What is the current level of PM10 in Leominster, Massachusetts?

Leominster, Massachusetts currently has a PM10 concentration of 24.537 μg/m3.

What is the current level of sulfur dioxide (SO2) in Leominster, Massachusetts?

The current sulfur dioxide (SO2) concentration in Leominster, Massachusetts is 0.888 ppb.

What is the current level of ozone (O3) in Leominster, Massachusetts?

Leominster, Massachusetts currently has an ozone (O3) concentration of 15.74 ppm.

What is the current level of nitrogen dioxide (NO2) in Leominster, Massachusetts?

The current level of nitrogen dioxide (NO2) in Leominster, Massachusetts is 4.476 ppb.

Current air quality index in Leominster, Massachusetts today

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

Stay updated with real-time air quality in Leominster, 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

Leominster, Massachusetts

Last updated: ... (Local time)

Major air pollutants in Leominster, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

9.29 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

24.54 μg/m³

155

255

425

605+

Ozone (O₃)

15.74 ppb

201

201+

Sulfur Dioxide (SO₂)

0.89 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.48 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.23 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Leominster, Massachusetts

Get Live Pollen Counts

Leominster, Massachusetts

Scroll To Air Quality Map

Track live Leominster, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-05T18:00:00.000Z	67 \| moderate	18.327 \| fine	69.387 \| fine	54.276 \| good	0.893 \| good	4.597 \| good	0.268 \| good
2025-06-05T19:00:00.000Z	67 \| moderate	18.197 \| fine	40.25 \| good	58.252 \| fine	0.94 \| good	3.489 \| good	0.238 \| good
2025-06-05T20:00:00.000Z	67 \| moderate	18.029 \| fine	52.617 \| good	59.219 \| fine	0.479 \| good	4.64 \| good	0.249 \| good
2025-06-05T21:00:00.000Z	74 \| moderate	17.866 \| fine	67.184 \| fine	62.373 \| fine	0.809 \| good	4.747 \| good	0.249 \| good
2025-06-05T22:00:00.000Z	84 \| moderate	18.641 \| fine	46.03 \| good	65.103 \| fine	0.733 \| good	4.951 \| good	0.261 \| good
2025-06-05T23:00:00.000Z	84 \| moderate	19.07 \| fine	72.895 \| fine	64.948 \| fine	0.761 \| good	4.793 \| good	0.261 \| good
2025-06-06T00:00:00.000Z	71 \| moderate	20.498 \| fine	73.363 \| fine	60.123 \| fine	0.769 \| good	6.042 \| good	0.279 \| good
2025-06-06T01:00:00.000Z	73 \| moderate	20.513 \| fine	85.566 \| fine	56.996 \| fine	0.713 \| good	6.842 \| good	0.279 \| good
2025-06-06T02:00:00.000Z	69 \| moderate	19.184 \| fine	65.065 \| fine	49.231 \| good	0.768 \| good	7.553 \| good	0.279 \| good
2025-06-06T03:00:00.000Z	69 \| moderate	19.192 \| fine	73.034 \| fine	50.53 \| good	0.782 \| good	18.954 \| good	0.312 \| good
2025-06-06T04:00:00.000Z	69 \| moderate	18.852 \| fine	82.6 \| fine	47.201 \| good	0.813 \| good	10.246 \| good	0.32 \| good
2025-06-06T05:00:00.000Z	67 \| moderate	18.226 \| fine	32.541 \| good	53.278 \| good	0.792 \| good	11.552 \| good	0.273 \| good
2025-06-06T06:00:00.000Z	66 \| moderate	17.386 \| fine	66.719 \| fine	56.865 \| fine	0.802 \| good	15.888 \| good	0.196 \| good
2025-06-06T07:00:00.000Z	71 \| moderate	19.618 \| fine	31.083 \| good	43.703 \| good	0.832 \| good	11.429 \| good	0.233 \| good
2025-06-06T08:00:00.000Z	69 \| moderate	18.947 \| fine	65.754 \| fine	42.498 \| good	0.779 \| good	13.843 \| good	0.207 \| good
