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

The PM10 concentration in Portland, Maine is 14.895 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 0.552 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 26.603 ppm.

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

Nitrogen dioxide (NO2) level in Portland, Maine at the moment is 4.859 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)

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)

4.32 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

14.89 μg/m³

155

255

425

605+

Ozone (O₃)

26.60 ppb

201

201+

Sulfur Dioxide (SO₂)

0.55 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.86 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.18 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

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
2025-09-13T23:00:00.000Z	28 \| good	4.195 \| good	10.22 \| good	30.066 \| good	0.458 \| good	2.851 \| good	0.182 \| good
2025-09-14T00:00:00.000Z	28 \| good	4.101 \| good	10.51 \| good	30.338 \| good	0.444 \| good	3.211 \| good	0.218 \| good
2025-09-14T01:00:00.000Z	28 \| good	4.206 \| good	10.383 \| good	29.828 \| good	0.474 \| good	3.356 \| good	0.203 \| good
2025-09-14T02:00:00.000Z	27 \| good	4.576 \| good	10.426 \| good	27.509 \| good	0.457 \| good	3.359 \| good	0.203 \| good
2025-09-14T03:00:00.000Z	33 \| good	6.482 \| good	28.935 \| good	18.522 \| good	0.377 \| good	2.533 \| good	0.15 \| good
2025-09-14T04:00:00.000Z	27 \| good	4.875 \| good	11.057 \| good	20.838 \| good	0.474 \| good	3.806 \| good	0.245 \| good
2025-09-14T05:00:00.000Z	27 \| good	5.061 \| good	11.206 \| good	18.819 \| good	0.418 \| good	6.153 \| good	0.203 \| good
2025-09-14T06:00:00.000Z	27 \| good	5.261 \| good	11.07 \| good	14.209 \| good	0.422 \| good	3.864 \| good	0.203 \| good
2025-09-14T07:00:00.000Z	27 \| good	5.357 \| good	11.443 \| good	13.422 \| good	0.426 \| good	4.583 \| good	0.224 \| good
2025-09-14T08:00:00.000Z	33 \| good	5.633 \| good	11.399 \| good	13.069 \| good	0.462 \| good	5.445 \| good	0.224 \| good
2025-09-14T09:00:00.000Z	33 \| good	5.998 \| good	12.532 \| good	17.64 \| good	0.426 \| good	3.073 \| good	0.203 \| good
2025-09-14T10:00:00.000Z	33 \| good	6.008 \| good	11.171 \| good	11.951 \| good	0.426 \| good	4.672 \| good	0.179 \| good
2025-09-14T11:00:00.000Z	33 \| good	5.845 \| good	11.01 \| good	13.701 \| good	0.447 \| good	4.131 \| good	0.18 \| good
2025-09-14T12:00:00.000Z	33 \| good	5.653 \| good	11.848 \| good	14.395 \| good	0.483 \| good	6.774 \| good	0.2 \| good
2025-09-14T13:00:00.000Z	33 \| good	5.581 \| good	11.29 \| good	12.981 \| good	0.738 \| good	6.111 \| good	0.282 \| good
2025-09-14T14:00:00.000Z	27 \| good	5.173 \| good	10.524 \| good	15.729 \| good	0.582 \| good	4.888 \| good	0.24 \| good
2025-09-14T15:00:00.000Z	27 \| good	5.122 \| good	10.684 \| good	20.237 \| good	0.532 \| good	2.987 \| good	0.242 \| good
2025-09-14T16:00:00.000Z	27 \| good	5.19 \| good	10.941 \| good	22.902 \| good	0.582 \| good	3.14 \| good	0.203 \| good
2025-09-14T17:00:00.000Z	27 \| good	5.363 \| good	12.192 \| good	24.161 \| good	0.582 \| good	2.522 \| good	0.182 \| good
