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

The PM10 concentration in Portland, Maine is 98.164 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 0.641 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 34.855 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 9.901 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 11.887 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)

11.89 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

98.16 μg/m³

155

255

425

605+

Ozone (O₃)

34.85 ppb

201

201+

Sulfur Dioxide (SO₂)

0.64 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.90 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.25 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
2025-12-26T22:00:00.000Z	38 \| good	7.132 \| good	14.096 \| good	34.609 \| good	0.569 \| good	4.468 \| good	0.208 \| good
2025-12-26T23:00:00.000Z	33 \| good	6.373 \| good	15.506 \| good	32.076 \| good	0.617 \| good	6.25 \| good	0.264 \| good
2025-12-27T00:00:00.000Z	38 \| good	7.198 \| good	17.966 \| good	31.08 \| good	0.629 \| good	13.44 \| good	0.25 \| good
2025-12-27T01:00:00.000Z	52 \| moderate	9.962 \| good	20.575 \| good	28.552 \| good	0.684 \| good	7.516 \| good	0.286 \| good
2025-12-27T02:00:00.000Z	54 \| moderate	11.177 \| good	32.915 \| good	25.88 \| good	0.634 \| good	7.033 \| good	0.272 \| good
2025-12-27T03:00:00.000Z	49 \| good	8.58 \| good	14.997 \| good	24.719 \| good	0.601 \| good	10.403 \| good	0.272 \| good
2025-12-27T04:00:00.000Z	44 \| good	8.319 \| good	29.492 \| good	24.467 \| good	0.619 \| good	8.724 \| good	0.272 \| good
2025-12-27T05:00:00.000Z	44 \| good	7.889 \| good	33.554 \| good	26.097 \| good	0.637 \| good	8.073 \| good	0.212 \| good
2025-12-27T06:00:00.000Z	38 \| good	6.868 \| good	24.5 \| good	26.212 \| good	0.635 \| good	7.937 \| good	0.193 \| good
2025-12-27T07:00:00.000Z	33 \| good	6.336 \| good	24.08 \| good	27.872 \| good	0.634 \| good	6.976 \| good	0.193 \| good
2025-12-27T08:00:00.000Z	27 \| good	4.944 \| good	20.502 \| good	28.344 \| good	0.551 \| good	4.676 \| good	0.193 \| good
2025-12-27T09:00:00.000Z	29 \| good	4.076 \| good	14.351 \| good	30.894 \| good	0.596 \| good	7.622 \| good	0.174 \| good
2025-12-27T10:00:00.000Z	27 \| good	3.217 \| good	15.411 \| good	28.524 \| good	0.516 \| good	5.761 \| good	0.189 \| good
2025-12-27T11:00:00.000Z	23 \| good	2.712 \| good	13.907 \| good	24.722 \| good	0.549 \| good	3.352 \| good	0.174 \| good
2025-12-27T12:00:00.000Z	29 \| good	2.81 \| good	8.612 \| good	30.535 \| good	0.549 \| good	3.299 \| good	0.174 \| good
2025-12-27T13:00:00.000Z	31 \| good	2.922 \| good	8.375 \| good	32.656 \| good	0.549 \| good	2.871 \| good	0.2 \| good
2025-12-27T14:00:00.000Z	31 \| good	4.158 \| good	17.762 \| good	34.419 \| good	0.529 \| good	3.027 \| good	0.222 \| good
2025-12-27T15:00:00.000Z	31 \| good	4.875 \| good	24.743 \| good	32.981 \| good	0.548 \| good	3.548 \| good	0.248 \| good
2025-12-27T16:00:00.000Z	31 \| good	5.105 \| good	20.1 \| good	33.51 \| good	0.568 \| good	3.083 \| good	0.219 \| good
2025-12-27T17:00:00.000Z	38 \| good	6.848 \| good	32.614 \| good	33.83 \| good	0.634 \| good	2.575 \| good	0.233 \| good
