What is the current level of PM10 in South Portland, Maine?

South Portland, Maine currently has a PM10 concentration of 9.886 μg/m3.

What is the current level of sulfur dioxide (SO2) in South Portland, Maine?

The current sulfur dioxide (SO2) concentration in South Portland, Maine is 0.106 ppb.

What is the current level of ozone (O3) in South Portland, Maine?

South Portland, Maine currently has an ozone (O3) concentration of 31.965 ppm.

What is the current level of nitrogen dioxide (NO2) in South Portland, Maine?

The current level of nitrogen dioxide (NO2) in South Portland, Maine is 6.265 ppb.

Current air quality index in South Portland, Maine today

Q: What is the PM2.5 concentration in South Portland, Maine right now?

South Portland, Maine currently has a PM2.5 concentration of 2.882 μg/m3.

Stay updated with real-time air quality in South 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

South Portland, Maine

Last updated: ... (Local time)

Common air pollutants in South Portland, Maine

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

5.54 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

47.97 μg/m³

155

255

425

605+

Ozone (O₃)

25.15 ppb

201

201+

Sulfur Dioxide (SO₂)

0.10 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

15.70 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 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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South Portland, Maine

Scroll To Air Quality Map

Track live South Portland, Maine air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-03-11T15:00:00.000Z	35 \| good	3.004 \| good	13.551 \| good	37.88 \| good	0.547 \| good	3.465 \| good	0.143 \| good
2026-03-11T16:00:00.000Z	35 \| good	3.601 \| good	15.29 \| good	37.879 \| good	0.53 \| good	2.951 \| good	0.165 \| good
2026-03-11T17:00:00.000Z	32 \| good	5.222 \| good	24.164 \| good	34.591 \| good	0.512 \| good	2.802 \| good	0.124 \| good
2026-03-11T18:00:00.000Z	38 \| good	7.05 \| good	24.46 \| good	38.838 \| good	0.512 \| good	0.705 \| good	0.143 \| good
2026-03-11T19:00:00.000Z	44 \| good	8.495 \| good	27.577 \| good	34.06 \| good	0.512 \| good	0.511 \| good	0.165 \| good
2026-03-11T20:00:00.000Z	52 \| moderate	9.983 \| good	29.145 \| good	41.702 \| good	0.513 \| good	0.907 \| good	0.179 \| good
2026-03-11T21:00:00.000Z	58 \| moderate	13.259 \| fine	35.03 \| good	39.827 \| good	0.465 \| good	0.809 \| good	0.143 \| good
2026-03-11T22:00:00.000Z	64 \| moderate	16.422 \| fine	38.992 \| good	36.955 \| good	0.495 \| good	0.718 \| good	0.181 \| good
2026-03-11T23:00:00.000Z	64 \| moderate	15.682 \| fine	34.003 \| good	36.944 \| good	0.513 \| good	1.077 \| good	0.162 \| good
2026-03-12T00:00:00.000Z	60 \| moderate	13.657 \| fine	27.174 \| good	34.958 \| good	0.481 \| good	1.979 \| good	0.162 \| good
2026-03-12T01:00:00.000Z	54 \| moderate	10.575 \| good	19.396 \| good	37.738 \| good	0.105 \| good	2.526 \| good	0.162 \| good
2026-03-12T02:00:00.000Z	49 \| good	8.565 \| good	14.767 \| good	31.011 \| good	0.105 \| good	4.253 \| good	0.181 \| good
2026-03-12T03:00:00.000Z	38 \| good	7.405 \| good	11.449 \| good	33.826 \| good	0.105 \| good	3.33 \| good	0.2 \| good
2026-03-12T04:00:00.000Z	38 \| good	6.994 \| good	10.197 \| good	31.785 \| good	0.105 \| good	3.456 \| good	0.2 \| good
