0.274 \| good
2025-12-28T22:00:00.000Z	38 \| good	7.046 \| good	39 \| good	36.899 \| good	0.437 \| good	20.043 \| good	0.361 \| good
2025-12-28T23:00:00.000Z	38 \| good	6.61 \| good	35.879 \| good	41.059 \| good	0.484 \| good	20.671 \| good	0.328 \| good
2025-12-29T00:00:00.000Z	54 \| moderate	11.171 \| good	49.47 \| good	24.548 \| good	1.229 \| good	15.312 \| good	0.264 \| good
2025-12-29T01:00:00.000Z	52 \| moderate	10.19 \| good	45.391 \| good	22.027 \| good	1.595 \| good	17.409 \| good	0.262 \| good
2025-12-29T02:00:00.000Z	64 \| moderate	15.64 \| fine	69.779 \| fine	12.117 \| good	1.961 \| good	19.506 \| good	0.26 \| good
2025-12-29T03:00:00.000Z	66 \| moderate	16.966 \| fine	75.801 \| fine	11.321 \| good	2.327 \| good	21.603 \| good	0.257 \| good
2025-12-29T04:00:00.000Z	62 \| moderate	15.205 \| fine	67.96 \| fine	14.611 \| good	1.915 \| good	19.13 \| good	0.24 \| good
2025-12-29T05:00:00.000Z	54 \| moderate	10.781 \| good	47.653 \| good	21.065 \| good	1.503 \| good	16.658 \| good	0.223 \| good
2025-12-29T06:00:00.000Z	33 \| good	6.033 \| good	26.489 \| good	24.869 \| good	1.091 \| good	14.185 \| good	0.205 \| good
2025-12-29T07:00:00.000Z	29 \| good	2.244 \| good	9.213 \| good	30.583 \| good	0.82 \| good	9.995 \| good	0.182 \| good
2025-12-29T08:00:00.000Z	32 \| good	1.257 \| good	5 \| good	35.464 \| good	0.55 \| good	5.805 \| good	0.159 \| good
2025-12-29T09:00:00.000Z	32 \| good	1.396 \| good	5.401 \| good	35.42 \| good	0.279 \| good	1.615 \| good	0.136 \| good
2025-12-29T10:00:00.000Z	31 \| good	1.992 \| good	8.067 \| good	33.504 \| good	0.374 \| good	2.197 \| good	0.141 \| good
2025-12-29T11:00:00.000Z	30 \| good	2.306 \| good	9.656 \| good	31.856 \| good	0.468 \| good	2.778 \| good	0.145 \| good
2025-12-29T12:00:00.000Z	28 \| good	2.441 \| good	9.966 \| good	30.108 \| good	0.563 \| good	3.36 \| good	0.15 \| good
2025-12-29T13:00:00.000Z	27 \| good	3.081 \| good	13.007 \| good	28.763 \| good	0.748 \| good	4.28 \| good	0.16 \| good
2025-12-29T14:00:00.000Z	27 \| good	3.054 \| good	12.98 \| good	29.193 \| good	0.933 \| good	5.199 \| good	0.17 \| good
2025-12-29T15:00:00.000Z	27 \| good	3.823 \| good	16.63 \| good	28.518 \| good	1.119 \| good	6.119 \| good	0.18 \| good
2025-12-29T16:00:00.000Z	27 \| good	4.639 \| good	20.451 \| good	27.129 \| good	1.067 \| good	6.595 \| good	0.182 \| good
2025-12-29T17:00:00.000Z	33 \| good	5.631 \| good	24 \| good	24.199 \| good	1.016 \| good	7.071 \| good	0.184 \| good
2025-12-29T18:00:00.000Z	38 \| good	6.862 \| good	30.362 \| good	20.401 \| good	0.964 \| good	7.547 \| good	0.186 \| good
2025-12-29T19:00:00.000Z	33 \| good	5.683 \| good	24.745 \| good	24.383 \| good	1.164 \| good	8.701 \| good	0.193 \| good
2025-12-29T20:00:00.000Z	34 \| good	2.4 \| good	9.91 \| good	37.339 \| good	1.364 \| good	9.855 \| good	0.199 \| good
2025-12-29T21:00:00.000Z	35 \| good	1.081 \| good	4.233 \| good	38.15 \| good	1.563 \| good	11.008 \| good	0.205 \| good
2025-12-29T22:00:00.000Z	34 \| good	1.889 \| good	8 \| good	37.327 \| good	1.429 \| good	8.401 \| good	0.192 \| good
