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

Leominster, Massachusetts currently has a PM10 concentration of 2.985 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Leominster, Massachusetts is 0.767 ppb.

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

Leominster, Massachusetts currently has an ozone (O3) concentration of 21.003 ppm.

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

The current level of nitrogen dioxide (NO2) in Leominster, Massachusetts is 4.927 ppb.

Current air quality index in Leominster, Massachusetts today

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

Leominster, Massachusetts currently has a PM2.5 concentration of 0.677 μg/m3.

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)

Common air pollutants in Leominster, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

0.68 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

2.98 μg/m³

155

255

425

605+

Ozone (O₃)

21.00 ppb

201

201+

Sulfur Dioxide (SO₂)

0.77 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.93 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 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
2026-09-27T00:00:00.000Z	32 \| good	3.428 \| good	9.402 \| good	34.712 \| good	0.611 \| good	0.911 \| good	0.16 \| good
2026-09-27T01:00:00.000Z	31 \| good	3.485 \| good	9.416 \| good	33.246 \| good	0.624 \| good	0.898 \| good	0.16 \| good
2026-09-27T02:00:00.000Z	32 \| good	3.68 \| good	14.562 \| good	34.974 \| good	0.648 \| good	2.054 \| good	0.138 \| good
2026-09-27T03:00:00.000Z	27 \| good	1.092 \| good	4.1 \| good	28.976 \| good	0.156 \| good	1.088 \| good	0.134 \| good
2026-09-27T04:00:00.000Z	30 \| good	3.676 \| good	9.764 \| good	32.407 \| good	0.745 \| good	2.845 \| good	0.16 \| good
2026-09-27T05:00:00.000Z	30 \| good	3.134 \| good	7.538 \| good	32.113 \| good	0.687 \| good	2.39 \| good	0.16 \| good
2026-09-27T06:00:00.000Z	29 \| good	2.162 \| good	8.887 \| good	30.504 \| good	0.709 \| good	2.383 \| good	0.138 \| good
2026-09-27T07:00:00.000Z	28 \| good	2.182 \| good	6.208 \| good	29.549 \| good	0.709 \| good	2.381 \| good	0.138 \| good
2026-09-27T08:00:00.000Z	28 \| good	1.263 \| good	4.814 \| good	29.995 \| good	0.696 \| good	0.724 \| good	0.138 \| good
2026-09-27T09:00:00.000Z	28 \| good	1.267 \| good	5.25 \| good	30.225 \| good	0.696 \| good	1.909 \| good	0.138 \| good
2026-09-27T10:00:00.000Z	28 \| good	0.845 \| good	3.144 \| good	30.129 \| good	0.68 \| good	2.225 \| good	0.138 \| good
2026-09-27T11:00:00.000Z	29 \| good	0.732 \| good	3.329 \| good	30.682 \| good	0.709 \| good	2.321 \| good	0.138 \| good
2026-09-27T12:00:00.000Z	28 \| good	0.726 \| good	3.118 \| good	30.119 \| good	0.716 \| good	0.656 \| good	0.138 \| good
2026-09-27T13:00:00.000Z	29 \| good	0.652 \| good	3.578 \| good	30.568 \| good	0.716 \| good	2.29 \| good	0.138 \| good
2026-09-27T14:00:00.000Z	27 \| good	0.671 \| good	2.871 \| good	28.673 \| good	0.716 \| good	1.061 \| good	0.138 \| good
2026-09-27T15:00:00.000Z	29 \| good	0.617 \| good	1.884 \| good	30.633 \| good	0.571 \| good	1.066 \| good	0.166 \| good
2026-09-27T16:00:00.000Z	28 \| good	0.501 \| good	1.618 \| good	30.343 \| good	0.727 \| good	1.39 \| good	0.166 \| good
