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

The PM10 concentration in Portland, Maine is 20.537 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 0.114 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 26.024 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 3.671 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 10.87 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)

10.87 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

20.54 μg/m³

155

255

425

605+

Ozone (O₃)

26.02 ppb

201

201+

Sulfur Dioxide (SO₂)

0.11 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.67 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.12 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
2026-06-27T20:00:00.000Z	44 \| good	7.859 \| good	13.468 \| good	30.726 \| good	0.533 \| good	2.212 \| good	0.137 \| good
2026-06-27T21:00:00.000Z	44 \| good	7.753 \| good	12.357 \| good	29.816 \| good	0.588 \| good	2.901 \| good	0.137 \| good
2026-06-27T22:00:00.000Z	44 \| good	7.553 \| good	12.563 \| good	29.817 \| good	0.573 \| good	5.85 \| good	0.137 \| good
2026-06-27T23:00:00.000Z	44 \| good	7.614 \| good	13.569 \| good	28.018 \| good	0.575 \| good	4.969 \| good	0.137 \| good
2026-06-28T00:00:00.000Z	44 \| good	7.533 \| good	12.506 \| good	31.874 \| good	0.556 \| good	4.685 \| good	0.137 \| good
2026-06-28T01:00:00.000Z	38 \| good	7.157 \| good	10.735 \| good	30.934 \| good	0.536 \| good	3.081 \| good	0.177 \| good
2026-06-28T02:00:00.000Z	38 \| good	6.628 \| good	9.433 \| good	28.975 \| good	0.516 \| good	2.099 \| good	0.177 \| good
2026-06-28T03:00:00.000Z	49 \| good	8.614 \| good	37.881 \| good	20.744 \| good	0.206 \| good	2.164 \| good	0.152 \| good
2026-06-28T04:00:00.000Z	33 \| good	5.984 \| good	7.928 \| good	28.996 \| good	0.543 \| good	3.096 \| good	0.219 \| good
2026-06-28T05:00:00.000Z	33 \| good	5.972 \| good	8.493 \| good	30.911 \| good	0.545 \| good	1.219 \| good	0.219 \| good
2026-06-28T06:00:00.000Z	33 \| good	5.987 \| good	8.236 \| good	27.925 \| good	0.513 \| good	1.907 \| good	0.192 \| good
2026-06-28T07:00:00.000Z	33 \| good	5.965 \| good	7.98 \| good	27.92 \| good	0.513 \| good	1.904 \| good	0.192 \| good
2026-06-28T08:00:00.000Z	33 \| good	6.321 \| good	8.662 \| good	30.675 \| good	0.478 \| good	1.521 \| good	0.176 \| good
2026-06-28T09:00:00.000Z	33 \| good	5.685 \| good	7.815 \| good	31.65 \| good	0.534 \| good	0.711 \| good	0.176 \| good
2026-06-28T10:00:00.000Z	30 \| good	4.687 \| good	6.733 \| good	31.628 \| good	0.529 \| good	1.214 \| good	0.176 \| good
2026-06-28T11:00:00.000Z	29 \| good	3.136 \| good	5.268 \| good	30.773 \| good	0.512 \| good	1.643 \| good	0.198 \| good
2026-06-28T12:00:00.000Z	27 \| good	5.008 \| good	7.391 \| good	26.96 \| good	0.603 \| good	6.473 \| good	0.182 \| good
2026-06-28T13:00:00.000Z	27 \| good	5.034 \| good	7.601 \| good	26.973 \| good	0.563 \| good	6.464 \| good	0.18 \| good
2026-06-28T14:00:00.000Z	33 \| good	6.254 \| good	9.662 \| good	23.157 \| good	0.561 \| good	2.696 \| good	0.145 \| good
2026-06-28T15:00:00.000Z	38 \| good	6.668 \| good	10.368 \| good	25.943 \| good	0.591 \| good	3.979 \| good	0.161 \| good
