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

The PM10 concentration in Portland, Maine is 23.989 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 0.428 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 20.264 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 9.39 ppb.

Live air quality index in Portland, Maine today

Name: Live air pollution levels in Portland, Maine today
Creator: Ambee

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)

12.31 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

42.54 μg/m³

155

255

425

605+

Ozone (O₃)

12.08 ppb

201

201+

Sulfur Dioxide (SO₂)

0.81 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.00 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Portland, Maine

Get Live Pollen Counts

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
2025-07-29T12:00:00.000Z	62 \| moderate	14.642 \| fine	55.116 \| fine	7.35 \| good	0.392 \| good	15.087 \| good	0.299 \| good
2025-07-29T13:00:00.000Z	60 \| moderate	14.484 \| fine	54.542 \| good	9.21 \| good	1.846 \| good	11.785 \| good	0.272 \| good
2025-07-29T14:00:00.000Z	64 \| moderate	15.59 \| fine	59.361 \| fine	10.223 \| good	1.181 \| good	13.161 \| good	0.309 \| good
2025-07-29T15:00:00.000Z	66 \| moderate	16.598 \| fine	63.291 \| fine	16.083 \| good	4.02 \| good	11.952 \| good	0.28 \| good
2025-07-29T16:00:00.000Z	62 \| moderate	15.393 \| fine	57.696 \| fine	23.093 \| good	1.736 \| good	12.058 \| good	0.257 \| good
2025-07-29T17:00:00.000Z	66 \| moderate	17.479 \| fine	66.127 \| fine	32.014 \| good	1.276 \| good	8.092 \| good	0.257 \| good
2025-07-29T18:00:00.000Z	66 \| moderate	16.978 \| fine	62.97 \| fine	37.994 \| good	2.301 \| good	7.98 \| good	0.24 \| good
2025-07-29T19:00:00.000Z	64 \| moderate	16.353 \| fine	59.724 \| fine	37.136 \| good	2.155 \| good	5.898 \| good	0.237 \| good
2025-07-29T20:00:00.000Z	64 \| moderate	16.186 \| fine	58.933 \| fine	39.232 \| good	1.422 \| good	5.783 \| good	0.26 \| good
2025-07-29T21:00:00.000Z	62 \| moderate	15.314 \| fine	55.465 \| fine	37.323 \| good	1.084 \| good	3.795 \| good	0.257 \| good
2025-07-29T22:00:00.000Z	60 \| moderate	14.174 \| fine	51.85 \| good	36.318 \| good	2.145 \| good	2.005 \| good	0.237 \| good
2025-07-29T23:00:00.000Z	56 \| moderate	12.238 \| fine	45.308 \| good	33.409 \| good	1.108 \| good	2.208 \| good	0.237 \| good
2025-07-30T00:00:00.000Z	52 \| moderate	10.454 \| good	35.391 \| good	33.362 \| good	1.096 \| good	5.098 \| good	0.221 \| good
2025-07-30T01:00:00.000Z	56 \| moderate	11.528 \| good	41.432 \| good	28.402 \| good	0.562 \| good	5.699 \| good	0.182 \| good
2025-07-30T02:00:00.000Z	49 \| good	9.094 \| good	33.477 \| good	27.362 \| good	0.4 \| good	4.609 \| good	0.182 \| good
2025-07-30T03:00:00.000Z	88 \| moderate	29.431 \| fine	127.23 \| fine	25.621 \| good	0.275 \| good	2.927 \| good	0.2 \| good
2025-07-30T04:00:00.000Z	38 \| good	6.925 \| good	23.989 \| good	20.264 \| good	0.428 \| good	9.39 \| good	0.248 \| good
2025-07-30T05:00:00.000Z	38 \| good	7.186 \| good	26.071 \| good	20.21 \| good	0.441 \| good	5.303 \| good	0.295 \| good
2025-07-30T06:00:00.000Z	44 \| good	7.672 \| good	29.409 \| good	18.178 \| good	0.379 \| good	8.491 \| good	0.261 \| good