2026-09-27T17:00:00.000Z	30 \| good	0.563 \| good	1.386 \| good	31.587 \| good	0.696 \| good	1.106 \| good	0.166 \| good
2026-09-27T18:00:00.000Z	30 \| good	0.534 \| good	2.179 \| good	31.612 \| good	0.737 \| good	1.651 \| good	0.166 \| good
2026-09-27T19:00:00.000Z	29 \| good	0.707 \| good	2.514 \| good	30.945 \| good	0.611 \| good	1.271 \| good	0.166 \| good
2026-09-27T20:00:00.000Z	29 \| good	0.896 \| good	4.192 \| good	30.977 \| good	0.71 \| good	1.29 \| good	0.166 \| good
2026-09-27T21:00:00.000Z	28 \| good	1.165 \| good	4.219 \| good	30.009 \| good	0.658 \| good	1.373 \| good	0.166 \| good
2026-09-27T22:00:00.000Z	29 \| good	0.769 \| good	3.441 \| good	30.63 \| good	0.706 \| good	1.27 \| good	0.166 \| good
2026-09-27T23:00:00.000Z	24 \| good	0.946 \| good	2.503 \| good	26.006 \| good	0.696 \| good	0.99 \| good	0.166 \| good
2026-09-28T00:00:00.000Z	25 \| good	0.991 \| good	4.331 \| good	27.409 \| good	0.678 \| good	0.981 \| good	0.166 \| good
2026-09-28T01:00:00.000Z	27 \| good	1.496 \| good	5.063 \| good	29.269 \| good	0.707 \| good	0.933 \| good	0.138 \| good
2026-09-28T02:00:00.000Z	28 \| good	1.571 \| good	4.359 \| good	29.6 \| good	0.68 \| good	0.765 \| good	0.138 \| good
2026-09-28T03:00:00.000Z	26 \| good	3.698 \| good	15.986 \| good	27.595 \| good	0.158 \| good	1.789 \| good	0.131 \| good
2026-09-28T04:00:00.000Z	26 \| good	1.3 \| good	3.003 \| good	28.24 \| good	0.729 \| good	1.339 \| good	0.138 \| good
2026-09-28T05:00:00.000Z	27 \| good	1.479 \| good	2.091 \| good	28.971 \| good	0.711 \| good	1.337 \| good	0.138 \| good
2026-09-28T06:00:00.000Z	27 \| good	1.726 \| good	6.228 \| good	29.134 \| good	0.709 \| good	1.174 \| good	0.138 \| good
2026-09-28T07:00:00.000Z	27 \| good	1.792 \| good	5.838 \| good	28.751 \| good	0.709 \| good	1.18 \| good	0.138 \| good
2026-09-28T08:00:00.000Z	28 \| good	1.516 \| good	5.095 \| good	29.691 \| good	0.72 \| good	0.847 \| good	0.138 \| good
2026-09-28T09:00:00.000Z	28 \| good	1.135 \| good	5.558 \| good	30.322 \| good	0.692 \| good	0.799 \| good	0.138 \| good
2026-09-28T10:00:00.000Z	28 \| good	0.886 \| good	5.859 \| good	29.981 \| good	0.574 \| good	1.815 \| good	0.138 \| good
2026-09-28T11:00:00.000Z	27 \| good	1.071 \| good	5.114 \| good	28.772 \| good	0.709 \| good	2.097 \| good	0.166 \| good
2026-09-28T12:00:00.000Z	26 \| good	0.708 \| good	2.134 \| good	28.067 \| good	0.67 \| good	2.237 \| good	0.166 \| good
2026-09-28T13:00:00.000Z	25 \| good	0.959 \| good	2.021 \| good	26.582 \| good	0.67 \| good	2.18 \| good	0.166 \| good
2026-09-28T14:00:00.000Z	24 \| good	0.61 \| good	3.854 \| good	25.692 \| good	0.611 \| good	2.874 \| good	0.207 \| good
2026-09-28T15:00:00.000Z	24 \| good	0.799 \| good	2.45 \| good	25.947 \| good	0.57 \| good	2.34 \| good	0.191 \| good
2026-09-28T16:00:00.000Z	24 \| good	0.748 \| good	2.142 \| good	25.511 \| good	0.594 \| good	1.932 \| good	0.178 \| good
2026-09-28T17:00:00.000Z	24 \| good	0.624 \| good	2.303 \| good	25.955 \| good	0.8 \| good	2.42 \| good	0.178 \| good
2026-09-28T18:00:00.000Z	22 \| good	0.665 \| good	2.834 \| good	24.36 \| good	0.787 \| good	2.621 \| good	0.178 \| good
