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

Currently, Leicester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.269 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 32.1 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 4.487 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 11.718 μg/m3.

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

The PM10 concentration in Leicester, Massachusetts is 31.936 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)

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)

11.72 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

31.94 μg/m³

155

255

425

605+

Ozone (O₃)

32.10 ppb

201

201+

Sulfur Dioxide (SO₂)

0.27 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.49 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 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
2026-07-09T13:00:00.000Z	38 \| good	6.807 \| good	19.963 \| good	38.207 \| good	0.433 \| good	7.066 \| good	0.288 \| good
2026-07-09T14:00:00.000Z	52 \| moderate	7.816 \| good	57.203 \| fine	37.621 \| good	0.239 \| good	3.892 \| good	0.226 \| good
2026-07-09T15:00:00.000Z	36 \| good	5.605 \| good	30.066 \| good	39.392 \| good	0.217 \| good	3.089 \| good	0.2 \| good
2026-07-09T16:00:00.000Z	36 \| good	5.723 \| good	24.284 \| good	38.507 \| good	0.226 \| good	2.735 \| good	0.2 \| good
2026-07-09T17:00:00.000Z	37 \| good	4.458 \| good	20.269 \| good	40.013 \| good	0.416 \| good	2.082 \| good	0.2 \| good
2026-07-09T18:00:00.000Z	39 \| good	5.245 \| good	21.255 \| good	41.592 \| good	0.45 \| good	3.596 \| good	0.301 \| good
2026-07-09T19:00:00.000Z	37 \| good	4.272 \| good	15.228 \| good	40.426 \| good	0.435 \| good	2.554 \| good	0.188 \| good
2026-07-09T20:00:00.000Z	42 \| good	4.598 \| good	13.288 \| good	45.185 \| good	0.235 \| good	3.128 \| good	0.378 \| good
2026-07-09T21:00:00.000Z	45 \| good	4.952 \| good	18.882 \| good	48.786 \| good	0.291 \| good	4.38 \| good	0.262 \| good
2026-07-09T22:00:00.000Z	47 \| good	5.731 \| good	16.291 \| good	51.397 \| good	0.236 \| good	3.701 \| good	0.262 \| good
2026-07-09T23:00:00.000Z	54 \| moderate	7.546 \| good	29.853 \| good	56.136 \| fine	0.235 \| good	6.32 \| good	0.273 \| good
2026-07-10T00:00:00.000Z	84 \| moderate	7.513 \| good	17.634 \| good	65.311 \| fine	0.236 \| good	5.314 \| good	0.29 \| good
2026-07-10T01:00:00.000Z	84 \| moderate	7.543 \| good	16.739 \| good	64.954 \| fine	0.236 \| good	5.14 \| good	0.27 \| good
2026-07-10T02:00:00.000Z	84 \| moderate	7.299 \| good	20.646 \| good	64.861 \| fine	0.244 \| good	4.059 \| good	0.218 \| good
2026-07-10T03:00:00.000Z	48 \| good	6.477 \| good	19.501 \| good	52.192 \| good	0.223 \| good	4.639 \| good	0.22 \| good
2026-07-10T04:00:00.000Z	47 \| good	6.131 \| good	18.581 \| good	50.972 \| good	0.223 \| good	4.077 \| good	0.22 \| good
2026-07-10T05:00:00.000Z	44 \| good	5.299 \| good	13.821 \| good	47.66 \| good	0.232 \| good	4.254 \| good	0.191 \| good
2026-07-10T06:00:00.000Z	36 \| good	5.47 \| good	11.292 \| good	39.056 \| good	0.234 \| good	4.141 \| good	0.191 \| good
2026-07-10T07:00:00.000Z	36 \| good	5.746 \| good	17.749 \| good	38.861 \| good	0.226 \| good	4.526 \| good	0.191 \| good