2025-07-30T07:00:00.000Z	38 \| good	7.061 \| good	26.825 \| good	17.121 \| good	0.481 \| good	6.084 \| good	0.292 \| good
2025-07-30T08:00:00.000Z	38 \| good	7.257 \| good	26.579 \| good	15.192 \| good	0.537 \| good	6.08 \| good	0.287 \| good
2025-07-30T09:00:00.000Z	38 \| good	7.006 \| good	25.343 \| good	11.307 \| good	0.549 \| good	7.579 \| good	0.247 \| good
2025-07-30T10:00:00.000Z	38 \| good	7.27 \| good	27.152 \| good	11.263 \| good	0.477 \| good	7.601 \| good	0.247 \| good
2025-07-30T11:00:00.000Z	44 \| good	7.536 \| good	27.042 \| good	11.268 \| good	0.594 \| good	7.902 \| good	0.263 \| good
2025-07-30T12:00:00.000Z	38 \| good	7.301 \| good	26.672 \| good	11.335 \| good	0.755 \| good	12.462 \| good	0.306 \| good
2025-07-30T13:00:00.000Z	54 \| moderate	10.628 \| good	40.554 \| good	20.168 \| good	0.951 \| good	4.809 \| good	0.321 \| good
2025-07-30T14:00:00.000Z	54 \| moderate	11.192 \| good	42.724 \| good	22.092 \| good	1.467 \| good	3.317 \| good	0.284 \| good
2025-07-30T15:00:00.000Z	56 \| moderate	11.842 \| good	44.548 \| good	22.105 \| good	2.372 \| good	6.307 \| good	0.283 \| good
2025-07-30T16:00:00.000Z	58 \| moderate	12.945 \| fine	50.593 \| good	27.002 \| good	1.824 \| good	4.416 \| good	0.263 \| good
2025-07-30T17:00:00.000Z	56 \| moderate	12.245 \| fine	46.38 \| good	26.087 \| good	1.449 \| good	4.72 \| good	0.266 \| good
2025-07-30T18:00:00.000Z	54 \| moderate	11.03 \| good	39.794 \| good	26.17 \| good	0.59 \| good	4.505 \| good	0.25 \| good
2025-07-30T19:00:00.000Z	54 \| moderate	11.343 \| good	40.107 \| good	29.05 \| good	0.525 \| good	5.801 \| good	0.25 \| good
2025-07-30T20:00:00.000Z	56 \| moderate	12.157 \| fine	42.929 \| good	28.977 \| good	0.401 \| good	3.429 \| good	0.25 \| good
2025-07-30T21:00:00.000Z	56 \| moderate	12.21 \| fine	42.836 \| good	28.977 \| good	0.433 \| good	3.436 \| good	0.248 \| good
2025-07-30T22:00:00.000Z	56 \| moderate	11.555 \| good	40.647 \| good	28.031 \| good	0.419 \| good	0.939 \| good	0.285 \| good
2025-07-30T23:00:00.000Z	52 \| moderate	9.764 \| good	33.313 \| good	26.928 \| good	0.505 \| good	2.023 \| good	0.226 \| good
2025-07-31T00:00:00.000Z	52 \| moderate	10.196 \| good	34.777 \| good	22.001 \| good	0.391 \| good	7.054 \| good	0.226 \| good
2025-07-31T01:00:00.000Z	56 \| moderate	12.273 \| fine	43.013 \| good	20.04 \| good	0.375 \| good	9.239 \| good	0.269 \| good
2025-07-31T02:00:00.000Z	60 \| moderate	14.055 \| fine	52.046 \| good	14.18 \| good	0.344 \| good	15.47 \| good	0.248 \| good
2025-07-31T03:00:00.000Z	60 \| moderate	13.858 \| fine	50.74 \| good	14.099 \| good	0.451 \| good	10.026 \| good	0.226 \| good
2025-07-31T04:00:00.000Z	58 \| moderate	13.385 \| fine	48.942 \| good	11.133 \| good	0.472 \| good	8.848 \| good	0.242 \| good
2025-07-31T05:00:00.000Z	58 \| moderate	12.69 \| fine	44.787 \| good	10.156 \| good	0.56 \| good	7.111 \| good	0.276 \| good
2025-07-31T06:00:00.000Z	56 \| moderate	11.641 \| good	40.504 \| good	7.133 \| good	1.056 \| good	5.715 \| good	0.306 \| good
2025-07-31T07:00:00.000Z	56 \| moderate	11.914 \| good	41.981 \| good	9.11 \| good	0.824 \| good	6.703 \| good	0.239 \| good
2025-07-31T08:00:00.000Z	54 \| moderate	11.468 \| good	40.192 \| good	11.114 \| good	0.553 \| good	5.222 \| good	0.223 \| good