2025-06-06T09:00:00.000Z	67 \| moderate	18.268 \| fine	55.32 \| fine	38.836 \| good	0.861 \| good	3.674 \| good	0.238 \| good
2025-06-06T10:00:00.000Z	66 \| moderate	16.883 \| fine	51.737 \| good	38.605 \| good	0.872 \| good	3.573 \| good	0.212 \| good
2025-06-06T11:00:00.000Z	67 \| moderate	18.03 \| fine	43.175 \| good	35.4 \| good	0.864 \| good	4.726 \| good	0.201 \| good
2025-06-06T12:00:00.000Z	67 \| moderate	18.258 \| fine	64.264 \| fine	33.225 \| good	0.897 \| good	5.145 \| good	0.234 \| good
2025-06-06T13:00:00.000Z	60 \| moderate	14.051 \| fine	53.111 \| good	28.136 \| good	0.87 \| good	5.897 \| good	0.244 \| good
2025-06-06T14:00:00.000Z	56 \| moderate	12.309 \| fine	33.436 \| good	38.775 \| good	0.868 \| good	7.809 \| good	0.201 \| good
2025-06-06T15:00:00.000Z	58 \| moderate	13.086 \| fine	41.699 \| good	41.661 \| good	0.795 \| good	5.568 \| good	0.201 \| good
2025-06-06T16:00:00.000Z	60 \| moderate	13.668 \| fine	35.54 \| good	38.955 \| good	0.527 \| good	5.995 \| good	0.201 \| good
2025-06-06T17:00:00.000Z	56 \| moderate	11.712 \| good	25.228 \| good	45.034 \| good	0.461 \| good	5.085 \| good	0.189 \| good
2025-06-06T18:00:00.000Z	58 \| moderate	12.767 \| fine	30.123 \| good	51.614 \| good	0.722 \| good	5.958 \| good	0.201 \| good
2025-06-06T19:00:00.000Z	58 \| moderate	12.671 \| fine	46.543 \| good	47.787 \| good	0.716 \| good	6.351 \| good	0.292 \| good
2025-06-06T20:00:00.000Z	64 \| moderate	16.127 \| fine	62.751 \| fine	55.043 \| fine	0.844 \| good	5.559 \| good	0.248 \| good
2025-06-06T21:00:00.000Z	64 \| moderate	16.314 \| fine	50.829 \| good	58.437 \| fine	0.999 \| good	7.026 \| good	0.278 \| good
2025-06-06T22:00:00.000Z	67 \| moderate	15.263 \| fine	64.922 \| fine	60.216 \| fine	0.715 \| good	5.748 \| good	0.259 \| good
2025-06-06T23:00:00.000Z	62 \| moderate	14.61 \| fine	63.355 \| fine	52.634 \| good	0.97 \| good	7.645 \| good	0.248 \| good
2025-06-07T00:00:00.000Z	62 \| moderate	14.932 \| fine	56.81 \| fine	43.289 \| good	0.893 \| good	7.018 \| good	0.259 \| good
2025-06-07T01:00:00.000Z	56 \| moderate	12.212 \| fine	56.204 \| fine	36.412 \| good	0.626 \| good	5.434 \| good	0.282 \| good
2025-06-07T02:00:00.000Z	58 \| moderate	13.089 \| fine	53.472 \| good	39.645 \| good	0.804 \| good	5.164 \| good	0.283 \| good
2025-06-07T03:00:00.000Z	56 \| moderate	11.893 \| good	47.654 \| good	33.714 \| good	0.894 \| good	7.218 \| good	0.245 \| good
2025-06-07T04:00:00.000Z	67 \| moderate	17.621 \| fine	64.485 \| fine	37.382 \| good	0.924 \| good	4.335 \| good	0.208 \| good
2025-06-07T05:00:00.000Z	60 \| moderate	9.966 \| good	73.998 \| fine	33.277 \| good	1.06 \| good	5.369 \| good	0.134 \| good
2025-06-07T06:00:00.000Z	49 \| good	8.836 \| good	29.576 \| good	35.942 \| good	1.046 \| good	6.803 \| good	0.134 \| good
2025-06-07T07:00:00.000Z	56 \| moderate	7.074 \| good	65.826 \| fine	32.111 \| good	0.817 \| good	5.407 \| good	0.173 \| good
2025-06-07T08:00:00.000Z	60 \| moderate	13.548 \| fine	40.74 \| good	26.45 \| good	0.886 \| good	5.333 \| good	0.173 \| good
2025-06-07T09:00:00.000Z	58 \| moderate	13.399 \| fine	37.323 \| good	26.413 \| good	0.908 \| good	4.983 \| good	0.212 \| good
2025-06-07T10:00:00.000Z	54 \| moderate	10.669 \| good	36.33 \| good	27.571 \| good	0.912 \| good	6.454 \| good	0.189 \| good
2025-06-07T11:00:00.000Z	56 \| moderate	12.35 \| fine	52.212 \| good	27.607 \| good	0.839 \| good	3.948 \| good	0.174 \| good
