What is the sulfur dioxide (SO2) level in Portsmouth, New Hampshire at the moment?

Currently, Portsmouth, New Hampshire has a sulfur dioxide (SO2) concentration of 0.7 ppb.

What is the ozone (O3) level in Portsmouth, New Hampshire at the moment?

The current ozone (O3) level in Portsmouth, New Hampshire at the moment is 36.005 ppm.

What is the nitrogen dioxide (NO2) level in Portsmouth, New Hampshire at the moment?

Nitrogen dioxide (NO2) level in Portsmouth, New Hampshire at the moment is 14.917 ppb.

Live air quality index in Portsmouth, New Hampshire today

Q: What is the PM2.5 level in Portsmouth, New Hampshire at the moment?

PM2.5 levels in Portsmouth, New Hampshire are currently 5.499 μg/m3.

Q: What is the PM10 level in Portsmouth, New Hampshire at the moment?

The PM10 concentration in Portsmouth, New Hampshire is 31.974 μg/m3 at the moment.

Stay updated with real-time air quality in Portsmouth, New Hampshire 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

Portsmouth, New Hampshire

Last updated: ... (Local time)

Major air pollutants in Portsmouth, New Hampshire

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

5.50 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

31.97 μg/m³

155

255

425

605+

Ozone (O₃)

36.01 ppb

201

201+

Sulfur Dioxide (SO₂)

0.70 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

14.92 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.29 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Portsmouth, New Hampshire