2026-09-28T19:00:00.000Z	21 \| good	0.98 \| good	3.624 \| good	23.272 \| good	0.569 \| good	2.361 \| good	0.191 \| good
2026-09-28T20:00:00.000Z	21 \| good	0.65 \| good	3.23 \| good	23.362 \| good	0.818 \| good	4.982 \| good	0.191 \| good
2026-09-28T21:00:00.000Z	19 \| good	0.59 \| good	2.405 \| good	21.396 \| good	0.551 \| good	5.405 \| good	0.191 \| good
2026-09-28T22:00:00.000Z	19 \| good	0.66 \| good	2.73 \| good	20.557 \| good	0.786 \| good	5.016 \| good	0.191 \| good
2026-09-28T23:00:00.000Z	19 \| good	0.677 \| good	2.985 \| good	21.003 \| good	0.767 \| good	4.927 \| good	0.214 \| good
2026-09-29T00:00:00.000Z	23 \| good	2.533 \| good	10.114 \| good	24.922 \| good	0.195 \| good	4.587 \| good	0.166 \| good
2026-09-29T01:00:00.000Z	21 \| good	2.786 \| good	11.608 \| good	23.08 \| good	0.209 \| good	4.694 \| good	0.167 \| good
2026-09-29T02:00:00.000Z	19 \| good	2.963 \| good	12.021 \| good	21.342 \| good	0.226 \| good	4.031 \| good	0.16 \| good
2026-09-29T03:00:00.000Z	19 \| good	3.042 \| good	12.203 \| good	21.059 \| good	0.231 \| good	3.809 \| good	0.158 \| good
2026-09-29T04:00:00.000Z	20 \| good	2.797 \| good	11.666 \| good	22.295 \| good	0.222 \| good	3.315 \| good	0.156 \| good
2026-09-29T05:00:00.000Z	21 \| good	2.543 \| good	10.058 \| good	22.963 \| good	0.209 \| good	2.84 \| good	0.153 \| good
2026-09-29T06:00:00.000Z	22 \| good	2.465 \| good	10 \| good	23.579 \| good	0.194 \| good	2.486 \| good	0.15 \| good
2026-09-29T07:00:00.000Z	21 \| good	2.826 \| good	11.942 \| good	23.388 \| good	0.18 \| good	2.263 \| good	0.148 \| good
2026-09-29T08:00:00.000Z	19 \| good	3.102 \| good	13.576 \| good	21.377 \| good	0.166 \| good	2.152 \| good	0.146 \| good
2026-09-29T09:00:00.000Z	17 \| good	3.212 \| good	14 \| good	18.066 \| good	0.153 \| good	2.19 \| good	0.146 \| good
2026-09-29T10:00:00.000Z	16 \| good	3.386 \| good	14.964 \| good	16.94 \| good	0.144 \| good	2.475 \| good	0.148 \| good
2026-09-29T11:00:00.000Z	16 \| good	3.497 \| good	15.54 \| good	16.504 \| good	0.152 \| good	3.444 \| good	0.158 \| good
2026-09-29T12:00:00.000Z	16 \| good	3.345 \| good	14.704 \| good	17.328 \| good	0.158 \| good	3.807 \| good	0.171 \| good
2026-09-29T13:00:00.000Z	21 \| good	3.032 \| good	12.178 \| good	22.523 \| good	0.158 \| good	2.633 \| good	0.165 \| good
2026-09-29T14:00:00.000Z	24 \| good	2.636 \| good	11.025 \| good	25.92 \| good	0.165 \| good	1.796 \| good	0.159 \| good
2026-09-29T15:00:00.000Z	25 \| good	2.647 \| good	10.969 \| good	26.945 \| good	0.173 \| good	1.255 \| good	0.15 \| good
2026-09-29T16:00:00.000Z	25 \| good	2.877 \| good	12.124 \| good	26.86 \| good	0.185 \| good	1.081 \| good	0.146 \| good
2026-09-29T17:00:00.000Z	26 \| good	3.211 \| good	14.073 \| good	27.501 \| good	0.197 \| good	1.054 \| good	0.146 \| good
2026-09-29T18:00:00.000Z	27 \| good	3.342 \| good	14.427 \| good	28.84 \| good	0.213 \| good	1.071 \| good	0.147 \| good
2026-09-29T19:00:00.000Z	27 \| good	3.374 \| good	15 \| good	29.49 \| good	0.236 \| good	1.152 \| good	0.149 \| good
2026-09-29T20:00:00.000Z	28 \| good	3.263 \| good	14.126 \| good	30.008 \| good	0.268 \| good	1.267 \| good	0.151 \| good
2026-09-29T21:00:00.000Z	28 \| good	2.941 \| good	12.139 \| good	29.602 \| good	0.303 \| good	1.803 \| good	0.158 \| good
