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

The PM10 concentration in Portland, Maine is 82.184 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 0.651 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 36.98 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 14.053 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 10.283 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)

10.28 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

82.18 μg/m³

155

255

425

605+

Ozone (O₃)

36.98 ppb

201

201+

Sulfur Dioxide (SO₂)

0.65 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

14.05 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.27 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Portland, Maine

Get Live Pollen Counts

Portland, Maine

Scroll To Air Quality Map

Track live Portland, Maine air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	70 \| moderate	15.472 \| fine	93.519 \| fine	33.126 \| good	0.627 \| good	8.308 \| good	0.252 \| good
2025-12-27T01:00:00.000Z	70 \| moderate	16.425 \| fine	93.102 \| fine	29.385 \| good	0.681 \| good	6.874 \| good	0.288 \| good
2025-12-27T02:00:00.000Z	59 \| moderate	13.398 \| fine	72.338 \| fine	31.072 \| good	0.632 \| good	7.252 \| good	0.274 \| good
2025-12-27T03:00:00.000Z	52 \| moderate	9.806 \| good	49.392 \| good	26.662 \| good	0.599 \| good	7.567 \| good	0.274 \| good
2025-12-27T04:00:00.000Z	44 \| good	7.626 \| good	34.397 \| good	25.837 \| good	0.617 \| good	7.844 \| good	0.274 \| good
2025-12-27T05:00:00.000Z	44 \| good	7.572 \| good	34.684 \| good	27.334 \| good	0.635 \| good	7.821 \| good	0.213 \| good
2025-12-27T06:00:00.000Z	33 \| good	6.329 \| good	26.091 \| good	27.493 \| good	0.633 \| good	7.802 \| good	0.194 \| good
2025-12-27T07:00:00.000Z	28 \| good	5.324 \| good	20.371 \| good	30.218 \| good	0.632 \| good	6.864 \| good	0.194 \| good
2025-12-27T08:00:00.000Z	28 \| good	4.367 \| good	15.255 \| good	29.534 \| good	0.549 \| good	4.621 \| good	0.194 \| good
2025-12-27T09:00:00.000Z	29 \| good	3.503 \| good	10.664 \| good	31.177 \| good	0.594 \| good	7.678 \| good	0.175 \| good
2025-12-27T10:00:00.000Z	28 \| good	3.099 \| good	9.879 \| good	29.98 \| good	0.514 \| good	5.525 \| good	0.189 \| good
2025-12-27T11:00:00.000Z	24 \| good	2.89 \| good	9.129 \| good	25.917 \| good	0.547 \| good	3.121 \| good	0.175 \| good
2025-12-27T12:00:00.000Z	30 \| good	2.812 \| good	9.203 \| good	31.518 \| good	0.547 \| good	2.868 \| good	0.175 \| good
2025-12-27T13:00:00.000Z	31 \| good	2.997 \| good	13.059 \| good	33.874 \| good	0.547 \| good	2.877 \| good	0.199 \| good
2025-12-27T14:00:00.000Z	31 \| good	3.572 \| good	17.668 \| good	34.402 \| good	0.528 \| good	3.023 \| good	0.223 \| good
2025-12-27T15:00:00.000Z	31 \| good	4.107 \| good	19.461 \| good	34.169 \| good	0.547 \| good	3.541 \| good	0.248 \| good
2025-12-27T16:00:00.000Z	31 \| good	5.277 \| good	29.072 \| good	33.532 \| good	0.565 \| good	3.08 \| good	0.219 \| good
2025-12-27T17:00:00.000Z	45 \| good	8.247 \| good	49.322 \| good	33.604 \| good	0.631 \| good	2.568 \| good	0.233 \| good
2025-12-27T18:00:00.000Z	52 \| moderate	9.215 \| good	57.13 \| fine	34.382 \| good	0.663 \| good	3.101 \| good	0.194 \| good