2026-07-10T08:00:00.000Z	33 \| good	5.667 \| good	21.696 \| good	34.875 \| good	0.244 \| good	4.03 \| good	0.18 \| good
2026-07-10T09:00:00.000Z	32 \| good	4.848 \| good	14.924 \| good	34.696 \| good	0.223 \| good	7.529 \| good	0.189 \| good
2026-07-10T10:00:00.000Z	32 \| good	4.61 \| good	13.494 \| good	35.175 \| good	0.26 \| good	5.713 \| good	0.228 \| good
2026-07-10T11:00:00.000Z	31 \| good	4.986 \| good	16.344 \| good	33.538 \| good	0.237 \| good	4.796 \| good	0.238 \| good
2026-07-10T12:00:00.000Z	32 \| good	5.471 \| good	20.708 \| good	34.584 \| good	0.238 \| good	3.347 \| good	0.228 \| good
2026-07-10T13:00:00.000Z	33 \| good	5.754 \| good	12.934 \| good	34.411 \| good	0.235 \| good	3.316 \| good	0.228 \| good
2026-07-10T14:00:00.000Z	33 \| good	6.19 \| good	11.879 \| good	36.384 \| good	0.6 \| good	2.689 \| good	0.271 \| good
2026-07-10T15:00:00.000Z	34 \| good	6.122 \| good	22.33 \| good	36.917 \| good	0.4 \| good	3.006 \| good	0.262 \| good
2026-07-10T16:00:00.000Z	34 \| good	5.818 \| good	28.406 \| good	36.796 \| good	0.43 \| good	4.31 \| good	0.262 \| good
2026-07-10T17:00:00.000Z	34 \| good	5.576 \| good	12.263 \| good	37.167 \| good	0.4 \| good	1.87 \| good	0.218 \| good
2026-07-10T18:00:00.000Z	36 \| good	4.963 \| good	17.941 \| good	39.436 \| good	0.503 \| good	2.318 \| good	0.21 \| good
2026-07-10T19:00:00.000Z	32 \| good	4.5 \| good	15.914 \| good	35.339 \| good	0.541 \| good	2.831 \| good	0.21 \| good
2026-07-10T20:00:00.000Z	31 \| good	3.701 \| good	10.396 \| good	34.151 \| good	0.357 \| good	2.581 \| good	0.219 \| good
2026-07-10T21:00:00.000Z	32 \| good	3.826 \| good	14.717 \| good	34.894 \| good	0.301 \| good	2.154 \| good	0.219 \| good
2026-07-10T22:00:00.000Z	32 \| good	3.432 \| good	14.744 \| good	34.897 \| good	0.293 \| good	1.757 \| good	0.218 \| good
2026-07-10T23:00:00.000Z	29 \| good	4.173 \| good	8.911 \| good	31.094 \| good	0.289 \| good	1.907 \| good	0.209 \| good
2026-07-11T00:00:00.000Z	27 \| good	3.837 \| good	16.115 \| good	29.394 \| good	0.316 \| good	2.701 \| good	0.208 \| good
2026-07-11T01:00:00.000Z	25 \| good	3.954 \| good	10.508 \| good	26.516 \| good	0.378 \| good	3.19 \| good	0.215 \| good
2026-07-11T02:00:00.000Z	33 \| good	5.648 \| good	15.276 \| good	26.901 \| good	0.3 \| good	3.655 \| good	0.287 \| good
2026-07-11T03:00:00.000Z	73 \| moderate	21.325 \| fine	93.238 \| fine	30.99 \| good	0.221 \| good	8.519 \| good	0.254 \| good
2026-07-11T04:00:00.000Z	33 \| good	6.359 \| good	22.869 \| good	23.313 \| good	0.299 \| good	5.159 \| good	0.412 \| good
2026-07-11T05:00:00.000Z	49 \| good	8.553 \| good	28.866 \| good	23.719 \| good	0.326 \| good	4.187 \| good	0.288 \| good
2026-07-11T06:00:00.000Z	44 \| good	7.897 \| good	19.75 \| good	23.763 \| good	0.275 \| good	4.276 \| good	0.279 \| good
2026-07-11T07:00:00.000Z	52 \| moderate	9.882 \| good	33.033 \| good	24.732 \| good	0.275 \| good	4.447 \| good	0.27 \| good
2026-07-11T08:00:00.000Z	56 \| moderate	12.154 \| fine	38.963 \| good	26.589 \| good	0.289 \| good	4.497 \| good	0.207 \| good
2026-07-11T09:00:00.000Z	52 \| moderate	9.516 \| good	45.452 \| good	26.538 \| good	0.204 \| good	3.053 \| good	0.198 \| good