2025-12-27T18:00:00.000Z	38 \| good	7.422 \| good	36.721 \| good	34.653 \| good	0.666 \| good	3.112 \| good	0.193 \| good
2025-12-27T19:00:00.000Z	44 \| good	8.271 \| good	32.308 \| good	33.489 \| good	0.633 \| good	4.159 \| good	0.193 \| good
2025-12-27T20:00:00.000Z	44 \| good	8.21 \| good	33.111 \| good	32.011 \| good	0.613 \| good	5.145 \| good	0.193 \| good
2025-12-27T21:00:00.000Z	44 \| good	7.759 \| good	35.723 \| good	34.227 \| good	0.608 \| good	5.231 \| good	0.227 \| good
2025-12-27T22:00:00.000Z	49 \| good	8.738 \| good	18.555 \| good	33.095 \| good	0.546 \| good	5.421 \| good	0.26 \| good
2025-12-27T23:00:00.000Z	52 \| moderate	10.112 \| good	16.836 \| good	33.366 \| good	0.56 \| good	13.275 \| good	0.265 \| good
2025-12-28T00:00:00.000Z	52 \| moderate	9.862 \| good	31.222 \| good	28.704 \| good	0.602 \| good	26.909 \| good	0.317 \| good
2025-12-28T01:00:00.000Z	52 \| moderate	9.596 \| good	35.067 \| good	23.016 \| good	0.52 \| good	27.492 \| good	0.389 \| good
2025-12-28T02:00:00.000Z	60 \| moderate	14.061 \| fine	42.48 \| good	16.469 \| good	0.545 \| good	24.971 \| good	0.415 \| good
2025-12-28T03:00:00.000Z	49 \| good	9.309 \| good	41.479 \| good	13.777 \| good	0.557 \| good	14.097 \| good	0.287 \| good
2025-12-28T04:00:00.000Z	60 \| moderate	13.606 \| fine	47.92 \| good	7.812 \| good	0.544 \| good	19.899 \| good	0.286 \| good
2025-12-28T05:00:00.000Z	56 \| moderate	11.578 \| good	15.129 \| good	9.034 \| good	0.527 \| good	21.543 \| good	0.286 \| good
2025-12-28T06:00:00.000Z	56 \| moderate	11.97 \| good	19.454 \| good	7.916 \| good	0.582 \| good	17.958 \| good	0.272 \| good
2025-12-28T07:00:00.000Z	58 \| moderate	13.029 \| fine	16.789 \| good	7.723 \| good	0.582 \| good	18.564 \| good	0.272 \| good
2025-12-28T08:00:00.000Z	58 \| moderate	13.071 \| fine	25.086 \| good	10.14 \| good	0.568 \| good	16.21 \| good	0.276 \| good
2025-12-28T09:00:00.000Z	58 \| moderate	12.692 \| fine	27.067 \| good	7.483 \| good	0.582 \| good	18.812 \| good	0.324 \| good
2025-12-28T10:00:00.000Z	54 \| moderate	11.143 \| good	27.226 \| good	7.288 \| good	0.568 \| good	19.201 \| good	0.324 \| good
2025-12-28T11:00:00.000Z	54 \| moderate	11.121 \| good	19.699 \| good	7.435 \| good	0.617 \| good	17.85 \| good	0.324 \| good
2025-12-28T12:00:00.000Z	54 \| moderate	11.034 \| good	22.368 \| good	9.286 \| good	0.651 \| good	12.274 \| good	0.309 \| good
2025-12-28T13:00:00.000Z	52 \| moderate	9.658 \| good	32.26 \| good	12.694 \| good	0.652 \| good	13.69 \| good	0.378 \| good
2025-12-28T14:00:00.000Z	44 \| good	8.31 \| good	15.71 \| good	21.566 \| good	0.714 \| good	19.581 \| good	0.317 \| good
2025-12-28T15:00:00.000Z	52 \| moderate	10.105 \| good	37.984 \| good	24.097 \| good	1.138 \| good	10.427 \| good	0.269 \| good
2025-12-28T16:00:00.000Z	54 \| moderate	11.483 \| good	55.602 \| fine	22.871 \| good	0.969 \| good	11.009 \| good	0.254 \| good
2025-12-28T17:00:00.000Z	52 \| moderate	10.325 \| good	21.462 \| good	32.694 \| good	1.569 \| good	7.911 \| good	0.235 \| good
2025-12-28T18:00:00.000Z	54 \| moderate	10.807 \| good	13.499 \| good	28.484 \| good	1.11 \| good	6.03 \| good	0.209 \| good
