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

Currently, Leicester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.865 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 19.517 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 6.095 ppb.

Real-time 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)

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)

7.92 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

28.21 μg/m³

155

255

425

605+

Ozone (O₃)

19.52 ppb

201

201+

Sulfur Dioxide (SO₂)

0.86 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.09 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.25 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
2025-06-05T19:00:00.000Z	67 \| moderate	18.303 \| fine	56.751 \| fine	57.386 \| fine	0.792 \| good	3.76 \| good	0.28 \| good
2025-06-05T20:00:00.000Z	67 \| moderate	18.41 \| fine	59.924 \| fine	57.557 \| fine	0.367 \| good	4.777 \| good	0.28 \| good
2025-06-05T21:00:00.000Z	67 \| moderate	18.139 \| fine	72.719 \| fine	59.204 \| fine	0.729 \| good	4.861 \| good	0.28 \| good
2025-06-05T22:00:00.000Z	69 \| moderate	18.921 \| fine	58.167 \| fine	59.268 \| fine	0.675 \| good	5.7 \| good	0.299 \| good
2025-06-05T23:00:00.000Z	69 \| moderate	19.121 \| fine	70.353 \| fine	57.899 \| fine	0.709 \| good	4.542 \| good	0.316 \| good
2025-06-06T00:00:00.000Z	71 \| moderate	19.81 \| fine	48.379 \| good	58.169 \| fine	0.701 \| good	6.042 \| good	0.324 \| good
2025-06-06T01:00:00.000Z	67 \| moderate	18.417 \| fine	61.638 \| fine	59.363 \| fine	0.652 \| good	7.822 \| good	0.324 \| good
2025-06-06T02:00:00.000Z	74 \| moderate	18.954 \| fine	43.136 \| good	61.988 \| fine	0.699 \| good	9.423 \| good	0.324 \| good
2025-06-06T03:00:00.000Z	90 \| moderate	19.325 \| fine	75.595 \| fine	66.514 \| fine	0.718 \| good	10.913 \| good	0.387 \| good
2025-06-06T04:00:00.000Z	87 \| moderate	18.643 \| fine	92.617 \| fine	66.004 \| fine	0.749 \| good	10.216 \| good	0.336 \| good
2025-06-06T05:00:00.000Z	87 \| moderate	19.192 \| fine	75.802 \| fine	66.006 \| fine	0.751 \| good	16.747 \| good	0.279 \| good
2025-06-06T06:00:00.000Z	87 \| moderate	20.198 \| fine	25.68 \| good	65.966 \| fine	0.771 \| good	18.827 \| good	0.213 \| good
2025-06-06T07:00:00.000Z	97 \| moderate	19.506 \| fine	27.453 \| good	68.606 \| fine	0.685 \| good	7.813 \| good	0.257 \| good
2025-06-06T08:00:00.000Z	97 \| moderate	18.713 \| fine	65.199 \| fine	69.432 \| fine	0.645 \| good	5.807 \| good	0.216 \| good
2025-06-06T09:00:00.000Z	71 \| moderate	20.371 \| fine	32.929 \| good	59.62 \| fine	0.644 \| good	4.603 \| good	0.288 \| good
2025-06-06T10:00:00.000Z	69 \| moderate	18.691 \| fine	32.607 \| good	53.255 \| good	0.78 \| good	5.245 \| good	0.277 \| good
2025-06-06T11:00:00.000Z	71 \| moderate	19.763 \| fine	41.255 \| good	50.07 \| good	0.774 \| good	5.289 \| good	0.298 \| good
2025-06-06T12:00:00.000Z	69 \| moderate	19.115 \| fine	40.487 \| good	44.428 \| good	0.811 \| good	5.186 \| good	0.333 \| good
2025-06-06T13:00:00.000Z	66 \| moderate	16.935 \| fine	34.446 \| good	44.589 \| good	0.783 \| good	6.339 \| good	0.274 \| good
2025-06-06T14:00:00.000Z	62 \| moderate	15.284 \| fine	27.077 \| good	44.322 \| good	0.803 \| good	7.496 \| good	0.261 \| good