2025-06-07T12:00:00.000Z	52 \| moderate	10.399 \| good	32.93 \| good	18.162 \| good	0.909 \| good	2.899 \| good	0.174 \| good
2025-06-07T13:00:00.000Z	49 \| good	9.293 \| good	24.537 \| good	15.74 \| good	0.888 \| good	4.476 \| good	0.23 \| good
2025-06-07T14:00:00.000Z	44 \| good	7.984 \| good	24.989 \| good	17.137 \| good	0.98 \| good	4.032 \| good	0.23 \| good
2025-06-07T15:00:00.000Z	54 \| moderate	11.049 \| good	22.022 \| good	22.015 \| good	0.95 \| good	4.278 \| good	0.252 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	10.871 \| good	46.406 \| good	21.026 \| good	0.937 \| good	6.076 \| good	0.219 \| good
2025-06-07T14:00:00.000Z	49 \| good	9.293 \| good	24.537 \| good	15.74 \| good	0.888 \| good	4.476 \| good	0.23 \| good
2025-06-07T15:00:00.000Z	49 \| good	9.392 \| good	42.007 \| good	27.153 \| good	0.369 \| good	2.539 \| good	0.24 \| good
2025-06-07T16:00:00.000Z	49 \| good	9.415 \| good	41.851 \| good	27.499 \| good	0.317 \| good	2.163 \| good	0.213 \| good
2025-06-07T17:00:00.000Z	49 \| good	8.77 \| good	38.576 \| good	29.405 \| good	0.327 \| good	2.278 \| good	0.214 \| good
2025-06-07T18:00:00.000Z	33 \| good	6.445 \| good	28.794 \| good	35.99 \| good	0.337 \| good	2.393 \| good	0.216 \| good
2025-06-07T19:00:00.000Z	35 \| good	4.998 \| good	21.337 \| good	38.499 \| good	0.312 \| good	2.751 \| good	0.232 \| good
2025-06-07T20:00:00.000Z	35 \| good	5.746 \| good	24.817 \| good	38.137 \| good	0.357 \| good	3.107 \| good	0.233 \| good
2025-06-07T21:00:00.000Z	37 \| good	5.976 \| good	26.291 \| good	40.245 \| good	0.402 \| good	3.462 \| good	0.233 \| good
2025-06-07T22:00:00.000Z	40 \| good	5.669 \| good	24.169 \| good	42.977 \| good	0.277 \| good	4.751 \| good	0.281 \| good
2025-06-07T23:00:00.000Z	38 \| good	6.569 \| good	29.372 \| good	39.333 \| good	0.343 \| good	5.446 \| good	0.28 \| good
2025-06-08T00:00:00.000Z	36 \| good	5.533 \| good	23.705 \| good	39.298 \| good	0.409 \| good	6.14 \| good	0.279 \| good
2025-06-08T01:00:00.000Z	33 \| good	5.562 \| good	23.821 \| good	34.615 \| good	0.339 \| good	3.768 \| good	0.316 \| good
2025-06-08T02:00:00.000Z	33 \| good	6.271 \| good	27.956 \| good	32.51 \| good	0.396 \| good	4.34 \| good	0.312 \| good
2025-06-08T03:00:00.000Z	38 \| good	6.707 \| good	30 \| good	31.446 \| good	0.452 \| good	4.911 \| good	0.308 \| good
2025-06-08T04:00:00.000Z	38 \| good	7.343 \| good	32.04 \| good	30.387 \| good	0.379 \| good	2.716 \| good	0.329 \| good
2025-06-08T05:00:00.000Z	44 \| good	8.086 \| good	35.498 \| good	27.912 \| good	0.412 \| good	3.108 \| good	0.33 \| good
2025-06-08T06:00:00.000Z	49 \| good	8.701 \| good	38.19 \| good	25.013 \| good	0.445 \| good	3.499 \| good	0.33 \| good
2025-06-08T07:00:00.000Z	49 \| good	8.798 \| good	38.722 \| good	23.197 \| good	0.38 \| good	1.845 \| good	0.29 \| good
2025-06-08T08:00:00.000Z	49 \| good	8.651 \| good	37.787 \| good	22.826 \| good	0.412 \| good	2.088 \| good	0.294 \| good
2025-06-08T09:00:00.000Z	52 \| moderate	10.291 \| good	45.886 \| good	19.024 \| good	0.445 \| good	2.332 \| good	0.299 \| good
2025-06-08T10:00:00.000Z	54 \| moderate	11.078 \| good	49.194 \| good	20.096 \| good	0.372 \| good	1.854 \| good	0.273 \| good
2025-06-08T11:00:00.000Z	56 \| moderate	12.261 \| fine	55.235 \| fine	20.859 \| good	0.426 \| good	2.076 \| good	0.28 \| good