2026-07-11T10:00:00.000Z	54 \| moderate	11.2 \| good	38.667 \| good	21.412 \| good	0.272 \| good	3.972 \| good	0.199 \| good
2026-07-11T11:00:00.000Z	56 \| moderate	11.718 \| good	31.936 \| good	32.1 \| good	0.269 \| good	4.487 \| good	0.209 \| good
2026-07-11T12:00:00.000Z	56 \| moderate	11.718 \| good	31.936 \| good	32.1 \| good	0.269 \| good	4.487 \| good	0.209 \| good
2026-07-11T13:00:00.000Z	49 \| good	9.218 \| good	40.973 \| good	27.741 \| good	0.293 \| good	1.643 \| good	0.164 \| good
2026-07-11T14:00:00.000Z	49 \| good	8.594 \| good	37.267 \| good	31.107 \| good	0.307 \| good	1.005 \| good	0.151 \| good
2026-07-11T15:00:00.000Z	49 \| good	8.518 \| good	37.094 \| good	33.22 \| good	0.295 \| good	0.688 \| good	0.145 \| good
2026-07-11T16:00:00.000Z	49 \| good	8.933 \| good	39.06 \| good	31.874 \| good	0.289 \| good	0.548 \| good	0.143 \| good
2026-07-11T17:00:00.000Z	44 \| good	7.921 \| good	34.912 \| good	30.599 \| good	0.286 \| good	0.485 \| good	0.143 \| good
2026-07-11T18:00:00.000Z	44 \| good	7.567 \| good	33.062 \| good	30.331 \| good	0.286 \| good	0.459 \| good	0.144 \| good
2026-07-11T19:00:00.000Z	33 \| good	5.723 \| good	25.048 \| good	25.141 \| good	0.279 \| good	0.467 \| good	0.144 \| good
2026-07-11T20:00:00.000Z	23 \| good	4.435 \| good	19.153 \| good	24.622 \| good	0.273 \| good	0.506 \| good	0.145 \| good
2026-07-11T21:00:00.000Z	38 \| good	6.861 \| good	30.178 \| good	27.804 \| good	0.268 \| good	0.617 \| good	0.146 \| good
2026-07-11T22:00:00.000Z	60 \| moderate	13.691 \| fine	60.805 \| fine	35.225 \| good	0.242 \| good	1.75 \| good	0.161 \| good
2026-07-11T23:00:00.000Z	67 \| moderate	18.204 \| fine	80.775 \| fine	37.346 \| good	0.22 \| good	2.989 \| good	0.179 \| good
2026-07-12T00:00:00.000Z	66 \| moderate	17.333 \| fine	76.983 \| fine	33.27 \| good	0.201 \| good	5.188 \| good	0.208 \| good
2026-07-12T01:00:00.000Z	69 \| moderate	18.767 \| fine	82.986 \| fine	34.355 \| good	0.225 \| good	7.506 \| good	0.221 \| good
2026-07-12T02:00:00.000Z	67 \| moderate	17.952 \| fine	79.111 \| fine	37.533 \| good	0.225 \| good	7.482 \| good	0.214 \| good
2026-07-12T03:00:00.000Z	67 \| moderate	18.029 \| fine	79.125 \| fine	36.388 \| good	0.213 \| good	6.304 \| good	0.196 \| good
2026-07-12T04:00:00.000Z	67 \| moderate	18.378 \| fine	80.964 \| fine	34.6 \| good	0.197 \| good	5.785 \| good	0.186 \| good
2026-07-12T05:00:00.000Z	69 \| moderate	18.973 \| fine	83.18 \| fine	33.563 \| good	0.175 \| good	4.796 \| good	0.175 \| good
2026-07-12T06:00:00.000Z	71 \| moderate	19.658 \| fine	86.902 \| fine	31.645 \| good	0.155 \| good	3.438 \| good	0.159 \| good
2026-07-12T07:00:00.000Z	71 \| moderate	20.098 \| fine	88.786 \| fine	30.178 \| good	0.143 \| good	2.675 \| good	0.148 \| good
2026-07-12T08:00:00.000Z	67 \| moderate	18.357 \| fine	80.866 \| fine	25.351 \| good	0.138 \| good	2.368 \| good	0.142 \| good
2026-07-12T09:00:00.000Z	62 \| moderate	14.761 \| fine	66.455 \| fine	26.835 \| good	0.139 \| good	2.33 \| good	0.139 \| good
2026-07-12T10:00:00.000Z	49 \| good	9.451 \| good	42.581 \| good	26.184 \| good	0.139 \| good	2.272 \| good	0.139 \| good