2025-12-27T19:00:00.000Z	60 \| moderate	11.156 \| good	73.556 \| fine	34.201 \| good	0.63 \| good	4.192 \| good	0.194 \| good
2025-12-27T20:00:00.000Z	67 \| moderate	13.159 \| fine	88.334 \| fine	35.916 \| good	0.61 \| good	5.357 \| good	0.194 \| good
2025-12-27T21:00:00.000Z	66 \| moderate	12.84 \| fine	85.996 \| fine	35.328 \| good	0.606 \| good	3.516 \| good	0.228 \| good
2025-12-27T22:00:00.000Z	73 \| moderate	15.901 \| fine	98.536 \| fine	34.554 \| good	0.546 \| good	6.125 \| good	0.262 \| good
2025-12-27T23:00:00.000Z	74 \| moderate	18.579 \| fine	100.746 \| fine	33.696 \| good	0.562 \| good	10.592 \| good	0.267 \| good
2025-12-28T00:00:00.000Z	67 \| moderate	17.683 \| fine	87.602 \| fine	28.816 \| good	0.605 \| good	13.68 \| good	0.32 \| good
2025-12-28T01:00:00.000Z	66 \| moderate	17.375 \| fine	79.338 \| fine	28.718 \| good	0.522 \| good	13.157 \| good	0.393 \| good
2025-12-28T02:00:00.000Z	67 \| moderate	18.401 \| fine	70.2 \| fine	25.993 \| good	0.545 \| good	15.883 \| good	0.419 \| good
2025-12-28T03:00:00.000Z	49 \| good	9.311 \| good	41.325 \| good	15.465 \| good	0.455 \| good	10.065 \| good	0.242 \| good
2025-12-28T04:00:00.000Z	69 \| moderate	19.382 \| fine	57.139 \| fine	16.118 \| good	0.542 \| good	14.826 \| good	0.288 \| good
2025-12-28T05:00:00.000Z	67 \| moderate	17.892 \| fine	43.906 \| good	14.558 \| good	0.524 \| good	17.986 \| good	0.288 \| good
2025-12-28T06:00:00.000Z	67 \| moderate	17.798 \| fine	38.306 \| good	11.743 \| good	0.58 \| good	17.251 \| good	0.274 \| good
2025-12-28T07:00:00.000Z	67 \| moderate	17.818 \| fine	33.544 \| good	10.337 \| good	0.58 \| good	17.778 \| good	0.274 \| good
2025-12-28T08:00:00.000Z	60 \| moderate	13.942 \| fine	23.099 \| good	11.878 \| good	0.566 \| good	14.583 \| good	0.277 \| good
2025-12-28T09:00:00.000Z	54 \| moderate	11.29 \| good	19.26 \| good	16.949 \| good	0.58 \| good	18.505 \| good	0.325 \| good
2025-12-28T10:00:00.000Z	52 \| moderate	9.928 \| good	13.488 \| good	11.083 \| good	0.566 \| good	18.968 \| good	0.325 \| good
2025-12-28T11:00:00.000Z	49 \| good	9.386 \| good	12.765 \| good	15.725 \| good	0.614 \| good	15.653 \| good	0.325 \| good
2025-12-28T12:00:00.000Z	49 \| good	8.712 \| good	13.304 \| good	17.908 \| good	0.649 \| good	8.702 \| good	0.311 \| good
2025-12-28T13:00:00.000Z	49 \| good	8.612 \| good	12.874 \| good	16.268 \| good	0.649 \| good	12.208 \| good	0.311 \| good
2025-12-28T14:00:00.000Z	38 \| good	6.652 \| good	14.573 \| good	22.036 \| good	0.705 \| good	13.746 \| good	0.318 \| good
2025-12-28T15:00:00.000Z	65 \| moderate	13.746 \| fine	83.504 \| fine	23.217 \| good	1.126 \| good	9.569 \| good	0.27 \| good
2025-12-28T16:00:00.000Z	105 \| sensitive	21.442 \| fine	164.155 \| moderate	24.729 \| good	0.959 \| good	9.003 \| good	0.256 \| good
2025-12-28T17:00:00.000Z	106 \| sensitive	21.465 \| fine	165.526 \| moderate	26.504 \| good	1.55 \| good	8.043 \| good	0.236 \| good
2025-12-28T18:00:00.000Z	106 \| sensitive	20.191 \| fine	165.283 \| moderate	32.712 \| good	1.097 \| good	6.062 \| good	0.211 \| good
2025-12-28T19:00:00.000Z	88 \| moderate	15.705 \| fine	130.331 \| fine	33.673 \| good	1.091 \| good	8.426 \| good	0.211 \| good
