What is the PM10 level in Portland, Maine at the moment?

The PM10 concentration in Portland, Maine is 45.551 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Portland, Maine at the moment?

Currently, Portland, Maine has a sulfur dioxide (SO2) concentration of 0.407 ppb.

What is the ozone (O3) level in Portland, Maine at the moment?

The current ozone (O3) level in Portland, Maine at the moment is 33.993 ppm.

What is the nitrogen dioxide (NO2) level in Portland, Maine at the moment?

Nitrogen dioxide (NO2) level in Portland, Maine at the moment is 4.87 ppb.

Live air quality index in Portland, Maine today

Q: What is the PM2.5 level in Portland, Maine at the moment?

PM2.5 levels in Portland, Maine are currently 11.301 μg/m3.

Stay updated with real-time air quality in Portland, Maine 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

Portland, Maine

Last updated: ... (Local time)

Major air pollutants in Portland, Maine

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

11.30 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

45.55 μg/m³

155

255

425

605+

Ozone (O₃)

33.99 ppb

201

201+

Sulfur Dioxide (SO₂)

0.41 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.87 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Portland, Maine

Scroll To Air Quality Map

Track live Portland, Maine air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-02-10T02:00:00.000Z	34 \| good	5.511 \| good	29.062 \| good	37.1 \| good	0.111 \| good	3.784 \| good	0.217 \| good
2026-02-10T03:00:00.000Z	34 \| good	5.531 \| good	24.93 \| good	37.099 \| good	0.931 \| good	3.995 \| good	0.217 \| good
2026-02-10T04:00:00.000Z	35 \| good	4.47 \| good	19.211 \| good	38.024 \| good	0.111 \| good	3.717 \| good	0.198 \| good
2026-02-10T05:00:00.000Z	34 \| good	4.373 \| good	16.157 \| good	37.076 \| good	0.113 \| good	5.111 \| good	0.217 \| good
2026-02-10T06:00:00.000Z	35 \| good	4.197 \| good	13.908 \| good	38.017 \| good	0.72 \| good	4.889 \| good	0.198 \| good
2026-02-10T07:00:00.000Z	35 \| good	4.188 \| good	13.327 \| good	38.01 \| good	0.72 \| good	4.886 \| good	0.198 \| good
2026-02-10T08:00:00.000Z	28 \| good	4.137 \| good	14.111 \| good	30.334 \| good	0.211 \| good	18.006 \| good	0.198 \| good
2026-02-10T09:00:00.000Z	27 \| good	5.442 \| good	20.452 \| good	23.688 \| good	0.31 \| good	25.923 \| good	0.236 \| good
2026-02-10T10:00:00.000Z	33 \| good	6.405 \| good	25.316 \| good	17.956 \| good	0.311 \| good	34.674 \| good	0.255 \| good
2026-02-10T11:00:00.000Z	44 \| good	8.33 \| good	35.981 \| good	16.041 \| good	0.408 \| good	35.22 \| good	0.314 \| good
2026-02-10T12:00:00.000Z	54 \| moderate	11.235 \| good	50.027 \| good	11.195 \| good	0.803 \| good	44.079 \| good	0.372 \| good
2026-02-10T13:00:00.000Z	54 \| moderate	11.295 \| good	50.642 \| good	11.187 \| good	0.803 \| good	44.18 \| good	0.372 \| good
2026-02-10T14:00:00.000Z	75 \| moderate	20.341 \| fine	103.045 \| fine	16.89 \| good	0.616 \| good	25.873 \| good	0.353 \| good
2026-02-10T15:00:00.000Z	76 \| moderate	20.401 \| fine	105.767 \| fine	23.574 \| good	0.312 \| good	15.44 \| good	0.257 \| good
2026-02-10T16:00:00.000Z	62 \| moderate	14.57 \| fine	75.543 \| fine	25.492 \| good	0.313 \| good	12.835 \| good	0.325 \| good
2026-02-10T17:00:00.000Z	54 \| moderate	11.13 \| good	55.9 \| fine	27.425 \| good	0.312 \| good	9.274 \| good	0.287 \| good
