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

The PM10 concentration in Portland, Maine is 12.804 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 0.207 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 34.066 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 2.483 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 2.879 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)

2.88 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

12.80 μg/m³

155

255

425

605+

Ozone (O₃)

34.07 ppb

201

201+

Sulfur Dioxide (SO₂)

0.21 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.48 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.17 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
2026-03-12T21:00:00.000Z	38 \| good	6.55 \| good	17.64 \| good	23.072 \| good	0.206 \| good	6.947 \| good	0.165 \| good
2026-03-12T22:00:00.000Z	28 \| good	5.024 \| good	23.424 \| good	29.914 \| good	0.206 \| good	4.082 \| good	0.143 \| good
2026-03-12T23:00:00.000Z	30 \| good	4.614 \| good	29.45 \| good	31.938 \| good	0.109 \| good	4.083 \| good	0.165 \| good
2026-03-13T00:00:00.000Z	33 \| good	3.82 \| good	26.341 \| good	35.811 \| good	0.111 \| good	2.894 \| good	0.165 \| good
2026-03-13T01:00:00.000Z	31 \| good	3.473 \| good	21.559 \| good	32.88 \| good	0.111 \| good	2.093 \| good	0.165 \| good
2026-03-13T02:00:00.000Z	27 \| good	3.461 \| good	19.544 \| good	29.103 \| good	0.114 \| good	2.093 \| good	0.165 \| good
2026-03-13T03:00:00.000Z	32 \| good	3.274 \| good	15.78 \| good	34.901 \| good	0.718 \| good	1.893 \| good	0.165 \| good
2026-03-13T04:00:00.000Z	31 \| good	2.971 \| good	11.892 \| good	33.864 \| good	0.112 \| good	2.087 \| good	0.165 \| good
2026-03-13T05:00:00.000Z	31 \| good	2.798 \| good	9.184 \| good	32.895 \| good	0.682 \| good	1.788 \| good	0.165 \| good
2026-03-13T06:00:00.000Z	30 \| good	2.718 \| good	8.242 \| good	32.034 \| good	0.689 \| good	1.695 \| good	0.145 \| good
2026-03-13T07:00:00.000Z	30 \| good	2.717 \| good	8.238 \| good	32.037 \| good	0.689 \| good	1.695 \| good	0.145 \| good
2026-03-13T08:00:00.000Z	34 \| good	2.767 \| good	8.972 \| good	36.641 \| good	0.535 \| good	2.992 \| good	0.123 \| good
2026-03-13T09:00:00.000Z	30 \| good	2.875 \| good	9.854 \| good	31.966 \| good	0.108 \| good	6.249 \| good	0.145 \| good
2026-03-13T10:00:00.000Z	26 \| good	3.069 \| good	14.71 \| good	28.099 \| good	0.498 \| good	7.959 \| good	0.166 \| good
2026-03-13T11:00:00.000Z	29 \| good	4.128 \| good	27.994 \| good	30.98 \| good	0.553 \| good	11.786 \| good	0.166 \| good
2026-03-13T12:00:00.000Z	29 \| good	4.122 \| good	28.159 \| good	30.964 \| good	0.552 \| good	11.793 \| good	0.166 \| good
2026-03-13T13:00:00.000Z	44 \| good	5.511 \| good	47.569 \| good	25.234 \| good	0.108 \| good	15.661 \| good	0.203 \| good
2026-03-13T14:00:00.000Z	44 \| good	5.434 \| good	48.388 \| good	31.047 \| good	0.108 \| good	3.726 \| good	0.2 \| good
2026-03-13T15:00:00.000Z	37 \| good	4.859 \| good	39.811 \| good	33.981 \| good	0.109 \| good	2.806 \| good	0.184 \| good
2026-03-13T16:00:00.000Z	33 \| good	4.484 \| good	35.973 \| good	35.822 \| good	0.206 \| good	5.41 \| good	0.165 \| good
2026-03-13T17:00:00.000Z	34 \| good	4.174 \| good	25.334 \| good	36.87 \| good	0.108 \| good	4.133 \| good	0.181 \| good