2025-09-14T18:00:00.000Z	33 \| good	5.57 \| good	12.708 \| good	26.651 \| good	0.509 \| good	2.413 \| good	0.203 \| good
2025-09-14T19:00:00.000Z	33 \| good	5.715 \| good	12.74 \| good	31.741 \| good	0.526 \| good	2.907 \| good	0.221 \| good
2025-09-14T20:00:00.000Z	33 \| good	6.013 \| good	12.276 \| good	32.568 \| good	0.526 \| good	3.266 \| good	0.237 \| good
2025-09-14T21:00:00.000Z	33 \| good	6.335 \| good	14.594 \| good	32.726 \| good	0.507 \| good	2.898 \| good	0.219 \| good
2025-09-14T22:00:00.000Z	38 \| good	6.653 \| good	15.311 \| good	35.352 \| good	0.492 \| good	1.22 \| good	0.237 \| good
2025-09-14T23:00:00.000Z	38 \| good	6.647 \| good	15.436 \| good	33.582 \| good	0.554 \| good	3.242 \| good	0.198 \| good
2025-09-15T00:00:00.000Z	38 \| good	7.032 \| good	16.532 \| good	30.819 \| good	0.526 \| good	4.486 \| good	0.271 \| good
2025-09-15T01:00:00.000Z	38 \| good	7.204 \| good	16.396 \| good	28.791 \| good	0.503 \| good	2.44 \| good	0.308 \| good
2025-09-15T02:00:00.000Z	38 \| good	7.352 \| good	17.96 \| good	23.348 \| good	0.516 \| good	2.904 \| good	0.388 \| good
2025-09-15T03:00:00.000Z	44 \| good	8.036 \| good	17.894 \| good	19.126 \| good	0.505 \| good	3.921 \| good	0.478 \| good
2025-09-15T04:00:00.000Z	49 \| good	8.803 \| good	17.132 \| good	16.503 \| good	0.499 \| good	4.058 \| good	0.489 \| good
2025-09-15T05:00:00.000Z	52 \| moderate	10.4 \| good	18.361 \| good	13.725 \| good	0.476 \| good	3.511 \| good	0.483 \| good
2025-09-15T06:00:00.000Z	49 \| good	9.171 \| good	16.908 \| good	9.565 \| good	0.507 \| good	2.743 \| good	0.404 \| good
2025-09-15T07:00:00.000Z	49 \| good	8.505 \| good	14.427 \| good	10.126 \| good	0.505 \| good	2.144 \| good	0.383 \| good
2025-09-15T08:00:00.000Z	44 \| good	8.02 \| good	15.061 \| good	13.503 \| good	0.584 \| good	1.535 \| good	0.367 \| good
2025-09-15T09:00:00.000Z	38 \| good	7.031 \| good	11.639 \| good	11.08 \| good	0.583 \| good	2.047 \| good	0.303 \| good
2025-09-15T10:00:00.000Z	33 \| good	6.361 \| good	11.186 \| good	11.997 \| good	0.503 \| good	1.563 \| good	0.303 \| good
2025-09-15T11:00:00.000Z	33 \| good	6.224 \| good	10.856 \| good	9.105 \| good	0.517 \| good	2.257 \| good	0.298 \| good
2025-09-15T12:00:00.000Z	33 \| good	6.164 \| good	12.075 \| good	14.745 \| good	0.552 \| good	3.971 \| good	0.277 \| good
2025-09-15T13:00:00.000Z	33 \| good	5.771 \| good	14.265 \| good	15.561 \| good	0.551 \| good	6.883 \| good	0.271 \| good
2025-09-15T14:00:00.000Z	33 \| good	5.572 \| good	18.734 \| good	15.838 \| good	0.568 \| good	4.66 \| good	0.244 \| good
2025-09-15T15:00:00.000Z	33 \| good	5.558 \| good	24.737 \| good	17.143 \| good	0.518 \| good	3.591 \| good	0.256 \| good
2025-09-15T16:00:00.000Z	33 \| good	5.594 \| good	28.443 \| good	18.834 \| good	0.48 \| good	5.023 \| good	0.182 \| good
2025-09-15T17:00:00.000Z	27 \| good	5.061 \| good	21.012 \| good	20.709 \| good	0.468 \| good	5.193 \| good	0.18 \| good
2025-09-15T18:00:00.000Z	27 \| good	4.669 \| good	16.609 \| good	21.939 \| good	0.484 \| good	4.467 \| good	0.18 \| good
2025-09-15T19:00:00.000Z	22 \| good	4.48 \| good	16.82 \| good	23.302 \| good	0.515 \| good	4.045 \| good	0.181 \| good