2025-06-06T15:00:00.000Z	60 \| moderate	13.543 \| fine	43.095 \| good	44.921 \| good	0.579 \| good	5.318 \| good	0.261 \| good
2025-06-06T16:00:00.000Z	60 \| moderate	13.73 \| fine	47.797 \| good	44.369 \| good	0.463 \| good	4.957 \| good	0.261 \| good
2025-06-06T17:00:00.000Z	58 \| moderate	12.987 \| fine	26.42 \| good	50.341 \| good	0.413 \| good	5.412 \| good	0.253 \| good
2025-06-06T18:00:00.000Z	58 \| moderate	13.059 \| fine	33.67 \| good	53.428 \| good	0.537 \| good	6.3 \| good	0.261 \| good
2025-06-06T19:00:00.000Z	60 \| moderate	13.91 \| fine	39.674 \| good	56.438 \| fine	0.528 \| good	8.3 \| good	0.398 \| good
2025-06-06T20:00:00.000Z	64 \| moderate	16.376 \| fine	67.589 \| fine	55.456 \| fine	0.638 \| good	6.042 \| good	0.327 \| good
2025-06-06T21:00:00.000Z	64 \| moderate	16.049 \| fine	53.318 \| good	56.847 \| fine	0.899 \| good	6.761 \| good	0.353 \| good
2025-06-06T22:00:00.000Z	66 \| moderate	17.32 \| fine	53.467 \| good	53.562 \| good	0.452 \| good	6.735 \| good	0.344 \| good
2025-06-06T23:00:00.000Z	62 \| moderate	14.646 \| fine	39.327 \| good	46.873 \| good	0.878 \| good	8.88 \| good	0.346 \| good
2025-06-07T00:00:00.000Z	62 \| moderate	14.562 \| fine	38.805 \| good	44.325 \| good	0.735 \| good	7.434 \| good	0.353 \| good
2025-06-07T01:00:00.000Z	62 \| moderate	14.641 \| fine	54.859 \| good	44.394 \| good	0.285 \| good	4.107 \| good	0.301 \| good
2025-06-07T02:00:00.000Z	58 \| moderate	12.962 \| fine	55.868 \| fine	45.158 \| good	0.684 \| good	4.973 \| good	0.299 \| good
2025-06-07T03:00:00.000Z	62 \| moderate	15.022 \| fine	57.917 \| fine	42.78 \| good	0.794 \| good	7.256 \| good	0.272 \| good
2025-06-07T04:00:00.000Z	52 \| moderate	10.323 \| good	29.357 \| good	43.984 \| good	0.802 \| good	4.019 \| good	0.216 \| good
2025-06-07T05:00:00.000Z	58 \| moderate	12.795 \| fine	28.217 \| good	43.923 \| good	1.022 \| good	5.523 \| good	0.151 \| good
2025-06-07T06:00:00.000Z	52 \| moderate	9.517 \| good	43.453 \| good	43.848 \| good	1.005 \| good	6.599 \| good	0.151 \| good
2025-06-07T07:00:00.000Z	55 \| moderate	7.05 \| good	63.328 \| fine	31.887 \| good	0.709 \| good	5.916 \| good	0.19 \| good
2025-06-07T08:00:00.000Z	60 \| moderate	13.972 \| fine	63.213 \| fine	30.875 \| good	0.759 \| good	5.435 \| good	0.19 \| good
2025-06-07T09:00:00.000Z	56 \| moderate	11.726 \| good	21.089 \| good	23.968 \| good	0.747 \| good	7.886 \| good	0.258 \| good
2025-06-07T10:00:00.000Z	62 \| moderate	14.574 \| fine	45.698 \| good	24.217 \| good	0.768 \| good	6.389 \| good	0.251 \| good
2025-06-07T11:00:00.000Z	60 \| moderate	13.67 \| fine	47.858 \| good	21.613 \| good	0.695 \| good	2.962 \| good	0.196 \| good
2025-06-07T12:00:00.000Z	56 \| moderate	11.905 \| good	30.342 \| good	19.745 \| good	0.755 \| good	2.849 \| good	0.196 \| good
2025-06-07T13:00:00.000Z	54 \| moderate	11.211 \| good	29.888 \| good	18.931 \| good	0.731 \| good	4.081 \| good	0.26 \| good
2025-06-07T14:00:00.000Z	49 \| good	8.983 \| good	15.095 \| good	19.476 \| good	0.807 \| good	4.302 \| good	0.26 \| good
2025-06-07T15:00:00.000Z	54 \| moderate	11.121 \| good	42.482 \| good	16.434 \| good	0.777 \| good	4.262 \| good	0.323 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	11.095 \| good	39.971 \| good	20.096 \| good	0.579 \| good	6.869 \| good	0.26 \| good