2026-03-12T05:00:00.000Z	38 \| good	7.006 \| good	10.388 \| good	31.783 \| good	0.106 \| good	3.472 \| good	0.2 \| good
2026-03-12T06:00:00.000Z	44 \| good	7.895 \| good	12.712 \| good	25.809 \| good	0.106 \| good	3.762 \| good	0.2 \| good
2026-03-12T07:00:00.000Z	44 \| good	7.889 \| good	12.878 \| good	25.803 \| good	0.106 \| good	3.778 \| good	0.203 \| good
2026-03-12T08:00:00.000Z	33 \| good	6.142 \| good	9.799 \| good	23.925 \| good	0.205 \| good	1.984 \| good	0.188 \| good
2026-03-12T09:00:00.000Z	33 \| good	6.252 \| good	9.614 \| good	26.797 \| good	0.206 \| good	3.233 \| good	0.223 \| good
2026-03-12T10:00:00.000Z	38 \| good	6.522 \| good	9.98 \| good	22.889 \| good	0.203 \| good	3.642 \| good	0.197 \| good
2026-03-12T11:00:00.000Z	38 \| good	6.851 \| good	10.474 \| good	23.752 \| good	0.204 \| good	10.484 \| good	0.197 \| good
2026-03-12T12:00:00.000Z	44 \| good	7.872 \| good	11.954 \| good	19.886 \| good	0.302 \| good	20.019 \| good	0.222 \| good
2026-03-12T13:00:00.000Z	44 \| good	7.874 \| good	12.111 \| good	19.885 \| good	0.302 \| good	20.011 \| good	0.241 \| good
2026-03-12T14:00:00.000Z	54 \| moderate	10.559 \| good	17.94 \| good	13.178 \| good	0.302 \| good	15.099 \| good	0.241 \| good
2026-03-12T15:00:00.000Z	52 \| moderate	10.223 \| good	19.629 \| good	12.11 \| good	0.302 \| good	9.346 \| good	0.203 \| good
2026-03-12T16:00:00.000Z	56 \| moderate	12.308 \| fine	23.489 \| good	14.106 \| good	0.303 \| good	13.707 \| good	0.184 \| good
2026-03-12T17:00:00.000Z	64 \| moderate	15.662 \| fine	30.296 \| good	8.335 \| good	0.402 \| good	21.645 \| good	0.184 \| good
2026-03-12T18:00:00.000Z	66 \| moderate	16.923 \| fine	31.463 \| good	13.101 \| good	0.403 \| good	17.58 \| good	0.159 \| good
2026-03-12T19:00:00.000Z	60 \| moderate	14.261 \| fine	30.818 \| good	15.259 \| good	0.303 \| good	10.139 \| good	0.14 \| good
2026-03-12T20:00:00.000Z	52 \| moderate	9.783 \| good	19.742 \| good	20.087 \| good	0.204 \| good	12.226 \| good	0.165 \| good
2026-03-12T21:00:00.000Z	38 \| good	6.594 \| good	17.745 \| good	23.006 \| good	0.204 \| good	6.964 \| good	0.165 \| good
2026-03-12T22:00:00.000Z	28 \| good	5.046 \| good	23.566 \| good	29.902 \| good	0.204 \| good	4.088 \| good	0.143 \| good
2026-03-12T23:00:00.000Z	30 \| good	4.643 \| good	29.617 \| good	31.933 \| good	0.106 \| good	4.089 \| good	0.165 \| good
2026-03-13T00:00:00.000Z	33 \| good	3.849 \| good	26.516 \| good	35.842 \| good	0.108 \| good	2.896 \| good	0.165 \| good
2026-03-13T01:00:00.000Z	31 \| good	3.48 \| good	21.671 \| good	32.89 \| good	0.107 \| good	2.095 \| good	0.165 \| good
2026-03-13T02:00:00.000Z	27 \| good	3.474 \| good	19.657 \| good	29.061 \| good	0.11 \| good	2.095 \| good	0.165 \| good
2026-03-13T03:00:00.000Z	32 \| good	3.283 \| good	15.83 \| good	34.919 \| good	0.718 \| good	1.895 \| good	0.165 \| good
2026-03-13T04:00:00.000Z	31 \| good	2.979 \| good	11.922 \| good	33.883 \| good	0.108 \| good	2.091 \| good	0.165 \| good
2026-03-13T05:00:00.000Z	31 \| good	2.803 \| good	9.144 \| good	32.917 \| good	0.682 \| good	1.792 \| good	0.165 \| good
2026-03-13T06:00:00.000Z	30 \| good	2.713 \| good	8.184 \| good	32.013 \| good	0.689 \| good	1.696 \| good	0.145 \| good
2026-03-13T07:00:00.000Z	30 \| good	2.712 \| good	8.172 \| good	32.014 \| good	0.689 \| good	1.696 \| good	0.145 \| good