2025-09-15T20:00:00.000Z	22 \| good	4.453 \| good	16.271 \| good	24.049 \| good	0.501 \| good	3.827 \| good	0.181 \| good
2025-09-15T21:00:00.000Z	25 \| good	4.316 \| good	14.895 \| good	26.603 \| good	0.552 \| good	4.859 \| good	0.176 \| good
2025-09-15T22:00:00.000Z	25 \| good	4.316 \| good	14.895 \| good	26.603 \| good	0.552 \| good	4.859 \| good	0.176 \| good
2025-09-15T23:00:00.000Z	22 \| good	4.167 \| good	18.749 \| good	20.433 \| good	0.236 \| good	2.875 \| good	0.178 \| good
2025-09-16T00:00:00.000Z	27 \| good	5.366 \| good	22.971 \| good	15.617 \| good	0.233 \| good	3.687 \| good	0.183 \| good
2025-09-16T01:00:00.000Z	49 \| good	9.481 \| good	42.582 \| good	15.016 \| good	0.259 \| good	4.047 \| good	0.187 \| good
2025-09-16T02:00:00.000Z	49 \| good	8.979 \| good	40.515 \| good	12.901 \| good	0.285 \| good	4.408 \| good	0.191 \| good
2025-09-16T03:00:00.000Z	52 \| moderate	10.282 \| good	45.699 \| good	9.06 \| good	0.312 \| good	4.768 \| good	0.194 \| good
2025-09-16T04:00:00.000Z	49 \| good	8.826 \| good	38.772 \| good	6.702 \| good	0.327 \| good	4.673 \| good	0.196 \| good
2025-09-16T05:00:00.000Z	33 \| good	6.447 \| good	28.884 \| good	6.894 \| good	0.341 \| good	4.578 \| good	0.197 \| good
2025-09-16T06:00:00.000Z	33 \| good	6.178 \| good	27.078 \| good	6.442 \| good	0.356 \| good	4.483 \| good	0.199 \| good
2025-09-16T07:00:00.000Z	44 \| good	7.503 \| good	32.949 \| good	5.08 \| good	0.366 \| good	4.322 \| good	0.199 \| good
2025-09-16T08:00:00.000Z	44 \| good	7.792 \| good	33.967 \| good	5.85 \| good	0.376 \| good	4.162 \| good	0.2 \| good
2025-09-16T09:00:00.000Z	33 \| good	6.323 \| good	28.021 \| good	4.001 \| good	0.386 \| good	4.001 \| good	0.2 \| good
2025-09-16T10:00:00.000Z	27 \| good	4.938 \| good	21 \| good	2.13 \| good	0.403 \| good	4.259 \| good	0.21 \| good
2025-09-16T11:00:00.000Z	22 \| good	4.49 \| good	19.16 \| good	3.374 \| good	0.421 \| good	4.517 \| good	0.22 \| good
2025-09-16T12:00:00.000Z	27 \| good	5.153 \| good	22.103 \| good	11.619 \| good	0.438 \| good	4.775 \| good	0.23 \| good
2025-09-16T13:00:00.000Z	27 \| good	5.012 \| good	21.333 \| good	18.313 \| good	0.508 \| good	3.779 \| good	0.217 \| good
2025-09-16T14:00:00.000Z	27 \| good	5.155 \| good	22.319 \| good	25.526 \| good	0.577 \| good	2.784 \| good	0.204 \| good
2025-09-16T15:00:00.000Z	27 \| good	4.912 \| good	21.388 \| good	26.863 \| good	0.647 \| good	1.789 \| good	0.191 \| good
2025-09-16T16:00:00.000Z	33 \| good	5.675 \| good	24.458 \| good	26.096 \| good	0.566 \| good	1.471 \| good	0.186 \| good
2025-09-16T17:00:00.000Z	38 \| good	6.549 \| good	29.147 \| good	28.072 \| good	0.485 \| good	1.153 \| good	0.181 \| good
2025-09-16T18:00:00.000Z	33 \| good	5.538 \| good	23.815 \| good	28.757 \| good	0.403 \| good	0.835 \| good	0.175 \| good
2025-09-16T19:00:00.000Z	26 \| good	3.586 \| good	15.806 \| good	27.981 \| good	0.384 \| good	1.013 \| good	0.174 \| good
2025-09-16T20:00:00.000Z	24 \| good	3.037 \| good	12.31 \| good	25.519 \| good	0.366 \| good	1.191 \| good	0.174 \| good