2026-07-12T11:00:00.000Z	33 \| good	6.46 \| good	28.841 \| good	24.873 \| good	0.134 \| good	1.832 \| good	0.14 \| good
2026-07-12T12:00:00.000Z	49 \| good	8.564 \| good	37.089 \| good	28.055 \| good	0.141 \| good	1.343 \| good	0.141 \| good
2026-07-12T13:00:00.000Z	33 \| good	6.168 \| good	27.038 \| good	29.699 \| good	0.163 \| good	0.889 \| good	0.137 \| good
2026-07-12T14:00:00.000Z	33 \| good	5.75 \| good	25.056 \| good	31.861 \| good	0.17 \| good	0.641 \| good	0.135 \| good
2026-07-12T15:00:00.000Z	38 \| good	7.058 \| good	30.992 \| good	35.013 \| good	0.158 \| good	0.479 \| good	0.133 \| good
2026-07-12T16:00:00.000Z	38 \| good	7.155 \| good	31.903 \| good	33.974 \| good	0.146 \| good	0.388 \| good	0.132 \| good
2026-07-12T17:00:00.000Z	38 \| good	6.648 \| good	29.859 \| good	32.883 \| good	0.14 \| good	0.359 \| good	0.134 \| good
2026-07-12T18:00:00.000Z	38 \| good	7.355 \| good	32.019 \| good	34.741 \| good	0.135 \| good	0.368 \| good	0.135 \| good
2026-07-12T19:00:00.000Z	33 \| good	6.068 \| good	26.96 \| good	34.721 \| good	0.132 \| good	0.402 \| good	0.136 \| good
2026-07-12T20:00:00.000Z	33 \| good	5.611 \| good	24.059 \| good	30.579 \| good	0.132 \| good	0.478 \| good	0.138 \| good
2026-07-12T21:00:00.000Z	38 \| good	6.55 \| good	28.996 \| good	30.147 \| good	0.133 \| good	0.604 \| good	0.141 \| good
2026-07-12T22:00:00.000Z	49 \| good	8.646 \| good	37.932 \| good	36.417 \| good	0.133 \| good	1.062 \| good	0.149 \| good
2026-07-12T23:00:00.000Z	44 \| good	7.692 \| good	34.055 \| good	39.385 \| good	0.13 \| good	2.172 \| good	0.168 \| good
2026-07-13T00:00:00.000Z	44 \| good	8 \| good	35.204 \| good	38.433 \| good	0.141 \| good	2.995 \| good	0.177 \| good
2026-07-13T01:00:00.000Z	49 \| good	8.815 \| good	38.326 \| good	36.859 \| good	0.158 \| good	3.912 \| good	0.185 \| good
2026-07-13T02:00:00.000Z	44 \| good	8.098 \| good	35.239 \| good	37.15 \| good	0.165 \| good	3.87 \| good	0.183 \| good
2026-07-13T03:00:00.000Z	38 \| good	6.741 \| good	30.082 \| good	35.159 \| good	0.168 \| good	3.741 \| good	0.178 \| good
2026-07-13T04:00:00.000Z	30 \| good	5.356 \| good	23.065 \| good	31.839 \| good	0.169 \| good	3.61 \| good	0.174 \| good
2026-07-13T05:00:00.000Z	29 \| good	4.444 \| good	19.117 \| good	31.09 \| good	0.17 \| good	3.371 \| good	0.17 \| good
2026-07-13T06:00:00.000Z	38 \| good	7.028 \| good	7.859 \| good	35.823 \| good	0.183 \| good	3.316 \| good	0.166 \| good
2026-07-13T07:00:00.000Z	28 \| good	4.034 \| good	17.957 \| good	30.259 \| good	0.209 \| good	3.384 \| good	0.164 \| good
2026-07-13T08:00:00.000Z	28 \| good	4.855 \| good	21.009 \| good	29.902 \| good	0.254 \| good	3.679 \| good	0.163 \| good
2026-07-13T09:00:00.000Z	33 \| good	6.148 \| good	27.115 \| good	28.914 \| good	0.313 \| good	3.998 \| good	0.163 \| good
2026-07-13T10:00:00.000Z	38 \| good	6.979 \| good	30.964 \| good	26.249 \| good	0.378 \| good	4.136 \| good	0.164 \| good
2026-07-13T11:00:00.000Z	38 \| good	6.705 \| good	29.959 \| good	26.954 \| good	0.416 \| good	3.503 \| good	0.168 \| good
2026-07-13T12:00:00.000Z	52 \| moderate	10.316 \| good	10.844 \| good	44.526 \| good	0.475 \| good	2.75 \| good	0.174 \| good