2025-12-28T20:00:00.000Z	72 \| moderate	11.797 \| good	96.608 \| fine	35.014 \| good	0.639 \| good	9.826 \| good	0.252 \| good
2025-12-28T21:00:00.000Z	62 \| moderate	9.839 \| good	77.573 \| fine	36.098 \| good	0.651 \| good	8.869 \| good	0.25 \| good
2025-12-28T22:00:00.000Z	63 \| moderate	10.131 \| good	80.479 \| fine	37.07 \| good	0.65 \| good	14.024 \| good	0.265 \| good
2025-12-28T23:00:00.000Z	64 \| moderate	10.283 \| good	82.184 \| fine	36.98 \| good	0.651 \| good	14.053 \| good	0.266 \| good
2025-12-29T00:00:00.000Z	58 \| moderate	13.11 \| fine	59.157 \| fine	16.622 \| good	0.689 \| good	11.286 \| good	0.243 \| good
2025-12-29T01:00:00.000Z	58 \| moderate	13.437 \| fine	60.653 \| fine	17.439 \| good	0.797 \| good	11.948 \| good	0.25 \| good
2025-12-29T02:00:00.000Z	58 \| moderate	12.921 \| fine	58.6 \| fine	15.521 \| good	0.904 \| good	12.611 \| good	0.257 \| good
2025-12-29T03:00:00.000Z	60 \| moderate	14.363 \| fine	64.238 \| fine	14.785 \| good	1.012 \| good	13.274 \| good	0.264 \| good
2025-12-29T04:00:00.000Z	62 \| moderate	14.963 \| fine	66.726 \| fine	12.461 \| good	1.025 \| good	12.934 \| good	0.259 \| good
2025-12-29T05:00:00.000Z	62 \| moderate	15.429 \| fine	68.737 \| fine	12.111 \| good	1.038 \| good	12.595 \| good	0.253 \| good
2025-12-29T06:00:00.000Z	64 \| moderate	16.422 \| fine	72.753 \| fine	12.131 \| good	1.051 \| good	12.256 \| good	0.248 \| good
2025-12-29T07:00:00.000Z	66 \| moderate	17.049 \| fine	75.382 \| fine	9.855 \| good	1.022 \| good	11.97 \| good	0.237 \| good
2025-12-29T08:00:00.000Z	64 \| moderate	16.156 \| fine	71.631 \| fine	11.4 \| good	0.993 \| good	11.685 \| good	0.226 \| good
2025-12-29T09:00:00.000Z	54 \| moderate	11.293 \| good	49.969 \| good	23.051 \| good	0.964 \| good	11.399 \| good	0.215 \| good
2025-12-29T10:00:00.000Z	44 \| good	8.48 \| good	37.283 \| good	26.901 \| good	0.729 \| good	8.892 \| good	0.197 \| good
2025-12-29T11:00:00.000Z	33 \| good	6.46 \| good	28.657 \| good	28.375 \| good	0.494 \| good	6.384 \| good	0.179 \| good
2025-12-29T12:00:00.000Z	28 \| good	4.638 \| good	20.175 \| good	29.654 \| good	0.259 \| good	3.877 \| good	0.161 \| good
2025-12-29T13:00:00.000Z	30 \| good	4.805 \| good	20.916 \| good	31.869 \| good	0.244 \| good	3.437 \| good	0.157 \| good
2025-12-29T14:00:00.000Z	33 \| good	6.202 \| good	27.673 \| good	31.757 \| good	0.229 \| good	2.998 \| good	0.153 \| good
2025-12-29T15:00:00.000Z	38 \| good	6.913 \| good	30.701 \| good	28.155 \| good	0.214 \| good	2.558 \| good	0.149 \| good
2025-12-29T16:00:00.000Z	44 \| good	7.649 \| good	33.506 \| good	23.25 \| good	0.281 \| good	3.478 \| good	0.156 \| good
2025-12-29T17:00:00.000Z	49 \| good	8.817 \| good	38.769 \| good	20.072 \| good	0.348 \| good	4.398 \| good	0.162 \| good
2025-12-29T18:00:00.000Z	52 \| moderate	9.638 \| good	42.854 \| good	17.68 \| good	0.414 \| good	5.318 \| good	0.169 \| good
2025-12-29T19:00:00.000Z	52 \| moderate	10.352 \| good	45.911 \| good	15.931 \| good	0.453 \| good	6.725 \| good	0.18 \| good
2025-12-29T20:00:00.000Z	54 \| moderate	10.783 \| good	47.907 \| good	14.047 \| good	0.491 \| good	8.131 \| good	0.192 \| good
2025-12-29T21:00:00.000Z	58 \| moderate	13.36 \| fine	60.541 \| fine	8.755 \| good	0.529 \| good	9.538 \| good	0.204 \| good
