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

The PM10 concentration in Portland, Maine is 42.358 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 0.777 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 19.926 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 6.403 ppb.

Real-time 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)

12.07 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

42.36 μg/m³

155

255

425

605+

Ozone (O₃)

19.93 ppb

201

201+

Sulfur Dioxide (SO₂)

0.78 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

6.40 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.17 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2025-06-05T12:00:00.000Z	64 \| moderate	15.693 \| fine	60.621 \| fine	23.21 \| good	0.753 \| good	9.102 \| good	0.28 \| good
2025-06-05T13:00:00.000Z	66 \| moderate	16.506 \| fine	63.507 \| fine	24.257 \| good	0.742 \| good	7.762 \| good	0.317 \| good
2025-06-05T14:00:00.000Z	66 \| moderate	16.509 \| fine	66.229 \| fine	30.287 \| good	0.72 \| good	10.016 \| good	0.333 \| good
2025-06-05T15:00:00.000Z	66 \| moderate	16.552 \| fine	66.301 \| fine	30.287 \| good	0.711 \| good	9.975 \| good	0.28 \| good
2025-06-05T16:00:00.000Z	71 \| moderate	20.368 \| fine	83.75 \| fine	51.014 \| good	0.746 \| good	9.094 \| good	0.258 \| good
2025-06-05T17:00:00.000Z	73 \| moderate	20.511 \| fine	80.957 \| fine	55.005 \| fine	0.742 \| good	6.7 \| good	0.28 \| good
2025-06-05T18:00:00.000Z	73 \| moderate	21.489 \| fine	85.913 \| fine	56.088 \| fine	0.704 \| good	6.019 \| good	0.28 \| good
2025-06-05T19:00:00.000Z	69 \| moderate	19.454 \| fine	76.846 \| fine	58.966 \| fine	0.728 \| good	5.006 \| good	0.235 \| good
2025-06-05T20:00:00.000Z	77 \| moderate	17.984 \| fine	69.682 \| fine	62.988 \| fine	0.669 \| good	2.83 \| good	0.256 \| good
2025-06-05T21:00:00.000Z	84 \| moderate	20.827 \| fine	82.503 \| fine	65.047 \| fine	0.719 \| good	2.238 \| good	0.256 \| good
2025-06-05T22:00:00.000Z	87 \| moderate	19.483 \| fine	74.853 \| fine	66.105 \| fine	0.691 \| good	2.924 \| good	0.277 \| good
2025-06-05T23:00:00.000Z	97 \| moderate	19.045 \| fine	71.219 \| fine	69.141 \| fine	0.688 \| good	3.31 \| good	0.277 \| good
2025-06-06T00:00:00.000Z	108 \| sensitive	18.875 \| fine	70.729 \| fine	73.077 \| moderate	0.739 \| good	3.216 \| good	0.301 \| good
2025-06-06T01:00:00.000Z	105 \| sensitive	17.976 \| fine	66.379 \| fine	72.141 \| moderate	0.695 \| good	3.913 \| good	0.301 \| good
2025-06-06T02:00:00.000Z	90 \| moderate	19.52 \| fine	72.996 \| fine	67.229 \| fine	0.733 \| good	4.413 \| good	0.301 \| good
2025-06-06T03:00:00.000Z	71 \| moderate	20.103 \| fine	75.271 \| fine	58.383 \| fine	0.727 \| good	9.731 \| good	0.317 \| good
2025-06-06T04:00:00.000Z	75 \| moderate	22.445 \| fine	83.802 \| fine	60.24 \| fine	0.735 \| good	6.124 \| good	0.303 \| good
2025-06-06T05:00:00.000Z	79 \| moderate	23.629 \| fine	87.292 \| fine	52.343 \| good	0.695 \| good	6.189 \| good	0.271 \| good
2025-06-06T06:00:00.000Z	73 \| moderate	21.494 \| fine	77.223 \| fine	42.302 \| good	0.695 \| good	6.992 \| good	0.208 \| good
2025-06-06T07:00:00.000Z	71 \| moderate	20.018 \| fine	71.684 \| fine	37.338 \| good	0.757 \| good	3.236 \| good	0.219 \| good