2025-06-08T12:00:00.000Z	56 \| moderate	12.222 \| fine	55.177 \| fine	25.269 \| good	0.48 \| good	2.298 \| good	0.287 \| good
2025-06-08T13:00:00.000Z	49 \| good	9.264 \| good	41.26 \| good	29.886 \| good	0.452 \| good	1.42 \| good	0.27 \| good
2025-06-08T14:00:00.000Z	49 \| good	9.257 \| good	40.909 \| good	33.586 \| good	0.486 \| good	1.554 \| good	0.269 \| good
2025-06-08T15:00:00.000Z	56 \| moderate	11.585 \| good	51.233 \| good	35.027 \| good	0.52 \| good	1.688 \| good	0.268 \| good
2025-06-08T16:00:00.000Z	60 \| moderate	13.681 \| fine	61.729 \| fine	36.841 \| good	0.432 \| good	1.234 \| good	0.254 \| good
2025-06-08T17:00:00.000Z	64 \| moderate	15.559 \| fine	69.735 \| fine	39 \| good	0.464 \| good	1.344 \| good	0.251 \| good
2025-06-08T18:00:00.000Z	67 \| moderate	17.542 \| fine	77.793 \| fine	41.395 \| good	0.497 \| good	1.453 \| good	0.249 \| good
2025-06-08T19:00:00.000Z	71 \| moderate	19.502 \| fine	85.86 \| fine	44.593 \| good	0.502 \| good	2.249 \| good	0.261 \| good
2025-06-08T20:00:00.000Z	71 \| moderate	20.458 \| fine	90.018 \| fine	45.923 \| good	0.52 \| good	2.396 \| good	0.263 \| good
2025-06-08T21:00:00.000Z	71 \| moderate	20.309 \| fine	89.408 \| fine	44.985 \| good	0.538 \| good	2.543 \| good	0.265 \| good
2025-06-08T22:00:00.000Z	73 \| moderate	20.784 \| fine	91.479 \| fine	41.62 \| good	0.58 \| good	4.174 \| good	0.29 \| good
2025-06-08T23:00:00.000Z	75 \| moderate	22.093 \| fine	96.827 \| fine	37.537 \| good	0.607 \| good	4.529 \| good	0.293 \| good
2025-06-09T00:00:00.000Z	71 \| moderate	20.425 \| fine	90.19 \| fine	33.481 \| good	0.633 \| good	4.885 \| good	0.296 \| good
2025-06-09T01:00:00.000Z	71 \| moderate	20.313 \| fine	88.962 \| fine	29.486 \| good	0.591 \| good	4.361 \| good	0.293 \| good
2025-06-09T02:00:00.000Z	71 \| moderate	20.341 \| fine	89.086 \| fine	27.074 \| good	0.629 \| good	4.896 \| good	0.296 \| good
2025-06-09T03:00:00.000Z	71 \| moderate	19.795 \| fine	86.952 \| fine	26.089 \| good	0.666 \| good	5.431 \| good	0.299 \| good
2025-06-09T04:00:00.000Z	69 \| moderate	18.781 \| fine	82.471 \| fine	26.158 \| good	0.579 \| good	3.05 \| good	0.276 \| good
2025-06-09T05:00:00.000Z	67 \| moderate	18.343 \| fine	81.197 \| fine	24.039 \| good	0.609 \| good	3.298 \| good	0.279 \| good
2025-06-09T06:00:00.000Z	66 \| moderate	16.909 \| fine	75.133 \| fine	24.521 \| good	0.639 \| good	3.546 \| good	0.282 \| good
2025-06-09T07:00:00.000Z	58 \| moderate	13.493 \| fine	60.48 \| fine	27.378 \| good	0.537 \| good	1.971 \| good	0.262 \| good
2025-06-09T08:00:00.000Z	58 \| moderate	12.71 \| fine	57.144 \| fine	26.803 \| good	0.564 \| good	2.052 \| good	0.262 \| good
2025-06-09T09:00:00.000Z	58 \| moderate	12.743 \| fine	57 \| fine	22.233 \| good	0.591 \| good	2.133 \| good	0.263 \| good
2025-06-09T10:00:00.000Z	56 \| moderate	12.133 \| fine	54.572 \| good	22.557 \| good	0.452 \| good	2.677 \| good	0.252 \| good
2025-06-09T11:00:00.000Z	56 \| moderate	12.235 \| fine	55.178 \| fine	23.895 \| good	0.485 \| good	2.927 \| good	0.253 \| good
2025-06-09T12:00:00.000Z	58 \| moderate	12.776 \| fine	57.379 \| fine	26.842 \| good	0.518 \| good	3.178 \| good	0.253 \| good
2025-06-09T13:00:00.000Z	60 \| moderate	14.137 \| fine	63.601 \| fine	29.946 \| good	0.356 \| good	3.189 \| good	0.226 \| good
2025-06-09T14:00:00.000Z	62 \| moderate	15.384 \| fine	68.992 \| fine	33.116 \| good	0.399 \| good	3.467 \| good	0.222 \| good