2025-12-29T23:00:00.000Z	30 \| good	5.374 \| good	23.034 \| good	31.967 \| good	1.294 \| good	5.793 \| good	0.179 \| good
2025-12-30T00:00:00.000Z	33 \| good	6.066 \| good	26.741 \| good	27.295 \| good	1.159 \| good	3.185 \| good	0.166 \| good
2025-12-30T01:00:00.000Z	22 \| good	3.722 \| good	16.073 \| good	23.889 \| good	0.913 \| good	2.798 \| good	0.166 \| good
2025-12-30T02:00:00.000Z	20 \| good	2.281 \| good	9.192 \| good	22.262 \| good	0.668 \| good	2.411 \| good	0.166 \| good
2025-12-30T03:00:00.000Z	20 \| good	2.02 \| good	8.163 \| good	22.346 \| good	0.423 \| good	2.023 \| good	0.165 \| good
2025-12-30T04:00:00.000Z	24 \| good	1.381 \| good	5.243 \| good	26.25 \| good	0.387 \| good	1.788 \| good	0.159 \| good
2025-12-30T05:00:00.000Z	28 \| good	0.745 \| good	3.034 \| good	30.037 \| good	0.352 \| good	1.553 \| good	0.153 \| good
2025-12-30T06:00:00.000Z	29 \| good	0.445 \| good	2 \| good	31.131 \| good	0.316 \| good	1.318 \| good	0.146 \| good
2025-12-30T07:00:00.000Z	30 \| good	0.268 \| good	1 \| good	31.936 \| good	0.303 \| good	1.194 \| good	0.143 \| good
2025-12-30T08:00:00.000Z	30 \| good	0.195 \| good	0.541 \| good	31.747 \| good	0.289 \| good	1.071 \| good	0.141 \| good
2025-12-30T09:00:00.000Z	31 \| good	0.125 \| good	0.09 \| good	32.528 \| good	0.275 \| good	0.947 \| good	0.138 \| good
2025-12-30T10:00:00.000Z	31 \| good	0.248 \| good	0.791 \| good	32.835 \| good	0.282 \| good	1.131 \| good	0.139 \| good
2025-12-30T11:00:00.000Z	31 \| good	0.465 \| good	1.932 \| good	33.48 \| good	0.289 \| good	1.315 \| good	0.141 \| good
2025-12-30T12:00:00.000Z	31 \| good	0.409 \| good	1.527 \| good	32.762 \| good	0.295 \| good	1.499 \| good	0.143 \| good
2025-12-30T13:00:00.000Z	30 \| good	0.187 \| good	0.695 \| good	32.025 \| good	0.271 \| good	1.333 \| good	0.14 \| good
2025-12-30T14:00:00.000Z	30 \| good	0.422 \| good	1.849 \| good	32.149 \| good	0.246 \| good	1.167 \| good	0.138 \| good
2025-12-30T15:00:00.000Z	31 \| good	0.35 \| good	1.199 \| good	33.14 \| good	0.221 \| good	1.001 \| good	0.136 \| good
2025-12-30T16:00:00.000Z	32 \| good	0.037 \| good	0 \| good	34.789 \| good	0.218 \| good	0.971 \| good	0.135 \| good
2025-12-30T17:00:00.000Z	32 \| good	0.184 \| good	0.439 \| good	35.128 \| good	0.214 \| good	0.942 \| good	0.134 \| good
2025-12-30T18:00:00.000Z	33 \| good	0.261 \| good	1 \| good	35.754 \| good	0.21 \| good	0.913 \| good	0.134 \| good
2025-12-30T19:00:00.000Z	34 \| good	0.848 \| good	3.4 \| good	36.652 \| good	0.221 \| good	1.128 \| good	0.134 \| good
2025-12-30T20:00:00.000Z	33 \| good	0.979 \| good	3.778 \| good	36.483 \| good	0.232 \| good	1.343 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	34 \| good	0.575 \| good	2.067 \| good	36.851 \| good	0.244 \| good	1.558 \| good	0.135 \| good
2025-12-30T22:00:00.000Z	33 \| good	0.718 \| good	2.762 \| good	36.288 \| good	0.303 \| good	1.725 \| good	0.135 \| good
2025-12-30T23:00:00.000Z	33 \| good	0.225 \| good	0.541 \| good	36.283 \| good	0.363 \| good	1.892 \| good	0.136 \| good