2026-09-29T22:00:00.000Z	26 \| good	2.554 \| good	10.211 \| good	27.72 \| good	0.337 \| good	3.169 \| good	0.171 \| good
2026-09-29T23:00:00.000Z	23 \| good	2.868 \| good	11.968 \| good	25.006 \| good	0.381 \| good	5.503 \| good	0.19 \| good
2026-09-30T00:00:00.000Z	25 \| good	3.919 \| good	17.265 \| good	26.579 \| good	0.425 \| good	6.171 \| good	0.196 \| good
2026-09-30T01:00:00.000Z	25 \| good	3.854 \| good	16.906 \| good	26.645 \| good	0.469 \| good	5.912 \| good	0.193 \| good
2026-09-30T02:00:00.000Z	24 \| good	4.067 \| good	17.898 \| good	26.038 \| good	0.515 \| good	5.597 \| good	0.189 \| good
2026-09-30T03:00:00.000Z	23 \| good	3.986 \| good	17.115 \| good	24.872 \| good	0.548 \| good	5.361 \| good	0.188 \| good
2026-09-30T04:00:00.000Z	22 \| good	4.132 \| good	18 \| good	23.931 \| good	0.558 \| good	4.992 \| good	0.186 \| good
2026-09-30T05:00:00.000Z	22 \| good	4.041 \| good	17.788 \| good	20.872 \| good	0.555 \| good	4.707 \| good	0.185 \| good
2026-09-30T06:00:00.000Z	22 \| good	4.237 \| good	18.694 \| good	20.152 \| good	0.542 \| good	4.636 \| good	0.184 \| good
2026-09-30T07:00:00.000Z	27 \| good	5.09 \| good	21.903 \| good	19.468 \| good	0.524 \| good	4.78 \| good	0.185 \| good
2026-09-30T08:00:00.000Z	27 \| good	5.161 \| good	22.211 \| good	18.63 \| good	0.514 \| good	5.223 \| good	0.188 \| good
2026-09-30T09:00:00.000Z	22 \| good	4.002 \| good	17.269 \| good	15.31 \| good	0.511 \| good	5.529 \| good	0.191 \| good
2026-09-30T10:00:00.000Z	27 \| good	4.549 \| good	19.89 \| good	14.962 \| good	0.511 \| good	5.83 \| good	0.194 \| good
2026-09-30T11:00:00.000Z	27 \| good	4.84 \| good	20.979 \| good	16.445 \| good	0.526 \| good	6.526 \| good	0.205 \| good
2026-09-30T12:00:00.000Z	27 \| good	5.341 \| good	22.759 \| good	17.254 \| good	0.527 \| good	5.412 \| good	0.208 \| good
2026-09-30T13:00:00.000Z	27 \| good	4.8 \| good	20.698 \| good	20.883 \| good	0.515 \| good	3.991 \| good	0.203 \| good
2026-09-30T14:00:00.000Z	27 \| good	4.94 \| good	21.114 \| good	25.18 \| good	0.474 \| good	2.655 \| good	0.192 \| good
2026-09-30T15:00:00.000Z	28 \| good	4.773 \| good	20.759 \| good	29.927 \| good	0.391 \| good	1.523 \| good	0.173 \| good
2026-09-30T16:00:00.000Z	31 \| good	4.868 \| good	20.78 \| good	32.549 \| good	0.325 \| good	1.119 \| good	0.162 \| good
2026-09-30T17:00:00.000Z	31 \| good	4.592 \| good	19.873 \| good	34.196 \| good	0.294 \| good	1.209 \| good	0.159 \| good
2026-09-30T18:00:00.000Z	32 \| good	4.12 \| good	17.842 \| good	35.493 \| good	0.284 \| good	1.172 \| good	0.158 \| good
2026-09-30T19:00:00.000Z	32 \| good	3.402 \| good	14.691 \| good	35.349 \| good	0.273 \| good	1.194 \| good	0.157 \| good
2026-09-30T20:00:00.000Z	30 \| good	3.537 \| good	15.593 \| good	32.183 \| good	0.271 \| good	1.51 \| good	0.159 \| good
2026-09-30T21:00:00.000Z	29 \| good	4.401 \| good	19.143 \| good	31.314 \| good	0.275 \| good	3.297 \| good	0.179 \| good
2026-09-30T22:00:00.000Z	27 \| good	3.926 \| good	16.839 \| good	29.08 \| good	0.318 \| good	7.595 \| good	0.225 \| good
2026-09-30T23:00:00.000Z	24 \| good	4.145 \| good	18.076 \| good	26.431 \| good	0.412 \| good	14.742 \| good	0.292 \| good