2025-12-28T19:00:00.000Z	44 \| good	8.288 \| good	29.644 \| good	32.358 \| good	1.104 \| good	8.513 \| good	0.209 \| good
2025-12-28T20:00:00.000Z	44 \| good	8.263 \| good	44.775 \| good	32.337 \| good	0.644 \| good	9.971 \| good	0.25 \| good
2025-12-28T21:00:00.000Z	72 \| moderate	11.887 \| good	98.164 \| fine	34.855 \| good	0.641 \| good	9.901 \| good	0.253 \| good
2025-12-28T22:00:00.000Z	49 \| good	9.499 \| good	42.409 \| good	19.903 \| good	0.659 \| good	9.487 \| good	0.222 \| good
2025-12-28T23:00:00.000Z	54 \| moderate	11.178 \| good	49.362 \| good	19.971 \| good	0.682 \| good	11.125 \| good	0.239 \| good
2025-12-29T00:00:00.000Z	60 \| moderate	13.536 \| fine	60.268 \| fine	13.543 \| good	0.705 \| good	12.762 \| good	0.256 \| good
2025-12-29T01:00:00.000Z	60 \| moderate	13.728 \| fine	62.159 \| fine	14.63 \| good	0.814 \| good	13.644 \| good	0.264 \| good
2025-12-29T02:00:00.000Z	58 \| moderate	13.07 \| fine	58.44 \| fine	12.622 \| good	0.923 \| good	14.527 \| good	0.272 \| good
2025-12-29T03:00:00.000Z	62 \| moderate	14.885 \| fine	66.337 \| fine	12.175 \| good	1.032 \| good	15.409 \| good	0.28 \| good
2025-12-29T04:00:00.000Z	64 \| moderate	16.342 \| fine	72.271 \| fine	8.417 \| good	1.036 \| good	15.016 \| good	0.273 \| good
2025-12-29T05:00:00.000Z	66 \| moderate	16.914 \| fine	75.791 \| fine	8.688 \| good	1.04 \| good	14.623 \| good	0.267 \| good
2025-12-29T06:00:00.000Z	67 \| moderate	17.571 \| fine	78.176 \| fine	9.334 \| good	1.044 \| good	14.229 \| good	0.26 \| good
2025-12-29T07:00:00.000Z	67 \| moderate	17.947 \| fine	78.739 \| fine	8.445 \| good	1.032 \| good	13.668 \| good	0.245 \| good
2025-12-29T08:00:00.000Z	64 \| moderate	16.276 \| fine	72.767 \| fine	10.827 \| good	1.02 \| good	13.106 \| good	0.23 \| good
2025-12-29T09:00:00.000Z	54 \| moderate	10.994 \| good	48.314 \| good	23.212 \| good	1.008 \| good	12.545 \| good	0.215 \| good
2025-12-29T10:00:00.000Z	44 \| good	8.188 \| good	36.116 \| good	26.809 \| good	0.747 \| good	9.335 \| good	0.194 \| good
2025-12-29T11:00:00.000Z	33 \| good	6.261 \| good	28.021 \| good	27.705 \| good	0.485 \| good	6.125 \| good	0.172 \| good
2025-12-29T12:00:00.000Z	27 \| good	4.76 \| good	21.028 \| good	28.083 \| good	0.224 \| good	2.915 \| good	0.151 \| good
2025-12-29T13:00:00.000Z	28 \| good	5.048 \| good	22.008 \| good	30.201 \| good	0.234 \| good	2.917 \| good	0.151 \| good
2025-12-29T14:00:00.000Z	38 \| good	6.561 \| good	29.081 \| good	29.705 \| good	0.243 \| good	2.92 \| good	0.151 \| good
2025-12-29T15:00:00.000Z	38 \| good	7.458 \| good	33.041 \| good	24.812 \| good	0.253 \| good	2.923 \| good	0.151 \| good
2025-12-29T16:00:00.000Z	44 \| good	8.337 \| good	36.922 \| good	20.025 \| good	0.339 \| good	4.224 \| good	0.16 \| good
2025-12-29T17:00:00.000Z	52 \| moderate	9.563 \| good	42.836 \| good	16.56 \| good	0.424 \| good	5.526 \| good	0.17 \| good
2025-12-29T18:00:00.000Z	52 \| moderate	10.387 \| good	45.843 \| good	14.758 \| good	0.51 \| good	6.828 \| good	0.179 \| good
2025-12-29T19:00:00.000Z	54 \| moderate	10.8 \| good	47.804 \| good	13.807 \| good	0.551 \| good	8.377 \| good	0.192 \| good