2026-03-13T08:00:00.000Z	34 \| good	2.777 \| good	8.969 \| good	36.712 \| good	0.535 \| good	2.994 \| good	0.123 \| good
2026-03-13T09:00:00.000Z	30 \| good	2.882 \| good	9.886 \| good	31.965 \| good	0.106 \| good	6.265 \| good	0.145 \| good
2026-03-13T10:00:00.000Z	26 \| good	3.079 \| good	14.795 \| good	28.059 \| good	0.498 \| good	7.976 \| good	0.166 \| good
2026-03-13T11:00:00.000Z	29 \| good	4.15 \| good	28.251 \| good	30.971 \| good	0.553 \| good	11.821 \| good	0.166 \| good
2026-03-13T12:00:00.000Z	29 \| good	4.144 \| good	28.373 \| good	30.965 \| good	0.552 \| good	11.827 \| good	0.166 \| good
2026-03-13T13:00:00.000Z	44 \| good	5.537 \| good	47.966 \| good	25.154 \| good	0.105 \| good	15.704 \| good	0.203 \| good
2026-03-13T14:00:00.000Z	44 \| good	5.537 \| good	47.966 \| good	25.154 \| good	0.105 \| good	15.704 \| good	0.203 \| good
2026-03-13T11:00:00.000Z	21 \| good	2.83 \| good	11.681 \| good	22.74 \| good	0.36 \| good	1.266 \| good	0.149 \| good
2026-03-13T12:00:00.000Z	27 \| good	4.803 \| good	20.703 \| good	27.959 \| good	0.377 \| good	1.512 \| good	0.15 \| good
2026-03-13T13:00:00.000Z	30 \| good	3.861 \| good	16.732 \| good	32.018 \| good	0.375 \| good	1.306 \| good	0.148 \| good
2026-03-13T14:00:00.000Z	33 \| good	2.4 \| good	10 \| good	35.633 \| good	0.373 \| good	1.1 \| good	0.146 \| good
2026-03-13T15:00:00.000Z	34 \| good	1.48 \| good	6 \| good	36.771 \| good	0.371 \| good	0.894 \| good	0.144 \| good
2026-03-13T16:00:00.000Z	35 \| good	2.159 \| good	8.863 \| good	38.32 \| good	0.366 \| good	0.903 \| good	0.142 \| good
2026-03-13T17:00:00.000Z	35 \| good	2.296 \| good	9.308 \| good	38.484 \| good	0.361 \| good	0.913 \| good	0.141 \| good
2026-03-13T18:00:00.000Z	34 \| good	2.416 \| good	9.878 \| good	37.43 \| good	0.357 \| good	0.922 \| good	0.14 \| good
2026-03-13T19:00:00.000Z	32 \| good	3.941 \| good	17.251 \| good	34.957 \| good	0.401 \| good	1.763 \| good	0.145 \| good
2026-03-13T20:00:00.000Z	33 \| good	5.306 \| good	22.892 \| good	36.113 \| good	0.446 \| good	2.604 \| good	0.15 \| good
2026-03-13T21:00:00.000Z	33 \| good	6.198 \| good	27.815 \| good	35.748 \| good	0.49 \| good	3.446 \| good	0.154 \| good
2026-03-13T22:00:00.000Z	33 \| good	5.681 \| good	24.59 \| good	35.859 \| good	0.507 \| good	3.652 \| good	0.159 \| good
2026-03-13T23:00:00.000Z	31 \| good	5.304 \| good	22.901 \| good	34.449 \| good	0.523 \| good	3.858 \| good	0.164 \| good
2026-03-14T00:00:00.000Z	31 \| good	4.698 \| good	20.57 \| good	34.461 \| good	0.54 \| good	4.064 \| good	0.169 \| good
2026-03-14T01:00:00.000Z	35 \| good	3.753 \| good	16.101 \| good	38.3 \| good	0.487 \| good	3.295 \| good	0.166 \| good
2026-03-14T02:00:00.000Z	37 \| good	3.44 \| good	15 \| good	40.229 \| good	0.434 \| good	2.527 \| good	0.163 \| good
2026-03-14T03:00:00.000Z	39 \| good	3.979 \| good	17.213 \| good	41.699 \| good	0.381 \| good	1.759 \| good	0.16 \| good
2026-03-14T04:00:00.000Z	37 \| good	3.423 \| good	15.184 \| good	40.307 \| good	0.322 \| good	1.373 \| good	0.155 \| good
2026-03-14T05:00:00.000Z	38 \| good	3.01 \| good	12.059 \| good	40.651 \| good	0.263 \| good	0.987 \| good	0.149 \| good
2026-03-14T06:00:00.000Z	36 \| good	2.359 \| good	9.935 \| good	38.952 \| good	0.205 \| good	0.602 \| good	0.143 \| good
2026-03-14T07:00:00.000Z	32 \| good	2.897 \| good	11.937 \| good	34.895 \| good	0.253 \| good	0.903 \| good	0.143 \| good