2025-09-16T21:00:00.000Z	22 \| good	3.1 \| good	12.368 \| good	24.268 \| good	0.347 \| good	1.369 \| good	0.173 \| good
2025-09-16T22:00:00.000Z	27 \| good	5.112 \| good	21.974 \| good	25.252 \| good	0.339 \| good	2.452 \| good	0.181 \| good
2025-09-16T23:00:00.000Z	27 \| good	4.54 \| good	19.791 \| good	21.272 \| good	0.332 \| good	3.534 \| good	0.189 \| good
2025-09-17T00:00:00.000Z	22 \| good	3.564 \| good	15.778 \| good	22.001 \| good	0.324 \| good	4.616 \| good	0.197 \| good
2025-09-17T01:00:00.000Z	27 \| good	5.17 \| good	22.63 \| good	18.848 \| good	0.333 \| good	4.724 \| good	0.197 \| good
2025-09-17T02:00:00.000Z	27 \| good	5.296 \| good	22.855 \| good	14.344 \| good	0.343 \| good	4.833 \| good	0.198 \| good
2025-09-17T03:00:00.000Z	27 \| good	4.995 \| good	21.713 \| good	14.487 \| good	0.352 \| good	4.941 \| good	0.198 \| good
2025-09-17T04:00:00.000Z	22 \| good	4.266 \| good	18.902 \| good	9.729 \| good	0.35 \| good	4.958 \| good	0.199 \| good
2025-09-17T05:00:00.000Z	16 \| good	3.281 \| good	14.058 \| good	8.699 \| good	0.349 \| good	4.974 \| good	0.2 \| good
2025-09-17T06:00:00.000Z	22 \| good	4 \| good	17.711 \| good	7.454 \| good	0.347 \| good	4.991 \| good	0.201 \| good
2025-09-17T07:00:00.000Z	27 \| good	5.142 \| good	22.007 \| good	4.271 \| good	0.341 \| good	5.041 \| good	0.203 \| good
2025-09-17T08:00:00.000Z	27 \| good	5.127 \| good	22.021 \| good	6.104 \| good	0.335 \| good	5.091 \| good	0.205 \| good
2025-09-17T09:00:00.000Z	16 \| good	3.045 \| good	12.05 \| good	4.455 \| good	0.329 \| good	5.141 \| good	0.207 \| good
2025-09-17T10:00:00.000Z	22 \| good	3.915 \| good	16.983 \| good	3.77 \| good	0.269 \| good	5.809 \| good	0.226 \| good
2025-09-17T11:00:00.000Z	22 \| good	3.518 \| good	15.859 \| good	3.321 \| good	0.208 \| good	6.477 \| good	0.245 \| good
2025-09-17T12:00:00.000Z	22 \| good	3.549 \| good	15.942 \| good	10.243 \| good	0.148 \| good	7.144 \| good	0.263 \| good
2025-09-17T13:00:00.000Z	22 \| good	3.541 \| good	15.941 \| good	17.773 \| good	0.225 \| good	5.212 \| good	0.23 \| good
2025-09-17T14:00:00.000Z	20 \| good	3.453 \| good	15.174 \| good	22.094 \| good	0.303 \| good	3.279 \| good	0.196 \| good
2025-09-17T15:00:00.000Z	22 \| good	4.09 \| good	18.118 \| good	24.198 \| good	0.381 \| good	1.347 \| good	0.163 \| good
2025-09-17T16:00:00.000Z	24 \| good	3.392 \| good	15.043 \| good	25.883 \| good	0.361 \| good	1.092 \| good	0.157 \| good
2025-09-17T17:00:00.000Z	30 \| good	3.164 \| good	14.044 \| good	31.664 \| good	0.341 \| good	0.838 \| good	0.152 \| good
2025-09-17T18:00:00.000Z	33 \| good	2.571 \| good	10.136 \| good	35.508 \| good	0.32 \| good	0.584 \| good	0.147 \| good
2025-09-17T19:00:00.000Z	31 \| good	2.649 \| good	10.88 \| good	33.783 \| good	0.299 \| good	0.707 \| good	0.147 \| good
2025-09-17T20:00:00.000Z	29 \| good	2.159 \| good	8.918 \| good	30.878 \| good	0.278 \| good	0.829 \| good	0.147 \| good
2025-09-17T21:00:00.000Z	25 \| good	2.071 \| good	8.129 \| good	26.529 \| good	0.258 \| good	0.952 \| good	0.147 \| good
2025-09-17T22:00:00.000Z	23 \| good	2.965 \| good	12.03 \| good	24.993 \| good	0.257 \| good	1.614 \| good	0.152 \| 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