2025-06-07T17:00:00.000Z	44 \| good	7.925 \| good	28.215 \| good	19.517 \| good	0.865 \| good	6.095 \| good	0.252 \| good
2025-06-07T18:00:00.000Z	49 \| good	8.631 \| good	16.444 \| good	18.82 \| good	0.855 \| good	3.434 \| good	0.252 \| good
2025-06-07T18:00:00.000Z	44 \| good	7.925 \| good	28.215 \| good	19.517 \| good	0.865 \| good	6.095 \| good	0.252 \| good
2025-06-07T19:00:00.000Z	38 \| good	7.069 \| good	31.036 \| good	33.944 \| good	0.397 \| good	3.137 \| good	0.219 \| good
2025-06-07T20:00:00.000Z	33 \| good	6.254 \| good	27.944 \| good	35.843 \| good	0.393 \| good	3.13 \| good	0.218 \| good
2025-06-07T21:00:00.000Z	33 \| good	4.576 \| good	19.94 \| good	36.272 \| good	0.389 \| good	3.123 \| good	0.218 \| good
2025-06-07T22:00:00.000Z	36 \| good	4.41 \| good	19.044 \| good	39.092 \| good	0.305 \| good	4.703 \| good	0.268 \| good
2025-06-07T23:00:00.000Z	39 \| good	5.858 \| good	25.143 \| good	42.436 \| good	0.326 \| good	5.081 \| good	0.266 \| good
2025-06-08T00:00:00.000Z	42 \| good	5.565 \| good	24.128 \| good	45.222 \| good	0.348 \| good	5.458 \| good	0.264 \| good
2025-06-08T01:00:00.000Z	42 \| good	4.93 \| good	21.164 \| good	44.778 \| good	0.33 \| good	3.773 \| good	0.307 \| good
2025-06-08T02:00:00.000Z	40 \| good	6.596 \| good	29.084 \| good	43.108 \| good	0.358 \| good	4.044 \| good	0.301 \| good
2025-06-08T03:00:00.000Z	37 \| good	5.957 \| good	26.972 \| good	40.127 \| good	0.385 \| good	4.316 \| good	0.295 \| good
2025-06-08T04:00:00.000Z	36 \| good	6.098 \| good	27.098 \| good	38.871 \| good	0.373 \| good	2.717 \| good	0.331 \| good
2025-06-08T05:00:00.000Z	38 \| good	7.062 \| good	31.065 \| good	40.125 \| good	0.388 \| good	2.907 \| good	0.327 \| good
2025-06-08T06:00:00.000Z	44 \| good	7.866 \| good	34.106 \| good	36.525 \| good	0.403 \| good	3.098 \| good	0.324 \| good
2025-06-08T07:00:00.000Z	49 \| good	9.149 \| good	40.907 \| good	33.394 \| good	0.398 \| good	1.933 \| good	0.303 \| good
2025-06-08T08:00:00.000Z	52 \| moderate	9.698 \| good	43.066 \| good	31.761 \| good	0.412 \| good	2.053 \| good	0.304 \| good
2025-06-08T09:00:00.000Z	52 \| moderate	9.626 \| good	43.065 \| good	26.8 \| good	0.426 \| good	2.173 \| good	0.305 \| good
2025-06-08T10:00:00.000Z	52 \| moderate	9.877 \| good	44.041 \| good	28.632 \| good	0.376 \| good	1.916 \| good	0.281 \| good
2025-06-08T11:00:00.000Z	54 \| moderate	11.094 \| good	49.102 \| good	25.559 \| good	0.412 \| good	1.995 \| good	0.284 \| good
2025-06-08T12:00:00.000Z	54 \| moderate	10.785 \| good	48.04 \| good	28.742 \| good	0.448 \| good	2.074 \| good	0.287 \| good
2025-06-08T13:00:00.000Z	44 \| good	7.606 \| good	33.115 \| good	33.797 \| good	0.491 \| good	1.623 \| good	0.287 \| good
2025-06-08T14:00:00.000Z	49 \| good	8.862 \| good	39.084 \| good	38.667 \| good	0.513 \| good	1.72 \| good	0.288 \| good
2025-06-08T15:00:00.000Z	54 \| moderate	10.611 \| good	47.074 \| good	39.421 \| good	0.535 \| good	1.817 \| good	0.289 \| good
2025-06-08T16:00:00.000Z	58 \| moderate	12.912 \| fine	57.341 \| fine	40.766 \| good	0.443 \| good	1.44 \| good	0.27 \| good
2025-06-08T17:00:00.000Z	64 \| moderate	15.598 \| fine	69.159 \| fine	42.46 \| good	0.459 \| good	1.486 \| good	0.266 \| good