2025-12-29T22:00:00.000Z	58 \| moderate	12.667 \| fine	57.118 \| fine	18.945 \| good	0.616 \| good	10.047 \| good	0.21 \| good
2025-12-29T23:00:00.000Z	54 \| moderate	10.682 \| good	47.406 \| good	27.341 \| good	0.703 \| good	10.556 \| good	0.217 \| good
2025-12-30T00:00:00.000Z	54 \| moderate	11.096 \| good	49.168 \| good	27.415 \| good	0.789 \| good	11.065 \| good	0.223 \| good
2025-12-30T01:00:00.000Z	52 \| moderate	9.575 \| good	42.901 \| good	28.384 \| good	0.606 \| good	8.052 \| good	0.21 \| good
2025-12-30T02:00:00.000Z	38 \| good	6.711 \| good	30 \| good	21.546 \| good	0.422 \| good	5.04 \| good	0.197 \| good
2025-12-30T03:00:00.000Z	33 \| good	5.694 \| good	24.362 \| good	21.496 \| good	0.238 \| good	2.027 \| good	0.184 \| good
2025-12-30T04:00:00.000Z	22 \| good	4.473 \| good	19.499 \| good	20.387 \| good	0.244 \| good	1.779 \| good	0.175 \| good
2025-12-30T05:00:00.000Z	22 \| good	3.667 \| good	16 \| good	21.363 \| good	0.25 \| good	1.531 \| good	0.166 \| good
2025-12-30T06:00:00.000Z	19 \| good	3.142 \| good	13.872 \| good	21.335 \| good	0.255 \| good	1.284 \| good	0.158 \| good
2025-12-30T07:00:00.000Z	20 \| good	2.248 \| good	9.146 \| good	21.697 \| good	0.24 \| good	1.15 \| good	0.152 \| good
2025-12-30T08:00:00.000Z	21 \| good	1.114 \| good	4.53 \| good	22.962 \| good	0.224 \| good	1.016 \| good	0.146 \| good
2025-12-30T09:00:00.000Z	22 \| good	0.862 \| good	3.224 \| good	23.772 \| good	0.209 \| good	0.882 \| good	0.141 \| good
2025-12-30T10:00:00.000Z	20 \| good	0.608 \| good	2.182 \| good	22.123 \| good	0.181 \| good	0.85 \| good	0.138 \| good
2025-12-30T11:00:00.000Z	19 \| good	0.705 \| good	2.502 \| good	20.893 \| good	0.153 \| good	0.819 \| good	0.136 \| good
2025-12-30T12:00:00.000Z	20 \| good	1.833 \| good	7.833 \| good	22.187 \| good	0.125 \| good	0.787 \| good	0.134 \| good
2025-12-30T13:00:00.000Z	23 \| good	2.234 \| good	9.208 \| good	25.026 \| good	0.12 \| good	0.674 \| good	0.134 \| good
2025-12-30T14:00:00.000Z	24 \| good	3.149 \| good	13.594 \| good	25.791 \| good	0.114 \| good	0.562 \| good	0.134 \| good
2025-12-30T15:00:00.000Z	25 \| good	3.163 \| good	13.719 \| good	26.86 \| good	0.109 \| good	0.449 \| good	0.133 \| good
2025-12-30T16:00:00.000Z	26 \| good	2.617 \| good	10.646 \| good	28.349 \| good	0.106 \| good	0.442 \| good	0.133 \| good
2025-12-30T17:00:00.000Z	26 \| good	2.865 \| good	11.797 \| good	28.458 \| good	0.104 \| good	0.435 \| good	0.133 \| good
2025-12-30T18:00:00.000Z	27 \| good	3.126 \| good	13.291 \| good	28.76 \| good	0.101 \| good	0.427 \| good	0.133 \| good
2025-12-30T19:00:00.000Z	26 \| good	2.732 \| good	11.069 \| good	28.022 \| good	0.102 \| good	0.582 \| good	0.133 \| good
2025-12-30T20:00:00.000Z	25 \| good	2.631 \| good	10.797 \| good	27.293 \| good	0.103 \| good	0.738 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	25 \| good	2.982 \| good	12 \| good	26.808 \| good	0.104 \| good	0.893 \| good	0.134 \| good
2025-12-30T22:00:00.000Z	26 \| good	3.968 \| good	17.545 \| good	27.557 \| good	0.109 \| good	0.96 \| good	0.134 \| good
2025-12-30T23:00:00.000Z	27 \| good	3.968 \| good	17.545 \| good	28.978 \| good	0.114 \| good	1.028 \| good	0.134 \| good