2025-06-06T08:00:00.000Z	69 \| moderate	19.005 \| fine	69.368 \| fine	33.35 \| good	0.791 \| good	5.823 \| good	0.219 \| good
2025-06-06T09:00:00.000Z	67 \| moderate	17.977 \| fine	65.686 \| fine	29.338 \| good	0.877 \| good	3.4 \| good	0.235 \| good
2025-06-06T10:00:00.000Z	66 \| moderate	16.556 \| fine	60.349 \| fine	29.145 \| good	0.877 \| good	5.886 \| good	0.217 \| good
2025-06-06T11:00:00.000Z	60 \| moderate	13.665 \| fine	51.04 \| good	32.083 \| good	0.827 \| good	4.201 \| good	0.196 \| good
2025-06-06T12:00:00.000Z	56 \| moderate	11.925 \| good	43.867 \| good	28.128 \| good	0.848 \| good	6.884 \| good	0.212 \| good
2025-06-06T13:00:00.000Z	56 \| moderate	11.943 \| good	44.18 \| good	28.128 \| good	0.844 \| good	6.925 \| good	0.214 \| good
2025-06-06T14:00:00.000Z	54 \| moderate	11.297 \| good	41.887 \| good	27.036 \| good	0.783 \| good	6.724 \| good	0.196 \| good
2025-06-06T15:00:00.000Z	54 \| moderate	11.196 \| good	41.323 \| good	28.911 \| good	0.788 \| good	4.605 \| good	0.196 \| good
2025-06-06T16:00:00.000Z	56 \| moderate	12.193 \| fine	45.38 \| good	29.024 \| good	0.75 \| good	4.231 \| good	0.196 \| good
2025-06-06T17:00:00.000Z	58 \| moderate	13.005 \| fine	49.863 \| good	32.934 \| good	0.711 \| good	4.3 \| good	0.174 \| good
2025-06-06T18:00:00.000Z	60 \| moderate	14.177 \| fine	54.187 \| good	30.967 \| good	0.699 \| good	3.108 \| good	0.196 \| good
2025-06-06T19:00:00.000Z	62 \| moderate	14.885 \| fine	55.748 \| fine	32.913 \| good	0.585 \| good	2.253 \| good	0.246 \| good
2025-06-06T20:00:00.000Z	62 \| moderate	15.062 \| fine	55.471 \| fine	34.858 \| good	0.794 \| good	2.129 \| good	0.209 \| good
2025-06-06T21:00:00.000Z	60 \| moderate	14.201 \| fine	52.628 \| good	34.86 \| good	0.886 \| good	2.539 \| good	0.253 \| good
2025-06-06T22:00:00.000Z	62 \| moderate	15.07 \| fine	55.923 \| fine	28.076 \| good	0.799 \| good	4.03 \| good	0.23 \| good
2025-06-06T23:00:00.000Z	66 \| moderate	17.243 \| fine	61.948 \| fine	27 \| good	0.817 \| good	4.03 \| good	0.209 \| good
2025-06-07T00:00:00.000Z	67 \| moderate	18.096 \| fine	63.923 \| fine	19.001 \| good	0.761 \| good	6.619 \| good	0.23 \| good
2025-06-07T01:00:00.000Z	62 \| moderate	15.341 \| fine	54.843 \| good	20.916 \| good	0.717 \| good	5.226 \| good	0.252 \| good
2025-06-07T02:00:00.000Z	56 \| moderate	12.383 \| fine	43.577 \| good	24.896 \| good	0.697 \| good	5.533 \| good	0.274 \| good
2025-06-07T03:00:00.000Z	56 \| moderate	12.313 \| fine	44.604 \| good	26.841 \| good	0.736 \| good	3.612 \| good	0.252 \| good
2025-06-07T04:00:00.000Z	52 \| moderate	10.44 \| good	36.889 \| good	23.913 \| good	0.771 \| good	3.118 \| good	0.236 \| good
2025-06-07T05:00:00.000Z	54 \| moderate	10.735 \| good	38.854 \| good	26.812 \| good	0.787 \| good	2.22 \| good	0.169 \| good
2025-06-07T06:00:00.000Z	49 \| good	9.422 \| good	32.258 \| good	23.805 \| good	0.736 \| good	3.414 \| good	0.169 \| good
2025-06-07T07:00:00.000Z	54 \| moderate	10.602 \| good	37.364 \| good	20.903 \| good	0.669 \| good	4.503 \| good	0.217 \| good
2025-06-07T08:00:00.000Z	54 \| moderate	10.902 \| good	38.275 \| good	16.983 \| good	0.759 \| good	4.009 \| good	0.217 \| good