Leicester

Get reliable air quality data to drive your business

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

0.22ppm

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 03:00:00 on 2026-07-11.

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 01:00:00 on 2026-07-11.

What is the AQI in Leicester, Massachusetts right now?

As of now, the AQI in Leicester, Massachusetts is 56, 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 11.718 μg/m³.

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

The PM₁₀ concentration in Leicester, Massachusetts is 31.936 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 0.209 ppm.

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

Currently, Leicester, Massachusetts has a sulfur dioxide (SO₂) concentration of 0.269 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 32.1 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 4.487 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-09T13:00:00.000Z	38 \| good	6.807 \| good	19.963 \| good	38.207 \| good	0.433 \| good	7.066 \| good	0.288 \| good
2026-07-09T14:00:00.000Z	52 \| moderate	7.816 \| good	57.203 \| fine	37.621 \| good	0.239 \| good	3.892 \| good	0.226 \| good
2026-07-09T15:00:00.000Z	36 \| good	5.605 \| good	30.066 \| good	39.392 \| good	0.217 \| good	3.089 \| good	0.2 \| good
2026-07-09T16:00:00.000Z	36 \| good	5.723 \| good	24.284 \| good	38.507 \| good	0.226 \| good	2.735 \| good	0.2 \| good
2026-07-09T17:00:00.000Z	37 \| good	4.458 \| good	20.269 \| good	40.013 \| good	0.416 \| good	2.082 \| good	0.2 \| good
2026-07-09T18:00:00.000Z	39 \| good	5.245 \| good	21.255 \| good	41.592 \| good	0.45 \| good	3.596 \| good	0.301 \| good
2026-07-09T19:00:00.000Z	37 \| good	4.272 \| good	15.228 \| good	40.426 \| good	0.435 \| good	2.554 \| good	0.188 \| good
2026-07-09T20:00:00.000Z	42 \| good	4.598 \| good	13.288 \| good	45.185 \| good	0.235 \| good	3.128 \| good	0.378 \| good
2026-07-09T21:00:00.000Z	45 \| good	4.952 \| good	18.882 \| good	48.786 \| good	0.291 \| good	4.38 \| good	0.262 \| good
2026-07-09T22:00:00.000Z	47 \| good	5.731 \| good	16.291 \| good	51.397 \| good	0.236 \| good	3.701 \| good	0.262 \| good
2026-07-09T23:00:00.000Z	54 \| moderate	7.546 \| good	29.853 \| good	56.136 \| fine	0.235 \| good	6.32 \| good	0.273 \| good
2026-07-10T00:00:00.000Z	84 \| moderate	7.513 \| good	17.634 \| good	65.311 \| fine	0.236 \| good	5.314 \| good	0.29 \| good
2026-07-10T01:00:00.000Z	84 \| moderate	7.543 \| good	16.739 \| good	64.954 \| fine	0.236 \| good	5.14 \| good	0.27 \| good
2026-07-10T02:00:00.000Z	84 \| moderate	7.299 \| good	20.646 \| good	64.861 \| fine	0.244 \| good	4.059 \| good	0.218 \| good
2026-07-10T03:00:00.000Z	48 \| good	6.477 \| good	19.501 \| good	52.192 \| good	0.223 \| good	4.639 \| good	0.22 \| good
2026-07-10T04:00:00.000Z	47 \| good	6.131 \| good	18.581 \| good	50.972 \| good	0.223 \| good	4.077 \| good	0.22 \| good
2026-07-10T05:00:00.000Z	44 \| good	5.299 \| good	13.821 \| good	47.66 \| good	0.232 \| good	4.254 \| good	0.191 \| good
2026-07-10T06:00:00.000Z	36 \| good	5.47 \| good	11.292 \| good	39.056 \| good	0.234 \| good	4.141 \| good	0.191 \| good
