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

The PM10 concentration in Portland, Maine is 24.806 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 0.11 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 33.566 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 21.199 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 6.067 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)

Good

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)

6.80 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

26.37 μg/m³

155

255

425

605+

Ozone (O₃)

32.69 ppb

201

201+

Sulfur Dioxide (SO₂)

0.11 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

20.51 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 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
2026-03-28T00:00:00.000Z	40 \| good	4.25 \| good	14.924 \| good	42.919 \| good	0.599 \| good	2.886 \| good	0.195 \| good
2026-03-28T01:00:00.000Z	41 \| good	4.439 \| good	15.93 \| good	43.847 \| good	0.548 \| good	3.387 \| good	0.18 \| good
2026-03-28T02:00:00.000Z	39 \| good	4.529 \| good	13.99 \| good	41.912 \| good	0.637 \| good	3.605 \| good	0.18 \| good
2026-03-28T03:00:00.000Z	35 \| good	4.565 \| good	14.117 \| good	38.139 \| good	0.546 \| good	3.012 \| good	0.214 \| good
2026-03-28T04:00:00.000Z	37 \| good	4.48 \| good	12.316 \| good	39.946 \| good	0.512 \| good	2.388 \| good	0.253 \| good
2026-03-28T05:00:00.000Z	40 \| good	4.391 \| good	10.163 \| good	42.78 \| good	0.409 \| good	2.405 \| good	0.214 \| good
2026-03-28T06:00:00.000Z	37 \| good	4.388 \| good	10.049 \| good	39.895 \| good	0.409 \| good	2.114 \| good	0.214 \| good
2026-03-28T07:00:00.000Z	37 \| good	4.394 \| good	10.033 \| good	39.895 \| good	0.548 \| good	2.114 \| good	0.18 \| good
2026-03-28T08:00:00.000Z	35 \| good	4.404 \| good	8.159 \| good	37.919 \| good	0.579 \| good	1.705 \| good	0.18 \| good
2026-03-28T09:00:00.000Z	33 \| good	4.404 \| good	9.039 \| good	36.051 \| good	0.508 \| good	2.597 \| good	0.161 \| good
2026-03-28T10:00:00.000Z	35 \| good	4.512 \| good	10.137 \| good	37.91 \| good	0.557 \| good	3.086 \| good	0.18 \| good
2026-03-28T11:00:00.000Z	36 \| good	4.611 \| good	12.036 \| good	38.836 \| good	0.588 \| good	4.17 \| good	0.181 \| good
2026-03-28T12:00:00.000Z	36 \| good	4.604 \| good	12.162 \| good	38.842 \| good	0.559 \| good	4.165 \| good	0.181 \| good
2026-03-28T13:00:00.000Z	36 \| good	4.595 \| good	11.258 \| good	38.828 \| good	0.107 \| good	2.096 \| good	0.181 \| good
2026-03-28T14:00:00.000Z	34 \| good	4.614 \| good	9.542 \| good	36.956 \| good	0.629 \| good	1.11 \| good	0.181 \| good
2026-03-28T15:00:00.000Z	33 \| good	4.508 \| good	8.41 \| good	35.995 \| good	0.628 \| good	1.108 \| good	0.181 \| good
2026-03-28T16:00:00.000Z	33 \| good	4.517 \| good	8.295 \| good	35.993 \| good	0.609 \| good	1.404 \| good	0.181 \| good
2026-03-28T17:00:00.000Z	34 \| good	4.709 \| good	10.143 \| good	37.011 \| good	0.628 \| good	1.494 \| good	0.181 \| good
2026-03-28T18:00:00.000Z	36 \| good	4.782 \| good	9.41 \| good	38.963 \| good	0.645 \| good	1.296 \| good	0.181 \| good
2026-03-28T19:00:00.000Z	35 \| good	4.878 \| good	9.305 \| good	38.053 \| good	0.661 \| good	3.857 \| good	0.181 \| good
2026-03-28T20:00:00.000Z	33 \| good	4.978 \| good	11.096 \| good	36.222 \| good	0.111 \| good	12.636 \| good	0.181 \| good