2026-03-14T08:00:00.000Z	31 \| good	3.54 \| good	15.323 \| good	32.517 \| good	0.302 \| good	1.203 \| good	0.142 \| good
2026-03-14T09:00:00.000Z	33 \| good	4.319 \| good	18.949 \| good	36.463 \| good	0.351 \| good	1.504 \| good	0.142 \| good
2026-03-14T10:00:00.000Z	30 \| good	4.504 \| good	19.4 \| good	31.515 \| good	0.424 \| good	2.037 \| good	0.149 \| good
2026-03-14T11:00:00.000Z	33 \| good	6.093 \| good	27 \| good	30.47 \| good	0.497 \| good	2.571 \| good	0.156 \| good
2026-03-14T12:00:00.000Z	49 \| good	8.998 \| good	40.183 \| good	33.97 \| good	0.57 \| good	3.104 \| good	0.163 \| good
2026-03-14T13:00:00.000Z	38 \| good	6.762 \| good	29.997 \| good	35.872 \| good	0.497 \| good	2.454 \| good	0.162 \| good
2026-03-14T14:00:00.000Z	34 \| good	2.765 \| good	11.147 \| good	37.134 \| good	0.425 \| good	1.804 \| good	0.161 \| good
2026-03-14T15:00:00.000Z	35 \| good	2.822 \| good	11.358 \| good	37.871 \| good	0.352 \| good	1.153 \| good	0.16 \| good
2026-03-14T16:00:00.000Z	35 \| good	4.769 \| good	20.936 \| good	38.18 \| good	0.331 \| good	1.03 \| good	0.161 \| good
2026-03-14T17:00:00.000Z	37 \| good	5.28 \| good	22.914 \| good	39.869 \| good	0.311 \| good	0.906 \| good	0.161 \| good
2026-03-14T18:00:00.000Z	37 \| good	5.081 \| good	22.01 \| good	40.167 \| good	0.29 \| good	0.783 \| good	0.162 \| good
2026-03-14T19:00:00.000Z	37 \| good	5.716 \| good	24.851 \| good	39.786 \| good	0.286 \| good	0.96 \| good	0.164 \| good
2026-03-14T20:00:00.000Z	38 \| good	6.575 \| good	29.308 \| good	40.59 \| good	0.282 \| good	1.137 \| good	0.167 \| good
2026-03-14T21:00:00.000Z	49 \| good	9.432 \| good	42.148 \| good	41.144 \| good	0.278 \| good	1.314 \| good	0.17 \| good
2026-03-14T22:00:00.000Z	52 \| moderate	10.132 \| good	45.129 \| good	41.949 \| good	0.257 \| good	1.377 \| good	0.166 \| good
2026-03-14T23:00:00.000Z	56 \| moderate	11.979 \| good	53.793 \| good	39.737 \| good	0.235 \| good	1.441 \| good	0.163 \| good
2026-03-15T00:00:00.000Z	58 \| moderate	13.283 \| fine	60.078 \| fine	34.856 \| good	0.214 \| good	1.505 \| good	0.159 \| good
2026-03-15T01:00:00.000Z	58 \| moderate	13.298 \| fine	59.571 \| fine	31.645 \| good	0.223 \| good	1.321 \| good	0.156 \| good
2026-03-15T02:00:00.000Z	54 \| moderate	11.231 \| good	49.515 \| good	28.466 \| good	0.231 \| good	1.138 \| good	0.153 \| good
2026-03-15T03:00:00.000Z	52 \| moderate	9.508 \| good	41.931 \| good	28.325 \| good	0.24 \| good	0.954 \| good	0.149 \| good
2026-03-15T04:00:00.000Z	38 \| good	6.833 \| good	29.94 \| good	28.624 \| good	0.256 \| good	0.885 \| good	0.147 \| good
2026-03-15T05:00:00.000Z	28 \| good	3.743 \| good	16.406 \| good	30.149 \| good	0.272 \| good	0.815 \| good	0.145 \| good
2026-03-15T06:00:00.000Z	43 \| good	2.67 \| good	3.759 \| good	46.094 \| good	0.288 \| good	0.743 \| good	0.143 \| good
2026-03-15T07:00:00.000Z	23 \| good	4.026 \| good	17.831 \| good	25.369 \| good	0.299 \| good	0.755 \| good	0.143 \| good
2026-03-15T08:00:00.000Z	21 \| good	3.471 \| good	15.376 \| good	22.696 \| good	0.309 \| good	0.765 \| good	0.142 \| good
2026-03-15T09:00:00.000Z	22 \| good	3.27 \| good	14.198 \| good	24.018 \| good	0.319 \| good	0.774 \| good	0.141 \| good
2026-03-15T10:00:00.000Z	19 \| good	3.345 \| good	14.594 \| good	20.835 \| good	0.341 \| good	1.226 \| good	0.146 \| good