Leominster

Empower business decisions with accurate air quality data

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

0.22ppm

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 10:00:00, 2026-09-28.

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

The best air quality in Leominster, Massachusetts was observed at 10:00:00 on 2026-09-28.

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

The air quality in Leominster, Massachusetts right now is Good, with an AQI of 19.

What pollutant is most frequently found in Leominster, Massachusetts?

In Leominster, Massachusetts, O3 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 0.677 μg/m³.

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

Leominster, Massachusetts currently has a PM₁₀ concentration of 2.985 μg/m³.

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

The current carbon monoxide (CO) level in Leominster, Massachusetts is 0.214 ppm.

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

The current sulfur dioxide (SO₂) concentration in Leominster, Massachusetts is 0.767 ppb.

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

Leominster, Massachusetts currently has an ozone (O₃) concentration of 21.003 ppm.

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

The current level of nitrogen dioxide (NO₂) in Leominster, Massachusetts is 4.927 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-27T00:00:00.000Z	32 \| good	3.428 \| good	9.402 \| good	34.712 \| good	0.611 \| good	0.911 \| good	0.16 \| good
2026-09-27T01:00:00.000Z	31 \| good	3.485 \| good	9.416 \| good	33.246 \| good	0.624 \| good	0.898 \| good	0.16 \| good
2026-09-27T02:00:00.000Z	32 \| good	3.68 \| good	14.562 \| good	34.974 \| good	0.648 \| good	2.054 \| good	0.138 \| good
2026-09-27T03:00:00.000Z	27 \| good	1.092 \| good	4.1 \| good	28.976 \| good	0.156 \| good	1.088 \| good	0.134 \| good
2026-09-27T04:00:00.000Z	30 \| good	3.676 \| good	9.764 \| good	32.407 \| good	0.745 \| good	2.845 \| good	0.16 \| good
2026-09-27T05:00:00.000Z	30 \| good	3.134 \| good	7.538 \| good	32.113 \| good	0.687 \| good	2.39 \| good	0.16 \| good
2026-09-27T06:00:00.000Z	29 \| good	2.162 \| good	8.887 \| good	30.504 \| good	0.709 \| good	2.383 \| good	0.138 \| good
2026-09-27T07:00:00.000Z	28 \| good	2.182 \| good	6.208 \| good	29.549 \| good	0.709 \| good	2.381 \| good	0.138 \| good
2026-09-27T08:00:00.000Z	28 \| good	1.263 \| good	4.814 \| good	29.995 \| good	0.696 \| good	0.724 \| good	0.138 \| good
2026-09-27T09:00:00.000Z	28 \| good	1.267 \| good	5.25 \| good	30.225 \| good	0.696 \| good	1.909 \| good	0.138 \| good
2026-09-27T10:00:00.000Z	28 \| good	0.845 \| good	3.144 \| good	30.129 \| good	0.68 \| good	2.225 \| good	0.138 \| good
2026-09-27T11:00:00.000Z	29 \| good	0.732 \| good	3.329 \| good	30.682 \| good	0.709 \| good	2.321 \| good	0.138 \| good
2026-09-27T12:00:00.000Z	28 \| good	0.726 \| good	3.118 \| good	30.119 \| good	0.716 \| good	0.656 \| good	0.138 \| good
2026-09-27T13:00:00.000Z	29 \| good	0.652 \| good	3.578 \| good	30.568 \| good	0.716 \| good	2.29 \| good	0.138 \| good
2026-09-27T14:00:00.000Z	27 \| good	0.671 \| good	2.871 \| good	28.673 \| good	0.716 \| good	1.061 \| good	0.138 \| good
2026-09-27T15:00:00.000Z	29 \| good	0.617 \| good	1.884 \| good	30.633 \| good	0.571 \| good	1.066 \| good	0.166 \| good
2026-09-27T16:00:00.000Z	28 \| good	0.501 \| good	1.618 \| good	30.343 \| good	0.727 \| good	1.39 \| good	0.166 \| good