2026-07-10T07:00:00.000Z	36 \| good	5.746 \| good	17.749 \| good	38.861 \| good	0.226 \| good	4.526 \| good	0.191 \| good
2026-07-10T08:00:00.000Z	33 \| good	5.667 \| good	21.696 \| good	34.875 \| good	0.244 \| good	4.03 \| good	0.18 \| good
2026-07-10T09:00:00.000Z	32 \| good	4.848 \| good	14.924 \| good	34.696 \| good	0.223 \| good	7.529 \| good	0.189 \| good
2026-07-10T10:00:00.000Z	32 \| good	4.61 \| good	13.494 \| good	35.175 \| good	0.26 \| good	5.713 \| good	0.228 \| good
2026-07-10T11:00:00.000Z	31 \| good	4.986 \| good	16.344 \| good	33.538 \| good	0.237 \| good	4.796 \| good	0.238 \| good
2026-07-10T12:00:00.000Z	32 \| good	5.471 \| good	20.708 \| good	34.584 \| good	0.238 \| good	3.347 \| good	0.228 \| good
2026-07-10T13:00:00.000Z	33 \| good	5.754 \| good	12.934 \| good	34.411 \| good	0.235 \| good	3.316 \| good	0.228 \| good
2026-07-10T14:00:00.000Z	33 \| good	6.19 \| good	11.879 \| good	36.384 \| good	0.6 \| good	2.689 \| good	0.271 \| good
2026-07-10T15:00:00.000Z	34 \| good	6.122 \| good	22.33 \| good	36.917 \| good	0.4 \| good	3.006 \| good	0.262 \| good
2026-07-10T16:00:00.000Z	34 \| good	5.818 \| good	28.406 \| good	36.796 \| good	0.43 \| good	4.31 \| good	0.262 \| good
2026-07-10T17:00:00.000Z	34 \| good	5.576 \| good	12.263 \| good	37.167 \| good	0.4 \| good	1.87 \| good	0.218 \| good
2026-07-10T18:00:00.000Z	36 \| good	4.963 \| good	17.941 \| good	39.436 \| good	0.503 \| good	2.318 \| good	0.21 \| good
2026-07-10T19:00:00.000Z	32 \| good	4.5 \| good	15.914 \| good	35.339 \| good	0.541 \| good	2.831 \| good	0.21 \| good
2026-07-10T20:00:00.000Z	31 \| good	3.701 \| good	10.396 \| good	34.151 \| good	0.357 \| good	2.581 \| good	0.219 \| good
2026-07-10T21:00:00.000Z	32 \| good	3.826 \| good	14.717 \| good	34.894 \| good	0.301 \| good	2.154 \| good	0.219 \| good
2026-07-10T22:00:00.000Z	32 \| good	3.432 \| good	14.744 \| good	34.897 \| good	0.293 \| good	1.757 \| good	0.218 \| good
2026-07-10T23:00:00.000Z	29 \| good	4.173 \| good	8.911 \| good	31.094 \| good	0.289 \| good	1.907 \| good	0.209 \| good
2026-07-11T00:00:00.000Z	27 \| good	3.837 \| good	16.115 \| good	29.394 \| good	0.316 \| good	2.701 \| good	0.208 \| good
2026-07-11T01:00:00.000Z	25 \| good	3.954 \| good	10.508 \| good	26.516 \| good	0.378 \| good	3.19 \| good	0.215 \| good
2026-07-11T02:00:00.000Z	33 \| good	5.648 \| good	15.276 \| good	26.901 \| good	0.3 \| good	3.655 \| good	0.287 \| good
2026-07-11T03:00:00.000Z	73 \| moderate	21.325 \| fine	93.238 \| fine	30.99 \| good	0.221 \| good	8.519 \| good	0.254 \| good
2026-07-11T04:00:00.000Z	33 \| good	6.359 \| good	22.869 \| good	23.313 \| good	0.299 \| good	5.159 \| good	0.412 \| good
2026-07-11T05:00:00.000Z	49 \| good	8.553 \| good	28.866 \| good	23.719 \| good	0.326 \| good	4.187 \| good	0.288 \| good
2026-07-11T06:00:00.000Z	44 \| good	7.897 \| good	19.75 \| good	23.763 \| good	0.275 \| good	4.276 \| good	0.279 \| good
2026-07-11T07:00:00.000Z	52 \| moderate	9.882 \| good	33.033 \| good	24.732 \| good	0.275 \| good	4.447 \| good	0.27 \| good
2026-07-11T08:00:00.000Z	56 \| moderate	12.154 \| fine	38.963 \| good	26.589 \| good	0.289 \| good	4.497 \| good	0.207 \| good
2026-07-11T09:00:00.000Z	52 \| moderate	9.516 \| good	45.452 \| good	26.538 \| good	0.204 \| good	3.053 \| good	0.198 \| good