2025-06-07T09:00:00.000Z	60 \| moderate	13.612 \| fine	50.872 \| good	16 \| good	0.808 \| good	6.385 \| good	0.217 \| good
2025-06-07T10:00:00.000Z	56 \| moderate	12.066 \| good	42.358 \| good	19.926 \| good	0.777 \| good	6.403 \| good	0.174 \| good
2025-06-07T11:00:00.000Z	56 \| moderate	12.066 \| good	42.358 \| good	19.926 \| good	0.777 \| good	6.403 \| good	0.174 \| good
2025-06-07T12:00:00.000Z	38 \| good	7.095 \| good	31.098 \| good	26.751 \| good	0.125 \| good	3.732 \| good	0.24 \| good
2025-06-07T13:00:00.000Z	29 \| good	4.809 \| good	21.089 \| good	31.401 \| good	0.127 \| good	2.87 \| good	0.217 \| good
2025-06-07T14:00:00.000Z	29 \| good	4.925 \| good	21.312 \| good	30.822 \| good	0.142 \| good	3.236 \| good	0.214 \| good
2025-06-07T15:00:00.000Z	38 \| good	7.16 \| good	31.415 \| good	31.962 \| good	0.158 \| good	3.602 \| good	0.211 \| good
2025-06-07T16:00:00.000Z	44 \| good	7.628 \| good	33.49 \| good	31.355 \| good	0.107 \| good	2.285 \| good	0.185 \| good
2025-06-07T17:00:00.000Z	54 \| moderate	10.749 \| good	47.301 \| good	29.626 \| good	0.118 \| good	2.577 \| good	0.179 \| good
2025-06-07T18:00:00.000Z	52 \| moderate	9.833 \| good	43.99 \| good	33.075 \| good	0.129 \| good	2.868 \| good	0.174 \| good
2025-06-07T19:00:00.000Z	54 \| moderate	11.194 \| good	49.812 \| good	34.129 \| good	0.107 \| good	2.627 \| good	0.176 \| good
2025-06-07T20:00:00.000Z	58 \| moderate	12.927 \| fine	58.581 \| fine	38.937 \| good	0.115 \| good	2.852 \| good	0.167 \| good
2025-06-07T21:00:00.000Z	54 \| moderate	10.895 \| good	47.98 \| good	44.257 \| good	0.122 \| good	3.078 \| good	0.157 \| good
2025-06-07T22:00:00.000Z	52 \| moderate	10.494 \| good	46.667 \| good	45.194 \| good	0.18 \| good	3.753 \| good	0.189 \| good
2025-06-07T23:00:00.000Z	52 \| moderate	9.74 \| good	43.001 \| good	34.321 \| good	0.198 \| good	4.217 \| good	0.181 \| good
2025-06-08T00:00:00.000Z	49 \| good	8.877 \| good	38.789 \| good	28.269 \| good	0.216 \| good	4.68 \| good	0.174 \| good
2025-06-08T01:00:00.000Z	49 \| good	8.602 \| good	37.772 \| good	26.024 \| good	0.302 \| good	3.812 \| good	0.215 \| good
2025-06-08T02:00:00.000Z	49 \| good	9.302 \| good	41.75 \| good	22.036 \| good	0.338 \| good	4.213 \| good	0.208 \| good
2025-06-08T03:00:00.000Z	49 \| good	9.294 \| good	41.808 \| good	18.473 \| good	0.374 \| good	4.613 \| good	0.202 \| good
2025-06-08T04:00:00.000Z	58 \| moderate	12.836 \| fine	57.176 \| fine	15.367 \| good	0.311 \| good	3.756 \| good	0.24 \| good
2025-06-08T05:00:00.000Z	60 \| moderate	13.832 \| fine	62.64 \| fine	12.582 \| good	0.377 \| good	4.061 \| good	0.235 \| good
2025-06-08T06:00:00.000Z	62 \| moderate	15.07 \| fine	67.171 \| fine	15.295 \| good	0.443 \| good	4.366 \| good	0.229 \| good
2025-06-08T07:00:00.000Z	58 \| moderate	13.39 \| fine	60.853 \| fine	14.866 \| good	0.221 \| good	1.763 \| good	0.254 \| good
2025-06-08T08:00:00.000Z	54 \| moderate	11.335 \| good	50.068 \| good	14.31 \| good	0.301 \| good	2.014 \| good	0.252 \| good
2025-06-08T09:00:00.000Z	62 \| moderate	15.297 \| fine	68.836 \| fine	15.479 \| good	0.381 \| good	2.265 \| good	0.251 \| good
2025-06-08T10:00:00.000Z	56 \| moderate	12.346 \| fine	55.403 \| fine	16.742 \| good	0.207 \| good	1.156 \| good	0.273 \| good