2025-07-31T09:00:00.000Z	56 \| moderate	11.769 \| good	40.902 \| good	10.155 \| good	0.713 \| good	5.216 \| good	0.202 \| good
2025-07-31T10:00:00.000Z	56 \| moderate	12.31 \| fine	42.544 \| good	12.077 \| good	0.805 \| good	4.004 \| good	0.202 \| good
2025-07-31T11:00:00.000Z	56 \| moderate	12.31 \| fine	42.544 \| good	12.077 \| good	0.805 \| good	4.004 \| good	0.202 \| good
2025-07-30T06:00:00.000Z	84 \| moderate	27.1 \| fine	118.727 \| fine	21.428 \| good	0.355 \| good	3.208 \| good	0.224 \| good
2025-07-30T07:00:00.000Z	82 \| moderate	26.462 \| fine	114.934 \| fine	14.223 \| good	0.356 \| good	3.617 \| good	0.232 \| good
2025-07-30T08:00:00.000Z	73 \| moderate	21.341 \| fine	93 \| fine	8.931 \| good	0.357 \| good	4.026 \| good	0.239 \| good
2025-07-30T09:00:00.000Z	82 \| moderate	25.898 \| fine	112.917 \| fine	9.06 \| good	0.358 \| good	4.434 \| good	0.246 \| good
2025-07-30T10:00:00.000Z	81 \| moderate	24.852 \| fine	108.662 \| fine	7.955 \| good	0.372 \| good	4.046 \| good	0.255 \| good
2025-07-30T11:00:00.000Z	66 \| moderate	16.936 \| fine	75.272 \| fine	13.709 \| good	0.386 \| good	3.657 \| good	0.263 \| good
2025-07-30T12:00:00.000Z	66 \| moderate	17.438 \| fine	77.395 \| fine	19.563 \| good	0.401 \| good	3.268 \| good	0.271 \| good
2025-07-30T13:00:00.000Z	73 \| moderate	20.592 \| fine	89.988 \| fine	23.589 \| good	0.448 \| good	2.622 \| good	0.263 \| good
2025-07-30T14:00:00.000Z	73 \| moderate	21.114 \| fine	93.444 \| fine	26.503 \| good	0.494 \| good	1.977 \| good	0.255 \| good
2025-07-30T15:00:00.000Z	71 \| moderate	20.007 \| fine	87.642 \| fine	27.763 \| good	0.541 \| good	1.332 \| good	0.248 \| good
2025-07-30T16:00:00.000Z	69 \| moderate	18.739 \| fine	82.923 \| fine	30.785 \| good	0.485 \| good	1.245 \| good	0.242 \| good
2025-07-30T17:00:00.000Z	71 \| moderate	19.856 \| fine	86.773 \| fine	35.913 \| good	0.429 \| good	1.159 \| good	0.237 \| good
2025-07-30T18:00:00.000Z	67 \| moderate	18.296 \| fine	80.792 \| fine	35.045 \| good	0.373 \| good	1.072 \| good	0.232 \| good
2025-07-30T19:00:00.000Z	56 \| moderate	12.474 \| fine	56.498 \| fine	30.564 \| good	0.35 \| good	1.454 \| good	0.232 \| good
2025-07-30T20:00:00.000Z	58 \| moderate	12.863 \| fine	57.263 \| fine	26.035 \| good	0.326 \| good	1.836 \| good	0.232 \| good
2025-07-30T21:00:00.000Z	58 \| moderate	13.245 \| fine	59.195 \| fine	27.572 \| good	0.303 \| good	2.218 \| good	0.232 \| good
2025-07-30T22:00:00.000Z	58 \| moderate	13.115 \| fine	59.067 \| fine	27.586 \| good	0.291 \| good	3.408 \| good	0.242 \| good
2025-07-30T23:00:00.000Z	58 \| moderate	12.805 \| fine	57.264 \| fine	24.574 \| good	0.278 \| good	4.598 \| good	0.252 \| good
2025-07-31T00:00:00.000Z	60 \| moderate	14.377 \| fine	64.688 \| fine	22.576 \| good	0.266 \| good	5.787 \| good	0.262 \| good
2025-07-31T01:00:00.000Z	62 \| moderate	15.122 \| fine	68.302 \| fine	18.204 \| good	0.285 \| good	5.853 \| good	0.259 \| good
2025-07-31T02:00:00.000Z	66 \| moderate	16.528 \| fine	72.959 \| fine	18.498 \| good	0.304 \| good	5.918 \| good	0.256 \| good
2025-07-31T03:00:00.000Z	69 \| moderate	18.679 \| fine	82.927 \| fine	20.979 \| good	0.323 \| good	5.984 \| good	0.253 \| good