2026-03-28T21:00:00.000Z	31 \| good	5.269 \| good	13.199 \| good	34.329 \| good	0.111 \| good	12.253 \| good	0.181 \| good
2026-03-28T22:00:00.000Z	33 \| good	5.52 \| good	15.789 \| good	34.332 \| good	0.207 \| good	18.381 \| good	0.181 \| good
2026-03-28T23:00:00.000Z	33 \| good	5.636 \| good	17.859 \| good	32.492 \| good	0.207 \| good	21.15 \| good	0.2 \| good
2026-03-29T00:00:00.000Z	33 \| good	5.726 \| good	17.659 \| good	34.347 \| good	0.576 \| good	10.583 \| good	0.2 \| good
2026-03-29T01:00:00.000Z	33 \| good	5.645 \| good	15.946 \| good	34.393 \| good	0.573 \| good	4.926 \| good	0.219 \| good
2026-03-29T02:00:00.000Z	33 \| good	5.853 \| good	16.849 \| good	33.414 \| good	0.612 \| good	6.628 \| good	0.2 \| good
2026-03-29T03:00:00.000Z	26 \| good	3.249 \| good	13.975 \| good	28.163 \| good	0.427 \| good	3.606 \| good	0.228 \| good
2026-03-29T04:00:00.000Z	38 \| good	6.734 \| good	16.865 \| good	36.019 \| good	0.597 \| good	9.518 \| good	0.2 \| good
2026-03-29T05:00:00.000Z	49 \| good	8.75 \| good	17.929 \| good	35.01 \| good	0.591 \| good	9.833 \| good	0.2 \| good
2026-03-29T06:00:00.000Z	49 \| good	8.754 \| good	17.761 \| good	35.009 \| good	0.591 \| good	9.856 \| good	0.2 \| good
2026-03-29T07:00:00.000Z	49 \| good	9.049 \| good	16.951 \| good	30.256 \| good	0.591 \| good	12.691 \| good	0.181 \| good
2026-03-29T08:00:00.000Z	44 \| good	7.931 \| good	14.129 \| good	27.303 \| good	0.557 \| good	12.687 \| good	0.2 \| good
2026-03-29T09:00:00.000Z	38 \| good	7.134 \| good	11.923 \| good	33.889 \| good	0.557 \| good	7.585 \| good	0.2 \| good
2026-03-29T10:00:00.000Z	33 \| good	6.371 \| good	10.202 \| good	33.808 \| good	0.575 \| good	7.91 \| good	0.179 \| good
2026-03-29T11:00:00.000Z	33 \| good	5.682 \| good	9.332 \| good	30.963 \| good	0.609 \| good	9.256 \| good	0.179 \| good
2026-03-29T12:00:00.000Z	33 \| good	5.598 \| good	10.099 \| good	30.998 \| good	0.589 \| good	9.662 \| good	0.198 \| good
2026-03-29T13:00:00.000Z	33 \| good	5.598 \| good	10.237 \| good	31.022 \| good	0.588 \| good	9.665 \| good	0.22 \| good
2026-03-29T14:00:00.000Z	32 \| good	4.685 \| good	10.114 \| good	35.067 \| good	0.574 \| good	2.503 \| good	0.181 \| good
2026-03-29T15:00:00.000Z	34 \| good	4.406 \| good	11.03 \| good	37.029 \| good	0.576 \| good	2.799 \| good	0.181 \| good
2026-03-29T16:00:00.000Z	35 \| good	4.313 \| good	11.348 \| good	38.04 \| good	0.626 \| good	5.365 \| good	0.181 \| good
2026-03-29T17:00:00.000Z	35 \| good	4.397 \| good	11.105 \| good	38.14 \| good	0.616 \| good	5.741 \| good	0.181 \| good
2026-03-29T18:00:00.000Z	36 \| good	4.684 \| good	13.977 \| good	39.118 \| good	0.597 \| good	11.043 \| good	0.165 \| good
2026-03-29T19:00:00.000Z	34 \| good	4.977 \| good	15.501 \| good	37.346 \| good	0.109 \| good	16.359 \| good	0.165 \| good
2026-03-29T20:00:00.000Z	32 \| good	5.253 \| good	19.168 \| good	35.457 \| good	0.11 \| good	20.59 \| good	0.165 \| good
2026-03-29T21:00:00.000Z	33 \| good	6.067 \| good	24.806 \| good	33.566 \| good	0.11 \| good	21.199 \| good	0.181 \| good
2026-03-29T22:00:00.000Z	38 \| good	6.798 \| good	26.369 \| good	32.694 \| good	0.11 \| good	20.512 \| good	0.184 \| good
2026-03-29T23:00:00.000Z	44 \| good	7.524 \| good	25.126 \| good	27.909 \| good	0.207 \| good	29.575 \| good	0.184 \| good
2026-03-29T23:00:00.000Z	38 \| good	6.798 \| good	26.369 \| good	32.694 \| good	0.11 \| good	20.512 \| good	0.184 \| good