Get Live Pollen Counts

Portsmouth, New Hampshire

Scroll To Air Quality Map

Track live Portsmouth, New Hampshire air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	29 \| good	4.506 \| good	15.043 \| good	31.001 \| good	0.6 \| good	13.35 \| good	0.277 \| good
2025-12-27T01:00:00.000Z	27 \| good	4.907 \| good	16.045 \| good	28.003 \| good	0.799 \| good	7.689 \| good	0.318 \| good
2025-12-27T02:00:00.000Z	27 \| good	5.207 \| good	15.054 \| good	28.98 \| good	0.6 \| good	7.428 \| good	0.303 \| good
2025-12-27T03:00:00.000Z	33 \| good	5.608 \| good	14.054 \| good	27.989 \| good	0.6 \| good	8.099 \| good	0.303 \| good
2025-12-27T04:00:00.000Z	27 \| good	5.109 \| good	12.057 \| good	27.987 \| good	0.6 \| good	8.239 \| good	0.303 \| good
2025-12-27T05:00:00.000Z	28 \| good	4.111 \| good	9.061 \| good	29.982 \| good	0.6 \| good	8.482 \| good	0.231 \| good
2025-12-27T06:00:00.000Z	30 \| good	3.411 \| good	7.057 \| good	31.98 \| good	0.6 \| good	8.105 \| good	0.209 \| good
2025-12-27T07:00:00.000Z	31 \| good	3.411 \| good	7.055 \| good	33.981 \| good	0.6 \| good	7.081 \| good	0.209 \| good
2025-12-27T08:00:00.000Z	31 \| good	3.011 \| good	6.05 \| good	33.988 \| good	0.5 \| good	4.748 \| good	0.209 \| good
2025-12-27T09:00:00.000Z	31 \| good	2.805 \| good	6.041 \| good	33.995 \| good	0.5 \| good	5.676 \| good	0.186 \| good
2025-12-27T10:00:00.000Z	31 \| good	2.603 \| good	5.039 \| good	33.001 \| good	0.4 \| good	5.443 \| good	0.2 \| good
2025-12-27T11:00:00.000Z	31 \| good	2.402 \| good	4.026 \| good	32.999 \| good	0.5 \| good	3.335 \| good	0.186 \| good
2025-12-27T12:00:00.000Z	30 \| good	2.402 \| good	4.02 \| good	32.003 \| good	0.5 \| good	3.273 \| good	0.186 \| good
2025-12-27T13:00:00.000Z	31 \| good	2.301 \| good	4.025 \| good	34 \| good	0.5 \| good	3.173 \| good	0.2 \| good
2025-12-27T14:00:00.000Z	31 \| good	1.902 \| good	3.036 \| good	33.007 \| good	0.5 \| good	3.274 \| good	0.237 \| good
2025-12-27T15:00:00.000Z	32 \| good	2.102 \| good	3.026 \| good	34.999 \| good	0.5 \| good	4.342 \| good	0.251 \| good
2025-12-27T16:00:00.000Z	31 \| good	2.202 \| good	3.026 \| good	34 \| good	0.5 \| good	3.771 \| good	0.223 \| good
2025-12-27T17:00:00.000Z	31 \| good	2.401 \| good	4.024 \| good	34.002 \| good	0.699 \| good	2.896 \| good	0.237 \| good
2025-12-27T18:00:00.000Z	31 \| good	2.501 \| good	5.023 \| good	34.006 \| good	0.799 \| good	3.113 \| good	0.209 \| good
2025-12-27T19:00:00.000Z	31 \| good	2.7 \| good	6.011 \| good	34.01 \| good	0.699 \| good	4.67 \| good	0.209 \| good
2025-12-27T20:00:00.000Z	32 \| good	2.9 \| good	7.009 \| good	35.008 \| good	0.699 \| good	5.258 \| good	0.209 \| good
2025-12-27T21:00:00.000Z	32 \| good	3.199 \| good	9.007 \| good	35.008 \| good	0.799 \| good	3.533 \| good	0.246 \| good
2025-12-27T22:00:00.000Z	32 \| good	3.201 \| good	11.007 \| good	35.003 \| good	0.599 \| good	8.558 \| good	0.282 \| good
2025-12-27T23:00:00.000Z	33 \| good	4.5 \| good	18 \| good	35.993 \| good	0.599 \| good	6.475 \| good	0.291 \| good
2025-12-28T00:00:00.000Z	52 \| moderate	9.882 \| good	36.955 \| good	21.037 \| good	0.699 \| good	14.772 \| good	0.35 \| good
2025-12-28T01:00:00.000Z	58 \| moderate	13.273 \| fine	44.939 \| good	16.042 \| good	0.599 \| good	11.525 \| good	0.432 \| good
2025-12-28T02:00:00.000Z	58 \| moderate	13.275 \| fine	44.929 \| good	14.039 \| good	0.5 \| good	11.589 \| good	0.468 \| good
2025-12-28T03:00:00.000Z	49 \| good	8.885 \| good	39.213 \| good	21.416 \| good	0.516 \| good	8.664 \| good	0.238 \| good
2025-12-28T04:00:00.000Z	54 \| moderate	11.49 \| good	26.027 \| good	10.023 \| good	0.599 \| good	11.73 \| good	0.318 \| good
2025-12-28T05:00:00.000Z	52 \| moderate	10.493 \| good	21.038 \| good	10.022 \| good	0.5 \| good	14.148 \| good	0.318 \| good
2025-12-28T06:00:00.000Z	52 \| moderate	9.797 \| good	18.061 \| good	14.006 \| good	0.6 \| good	13.214 \| good	0.304 \| good