2025-07-31T04:00:00.000Z	75 \| moderate	21.959 \| fine	96.883 \| fine	20.262 \| good	0.326 \| good	5.073 \| good	0.243 \| good
2025-07-31T05:00:00.000Z	77 \| moderate	23.027 \| fine	101 \| fine	19.849 \| good	0.328 \| good	4.163 \| good	0.233 \| good
2025-07-31T06:00:00.000Z	77 \| moderate	22.634 \| fine	99.05 \| fine	20.528 \| good	0.331 \| good	3.252 \| good	0.223 \| good
2025-07-31T07:00:00.000Z	82 \| moderate	26.042 \| fine	113.238 \| fine	18.323 \| good	0.334 \| good	2.812 \| good	0.226 \| good
2025-07-31T08:00:00.000Z	105 \| sensitive	37.351 \| moderate	164.421 \| moderate	17.848 \| good	0.338 \| good	2.371 \| good	0.229 \| good
2025-07-31T09:00:00.000Z	58 \| moderate	12.788 \| fine	57.066 \| fine	16.14 \| good	0.341 \| good	1.93 \| good	0.232 \| good
2025-07-31T10:00:00.000Z	69 \| moderate	19.116 \| fine	84.883 \| fine	13.432 \| good	0.341 \| good	2.163 \| good	0.237 \| good
2025-07-31T11:00:00.000Z	62 \| moderate	15.49 \| fine	69 \| fine	14.18 \| good	0.342 \| good	2.396 \| good	0.242 \| good
2025-07-31T12:00:00.000Z	64 \| moderate	15.989 \| fine	71 \| fine	12.363 \| good	0.342 \| good	2.63 \| good	0.247 \| good
2025-07-31T13:00:00.000Z	64 \| moderate	16.384 \| fine	72.846 \| fine	15.208 \| good	0.363 \| good	2.312 \| good	0.246 \| good
2025-07-31T14:00:00.000Z	60 \| moderate	14.418 \| fine	64.77 \| fine	17.138 \| good	0.384 \| good	1.994 \| good	0.245 \| good
2025-07-31T15:00:00.000Z	56 \| moderate	12.338 \| fine	55.117 \| fine	16.492 \| good	0.404 \| good	1.677 \| good	0.244 \| good
2025-07-31T16:00:00.000Z	52 \| moderate	9.861 \| good	44.042 \| good	15.496 \| good	0.396 \| good	1.5 \| good	0.242 \| good
2025-07-31T17:00:00.000Z	49 \| good	8.606 \| good	37.259 \| good	13.685 \| good	0.389 \| good	1.323 \| good	0.241 \| good
2025-07-31T18:00:00.000Z	52 \| moderate	10.001 \| good	44.168 \| good	12.648 \| good	0.381 \| good	1.146 \| good	0.239 \| good
2025-07-31T19:00:00.000Z	52 \| moderate	10.287 \| good	45.238 \| good	14.179 \| good	0.385 \| good	1.513 \| good	0.244 \| good
2025-07-31T20:00:00.000Z	52 \| moderate	10.092 \| good	44.927 \| good	14.979 \| good	0.39 \| good	1.879 \| good	0.249 \| good
2025-07-31T21:00:00.000Z	49 \| good	9.091 \| good	40.91 \| good	14.235 \| good	0.394 \| good	2.246 \| good	0.254 \| good
2025-07-31T22:00:00.000Z	38 \| good	7.468 \| good	32.821 \| good	12.971 \| good	0.397 \| good	2.883 \| good	0.258 \| good
2025-07-31T23:00:00.000Z	38 \| good	7.254 \| good	31.838 \| good	8.433 \| good	0.4 \| good	3.52 \| good	0.263 \| good
2025-08-01T00:00:00.000Z	73 \| moderate	20.761 \| fine	21.931 \| good	32.508 \| good	0.399 \| good	4.11 \| good	0.267 \| good
2025-08-01T01:00:00.000Z	54 \| moderate	10.857 \| good	47.845 \| good	13.284 \| good	0.429 \| good	4.157 \| good	0.264 \| good
2025-08-01T02:00:00.000Z	54 \| moderate	10.683 \| good	47.65 \| good	10.85 \| good	0.456 \| good	4.157 \| good	0.261 \| good
2025-08-01T03:00:00.000Z	52 \| moderate	10.394 \| good	45.854 \| good	11.181 \| good	0.483 \| good	4.157 \| good	0.257 \| good
2025-08-01T04:00:00.000Z	60 \| moderate	13.579 \| fine	60.929 \| fine	13.912 \| good	0.484 \| good	3.828 \| good	0.252 \| good
2025-08-01T05:00:00.000Z	56 \| moderate	11.599 \| good	51.034 \| good	13.373 \| good	0.484 \| good	3.499 \| good	0.246 \| good