2026-03-29T23:00:00.000Z	44 \| good	7.88 \| good	34.711 \| good	36.43 \| good	0.429 \| good	4.516 \| good	0.179 \| good
2026-03-30T00:00:00.000Z	38 \| good	7.063 \| good	31.465 \| good	30.853 \| good	0.465 \| good	5.591 \| good	0.187 \| good
2026-03-30T01:00:00.000Z	33 \| good	5.931 \| good	26.581 \| good	29.249 \| good	0.611 \| good	5.661 \| good	0.188 \| good
2026-03-30T02:00:00.000Z	44 \| good	8.244 \| good	36.298 \| good	29.039 \| good	0.756 \| good	5.732 \| good	0.188 \| good
2026-03-30T03:00:00.000Z	54 \| moderate	10.668 \| good	47.549 \| good	29.127 \| good	0.902 \| good	5.802 \| good	0.189 \| good
2026-03-30T04:00:00.000Z	49 \| good	9.249 \| good	41.517 \| good	31.368 \| good	1.12 \| good	5.567 \| good	0.192 \| good
2026-03-30T05:00:00.000Z	49 \| good	8.592 \| good	37.767 \| good	31.335 \| good	1.339 \| good	5.332 \| good	0.195 \| good
2026-03-30T06:00:00.000Z	44 \| good	8.429 \| good	36.908 \| good	27.955 \| good	1.558 \| good	5.097 \| good	0.198 \| good
2026-03-30T07:00:00.000Z	49 \| good	8.854 \| good	38.851 \| good	22.974 \| good	1.496 \| good	4.585 \| good	0.196 \| good
2026-03-30T08:00:00.000Z	44 \| good	7.97 \| good	34.832 \| good	23.378 \| good	1.435 \| good	4.074 \| good	0.193 \| good
2026-03-30T09:00:00.000Z	38 \| good	6.662 \| good	29.57 \| good	24.889 \| good	1.373 \| good	3.563 \| good	0.19 \| good
2026-03-30T10:00:00.000Z	49 \| good	9.141 \| good	40.713 \| good	22.388 \| good	1.216 \| good	3.731 \| good	0.182 \| good
2026-03-30T11:00:00.000Z	52 \| moderate	9.62 \| good	42.612 \| good	22.924 \| good	1.059 \| good	3.9 \| good	0.175 \| good
2026-03-30T12:00:00.000Z	52 \| moderate	9.649 \| good	42.919 \| good	26.176 \| good	0.903 \| good	4.068 \| good	0.167 \| good
2026-03-30T13:00:00.000Z	44 \| good	8.269 \| good	36.487 \| good	30.904 \| good	1.01 \| good	3.882 \| good	0.171 \| good
2026-03-30T14:00:00.000Z	44 \| good	7.88 \| good	34.73 \| good	36.451 \| good	1.117 \| good	3.696 \| good	0.175 \| good
2026-03-30T15:00:00.000Z	44 \| good	8.358 \| good	36.742 \| good	33.62 \| good	1.224 \| good	3.51 \| good	0.179 \| good
2026-03-30T16:00:00.000Z	52 \| moderate	10.246 \| good	45.159 \| good	37.798 \| good	1.305 \| good	3.318 \| good	0.18 \| good
2026-03-30T17:00:00.000Z	54 \| moderate	10.743 \| good	47.641 \| good	37.978 \| good	1.385 \| good	3.126 \| good	0.181 \| good
2026-03-30T18:00:00.000Z	60 \| moderate	13.942 \| fine	62.966 \| fine	43.263 \| good	1.466 \| good	2.933 \| good	0.182 \| good
2026-03-30T19:00:00.000Z	60 \| moderate	13.703 \| fine	61.244 \| fine	43.357 \| good	1.377 \| good	3.068 \| good	0.182 \| good
2026-03-30T20:00:00.000Z	56 \| moderate	11.954 \| good	53.177 \| good	43.415 \| good	1.288 \| good	3.203 \| good	0.182 \| good
2026-03-30T21:00:00.000Z	56 \| moderate	12.239 \| fine	55.239 \| fine	42.67 \| good	1.199 \| good	3.337 \| good	0.182 \| good
2026-03-30T22:00:00.000Z	58 \| moderate	12.696 \| fine	57.315 \| fine	41.687 \| good	1.137 \| good	3.654 \| good	0.182 \| good
2026-03-30T23:00:00.000Z	52 \| moderate	10.314 \| good	45.507 \| good	35.664 \| good	1.075 \| good	3.972 \| good	0.181 \| good
2026-03-31T00:00:00.000Z	52 \| moderate	10.118 \| good	45.297 \| good	36.557 \| good	1.013 \| good	4.289 \| good	0.18 \| good
2026-03-31T01:00:00.000Z	54 \| moderate	10.509 \| good	46.426 \| good	33.507 \| good	0.997 \| good	4.183 \| good	0.181 \| good
2026-03-31T02:00:00.000Z	54 \| moderate	11.339 \| good	50.072 \| good	31.643 \| good	0.982 \| good	4.076 \| good	0.181 \| good