2025-06-08T11:00:00.000Z	58 \| moderate	13.288 \| fine	59.386 \| fine	21.746 \| good	0.255 \| good	1.333 \| good	0.271 \| good
2025-06-08T12:00:00.000Z	58 \| moderate	13.132 \| fine	59.014 \| fine	23.164 \| good	0.304 \| good	1.509 \| good	0.27 \| good
2025-06-08T13:00:00.000Z	58 \| moderate	13.428 \| fine	60.757 \| fine	26.767 \| good	0.159 \| good	0.758 \| good	0.259 \| good
2025-06-08T14:00:00.000Z	60 \| moderate	14.362 \| fine	64.985 \| fine	30.709 \| good	0.181 \| good	0.865 \| good	0.26 \| good
2025-06-08T15:00:00.000Z	60 \| moderate	13.656 \| fine	61.264 \| fine	32.848 \| good	0.202 \| good	0.971 \| good	0.262 \| good
2025-06-08T16:00:00.000Z	56 \| moderate	11.836 \| good	52.606 \| good	33.329 \| good	0.137 \| good	0.566 \| good	0.251 \| good
2025-06-08T17:00:00.000Z	56 \| moderate	12.459 \| fine	56.778 \| fine	31.62 \| good	0.154 \| good	0.644 \| good	0.256 \| good
2025-06-08T18:00:00.000Z	54 \| moderate	10.515 \| good	46.883 \| good	33.275 \| good	0.171 \| good	0.723 \| good	0.26 \| good
2025-06-08T19:00:00.000Z	52 \| moderate	10.292 \| good	45.267 \| good	33.386 \| good	0.146 \| good	1.021 \| good	0.253 \| good
2025-06-08T20:00:00.000Z	58 \| moderate	12.776 \| fine	57.394 \| fine	36.473 \| good	0.158 \| good	1.168 \| good	0.258 \| good
2025-06-08T21:00:00.000Z	54 \| moderate	11.306 \| good	50.234 \| good	38.273 \| good	0.17 \| good	1.314 \| good	0.264 \| good
2025-06-08T22:00:00.000Z	56 \| moderate	12.306 \| fine	55.272 \| fine	37.998 \| good	0.173 \| good	3.392 \| good	0.281 \| good
2025-06-08T23:00:00.000Z	60 \| moderate	13.803 \| fine	62.613 \| fine	34.697 \| good	0.179 \| good	3.793 \| good	0.285 \| good
2025-06-09T00:00:00.000Z	64 \| moderate	15.822 \| fine	70.694 \| fine	24.912 \| good	0.185 \| good	4.194 \| good	0.289 \| good
2025-06-09T01:00:00.000Z	66 \| moderate	16.7 \| fine	74.661 \| fine	24.089 \| good	0.291 \| good	6.041 \| good	0.314 \| good
2025-06-09T02:00:00.000Z	64 \| moderate	15.859 \| fine	70.731 \| fine	27.793 \| good	0.313 \| good	6.454 \| good	0.315 \| good
2025-06-09T03:00:00.000Z	60 \| moderate	14.42 \| fine	64.731 \| fine	25.128 \| good	0.335 \| good	6.867 \| good	0.315 \| good
2025-06-09T04:00:00.000Z	66 \| moderate	16.838 \| fine	74.617 \| fine	24.702 \| good	0.267 \| good	4.236 \| good	0.302 \| good
2025-06-09T05:00:00.000Z	60 \| moderate	14.268 \| fine	63.206 \| fine	24.836 \| good	0.299 \| good	4.51 \| good	0.301 \| good
2025-06-09T06:00:00.000Z	73 \| moderate	20.598 \| fine	21.713 \| good	30.097 \| good	0.328 \| good	4.73 \| good	0.299 \| good
2025-06-09T07:00:00.000Z	60 \| moderate	14.019 \| fine	62.769 \| fine	22.817 \| good	0.304 \| good	2.355 \| good	0.277 \| good
2025-06-09T08:00:00.000Z	56 \| moderate	12.121 \| fine	54.725 \| good	22.736 \| good	0.316 \| good	2.387 \| good	0.274 \| good
2025-06-09T09:00:00.000Z	54 \| moderate	11.372 \| good	50.078 \| good	15.434 \| good	0.327 \| good	2.418 \| good	0.271 \| good
2025-06-09T10:00:00.000Z	54 \| moderate	11.184 \| good	49.833 \| good	17.678 \| good	0.289 \| good	1.247 \| good	0.249 \| good
2025-06-09T11:00:00.000Z	56 \| moderate	12.175 \| fine	54.603 \| good	22.546 \| good	0.271 \| good	1.275 \| good	0.247 \| good