2025-12-28T07:00:00.000Z	52 \| moderate	9.801 \| good	18.102 \| good	7.037 \| good	0.6 \| good	15.282 \| good	0.304 \| good
2025-12-28T08:00:00.000Z	52 \| moderate	9.606 \| good	16.108 \| good	15.008 \| good	0.5 \| good	12.579 \| good	0.291 \| good
2025-12-28T09:00:00.000Z	52 \| moderate	10.105 \| good	16.083 \| good	9.03 \| good	0.6 \| good	17.709 \| good	0.342 \| good
2025-12-28T10:00:00.000Z	52 \| moderate	10 \| good	16.078 \| good	10.022 \| good	0.5 \| good	18.7 \| good	0.342 \| good
2025-12-28T11:00:00.000Z	49 \| good	9.404 \| good	14.102 \| good	10.019 \| good	0.6 \| good	15.8 \| good	0.342 \| good
2025-12-28T12:00:00.000Z	49 \| good	8.704 \| good	14.08 \| good	13.007 \| good	0.699 \| good	12.985 \| good	0.328 \| good
2025-12-28T13:00:00.000Z	49 \| good	8.703 \| good	14.088 \| good	8.03 \| good	0.699 \| good	13.072 \| good	0.409 \| good
2025-12-28T14:00:00.000Z	49 \| good	8.799 \| good	14.086 \| good	10.024 \| good	0.998 \| good	17.628 \| good	0.329 \| good
2025-12-28T15:00:00.000Z	38 \| good	7.004 \| good	14.045 \| good	20.995 \| good	2.095 \| good	11.505 \| good	0.278 \| good
2025-12-28T16:00:00.000Z	38 \| good	7.497 \| good	31.97 \| good	19.026 \| good	1.596 \| good	10.438 \| good	0.264 \| good
2025-12-28T17:00:00.000Z	52 \| moderate	8.39 \| good	56.867 \| fine	24.026 \| good	3.39 \| good	7.337 \| good	0.241 \| good
2025-12-28T18:00:00.000Z	50 \| good	7.989 \| good	53.868 \| good	24.037 \| good	1.995 \| good	5.533 \| good	0.227 \| good
2025-12-28T19:00:00.000Z	46 \| good	7.291 \| good	49.882 \| good	28.031 \| good	1.995 \| good	8.139 \| good	0.227 \| good
2025-12-28T20:00:00.000Z	34 \| good	5.996 \| good	36.934 \| good	33.02 \| good	0.6 \| good	9.814 \| good	0.277 \| good
2025-12-28T21:00:00.000Z	31 \| good	5.498 \| good	31.971 \| good	33.026 \| good	0.699 \| good	9.193 \| good	0.273 \| good
2025-12-28T22:00:00.000Z	33 \| good	5.499 \| good	31.966 \| good	36.007 \| good	0.699 \| good	14.915 \| good	0.287 \| good
2025-12-28T23:00:00.000Z	33 \| good	5.499 \| good	31.974 \| good	36.005 \| good	0.7 \| good	14.917 \| good	0.287 \| good
2025-12-29T00:00:00.000Z	49 \| good	9.39 \| good	42.034 \| good	18.784 \| good	1.332 \| good	17.103 \| good	0.282 \| good
2025-12-29T01:00:00.000Z	56 \| moderate	11.684 \| good	51.706 \| good	17.807 \| good	1.316 \| good	17.424 \| good	0.284 \| good
2025-12-29T02:00:00.000Z	60 \| moderate	13.707 \| fine	61.868 \| fine	15.979 \| good	1.299 \| good	17.744 \| good	0.285 \| good
2025-12-29T03:00:00.000Z	58 \| moderate	13.338 \| fine	60.278 \| fine	14.343 \| good	1.283 \| good	18.065 \| good	0.287 \| good
2025-12-29T04:00:00.000Z	60 \| moderate	13.651 \| fine	61.152 \| fine	18.825 \| good	1.364 \| good	18.222 \| good	0.28 \| good
2025-12-29T05:00:00.000Z	62 \| moderate	14.529 \| fine	65.099 \| fine	17.655 \| good	1.446 \| good	18.379 \| good	0.274 \| good
2025-12-29T06:00:00.000Z	66 \| moderate	17.021 \| fine	75.542 \| fine	13.393 \| good	1.528 \| good	18.536 \| good	0.267 \| good
2025-12-29T07:00:00.000Z	60 \| moderate	14.217 \| fine	63.963 \| fine	15.462 \| good	1.285 \| good	15.792 \| good	0.241 \| good
2025-12-29T08:00:00.000Z	49 \| good	8.847 \| good	39.215 \| good	25.431 \| good	1.043 \| good	13.047 \| good	0.215 \| good
2025-12-29T09:00:00.000Z	30 \| good	4.21 \| good	18.666 \| good	31.509 \| good	0.8 \| good	10.303 \| good	0.189 \| good
2025-12-29T10:00:00.000Z	31 \| good	2.637 \| good	10.954 \| good	32.575 \| good	0.635 \| good	7.95 \| good	0.177 \| good
2025-12-29T11:00:00.000Z	31 \| good	2.487 \| good	10.091 \| good	32.741 \| good	0.471 \| good	5.597 \| good	0.164 \| good
2025-12-29T12:00:00.000Z	31 \| good	2.108 \| good	8.477 \| good	32.635 \| good	0.306 \| good	3.243 \| good	0.151 \| good
2025-12-29T13:00:00.000Z	28 \| good	3.444 \| good	15.127 \| good	30.355 \| good	0.384 \| good	4.296 \| good	0.159 \| good
2025-12-29T14:00:00.000Z	27 \| good	4.817 \| good	21.122 \| good	25.081 \| good	0.463 \| good	5.348 \| good	0.167 \| good