Portland

Get reliable air quality data to drive your business

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

0.26ppm

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

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

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 06:00:00 on 2025-12-28.

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

In the last 24 hours, the best air quality in Portland, Maine was observed at 02:00:00 on 2025-12-28.

What is the AQI in Portland, Maine right now?

As of now, the AQI in Portland, Maine is 64, indicating Moderate conditions.

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

Portland, Maine air has the highest levels of PM10.

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

Poor air quality in Portland, Maine means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Portland, Maine at the moment?

PM_2.5 levels in Portland, Maine are currently 10.283 μg/m³.

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

The PM₁₀ concentration in Portland, Maine is 82.184 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 0.266 ppm.

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

Currently, Portland, Maine has a sulfur dioxide (SO₂) concentration of 0.651 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 36.98 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 14.053 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	70 \| moderate	15.472 \| fine	93.519 \| fine	33.126 \| good	0.627 \| good	8.308 \| good	0.252 \| good
2025-12-27T01:00:00.000Z	70 \| moderate	16.425 \| fine	93.102 \| fine	29.385 \| good	0.681 \| good	6.874 \| good	0.288 \| good
2025-12-27T02:00:00.000Z	59 \| moderate	13.398 \| fine	72.338 \| fine	31.072 \| good	0.632 \| good	7.252 \| good	0.274 \| good
2025-12-27T03:00:00.000Z	52 \| moderate	9.806 \| good	49.392 \| good	26.662 \| good	0.599 \| good	7.567 \| good	0.274 \| good
2025-12-27T04:00:00.000Z	44 \| good	7.626 \| good	34.397 \| good	25.837 \| good	0.617 \| good	7.844 \| good	0.274 \| good
2025-12-27T05:00:00.000Z	44 \| good	7.572 \| good	34.684 \| good	27.334 \| good	0.635 \| good	7.821 \| good	0.213 \| good
2025-12-27T06:00:00.000Z	33 \| good	6.329 \| good	26.091 \| good	27.493 \| good	0.633 \| good	7.802 \| good	0.194 \| good
2025-12-27T07:00:00.000Z	28 \| good	5.324 \| good	20.371 \| good	30.218 \| good	0.632 \| good	6.864 \| good	0.194 \| good
2025-12-27T08:00:00.000Z	28 \| good	4.367 \| good	15.255 \| good	29.534 \| good	0.549 \| good	4.621 \| good	0.194 \| good
2025-12-27T09:00:00.000Z	29 \| good	3.503 \| good	10.664 \| good	31.177 \| good	0.594 \| good	7.678 \| good	0.175 \| good
2025-12-27T10:00:00.000Z	28 \| good	3.099 \| good	9.879 \| good	29.98 \| good	0.514 \| good	5.525 \| good	0.189 \| good
2025-12-27T11:00:00.000Z	24 \| good	2.89 \| good	9.129 \| good	25.917 \| good	0.547 \| good	3.121 \| good	0.175 \| good
2025-12-27T12:00:00.000Z	30 \| good	2.812 \| good	9.203 \| good	31.518 \| good	0.547 \| good	2.868 \| good	0.175 \| good
2025-12-27T13:00:00.000Z	31 \| good	2.997 \| good	13.059 \| good	33.874 \| good	0.547 \| good	2.877 \| good	0.199 \| good
2025-12-27T14:00:00.000Z	31 \| good	3.572 \| good	17.668 \| good	34.402 \| good	0.528 \| good	3.023 \| good	0.223 \| good
2025-12-27T15:00:00.000Z	31 \| good	4.107 \| good	19.461 \| good	34.169 \| good	0.547 \| good	3.541 \| good	0.248 \| good