2026-03-13T18:00:00.000Z	37 \| good	3.97 \| good	21.8 \| good	39.842 \| good	0.511 \| good	1.677 \| good	0.165 \| good
2026-03-13T19:00:00.000Z	36 \| good	4.079 \| good	31.618 \| good	38.949 \| good	0.511 \| good	2.75 \| good	0.165 \| good
2026-03-13T20:00:00.000Z	42 \| good	4.553 \| good	45.385 \| good	39.962 \| good	0.438 \| good	2.047 \| good	0.181 \| good
2026-03-13T21:00:00.000Z	51 \| moderate	5.118 \| good	55.999 \| fine	40.89 \| good	0.565 \| good	2.041 \| good	0.2 \| good
2026-03-13T22:00:00.000Z	42 \| good	5.118 \| good	44.825 \| good	38.023 \| good	0.565 \| good	3.502 \| good	0.165 \| good
2026-03-13T23:00:00.000Z	34 \| good	5.129 \| good	32.09 \| good	37.174 \| good	0.587 \| good	2.411 \| good	0.2 \| good
2026-03-14T00:00:00.000Z	37 \| good	5.443 \| good	28.683 \| good	39.95 \| good	0.533 \| good	2.392 \| good	0.2 \| good
2026-03-14T01:00:00.000Z	36 \| good	5.74 \| good	25.591 \| good	39.088 \| good	0.109 \| good	4.346 \| good	0.2 \| good
2026-03-14T02:00:00.000Z	36 \| good	4.869 \| good	21.712 \| good	39.001 \| good	0.11 \| good	5.407 \| good	0.2 \| good
2026-03-14T03:00:00.000Z	40 \| good	5.107 \| good	20.795 \| good	42.824 \| good	0.111 \| good	2.859 \| good	0.184 \| good
2026-03-14T04:00:00.000Z	35 \| good	5.397 \| good	18.778 \| good	38 \| good	0.109 \| good	4.891 \| good	0.181 \| good
2026-03-14T05:00:00.000Z	36 \| good	5.472 \| good	17.907 \| good	38.961 \| good	0.109 \| good	3.044 \| good	0.181 \| good
2026-03-14T06:00:00.000Z	37 \| good	5.182 \| good	15.012 \| good	39.901 \| good	0.109 \| good	1.439 \| good	0.181 \| good
2026-03-14T07:00:00.000Z	37 \| good	5.17 \| good	14.993 \| good	39.906 \| good	0.107 \| good	1.437 \| good	0.181 \| good
2026-03-14T08:00:00.000Z	36 \| good	3.995 \| good	9.287 \| good	38.96 \| good	0.108 \| good	0.859 \| good	0.181 \| good
2026-03-14T09:00:00.000Z	37 \| good	3.276 \| good	7.164 \| good	39.971 \| good	0.106 \| good	2.192 \| good	0.181 \| good
2026-03-14T10:00:00.000Z	37 \| good	3.886 \| good	8.258 \| good	39.78 \| good	0.107 \| good	5.859 \| good	0.181 \| good
2026-03-14T11:00:00.000Z	31 \| good	4.67 \| good	9.323 \| good	34.094 \| good	0.482 \| good	10.705 \| good	0.181 \| good
2026-03-14T12:00:00.000Z	31 \| good	5.162 \| good	11.285 \| good	33.076 \| good	0.107 \| good	10.411 \| good	0.2 \| good
2026-03-14T13:00:00.000Z	31 \| good	5.175 \| good	11.029 \| good	33.082 \| good	0.108 \| good	10.398 \| good	0.2 \| good
2026-03-14T14:00:00.000Z	38 \| good	6.92 \| good	16.882 \| good	32.982 \| good	0.208 \| good	6.293 \| good	0.181 \| good
2026-03-14T15:00:00.000Z	38 \| good	6.522 \| good	16.675 \| good	34.903 \| good	0.208 \| good	4.277 \| good	0.165 \| good
2026-03-14T16:00:00.000Z	34 \| good	5.497 \| good	15.797 \| good	36.808 \| good	0.207 \| good	3.275 \| good	0.181 \| good
2026-03-14T17:00:00.000Z	35 \| good	4.452 \| good	16.772 \| good	37.814 \| good	0.206 \| good	2.586 \| good	0.181 \| good
2026-03-14T18:00:00.000Z	31 \| good	3.468 \| good	15.819 \| good	34.037 \| good	0.207 \| good	2.487 \| good	0.165 \| good
2026-03-14T19:00:00.000Z	31 \| good	2.879 \| good	12.804 \| good	34.066 \| good	0.207 \| good	2.483 \| good	0.165 \| good
2026-03-14T20:00:00.000Z	31 \| good	2.879 \| good	12.804 \| good	34.066 \| good	0.207 \| good	2.483 \| good	0.165 \| good