2026-02-10T18:00:00.000Z	54 \| moderate	11.319 \| good	55.533 \| fine	30.332 \| good	0.41 \| good	8.869 \| good	0.227 \| good
2026-02-10T19:00:00.000Z	49 \| good	8.83 \| good	36.946 \| good	34.17 \| good	0.505 \| good	4.616 \| good	0.256 \| good
2026-02-10T20:00:00.000Z	44 \| good	8.245 \| good	38.166 \| good	36.099 \| good	0.209 \| good	4.039 \| good	0.335 \| good
2026-02-10T21:00:00.000Z	38 \| good	7.024 \| good	34.812 \| good	37.034 \| good	0.111 \| good	2.94 \| good	0.315 \| good
2026-02-10T22:00:00.000Z	49 \| good	9.015 \| good	50.549 \| good	36.083 \| good	0.21 \| good	5.822 \| good	0.376 \| good
2026-02-10T23:00:00.000Z	54 \| moderate	10.87 \| good	59.645 \| fine	35.187 \| good	0.211 \| good	8.777 \| good	0.315 \| good
2026-02-11T00:00:00.000Z	54 \| moderate	10.851 \| good	57.739 \| fine	33.228 \| good	0.605 \| good	9.994 \| good	0.253 \| good
2026-02-11T01:00:00.000Z	56 \| moderate	11.938 \| good	60.231 \| fine	29.277 \| good	0.999 \| good	14.999 \| good	0.294 \| good
2026-02-11T02:00:00.000Z	52 \| moderate	10.426 \| good	47.091 \| good	30.315 \| good	0.309 \| good	11.017 \| good	0.258 \| good
2026-02-11T03:00:00.000Z	52 \| moderate	10.445 \| good	32.329 \| good	27.443 \| good	0.211 \| good	17.458 \| good	0.238 \| good
2026-02-11T04:00:00.000Z	54 \| moderate	10.597 \| good	32.748 \| good	27.454 \| good	0.21 \| good	17.425 \| good	0.258 \| good
2026-02-11T05:00:00.000Z	33 \| good	6.313 \| good	14.792 \| good	35.131 \| good	0.212 \| good	5.945 \| good	0.258 \| good
2026-02-11T06:00:00.000Z	33 \| good	6.43 \| good	11.446 \| good	34.171 \| good	0.211 \| good	5.404 \| good	0.258 \| good
2026-02-11T07:00:00.000Z	33 \| good	6.442 \| good	12.486 \| good	34.155 \| good	0.211 \| good	5.385 \| good	0.258 \| good
2026-02-11T08:00:00.000Z	44 \| good	7.999 \| good	12.773 \| good	30.367 \| good	0.309 \| good	8.523 \| good	0.258 \| good
2026-02-11T09:00:00.000Z	49 \| good	9.026 \| good	13.874 \| good	29.324 \| good	0.309 \| good	12.952 \| good	0.274 \| good
2026-02-11T10:00:00.000Z	54 \| moderate	10.885 \| good	18.926 \| good	29.314 \| good	0.309 \| good	14.452 \| good	0.279 \| good
2026-02-11T11:00:00.000Z	62 \| moderate	14.943 \| fine	31.24 \| good	29.175 \| good	0.405 \| good	15.311 \| good	0.279 \| good
2026-02-11T12:00:00.000Z	69 \| moderate	18.991 \| fine	43.026 \| good	28.17 \| good	0.307 \| good	14.487 \| good	0.315 \| good
2026-02-11T13:00:00.000Z	69 \| moderate	19.041 \| fine	42.48 \| good	28.197 \| good	0.307 \| good	14.334 \| good	0.315 \| good
2026-02-11T14:00:00.000Z	71 \| moderate	19.983 \| fine	46.3 \| good	27.064 \| good	0.407 \| good	12.587 \| good	0.335 \| good
2026-02-11T15:00:00.000Z	67 \| moderate	17.518 \| fine	42.254 \| good	26.181 \| good	0.508 \| good	10.549 \| good	0.335 \| good
2026-02-11T16:00:00.000Z	58 \| moderate	13.413 \| fine	35.078 \| good	30.003 \| good	0.41 \| good	5.481 \| good	0.267 \| good
2026-02-11T17:00:00.000Z	54 \| moderate	11.238 \| good	41.854 \| good	30.009 \| good	0.409 \| good	5.311 \| good	0.248 \| good
2026-02-11T18:00:00.000Z	52 \| moderate	10.158 \| good	40.492 \| good	32.947 \| good	0.309 \| good	5.22 \| good	0.22 \| good
2026-02-11T19:00:00.000Z	52 \| moderate	9.818 \| good	43.326 \| good	32.954 \| good	0.408 \| good	6.335 \| good	0.22 \| good
2026-02-11T20:00:00.000Z	52 \| moderate	9.971 \| good	45.478 \| good	32.059 \| good	0.309 \| good	5.067 \| good	0.22 \| good