Leominster

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Leominster, Massachusetts

0.21ppm

How accurate is Massachusetts, USA air quality data?

The air quality data for Massachusetts, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for Leominster, Massachusetts get updated?

Air quality updates for Leominster, Massachusetts are available every hour.

What time in the past 24 hours saw the poorest air quality in Leominster, Massachusetts?

Leominster, Massachusetts experienced its worst air quality at 04:00:00, 2025-06-07.

When was air quality in Leominster, Massachusetts the best over the past 24 hours?

The best air quality in Leominster, Massachusetts was observed at 01:00:00 on 2025-06-07.

What is the air quality in Leominster, Massachusetts right now?

The air quality in Leominster, Massachusetts right now is Good, with an AQI of 49.

What pollutant is most frequently found in Leominster, Massachusetts?

In Leominster, Massachusetts, PM2.5 is the most frequently found pollutant.

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

When air quality in Leominster, Massachusetts is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Leominster, Massachusetts right now?

Leominster, Massachusetts currently has a PM_2.5 concentration of 9.293 μg/m³.

What is the current level of PM₁₀ in Leominster, Massachusetts?

Leominster, Massachusetts currently has a PM₁₀ concentration of 24.537 μg/m³.

What is the current level of carbon monoxide (CO) in Leominster, Massachusetts?

The current carbon monoxide (CO) level in Leominster, Massachusetts is 0.23 ppm.

What is the current level of sulfur dioxide (SO₂) in Leominster, Massachusetts?

The current sulfur dioxide (SO₂) concentration in Leominster, Massachusetts is 0.888 ppb.

What is the current level of ozone (O₃) in Leominster, Massachusetts?

Leominster, Massachusetts currently has an ozone (O₃) concentration of 15.74 ppm.

What is the current level of nitrogen dioxide (NO₂) in Leominster, Massachusetts?