2025-12-27T16:00:00.000Z	31 \| good	5.277 \| good	29.072 \| good	33.532 \| good	0.565 \| good	3.08 \| good	0.219 \| good
2025-12-27T17:00:00.000Z	45 \| good	8.247 \| good	49.322 \| good	33.604 \| good	0.631 \| good	2.568 \| good	0.233 \| good
2025-12-27T18:00:00.000Z	52 \| moderate	9.215 \| good	57.13 \| fine	34.382 \| good	0.663 \| good	3.101 \| good	0.194 \| good
2025-12-27T19:00:00.000Z	60 \| moderate	11.156 \| good	73.556 \| fine	34.201 \| good	0.63 \| good	4.192 \| good	0.194 \| good
2025-12-27T20:00:00.000Z	67 \| moderate	13.159 \| fine	88.334 \| fine	35.916 \| good	0.61 \| good	5.357 \| good	0.194 \| good
2025-12-27T21:00:00.000Z	66 \| moderate	12.84 \| fine	85.996 \| fine	35.328 \| good	0.606 \| good	3.516 \| good	0.228 \| good
2025-12-27T22:00:00.000Z	73 \| moderate	15.901 \| fine	98.536 \| fine	34.554 \| good	0.546 \| good	6.125 \| good	0.262 \| good
2025-12-27T23:00:00.000Z	74 \| moderate	18.579 \| fine	100.746 \| fine	33.696 \| good	0.562 \| good	10.592 \| good	0.267 \| good
2025-12-28T00:00:00.000Z	67 \| moderate	17.683 \| fine	87.602 \| fine	28.816 \| good	0.605 \| good	13.68 \| good	0.32 \| good
2025-12-28T01:00:00.000Z	66 \| moderate	17.375 \| fine	79.338 \| fine	28.718 \| good	0.522 \| good	13.157 \| good	0.393 \| good
2025-12-28T02:00:00.000Z	67 \| moderate	18.401 \| fine	70.2 \| fine	25.993 \| good	0.545 \| good	15.883 \| good	0.419 \| good
2025-12-28T03:00:00.000Z	49 \| good	9.311 \| good	41.325 \| good	15.465 \| good	0.455 \| good	10.065 \| good	0.242 \| good
2025-12-28T04:00:00.000Z	69 \| moderate	19.382 \| fine	57.139 \| fine	16.118 \| good	0.542 \| good	14.826 \| good	0.288 \| good
2025-12-28T05:00:00.000Z	67 \| moderate	17.892 \| fine	43.906 \| good	14.558 \| good	0.524 \| good	17.986 \| good	0.288 \| good
2025-12-28T06:00:00.000Z	67 \| moderate	17.798 \| fine	38.306 \| good	11.743 \| good	0.58 \| good	17.251 \| good	0.274 \| good
2025-12-28T07:00:00.000Z	67 \| moderate	17.818 \| fine	33.544 \| good	10.337 \| good	0.58 \| good	17.778 \| good	0.274 \| good
2025-12-28T08:00:00.000Z	60 \| moderate	13.942 \| fine	23.099 \| good	11.878 \| good	0.566 \| good	14.583 \| good	0.277 \| good
2025-12-28T09:00:00.000Z	54 \| moderate	11.29 \| good	19.26 \| good	16.949 \| good	0.58 \| good	18.505 \| good	0.325 \| good
2025-12-28T10:00:00.000Z	52 \| moderate	9.928 \| good	13.488 \| good	11.083 \| good	0.566 \| good	18.968 \| good	0.325 \| good
2025-12-28T11:00:00.000Z	49 \| good	9.386 \| good	12.765 \| good	15.725 \| good	0.614 \| good	15.653 \| good	0.325 \| good
2025-12-28T12:00:00.000Z	49 \| good	8.712 \| good	13.304 \| good	17.908 \| good	0.649 \| good	8.702 \| good	0.311 \| good
2025-12-28T13:00:00.000Z	49 \| good	8.612 \| good	12.874 \| good	16.268 \| good	0.649 \| good	12.208 \| good	0.311 \| good
2025-12-28T14:00:00.000Z	38 \| good	6.652 \| good	14.573 \| good	22.036 \| good	0.705 \| good	13.746 \| good	0.318 \| good
2025-12-28T15:00:00.000Z	65 \| moderate	13.746 \| fine	83.504 \| fine	23.217 \| good	1.126 \| good	9.569 \| good	0.27 \| good
2025-12-28T16:00:00.000Z	105 \| sensitive	21.442 \| fine	164.155 \| moderate	24.729 \| good	0.959 \| good	9.003 \| good	0.256 \| good
2025-12-28T17:00:00.000Z	106 \| sensitive	21.465 \| fine	165.526 \| moderate	26.504 \| good	1.55 \| good	8.043 \| good	0.236 \| good