2026-03-14T21:00:00.000Z	34 \| good	4.506 \| good	19.278 \| good	36.793 \| good	0.269 \| good	1.306 \| good	0.169 \| good
2026-03-14T22:00:00.000Z	33 \| good	5.704 \| good	24.515 \| good	36.384 \| good	0.338 \| good	1.838 \| good	0.172 \| good
2026-03-14T23:00:00.000Z	49 \| good	8.978 \| good	39.316 \| good	34.611 \| good	0.407 \| good	2.37 \| good	0.174 \| good
2026-03-15T00:00:00.000Z	52 \| moderate	10.127 \| good	44.938 \| good	32.003 \| good	0.475 \| good	2.903 \| good	0.177 \| good
2026-03-15T01:00:00.000Z	44 \| good	8.43 \| good	36.913 \| good	33.118 \| good	0.412 \| good	2.326 \| good	0.171 \| good
2026-03-15T02:00:00.000Z	38 \| good	6.728 \| good	29.804 \| good	31.814 \| good	0.348 \| good	1.749 \| good	0.165 \| good
2026-03-15T03:00:00.000Z	27 \| good	4.754 \| good	20.913 \| good	27.151 \| good	0.285 \| good	1.172 \| good	0.159 \| good
2026-03-15T04:00:00.000Z	22 \| good	3.577 \| good	15.814 \| good	23.848 \| good	0.284 \| good	1.046 \| good	0.157 \| good
2026-03-15T05:00:00.000Z	22 \| good	2.386 \| good	9.865 \| good	23.866 \| good	0.284 \| good	0.919 \| good	0.154 \| good
2026-03-15T06:00:00.000Z	19 \| good	3.063 \| good	12.175 \| good	21.39 \| good	0.283 \| good	0.792 \| good	0.151 \| good
2026-03-15T07:00:00.000Z	18 \| good	3.192 \| good	13.806 \| good	19.413 \| good	0.294 \| good	0.794 \| good	0.151 \| good
2026-03-15T08:00:00.000Z	22 \| good	3.609 \| good	15.953 \| good	18.652 \| good	0.306 \| good	0.797 \| good	0.15 \| good
2026-03-15T09:00:00.000Z	22 \| good	4.443 \| good	19.007 \| good	21.154 \| good	0.317 \| good	0.799 \| good	0.149 \| good
2026-03-15T10:00:00.000Z	27 \| good	4.973 \| good	21.695 \| good	18.482 \| good	0.36 \| good	1.526 \| good	0.157 \| good
2026-03-15T11:00:00.000Z	27 \| good	5.305 \| good	22.847 \| good	16.426 \| good	0.403 \| good	2.254 \| good	0.165 \| good
2026-03-15T12:00:00.000Z	33 \| good	5.809 \| good	25.001 \| good	21.782 \| good	0.446 \| good	2.981 \| good	0.172 \| good
2026-03-15T13:00:00.000Z	27 \| good	5.224 \| good	22.85 \| good	25.329 \| good	0.44 \| good	2.401 \| good	0.168 \| good
2026-03-15T14:00:00.000Z	27 \| good	4.639 \| good	20.062 \| good	28.996 \| good	0.435 \| good	1.821 \| good	0.164 \| good
2026-03-15T15:00:00.000Z	29 \| good	4.412 \| good	19.024 \| good	31.22 \| good	0.429 \| good	1.241 \| good	0.16 \| good
2026-03-15T16:00:00.000Z	30 \| good	5.153 \| good	22.043 \| good	32.232 \| good	0.436 \| good	1.205 \| good	0.158 \| good
2026-03-15T17:00:00.000Z	33 \| good	4.861 \| good	21.038 \| good	35.922 \| good	0.443 \| good	1.168 \| good	0.157 \| good
2026-03-15T18:00:00.000Z	34 \| good	4.321 \| good	18.929 \| good	37.419 \| good	0.451 \| good	1.132 \| good	0.156 \| good
2026-03-15T19:00:00.000Z	34 \| good	4.225 \| good	18.906 \| good	37.405 \| good	0.412 \| good	1.208 \| good	0.155 \| good
2026-03-15T20:00:00.000Z	35 \| good	4.012 \| good	17.799 \| good	38.449 \| good	0.373 \| good	1.283 \| good	0.154 \| good
2026-03-15T21:00:00.000Z	36 \| good	5.615 \| good	23.971 \| good	38.678 \| good	0.334 \| good	1.359 \| good	0.154 \| good
2026-03-15T22:00:00.000Z	37 \| good	4.716 \| good	20.787 \| good	39.904 \| good	0.31 \| good	1.441 \| good	0.154 \| good
2026-03-15T23:00:00.000Z	35 \| good	4.839 \| good	20.881 \| good	37.779 \| good	0.286 \| good	1.523 \| good	0.154 \| good