The current level of nitrogen dioxide (NO₂) in Leominster, Massachusetts is 4.476 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-05T18:00:00.000Z	67 \| moderate	18.327 \| fine	69.387 \| fine	54.276 \| good	0.893 \| good	4.597 \| good	0.268 \| good
2025-06-05T19:00:00.000Z	67 \| moderate	18.197 \| fine	40.25 \| good	58.252 \| fine	0.94 \| good	3.489 \| good	0.238 \| good
2025-06-05T20:00:00.000Z	67 \| moderate	18.029 \| fine	52.617 \| good	59.219 \| fine	0.479 \| good	4.64 \| good	0.249 \| good
2025-06-05T21:00:00.000Z	74 \| moderate	17.866 \| fine	67.184 \| fine	62.373 \| fine	0.809 \| good	4.747 \| good	0.249 \| good
2025-06-05T22:00:00.000Z	84 \| moderate	18.641 \| fine	46.03 \| good	65.103 \| fine	0.733 \| good	4.951 \| good	0.261 \| good
2025-06-05T23:00:00.000Z	84 \| moderate	19.07 \| fine	72.895 \| fine	64.948 \| fine	0.761 \| good	4.793 \| good	0.261 \| good
2025-06-06T00:00:00.000Z	71 \| moderate	20.498 \| fine	73.363 \| fine	60.123 \| fine	0.769 \| good	6.042 \| good	0.279 \| good
2025-06-06T01:00:00.000Z	73 \| moderate	20.513 \| fine	85.566 \| fine	56.996 \| fine	0.713 \| good	6.842 \| good	0.279 \| good
2025-06-06T02:00:00.000Z	69 \| moderate	19.184 \| fine	65.065 \| fine	49.231 \| good	0.768 \| good	7.553 \| good	0.279 \| good
2025-06-06T03:00:00.000Z	69 \| moderate	19.192 \| fine	73.034 \| fine	50.53 \| good	0.782 \| good	18.954 \| good	0.312 \| good
2025-06-06T04:00:00.000Z	69 \| moderate	18.852 \| fine	82.6 \| fine	47.201 \| good	0.813 \| good	10.246 \| good	0.32 \| good
2025-06-06T05:00:00.000Z	67 \| moderate	18.226 \| fine	32.541 \| good	53.278 \| good	0.792 \| good	11.552 \| good	0.273 \| good
2025-06-06T06:00:00.000Z	66 \| moderate	17.386 \| fine	66.719 \| fine	56.865 \| fine	0.802 \| good	15.888 \| good	0.196 \| good
2025-06-06T07:00:00.000Z	71 \| moderate	19.618 \| fine	31.083 \| good	43.703 \| good	0.832 \| good	11.429 \| good	0.233 \| good
2025-06-06T08:00:00.000Z	69 \| moderate	18.947 \| fine	65.754 \| fine	42.498 \| good	0.779 \| good	13.843 \| good	0.207 \| good
2025-06-06T09:00:00.000Z	67 \| moderate	18.268 \| fine	55.32 \| fine	38.836 \| good	0.861 \| good	3.674 \| good	0.238 \| good
2025-06-06T10:00:00.000Z	66 \| moderate	16.883 \| fine	51.737 \| good	38.605 \| good	0.872 \| good	3.573 \| good	0.212 \| good
2025-06-06T11:00:00.000Z	67 \| moderate	18.03 \| fine	43.175 \| good	35.4 \| good	0.864 \| good	4.726 \| good	0.201 \| good
2025-06-06T12:00:00.000Z	67 \| moderate	18.258 \| fine	64.264 \| fine	33.225 \| good	0.897 \| good	5.145 \| good	0.234 \| good
2025-06-06T13:00:00.000Z	60 \| moderate	14.051 \| fine	53.111 \| good	28.136 \| good	0.87 \| good	5.897 \| good	0.244 \| good
2025-06-06T14:00:00.000Z	56 \| moderate	12.309 \| fine	33.436 \| good	38.775 \| good	0.868 \| good	7.809 \| good	0.201 \| good
2025-06-06T15:00:00.000Z	58 \| moderate	13.086 \| fine	41.699 \| good	41.661 \| good	0.795 \| good	5.568 \| good	0.201 \| good
2025-06-06T16:00:00.000Z	60 \| moderate	13.668 \| fine	35.54 \| good	38.955 \| good	0.527 \| good	5.995 \| good	0.201 \| good
2025-06-06T17:00:00.000Z	56 \| moderate	11.712 \| good	25.228 \| good	45.034 \| good	0.461 \| good	5.085 \| good	0.189 \| good
2025-06-06T18:00:00.000Z	58 \| moderate	12.767 \| fine	30.123 \| good	51.614 \| good	0.722 \| good	5.958 \| good	0.201 \| good
2025-06-06T19:00:00.000Z	58 \| moderate	12.671 \| fine	46.543 \| good	47.787 \| good	0.716 \| good	6.351 \| good	0.292 \| good
2025-06-06T20:00:00.000Z	64 \| moderate	16.127 \| fine	62.751 \| fine	55.043 \| fine	0.844 \| good	5.559 \| good	0.248 \| good
2025-06-06T21:00:00.000Z	64 \| moderate	16.314 \| fine	50.829 \| good	58.437 \| fine	0.999 \| good	7.026 \| good	0.278 \| good
2025-06-06T22:00:00.000Z	67 \| moderate	15.263 \| fine	64.922 \| fine	60.216 \| fine	0.715 \| good	5.748 \| good	0.259 \| good
2025-06-06T23:00:00.000Z	62 \| moderate	14.61 \| fine	63.355 \| fine	52.634 \| good	0.97 \| good	7.645 \| good	0.248 \| good
2025-06-07T00:00:00.000Z	62 \| moderate	14.932 \| fine	56.81 \| fine	43.289 \| good	0.893 \| good	7.018 \| good	0.259 \| good
2025-06-07T01:00:00.000Z	56 \| moderate	12.212 \| fine	56.204 \| fine	36.412 \| good	0.626 \| good	5.434 \| good	0.282 \| good
2025-06-07T02:00:00.000Z	58 \| moderate	13.089 \| fine	53.472 \| good	39.645 \| good	0.804 \| good	5.164 \| good	0.283 \| good
2025-06-07T03:00:00.000Z	56 \| moderate	11.893 \| good	47.654 \| good	33.714 \| good	0.894 \| good	7.218 \| good	0.245 \| good