2025-12-29T15:00:00.000Z	38 \| good	6.753 \| good	29.883 \| good	22.214 \| good	0.542 \| good	6.401 \| good	0.175 \| good
2025-12-29T16:00:00.000Z	38 \| good	7.214 \| good	31.977 \| good	18.837 \| good	0.637 \| good	7.462 \| good	0.183 \| good
2025-12-29T17:00:00.000Z	38 \| good	7.01 \| good	30.973 \| good	18.261 \| good	0.731 \| good	8.524 \| good	0.192 \| good
2025-12-29T18:00:00.000Z	38 \| good	6.938 \| good	30.809 \| good	16.583 \| good	0.826 \| good	9.586 \| good	0.201 \| good
2025-12-29T19:00:00.000Z	38 \| good	6.686 \| good	29.642 \| good	16.465 \| good	0.81 \| good	10.399 \| good	0.208 \| good
2025-12-29T20:00:00.000Z	38 \| good	6.612 \| good	29.528 \| good	17.676 \| good	0.795 \| good	11.213 \| good	0.215 \| good
2025-12-29T21:00:00.000Z	38 \| good	6.611 \| good	29.485 \| good	23.425 \| good	0.779 \| good	12.026 \| good	0.223 \| good
2025-12-29T22:00:00.000Z	38 \| good	6.703 \| good	29.51 \| good	22.411 \| good	0.893 \| good	11.457 \| good	0.22 \| good
2025-12-29T23:00:00.000Z	44 \| good	8.004 \| good	35.208 \| good	29.6 \| good	1.006 \| good	10.888 \| good	0.217 \| good
2025-12-30T00:00:00.000Z	38 \| good	7.315 \| good	32.126 \| good	32.179 \| good	1.119 \| good	10.318 \| good	0.214 \| good
2025-12-30T01:00:00.000Z	38 \| good	7.043 \| good	31.065 \| good	27.481 \| good	0.851 \| good	7.555 \| good	0.202 \| good
2025-12-30T02:00:00.000Z	33 \| good	6.389 \| good	28.62 \| good	24.409 \| good	0.584 \| good	4.793 \| good	0.191 \| good
2025-12-30T03:00:00.000Z	23 \| good	4.131 \| good	18.058 \| good	24.622 \| good	0.316 \| good	2.03 \| good	0.18 \| good
2025-12-30T04:00:00.000Z	22 \| good	3.484 \| good	15.117 \| good	24.442 \| good	0.303 \| good	1.796 \| good	0.17 \| good
2025-12-30T05:00:00.000Z	24 \| good	3.323 \| good	14.909 \| good	26.131 \| good	0.29 \| good	1.562 \| good	0.16 \| good
2025-12-30T06:00:00.000Z	26 \| good	2.511 \| good	10 \| good	27.682 \| good	0.278 \| good	1.327 \| good	0.15 \| good
2025-12-30T07:00:00.000Z	26 \| good	0.946 \| good	4 \| good	27.989 \| good	0.262 \| good	1.173 \| good	0.146 \| good
2025-12-30T08:00:00.000Z	26 \| good	0.422 \| good	1.866 \| good	28.019 \| good	0.245 \| good	1.018 \| good	0.142 \| good
2025-12-30T09:00:00.000Z	27 \| good	0.364 \| good	1.264 \| good	28.666 \| good	0.229 \| good	0.864 \| good	0.138 \| good
2025-12-30T10:00:00.000Z	25 \| good	0.345 \| good	1 \| good	27.247 \| good	0.197 \| good	0.826 \| good	0.137 \| good
2025-12-30T11:00:00.000Z	24 \| good	0.311 \| good	1 \| good	26.325 \| good	0.164 \| good	0.788 \| good	0.136 \| good
2025-12-30T12:00:00.000Z	25 \| good	0.262 \| good	0.977 \| good	27.032 \| good	0.132 \| good	0.751 \| good	0.135 \| good
2025-12-30T13:00:00.000Z	25 \| good	0.235 \| good	0.929 \| good	26.705 \| good	0.127 \| good	0.681 \| good	0.134 \| good
2025-12-30T14:00:00.000Z	25 \| good	0.2 \| good	0.388 \| good	26.741 \| good	0.121 \| good	0.61 \| good	0.134 \| good
2025-12-30T15:00:00.000Z	26 \| good	0.792 \| good	2.977 \| good	28.192 \| good	0.116 \| good	0.54 \| good	0.134 \| good
2025-12-30T16:00:00.000Z	27 \| good	0.94 \| good	3.897 \| good	28.855 \| good	0.115 \| good	0.517 \| good	0.133 \| good
2025-12-30T17:00:00.000Z	26 \| good	0.347 \| good	1.102 \| good	28.391 \| good	0.114 \| good	0.494 \| good	0.132 \| good
2025-12-30T18:00:00.000Z	26 \| good	0.173 \| good	0.182 \| good	28.378 \| good	0.113 \| good	0.471 \| good	0.131 \| good
2025-12-30T19:00:00.000Z	26 \| good	0.24 \| good	1 \| good	27.801 \| good	0.115 \| good	0.627 \| good	0.132 \| good
2025-12-30T20:00:00.000Z	26 \| good	0.256 \| good	0.977 \| good	28.12 \| good	0.118 \| good	0.782 \| good	0.132 \| good
2025-12-30T21:00:00.000Z	27 \| good	0.288 \| good	0.977 \| good	28.816 \| good	0.12 \| good	0.937 \| good	0.132 \| good
2025-12-30T22:00:00.000Z	25 \| good	1.068 \| good	4.218 \| good	26.627 \| good	0.131 \| good	1.015 \| good	0.132 \| good
2025-12-30T23:00:00.000Z	23 \| good	3.098 \| good	13.568 \| good	25.036 \| good	0.143 \| good	1.093 \| good	0.132 \| good