Portland

Get reliable air quality data to drive your business

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

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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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Check live rankings of places in the USA affected by air pollution.

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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 03:00:00 on 2025-07-30.

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 04:00:00 on 2025-07-30.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 38, indicating Good 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 6.925 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 23.989 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 0.248 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.428 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 20.264 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 9.39 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-29T12:00:00.000Z	62 \| moderate	14.642 \| fine	55.116 \| fine	7.35 \| good	0.392 \| good	15.087 \| good	0.299 \| good
2025-07-29T13:00:00.000Z	60 \| moderate	14.484 \| fine	54.542 \| good	9.21 \| good	1.846 \| good	11.785 \| good	0.272 \| good
2025-07-29T14:00:00.000Z	64 \| moderate	15.59 \| fine	59.361 \| fine	10.223 \| good	1.181 \| good	13.161 \| good	0.309 \| good
2025-07-29T15:00:00.000Z	66 \| moderate	16.598 \| fine	63.291 \| fine	16.083 \| good	4.02 \| good	11.952 \| good	0.28 \| good
2025-07-29T16:00:00.000Z	62 \| moderate	15.393 \| fine	57.696 \| fine	23.093 \| good	1.736 \| good	12.058 \| good	0.257 \| good
2025-07-29T17:00:00.000Z	66 \| moderate	17.479 \| fine	66.127 \| fine	32.014 \| good	1.276 \| good	8.092 \| good	0.257 \| good
2025-07-29T18:00:00.000Z	66 \| moderate	16.978 \| fine	62.97 \| fine	37.994 \| good	2.301 \| good	7.98 \| good	0.24 \| good
2025-07-29T19:00:00.000Z	64 \| moderate	16.353 \| fine	59.724 \| fine	37.136 \| good	2.155 \| good	5.898 \| good	0.237 \| good
2025-07-29T20:00:00.000Z	64 \| moderate	16.186 \| fine	58.933 \| fine	39.232 \| good	1.422 \| good	5.783 \| good	0.26 \| good
2025-07-29T21:00:00.000Z	62 \| moderate	15.314 \| fine	55.465 \| fine	37.323 \| good	1.084 \| good	3.795 \| good	0.257 \| good
2025-07-29T22:00:00.000Z	60 \| moderate	14.174 \| fine	51.85 \| good	36.318 \| good	2.145 \| good	2.005 \| good	0.237 \| good
2025-07-29T23:00:00.000Z	56 \| moderate	12.238 \| fine	45.308 \| good	33.409 \| good	1.108 \| good	2.208 \| good	0.237 \| good
2025-07-30T00:00:00.000Z	52 \| moderate	10.454 \| good	35.391 \| good	33.362 \| good	1.096 \| good	5.098 \| good	0.221 \| good
2025-07-30T01:00:00.000Z	56 \| moderate	11.528 \| good	41.432 \| good	28.402 \| good	0.562 \| good	5.699 \| good	0.182 \| good
2025-07-30T02:00:00.000Z	49 \| good	9.094 \| good	33.477 \| good	27.362 \| good	0.4 \| good	4.609 \| good	0.182 \| good
2025-07-30T03:00:00.000Z	88 \| moderate	29.431 \| fine	127.23 \| fine	25.621 \| good	0.275 \| good	2.927 \| good	0.2 \| good
2025-07-30T04:00:00.000Z	38 \| good	6.925 \| good	23.989 \| good	20.264 \| good	0.428 \| good	9.39 \| good	0.248 \| good
2025-07-30T05:00:00.000Z	38 \| good	7.186 \| good	26.071 \| good	20.21 \| good	0.441 \| good	5.303 \| good	0.295 \| good
2025-07-30T06:00:00.000Z	44 \| good	7.672 \| good	29.409 \| good	18.178 \| good	0.379 \| good	8.491 \| good	0.261 \| good
2025-07-30T07:00:00.000Z	38 \| good	7.061 \| good	26.825 \| good	17.121 \| good	0.481 \| good	6.084 \| good	0.292 \| good