2025-06-08T18:00:00.000Z	67 \| moderate	18.081 \| fine	79.144 \| fine	46.809 \| good	0.475 \| good	1.532 \| good	0.262 \| good
2025-06-08T19:00:00.000Z	71 \| moderate	19.702 \| fine	86.971 \| fine	52.665 \| good	0.51 \| good	2.715 \| good	0.27 \| good
2025-06-08T20:00:00.000Z	73 \| moderate	20.763 \| fine	91 \| fine	52.376 \| good	0.517 \| good	2.73 \| good	0.269 \| good
2025-06-08T21:00:00.000Z	69 \| moderate	18.906 \| fine	83.147 \| fine	45.189 \| good	0.524 \| good	2.745 \| good	0.268 \| good
2025-06-08T22:00:00.000Z	69 \| moderate	18.588 \| fine	81.279 \| fine	41.363 \| good	0.595 \| good	4.576 \| good	0.292 \| good
2025-06-08T23:00:00.000Z	71 \| moderate	20.293 \| fine	89.135 \| fine	35.305 \| good	0.606 \| good	4.717 \| good	0.293 \| good
2025-06-09T00:00:00.000Z	69 \| moderate	19.324 \| fine	85.088 \| fine	39.168 \| good	0.617 \| good	4.857 \| good	0.295 \| good
2025-06-09T01:00:00.000Z	69 \| moderate	19.163 \| fine	84.961 \| fine	36.562 \| good	0.598 \| good	4.41 \| good	0.292 \| good
2025-06-09T02:00:00.000Z	67 \| moderate	17.821 \| fine	79.123 \| fine	35.65 \| good	0.623 \| good	4.599 \| good	0.292 \| good
2025-06-09T03:00:00.000Z	66 \| moderate	16.548 \| fine	73.219 \| fine	35.341 \| good	0.648 \| good	4.789 \| good	0.291 \| good
2025-06-09T04:00:00.000Z	62 \| moderate	14.796 \| fine	65.279 \| fine	36.676 \| good	0.588 \| good	3.171 \| good	0.271 \| good
2025-06-09T05:00:00.000Z	58 \| moderate	13.14 \| fine	59.073 \| fine	35.662 \| good	0.615 \| good	3.335 \| good	0.273 \| good
2025-06-09T06:00:00.000Z	56 \| moderate	12.108 \| fine	54.08 \| good	33.266 \| good	0.643 \| good	3.499 \| good	0.274 \| good
2025-06-09T07:00:00.000Z	54 \| moderate	11.318 \| good	50.081 \| good	31.779 \| good	0.547 \| good	2.28 \| good	0.265 \| good
2025-06-09T08:00:00.000Z	56 \| moderate	12.132 \| fine	54.854 \| good	29.76 \| good	0.566 \| good	2.337 \| good	0.266 \| good
2025-06-09T09:00:00.000Z	56 \| moderate	11.541 \| good	51 \| good	27.521 \| good	0.586 \| good	2.394 \| good	0.266 \| good
2025-06-09T10:00:00.000Z	56 \| moderate	11.684 \| good	51.117 \| good	25.085 \| good	0.443 \| good	2.875 \| good	0.26 \| good
2025-06-09T11:00:00.000Z	56 \| moderate	12.117 \| fine	54.157 \| good	25.616 \| good	0.472 \| good	3.009 \| good	0.26 \| good
2025-06-09T12:00:00.000Z	56 \| moderate	12.438 \| fine	56.803 \| fine	25.679 \| good	0.5 \| good	3.143 \| good	0.26 \| good
2025-06-09T13:00:00.000Z	58 \| moderate	13.172 \| fine	59.112 \| fine	29.57 \| good	0.358 \| good	3.346 \| good	0.237 \| good
2025-06-09T14:00:00.000Z	60 \| moderate	14.186 \| fine	63.276 \| fine	32.395 \| good	0.388 \| good	3.538 \| good	0.233 \| good
2025-06-09T15:00:00.000Z	58 \| moderate	12.599 \| fine	56.955 \| fine	40.765 \| good	0.419 \| good	3.731 \| good	0.23 \| good
2025-06-09T16:00:00.000Z	58 \| moderate	13.45 \| fine	60.89 \| fine	48.084 \| good	0.402 \| good	3.035 \| good	0.186 \| good
2025-06-09T17:00:00.000Z	60 \| moderate	13.697 \| fine	61.173 \| fine	49.415 \| good	0.429 \| good	3.138 \| good	0.18 \| good
2025-06-09T18:00:00.000Z	58 \| moderate	13.264 \| fine	59.21 \| fine	47.963 \| good	0.455 \| good	3.24 \| 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