Leicester

Get reliable air quality data to drive your business

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

0.32ppm

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

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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 12:00:00 on 2025-12-28.

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 04:00:00 on 2025-12-28.

What is the AQI in Leicester, Massachusetts right now?

As of now, the AQI in Leicester, Massachusetts is 38, indicating Good conditions.

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

Leicester, Massachusetts air has the highest levels of O3.

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 6.61 μg/m³.

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

The PM₁₀ concentration in Leicester, Massachusetts is 35.879 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 0.328 ppm.

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

Currently, Leicester, Massachusetts has a sulfur dioxide (SO₂) concentration of 0.484 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 41.059 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 20.671 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	29 \| good	4.078 \| good	15.904 \| good	30.564 \| good	0.444 \| good	13.931 \| good	0.213 \| good
2025-12-27T01:00:00.000Z	33 \| good	5.932 \| good	24.14 \| good	26.401 \| good	0.432 \| good	11.582 \| good	0.274 \| good
2025-12-27T02:00:00.000Z	27 \| good	4.859 \| good	19.231 \| good	25.067 \| good	0.376 \| good	14.563 \| good	0.212 \| good
2025-12-27T03:00:00.000Z	27 \| good	4.815 \| good	21.9 \| good	25.634 \| good	0.366 \| good	18.41 \| good	0.201 \| good
2025-12-27T04:00:00.000Z	27 \| good	4.509 \| good	18.124 \| good	26.397 \| good	0.392 \| good	13.786 \| good	0.212 \| good
2025-12-27T05:00:00.000Z	27 \| good	4.84 \| good	16.187 \| good	26.147 \| good	0.344 \| good	9.819 \| good	0.187 \| good
2025-12-27T06:00:00.000Z	27 \| good	4.767 \| good	20.362 \| good	26.772 \| good	0.344 \| good	8.527 \| good	0.2 \| good
2025-12-27T07:00:00.000Z	27 \| good	4.857 \| good	15.992 \| good	27.887 \| good	0.344 \| good	7.444 \| good	0.2 \| good
2025-12-27T08:00:00.000Z	27 \| good	4.158 \| good	12.037 \| good	28.603 \| good	0.318 \| good	7.141 \| good	0.2 \| good
2025-12-27T09:00:00.000Z	27 \| good	5.021 \| good	22.773 \| good	26.407 \| good	0.388 \| good	11.716 \| good	0.189 \| good
2025-12-27T10:00:00.000Z	24 \| good	4.383 \| good	10.973 \| good	25.586 \| good	0.36 \| good	10.522 \| good	0.24 \| good
2025-12-27T11:00:00.000Z	29 \| good	4.182 \| good	10.669 \| good	30.558 \| good	0.326 \| good	4.553 \| good	0.189 \| good
2025-12-27T12:00:00.000Z	29 \| good	3.943 \| good	6.419 \| good	30.775 \| good	0.314 \| good	4.296 \| good	0.189 \| good
2025-12-27T13:00:00.000Z	30 \| good	3.927 \| good	10.08 \| good	31.723 \| good	0.356 \| good	3.711 \| good	0.189 \| good
2025-12-27T14:00:00.000Z	29 \| good	3.683 \| good	10.286 \| good	30.777 \| good	0.357 \| good	3.91 \| good	0.305 \| good
2025-12-27T15:00:00.000Z	31 \| good	3.137 \| good	6.226 \| good	33.521 \| good	0.356 \| good	3.643 \| good	0.305 \| good
2025-12-27T16:00:00.000Z	29 \| good	2.778 \| good	7.457 \| good	31.206 \| good	0.309 \| good	3.216 \| good	0.226 \| good