2025-07-30T08:00:00.000Z	38 \| good	7.257 \| good	26.579 \| good	15.192 \| good	0.537 \| good	6.08 \| good	0.287 \| good
2025-07-30T09:00:00.000Z	38 \| good	7.006 \| good	25.343 \| good	11.307 \| good	0.549 \| good	7.579 \| good	0.247 \| good
2025-07-30T10:00:00.000Z	38 \| good	7.27 \| good	27.152 \| good	11.263 \| good	0.477 \| good	7.601 \| good	0.247 \| good
2025-07-30T11:00:00.000Z	44 \| good	7.536 \| good	27.042 \| good	11.268 \| good	0.594 \| good	7.902 \| good	0.263 \| good
2025-07-30T12:00:00.000Z	38 \| good	7.301 \| good	26.672 \| good	11.335 \| good	0.755 \| good	12.462 \| good	0.306 \| good
2025-07-30T13:00:00.000Z	54 \| moderate	10.628 \| good	40.554 \| good	20.168 \| good	0.951 \| good	4.809 \| good	0.321 \| good
2025-07-30T14:00:00.000Z	54 \| moderate	11.192 \| good	42.724 \| good	22.092 \| good	1.467 \| good	3.317 \| good	0.284 \| good
2025-07-30T15:00:00.000Z	56 \| moderate	11.842 \| good	44.548 \| good	22.105 \| good	2.372 \| good	6.307 \| good	0.283 \| good
2025-07-30T16:00:00.000Z	58 \| moderate	12.945 \| fine	50.593 \| good	27.002 \| good	1.824 \| good	4.416 \| good	0.263 \| good
2025-07-30T17:00:00.000Z	56 \| moderate	12.245 \| fine	46.38 \| good	26.087 \| good	1.449 \| good	4.72 \| good	0.266 \| good
2025-07-30T18:00:00.000Z	54 \| moderate	11.03 \| good	39.794 \| good	26.17 \| good	0.59 \| good	4.505 \| good	0.25 \| good
2025-07-30T19:00:00.000Z	54 \| moderate	11.343 \| good	40.107 \| good	29.05 \| good	0.525 \| good	5.801 \| good	0.25 \| good
2025-07-30T20:00:00.000Z	56 \| moderate	12.157 \| fine	42.929 \| good	28.977 \| good	0.401 \| good	3.429 \| good	0.25 \| good
2025-07-30T21:00:00.000Z	56 \| moderate	12.21 \| fine	42.836 \| good	28.977 \| good	0.433 \| good	3.436 \| good	0.248 \| good
2025-07-30T22:00:00.000Z	56 \| moderate	11.555 \| good	40.647 \| good	28.031 \| good	0.419 \| good	0.939 \| good	0.285 \| good
2025-07-30T23:00:00.000Z	52 \| moderate	9.764 \| good	33.313 \| good	26.928 \| good	0.505 \| good	2.023 \| good	0.226 \| good
2025-07-31T00:00:00.000Z	52 \| moderate	10.196 \| good	34.777 \| good	22.001 \| good	0.391 \| good	7.054 \| good	0.226 \| good
2025-07-31T01:00:00.000Z	56 \| moderate	12.273 \| fine	43.013 \| good	20.04 \| good	0.375 \| good	9.239 \| good	0.269 \| good
2025-07-31T02:00:00.000Z	60 \| moderate	14.055 \| fine	52.046 \| good	14.18 \| good	0.344 \| good	15.47 \| good	0.248 \| good
2025-07-31T03:00:00.000Z	60 \| moderate	13.858 \| fine	50.74 \| good	14.099 \| good	0.451 \| good	10.026 \| good	0.226 \| good
2025-07-31T04:00:00.000Z	58 \| moderate	13.385 \| fine	48.942 \| good	11.133 \| good	0.472 \| good	8.848 \| good	0.242 \| good
2025-07-31T05:00:00.000Z	58 \| moderate	12.69 \| fine	44.787 \| good	10.156 \| good	0.56 \| good	7.111 \| good	0.276 \| good
2025-07-31T06:00:00.000Z	56 \| moderate	11.641 \| good	40.504 \| good	7.133 \| good	1.056 \| good	5.715 \| good	0.306 \| good
2025-07-31T07:00:00.000Z	56 \| moderate	11.914 \| good	41.981 \| good	9.11 \| good	0.824 \| good	6.703 \| good	0.239 \| good
2025-07-31T08:00:00.000Z	54 \| moderate	11.468 \| good	40.192 \| good	11.114 \| good	0.553 \| good	5.222 \| good	0.223 \| good
2025-07-31T09:00:00.000Z	56 \| moderate	11.769 \| good	40.902 \| good	10.155 \| good	0.713 \| good	5.216 \| good	0.202 \| good
2025-07-31T10:00:00.000Z	56 \| moderate	12.31 \| fine	42.544 \| good	12.077 \| good	0.805 \| good	4.004 \| good	0.202 \| good
2025-07-31T11:00:00.000Z	56 \| moderate	12.31 \| fine	42.544 \| good	12.077 \| good	0.805 \| good	4.004 \| good	0.202 \| good