2025-12-29T20:00:00.000Z	54 \| moderate	11.169 \| good	49.622 \| good	12.24 \| good	0.591 \| good	9.927 \| good	0.205 \| good
2025-12-29T21:00:00.000Z	58 \| moderate	13.286 \| fine	60.441 \| fine	9.102 \| good	0.632 \| good	11.476 \| good	0.219 \| good
2025-12-29T22:00:00.000Z	56 \| moderate	12.272 \| fine	54.683 \| good	20.466 \| good	0.721 \| good	11.643 \| good	0.222 \| good
2025-12-29T23:00:00.000Z	52 \| moderate	10.323 \| good	45.739 \| good	26.33 \| good	0.811 \| good	11.811 \| good	0.226 \| good
2025-12-30T00:00:00.000Z	54 \| moderate	10.744 \| good	47.777 \| good	26.44 \| good	0.9 \| good	11.978 \| good	0.229 \| good
2025-12-30T01:00:00.000Z	49 \| good	9.247 \| good	41.081 \| good	26.268 \| good	0.681 \| good	8.63 \| good	0.214 \| good
2025-12-30T02:00:00.000Z	38 \| good	6.648 \| good	29.913 \| good	20.675 \| good	0.461 \| good	5.282 \| good	0.199 \| good
2025-12-30T03:00:00.000Z	33 \| good	5.839 \| good	24.988 \| good	20.445 \| good	0.242 \| good	1.934 \| good	0.184 \| good
2025-12-30T04:00:00.000Z	22 \| good	4.251 \| good	18.833 \| good	19.003 \| good	0.251 \| good	1.73 \| good	0.175 \| good
2025-12-30T05:00:00.000Z	22 \| good	3.636 \| good	16 \| good	20.341 \| good	0.259 \| good	1.526 \| good	0.166 \| good
2025-12-30T06:00:00.000Z	19 \| good	3.028 \| good	12.05 \| good	19.844 \| good	0.268 \| good	1.322 \| good	0.156 \| good
2025-12-30T07:00:00.000Z	19 \| good	2.191 \| good	8.98 \| good	20.207 \| good	0.253 \| good	1.181 \| good	0.151 \| good
2025-12-30T08:00:00.000Z	20 \| good	1.139 \| good	4.988 \| good	21.784 \| good	0.237 \| good	1.04 \| good	0.146 \| good
2025-12-30T09:00:00.000Z	21 \| good	0.889 \| good	3.08 \| good	22.77 \| good	0.222 \| good	0.899 \| good	0.14 \| good
2025-12-30T10:00:00.000Z	19 \| good	0.638 \| good	2.034 \| good	21.288 \| good	0.194 \| good	0.888 \| good	0.138 \| good
2025-12-30T11:00:00.000Z	19 \| good	0.67 \| good	2.093 \| good	20.133 \| good	0.166 \| good	0.877 \| good	0.137 \| good
2025-12-30T12:00:00.000Z	20 \| good	1.697 \| good	6.945 \| good	21.842 \| good	0.139 \| good	0.867 \| good	0.135 \| good
2025-12-30T13:00:00.000Z	23 \| good	2.031 \| good	8.04 \| good	24.76 \| good	0.133 \| good	0.738 \| good	0.135 \| good
2025-12-30T14:00:00.000Z	24 \| good	2.868 \| good	11.873 \| good	26.059 \| good	0.126 \| good	0.61 \| good	0.134 \| good
2025-12-30T15:00:00.000Z	25 \| good	2.871 \| good	11.9 \| good	26.954 \| good	0.12 \| good	0.481 \| good	0.134 \| good
2025-12-30T16:00:00.000Z	27 \| good	2.399 \| good	9.939 \| good	28.599 \| good	0.117 \| good	0.471 \| good	0.134 \| good
2025-12-30T17:00:00.000Z	27 \| good	2.618 \| good	10.88 \| good	28.672 \| good	0.114 \| good	0.46 \| good	0.133 \| good
2025-12-30T18:00:00.000Z	27 \| good	2.881 \| good	11.848 \| good	29.259 \| good	0.11 \| good	0.45 \| good	0.133 \| good
2025-12-30T19:00:00.000Z	26 \| good	2.523 \| good	10.013 \| good	28.268 \| good	0.112 \| good	0.623 \| good	0.134 \| good
2025-12-30T20:00:00.000Z	25 \| good	2.434 \| good	9.952 \| good	27.421 \| good	0.114 \| good	0.795 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	25 \| good	2.744 \| good	11.031 \| good	26.833 \| good	0.116 \| good	0.968 \| good	0.135 \| good