2026-06-28T16:00:00.000Z	38 \| good	7.2 \| good	12.482 \| good	24.133 \| good	0.625 \| good	5.07 \| good	0.182 \| good
2026-06-28T17:00:00.000Z	44 \| good	8.045 \| good	15.265 \| good	25.135 \| good	0.109 \| good	9.981 \| good	0.137 \| good
2026-06-28T18:00:00.000Z	49 \| good	8.669 \| good	16.555 \| good	24.238 \| good	0.109 \| good	7.621 \| good	0.137 \| good
2026-06-28T19:00:00.000Z	49 \| good	8.649 \| good	18.457 \| good	24.292 \| good	0.207 \| good	10.474 \| good	0.158 \| good
2026-06-28T20:00:00.000Z	44 \| good	8.104 \| good	16.824 \| good	25.126 \| good	0.109 \| good	5.584 \| good	0.137 \| good
2026-06-28T21:00:00.000Z	44 \| good	7.539 \| good	14.293 \| good	27.014 \| good	0.109 \| good	2.618 \| good	0.158 \| good
2026-06-28T22:00:00.000Z	38 \| good	7.225 \| good	13.687 \| good	28.017 \| good	0.109 \| good	2.841 \| good	0.158 \| good
2026-06-28T23:00:00.000Z	38 \| good	7.425 \| good	14.025 \| good	27.074 \| good	0.604 \| good	3.6 \| good	0.143 \| good
2026-06-29T00:00:00.000Z	44 \| good	7.538 \| good	12.9 \| good	27.196 \| good	0.109 \| good	4.617 \| good	0.203 \| good
2026-06-29T01:00:00.000Z	44 \| good	7.564 \| good	14.769 \| good	27.14 \| good	0.585 \| good	5.407 \| good	0.201 \| good
2026-06-29T02:00:00.000Z	38 \| good	7.397 \| good	13.915 \| good	26.191 \| good	0.617 \| good	6.563 \| good	0.209 \| good
2026-06-29T03:00:00.000Z	58 \| moderate	12.847 \| fine	57 \| fine	22.095 \| good	0.192 \| good	2.927 \| good	0.174 \| good
2026-06-29T04:00:00.000Z	38 \| good	7.333 \| good	11.578 \| good	30.77 \| good	0.664 \| good	3.14 \| good	0.188 \| good
2026-06-29T05:00:00.000Z	44 \| good	8.279 \| good	20.474 \| good	27.805 \| good	0.438 \| good	4.067 \| good	0.188 \| good
2026-06-29T06:00:00.000Z	44 \| good	7.934 \| good	16.213 \| good	23.052 \| good	0.579 \| good	5.836 \| good	0.203 \| good
2026-06-29T07:00:00.000Z	44 \| good	7.982 \| good	16.238 \| good	23.041 \| good	0.579 \| good	5.83 \| good	0.203 \| good
2026-06-29T08:00:00.000Z	49 \| good	8.602 \| good	15.391 \| good	19.833 \| good	0.447 \| good	5.225 \| good	0.182 \| good
2026-06-29T09:00:00.000Z	44 \| good	8.417 \| good	15.013 \| good	14.795 \| good	0.681 \| good	7.611 \| good	0.203 \| good
2026-06-29T10:00:00.000Z	49 \| good	8.558 \| good	16.087 \| good	10.971 \| good	0.697 \| good	7.947 \| good	0.182 \| good
2026-06-29T11:00:00.000Z	49 \| good	9.066 \| good	19.497 \| good	12.935 \| good	0.811 \| good	3.371 \| good	0.167 \| good
2026-06-29T12:00:00.000Z	52 \| moderate	9.865 \| good	20.516 \| good	14.924 \| good	1.208 \| good	3.044 \| good	0.267 \| good
2026-06-29T13:00:00.000Z	52 \| moderate	9.898 \| good	20.838 \| good	14.911 \| good	1.21 \| good	3.04 \| good	0.267 \| good
2026-06-29T14:00:00.000Z	54 \| moderate	11.115 \| good	23.25 \| good	18.959 \| good	0.11 \| good	5.132 \| good	0.188 \| good
2026-06-29T15:00:00.000Z	54 \| moderate	11.284 \| good	23.936 \| good	19.091 \| good	0.109 \| good	5.066 \| good	0.188 \| good
2026-06-29T16:00:00.000Z	54 \| moderate	11.318 \| good	23.982 \| good	22.055 \| good	0.11 \| good	5.058 \| good	0.145 \| good
2026-06-29T17:00:00.000Z	54 \| moderate	11.062 \| good	21.507 \| good	24.957 \| good	0.994 \| good	7.521 \| good	0.121 \| good