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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 05:00:00 on 2025-09-15.

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 2025-09-15.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 25, indicating Good conditions.

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

Portland, Maine air has the highest levels of O3.

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 4.316 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 14.895 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 0.176 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.552 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 26.603 ppm.

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

Nitrogen dioxide (NO₂) level in Portland, Maine at the moment is 4.859 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-13T23:00:00.000Z	28 \| good	4.195 \| good	10.22 \| good	30.066 \| good	0.458 \| good	2.851 \| good	0.182 \| good
2025-09-14T00:00:00.000Z	28 \| good	4.101 \| good	10.51 \| good	30.338 \| good	0.444 \| good	3.211 \| good	0.218 \| good
2025-09-14T01:00:00.000Z	28 \| good	4.206 \| good	10.383 \| good	29.828 \| good	0.474 \| good	3.356 \| good	0.203 \| good
2025-09-14T02:00:00.000Z	27 \| good	4.576 \| good	10.426 \| good	27.509 \| good	0.457 \| good	3.359 \| good	0.203 \| good
2025-09-14T03:00:00.000Z	33 \| good	6.482 \| good	28.935 \| good	18.522 \| good	0.377 \| good	2.533 \| good	0.15 \| good
2025-09-14T04:00:00.000Z	27 \| good	4.875 \| good	11.057 \| good	20.838 \| good	0.474 \| good	3.806 \| good	0.245 \| good
2025-09-14T05:00:00.000Z	27 \| good	5.061 \| good	11.206 \| good	18.819 \| good	0.418 \| good	6.153 \| good	0.203 \| good
2025-09-14T06:00:00.000Z	27 \| good	5.261 \| good	11.07 \| good	14.209 \| good	0.422 \| good	3.864 \| good	0.203 \| good
2025-09-14T07:00:00.000Z	27 \| good	5.357 \| good	11.443 \| good	13.422 \| good	0.426 \| good	4.583 \| good	0.224 \| good
2025-09-14T08:00:00.000Z	33 \| good	5.633 \| good	11.399 \| good	13.069 \| good	0.462 \| good	5.445 \| good	0.224 \| good
2025-09-14T09:00:00.000Z	33 \| good	5.998 \| good	12.532 \| good	17.64 \| good	0.426 \| good	3.073 \| good	0.203 \| good
2025-09-14T10:00:00.000Z	33 \| good	6.008 \| good	11.171 \| good	11.951 \| good	0.426 \| good	4.672 \| good	0.179 \| good
2025-09-14T11:00:00.000Z	33 \| good	5.845 \| good	11.01 \| good	13.701 \| good	0.447 \| good	4.131 \| good	0.18 \| good
2025-09-14T12:00:00.000Z	33 \| good	5.653 \| good	11.848 \| good	14.395 \| good	0.483 \| good	6.774 \| good	0.2 \| good
2025-09-14T13:00:00.000Z	33 \| good	5.581 \| good	11.29 \| good	12.981 \| good	0.738 \| good	6.111 \| good	0.282 \| good
2025-09-14T14:00:00.000Z	27 \| good	5.173 \| good	10.524 \| good	15.729 \| good	0.582 \| good	4.888 \| good	0.24 \| good
2025-09-14T15:00:00.000Z	27 \| good	5.122 \| good	10.684 \| good	20.237 \| good	0.532 \| good	2.987 \| good	0.242 \| good
2025-09-14T16:00:00.000Z	27 \| good	5.19 \| good	10.941 \| good	22.902 \| good	0.582 \| good	3.14 \| good	0.203 \| good
2025-09-14T17:00:00.000Z	27 \| good	5.363 \| good	12.192 \| good	24.161 \| good	0.582 \| good	2.522 \| good	0.182 \| good