2025-07-30T06:00:00.000Z	84 \| moderate	27.1 \| fine	118.727 \| fine	21.428 \| good	0.355 \| good	3.208 \| good	0.224 \| good
2025-07-30T07:00:00.000Z	82 \| moderate	26.462 \| fine	114.934 \| fine	14.223 \| good	0.356 \| good	3.617 \| good	0.232 \| good
2025-07-30T08:00:00.000Z	73 \| moderate	21.341 \| fine	93 \| fine	8.931 \| good	0.357 \| good	4.026 \| good	0.239 \| good
2025-07-30T09:00:00.000Z	82 \| moderate	25.898 \| fine	112.917 \| fine	9.06 \| good	0.358 \| good	4.434 \| good	0.246 \| good
2025-07-30T10:00:00.000Z	81 \| moderate	24.852 \| fine	108.662 \| fine	7.955 \| good	0.372 \| good	4.046 \| good	0.255 \| good
2025-07-30T11:00:00.000Z	66 \| moderate	16.936 \| fine	75.272 \| fine	13.709 \| good	0.386 \| good	3.657 \| good	0.263 \| good
2025-07-30T12:00:00.000Z	66 \| moderate	17.438 \| fine	77.395 \| fine	19.563 \| good	0.401 \| good	3.268 \| good	0.271 \| good
2025-07-30T13:00:00.000Z	73 \| moderate	20.592 \| fine	89.988 \| fine	23.589 \| good	0.448 \| good	2.622 \| good	0.263 \| good
2025-07-30T14:00:00.000Z	73 \| moderate	21.114 \| fine	93.444 \| fine	26.503 \| good	0.494 \| good	1.977 \| good	0.255 \| good
2025-07-30T15:00:00.000Z	71 \| moderate	20.007 \| fine	87.642 \| fine	27.763 \| good	0.541 \| good	1.332 \| good	0.248 \| good
2025-07-30T16:00:00.000Z	69 \| moderate	18.739 \| fine	82.923 \| fine	30.785 \| good	0.485 \| good	1.245 \| good	0.242 \| good
2025-07-30T17:00:00.000Z	71 \| moderate	19.856 \| fine	86.773 \| fine	35.913 \| good	0.429 \| good	1.159 \| good	0.237 \| good
2025-07-30T18:00:00.000Z	67 \| moderate	18.296 \| fine	80.792 \| fine	35.045 \| good	0.373 \| good	1.072 \| good	0.232 \| good
2025-07-30T19:00:00.000Z	56 \| moderate	12.474 \| fine	56.498 \| fine	30.564 \| good	0.35 \| good	1.454 \| good	0.232 \| good
2025-07-30T20:00:00.000Z	58 \| moderate	12.863 \| fine	57.263 \| fine	26.035 \| good	0.326 \| good	1.836 \| good	0.232 \| good
2025-07-30T21:00:00.000Z	58 \| moderate	13.245 \| fine	59.195 \| fine	27.572 \| good	0.303 \| good	2.218 \| good	0.232 \| good
2025-07-30T22:00:00.000Z	58 \| moderate	13.115 \| fine	59.067 \| fine	27.586 \| good	0.291 \| good	3.408 \| good	0.242 \| good
2025-07-30T23:00:00.000Z	58 \| moderate	12.805 \| fine	57.264 \| fine	24.574 \| good	0.278 \| good	4.598 \| good	0.252 \| good
2025-07-31T00:00:00.000Z	60 \| moderate	14.377 \| fine	64.688 \| fine	22.576 \| good	0.266 \| good	5.787 \| good	0.262 \| good
2025-07-31T01:00:00.000Z	62 \| moderate	15.122 \| fine	68.302 \| fine	18.204 \| good	0.285 \| good	5.853 \| good	0.259 \| good
2025-07-31T02:00:00.000Z	66 \| moderate	16.528 \| fine	72.959 \| fine	18.498 \| good	0.304 \| good	5.918 \| good	0.256 \| good
2025-07-31T03:00:00.000Z	69 \| moderate	18.679 \| fine	82.927 \| fine	20.979 \| good	0.323 \| good	5.984 \| good	0.253 \| good
2025-07-31T04:00:00.000Z	75 \| moderate	21.959 \| fine	96.883 \| fine	20.262 \| good	0.326 \| good	5.073 \| good	0.243 \| good
2025-07-31T05:00:00.000Z	77 \| moderate	23.027 \| fine	101 \| fine	19.849 \| good	0.328 \| good	4.163 \| good	0.233 \| good
2025-07-31T06:00:00.000Z	77 \| moderate	22.634 \| fine	99.05 \| fine	20.528 \| good	0.331 \| good	3.252 \| good	0.223 \| good
2025-07-31T07:00:00.000Z	82 \| moderate	26.042 \| fine	113.238 \| fine	18.323 \| good	0.334 \| good	2.812 \| good	0.226 \| good
2025-07-31T08:00:00.000Z	105 \| sensitive	37.351 \| moderate	164.421 \| moderate	17.848 \| good	0.338 \| good	2.371 \| good	0.229 \| good
2025-07-31T09:00:00.000Z	58 \| moderate	12.788 \| fine	57.066 \| fine	16.14 \| good	0.341 \| good	1.93 \| good	0.232 \| good