2025-12-27T17:00:00.000Z	31 \| good	2.994 \| good	7.753 \| good	34.139 \| good	0.309 \| good	3.568 \| good	0.278 \| good
2025-12-27T18:00:00.000Z	31 \| good	2.788 \| good	6.128 \| good	33.919 \| good	0.364 \| good	3.816 \| good	0.215 \| good
2025-12-27T19:00:00.000Z	31 \| good	2.856 \| good	4.302 \| good	33.325 \| good	0.363 \| good	4.317 \| good	0.215 \| good
2025-12-27T20:00:00.000Z	33 \| good	2.845 \| good	7.103 \| good	35.55 \| good	0.361 \| good	5.235 \| good	0.229 \| good
2025-12-27T21:00:00.000Z	32 \| good	3.302 \| good	7.467 \| good	34.543 \| good	0.346 \| good	3.484 \| good	0.293 \| good
2025-12-27T22:00:00.000Z	31 \| good	3.203 \| good	6.279 \| good	33.555 \| good	0.342 \| good	8.73 \| good	0.355 \| good
2025-12-27T23:00:00.000Z	31 \| good	3.754 \| good	8.065 \| good	34.311 \| good	0.386 \| good	20.101 \| good	0.342 \| good
2025-12-28T00:00:00.000Z	31 \| good	4.7 \| good	21.327 \| good	34.113 \| good	0.4 \| good	14.863 \| good	0.441 \| good
2025-12-28T01:00:00.000Z	31 \| good	4.458 \| good	10.525 \| good	33.117 \| good	0.467 \| good	10.017 \| good	0.552 \| good
2025-12-28T02:00:00.000Z	31 \| good	4.298 \| good	16.392 \| good	33.346 \| good	0.513 \| good	13.268 \| good	0.481 \| good
2025-12-28T03:00:00.000Z	33 \| good	5.717 \| good	25.232 \| good	28.859 \| good	0.624 \| good	9.185 \| good	0.216 \| good
2025-12-28T04:00:00.000Z	33 \| good	5.963 \| good	22.992 \| good	35.072 \| good	0.522 \| good	10.051 \| good	0.43 \| good
2025-12-28T05:00:00.000Z	44 \| good	7.847 \| good	20.38 \| good	31.403 \| good	0.466 \| good	19.548 \| good	0.418 \| good
2025-12-28T06:00:00.000Z	49 \| good	9.062 \| good	23.397 \| good	29.18 \| good	0.447 \| good	20.587 \| good	0.357 \| good
2025-12-28T07:00:00.000Z	44 \| good	7.979 \| good	20.276 \| good	31.313 \| good	0.437 \| good	21.949 \| good	0.332 \| good
2025-12-28T08:00:00.000Z	44 \| good	7.524 \| good	22.065 \| good	31.931 \| good	0.39 \| good	25.421 \| good	0.308 \| good
2025-12-28T09:00:00.000Z	54 \| moderate	11.057 \| good	52.56 \| good	30.999 \| good	0.664 \| good	24.094 \| good	0.432 \| good
2025-12-28T10:00:00.000Z	52 \| moderate	9.914 \| good	39.079 \| good	33.336 \| good	0.813 \| good	26.556 \| good	0.46 \| good
2025-12-28T11:00:00.000Z	54 \| moderate	10.747 \| good	25.881 \| good	27.12 \| good	0.54 \| good	19.018 \| good	0.464 \| good
2025-12-28T12:00:00.000Z	54 \| moderate	10.76 \| good	21.727 \| good	33.891 \| good	0.627 \| good	22.953 \| good	0.437 \| good
2025-12-28T13:00:00.000Z	49 \| good	9.107 \| good	27.499 \| good	32.84 \| good	0.628 \| good	25.576 \| good	0.418 \| good
2025-12-28T14:00:00.000Z	33 \| good	6.391 \| good	19.212 \| good	27.345 \| good	0.739 \| good	30.429 \| good	0.536 \| good
2025-12-28T15:00:00.000Z	31 \| good	5.163 \| good	15.391 \| good	33.951 \| good	0.377 \| good	12.838 \| good	0.351 \| good
2025-12-28T16:00:00.000Z	27 \| good	5.419 \| good	10.004 \| good	25.867 \| good	0.476 \| good	16.602 \| good	0.276 \| good
2025-12-28T17:00:00.000Z	34 \| good	5.908 \| good	13.757 \| good	37.313 \| good	0.425 \| good	9.899 \| good	0.238 \| good
2025-12-28T18:00:00.000Z	35 \| good	4.458 \| good	7.967 \| good	38.075 \| good	0.425 \| good	7.117 \| good	0.225 \| good
2025-12-28T19:00:00.000Z	38 \| good	5.546 \| good	40.614 \| good	40.225 \| good	0.413 \| good	8.687 \| good	0.247 \| good