Portland

Get reliable air quality data to drive your business

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

0.17ppm

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 12:00:00 on 2025-06-07.

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 06:00:00 on 2025-06-07.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 56, 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 12.066 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 42.358 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 0.174 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.777 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 19.926 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 6.403 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-05T12:00:00.000Z	64 \| moderate	15.693 \| fine	60.621 \| fine	23.21 \| good	0.753 \| good	9.102 \| good	0.28 \| good
2025-06-05T13:00:00.000Z	66 \| moderate	16.506 \| fine	63.507 \| fine	24.257 \| good	0.742 \| good	7.762 \| good	0.317 \| good
2025-06-05T14:00:00.000Z	66 \| moderate	16.509 \| fine	66.229 \| fine	30.287 \| good	0.72 \| good	10.016 \| good	0.333 \| good
2025-06-05T15:00:00.000Z	66 \| moderate	16.552 \| fine	66.301 \| fine	30.287 \| good	0.711 \| good	9.975 \| good	0.28 \| good
2025-06-05T16:00:00.000Z	71 \| moderate	20.368 \| fine	83.75 \| fine	51.014 \| good	0.746 \| good	9.094 \| good	0.258 \| good
2025-06-05T17:00:00.000Z	73 \| moderate	20.511 \| fine	80.957 \| fine	55.005 \| fine	0.742 \| good	6.7 \| good	0.28 \| good
2025-06-05T18:00:00.000Z	73 \| moderate	21.489 \| fine	85.913 \| fine	56.088 \| fine	0.704 \| good	6.019 \| good	0.28 \| good
2025-06-05T19:00:00.000Z	69 \| moderate	19.454 \| fine	76.846 \| fine	58.966 \| fine	0.728 \| good	5.006 \| good	0.235 \| good
2025-06-05T20:00:00.000Z	77 \| moderate	17.984 \| fine	69.682 \| fine	62.988 \| fine	0.669 \| good	2.83 \| good	0.256 \| good
2025-06-05T21:00:00.000Z	84 \| moderate	20.827 \| fine	82.503 \| fine	65.047 \| fine	0.719 \| good	2.238 \| good	0.256 \| good
2025-06-05T22:00:00.000Z	87 \| moderate	19.483 \| fine	74.853 \| fine	66.105 \| fine	0.691 \| good	2.924 \| good	0.277 \| good
2025-06-05T23:00:00.000Z	97 \| moderate	19.045 \| fine	71.219 \| fine	69.141 \| fine	0.688 \| good	3.31 \| good	0.277 \| good
2025-06-06T00:00:00.000Z	108 \| sensitive	18.875 \| fine	70.729 \| fine	73.077 \| moderate	0.739 \| good	3.216 \| good	0.301 \| good
2025-06-06T01:00:00.000Z	105 \| sensitive	17.976 \| fine	66.379 \| fine	72.141 \| moderate	0.695 \| good	3.913 \| good	0.301 \| good
2025-06-06T02:00:00.000Z	90 \| moderate	19.52 \| fine	72.996 \| fine	67.229 \| fine	0.733 \| good	4.413 \| good	0.301 \| good
2025-06-06T03:00:00.000Z	71 \| moderate	20.103 \| fine	75.271 \| fine	58.383 \| fine	0.727 \| good	9.731 \| good	0.317 \| good
2025-06-06T04:00:00.000Z	75 \| moderate	22.445 \| fine	83.802 \| fine	60.24 \| fine	0.735 \| good	6.124 \| good	0.303 \| good
2025-06-06T05:00:00.000Z	79 \| moderate	23.629 \| fine	87.292 \| fine	52.343 \| good	0.695 \| good	6.189 \| good	0.271 \| good
2025-06-06T06:00:00.000Z	73 \| moderate	21.494 \| fine	77.223 \| fine	42.302 \| good	0.695 \| good	6.992 \| good	0.208 \| good
2025-06-06T07:00:00.000Z	71 \| moderate	20.018 \| fine	71.684 \| fine	37.338 \| good	0.757 \| good	3.236 \| good	0.219 \| good