0.28ppm

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 10:00:00 on 2025-06-06.

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 05:00:00 on 2025-06-07.

What is the AQI in Leicester, Massachusetts right now?

As of now, the AQI in Leicester, Massachusetts is 44, indicating Good 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 7.925 μg/m³.

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

The PM₁₀ concentration in Leicester, Massachusetts is 28.215 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 0.252 ppm.

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

Currently, Leicester, Massachusetts has a sulfur dioxide (SO₂) concentration of 0.865 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 19.517 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 6.095 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-05T19:00:00.000Z	67 \| moderate	18.303 \| fine	56.751 \| fine	57.386 \| fine	0.792 \| good	3.76 \| good	0.28 \| good
2025-06-05T20:00:00.000Z	67 \| moderate	18.41 \| fine	59.924 \| fine	57.557 \| fine	0.367 \| good	4.777 \| good	0.28 \| good
2025-06-05T21:00:00.000Z	67 \| moderate	18.139 \| fine	72.719 \| fine	59.204 \| fine	0.729 \| good	4.861 \| good	0.28 \| good
2025-06-05T22:00:00.000Z	69 \| moderate	18.921 \| fine	58.167 \| fine	59.268 \| fine	0.675 \| good	5.7 \| good	0.299 \| good
2025-06-05T23:00:00.000Z	69 \| moderate	19.121 \| fine	70.353 \| fine	57.899 \| fine	0.709 \| good	4.542 \| good	0.316 \| good
2025-06-06T00:00:00.000Z	71 \| moderate	19.81 \| fine	48.379 \| good	58.169 \| fine	0.701 \| good	6.042 \| good	0.324 \| good
2025-06-06T01:00:00.000Z	67 \| moderate	18.417 \| fine	61.638 \| fine	59.363 \| fine	0.652 \| good	7.822 \| good	0.324 \| good
2025-06-06T02:00:00.000Z	74 \| moderate	18.954 \| fine	43.136 \| good	61.988 \| fine	0.699 \| good	9.423 \| good	0.324 \| good
2025-06-06T03:00:00.000Z	90 \| moderate	19.325 \| fine	75.595 \| fine	66.514 \| fine	0.718 \| good	10.913 \| good	0.387 \| good
2025-06-06T04:00:00.000Z	87 \| moderate	18.643 \| fine	92.617 \| fine	66.004 \| fine	0.749 \| good	10.216 \| good	0.336 \| good
2025-06-06T05:00:00.000Z	87 \| moderate	19.192 \| fine	75.802 \| fine	66.006 \| fine	0.751 \| good	16.747 \| good	0.279 \| good
2025-06-06T06:00:00.000Z	87 \| moderate	20.198 \| fine	25.68 \| good	65.966 \| fine	0.771 \| good	18.827 \| good	0.213 \| good
2025-06-06T07:00:00.000Z	97 \| moderate	19.506 \| fine	27.453 \| good	68.606 \| fine	0.685 \| good	7.813 \| good	0.257 \| good
2025-06-06T08:00:00.000Z	97 \| moderate	18.713 \| fine	65.199 \| fine	69.432 \| fine	0.645 \| good	5.807 \| good	0.216 \| good
2025-06-06T09:00:00.000Z	71 \| moderate	20.371 \| fine	32.929 \| good	59.62 \| fine	0.644 \| good	4.603 \| good	0.288 \| good
2025-06-06T10:00:00.000Z	69 \| moderate	18.691 \| fine	32.607 \| good	53.255 \| good	0.78 \| good	5.245 \| good	0.277 \| good
2025-06-06T11:00:00.000Z	71 \| moderate	19.763 \| fine	41.255 \| good	50.07 \| good	0.774 \| good	5.289 \| good	0.298 \| good
2025-06-06T12:00:00.000Z	69 \| moderate	19.115 \| fine	40.487 \| good	44.428 \| good	0.811 \| good	5.186 \| good	0.333 \| good
2025-06-06T13:00:00.000Z	66 \| moderate	16.935 \| fine	34.446 \| good	44.589 \| good	0.783 \| good	6.339 \| good	0.274 \| good