2026-09-27T17:00:00.000Z	30 \| good	0.563 \| good	1.386 \| good	31.587 \| good	0.696 \| good	1.106 \| good	0.166 \| good
2026-09-27T18:00:00.000Z	30 \| good	0.534 \| good	2.179 \| good	31.612 \| good	0.737 \| good	1.651 \| good	0.166 \| good
2026-09-27T19:00:00.000Z	29 \| good	0.707 \| good	2.514 \| good	30.945 \| good	0.611 \| good	1.271 \| good	0.166 \| good
2026-09-27T20:00:00.000Z	29 \| good	0.896 \| good	4.192 \| good	30.977 \| good	0.71 \| good	1.29 \| good	0.166 \| good
2026-09-27T21:00:00.000Z	28 \| good	1.165 \| good	4.219 \| good	30.009 \| good	0.658 \| good	1.373 \| good	0.166 \| good
2026-09-27T22:00:00.000Z	29 \| good	0.769 \| good	3.441 \| good	30.63 \| good	0.706 \| good	1.27 \| good	0.166 \| good
2026-09-27T23:00:00.000Z	24 \| good	0.946 \| good	2.503 \| good	26.006 \| good	0.696 \| good	0.99 \| good	0.166 \| good
2026-09-28T00:00:00.000Z	25 \| good	0.991 \| good	4.331 \| good	27.409 \| good	0.678 \| good	0.981 \| good	0.166 \| good
2026-09-28T01:00:00.000Z	27 \| good	1.496 \| good	5.063 \| good	29.269 \| good	0.707 \| good	0.933 \| good	0.138 \| good
2026-09-28T02:00:00.000Z	28 \| good	1.571 \| good	4.359 \| good	29.6 \| good	0.68 \| good	0.765 \| good	0.138 \| good
2026-09-28T03:00:00.000Z	26 \| good	3.698 \| good	15.986 \| good	27.595 \| good	0.158 \| good	1.789 \| good	0.131 \| good
2026-09-28T04:00:00.000Z	26 \| good	1.3 \| good	3.003 \| good	28.24 \| good	0.729 \| good	1.339 \| good	0.138 \| good
2026-09-28T05:00:00.000Z	27 \| good	1.479 \| good	2.091 \| good	28.971 \| good	0.711 \| good	1.337 \| good	0.138 \| good
2026-09-28T06:00:00.000Z	27 \| good	1.726 \| good	6.228 \| good	29.134 \| good	0.709 \| good	1.174 \| good	0.138 \| good
2026-09-28T07:00:00.000Z	27 \| good	1.792 \| good	5.838 \| good	28.751 \| good	0.709 \| good	1.18 \| good	0.138 \| good
2026-09-28T08:00:00.000Z	28 \| good	1.516 \| good	5.095 \| good	29.691 \| good	0.72 \| good	0.847 \| good	0.138 \| good
2026-09-28T09:00:00.000Z	28 \| good	1.135 \| good	5.558 \| good	30.322 \| good	0.692 \| good	0.799 \| good	0.138 \| good
2026-09-28T10:00:00.000Z	28 \| good	0.886 \| good	5.859 \| good	29.981 \| good	0.574 \| good	1.815 \| good	0.138 \| good
2026-09-28T11:00:00.000Z	27 \| good	1.071 \| good	5.114 \| good	28.772 \| good	0.709 \| good	2.097 \| good	0.166 \| good
2026-09-28T12:00:00.000Z	26 \| good	0.708 \| good	2.134 \| good	28.067 \| good	0.67 \| good	2.237 \| good	0.166 \| good
2026-09-28T13:00:00.000Z	25 \| good	0.959 \| good	2.021 \| good	26.582 \| good	0.67 \| good	2.18 \| good	0.166 \| good
2026-09-28T14:00:00.000Z	24 \| good	0.61 \| good	3.854 \| good	25.692 \| good	0.611 \| good	2.874 \| good	0.207 \| good
2026-09-28T15:00:00.000Z	24 \| good	0.799 \| good	2.45 \| good	25.947 \| good	0.57 \| good	2.34 \| good	0.191 \| good
2026-09-28T16:00:00.000Z	24 \| good	0.748 \| good	2.142 \| good	25.511 \| good	0.594 \| good	1.932 \| good	0.178 \| good
2026-09-28T17:00:00.000Z	24 \| good	0.624 \| good	2.303 \| good	25.955 \| good	0.8 \| good	2.42 \| good	0.178 \| good
2026-09-28T18:00:00.000Z	22 \| good	0.665 \| good	2.834 \| good	24.36 \| good	0.787 \| good	2.621 \| good	0.178 \| good
2026-09-28T19:00:00.000Z	21 \| good	0.98 \| good	3.624 \| good	23.272 \| good	0.569 \| good	2.361 \| good	0.191 \| good
2026-09-28T20:00:00.000Z	21 \| good	0.65 \| good	3.23 \| good	23.362 \| good	0.818 \| good	4.982 \| good	0.191 \| good
2026-09-28T21:00:00.000Z	19 \| good	0.59 \| good	2.405 \| good	21.396 \| good	0.551 \| good	5.405 \| good	0.191 \| good