2026-07-11T10:00:00.000Z	54 \| moderate	11.2 \| good	38.667 \| good	21.412 \| good	0.272 \| good	3.972 \| good	0.199 \| good
2026-07-11T11:00:00.000Z	56 \| moderate	11.718 \| good	31.936 \| good	32.1 \| good	0.269 \| good	4.487 \| good	0.209 \| good
2026-07-11T12:00:00.000Z	56 \| moderate	11.718 \| good	31.936 \| good	32.1 \| good	0.269 \| good	4.487 \| good	0.209 \| good
2026-07-11T13:00:00.000Z	49 \| good	9.218 \| good	40.973 \| good	27.741 \| good	0.293 \| good	1.643 \| good	0.164 \| good
2026-07-11T14:00:00.000Z	49 \| good	8.594 \| good	37.267 \| good	31.107 \| good	0.307 \| good	1.005 \| good	0.151 \| good
2026-07-11T15:00:00.000Z	49 \| good	8.518 \| good	37.094 \| good	33.22 \| good	0.295 \| good	0.688 \| good	0.145 \| good
2026-07-11T16:00:00.000Z	49 \| good	8.933 \| good	39.06 \| good	31.874 \| good	0.289 \| good	0.548 \| good	0.143 \| good
2026-07-11T17:00:00.000Z	44 \| good	7.921 \| good	34.912 \| good	30.599 \| good	0.286 \| good	0.485 \| good	0.143 \| good
2026-07-11T18:00:00.000Z	44 \| good	7.567 \| good	33.062 \| good	30.331 \| good	0.286 \| good	0.459 \| good	0.144 \| good
2026-07-11T19:00:00.000Z	33 \| good	5.723 \| good	25.048 \| good	25.141 \| good	0.279 \| good	0.467 \| good	0.144 \| good
2026-07-11T20:00:00.000Z	23 \| good	4.435 \| good	19.153 \| good	24.622 \| good	0.273 \| good	0.506 \| good	0.145 \| good
2026-07-11T21:00:00.000Z	38 \| good	6.861 \| good	30.178 \| good	27.804 \| good	0.268 \| good	0.617 \| good	0.146 \| good
2026-07-11T22:00:00.000Z	60 \| moderate	13.691 \| fine	60.805 \| fine	35.225 \| good	0.242 \| good	1.75 \| good	0.161 \| good
2026-07-11T23:00:00.000Z	67 \| moderate	18.204 \| fine	80.775 \| fine	37.346 \| good	0.22 \| good	2.989 \| good	0.179 \| good
2026-07-12T00:00:00.000Z	66 \| moderate	17.333 \| fine	76.983 \| fine	33.27 \| good	0.201 \| good	5.188 \| good	0.208 \| good
2026-07-12T01:00:00.000Z	69 \| moderate	18.767 \| fine	82.986 \| fine	34.355 \| good	0.225 \| good	7.506 \| good	0.221 \| good
2026-07-12T02:00:00.000Z	67 \| moderate	17.952 \| fine	79.111 \| fine	37.533 \| good	0.225 \| good	7.482 \| good	0.214 \| good
2026-07-12T03:00:00.000Z	67 \| moderate	18.029 \| fine	79.125 \| fine	36.388 \| good	0.213 \| good	6.304 \| good	0.196 \| good
2026-07-12T04:00:00.000Z	67 \| moderate	18.378 \| fine	80.964 \| fine	34.6 \| good	0.197 \| good	5.785 \| good	0.186 \| good
2026-07-12T05:00:00.000Z	69 \| moderate	18.973 \| fine	83.18 \| fine	33.563 \| good	0.175 \| good	4.796 \| good	0.175 \| good
2026-07-12T06:00:00.000Z	71 \| moderate	19.658 \| fine	86.902 \| fine	31.645 \| good	0.155 \| good	3.438 \| good	0.159 \| good
2026-07-12T07:00:00.000Z	71 \| moderate	20.098 \| fine	88.786 \| fine	30.178 \| good	0.143 \| good	2.675 \| good	0.148 \| good
2026-07-12T08:00:00.000Z	67 \| moderate	18.357 \| fine	80.866 \| fine	25.351 \| good	0.138 \| good	2.368 \| good	0.142 \| good
2026-07-12T09:00:00.000Z	62 \| moderate	14.761 \| fine	66.455 \| fine	26.835 \| good	0.139 \| good	2.33 \| good	0.139 \| good
2026-07-12T10:00:00.000Z	49 \| good	9.451 \| good	42.581 \| good	26.184 \| good	0.139 \| good	2.272 \| good	0.139 \| good