2025-06-07T04:00:00.000Z	67 \| moderate	17.621 \| fine	64.485 \| fine	37.382 \| good	0.924 \| good	4.335 \| good	0.208 \| good
2025-06-07T05:00:00.000Z	60 \| moderate	9.966 \| good	73.998 \| fine	33.277 \| good	1.06 \| good	5.369 \| good	0.134 \| good
2025-06-07T06:00:00.000Z	49 \| good	8.836 \| good	29.576 \| good	35.942 \| good	1.046 \| good	6.803 \| good	0.134 \| good
2025-06-07T07:00:00.000Z	56 \| moderate	7.074 \| good	65.826 \| fine	32.111 \| good	0.817 \| good	5.407 \| good	0.173 \| good
2025-06-07T08:00:00.000Z	60 \| moderate	13.548 \| fine	40.74 \| good	26.45 \| good	0.886 \| good	5.333 \| good	0.173 \| good
2025-06-07T09:00:00.000Z	58 \| moderate	13.399 \| fine	37.323 \| good	26.413 \| good	0.908 \| good	4.983 \| good	0.212 \| good
2025-06-07T10:00:00.000Z	54 \| moderate	10.669 \| good	36.33 \| good	27.571 \| good	0.912 \| good	6.454 \| good	0.189 \| good
2025-06-07T11:00:00.000Z	56 \| moderate	12.35 \| fine	52.212 \| good	27.607 \| good	0.839 \| good	3.948 \| good	0.174 \| good
2025-06-07T12:00:00.000Z	52 \| moderate	10.399 \| good	32.93 \| good	18.162 \| good	0.909 \| good	2.899 \| good	0.174 \| good
2025-06-07T13:00:00.000Z	49 \| good	9.293 \| good	24.537 \| good	15.74 \| good	0.888 \| good	4.476 \| good	0.23 \| good
2025-06-07T14:00:00.000Z	44 \| good	7.984 \| good	24.989 \| good	17.137 \| good	0.98 \| good	4.032 \| good	0.23 \| good
2025-06-07T15:00:00.000Z	54 \| moderate	11.049 \| good	22.022 \| good	22.015 \| good	0.95 \| good	4.278 \| good	0.252 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	10.871 \| good	46.406 \| good	21.026 \| good	0.937 \| good	6.076 \| good	0.219 \| good
2025-06-07T14:00:00.000Z	49 \| good	9.293 \| good	24.537 \| good	15.74 \| good	0.888 \| good	4.476 \| good	0.23 \| good
2025-06-07T15:00:00.000Z	49 \| good	9.392 \| good	42.007 \| good	27.153 \| good	0.369 \| good	2.539 \| good	0.24 \| good
2025-06-07T16:00:00.000Z	49 \| good	9.415 \| good	41.851 \| good	27.499 \| good	0.317 \| good	2.163 \| good	0.213 \| good
2025-06-07T17:00:00.000Z	49 \| good	8.77 \| good	38.576 \| good	29.405 \| good	0.327 \| good	2.278 \| good	0.214 \| good
2025-06-07T18:00:00.000Z	33 \| good	6.445 \| good	28.794 \| good	35.99 \| good	0.337 \| good	2.393 \| good	0.216 \| good
2025-06-07T19:00:00.000Z	35 \| good	4.998 \| good	21.337 \| good	38.499 \| good	0.312 \| good	2.751 \| good	0.232 \| good
2025-06-07T20:00:00.000Z	35 \| good	5.746 \| good	24.817 \| good	38.137 \| good	0.357 \| good	3.107 \| good	0.233 \| good
2025-06-07T21:00:00.000Z	37 \| good	5.976 \| good	26.291 \| good	40.245 \| good	0.402 \| good	3.462 \| good	0.233 \| good
2025-06-07T22:00:00.000Z	40 \| good	5.669 \| good	24.169 \| good	42.977 \| good	0.277 \| good	4.751 \| good	0.281 \| good
2025-06-07T23:00:00.000Z	38 \| good	6.569 \| good	29.372 \| good	39.333 \| good	0.343 \| good	5.446 \| good	0.28 \| good
2025-06-08T00:00:00.000Z	36 \| good	5.533 \| good	23.705 \| good	39.298 \| good	0.409 \| good	6.14 \| good	0.279 \| good
2025-06-08T01:00:00.000Z	33 \| good	5.562 \| good	23.821 \| good	34.615 \| good	0.339 \| good	3.768 \| good	0.316 \| good
2025-06-08T02:00:00.000Z	33 \| good	6.271 \| good	27.956 \| good	32.51 \| good	0.396 \| good	4.34 \| good	0.312 \| good
2025-06-08T03:00:00.000Z	38 \| good	6.707 \| good	30 \| good	31.446 \| good	0.452 \| good	4.911 \| good	0.308 \| good
2025-06-08T04:00:00.000Z	38 \| good	7.343 \| good	32.04 \| good	30.387 \| good	0.379 \| good	2.716 \| good	0.329 \| good
2025-06-08T05:00:00.000Z	44 \| good	8.086 \| good	35.498 \| good	27.912 \| good	0.412 \| good	3.108 \| good	0.33 \| good
2025-06-08T06:00:00.000Z	49 \| good	8.701 \| good	38.19 \| good	25.013 \| good	0.445 \| good	3.499 \| good	0.33 \| good
2025-06-08T07:00:00.000Z	49 \| good	8.798 \| good	38.722 \| good	23.197 \| good	0.38 \| good	1.845 \| good	0.29 \| good
2025-06-08T08:00:00.000Z	49 \| good	8.651 \| good	37.787 \| good	22.826 \| good	0.412 \| good	2.088 \| good	0.294 \| good
2025-06-08T09:00:00.000Z	52 \| moderate	10.291 \| good	45.886 \| good	19.024 \| good	0.445 \| good	2.332 \| good	0.299 \| good
2025-06-08T10:00:00.000Z	54 \| moderate	11.078 \| good	49.194 \| good	20.096 \| good	0.372 \| good	1.854 \| good	0.273 \| good
2025-06-08T11:00:00.000Z	56 \| moderate	12.261 \| fine	55.235 \| fine	20.859 \| good	0.426 \| good	2.076 \| good	0.28 \| good
2025-06-08T12:00:00.000Z	56 \| moderate	12.222 \| fine	55.177 \| fine	25.269 \| good	0.48 \| good	2.298 \| good	0.287 \| good
2025-06-08T13:00:00.000Z	49 \| good	9.264 \| good	41.26 \| good	29.886 \| good	0.452 \| good	1.42 \| good	0.27 \| good