2026-09-28T22:00:00.000Z	19 \| good	0.66 \| good	2.73 \| good	20.557 \| good	0.786 \| good	5.016 \| good	0.191 \| good
2026-09-28T23:00:00.000Z	19 \| good	0.677 \| good	2.985 \| good	21.003 \| good	0.767 \| good	4.927 \| good	0.214 \| good
2026-09-29T00:00:00.000Z	23 \| good	2.533 \| good	10.114 \| good	24.922 \| good	0.195 \| good	4.587 \| good	0.166 \| good
2026-09-29T01:00:00.000Z	21 \| good	2.786 \| good	11.608 \| good	23.08 \| good	0.209 \| good	4.694 \| good	0.167 \| good
2026-09-29T02:00:00.000Z	19 \| good	2.963 \| good	12.021 \| good	21.342 \| good	0.226 \| good	4.031 \| good	0.16 \| good
2026-09-29T03:00:00.000Z	19 \| good	3.042 \| good	12.203 \| good	21.059 \| good	0.231 \| good	3.809 \| good	0.158 \| good
2026-09-29T04:00:00.000Z	20 \| good	2.797 \| good	11.666 \| good	22.295 \| good	0.222 \| good	3.315 \| good	0.156 \| good
2026-09-29T05:00:00.000Z	21 \| good	2.543 \| good	10.058 \| good	22.963 \| good	0.209 \| good	2.84 \| good	0.153 \| good
2026-09-29T06:00:00.000Z	22 \| good	2.465 \| good	10 \| good	23.579 \| good	0.194 \| good	2.486 \| good	0.15 \| good
2026-09-29T07:00:00.000Z	21 \| good	2.826 \| good	11.942 \| good	23.388 \| good	0.18 \| good	2.263 \| good	0.148 \| good
2026-09-29T08:00:00.000Z	19 \| good	3.102 \| good	13.576 \| good	21.377 \| good	0.166 \| good	2.152 \| good	0.146 \| good
2026-09-29T09:00:00.000Z	17 \| good	3.212 \| good	14 \| good	18.066 \| good	0.153 \| good	2.19 \| good	0.146 \| good
2026-09-29T10:00:00.000Z	16 \| good	3.386 \| good	14.964 \| good	16.94 \| good	0.144 \| good	2.475 \| good	0.148 \| good
2026-09-29T11:00:00.000Z	16 \| good	3.497 \| good	15.54 \| good	16.504 \| good	0.152 \| good	3.444 \| good	0.158 \| good
2026-09-29T12:00:00.000Z	16 \| good	3.345 \| good	14.704 \| good	17.328 \| good	0.158 \| good	3.807 \| good	0.171 \| good
2026-09-29T13:00:00.000Z	21 \| good	3.032 \| good	12.178 \| good	22.523 \| good	0.158 \| good	2.633 \| good	0.165 \| good
2026-09-29T14:00:00.000Z	24 \| good	2.636 \| good	11.025 \| good	25.92 \| good	0.165 \| good	1.796 \| good	0.159 \| good
2026-09-29T15:00:00.000Z	25 \| good	2.647 \| good	10.969 \| good	26.945 \| good	0.173 \| good	1.255 \| good	0.15 \| good
2026-09-29T16:00:00.000Z	25 \| good	2.877 \| good	12.124 \| good	26.86 \| good	0.185 \| good	1.081 \| good	0.146 \| good
2026-09-29T17:00:00.000Z	26 \| good	3.211 \| good	14.073 \| good	27.501 \| good	0.197 \| good	1.054 \| good	0.146 \| good
2026-09-29T18:00:00.000Z	27 \| good	3.342 \| good	14.427 \| good	28.84 \| good	0.213 \| good	1.071 \| good	0.147 \| good
2026-09-29T19:00:00.000Z	27 \| good	3.374 \| good	15 \| good	29.49 \| good	0.236 \| good	1.152 \| good	0.149 \| good
2026-09-29T20:00:00.000Z	28 \| good	3.263 \| good	14.126 \| good	30.008 \| good	0.268 \| good	1.267 \| good	0.151 \| good
2026-09-29T21:00:00.000Z	28 \| good	2.941 \| good	12.139 \| good	29.602 \| good	0.303 \| good	1.803 \| good	0.158 \| good
2026-09-29T22:00:00.000Z	26 \| good	2.554 \| good	10.211 \| good	27.72 \| good	0.337 \| good	3.169 \| good	0.171 \| good
2026-09-29T23:00:00.000Z	23 \| good	2.868 \| good	11.968 \| good	25.006 \| good	0.381 \| good	5.503 \| good	0.19 \| good
2026-09-30T00:00:00.000Z	25 \| good	3.919 \| good	17.265 \| good	26.579 \| good	0.425 \| good	6.171 \| good	0.196 \| good
2026-09-30T01:00:00.000Z	25 \| good	3.854 \| good	16.906 \| good	26.645 \| good	0.469 \| good	5.912 \| good	0.193 \| good
2026-09-30T02:00:00.000Z	24 \| good	4.067 \| good	17.898 \| good	26.038 \| good	0.515 \| good	5.597 \| good	0.189 \| good