2025-07-31T10:00:00.000Z	69 \| moderate	19.116 \| fine	84.883 \| fine	13.432 \| good	0.341 \| good	2.163 \| good	0.237 \| good
2025-07-31T11:00:00.000Z	62 \| moderate	15.49 \| fine	69 \| fine	14.18 \| good	0.342 \| good	2.396 \| good	0.242 \| good
2025-07-31T12:00:00.000Z	64 \| moderate	15.989 \| fine	71 \| fine	12.363 \| good	0.342 \| good	2.63 \| good	0.247 \| good
2025-07-31T13:00:00.000Z	64 \| moderate	16.384 \| fine	72.846 \| fine	15.208 \| good	0.363 \| good	2.312 \| good	0.246 \| good
2025-07-31T14:00:00.000Z	60 \| moderate	14.418 \| fine	64.77 \| fine	17.138 \| good	0.384 \| good	1.994 \| good	0.245 \| good
2025-07-31T15:00:00.000Z	56 \| moderate	12.338 \| fine	55.117 \| fine	16.492 \| good	0.404 \| good	1.677 \| good	0.244 \| good
2025-07-31T16:00:00.000Z	52 \| moderate	9.861 \| good	44.042 \| good	15.496 \| good	0.396 \| good	1.5 \| good	0.242 \| good
2025-07-31T17:00:00.000Z	49 \| good	8.606 \| good	37.259 \| good	13.685 \| good	0.389 \| good	1.323 \| good	0.241 \| good
2025-07-31T18:00:00.000Z	52 \| moderate	10.001 \| good	44.168 \| good	12.648 \| good	0.381 \| good	1.146 \| good	0.239 \| good
2025-07-31T19:00:00.000Z	52 \| moderate	10.287 \| good	45.238 \| good	14.179 \| good	0.385 \| good	1.513 \| good	0.244 \| good
2025-07-31T20:00:00.000Z	52 \| moderate	10.092 \| good	44.927 \| good	14.979 \| good	0.39 \| good	1.879 \| good	0.249 \| good
2025-07-31T21:00:00.000Z	49 \| good	9.091 \| good	40.91 \| good	14.235 \| good	0.394 \| good	2.246 \| good	0.254 \| good
2025-07-31T22:00:00.000Z	38 \| good	7.468 \| good	32.821 \| good	12.971 \| good	0.397 \| good	2.883 \| good	0.258 \| good
2025-07-31T23:00:00.000Z	38 \| good	7.254 \| good	31.838 \| good	8.433 \| good	0.4 \| good	3.52 \| good	0.263 \| good
2025-08-01T00:00:00.000Z	73 \| moderate	20.761 \| fine	21.931 \| good	32.508 \| good	0.399 \| good	4.11 \| good	0.267 \| good
2025-08-01T01:00:00.000Z	54 \| moderate	10.857 \| good	47.845 \| good	13.284 \| good	0.429 \| good	4.157 \| good	0.264 \| good
2025-08-01T02:00:00.000Z	54 \| moderate	10.683 \| good	47.65 \| good	10.85 \| good	0.456 \| good	4.157 \| good	0.261 \| good
2025-08-01T03:00:00.000Z	52 \| moderate	10.394 \| good	45.854 \| good	11.181 \| good	0.483 \| good	4.157 \| good	0.257 \| good
2025-08-01T04:00:00.000Z	60 \| moderate	13.579 \| fine	60.929 \| fine	13.912 \| good	0.484 \| good	3.828 \| good	0.252 \| good
2025-08-01T05:00:00.000Z	56 \| moderate	11.599 \| good	51.034 \| good	13.373 \| good	0.484 \| good	3.499 \| good	0.246 \| good

Live air quality index in Portland, Maine today

Major air pollutants in Portland, Maine

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Portland, Maine air quality forecast and history

Get reliable air quality data to drive your business

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

Air quality in nearby cities

South Portland, Maine

Westbrook, Maine

Falmouth, Maine

Scarborough, Maine

Gorham, Maine

Windham, Maine

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Air quality levels in US

Frequently asked questions

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

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

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

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

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

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

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

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

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

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