2025-06-06T08:00:00.000Z	69 \| moderate	19.005 \| fine	69.368 \| fine	33.35 \| good	0.791 \| good	5.823 \| good	0.219 \| good
2025-06-06T09:00:00.000Z	67 \| moderate	17.977 \| fine	65.686 \| fine	29.338 \| good	0.877 \| good	3.4 \| good	0.235 \| good
2025-06-06T10:00:00.000Z	66 \| moderate	16.556 \| fine	60.349 \| fine	29.145 \| good	0.877 \| good	5.886 \| good	0.217 \| good
2025-06-06T11:00:00.000Z	60 \| moderate	13.665 \| fine	51.04 \| good	32.083 \| good	0.827 \| good	4.201 \| good	0.196 \| good
2025-06-06T12:00:00.000Z	56 \| moderate	11.925 \| good	43.867 \| good	28.128 \| good	0.848 \| good	6.884 \| good	0.212 \| good
2025-06-06T13:00:00.000Z	56 \| moderate	11.943 \| good	44.18 \| good	28.128 \| good	0.844 \| good	6.925 \| good	0.214 \| good
2025-06-06T14:00:00.000Z	54 \| moderate	11.297 \| good	41.887 \| good	27.036 \| good	0.783 \| good	6.724 \| good	0.196 \| good
2025-06-06T15:00:00.000Z	54 \| moderate	11.196 \| good	41.323 \| good	28.911 \| good	0.788 \| good	4.605 \| good	0.196 \| good
2025-06-06T16:00:00.000Z	56 \| moderate	12.193 \| fine	45.38 \| good	29.024 \| good	0.75 \| good	4.231 \| good	0.196 \| good
2025-06-06T17:00:00.000Z	58 \| moderate	13.005 \| fine	49.863 \| good	32.934 \| good	0.711 \| good	4.3 \| good	0.174 \| good
2025-06-06T18:00:00.000Z	60 \| moderate	14.177 \| fine	54.187 \| good	30.967 \| good	0.699 \| good	3.108 \| good	0.196 \| good
2025-06-06T19:00:00.000Z	62 \| moderate	14.885 \| fine	55.748 \| fine	32.913 \| good	0.585 \| good	2.253 \| good	0.246 \| good
2025-06-06T20:00:00.000Z	62 \| moderate	15.062 \| fine	55.471 \| fine	34.858 \| good	0.794 \| good	2.129 \| good	0.209 \| good
2025-06-06T21:00:00.000Z	60 \| moderate	14.201 \| fine	52.628 \| good	34.86 \| good	0.886 \| good	2.539 \| good	0.253 \| good
2025-06-06T22:00:00.000Z	62 \| moderate	15.07 \| fine	55.923 \| fine	28.076 \| good	0.799 \| good	4.03 \| good	0.23 \| good
2025-06-06T23:00:00.000Z	66 \| moderate	17.243 \| fine	61.948 \| fine	27 \| good	0.817 \| good	4.03 \| good	0.209 \| good
2025-06-07T00:00:00.000Z	67 \| moderate	18.096 \| fine	63.923 \| fine	19.001 \| good	0.761 \| good	6.619 \| good	0.23 \| good
2025-06-07T01:00:00.000Z	62 \| moderate	15.341 \| fine	54.843 \| good	20.916 \| good	0.717 \| good	5.226 \| good	0.252 \| good
2025-06-07T02:00:00.000Z	56 \| moderate	12.383 \| fine	43.577 \| good	24.896 \| good	0.697 \| good	5.533 \| good	0.274 \| good
2025-06-07T03:00:00.000Z	56 \| moderate	12.313 \| fine	44.604 \| good	26.841 \| good	0.736 \| good	3.612 \| good	0.252 \| good
2025-06-07T04:00:00.000Z	52 \| moderate	10.44 \| good	36.889 \| good	23.913 \| good	0.771 \| good	3.118 \| good	0.236 \| good
2025-06-07T05:00:00.000Z	54 \| moderate	10.735 \| good	38.854 \| good	26.812 \| good	0.787 \| good	2.22 \| good	0.169 \| good
2025-06-07T06:00:00.000Z	49 \| good	9.422 \| good	32.258 \| good	23.805 \| good	0.736 \| good	3.414 \| good	0.169 \| good
2025-06-07T07:00:00.000Z	54 \| moderate	10.602 \| good	37.364 \| good	20.903 \| good	0.669 \| good	4.503 \| good	0.217 \| good
2025-06-07T08:00:00.000Z	54 \| moderate	10.902 \| good	38.275 \| good	16.983 \| good	0.759 \| good	4.009 \| good	0.217 \| good
2025-06-07T09:00:00.000Z	60 \| moderate	13.612 \| fine	50.872 \| good	16 \| good	0.808 \| good	6.385 \| good	0.217 \| good
2025-06-07T10:00:00.000Z	56 \| moderate	12.066 \| good	42.358 \| good	19.926 \| good	0.777 \| good	6.403 \| good	0.174 \| good