2026-06-29T18:00:00.000Z	54 \| moderate	10.87 \| good	20.537 \| good	26.024 \| good	0.114 \| good	3.671 \| good	0.121 \| good
2026-06-29T19:00:00.000Z	52 \| moderate	10.474 \| good	20.891 \| good	24.133 \| good	0.11 \| good	4.378 \| good	0.121 \| good
2026-06-29T19:00:00.000Z	54 \| moderate	10.87 \| good	20.537 \| good	26.024 \| good	0.114 \| good	3.671 \| good	0.121 \| good
2026-06-29T19:00:00.000Z	25 \| good	4.249 \| good	18.707 \| good	27.32 \| good	0.141 \| good	0.517 \| good	0.135 \| good
2026-06-29T20:00:00.000Z	28 \| good	4.299 \| good	18.861 \| good	30.454 \| good	0.137 \| good	0.572 \| good	0.134 \| good
2026-06-29T21:00:00.000Z	30 \| good	4.349 \| good	18.858 \| good	32.006 \| good	0.13 \| good	0.712 \| good	0.135 \| good
2026-06-29T22:00:00.000Z	28 \| good	5.062 \| good	21.932 \| good	29.766 \| good	0.127 \| good	0.965 \| good	0.137 \| good
2026-06-29T23:00:00.000Z	27 \| good	4.82 \| good	21.028 \| good	23.037 \| good	0.127 \| good	1.37 \| good	0.141 \| good
2026-06-30T00:00:00.000Z	27 \| good	4.776 \| good	20.928 \| good	20.761 \| good	0.132 \| good	1.85 \| good	0.144 \| good
2026-06-30T01:00:00.000Z	33 \| good	5.635 \| good	24 \| good	19.417 \| good	0.145 \| good	2.15 \| good	0.146 \| good
2026-06-30T02:00:00.000Z	33 \| good	5.666 \| good	24.126 \| good	18.155 \| good	0.15 \| good	2.22 \| good	0.146 \| good
2026-06-30T03:00:00.000Z	33 \| good	6.295 \| good	27.896 \| good	19.164 \| good	0.155 \| good	2.215 \| good	0.146 \| good
2026-06-30T04:00:00.000Z	38 \| good	7.209 \| good	31.958 \| good	18.112 \| good	0.156 \| good	2.23 \| good	0.147 \| good
2026-06-30T05:00:00.000Z	44 \| good	8.417 \| good	36.854 \| good	17.72 \| good	0.159 \| good	2.14 \| good	0.146 \| good
2026-06-30T06:00:00.000Z	49 \| good	9.096 \| good	40.645 \| good	14.939 \| good	0.171 \| good	2.164 \| good	0.147 \| good
2026-06-30T07:00:00.000Z	52 \| moderate	9.757 \| good	43.405 \| good	11.037 \| good	0.187 \| good	2.271 \| good	0.149 \| good
2026-06-30T08:00:00.000Z	52 \| moderate	10.282 \| good	45.288 \| good	10.308 \| good	0.199 \| good	2.436 \| good	0.154 \| good
2026-06-30T09:00:00.000Z	54 \| moderate	10.775 \| good	47.795 \| good	13.19 \| good	0.214 \| good	2.602 \| good	0.159 \| good
2026-06-30T10:00:00.000Z	52 \| moderate	10.227 \| good	45.484 \| good	9.546 \| good	0.212 \| good	2.663 \| good	0.165 \| good
2026-06-30T11:00:00.000Z	52 \| moderate	10.353 \| good	45.942 \| good	12.274 \| good	0.196 \| good	2.398 \| good	0.172 \| good
2026-06-30T12:00:00.000Z	49 \| good	9.068 \| good	39.78 \| good	16.76 \| good	0.211 \| good	2.181 \| good	0.178 \| good
2026-06-30T13:00:00.000Z	38 \| good	7.463 \| good	33.005 \| good	22.693 \| good	0.237 \| good	1.842 \| good	0.184 \| good
2026-06-30T14:00:00.000Z	44 \| good	7.923 \| good	35.107 \| good	26.749 \| good	0.244 \| good	1.625 \| good	0.189 \| good
2026-06-30T15:00:00.000Z	44 \| good	8.16 \| good	36.193 \| good	27.336 \| good	0.243 \| good	1.402 \| good	0.192 \| good
2026-06-30T16:00:00.000Z	44 \| good	7.627 \| good	33.626 \| good	29.723 \| good	0.24 \| good	1.265 \| good	0.194 \| good
2026-06-30T17:00:00.000Z	49 \| good	8.514 \| good	37.633 \| good	32.324 \| good	0.234 \| good	1.203 \| good	0.196 \| good