Portland

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

0.24ppm

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 04:00:00 on 2025-12-28.

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 08:00:00 on 2025-12-28.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 72, indicating Moderate conditions.

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

Portland, Maine air has the highest levels of PM10.

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 11.887 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 98.164 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 0.253 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.641 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 34.855 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 9.901 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-26T22:00:00.000Z	38 \| good	7.132 \| good	14.096 \| good	34.609 \| good	0.569 \| good	4.468 \| good	0.208 \| good
2025-12-26T23:00:00.000Z	33 \| good	6.373 \| good	15.506 \| good	32.076 \| good	0.617 \| good	6.25 \| good	0.264 \| good
2025-12-27T00:00:00.000Z	38 \| good	7.198 \| good	17.966 \| good	31.08 \| good	0.629 \| good	13.44 \| good	0.25 \| good
2025-12-27T01:00:00.000Z	52 \| moderate	9.962 \| good	20.575 \| good	28.552 \| good	0.684 \| good	7.516 \| good	0.286 \| good
2025-12-27T02:00:00.000Z	54 \| moderate	11.177 \| good	32.915 \| good	25.88 \| good	0.634 \| good	7.033 \| good	0.272 \| good
2025-12-27T03:00:00.000Z	49 \| good	8.58 \| good	14.997 \| good	24.719 \| good	0.601 \| good	10.403 \| good	0.272 \| good
2025-12-27T04:00:00.000Z	44 \| good	8.319 \| good	29.492 \| good	24.467 \| good	0.619 \| good	8.724 \| good	0.272 \| good
2025-12-27T05:00:00.000Z	44 \| good	7.889 \| good	33.554 \| good	26.097 \| good	0.637 \| good	8.073 \| good	0.212 \| good
2025-12-27T06:00:00.000Z	38 \| good	6.868 \| good	24.5 \| good	26.212 \| good	0.635 \| good	7.937 \| good	0.193 \| good
2025-12-27T07:00:00.000Z	33 \| good	6.336 \| good	24.08 \| good	27.872 \| good	0.634 \| good	6.976 \| good	0.193 \| good
2025-12-27T08:00:00.000Z	27 \| good	4.944 \| good	20.502 \| good	28.344 \| good	0.551 \| good	4.676 \| good	0.193 \| good
2025-12-27T09:00:00.000Z	29 \| good	4.076 \| good	14.351 \| good	30.894 \| good	0.596 \| good	7.622 \| good	0.174 \| good
2025-12-27T10:00:00.000Z	27 \| good	3.217 \| good	15.411 \| good	28.524 \| good	0.516 \| good	5.761 \| good	0.189 \| good
2025-12-27T11:00:00.000Z	23 \| good	2.712 \| good	13.907 \| good	24.722 \| good	0.549 \| good	3.352 \| good	0.174 \| good
2025-12-27T12:00:00.000Z	29 \| good	2.81 \| good	8.612 \| good	30.535 \| good	0.549 \| good	3.299 \| good	0.174 \| good
2025-12-27T13:00:00.000Z	31 \| good	2.922 \| good	8.375 \| good	32.656 \| good	0.549 \| good	2.871 \| good	0.2 \| good
2025-12-27T14:00:00.000Z	31 \| good	4.158 \| good	17.762 \| good	34.419 \| good	0.529 \| good	3.027 \| good	0.222 \| good
2025-12-27T15:00:00.000Z	31 \| good	4.875 \| good	24.743 \| good	32.981 \| good	0.548 \| good	3.548 \| good	0.248 \| good
2025-12-27T16:00:00.000Z	31 \| good	5.105 \| good	20.1 \| good	33.51 \| good	0.568 \| good	3.083 \| good	0.219 \| good
2025-12-27T17:00:00.000Z	38 \| good	6.848 \| good	32.614 \| good	33.83 \| good	0.634 \| good	2.575 \| good	0.233 \| good