2026-03-31T03:00:00.000Z	56 \| moderate	11.812 \| good	52.328 \| good	29.673 \| good	0.967 \| good	3.97 \| good	0.182 \| good
2026-03-31T04:00:00.000Z	52 \| moderate	9.911 \| good	44.128 \| good	28.086 \| good	0.977 \| good	3.775 \| good	0.182 \| good
2026-03-31T05:00:00.000Z	44 \| good	8.206 \| good	36.128 \| good	27.278 \| good	0.986 \| good	3.58 \| good	0.182 \| good
2026-03-31T06:00:00.000Z	56 \| moderate	12.282 \| fine	15.026 \| good	39.679 \| good	1 \| good	3.4 \| good	0.182 \| good
2026-03-31T07:00:00.000Z	58 \| moderate	13.412 \| fine	61.057 \| fine	26.586 \| good	1.013 \| good	3.34 \| good	0.182 \| good
2026-03-31T08:00:00.000Z	54 \| moderate	11.47 \| good	51.042 \| good	30.417 \| good	1.03 \| good	3.295 \| good	0.182 \| good
2026-03-31T09:00:00.000Z	44 \| good	8.42 \| good	36.589 \| good	32.184 \| good	1.047 \| good	3.251 \| good	0.182 \| good
2026-03-31T10:00:00.000Z	54 \| moderate	10.576 \| good	46.658 \| good	20.105 \| good	0.989 \| good	3.397 \| good	0.185 \| good
2026-03-31T11:00:00.000Z	56 \| moderate	12.342 \| fine	55.851 \| fine	22.109 \| good	0.931 \| good	3.542 \| good	0.187 \| good
2026-03-31T12:00:00.000Z	66 \| moderate	16.741 \| fine	19.452 \| good	37.566 \| good	0.878 \| good	3.713 \| good	0.19 \| good
2026-03-31T13:00:00.000Z	64 \| moderate	15.544 \| fine	18.009 \| good	38.708 \| good	0.754 \| good	3.281 \| good	0.188 \| good
2026-03-31T14:00:00.000Z	60 \| moderate	14.46 \| fine	16.871 \| good	39.85 \| good	0.631 \| good	2.848 \| good	0.186 \| good
2026-03-31T15:00:00.000Z	58 \| moderate	13.459 \| fine	15.714 \| good	40.992 \| good	0.507 \| good	2.416 \| good	0.185 \| good
2026-03-31T16:00:00.000Z	58 \| moderate	12.876 \| fine	15.104 \| good	41.896 \| good	0.437 \| good	2.11 \| good	0.182 \| good
2026-03-31T17:00:00.000Z	36 \| good	4.376 \| good	19 \| good	39.249 \| good	0.367 \| good	1.808 \| good	0.178 \| good
2026-03-31T18:00:00.000Z	49 \| good	8.748 \| good	10.702 \| good	43.705 \| good	0.296 \| good	1.5 \| good	0.175 \| good
2026-03-31T19:00:00.000Z	41 \| good	6.835 \| good	8.634 \| good	44.291 \| good	0.27 \| good	1.514 \| good	0.172 \| good
2026-03-31T20:00:00.000Z	42 \| good	6.3 \| good	8.071 \| good	44.878 \| good	0.244 \| good	1.529 \| good	0.169 \| good
2026-03-31T21:00:00.000Z	42 \| good	6.254 \| good	8.048 \| good	45.464 \| good	0.217 \| good	1.544 \| good	0.167 \| good
2026-03-31T22:00:00.000Z	42 \| good	6.205 \| good	8.024 \| good	44.739 \| good	0.234 \| good	1.781 \| good	0.168 \| good

Portland

Get reliable air quality data to drive your business

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

0.18ppm

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

Air quality levels in US

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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 07:00:00 on 2026-03-29.

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 03:00:00 on 2026-03-29.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 33, 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 6.067 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 24.806 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 0.181 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.11 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 33.566 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 21.199 ppb.

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