2025-12-28T20:00:00.000Z	36 \| good	5.509 \| good	26.282 \| good	38.556 \| good	0.399 \| good	12.356 \| good	0.27 \| good
2025-12-28T21:00:00.000Z	35 \| good	4.855 \| good	17.389 \| good	37.647 \| good	0.399 \| good	12.825 \| good	0.274 \| good
2025-12-28T22:00:00.000Z	38 \| good	7.046 \| good	39 \| good	36.899 \| good	0.437 \| good	20.043 \| good	0.361 \| good
2025-12-28T23:00:00.000Z	38 \| good	6.61 \| good	35.879 \| good	41.059 \| good	0.484 \| good	20.671 \| good	0.328 \| good
2025-12-29T00:00:00.000Z	54 \| moderate	11.171 \| good	49.47 \| good	24.548 \| good	1.229 \| good	15.312 \| good	0.264 \| good
2025-12-29T01:00:00.000Z	52 \| moderate	10.19 \| good	45.391 \| good	22.027 \| good	1.595 \| good	17.409 \| good	0.262 \| good
2025-12-29T02:00:00.000Z	64 \| moderate	15.64 \| fine	69.779 \| fine	12.117 \| good	1.961 \| good	19.506 \| good	0.26 \| good
2025-12-29T03:00:00.000Z	66 \| moderate	16.966 \| fine	75.801 \| fine	11.321 \| good	2.327 \| good	21.603 \| good	0.257 \| good
2025-12-29T04:00:00.000Z	62 \| moderate	15.205 \| fine	67.96 \| fine	14.611 \| good	1.915 \| good	19.13 \| good	0.24 \| good
2025-12-29T05:00:00.000Z	54 \| moderate	10.781 \| good	47.653 \| good	21.065 \| good	1.503 \| good	16.658 \| good	0.223 \| good
2025-12-29T06:00:00.000Z	33 \| good	6.033 \| good	26.489 \| good	24.869 \| good	1.091 \| good	14.185 \| good	0.205 \| good
2025-12-29T07:00:00.000Z	29 \| good	2.244 \| good	9.213 \| good	30.583 \| good	0.82 \| good	9.995 \| good	0.182 \| good
2025-12-29T08:00:00.000Z	32 \| good	1.257 \| good	5 \| good	35.464 \| good	0.55 \| good	5.805 \| good	0.159 \| good
2025-12-29T09:00:00.000Z	32 \| good	1.396 \| good	5.401 \| good	35.42 \| good	0.279 \| good	1.615 \| good	0.136 \| good
2025-12-29T10:00:00.000Z	31 \| good	1.992 \| good	8.067 \| good	33.504 \| good	0.374 \| good	2.197 \| good	0.141 \| good
2025-12-29T11:00:00.000Z	30 \| good	2.306 \| good	9.656 \| good	31.856 \| good	0.468 \| good	2.778 \| good	0.145 \| good
2025-12-29T12:00:00.000Z	28 \| good	2.441 \| good	9.966 \| good	30.108 \| good	0.563 \| good	3.36 \| good	0.15 \| good
2025-12-29T13:00:00.000Z	27 \| good	3.081 \| good	13.007 \| good	28.763 \| good	0.748 \| good	4.28 \| good	0.16 \| good
2025-12-29T14:00:00.000Z	27 \| good	3.054 \| good	12.98 \| good	29.193 \| good	0.933 \| good	5.199 \| good	0.17 \| good
2025-12-29T15:00:00.000Z	27 \| good	3.823 \| good	16.63 \| good	28.518 \| good	1.119 \| good	6.119 \| good	0.18 \| good
2025-12-29T16:00:00.000Z	27 \| good	4.639 \| good	20.451 \| good	27.129 \| good	1.067 \| good	6.595 \| good	0.182 \| good
2025-12-29T17:00:00.000Z	33 \| good	5.631 \| good	24 \| good	24.199 \| good	1.016 \| good	7.071 \| good	0.184 \| good
2025-12-29T18:00:00.000Z	38 \| good	6.862 \| good	30.362 \| good	20.401 \| good	0.964 \| good	7.547 \| good	0.186 \| good
2025-12-29T19:00:00.000Z	33 \| good	5.683 \| good	24.745 \| good	24.383 \| good	1.164 \| good	8.701 \| good	0.193 \| good
2025-12-29T20:00:00.000Z	34 \| good	2.4 \| good	9.91 \| good	37.339 \| good	1.364 \| good	9.855 \| good	0.199 \| good
2025-12-29T21:00:00.000Z	35 \| good	1.081 \| good	4.233 \| good	38.15 \| good	1.563 \| good	11.008 \| good	0.205 \| good
2025-12-29T22:00:00.000Z	34 \| good	1.889 \| good	8 \| good	37.327 \| good	1.429 \| good	8.401 \| good	0.192 \| good