2025-06-07T11:00:00.000Z	56 \| moderate	12.066 \| good	42.358 \| good	19.926 \| good	0.777 \| good	6.403 \| good	0.174 \| good
2025-06-07T12:00:00.000Z	38 \| good	7.095 \| good	31.098 \| good	26.751 \| good	0.125 \| good	3.732 \| good	0.24 \| good
2025-06-07T13:00:00.000Z	29 \| good	4.809 \| good	21.089 \| good	31.401 \| good	0.127 \| good	2.87 \| good	0.217 \| good
2025-06-07T14:00:00.000Z	29 \| good	4.925 \| good	21.312 \| good	30.822 \| good	0.142 \| good	3.236 \| good	0.214 \| good
2025-06-07T15:00:00.000Z	38 \| good	7.16 \| good	31.415 \| good	31.962 \| good	0.158 \| good	3.602 \| good	0.211 \| good
2025-06-07T16:00:00.000Z	44 \| good	7.628 \| good	33.49 \| good	31.355 \| good	0.107 \| good	2.285 \| good	0.185 \| good
2025-06-07T17:00:00.000Z	54 \| moderate	10.749 \| good	47.301 \| good	29.626 \| good	0.118 \| good	2.577 \| good	0.179 \| good
2025-06-07T18:00:00.000Z	52 \| moderate	9.833 \| good	43.99 \| good	33.075 \| good	0.129 \| good	2.868 \| good	0.174 \| good
2025-06-07T19:00:00.000Z	54 \| moderate	11.194 \| good	49.812 \| good	34.129 \| good	0.107 \| good	2.627 \| good	0.176 \| good
2025-06-07T20:00:00.000Z	58 \| moderate	12.927 \| fine	58.581 \| fine	38.937 \| good	0.115 \| good	2.852 \| good	0.167 \| good
2025-06-07T21:00:00.000Z	54 \| moderate	10.895 \| good	47.98 \| good	44.257 \| good	0.122 \| good	3.078 \| good	0.157 \| good
2025-06-07T22:00:00.000Z	52 \| moderate	10.494 \| good	46.667 \| good	45.194 \| good	0.18 \| good	3.753 \| good	0.189 \| good
2025-06-07T23:00:00.000Z	52 \| moderate	9.74 \| good	43.001 \| good	34.321 \| good	0.198 \| good	4.217 \| good	0.181 \| good
2025-06-08T00:00:00.000Z	49 \| good	8.877 \| good	38.789 \| good	28.269 \| good	0.216 \| good	4.68 \| good	0.174 \| good
2025-06-08T01:00:00.000Z	49 \| good	8.602 \| good	37.772 \| good	26.024 \| good	0.302 \| good	3.812 \| good	0.215 \| good
2025-06-08T02:00:00.000Z	49 \| good	9.302 \| good	41.75 \| good	22.036 \| good	0.338 \| good	4.213 \| good	0.208 \| good
2025-06-08T03:00:00.000Z	49 \| good	9.294 \| good	41.808 \| good	18.473 \| good	0.374 \| good	4.613 \| good	0.202 \| good
2025-06-08T04:00:00.000Z	58 \| moderate	12.836 \| fine	57.176 \| fine	15.367 \| good	0.311 \| good	3.756 \| good	0.24 \| good
2025-06-08T05:00:00.000Z	60 \| moderate	13.832 \| fine	62.64 \| fine	12.582 \| good	0.377 \| good	4.061 \| good	0.235 \| good
2025-06-08T06:00:00.000Z	62 \| moderate	15.07 \| fine	67.171 \| fine	15.295 \| good	0.443 \| good	4.366 \| good	0.229 \| good
2025-06-08T07:00:00.000Z	58 \| moderate	13.39 \| fine	60.853 \| fine	14.866 \| good	0.221 \| good	1.763 \| good	0.254 \| good
2025-06-08T08:00:00.000Z	54 \| moderate	11.335 \| good	50.068 \| good	14.31 \| good	0.301 \| good	2.014 \| good	0.252 \| good
2025-06-08T09:00:00.000Z	62 \| moderate	15.297 \| fine	68.836 \| fine	15.479 \| good	0.381 \| good	2.265 \| good	0.251 \| good
2025-06-08T10:00:00.000Z	56 \| moderate	12.346 \| fine	55.403 \| fine	16.742 \| good	0.207 \| good	1.156 \| good	0.273 \| good
2025-06-08T11:00:00.000Z	58 \| moderate	13.288 \| fine	59.386 \| fine	21.746 \| good	0.255 \| good	1.333 \| good	0.271 \| good
2025-06-08T12:00:00.000Z	58 \| moderate	13.132 \| fine	59.014 \| fine	23.164 \| good	0.304 \| good	1.509 \| good	0.27 \| good
2025-06-08T13:00:00.000Z	58 \| moderate	13.428 \| fine	60.757 \| fine	26.767 \| good	0.159 \| good	0.758 \| good	0.259 \| good