2025-06-06T14:00:00.000Z	62 \| moderate	15.284 \| fine	27.077 \| good	44.322 \| good	0.803 \| good	7.496 \| good	0.261 \| good
2025-06-06T15:00:00.000Z	60 \| moderate	13.543 \| fine	43.095 \| good	44.921 \| good	0.579 \| good	5.318 \| good	0.261 \| good
2025-06-06T16:00:00.000Z	60 \| moderate	13.73 \| fine	47.797 \| good	44.369 \| good	0.463 \| good	4.957 \| good	0.261 \| good
2025-06-06T17:00:00.000Z	58 \| moderate	12.987 \| fine	26.42 \| good	50.341 \| good	0.413 \| good	5.412 \| good	0.253 \| good
2025-06-06T18:00:00.000Z	58 \| moderate	13.059 \| fine	33.67 \| good	53.428 \| good	0.537 \| good	6.3 \| good	0.261 \| good
2025-06-06T19:00:00.000Z	60 \| moderate	13.91 \| fine	39.674 \| good	56.438 \| fine	0.528 \| good	8.3 \| good	0.398 \| good
2025-06-06T20:00:00.000Z	64 \| moderate	16.376 \| fine	67.589 \| fine	55.456 \| fine	0.638 \| good	6.042 \| good	0.327 \| good
2025-06-06T21:00:00.000Z	64 \| moderate	16.049 \| fine	53.318 \| good	56.847 \| fine	0.899 \| good	6.761 \| good	0.353 \| good
2025-06-06T22:00:00.000Z	66 \| moderate	17.32 \| fine	53.467 \| good	53.562 \| good	0.452 \| good	6.735 \| good	0.344 \| good
2025-06-06T23:00:00.000Z	62 \| moderate	14.646 \| fine	39.327 \| good	46.873 \| good	0.878 \| good	8.88 \| good	0.346 \| good
2025-06-07T00:00:00.000Z	62 \| moderate	14.562 \| fine	38.805 \| good	44.325 \| good	0.735 \| good	7.434 \| good	0.353 \| good
2025-06-07T01:00:00.000Z	62 \| moderate	14.641 \| fine	54.859 \| good	44.394 \| good	0.285 \| good	4.107 \| good	0.301 \| good
2025-06-07T02:00:00.000Z	58 \| moderate	12.962 \| fine	55.868 \| fine	45.158 \| good	0.684 \| good	4.973 \| good	0.299 \| good
2025-06-07T03:00:00.000Z	62 \| moderate	15.022 \| fine	57.917 \| fine	42.78 \| good	0.794 \| good	7.256 \| good	0.272 \| good
2025-06-07T04:00:00.000Z	52 \| moderate	10.323 \| good	29.357 \| good	43.984 \| good	0.802 \| good	4.019 \| good	0.216 \| good
2025-06-07T05:00:00.000Z	58 \| moderate	12.795 \| fine	28.217 \| good	43.923 \| good	1.022 \| good	5.523 \| good	0.151 \| good
2025-06-07T06:00:00.000Z	52 \| moderate	9.517 \| good	43.453 \| good	43.848 \| good	1.005 \| good	6.599 \| good	0.151 \| good
2025-06-07T07:00:00.000Z	55 \| moderate	7.05 \| good	63.328 \| fine	31.887 \| good	0.709 \| good	5.916 \| good	0.19 \| good
2025-06-07T08:00:00.000Z	60 \| moderate	13.972 \| fine	63.213 \| fine	30.875 \| good	0.759 \| good	5.435 \| good	0.19 \| good
2025-06-07T09:00:00.000Z	56 \| moderate	11.726 \| good	21.089 \| good	23.968 \| good	0.747 \| good	7.886 \| good	0.258 \| good
2025-06-07T10:00:00.000Z	62 \| moderate	14.574 \| fine	45.698 \| good	24.217 \| good	0.768 \| good	6.389 \| good	0.251 \| good
2025-06-07T11:00:00.000Z	60 \| moderate	13.67 \| fine	47.858 \| good	21.613 \| good	0.695 \| good	2.962 \| good	0.196 \| good
2025-06-07T12:00:00.000Z	56 \| moderate	11.905 \| good	30.342 \| good	19.745 \| good	0.755 \| good	2.849 \| good	0.196 \| good
2025-06-07T13:00:00.000Z	54 \| moderate	11.211 \| good	29.888 \| good	18.931 \| good	0.731 \| good	4.081 \| good	0.26 \| good
2025-06-07T14:00:00.000Z	49 \| good	8.983 \| good	15.095 \| good	19.476 \| good	0.807 \| good	4.302 \| good	0.26 \| good
2025-06-07T15:00:00.000Z	54 \| moderate	11.121 \| good	42.482 \| good	16.434 \| good	0.777 \| good	4.262 \| good	0.323 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	11.095 \| good	39.971 \| good	20.096 \| good	0.579 \| good	6.869 \| good	0.26 \| good