2026-02-11T21:00:00.000Z	52 \| moderate	9.972 \| good	45.955 \| good	33.009 \| good	0.308 \| good	5.27 \| good	0.22 \| good
2026-02-11T22:00:00.000Z	54 \| moderate	11.033 \| good	56.487 \| fine	32.057 \| good	0.407 \| good	6.95 \| good	0.219 \| good
2026-02-11T23:00:00.000Z	58 \| moderate	12.612 \| fine	60.478 \| fine	31.056 \| good	0.505 \| good	9.8 \| good	0.219 \| good
2026-02-12T00:00:00.000Z	58 \| moderate	12.572 \| fine	57.326 \| fine	31.002 \| good	0.407 \| good	10.469 \| good	0.219 \| good
2026-02-12T01:00:00.000Z	54 \| moderate	11.301 \| good	45.551 \| good	33.993 \| good	0.407 \| good	4.87 \| good	0.219 \| good
2026-02-12T01:00:00.000Z	54 \| moderate	11.301 \| good	45.551 \| good	33.993 \| good	0.407 \| good	4.87 \| good	0.219 \| good
2026-02-12T02:00:00.000Z	102 \| sensitive	35.882 \| moderate	156.725 \| moderate	35.129 \| good	0.777 \| good	3.285 \| good	0.201 \| good
2026-02-12T03:00:00.000Z	107 \| sensitive	37.888 \| moderate	166.701 \| moderate	35.165 \| good	0.816 \| good	3.416 \| good	0.2 \| good
2026-02-12T04:00:00.000Z	105 \| sensitive	36.638 \| moderate	160.691 \| moderate	34.911 \| good	0.75 \| good	3.302 \| good	0.197 \| good
2026-02-12T05:00:00.000Z	99 \| moderate	35.064 \| fine	151.252 \| fine	34.471 \| good	0.683 \| good	3.188 \| good	0.195 \| good
2026-02-12T06:00:00.000Z	99 \| moderate	34.797 \| fine	150.859 \| fine	33.275 \| good	0.617 \| good	3.074 \| good	0.193 \| good
2026-02-12T07:00:00.000Z	82 \| moderate	25.794 \| fine	112.718 \| fine	30.793 \| good	0.553 \| good	2.668 \| good	0.188 \| good
2026-02-12T08:00:00.000Z	79 \| moderate	24.44 \| fine	106.575 \| fine	28.734 \| good	0.49 \| good	2.263 \| good	0.184 \| good
2026-02-12T09:00:00.000Z	82 \| moderate	25.997 \| fine	112.618 \| fine	29.389 \| good	0.427 \| good	1.857 \| good	0.179 \| good
2026-02-12T10:00:00.000Z	97 \| moderate	33.936 \| fine	146.459 \| fine	27.008 \| good	0.393 \| good	1.803 \| good	0.177 \| good
2026-02-12T11:00:00.000Z	102 \| sensitive	36.357 \| moderate	158.484 \| moderate	26.293 \| good	0.359 \| good	1.75 \| good	0.175 \| good
2026-02-12T12:00:00.000Z	94 \| moderate	32.329 \| fine	140.226 \| fine	28.356 \| good	0.326 \| good	1.696 \| good	0.173 \| good
2026-02-12T13:00:00.000Z	92 \| moderate	31 \| fine	134.337 \| fine	31.49 \| good	0.317 \| good	1.446 \| good	0.171 \| good
2026-02-12T14:00:00.000Z	88 \| moderate	28.726 \| fine	124.582 \| fine	34.84 \| good	0.309 \| good	1.196 \| good	0.168 \| good
2026-02-12T15:00:00.000Z	71 \| moderate	20.386 \| fine	89.03 \| fine	33.136 \| good	0.301 \| good	0.945 \| good	0.166 \| good
2026-02-12T16:00:00.000Z	58 \| moderate	13.081 \| fine	58.911 \| fine	36.213 \| good	0.258 \| good	0.793 \| good	0.16 \| good
2026-02-12T17:00:00.000Z	58 \| moderate	12.795 \| fine	57 \| fine	38.231 \| good	0.216 \| good	0.641 \| good	0.153 \| good
2026-02-12T18:00:00.000Z	52 \| moderate	10.392 \| good	46.01 \| good	36.871 \| good	0.173 \| good	0.488 \| good	0.147 \| good
2026-02-12T19:00:00.000Z	38 \| good	7.299 \| good	32.001 \| good	37.383 \| good	0.178 \| good	0.721 \| good	0.148 \| good
2026-02-12T20:00:00.000Z	36 \| good	6.29 \| good	27.87 \| good	38.897 \| good	0.184 \| good	0.953 \| good	0.148 \| good
2026-02-12T21:00:00.000Z	36 \| good	5.401 \| good	23.2 \| good	38.737 \| good	0.189 \| good	1.185 \| good	0.149 \| good