2026-06-30T18:00:00.000Z	52 \| moderate	9.514 \| good	42.329 \| good	39.05 \| good	0.226 \| good	1.188 \| good	0.197 \| good
2026-06-30T19:00:00.000Z	54 \| moderate	11.383 \| good	51.029 \| good	47.126 \| good	0.223 \| good	1.202 \| good	0.196 \| good
2026-06-30T20:00:00.000Z	56 \| moderate	12.428 \| fine	56.052 \| fine	53.193 \| good	0.218 \| good	1.256 \| good	0.195 \| good
2026-06-30T21:00:00.000Z	58 \| moderate	12.553 \| fine	56.262 \| fine	50.802 \| good	0.212 \| good	1.375 \| good	0.193 \| good
2026-06-30T22:00:00.000Z	58 \| moderate	13.115 \| fine	59.462 \| fine	48.315 \| good	0.207 \| good	1.579 \| good	0.192 \| good
2026-06-30T23:00:00.000Z	64 \| moderate	16 \| fine	71.435 \| fine	46.442 \| good	0.205 \| good	1.849 \| good	0.189 \| good
2026-07-01T00:00:00.000Z	60 \| moderate	13.644 \| fine	61.715 \| fine	33.126 \| good	0.213 \| good	2.098 \| good	0.187 \| good
2026-07-01T01:00:00.000Z	58 \| moderate	13.081 \| fine	58.757 \| fine	33.347 \| good	0.235 \| good	2.444 \| good	0.187 \| good
2026-07-01T02:00:00.000Z	62 \| moderate	15.339 \| fine	68.586 \| fine	38.138 \| good	0.246 \| good	2.423 \| good	0.187 \| good
2026-07-01T03:00:00.000Z	64 \| moderate	15.644 \| fine	69.215 \| fine	43.515 \| good	0.224 \| good	2.145 \| good	0.186 \| good
2026-07-01T04:00:00.000Z	62 \| moderate	15.356 \| fine	68.836 \| fine	40.501 \| good	0.176 \| good	1.618 \| good	0.177 \| good
2026-07-01T05:00:00.000Z	60 \| moderate	13.961 \| fine	62.34 \| fine	38.074 \| good	0.154 \| good	1.431 \| good	0.17 \| good
2026-07-01T06:00:00.000Z	56 \| moderate	12.26 \| fine	55.253 \| fine	32.788 \| good	0.17 \| good	1.533 \| good	0.164 \| good
2026-07-01T07:00:00.000Z	56 \| moderate	12.062 \| good	54.151 \| good	30.193 \| good	0.18 \| good	1.794 \| good	0.157 \| good
2026-07-01T08:00:00.000Z	56 \| moderate	12.354 \| fine	55.705 \| fine	26.148 \| good	0.192 \| good	2.121 \| good	0.153 \| good
2026-07-01T09:00:00.000Z	58 \| moderate	13.125 \| fine	58.636 \| fine	25.202 \| good	0.206 \| good	2.48 \| good	0.154 \| good
2026-07-01T10:00:00.000Z	58 \| moderate	12.862 \| fine	57.462 \| fine	22.473 \| good	0.212 \| good	2.626 \| good	0.159 \| good
2026-07-01T11:00:00.000Z	60 \| moderate	13.731 \| fine	61.545 \| fine	24.239 \| good	0.211 \| good	2.383 \| good	0.166 \| good
2026-07-01T12:00:00.000Z	60 \| moderate	13.778 \| fine	61.659 \| fine	25.759 \| good	0.232 \| good	2.068 \| good	0.173 \| good
2026-07-01T13:00:00.000Z	60 \| moderate	14.036 \| fine	62.664 \| fine	27.688 \| good	0.239 \| good	1.617 \| good	0.178 \| good
2026-07-01T14:00:00.000Z	62 \| moderate	14.889 \| fine	66.284 \| fine	31.693 \| good	0.242 \| good	1.111 \| good	0.18 \| good
2026-07-01T15:00:00.000Z	60 \| moderate	14.182 \| fine	64.024 \| fine	33.202 \| good	0.263 \| good	0.795 \| good	0.18 \| good
2026-07-01T16:00:00.000Z	60 \| moderate	13.798 \| fine	61.712 \| fine	34.291 \| good	0.319 \| good	0.621 \| good	0.18 \| good
2026-07-01T17:00:00.000Z	58 \| moderate	13.095 \| fine	59.147 \| fine	35.69 \| good	0.322 \| good	0.578 \| good	0.18 \| good
2026-07-01T18:00:00.000Z	52 \| moderate	9.638 \| good	43.021 \| good	30.442 \| good	0.297 \| good	0.586 \| good	0.18 \| good