2025-06-07T17:00:00.000Z	44 \| good	7.925 \| good	28.215 \| good	19.517 \| good	0.865 \| good	6.095 \| good	0.252 \| good
2025-06-07T18:00:00.000Z	49 \| good	8.631 \| good	16.444 \| good	18.82 \| good	0.855 \| good	3.434 \| good	0.252 \| good
2025-06-07T18:00:00.000Z	44 \| good	7.925 \| good	28.215 \| good	19.517 \| good	0.865 \| good	6.095 \| good	0.252 \| good
2025-06-07T19:00:00.000Z	38 \| good	7.069 \| good	31.036 \| good	33.944 \| good	0.397 \| good	3.137 \| good	0.219 \| good
2025-06-07T20:00:00.000Z	33 \| good	6.254 \| good	27.944 \| good	35.843 \| good	0.393 \| good	3.13 \| good	0.218 \| good
2025-06-07T21:00:00.000Z	33 \| good	4.576 \| good	19.94 \| good	36.272 \| good	0.389 \| good	3.123 \| good	0.218 \| good
2025-06-07T22:00:00.000Z	36 \| good	4.41 \| good	19.044 \| good	39.092 \| good	0.305 \| good	4.703 \| good	0.268 \| good
2025-06-07T23:00:00.000Z	39 \| good	5.858 \| good	25.143 \| good	42.436 \| good	0.326 \| good	5.081 \| good	0.266 \| good
2025-06-08T00:00:00.000Z	42 \| good	5.565 \| good	24.128 \| good	45.222 \| good	0.348 \| good	5.458 \| good	0.264 \| good
2025-06-08T01:00:00.000Z	42 \| good	4.93 \| good	21.164 \| good	44.778 \| good	0.33 \| good	3.773 \| good	0.307 \| good
2025-06-08T02:00:00.000Z	40 \| good	6.596 \| good	29.084 \| good	43.108 \| good	0.358 \| good	4.044 \| good	0.301 \| good
2025-06-08T03:00:00.000Z	37 \| good	5.957 \| good	26.972 \| good	40.127 \| good	0.385 \| good	4.316 \| good	0.295 \| good
2025-06-08T04:00:00.000Z	36 \| good	6.098 \| good	27.098 \| good	38.871 \| good	0.373 \| good	2.717 \| good	0.331 \| good
2025-06-08T05:00:00.000Z	38 \| good	7.062 \| good	31.065 \| good	40.125 \| good	0.388 \| good	2.907 \| good	0.327 \| good
2025-06-08T06:00:00.000Z	44 \| good	7.866 \| good	34.106 \| good	36.525 \| good	0.403 \| good	3.098 \| good	0.324 \| good
2025-06-08T07:00:00.000Z	49 \| good	9.149 \| good	40.907 \| good	33.394 \| good	0.398 \| good	1.933 \| good	0.303 \| good
2025-06-08T08:00:00.000Z	52 \| moderate	9.698 \| good	43.066 \| good	31.761 \| good	0.412 \| good	2.053 \| good	0.304 \| good
2025-06-08T09:00:00.000Z	52 \| moderate	9.626 \| good	43.065 \| good	26.8 \| good	0.426 \| good	2.173 \| good	0.305 \| good
2025-06-08T10:00:00.000Z	52 \| moderate	9.877 \| good	44.041 \| good	28.632 \| good	0.376 \| good	1.916 \| good	0.281 \| good
2025-06-08T11:00:00.000Z	54 \| moderate	11.094 \| good	49.102 \| good	25.559 \| good	0.412 \| good	1.995 \| good	0.284 \| good
2025-06-08T12:00:00.000Z	54 \| moderate	10.785 \| good	48.04 \| good	28.742 \| good	0.448 \| good	2.074 \| good	0.287 \| good
2025-06-08T13:00:00.000Z	44 \| good	7.606 \| good	33.115 \| good	33.797 \| good	0.491 \| good	1.623 \| good	0.287 \| good
2025-06-08T14:00:00.000Z	49 \| good	8.862 \| good	39.084 \| good	38.667 \| good	0.513 \| good	1.72 \| good	0.288 \| good
2025-06-08T15:00:00.000Z	54 \| moderate	10.611 \| good	47.074 \| good	39.421 \| good	0.535 \| good	1.817 \| good	0.289 \| good
2025-06-08T16:00:00.000Z	58 \| moderate	12.912 \| fine	57.341 \| fine	40.766 \| good	0.443 \| good	1.44 \| good	0.27 \| good
2025-06-08T17:00:00.000Z	64 \| moderate	15.598 \| fine	69.159 \| fine	42.46 \| good	0.459 \| good	1.486 \| good	0.266 \| good
2025-06-08T18:00:00.000Z	67 \| moderate	18.081 \| fine	79.144 \| fine	46.809 \| good	0.475 \| good	1.532 \| good	0.262 \| good