2025-06-08T14:00:00.000Z	60 \| moderate	14.362 \| fine	64.985 \| fine	30.709 \| good	0.181 \| good	0.865 \| good	0.26 \| good
2025-06-08T15:00:00.000Z	60 \| moderate	13.656 \| fine	61.264 \| fine	32.848 \| good	0.202 \| good	0.971 \| good	0.262 \| good
2025-06-08T16:00:00.000Z	56 \| moderate	11.836 \| good	52.606 \| good	33.329 \| good	0.137 \| good	0.566 \| good	0.251 \| good
2025-06-08T17:00:00.000Z	56 \| moderate	12.459 \| fine	56.778 \| fine	31.62 \| good	0.154 \| good	0.644 \| good	0.256 \| good
2025-06-08T18:00:00.000Z	54 \| moderate	10.515 \| good	46.883 \| good	33.275 \| good	0.171 \| good	0.723 \| good	0.26 \| good
2025-06-08T19:00:00.000Z	52 \| moderate	10.292 \| good	45.267 \| good	33.386 \| good	0.146 \| good	1.021 \| good	0.253 \| good
2025-06-08T20:00:00.000Z	58 \| moderate	12.776 \| fine	57.394 \| fine	36.473 \| good	0.158 \| good	1.168 \| good	0.258 \| good
2025-06-08T21:00:00.000Z	54 \| moderate	11.306 \| good	50.234 \| good	38.273 \| good	0.17 \| good	1.314 \| good	0.264 \| good
2025-06-08T22:00:00.000Z	56 \| moderate	12.306 \| fine	55.272 \| fine	37.998 \| good	0.173 \| good	3.392 \| good	0.281 \| good
2025-06-08T23:00:00.000Z	60 \| moderate	13.803 \| fine	62.613 \| fine	34.697 \| good	0.179 \| good	3.793 \| good	0.285 \| good
2025-06-09T00:00:00.000Z	64 \| moderate	15.822 \| fine	70.694 \| fine	24.912 \| good	0.185 \| good	4.194 \| good	0.289 \| good
2025-06-09T01:00:00.000Z	66 \| moderate	16.7 \| fine	74.661 \| fine	24.089 \| good	0.291 \| good	6.041 \| good	0.314 \| good
2025-06-09T02:00:00.000Z	64 \| moderate	15.859 \| fine	70.731 \| fine	27.793 \| good	0.313 \| good	6.454 \| good	0.315 \| good
2025-06-09T03:00:00.000Z	60 \| moderate	14.42 \| fine	64.731 \| fine	25.128 \| good	0.335 \| good	6.867 \| good	0.315 \| good
2025-06-09T04:00:00.000Z	66 \| moderate	16.838 \| fine	74.617 \| fine	24.702 \| good	0.267 \| good	4.236 \| good	0.302 \| good
2025-06-09T05:00:00.000Z	60 \| moderate	14.268 \| fine	63.206 \| fine	24.836 \| good	0.299 \| good	4.51 \| good	0.301 \| good
2025-06-09T06:00:00.000Z	73 \| moderate	20.598 \| fine	21.713 \| good	30.097 \| good	0.328 \| good	4.73 \| good	0.299 \| good
2025-06-09T07:00:00.000Z	60 \| moderate	14.019 \| fine	62.769 \| fine	22.817 \| good	0.304 \| good	2.355 \| good	0.277 \| good
2025-06-09T08:00:00.000Z	56 \| moderate	12.121 \| fine	54.725 \| good	22.736 \| good	0.316 \| good	2.387 \| good	0.274 \| good
2025-06-09T09:00:00.000Z	54 \| moderate	11.372 \| good	50.078 \| good	15.434 \| good	0.327 \| good	2.418 \| good	0.271 \| good
2025-06-09T10:00:00.000Z	54 \| moderate	11.184 \| good	49.833 \| good	17.678 \| good	0.289 \| good	1.247 \| good	0.249 \| good
2025-06-09T11:00:00.000Z	56 \| moderate	12.175 \| fine	54.603 \| good	22.546 \| good	0.271 \| good	1.275 \| good	0.247 \| good

Real-time 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

How accurate is Maine, USA air quality data?

Air quality levels in US

Frequently asked questions

How often is air quality information updated for Portland, Maine?

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

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

What is the AQI in Portland, Maine right now?

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

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

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?