Portland

Get reliable air quality data to drive your business

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

0.12ppm

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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Check live rankings of places in the USA affected by air pollution.

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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 03:00:00 on 2026-06-29.

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

In the last 24 hours, the best air quality in Portland, Maine was observed at 04:00:00 on 2026-06-29.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 54, 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 10.87 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 20.537 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 0.121 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.114 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 26.024 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 3.671 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-27T20:00:00.000Z	44 \| good	7.859 \| good	13.468 \| good	30.726 \| good	0.533 \| good	2.212 \| good	0.137 \| good
2026-06-27T21:00:00.000Z	44 \| good	7.753 \| good	12.357 \| good	29.816 \| good	0.588 \| good	2.901 \| good	0.137 \| good
2026-06-27T22:00:00.000Z	44 \| good	7.553 \| good	12.563 \| good	29.817 \| good	0.573 \| good	5.85 \| good	0.137 \| good
2026-06-27T23:00:00.000Z	44 \| good	7.614 \| good	13.569 \| good	28.018 \| good	0.575 \| good	4.969 \| good	0.137 \| good
2026-06-28T00:00:00.000Z	44 \| good	7.533 \| good	12.506 \| good	31.874 \| good	0.556 \| good	4.685 \| good	0.137 \| good
2026-06-28T01:00:00.000Z	38 \| good	7.157 \| good	10.735 \| good	30.934 \| good	0.536 \| good	3.081 \| good	0.177 \| good
2026-06-28T02:00:00.000Z	38 \| good	6.628 \| good	9.433 \| good	28.975 \| good	0.516 \| good	2.099 \| good	0.177 \| good
2026-06-28T03:00:00.000Z	49 \| good	8.614 \| good	37.881 \| good	20.744 \| good	0.206 \| good	2.164 \| good	0.152 \| good
2026-06-28T04:00:00.000Z	33 \| good	5.984 \| good	7.928 \| good	28.996 \| good	0.543 \| good	3.096 \| good	0.219 \| good
2026-06-28T05:00:00.000Z	33 \| good	5.972 \| good	8.493 \| good	30.911 \| good	0.545 \| good	1.219 \| good	0.219 \| good
2026-06-28T06:00:00.000Z	33 \| good	5.987 \| good	8.236 \| good	27.925 \| good	0.513 \| good	1.907 \| good	0.192 \| good
2026-06-28T07:00:00.000Z	33 \| good	5.965 \| good	7.98 \| good	27.92 \| good	0.513 \| good	1.904 \| good	0.192 \| good
2026-06-28T08:00:00.000Z	33 \| good	6.321 \| good	8.662 \| good	30.675 \| good	0.478 \| good	1.521 \| good	0.176 \| good
2026-06-28T09:00:00.000Z	33 \| good	5.685 \| good	7.815 \| good	31.65 \| good	0.534 \| good	0.711 \| good	0.176 \| good
2026-06-28T10:00:00.000Z	30 \| good	4.687 \| good	6.733 \| good	31.628 \| good	0.529 \| good	1.214 \| good	0.176 \| good
2026-06-28T11:00:00.000Z	29 \| good	3.136 \| good	5.268 \| good	30.773 \| good	0.512 \| good	1.643 \| good	0.198 \| good
2026-06-28T12:00:00.000Z	27 \| good	5.008 \| good	7.391 \| good	26.96 \| good	0.603 \| good	6.473 \| good	0.182 \| good
2026-06-28T13:00:00.000Z	27 \| good	5.034 \| good	7.601 \| good	26.973 \| good	0.563 \| good	6.464 \| good	0.18 \| good