2025-12-29T23:00:00.000Z	30 \| good	5.374 \| good	23.034 \| good	31.967 \| good	1.294 \| good	5.793 \| good	0.179 \| good
2025-12-30T00:00:00.000Z	33 \| good	6.066 \| good	26.741 \| good	27.295 \| good	1.159 \| good	3.185 \| good	0.166 \| good
2025-12-30T01:00:00.000Z	22 \| good	3.722 \| good	16.073 \| good	23.889 \| good	0.913 \| good	2.798 \| good	0.166 \| good
2025-12-30T02:00:00.000Z	20 \| good	2.281 \| good	9.192 \| good	22.262 \| good	0.668 \| good	2.411 \| good	0.166 \| good
2025-12-30T03:00:00.000Z	20 \| good	2.02 \| good	8.163 \| good	22.346 \| good	0.423 \| good	2.023 \| good	0.165 \| good
2025-12-30T04:00:00.000Z	24 \| good	1.381 \| good	5.243 \| good	26.25 \| good	0.387 \| good	1.788 \| good	0.159 \| good
2025-12-30T05:00:00.000Z	28 \| good	0.745 \| good	3.034 \| good	30.037 \| good	0.352 \| good	1.553 \| good	0.153 \| good
2025-12-30T06:00:00.000Z	29 \| good	0.445 \| good	2 \| good	31.131 \| good	0.316 \| good	1.318 \| good	0.146 \| good
2025-12-30T07:00:00.000Z	30 \| good	0.268 \| good	1 \| good	31.936 \| good	0.303 \| good	1.194 \| good	0.143 \| good
2025-12-30T08:00:00.000Z	30 \| good	0.195 \| good	0.541 \| good	31.747 \| good	0.289 \| good	1.071 \| good	0.141 \| good
2025-12-30T09:00:00.000Z	31 \| good	0.125 \| good	0.09 \| good	32.528 \| good	0.275 \| good	0.947 \| good	0.138 \| good
2025-12-30T10:00:00.000Z	31 \| good	0.248 \| good	0.791 \| good	32.835 \| good	0.282 \| good	1.131 \| good	0.139 \| good
2025-12-30T11:00:00.000Z	31 \| good	0.465 \| good	1.932 \| good	33.48 \| good	0.289 \| good	1.315 \| good	0.141 \| good
2025-12-30T12:00:00.000Z	31 \| good	0.409 \| good	1.527 \| good	32.762 \| good	0.295 \| good	1.499 \| good	0.143 \| good
2025-12-30T13:00:00.000Z	30 \| good	0.187 \| good	0.695 \| good	32.025 \| good	0.271 \| good	1.333 \| good	0.14 \| good
2025-12-30T14:00:00.000Z	30 \| good	0.422 \| good	1.849 \| good	32.149 \| good	0.246 \| good	1.167 \| good	0.138 \| good
2025-12-30T15:00:00.000Z	31 \| good	0.35 \| good	1.199 \| good	33.14 \| good	0.221 \| good	1.001 \| good	0.136 \| good
2025-12-30T16:00:00.000Z	32 \| good	0.037 \| good	0 \| good	34.789 \| good	0.218 \| good	0.971 \| good	0.135 \| good
2025-12-30T17:00:00.000Z	32 \| good	0.184 \| good	0.439 \| good	35.128 \| good	0.214 \| good	0.942 \| good	0.134 \| good
2025-12-30T18:00:00.000Z	33 \| good	0.261 \| good	1 \| good	35.754 \| good	0.21 \| good	0.913 \| good	0.134 \| good
2025-12-30T19:00:00.000Z	34 \| good	0.848 \| good	3.4 \| good	36.652 \| good	0.221 \| good	1.128 \| good	0.134 \| good
2025-12-30T20:00:00.000Z	33 \| good	0.979 \| good	3.778 \| good	36.483 \| good	0.232 \| good	1.343 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	34 \| good	0.575 \| good	2.067 \| good	36.851 \| good	0.244 \| good	1.558 \| good	0.135 \| good
2025-12-30T22:00:00.000Z	33 \| good	0.718 \| good	2.762 \| good	36.288 \| good	0.303 \| good	1.725 \| good	0.135 \| good
2025-12-30T23:00:00.000Z	33 \| good	0.225 \| good	0.541 \| good	36.283 \| good	0.363 \| good	1.892 \| good	0.136 \| 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

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Auburn, Massachusetts

Worcester, Massachusetts

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Frequently asked questions

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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?