2025-12-27T18:00:00.000Z	38 \| good	7.422 \| good	36.721 \| good	34.653 \| good	0.666 \| good	3.112 \| good	0.193 \| good
2025-12-27T19:00:00.000Z	44 \| good	8.271 \| good	32.308 \| good	33.489 \| good	0.633 \| good	4.159 \| good	0.193 \| good
2025-12-27T20:00:00.000Z	44 \| good	8.21 \| good	33.111 \| good	32.011 \| good	0.613 \| good	5.145 \| good	0.193 \| good
2025-12-27T21:00:00.000Z	44 \| good	7.759 \| good	35.723 \| good	34.227 \| good	0.608 \| good	5.231 \| good	0.227 \| good
2025-12-27T22:00:00.000Z	49 \| good	8.738 \| good	18.555 \| good	33.095 \| good	0.546 \| good	5.421 \| good	0.26 \| good
2025-12-27T23:00:00.000Z	52 \| moderate	10.112 \| good	16.836 \| good	33.366 \| good	0.56 \| good	13.275 \| good	0.265 \| good
2025-12-28T00:00:00.000Z	52 \| moderate	9.862 \| good	31.222 \| good	28.704 \| good	0.602 \| good	26.909 \| good	0.317 \| good
2025-12-28T01:00:00.000Z	52 \| moderate	9.596 \| good	35.067 \| good	23.016 \| good	0.52 \| good	27.492 \| good	0.389 \| good
2025-12-28T02:00:00.000Z	60 \| moderate	14.061 \| fine	42.48 \| good	16.469 \| good	0.545 \| good	24.971 \| good	0.415 \| good
2025-12-28T03:00:00.000Z	49 \| good	9.309 \| good	41.479 \| good	13.777 \| good	0.557 \| good	14.097 \| good	0.287 \| good
2025-12-28T04:00:00.000Z	60 \| moderate	13.606 \| fine	47.92 \| good	7.812 \| good	0.544 \| good	19.899 \| good	0.286 \| good
2025-12-28T05:00:00.000Z	56 \| moderate	11.578 \| good	15.129 \| good	9.034 \| good	0.527 \| good	21.543 \| good	0.286 \| good
2025-12-28T06:00:00.000Z	56 \| moderate	11.97 \| good	19.454 \| good	7.916 \| good	0.582 \| good	17.958 \| good	0.272 \| good
2025-12-28T07:00:00.000Z	58 \| moderate	13.029 \| fine	16.789 \| good	7.723 \| good	0.582 \| good	18.564 \| good	0.272 \| good
2025-12-28T08:00:00.000Z	58 \| moderate	13.071 \| fine	25.086 \| good	10.14 \| good	0.568 \| good	16.21 \| good	0.276 \| good
2025-12-28T09:00:00.000Z	58 \| moderate	12.692 \| fine	27.067 \| good	7.483 \| good	0.582 \| good	18.812 \| good	0.324 \| good
2025-12-28T10:00:00.000Z	54 \| moderate	11.143 \| good	27.226 \| good	7.288 \| good	0.568 \| good	19.201 \| good	0.324 \| good
2025-12-28T11:00:00.000Z	54 \| moderate	11.121 \| good	19.699 \| good	7.435 \| good	0.617 \| good	17.85 \| good	0.324 \| good
2025-12-28T12:00:00.000Z	54 \| moderate	11.034 \| good	22.368 \| good	9.286 \| good	0.651 \| good	12.274 \| good	0.309 \| good
2025-12-28T13:00:00.000Z	52 \| moderate	9.658 \| good	32.26 \| good	12.694 \| good	0.652 \| good	13.69 \| good	0.378 \| good
2025-12-28T14:00:00.000Z	44 \| good	8.31 \| good	15.71 \| good	21.566 \| good	0.714 \| good	19.581 \| good	0.317 \| good
2025-12-28T15:00:00.000Z	52 \| moderate	10.105 \| good	37.984 \| good	24.097 \| good	1.138 \| good	10.427 \| good	0.269 \| good
2025-12-28T16:00:00.000Z	54 \| moderate	11.483 \| good	55.602 \| fine	22.871 \| good	0.969 \| good	11.009 \| good	0.254 \| good
2025-12-28T17:00:00.000Z	52 \| moderate	10.325 \| good	21.462 \| good	32.694 \| good	1.569 \| good	7.911 \| good	0.235 \| good
2025-12-28T18:00:00.000Z	54 \| moderate	10.807 \| good	13.499 \| good	28.484 \| good	1.11 \| good	6.03 \| good	0.209 \| good
2025-12-28T19:00:00.000Z	44 \| good	8.288 \| good	29.644 \| good	32.358 \| good	1.104 \| good	8.513 \| good	0.209 \| good
2025-12-28T20:00:00.000Z	44 \| good	8.263 \| good	44.775 \| good	32.337 \| good	0.644 \| good	9.971 \| good	0.25 \| good