2026-09-30T03:00:00.000Z	23 \| good	3.986 \| good	17.115 \| good	24.872 \| good	0.548 \| good	5.361 \| good	0.188 \| good
2026-09-30T04:00:00.000Z	22 \| good	4.132 \| good	18 \| good	23.931 \| good	0.558 \| good	4.992 \| good	0.186 \| good
2026-09-30T05:00:00.000Z	22 \| good	4.041 \| good	17.788 \| good	20.872 \| good	0.555 \| good	4.707 \| good	0.185 \| good
2026-09-30T06:00:00.000Z	22 \| good	4.237 \| good	18.694 \| good	20.152 \| good	0.542 \| good	4.636 \| good	0.184 \| good
2026-09-30T07:00:00.000Z	27 \| good	5.09 \| good	21.903 \| good	19.468 \| good	0.524 \| good	4.78 \| good	0.185 \| good
2026-09-30T08:00:00.000Z	27 \| good	5.161 \| good	22.211 \| good	18.63 \| good	0.514 \| good	5.223 \| good	0.188 \| good
2026-09-30T09:00:00.000Z	22 \| good	4.002 \| good	17.269 \| good	15.31 \| good	0.511 \| good	5.529 \| good	0.191 \| good
2026-09-30T10:00:00.000Z	27 \| good	4.549 \| good	19.89 \| good	14.962 \| good	0.511 \| good	5.83 \| good	0.194 \| good
2026-09-30T11:00:00.000Z	27 \| good	4.84 \| good	20.979 \| good	16.445 \| good	0.526 \| good	6.526 \| good	0.205 \| good
2026-09-30T12:00:00.000Z	27 \| good	5.341 \| good	22.759 \| good	17.254 \| good	0.527 \| good	5.412 \| good	0.208 \| good
2026-09-30T13:00:00.000Z	27 \| good	4.8 \| good	20.698 \| good	20.883 \| good	0.515 \| good	3.991 \| good	0.203 \| good
2026-09-30T14:00:00.000Z	27 \| good	4.94 \| good	21.114 \| good	25.18 \| good	0.474 \| good	2.655 \| good	0.192 \| good
2026-09-30T15:00:00.000Z	28 \| good	4.773 \| good	20.759 \| good	29.927 \| good	0.391 \| good	1.523 \| good	0.173 \| good
2026-09-30T16:00:00.000Z	31 \| good	4.868 \| good	20.78 \| good	32.549 \| good	0.325 \| good	1.119 \| good	0.162 \| good
2026-09-30T17:00:00.000Z	31 \| good	4.592 \| good	19.873 \| good	34.196 \| good	0.294 \| good	1.209 \| good	0.159 \| good
2026-09-30T18:00:00.000Z	32 \| good	4.12 \| good	17.842 \| good	35.493 \| good	0.284 \| good	1.172 \| good	0.158 \| good
2026-09-30T19:00:00.000Z	32 \| good	3.402 \| good	14.691 \| good	35.349 \| good	0.273 \| good	1.194 \| good	0.157 \| good
2026-09-30T20:00:00.000Z	30 \| good	3.537 \| good	15.593 \| good	32.183 \| good	0.271 \| good	1.51 \| good	0.159 \| good
2026-09-30T21:00:00.000Z	29 \| good	4.401 \| good	19.143 \| good	31.314 \| good	0.275 \| good	3.297 \| good	0.179 \| good
2026-09-30T22:00:00.000Z	27 \| good	3.926 \| good	16.839 \| good	29.08 \| good	0.318 \| good	7.595 \| good	0.225 \| good
2026-09-30T23:00:00.000Z	24 \| good	4.145 \| good	18.076 \| good	26.431 \| good	0.412 \| good	14.742 \| good	0.292 \| good

Current air quality index in Leominster, Massachusetts today

Common air pollutants in Leominster, Massachusetts

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Leominster, Massachusetts air quality forecast and history

Empower business decisions with accurate air quality data

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

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

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

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

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

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

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?

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

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?

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

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

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