2025-12-28T18:00:00.000Z	106 \| sensitive	20.191 \| fine	165.283 \| moderate	32.712 \| good	1.097 \| good	6.062 \| good	0.211 \| good
2025-12-28T19:00:00.000Z	88 \| moderate	15.705 \| fine	130.331 \| fine	33.673 \| good	1.091 \| good	8.426 \| good	0.211 \| good
2025-12-28T20:00:00.000Z	72 \| moderate	11.797 \| good	96.608 \| fine	35.014 \| good	0.639 \| good	9.826 \| good	0.252 \| good
2025-12-28T21:00:00.000Z	62 \| moderate	9.839 \| good	77.573 \| fine	36.098 \| good	0.651 \| good	8.869 \| good	0.25 \| good
2025-12-28T22:00:00.000Z	63 \| moderate	10.131 \| good	80.479 \| fine	37.07 \| good	0.65 \| good	14.024 \| good	0.265 \| good
2025-12-28T23:00:00.000Z	64 \| moderate	10.283 \| good	82.184 \| fine	36.98 \| good	0.651 \| good	14.053 \| good	0.266 \| good
2025-12-29T00:00:00.000Z	58 \| moderate	13.11 \| fine	59.157 \| fine	16.622 \| good	0.689 \| good	11.286 \| good	0.243 \| good
2025-12-29T01:00:00.000Z	58 \| moderate	13.437 \| fine	60.653 \| fine	17.439 \| good	0.797 \| good	11.948 \| good	0.25 \| good
2025-12-29T02:00:00.000Z	58 \| moderate	12.921 \| fine	58.6 \| fine	15.521 \| good	0.904 \| good	12.611 \| good	0.257 \| good
2025-12-29T03:00:00.000Z	60 \| moderate	14.363 \| fine	64.238 \| fine	14.785 \| good	1.012 \| good	13.274 \| good	0.264 \| good
2025-12-29T04:00:00.000Z	62 \| moderate	14.963 \| fine	66.726 \| fine	12.461 \| good	1.025 \| good	12.934 \| good	0.259 \| good
2025-12-29T05:00:00.000Z	62 \| moderate	15.429 \| fine	68.737 \| fine	12.111 \| good	1.038 \| good	12.595 \| good	0.253 \| good
2025-12-29T06:00:00.000Z	64 \| moderate	16.422 \| fine	72.753 \| fine	12.131 \| good	1.051 \| good	12.256 \| good	0.248 \| good
2025-12-29T07:00:00.000Z	66 \| moderate	17.049 \| fine	75.382 \| fine	9.855 \| good	1.022 \| good	11.97 \| good	0.237 \| good
2025-12-29T08:00:00.000Z	64 \| moderate	16.156 \| fine	71.631 \| fine	11.4 \| good	0.993 \| good	11.685 \| good	0.226 \| good
2025-12-29T09:00:00.000Z	54 \| moderate	11.293 \| good	49.969 \| good	23.051 \| good	0.964 \| good	11.399 \| good	0.215 \| good
2025-12-29T10:00:00.000Z	44 \| good	8.48 \| good	37.283 \| good	26.901 \| good	0.729 \| good	8.892 \| good	0.197 \| good
2025-12-29T11:00:00.000Z	33 \| good	6.46 \| good	28.657 \| good	28.375 \| good	0.494 \| good	6.384 \| good	0.179 \| good
2025-12-29T12:00:00.000Z	28 \| good	4.638 \| good	20.175 \| good	29.654 \| good	0.259 \| good	3.877 \| good	0.161 \| good
2025-12-29T13:00:00.000Z	30 \| good	4.805 \| good	20.916 \| good	31.869 \| good	0.244 \| good	3.437 \| good	0.157 \| good
2025-12-29T14:00:00.000Z	33 \| good	6.202 \| good	27.673 \| good	31.757 \| good	0.229 \| good	2.998 \| good	0.153 \| good
2025-12-29T15:00:00.000Z	38 \| good	6.913 \| good	30.701 \| good	28.155 \| good	0.214 \| good	2.558 \| good	0.149 \| good
2025-12-29T16:00:00.000Z	44 \| good	7.649 \| good	33.506 \| good	23.25 \| good	0.281 \| good	3.478 \| good	0.156 \| good
2025-12-29T17:00:00.000Z	49 \| good	8.817 \| good	38.769 \| good	20.072 \| good	0.348 \| good	4.398 \| good	0.162 \| good
2025-12-29T18:00:00.000Z	52 \| moderate	9.638 \| good	42.854 \| good	17.68 \| good	0.414 \| good	5.318 \| good	0.169 \| good
2025-12-29T19:00:00.000Z	52 \| moderate	10.352 \| good	45.911 \| good	15.931 \| good	0.453 \| good	6.725 \| good	0.18 \| good
2025-12-29T20:00:00.000Z	54 \| moderate	10.783 \| good	47.907 \| good	14.047 \| good	0.491 \| good	8.131 \| good	0.192 \| good