South Portland

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near South Portland, Maine

0.14ppm

How accurate is Maine, USA air quality data?

The air quality data for Maine, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for South Portland, Maine get updated?

Air quality updates for South Portland, Maine are available every hour.

What time in the past 24 hours saw the poorest air quality in South Portland, Maine?

South Portland, Maine experienced its worst air quality at 06:00:00, 2026-03-12.

When was air quality in South Portland, Maine the best over the past 24 hours?

The best air quality in South Portland, Maine was observed at 02:00:00 on 2026-03-13.

What is the air quality in South Portland, Maine right now?

The air quality in South Portland, Maine right now is Good, with an AQI of 30.

What pollutant is most frequently found in South Portland, Maine?

In South Portland, Maine, O3 is the most frequently found pollutant.

What can I do if the air quality in South Portland, Maine is poor?

When air quality in South Portland, Maine is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in South Portland, Maine right now?

South Portland, Maine currently has a PM_2.5 concentration of 2.882 μg/m³.

What is the current level of PM₁₀ in South Portland, Maine?

South Portland, Maine currently has a PM₁₀ concentration of 9.886 μg/m³.

What is the current level of carbon monoxide (CO) in South Portland, Maine?

The current carbon monoxide (CO) level in South Portland, Maine is 0.145 ppm.

What is the current level of sulfur dioxide (SO₂) in South Portland, Maine?

The current sulfur dioxide (SO₂) concentration in South Portland, Maine is 0.106 ppb.

What is the current level of ozone (O₃) in South Portland, Maine?

South Portland, Maine currently has an ozone (O₃) concentration of 31.965 ppm.

What is the current level of nitrogen dioxide (NO₂) in South Portland, Maine?

The current level of nitrogen dioxide (NO₂) in South Portland, Maine is 6.265 ppb.

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