2026-06-28T14:00:00.000Z	33 \| good	6.254 \| good	9.662 \| good	23.157 \| good	0.561 \| good	2.696 \| good	0.145 \| good
2026-06-28T15:00:00.000Z	38 \| good	6.668 \| good	10.368 \| good	25.943 \| good	0.591 \| good	3.979 \| good	0.161 \| good
2026-06-28T16:00:00.000Z	38 \| good	7.2 \| good	12.482 \| good	24.133 \| good	0.625 \| good	5.07 \| good	0.182 \| good
2026-06-28T17:00:00.000Z	44 \| good	8.045 \| good	15.265 \| good	25.135 \| good	0.109 \| good	9.981 \| good	0.137 \| good
2026-06-28T18:00:00.000Z	49 \| good	8.669 \| good	16.555 \| good	24.238 \| good	0.109 \| good	7.621 \| good	0.137 \| good
2026-06-28T19:00:00.000Z	49 \| good	8.649 \| good	18.457 \| good	24.292 \| good	0.207 \| good	10.474 \| good	0.158 \| good
2026-06-28T20:00:00.000Z	44 \| good	8.104 \| good	16.824 \| good	25.126 \| good	0.109 \| good	5.584 \| good	0.137 \| good
2026-06-28T21:00:00.000Z	44 \| good	7.539 \| good	14.293 \| good	27.014 \| good	0.109 \| good	2.618 \| good	0.158 \| good
2026-06-28T22:00:00.000Z	38 \| good	7.225 \| good	13.687 \| good	28.017 \| good	0.109 \| good	2.841 \| good	0.158 \| good
2026-06-28T23:00:00.000Z	38 \| good	7.425 \| good	14.025 \| good	27.074 \| good	0.604 \| good	3.6 \| good	0.143 \| good
2026-06-29T00:00:00.000Z	44 \| good	7.538 \| good	12.9 \| good	27.196 \| good	0.109 \| good	4.617 \| good	0.203 \| good
2026-06-29T01:00:00.000Z	44 \| good	7.564 \| good	14.769 \| good	27.14 \| good	0.585 \| good	5.407 \| good	0.201 \| good
2026-06-29T02:00:00.000Z	38 \| good	7.397 \| good	13.915 \| good	26.191 \| good	0.617 \| good	6.563 \| good	0.209 \| good
2026-06-29T03:00:00.000Z	58 \| moderate	12.847 \| fine	57 \| fine	22.095 \| good	0.192 \| good	2.927 \| good	0.174 \| good
2026-06-29T04:00:00.000Z	38 \| good	7.333 \| good	11.578 \| good	30.77 \| good	0.664 \| good	3.14 \| good	0.188 \| good
2026-06-29T05:00:00.000Z	44 \| good	8.279 \| good	20.474 \| good	27.805 \| good	0.438 \| good	4.067 \| good	0.188 \| good
2026-06-29T06:00:00.000Z	44 \| good	7.934 \| good	16.213 \| good	23.052 \| good	0.579 \| good	5.836 \| good	0.203 \| good
2026-06-29T07:00:00.000Z	44 \| good	7.982 \| good	16.238 \| good	23.041 \| good	0.579 \| good	5.83 \| good	0.203 \| good
2026-06-29T08:00:00.000Z	49 \| good	8.602 \| good	15.391 \| good	19.833 \| good	0.447 \| good	5.225 \| good	0.182 \| good
2026-06-29T09:00:00.000Z	44 \| good	8.417 \| good	15.013 \| good	14.795 \| good	0.681 \| good	7.611 \| good	0.203 \| good
2026-06-29T10:00:00.000Z	49 \| good	8.558 \| good	16.087 \| good	10.971 \| good	0.697 \| good	7.947 \| good	0.182 \| good
2026-06-29T11:00:00.000Z	49 \| good	9.066 \| good	19.497 \| good	12.935 \| good	0.811 \| good	3.371 \| good	0.167 \| good
2026-06-29T12:00:00.000Z	52 \| moderate	9.865 \| good	20.516 \| good	14.924 \| good	1.208 \| good	3.044 \| good	0.267 \| good
2026-06-29T13:00:00.000Z	52 \| moderate	9.898 \| good	20.838 \| good	14.911 \| good	1.21 \| good	3.04 \| good	0.267 \| good
2026-06-29T14:00:00.000Z	54 \| moderate	11.115 \| good	23.25 \| good	18.959 \| good	0.11 \| good	5.132 \| good	0.188 \| good
2026-06-29T15:00:00.000Z	54 \| moderate	11.284 \| good	23.936 \| good	19.091 \| good	0.109 \| good	5.066 \| good	0.188 \| good
2026-06-29T16:00:00.000Z	54 \| moderate	11.318 \| good	23.982 \| good	22.055 \| good	0.11 \| good	5.058 \| good	0.145 \| good