2026-07-12T11:00:00.000Z	33 \| good	6.46 \| good	28.841 \| good	24.873 \| good	0.134 \| good	1.832 \| good	0.14 \| good
2026-07-12T12:00:00.000Z	49 \| good	8.564 \| good	37.089 \| good	28.055 \| good	0.141 \| good	1.343 \| good	0.141 \| good
2026-07-12T13:00:00.000Z	33 \| good	6.168 \| good	27.038 \| good	29.699 \| good	0.163 \| good	0.889 \| good	0.137 \| good
2026-07-12T14:00:00.000Z	33 \| good	5.75 \| good	25.056 \| good	31.861 \| good	0.17 \| good	0.641 \| good	0.135 \| good
2026-07-12T15:00:00.000Z	38 \| good	7.058 \| good	30.992 \| good	35.013 \| good	0.158 \| good	0.479 \| good	0.133 \| good
2026-07-12T16:00:00.000Z	38 \| good	7.155 \| good	31.903 \| good	33.974 \| good	0.146 \| good	0.388 \| good	0.132 \| good
2026-07-12T17:00:00.000Z	38 \| good	6.648 \| good	29.859 \| good	32.883 \| good	0.14 \| good	0.359 \| good	0.134 \| good
2026-07-12T18:00:00.000Z	38 \| good	7.355 \| good	32.019 \| good	34.741 \| good	0.135 \| good	0.368 \| good	0.135 \| good
2026-07-12T19:00:00.000Z	33 \| good	6.068 \| good	26.96 \| good	34.721 \| good	0.132 \| good	0.402 \| good	0.136 \| good
2026-07-12T20:00:00.000Z	33 \| good	5.611 \| good	24.059 \| good	30.579 \| good	0.132 \| good	0.478 \| good	0.138 \| good
2026-07-12T21:00:00.000Z	38 \| good	6.55 \| good	28.996 \| good	30.147 \| good	0.133 \| good	0.604 \| good	0.141 \| good
2026-07-12T22:00:00.000Z	49 \| good	8.646 \| good	37.932 \| good	36.417 \| good	0.133 \| good	1.062 \| good	0.149 \| good
2026-07-12T23:00:00.000Z	44 \| good	7.692 \| good	34.055 \| good	39.385 \| good	0.13 \| good	2.172 \| good	0.168 \| good
2026-07-13T00:00:00.000Z	44 \| good	8 \| good	35.204 \| good	38.433 \| good	0.141 \| good	2.995 \| good	0.177 \| good
2026-07-13T01:00:00.000Z	49 \| good	8.815 \| good	38.326 \| good	36.859 \| good	0.158 \| good	3.912 \| good	0.185 \| good
2026-07-13T02:00:00.000Z	44 \| good	8.098 \| good	35.239 \| good	37.15 \| good	0.165 \| good	3.87 \| good	0.183 \| good
2026-07-13T03:00:00.000Z	38 \| good	6.741 \| good	30.082 \| good	35.159 \| good	0.168 \| good	3.741 \| good	0.178 \| good
2026-07-13T04:00:00.000Z	30 \| good	5.356 \| good	23.065 \| good	31.839 \| good	0.169 \| good	3.61 \| good	0.174 \| good
2026-07-13T05:00:00.000Z	29 \| good	4.444 \| good	19.117 \| good	31.09 \| good	0.17 \| good	3.371 \| good	0.17 \| good
2026-07-13T06:00:00.000Z	38 \| good	7.028 \| good	7.859 \| good	35.823 \| good	0.183 \| good	3.316 \| good	0.166 \| good
2026-07-13T07:00:00.000Z	28 \| good	4.034 \| good	17.957 \| good	30.259 \| good	0.209 \| good	3.384 \| good	0.164 \| good
2026-07-13T08:00:00.000Z	28 \| good	4.855 \| good	21.009 \| good	29.902 \| good	0.254 \| good	3.679 \| good	0.163 \| good
2026-07-13T09:00:00.000Z	33 \| good	6.148 \| good	27.115 \| good	28.914 \| good	0.313 \| good	3.998 \| good	0.163 \| good
2026-07-13T10:00:00.000Z	38 \| good	6.979 \| good	30.964 \| good	26.249 \| good	0.378 \| good	4.136 \| good	0.164 \| good
2026-07-13T11:00:00.000Z	38 \| good	6.705 \| good	29.959 \| good	26.954 \| good	0.416 \| good	3.503 \| good	0.168 \| good
2026-07-13T12:00:00.000Z	52 \| moderate	10.316 \| good	10.844 \| good	44.526 \| good	0.475 \| good	2.75 \| good	0.174 \| 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?