2025-12-28T21:00:00.000Z	72 \| moderate	11.887 \| good	98.164 \| fine	34.855 \| good	0.641 \| good	9.901 \| good	0.253 \| good
2025-12-28T22:00:00.000Z	49 \| good	9.499 \| good	42.409 \| good	19.903 \| good	0.659 \| good	9.487 \| good	0.222 \| good
2025-12-28T23:00:00.000Z	54 \| moderate	11.178 \| good	49.362 \| good	19.971 \| good	0.682 \| good	11.125 \| good	0.239 \| good
2025-12-29T00:00:00.000Z	60 \| moderate	13.536 \| fine	60.268 \| fine	13.543 \| good	0.705 \| good	12.762 \| good	0.256 \| good
2025-12-29T01:00:00.000Z	60 \| moderate	13.728 \| fine	62.159 \| fine	14.63 \| good	0.814 \| good	13.644 \| good	0.264 \| good
2025-12-29T02:00:00.000Z	58 \| moderate	13.07 \| fine	58.44 \| fine	12.622 \| good	0.923 \| good	14.527 \| good	0.272 \| good
2025-12-29T03:00:00.000Z	62 \| moderate	14.885 \| fine	66.337 \| fine	12.175 \| good	1.032 \| good	15.409 \| good	0.28 \| good
2025-12-29T04:00:00.000Z	64 \| moderate	16.342 \| fine	72.271 \| fine	8.417 \| good	1.036 \| good	15.016 \| good	0.273 \| good
2025-12-29T05:00:00.000Z	66 \| moderate	16.914 \| fine	75.791 \| fine	8.688 \| good	1.04 \| good	14.623 \| good	0.267 \| good
2025-12-29T06:00:00.000Z	67 \| moderate	17.571 \| fine	78.176 \| fine	9.334 \| good	1.044 \| good	14.229 \| good	0.26 \| good
2025-12-29T07:00:00.000Z	67 \| moderate	17.947 \| fine	78.739 \| fine	8.445 \| good	1.032 \| good	13.668 \| good	0.245 \| good
2025-12-29T08:00:00.000Z	64 \| moderate	16.276 \| fine	72.767 \| fine	10.827 \| good	1.02 \| good	13.106 \| good	0.23 \| good
2025-12-29T09:00:00.000Z	54 \| moderate	10.994 \| good	48.314 \| good	23.212 \| good	1.008 \| good	12.545 \| good	0.215 \| good
2025-12-29T10:00:00.000Z	44 \| good	8.188 \| good	36.116 \| good	26.809 \| good	0.747 \| good	9.335 \| good	0.194 \| good
2025-12-29T11:00:00.000Z	33 \| good	6.261 \| good	28.021 \| good	27.705 \| good	0.485 \| good	6.125 \| good	0.172 \| good
2025-12-29T12:00:00.000Z	27 \| good	4.76 \| good	21.028 \| good	28.083 \| good	0.224 \| good	2.915 \| good	0.151 \| good
2025-12-29T13:00:00.000Z	28 \| good	5.048 \| good	22.008 \| good	30.201 \| good	0.234 \| good	2.917 \| good	0.151 \| good
2025-12-29T14:00:00.000Z	38 \| good	6.561 \| good	29.081 \| good	29.705 \| good	0.243 \| good	2.92 \| good	0.151 \| good
2025-12-29T15:00:00.000Z	38 \| good	7.458 \| good	33.041 \| good	24.812 \| good	0.253 \| good	2.923 \| good	0.151 \| good
2025-12-29T16:00:00.000Z	44 \| good	8.337 \| good	36.922 \| good	20.025 \| good	0.339 \| good	4.224 \| good	0.16 \| good
2025-12-29T17:00:00.000Z	52 \| moderate	9.563 \| good	42.836 \| good	16.56 \| good	0.424 \| good	5.526 \| good	0.17 \| good
2025-12-29T18:00:00.000Z	52 \| moderate	10.387 \| good	45.843 \| good	14.758 \| good	0.51 \| good	6.828 \| good	0.179 \| good
2025-12-29T19:00:00.000Z	54 \| moderate	10.8 \| good	47.804 \| good	13.807 \| good	0.551 \| good	8.377 \| good	0.192 \| good
2025-12-29T20:00:00.000Z	54 \| moderate	11.169 \| good	49.622 \| good	12.24 \| good	0.591 \| good	9.927 \| good	0.205 \| good
2025-12-29T21:00:00.000Z	58 \| moderate	13.286 \| fine	60.441 \| fine	9.102 \| good	0.632 \| good	11.476 \| good	0.219 \| good
2025-12-29T22:00:00.000Z	56 \| moderate	12.272 \| fine	54.683 \| good	20.466 \| good	0.721 \| good	11.643 \| good	0.222 \| good