2026-02-12T22:00:00.000Z	44 \| good	8.217 \| good	36.091 \| good	36.481 \| good	0.212 \| good	1.645 \| good	0.152 \| good
2026-02-12T23:00:00.000Z	49 \| good	8.928 \| good	39.093 \| good	32.392 \| good	0.235 \| good	2.104 \| good	0.155 \| good
2026-02-13T00:00:00.000Z	49 \| good	9.279 \| good	41.069 \| good	32.778 \| good	0.259 \| good	2.564 \| good	0.158 \| good
2026-02-13T01:00:00.000Z	49 \| good	8.882 \| good	38.912 \| good	29.964 \| good	0.321 \| good	2.586 \| good	0.159 \| good
2026-02-13T02:00:00.000Z	44 \| good	8.011 \| good	34.861 \| good	27.956 \| good	0.383 \| good	2.608 \| good	0.159 \| good
2026-02-13T03:00:00.000Z	49 \| good	9.035 \| good	40.436 \| good	27.55 \| good	0.446 \| good	2.631 \| good	0.16 \| good
2026-02-13T04:00:00.000Z	52 \| moderate	10.216 \| good	45.508 \| good	25.719 \| good	0.422 \| good	2.521 \| good	0.159 \| good
2026-02-13T05:00:00.000Z	52 \| moderate	10.226 \| good	45.529 \| good	26.857 \| good	0.398 \| good	2.41 \| good	0.158 \| good
2026-02-13T06:00:00.000Z	37 \| good	4.329 \| good	4.688 \| good	40.488 \| good	0.373 \| good	2.289 \| good	0.157 \| good
2026-02-13T07:00:00.000Z	54 \| moderate	10.809 \| good	47.733 \| good	19.435 \| good	0.352 \| good	2.227 \| good	0.157 \| good
2026-02-13T08:00:00.000Z	52 \| moderate	10.42 \| good	46.448 \| good	20.435 \| good	0.331 \| good	2.153 \| good	0.158 \| good
2026-02-13T09:00:00.000Z	52 \| moderate	9.754 \| good	43.475 \| good	20.612 \| good	0.31 \| good	2.08 \| good	0.158 \| good
2026-02-13T10:00:00.000Z	38 \| good	7.445 \| good	32.745 \| good	21.838 \| good	0.311 \| good	2.418 \| good	0.161 \| good
2026-02-13T11:00:00.000Z	44 \| good	7.658 \| good	33.701 \| good	21.645 \| good	0.311 \| good	2.756 \| good	0.164 \| good
2026-02-13T12:00:00.000Z	34 \| good	4.942 \| good	5.277 \| good	36.931 \| good	0.312 \| good	3.068 \| good	0.167 \| good
2026-02-13T13:00:00.000Z	35 \| good	5.274 \| good	5.615 \| good	38.069 \| good	0.333 \| good	2.675 \| good	0.164 \| good
2026-02-13T14:00:00.000Z	36 \| good	4.894 \| good	5.219 \| good	39.206 \| good	0.355 \| good	2.282 \| good	0.162 \| good
2026-02-13T15:00:00.000Z	37 \| good	3.749 \| good	4.037 \| good	40.344 \| good	0.377 \| good	1.89 \| good	0.159 \| good
2026-02-13T16:00:00.000Z	33 \| good	6.337 \| good	28.083 \| good	36.256 \| good	0.37 \| good	1.625 \| good	0.155 \| good
2026-02-13T17:00:00.000Z	34 \| good	5.779 \| good	25.093 \| good	36.815 \| good	0.36 \| good	1.353 \| good	0.151 \| good
2026-02-13T18:00:00.000Z	40 \| good	1.933 \| good	2.213 \| good	43.445 \| good	0.349 \| good	1.082 \| good	0.146 \| good
2026-02-13T19:00:00.000Z	40 \| good	1.679 \| good	1.973 \| good	43.436 \| good	0.328 \| good	1.237 \| good	0.147 \| good
2026-02-13T20:00:00.000Z	40 \| good	1.553 \| good	1.855 \| good	43.427 \| good	0.306 \| good	1.392 \| good	0.147 \| good
2026-02-13T21:00:00.000Z	40 \| good	1.693 \| good	1.991 \| good	43.417 \| good	0.285 \| good	1.547 \| good	0.148 \| good
2026-02-13T22:00:00.000Z	39 \| good	2.468 \| good	2.775 \| good	41.633 \| good	0.284 \| good	2.711 \| good	0.16 \| good
2026-02-13T23:00:00.000Z	37 \| good	3.525 \| good	3.847 \| good	39.849 \| good	0.283 \| good	3.875 \| good	0.172 \| good
2026-02-14T00:00:00.000Z	35 \| good	3.847 \| good	4.168 \| good	38.065 \| good	0.282 \| good	5.039 \| good	0.185 \| good
2026-02-14T01:00:00.000Z	38 \| good	7.421 \| good	32.835 \| good	27.813 \| good	0.301 \| good	4.921 \| good	0.187 \| good