2026-03-16T00:00:00.000Z	34 \| good	4.396 \| good	19.066 \| good	36.952 \| good	0.262 \| good	1.605 \| good	0.154 \| good
2026-03-16T01:00:00.000Z	33 \| good	4.02 \| good	17.889 \| good	35.611 \| good	0.248 \| good	1.364 \| good	0.15 \| good
2026-03-16T02:00:00.000Z	32 \| good	3.419 \| good	15.098 \| good	34.67 \| good	0.234 \| good	1.123 \| good	0.146 \| good
2026-03-16T03:00:00.000Z	31 \| good	4.274 \| good	18.874 \| good	34.351 \| good	0.22 \| good	0.882 \| good	0.142 \| good
2026-03-16T04:00:00.000Z	30 \| good	4.523 \| good	19.945 \| good	32.303 \| good	0.203 \| good	0.731 \| good	0.14 \| good
2026-03-16T05:00:00.000Z	31 \| good	4.536 \| good	19.945 \| good	34.133 \| good	0.185 \| good	0.58 \| good	0.137 \| good
2026-03-16T06:00:00.000Z	32 \| good	3.998 \| good	17.856 \| good	35.391 \| good	0.168 \| good	0.429 \| good	0.135 \| good
2026-03-16T07:00:00.000Z	31 \| good	4.753 \| good	20.904 \| good	34.167 \| good	0.167 \| good	0.393 \| good	0.137 \| good
2026-03-16T08:00:00.000Z	33 \| good	6.031 \| good	26.912 \| good	33.302 \| good	0.165 \| good	0.356 \| good	0.139 \| good
2026-03-16T09:00:00.000Z	38 \| good	6.917 \| good	30.864 \| good	36.002 \| good	0.164 \| good	0.32 \| good	0.14 \| good
2026-03-16T10:00:00.000Z	38 \| good	7.189 \| good	31.982 \| good	34.858 \| good	0.171 \| good	0.546 \| good	0.143 \| good
2026-03-16T11:00:00.000Z	44 \| good	7.716 \| good	33.965 \| good	32.985 \| good	0.179 \| good	0.772 \| good	0.146 \| good
2026-03-16T12:00:00.000Z	44 \| good	8.412 \| good	37.003 \| good	36.673 \| good	0.186 \| good	0.998 \| good	0.148 \| good
2026-03-16T13:00:00.000Z	44 \| good	8.416 \| good	36.965 \| good	39.472 \| good	0.17 \| good	0.982 \| good	0.145 \| good
2026-03-16T14:00:00.000Z	49 \| good	8.62 \| good	37.901 \| good	41.485 \| good	0.154 \| good	0.967 \| good	0.142 \| good
2026-03-16T15:00:00.000Z	52 \| moderate	9.617 \| good	42.893 \| good	41.324 \| good	0.138 \| good	0.951 \| good	0.139 \| good
2026-03-16T16:00:00.000Z	49 \| good	8.648 \| good	37.877 \| good	39.675 \| good	0.133 \| good	1.164 \| good	0.134 \| good
2026-03-16T17:00:00.000Z	49 \| good	9.076 \| good	40.833 \| good	36.431 \| good	0.128 \| good	1.378 \| good	0.129 \| good
2026-03-16T18:00:00.000Z	49 \| good	8.936 \| good	39.205 \| good	35.484 \| good	0.124 \| good	1.591 \| good	0.124 \| good
2026-03-16T19:00:00.000Z	44 \| good	8.28 \| good	36.103 \| good	33.548 \| good	0.165 \| good	2.784 \| good	0.131 \| good
2026-03-16T20:00:00.000Z	44 \| good	8.416 \| good	37.003 \| good	34.95 \| good	0.206 \| good	3.978 \| good	0.138 \| 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

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 09:00:00 on 2026-03-13.

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 07:00:00 on 2026-03-14.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 31, 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 2.879 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 12.804 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 0.165 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.207 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 34.066 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 2.483 ppb.

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