2025-12-29T21:00:00.000Z	58 \| moderate	13.36 \| fine	60.541 \| fine	8.755 \| good	0.529 \| good	9.538 \| good	0.204 \| good
2025-12-29T22:00:00.000Z	58 \| moderate	12.667 \| fine	57.118 \| fine	18.945 \| good	0.616 \| good	10.047 \| good	0.21 \| good
2025-12-29T23:00:00.000Z	54 \| moderate	10.682 \| good	47.406 \| good	27.341 \| good	0.703 \| good	10.556 \| good	0.217 \| good
2025-12-30T00:00:00.000Z	54 \| moderate	11.096 \| good	49.168 \| good	27.415 \| good	0.789 \| good	11.065 \| good	0.223 \| good
2025-12-30T01:00:00.000Z	52 \| moderate	9.575 \| good	42.901 \| good	28.384 \| good	0.606 \| good	8.052 \| good	0.21 \| good
2025-12-30T02:00:00.000Z	38 \| good	6.711 \| good	30 \| good	21.546 \| good	0.422 \| good	5.04 \| good	0.197 \| good
2025-12-30T03:00:00.000Z	33 \| good	5.694 \| good	24.362 \| good	21.496 \| good	0.238 \| good	2.027 \| good	0.184 \| good
2025-12-30T04:00:00.000Z	22 \| good	4.473 \| good	19.499 \| good	20.387 \| good	0.244 \| good	1.779 \| good	0.175 \| good
2025-12-30T05:00:00.000Z	22 \| good	3.667 \| good	16 \| good	21.363 \| good	0.25 \| good	1.531 \| good	0.166 \| good
2025-12-30T06:00:00.000Z	19 \| good	3.142 \| good	13.872 \| good	21.335 \| good	0.255 \| good	1.284 \| good	0.158 \| good
2025-12-30T07:00:00.000Z	20 \| good	2.248 \| good	9.146 \| good	21.697 \| good	0.24 \| good	1.15 \| good	0.152 \| good
2025-12-30T08:00:00.000Z	21 \| good	1.114 \| good	4.53 \| good	22.962 \| good	0.224 \| good	1.016 \| good	0.146 \| good
2025-12-30T09:00:00.000Z	22 \| good	0.862 \| good	3.224 \| good	23.772 \| good	0.209 \| good	0.882 \| good	0.141 \| good
2025-12-30T10:00:00.000Z	20 \| good	0.608 \| good	2.182 \| good	22.123 \| good	0.181 \| good	0.85 \| good	0.138 \| good
2025-12-30T11:00:00.000Z	19 \| good	0.705 \| good	2.502 \| good	20.893 \| good	0.153 \| good	0.819 \| good	0.136 \| good
2025-12-30T12:00:00.000Z	20 \| good	1.833 \| good	7.833 \| good	22.187 \| good	0.125 \| good	0.787 \| good	0.134 \| good
2025-12-30T13:00:00.000Z	23 \| good	2.234 \| good	9.208 \| good	25.026 \| good	0.12 \| good	0.674 \| good	0.134 \| good
2025-12-30T14:00:00.000Z	24 \| good	3.149 \| good	13.594 \| good	25.791 \| good	0.114 \| good	0.562 \| good	0.134 \| good
2025-12-30T15:00:00.000Z	25 \| good	3.163 \| good	13.719 \| good	26.86 \| good	0.109 \| good	0.449 \| good	0.133 \| good
2025-12-30T16:00:00.000Z	26 \| good	2.617 \| good	10.646 \| good	28.349 \| good	0.106 \| good	0.442 \| good	0.133 \| good
2025-12-30T17:00:00.000Z	26 \| good	2.865 \| good	11.797 \| good	28.458 \| good	0.104 \| good	0.435 \| good	0.133 \| good
2025-12-30T18:00:00.000Z	27 \| good	3.126 \| good	13.291 \| good	28.76 \| good	0.101 \| good	0.427 \| good	0.133 \| good
2025-12-30T19:00:00.000Z	26 \| good	2.732 \| good	11.069 \| good	28.022 \| good	0.102 \| good	0.582 \| good	0.133 \| good
2025-12-30T20:00:00.000Z	25 \| good	2.631 \| good	10.797 \| good	27.293 \| good	0.103 \| good	0.738 \| good	0.134 \| good
2025-12-30T21:00:00.000Z	25 \| good	2.982 \| good	12 \| good	26.808 \| good	0.104 \| good	0.893 \| good	0.134 \| good
2025-12-30T22:00:00.000Z	26 \| good	3.968 \| good	17.545 \| good	27.557 \| good	0.109 \| good	0.96 \| good	0.134 \| good
2025-12-30T23:00:00.000Z	27 \| good	3.968 \| good	17.545 \| good	28.978 \| good	0.114 \| good	1.028 \| good	0.134 \| 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

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?