2025-09-14T18:00:00.000Z	33 \| good	5.57 \| good	12.708 \| good	26.651 \| good	0.509 \| good	2.413 \| good	0.203 \| good
2025-09-14T19:00:00.000Z	33 \| good	5.715 \| good	12.74 \| good	31.741 \| good	0.526 \| good	2.907 \| good	0.221 \| good
2025-09-14T20:00:00.000Z	33 \| good	6.013 \| good	12.276 \| good	32.568 \| good	0.526 \| good	3.266 \| good	0.237 \| good
2025-09-14T21:00:00.000Z	33 \| good	6.335 \| good	14.594 \| good	32.726 \| good	0.507 \| good	2.898 \| good	0.219 \| good
2025-09-14T22:00:00.000Z	38 \| good	6.653 \| good	15.311 \| good	35.352 \| good	0.492 \| good	1.22 \| good	0.237 \| good
2025-09-14T23:00:00.000Z	38 \| good	6.647 \| good	15.436 \| good	33.582 \| good	0.554 \| good	3.242 \| good	0.198 \| good
2025-09-15T00:00:00.000Z	38 \| good	7.032 \| good	16.532 \| good	30.819 \| good	0.526 \| good	4.486 \| good	0.271 \| good
2025-09-15T01:00:00.000Z	38 \| good	7.204 \| good	16.396 \| good	28.791 \| good	0.503 \| good	2.44 \| good	0.308 \| good
2025-09-15T02:00:00.000Z	38 \| good	7.352 \| good	17.96 \| good	23.348 \| good	0.516 \| good	2.904 \| good	0.388 \| good
2025-09-15T03:00:00.000Z	44 \| good	8.036 \| good	17.894 \| good	19.126 \| good	0.505 \| good	3.921 \| good	0.478 \| good
2025-09-15T04:00:00.000Z	49 \| good	8.803 \| good	17.132 \| good	16.503 \| good	0.499 \| good	4.058 \| good	0.489 \| good
2025-09-15T05:00:00.000Z	52 \| moderate	10.4 \| good	18.361 \| good	13.725 \| good	0.476 \| good	3.511 \| good	0.483 \| good
2025-09-15T06:00:00.000Z	49 \| good	9.171 \| good	16.908 \| good	9.565 \| good	0.507 \| good	2.743 \| good	0.404 \| good
2025-09-15T07:00:00.000Z	49 \| good	8.505 \| good	14.427 \| good	10.126 \| good	0.505 \| good	2.144 \| good	0.383 \| good
2025-09-15T08:00:00.000Z	44 \| good	8.02 \| good	15.061 \| good	13.503 \| good	0.584 \| good	1.535 \| good	0.367 \| good
2025-09-15T09:00:00.000Z	38 \| good	7.031 \| good	11.639 \| good	11.08 \| good	0.583 \| good	2.047 \| good	0.303 \| good
2025-09-15T10:00:00.000Z	33 \| good	6.361 \| good	11.186 \| good	11.997 \| good	0.503 \| good	1.563 \| good	0.303 \| good
2025-09-15T11:00:00.000Z	33 \| good	6.224 \| good	10.856 \| good	9.105 \| good	0.517 \| good	2.257 \| good	0.298 \| good
2025-09-15T12:00:00.000Z	33 \| good	6.164 \| good	12.075 \| good	14.745 \| good	0.552 \| good	3.971 \| good	0.277 \| good
2025-09-15T13:00:00.000Z	33 \| good	5.771 \| good	14.265 \| good	15.561 \| good	0.551 \| good	6.883 \| good	0.271 \| good
2025-09-15T14:00:00.000Z	33 \| good	5.572 \| good	18.734 \| good	15.838 \| good	0.568 \| good	4.66 \| good	0.244 \| good
2025-09-15T15:00:00.000Z	33 \| good	5.558 \| good	24.737 \| good	17.143 \| good	0.518 \| good	3.591 \| good	0.256 \| good
2025-09-15T16:00:00.000Z	33 \| good	5.594 \| good	28.443 \| good	18.834 \| good	0.48 \| good	5.023 \| good	0.182 \| good
2025-09-15T17:00:00.000Z	27 \| good	5.061 \| good	21.012 \| good	20.709 \| good	0.468 \| good	5.193 \| good	0.18 \| good
2025-09-15T18:00:00.000Z	27 \| good	4.669 \| good	16.609 \| good	21.939 \| good	0.484 \| good	4.467 \| good	0.18 \| good
2025-09-15T19:00:00.000Z	22 \| good	4.48 \| good	16.82 \| good	23.302 \| good	0.515 \| good	4.045 \| good	0.181 \| good