2025-06-08T19:00:00.000Z	71 \| moderate	19.702 \| fine	86.971 \| fine	52.665 \| good	0.51 \| good	2.715 \| good	0.27 \| good
2025-06-08T20:00:00.000Z	73 \| moderate	20.763 \| fine	91 \| fine	52.376 \| good	0.517 \| good	2.73 \| good	0.269 \| good
2025-06-08T21:00:00.000Z	69 \| moderate	18.906 \| fine	83.147 \| fine	45.189 \| good	0.524 \| good	2.745 \| good	0.268 \| good
2025-06-08T22:00:00.000Z	69 \| moderate	18.588 \| fine	81.279 \| fine	41.363 \| good	0.595 \| good	4.576 \| good	0.292 \| good
2025-06-08T23:00:00.000Z	71 \| moderate	20.293 \| fine	89.135 \| fine	35.305 \| good	0.606 \| good	4.717 \| good	0.293 \| good
2025-06-09T00:00:00.000Z	69 \| moderate	19.324 \| fine	85.088 \| fine	39.168 \| good	0.617 \| good	4.857 \| good	0.295 \| good
2025-06-09T01:00:00.000Z	69 \| moderate	19.163 \| fine	84.961 \| fine	36.562 \| good	0.598 \| good	4.41 \| good	0.292 \| good
2025-06-09T02:00:00.000Z	67 \| moderate	17.821 \| fine	79.123 \| fine	35.65 \| good	0.623 \| good	4.599 \| good	0.292 \| good
2025-06-09T03:00:00.000Z	66 \| moderate	16.548 \| fine	73.219 \| fine	35.341 \| good	0.648 \| good	4.789 \| good	0.291 \| good
2025-06-09T04:00:00.000Z	62 \| moderate	14.796 \| fine	65.279 \| fine	36.676 \| good	0.588 \| good	3.171 \| good	0.271 \| good
2025-06-09T05:00:00.000Z	58 \| moderate	13.14 \| fine	59.073 \| fine	35.662 \| good	0.615 \| good	3.335 \| good	0.273 \| good
2025-06-09T06:00:00.000Z	56 \| moderate	12.108 \| fine	54.08 \| good	33.266 \| good	0.643 \| good	3.499 \| good	0.274 \| good
2025-06-09T07:00:00.000Z	54 \| moderate	11.318 \| good	50.081 \| good	31.779 \| good	0.547 \| good	2.28 \| good	0.265 \| good
2025-06-09T08:00:00.000Z	56 \| moderate	12.132 \| fine	54.854 \| good	29.76 \| good	0.566 \| good	2.337 \| good	0.266 \| good
2025-06-09T09:00:00.000Z	56 \| moderate	11.541 \| good	51 \| good	27.521 \| good	0.586 \| good	2.394 \| good	0.266 \| good
2025-06-09T10:00:00.000Z	56 \| moderate	11.684 \| good	51.117 \| good	25.085 \| good	0.443 \| good	2.875 \| good	0.26 \| good
2025-06-09T11:00:00.000Z	56 \| moderate	12.117 \| fine	54.157 \| good	25.616 \| good	0.472 \| good	3.009 \| good	0.26 \| good
2025-06-09T12:00:00.000Z	56 \| moderate	12.438 \| fine	56.803 \| fine	25.679 \| good	0.5 \| good	3.143 \| good	0.26 \| good
2025-06-09T13:00:00.000Z	58 \| moderate	13.172 \| fine	59.112 \| fine	29.57 \| good	0.358 \| good	3.346 \| good	0.237 \| good
2025-06-09T14:00:00.000Z	60 \| moderate	14.186 \| fine	63.276 \| fine	32.395 \| good	0.388 \| good	3.538 \| good	0.233 \| good
2025-06-09T15:00:00.000Z	58 \| moderate	12.599 \| fine	56.955 \| fine	40.765 \| good	0.419 \| good	3.731 \| good	0.23 \| good
2025-06-09T16:00:00.000Z	58 \| moderate	13.45 \| fine	60.89 \| fine	48.084 \| good	0.402 \| good	3.035 \| good	0.186 \| good
2025-06-09T17:00:00.000Z	60 \| moderate	13.697 \| fine	61.173 \| fine	49.415 \| good	0.429 \| good	3.138 \| good	0.18 \| good
2025-06-09T18:00:00.000Z	58 \| moderate	13.264 \| fine	59.21 \| fine	47.963 \| good	0.455 \| good	3.24 \| good	0.174 \| good

Real-time 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

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

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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?