2025-06-08T14:00:00.000Z	49 \| good	9.257 \| good	40.909 \| good	33.586 \| good	0.486 \| good	1.554 \| good	0.269 \| good
2025-06-08T15:00:00.000Z	56 \| moderate	11.585 \| good	51.233 \| good	35.027 \| good	0.52 \| good	1.688 \| good	0.268 \| good
2025-06-08T16:00:00.000Z	60 \| moderate	13.681 \| fine	61.729 \| fine	36.841 \| good	0.432 \| good	1.234 \| good	0.254 \| good
2025-06-08T17:00:00.000Z	64 \| moderate	15.559 \| fine	69.735 \| fine	39 \| good	0.464 \| good	1.344 \| good	0.251 \| good
2025-06-08T18:00:00.000Z	67 \| moderate	17.542 \| fine	77.793 \| fine	41.395 \| good	0.497 \| good	1.453 \| good	0.249 \| good
2025-06-08T19:00:00.000Z	71 \| moderate	19.502 \| fine	85.86 \| fine	44.593 \| good	0.502 \| good	2.249 \| good	0.261 \| good
2025-06-08T20:00:00.000Z	71 \| moderate	20.458 \| fine	90.018 \| fine	45.923 \| good	0.52 \| good	2.396 \| good	0.263 \| good
2025-06-08T21:00:00.000Z	71 \| moderate	20.309 \| fine	89.408 \| fine	44.985 \| good	0.538 \| good	2.543 \| good	0.265 \| good
2025-06-08T22:00:00.000Z	73 \| moderate	20.784 \| fine	91.479 \| fine	41.62 \| good	0.58 \| good	4.174 \| good	0.29 \| good
2025-06-08T23:00:00.000Z	75 \| moderate	22.093 \| fine	96.827 \| fine	37.537 \| good	0.607 \| good	4.529 \| good	0.293 \| good
2025-06-09T00:00:00.000Z	71 \| moderate	20.425 \| fine	90.19 \| fine	33.481 \| good	0.633 \| good	4.885 \| good	0.296 \| good
2025-06-09T01:00:00.000Z	71 \| moderate	20.313 \| fine	88.962 \| fine	29.486 \| good	0.591 \| good	4.361 \| good	0.293 \| good
2025-06-09T02:00:00.000Z	71 \| moderate	20.341 \| fine	89.086 \| fine	27.074 \| good	0.629 \| good	4.896 \| good	0.296 \| good
2025-06-09T03:00:00.000Z	71 \| moderate	19.795 \| fine	86.952 \| fine	26.089 \| good	0.666 \| good	5.431 \| good	0.299 \| good
2025-06-09T04:00:00.000Z	69 \| moderate	18.781 \| fine	82.471 \| fine	26.158 \| good	0.579 \| good	3.05 \| good	0.276 \| good
2025-06-09T05:00:00.000Z	67 \| moderate	18.343 \| fine	81.197 \| fine	24.039 \| good	0.609 \| good	3.298 \| good	0.279 \| good
2025-06-09T06:00:00.000Z	66 \| moderate	16.909 \| fine	75.133 \| fine	24.521 \| good	0.639 \| good	3.546 \| good	0.282 \| good
2025-06-09T07:00:00.000Z	58 \| moderate	13.493 \| fine	60.48 \| fine	27.378 \| good	0.537 \| good	1.971 \| good	0.262 \| good
2025-06-09T08:00:00.000Z	58 \| moderate	12.71 \| fine	57.144 \| fine	26.803 \| good	0.564 \| good	2.052 \| good	0.262 \| good
2025-06-09T09:00:00.000Z	58 \| moderate	12.743 \| fine	57 \| fine	22.233 \| good	0.591 \| good	2.133 \| good	0.263 \| good
2025-06-09T10:00:00.000Z	56 \| moderate	12.133 \| fine	54.572 \| good	22.557 \| good	0.452 \| good	2.677 \| good	0.252 \| good
2025-06-09T11:00:00.000Z	56 \| moderate	12.235 \| fine	55.178 \| fine	23.895 \| good	0.485 \| good	2.927 \| good	0.253 \| good
2025-06-09T12:00:00.000Z	58 \| moderate	12.776 \| fine	57.379 \| fine	26.842 \| good	0.518 \| good	3.178 \| good	0.253 \| good
2025-06-09T13:00:00.000Z	60 \| moderate	14.137 \| fine	63.601 \| fine	29.946 \| good	0.356 \| good	3.189 \| good	0.226 \| good
2025-06-09T14:00:00.000Z	62 \| moderate	15.384 \| fine	68.992 \| fine	33.116 \| good	0.399 \| good	3.467 \| good	0.222 \| good

Current air quality index in Leominster, Massachusetts today

Major air pollutants in Leominster, Massachusetts

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Real-time air quality map: Monitor AQI near Leominster, Massachusetts

Air quality in nearby cities

Fitchburg, Massachusetts

Lunenburg, Massachusetts

Clinton, Massachusetts

Groton, Massachusetts

Littleton, Massachusetts

Gardner, Massachusetts

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Frequently asked questions

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What is the PM2.5 concentration in Leominster, Massachusetts right now?

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What is the current level of carbon monoxide (CO) in Leominster, Massachusetts?

What is the current level of sulfur dioxide (SO2) in Leominster, Massachusetts?

What is the current level of ozone (O3) in Leominster, Massachusetts?

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Leominster, Massachusetts right now?

What is the current level of PM₁₀ in Leominster, Massachusetts?

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What is the current level of ozone (O₃) in Leominster, Massachusetts?

What is the current level of nitrogen dioxide (NO₂) in Leominster, Massachusetts?