2026-06-29T17:00:00.000Z	54 \| moderate	11.062 \| good	21.507 \| good	24.957 \| good	0.994 \| good	7.521 \| good	0.121 \| good
2026-06-29T18:00:00.000Z	54 \| moderate	10.87 \| good	20.537 \| good	26.024 \| good	0.114 \| good	3.671 \| good	0.121 \| good
2026-06-29T19:00:00.000Z	52 \| moderate	10.474 \| good	20.891 \| good	24.133 \| good	0.11 \| good	4.378 \| good	0.121 \| good
2026-06-29T19:00:00.000Z	54 \| moderate	10.87 \| good	20.537 \| good	26.024 \| good	0.114 \| good	3.671 \| good	0.121 \| good
2026-06-29T19:00:00.000Z	25 \| good	4.249 \| good	18.707 \| good	27.32 \| good	0.141 \| good	0.517 \| good	0.135 \| good
2026-06-29T20:00:00.000Z	28 \| good	4.299 \| good	18.861 \| good	30.454 \| good	0.137 \| good	0.572 \| good	0.134 \| good
2026-06-29T21:00:00.000Z	30 \| good	4.349 \| good	18.858 \| good	32.006 \| good	0.13 \| good	0.712 \| good	0.135 \| good
2026-06-29T22:00:00.000Z	28 \| good	5.062 \| good	21.932 \| good	29.766 \| good	0.127 \| good	0.965 \| good	0.137 \| good
2026-06-29T23:00:00.000Z	27 \| good	4.82 \| good	21.028 \| good	23.037 \| good	0.127 \| good	1.37 \| good	0.141 \| good
2026-06-30T00:00:00.000Z	27 \| good	4.776 \| good	20.928 \| good	20.761 \| good	0.132 \| good	1.85 \| good	0.144 \| good
2026-06-30T01:00:00.000Z	33 \| good	5.635 \| good	24 \| good	19.417 \| good	0.145 \| good	2.15 \| good	0.146 \| good
2026-06-30T02:00:00.000Z	33 \| good	5.666 \| good	24.126 \| good	18.155 \| good	0.15 \| good	2.22 \| good	0.146 \| good
2026-06-30T03:00:00.000Z	33 \| good	6.295 \| good	27.896 \| good	19.164 \| good	0.155 \| good	2.215 \| good	0.146 \| good
2026-06-30T04:00:00.000Z	38 \| good	7.209 \| good	31.958 \| good	18.112 \| good	0.156 \| good	2.23 \| good	0.147 \| good
2026-06-30T05:00:00.000Z	44 \| good	8.417 \| good	36.854 \| good	17.72 \| good	0.159 \| good	2.14 \| good	0.146 \| good
2026-06-30T06:00:00.000Z	49 \| good	9.096 \| good	40.645 \| good	14.939 \| good	0.171 \| good	2.164 \| good	0.147 \| good
2026-06-30T07:00:00.000Z	52 \| moderate	9.757 \| good	43.405 \| good	11.037 \| good	0.187 \| good	2.271 \| good	0.149 \| good
2026-06-30T08:00:00.000Z	52 \| moderate	10.282 \| good	45.288 \| good	10.308 \| good	0.199 \| good	2.436 \| good	0.154 \| good
2026-06-30T09:00:00.000Z	54 \| moderate	10.775 \| good	47.795 \| good	13.19 \| good	0.214 \| good	2.602 \| good	0.159 \| good
2026-06-30T10:00:00.000Z	52 \| moderate	10.227 \| good	45.484 \| good	9.546 \| good	0.212 \| good	2.663 \| good	0.165 \| good
2026-06-30T11:00:00.000Z	52 \| moderate	10.353 \| good	45.942 \| good	12.274 \| good	0.196 \| good	2.398 \| good	0.172 \| good
2026-06-30T12:00:00.000Z	49 \| good	9.068 \| good	39.78 \| good	16.76 \| good	0.211 \| good	2.181 \| good	0.178 \| good
2026-06-30T13:00:00.000Z	38 \| good	7.463 \| good	33.005 \| good	22.693 \| good	0.237 \| good	1.842 \| good	0.184 \| good
2026-06-30T14:00:00.000Z	44 \| good	7.923 \| good	35.107 \| good	26.749 \| good	0.244 \| good	1.625 \| good	0.189 \| good
2026-06-30T15:00:00.000Z	44 \| good	8.16 \| good	36.193 \| good	27.336 \| good	0.243 \| good	1.402 \| good	0.192 \| good
2026-06-30T16:00:00.000Z	44 \| good	7.627 \| good	33.626 \| good	29.723 \| good	0.24 \| good	1.265 \| good	0.194 \| good
2026-06-30T17:00:00.000Z	49 \| good	8.514 \| good	37.633 \| good	32.324 \| good	0.234 \| good	1.203 \| good	0.196 \| good