2025-09-15T20:00:00.000Z	22 \| good	4.453 \| good	16.271 \| good	24.049 \| good	0.501 \| good	3.827 \| good	0.181 \| good
2025-09-15T21:00:00.000Z	25 \| good	4.316 \| good	14.895 \| good	26.603 \| good	0.552 \| good	4.859 \| good	0.176 \| good
2025-09-15T22:00:00.000Z	25 \| good	4.316 \| good	14.895 \| good	26.603 \| good	0.552 \| good	4.859 \| good	0.176 \| good
2025-09-15T23:00:00.000Z	22 \| good	4.167 \| good	18.749 \| good	20.433 \| good	0.236 \| good	2.875 \| good	0.178 \| good
2025-09-16T00:00:00.000Z	27 \| good	5.366 \| good	22.971 \| good	15.617 \| good	0.233 \| good	3.687 \| good	0.183 \| good
2025-09-16T01:00:00.000Z	49 \| good	9.481 \| good	42.582 \| good	15.016 \| good	0.259 \| good	4.047 \| good	0.187 \| good
2025-09-16T02:00:00.000Z	49 \| good	8.979 \| good	40.515 \| good	12.901 \| good	0.285 \| good	4.408 \| good	0.191 \| good
2025-09-16T03:00:00.000Z	52 \| moderate	10.282 \| good	45.699 \| good	9.06 \| good	0.312 \| good	4.768 \| good	0.194 \| good
2025-09-16T04:00:00.000Z	49 \| good	8.826 \| good	38.772 \| good	6.702 \| good	0.327 \| good	4.673 \| good	0.196 \| good
2025-09-16T05:00:00.000Z	33 \| good	6.447 \| good	28.884 \| good	6.894 \| good	0.341 \| good	4.578 \| good	0.197 \| good
2025-09-16T06:00:00.000Z	33 \| good	6.178 \| good	27.078 \| good	6.442 \| good	0.356 \| good	4.483 \| good	0.199 \| good
2025-09-16T07:00:00.000Z	44 \| good	7.503 \| good	32.949 \| good	5.08 \| good	0.366 \| good	4.322 \| good	0.199 \| good
2025-09-16T08:00:00.000Z	44 \| good	7.792 \| good	33.967 \| good	5.85 \| good	0.376 \| good	4.162 \| good	0.2 \| good
2025-09-16T09:00:00.000Z	33 \| good	6.323 \| good	28.021 \| good	4.001 \| good	0.386 \| good	4.001 \| good	0.2 \| good
2025-09-16T10:00:00.000Z	27 \| good	4.938 \| good	21 \| good	2.13 \| good	0.403 \| good	4.259 \| good	0.21 \| good
2025-09-16T11:00:00.000Z	22 \| good	4.49 \| good	19.16 \| good	3.374 \| good	0.421 \| good	4.517 \| good	0.22 \| good
2025-09-16T12:00:00.000Z	27 \| good	5.153 \| good	22.103 \| good	11.619 \| good	0.438 \| good	4.775 \| good	0.23 \| good
2025-09-16T13:00:00.000Z	27 \| good	5.012 \| good	21.333 \| good	18.313 \| good	0.508 \| good	3.779 \| good	0.217 \| good
2025-09-16T14:00:00.000Z	27 \| good	5.155 \| good	22.319 \| good	25.526 \| good	0.577 \| good	2.784 \| good	0.204 \| good
2025-09-16T15:00:00.000Z	27 \| good	4.912 \| good	21.388 \| good	26.863 \| good	0.647 \| good	1.789 \| good	0.191 \| good
2025-09-16T16:00:00.000Z	33 \| good	5.675 \| good	24.458 \| good	26.096 \| good	0.566 \| good	1.471 \| good	0.186 \| good
2025-09-16T17:00:00.000Z	38 \| good	6.549 \| good	29.147 \| good	28.072 \| good	0.485 \| good	1.153 \| good	0.181 \| good
2025-09-16T18:00:00.000Z	33 \| good	5.538 \| good	23.815 \| good	28.757 \| good	0.403 \| good	0.835 \| good	0.175 \| good
2025-09-16T19:00:00.000Z	26 \| good	3.586 \| good	15.806 \| good	27.981 \| good	0.384 \| good	1.013 \| good	0.174 \| good
2025-09-16T20:00:00.000Z	24 \| good	3.037 \| good	12.31 \| good	25.519 \| good	0.366 \| good	1.191 \| good	0.174 \| good
2025-09-16T21:00:00.000Z	22 \| good	3.1 \| good	12.368 \| good	24.268 \| good	0.347 \| good	1.369 \| good	0.173 \| good