2025-12-29T23:00:00.000Z	52 \| moderate	10.323 \| good	45.739 \| good	26.33 \| good	0.811 \| good	11.811 \| good	0.226 \| good
2025-12-30T00:00:00.000Z	54 \| moderate	10.744 \| good	47.777 \| good	26.44 \| good	0.9 \| good	11.978 \| good	0.229 \| good
2025-12-30T01:00:00.000Z	49 \| good	9.247 \| good	41.081 \| good	26.268 \| good	0.681 \| good	8.63 \| good	0.214 \| good
2025-12-30T02:00:00.000Z	38 \| good	6.648 \| good	29.913 \| good	20.675 \| good	0.461 \| good	5.282 \| good	0.199 \| good
2025-12-30T03:00:00.000Z	33 \| good	5.839 \| good	24.988 \| good	20.445 \| good	0.242 \| good	1.934 \| good	0.184 \| good
2025-12-30T04:00:00.000Z	22 \| good	4.251 \| good	18.833 \| good	19.003 \| good	0.251 \| good	1.73 \| good	0.175 \| good
2025-12-30T05:00:00.000Z	22 \| good	3.636 \| good	16 \| good	20.341 \| good	0.259 \| good	1.526 \| good	0.166 \| good
2025-12-30T06:00:00.000Z	19 \| good	3.028 \| good	12.05 \| good	19.844 \| good	0.268 \| good	1.322 \| good	0.156 \| good
2025-12-30T07:00:00.000Z	19 \| good	2.191 \| good	8.98 \| good	20.207 \| good	0.253 \| good	1.181 \| good	0.151 \| good
2025-12-30T08:00:00.000Z	20 \| good	1.139 \| good	4.988 \| good	21.784 \| good	0.237 \| good	1.04 \| good	0.146 \| good
2025-12-30T09:00:00.000Z	21 \| good	0.889 \| good	3.08 \| good	22.77 \| good	0.222 \| good	0.899 \| good	0.14 \| good
2025-12-30T10:00:00.000Z	19 \| good	0.638 \| good	2.034 \| good	21.288 \| good	0.194 \| good	0.888 \| good	0.138 \| good
2025-12-30T11:00:00.000Z	19 \| good	0.67 \| good	2.093 \| good	20.133 \| good	0.166 \| good	0.877 \| good	0.137 \| good
2025-12-30T12:00:00.000Z	20 \| good	1.697 \| good	6.945 \| good	21.842 \| good	0.139 \| good	0.867 \| good	0.135 \| good
2025-12-30T13:00:00.000Z	23 \| good	2.031 \| good	8.04 \| good	24.76 \| good	0.133 \| good	0.738 \| good	0.135 \| good
2025-12-30T14:00:00.000Z	24 \| good	2.868 \| good	11.873 \| good	26.059 \| good	0.126 \| good	0.61 \| good	0.134 \| good
2025-12-30T15:00:00.000Z	25 \| good	2.871 \| good	11.9 \| good	26.954 \| good	0.12 \| good	0.481 \| good	0.134 \| good
2025-12-30T16:00:00.000Z	27 \| good	2.399 \| good	9.939 \| good	28.599 \| good	0.117 \| good	0.471 \| good	0.134 \| good
2025-12-30T17:00:00.000Z	27 \| good	2.618 \| good	10.88 \| good	28.672 \| good	0.114 \| good	0.46 \| good	0.133 \| good
2025-12-30T18:00:00.000Z	27 \| good	2.881 \| good	11.848 \| good	29.259 \| good	0.11 \| good	0.45 \| good	0.133 \| good
2025-12-30T19:00:00.000Z	26 \| good	2.523 \| good	10.013 \| good	28.268 \| good	0.112 \| good	0.623 \| good	0.134 \| good
2025-12-30T20:00:00.000Z	25 \| good	2.434 \| good	9.952 \| good	27.421 \| good	0.114 \| good	0.795 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	25 \| good	2.744 \| good	11.031 \| good	26.833 \| good	0.116 \| good	0.968 \| good	0.135 \| 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

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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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Frequently asked questions

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

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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?

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Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 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?