2026-06-30T18:00:00.000Z	52 \| moderate	9.514 \| good	42.329 \| good	39.05 \| good	0.226 \| good	1.188 \| good	0.197 \| good
2026-06-30T19:00:00.000Z	54 \| moderate	11.383 \| good	51.029 \| good	47.126 \| good	0.223 \| good	1.202 \| good	0.196 \| good
2026-06-30T20:00:00.000Z	56 \| moderate	12.428 \| fine	56.052 \| fine	53.193 \| good	0.218 \| good	1.256 \| good	0.195 \| good
2026-06-30T21:00:00.000Z	58 \| moderate	12.553 \| fine	56.262 \| fine	50.802 \| good	0.212 \| good	1.375 \| good	0.193 \| good
2026-06-30T22:00:00.000Z	58 \| moderate	13.115 \| fine	59.462 \| fine	48.315 \| good	0.207 \| good	1.579 \| good	0.192 \| good
2026-06-30T23:00:00.000Z	64 \| moderate	16 \| fine	71.435 \| fine	46.442 \| good	0.205 \| good	1.849 \| good	0.189 \| good
2026-07-01T00:00:00.000Z	60 \| moderate	13.644 \| fine	61.715 \| fine	33.126 \| good	0.213 \| good	2.098 \| good	0.187 \| good
2026-07-01T01:00:00.000Z	58 \| moderate	13.081 \| fine	58.757 \| fine	33.347 \| good	0.235 \| good	2.444 \| good	0.187 \| good
2026-07-01T02:00:00.000Z	62 \| moderate	15.339 \| fine	68.586 \| fine	38.138 \| good	0.246 \| good	2.423 \| good	0.187 \| good
2026-07-01T03:00:00.000Z	64 \| moderate	15.644 \| fine	69.215 \| fine	43.515 \| good	0.224 \| good	2.145 \| good	0.186 \| good
2026-07-01T04:00:00.000Z	62 \| moderate	15.356 \| fine	68.836 \| fine	40.501 \| good	0.176 \| good	1.618 \| good	0.177 \| good
2026-07-01T05:00:00.000Z	60 \| moderate	13.961 \| fine	62.34 \| fine	38.074 \| good	0.154 \| good	1.431 \| good	0.17 \| good
2026-07-01T06:00:00.000Z	56 \| moderate	12.26 \| fine	55.253 \| fine	32.788 \| good	0.17 \| good	1.533 \| good	0.164 \| good
2026-07-01T07:00:00.000Z	56 \| moderate	12.062 \| good	54.151 \| good	30.193 \| good	0.18 \| good	1.794 \| good	0.157 \| good
2026-07-01T08:00:00.000Z	56 \| moderate	12.354 \| fine	55.705 \| fine	26.148 \| good	0.192 \| good	2.121 \| good	0.153 \| good
2026-07-01T09:00:00.000Z	58 \| moderate	13.125 \| fine	58.636 \| fine	25.202 \| good	0.206 \| good	2.48 \| good	0.154 \| good
2026-07-01T10:00:00.000Z	58 \| moderate	12.862 \| fine	57.462 \| fine	22.473 \| good	0.212 \| good	2.626 \| good	0.159 \| good
2026-07-01T11:00:00.000Z	60 \| moderate	13.731 \| fine	61.545 \| fine	24.239 \| good	0.211 \| good	2.383 \| good	0.166 \| good
2026-07-01T12:00:00.000Z	60 \| moderate	13.778 \| fine	61.659 \| fine	25.759 \| good	0.232 \| good	2.068 \| good	0.173 \| good
2026-07-01T13:00:00.000Z	60 \| moderate	14.036 \| fine	62.664 \| fine	27.688 \| good	0.239 \| good	1.617 \| good	0.178 \| good
2026-07-01T14:00:00.000Z	62 \| moderate	14.889 \| fine	66.284 \| fine	31.693 \| good	0.242 \| good	1.111 \| good	0.18 \| good
2026-07-01T15:00:00.000Z	60 \| moderate	14.182 \| fine	64.024 \| fine	33.202 \| good	0.263 \| good	0.795 \| good	0.18 \| good
2026-07-01T16:00:00.000Z	60 \| moderate	13.798 \| fine	61.712 \| fine	34.291 \| good	0.319 \| good	0.621 \| good	0.18 \| good
2026-07-01T17:00:00.000Z	58 \| moderate	13.095 \| fine	59.147 \| fine	35.69 \| good	0.322 \| good	0.578 \| good	0.18 \| good
2026-07-01T18:00:00.000Z	52 \| moderate	9.638 \| good	43.021 \| good	30.442 \| good	0.297 \| good	0.586 \| good	0.18 \| 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?

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?