2025-09-16T22:00:00.000Z	27 \| good	5.112 \| good	21.974 \| good	25.252 \| good	0.339 \| good	2.452 \| good	0.181 \| good
2025-09-16T23:00:00.000Z	27 \| good	4.54 \| good	19.791 \| good	21.272 \| good	0.332 \| good	3.534 \| good	0.189 \| good
2025-09-17T00:00:00.000Z	22 \| good	3.564 \| good	15.778 \| good	22.001 \| good	0.324 \| good	4.616 \| good	0.197 \| good
2025-09-17T01:00:00.000Z	27 \| good	5.17 \| good	22.63 \| good	18.848 \| good	0.333 \| good	4.724 \| good	0.197 \| good
2025-09-17T02:00:00.000Z	27 \| good	5.296 \| good	22.855 \| good	14.344 \| good	0.343 \| good	4.833 \| good	0.198 \| good
2025-09-17T03:00:00.000Z	27 \| good	4.995 \| good	21.713 \| good	14.487 \| good	0.352 \| good	4.941 \| good	0.198 \| good
2025-09-17T04:00:00.000Z	22 \| good	4.266 \| good	18.902 \| good	9.729 \| good	0.35 \| good	4.958 \| good	0.199 \| good
2025-09-17T05:00:00.000Z	16 \| good	3.281 \| good	14.058 \| good	8.699 \| good	0.349 \| good	4.974 \| good	0.2 \| good
2025-09-17T06:00:00.000Z	22 \| good	4 \| good	17.711 \| good	7.454 \| good	0.347 \| good	4.991 \| good	0.201 \| good
2025-09-17T07:00:00.000Z	27 \| good	5.142 \| good	22.007 \| good	4.271 \| good	0.341 \| good	5.041 \| good	0.203 \| good
2025-09-17T08:00:00.000Z	27 \| good	5.127 \| good	22.021 \| good	6.104 \| good	0.335 \| good	5.091 \| good	0.205 \| good
2025-09-17T09:00:00.000Z	16 \| good	3.045 \| good	12.05 \| good	4.455 \| good	0.329 \| good	5.141 \| good	0.207 \| good
2025-09-17T10:00:00.000Z	22 \| good	3.915 \| good	16.983 \| good	3.77 \| good	0.269 \| good	5.809 \| good	0.226 \| good
2025-09-17T11:00:00.000Z	22 \| good	3.518 \| good	15.859 \| good	3.321 \| good	0.208 \| good	6.477 \| good	0.245 \| good
2025-09-17T12:00:00.000Z	22 \| good	3.549 \| good	15.942 \| good	10.243 \| good	0.148 \| good	7.144 \| good	0.263 \| good
2025-09-17T13:00:00.000Z	22 \| good	3.541 \| good	15.941 \| good	17.773 \| good	0.225 \| good	5.212 \| good	0.23 \| good
2025-09-17T14:00:00.000Z	20 \| good	3.453 \| good	15.174 \| good	22.094 \| good	0.303 \| good	3.279 \| good	0.196 \| good
2025-09-17T15:00:00.000Z	22 \| good	4.09 \| good	18.118 \| good	24.198 \| good	0.381 \| good	1.347 \| good	0.163 \| good
2025-09-17T16:00:00.000Z	24 \| good	3.392 \| good	15.043 \| good	25.883 \| good	0.361 \| good	1.092 \| good	0.157 \| good
2025-09-17T17:00:00.000Z	30 \| good	3.164 \| good	14.044 \| good	31.664 \| good	0.341 \| good	0.838 \| good	0.152 \| good
2025-09-17T18:00:00.000Z	33 \| good	2.571 \| good	10.136 \| good	35.508 \| good	0.32 \| good	0.584 \| good	0.147 \| good
2025-09-17T19:00:00.000Z	31 \| good	2.649 \| good	10.88 \| good	33.783 \| good	0.299 \| good	0.707 \| good	0.147 \| good
2025-09-17T20:00:00.000Z	29 \| good	2.159 \| good	8.918 \| good	30.878 \| good	0.278 \| good	0.829 \| good	0.147 \| good
2025-09-17T21:00:00.000Z	25 \| good	2.071 \| good	8.129 \| good	26.529 \| good	0.258 \| good	0.952 \| good	0.147 \| good
2025-09-17T22:00:00.000Z	23 \| good	2.965 \| good	12.03 \| good	24.993 \| good	0.257 \| good	1.614 \| good	0.152 \| 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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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?