Portland

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Portland, Maine air quality map: Stay updated on AQI near you

0.22ppm

How accurate is Maine, USA air quality data?

Air quality and pollutant data for Maine, 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 Portland, Maine?

The air quality information for Portland, Maine is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Portland, Maine at its worst?

In the past 24 hours, the air quality in Portland, Maine was at its worst at 02:00:00 on 2026-02-11.

When did Portland, Maine experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Portland, Maine was observed at 07:00:00 on 2026-02-11.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 54, indicating Moderate conditions.

What is the most common type of pollution in Portland, Maine?

Portland, Maine air has the highest levels of PM2.5.

What should I do in case of poor air quality in Portland, Maine?

Poor air quality in Portland, Maine means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Portland, Maine at the moment?

PM_2.5 levels in Portland, Maine are currently 11.301 μg/m³.

What is the PM₁₀ level in Portland, Maine at the moment?

The PM₁₀ concentration in Portland, Maine is 45.551 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Portland, Maine at the moment?

The current carbon monoxide (CO) concentration in Portland, Maine is 0.219 ppm.

What is the sulfur dioxide (SO₂) level in Portland, Maine at the moment?

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.407 ppb.

What is the ozone (O₃) level in Portland, Maine at the moment?

The current ozone (O₃) level in Portland, Maine at the moment is 33.993 ppm.

What is the nitrogen dioxide (NO₂) level in Portland, Maine at the moment?

Nitrogen dioxide (NO₂) level in Portland, Maine at the moment is 4.87 ppb.

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