Portsmouth

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Portsmouth, New Hampshire air quality map: Stay updated on AQI near you

0.30ppm

How accurate is New Hampshire, USA air quality data?

Air quality and pollutant data for New Hampshire, 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 Portsmouth, New Hampshire?

The air quality information for Portsmouth, New Hampshire is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Portsmouth, New Hampshire at its worst?

In the past 24 hours, the air quality in Portsmouth, New Hampshire was at its worst at 02:00:00 on 2025-12-28.

When did Portsmouth, New Hampshire experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Portsmouth, New Hampshire was observed at 09:00:00 on 2025-12-28.

What is the AQI in Portsmouth, New Hampshire right now?

As of now, the AQI in Portsmouth, New Hampshire is 33, indicating Good conditions.

What is the most common type of pollution in Portsmouth, New Hampshire?

Portsmouth, New Hampshire air has the highest levels of O3.

What should I do in case of poor air quality in Portsmouth, New Hampshire?

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

What is the PM_2.5 level in Portsmouth, New Hampshire at the moment?

PM_2.5 levels in Portsmouth, New Hampshire are currently 5.499 μg/m³.

What is the PM₁₀ level in Portsmouth, New Hampshire at the moment?

The PM₁₀ concentration in Portsmouth, New Hampshire is 31.974 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Portsmouth, New Hampshire at the moment?

The current carbon monoxide (CO) concentration in Portsmouth, New Hampshire is 0.287 ppm.

What is the sulfur dioxide (SO₂) level in Portsmouth, New Hampshire at the moment?

Currently, Portsmouth, New Hampshire has a sulfur dioxide (SO₂) concentration of 0.7 ppb.

What is the ozone (O₃) level in Portsmouth, New Hampshire at the moment?

The current ozone (O₃) level in Portsmouth, New Hampshire at the moment is 36.005 ppm.

What is the nitrogen dioxide (NO₂) level in Portsmouth, New Hampshire at the moment?

Nitrogen dioxide (NO₂) level in Portsmouth, New Hampshire at the moment is 14.917 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	29 \| good	4.506 \| good	15.043 \| good	31.001 \| good	0.6 \| good	13.35 \| good	0.277 \| good
2025-12-27T01:00:00.000Z	27 \| good	4.907 \| good	16.045 \| good	28.003 \| good	0.799 \| good	7.689 \| good	0.318 \| good
2025-12-27T02:00:00.000Z	27 \| good	5.207 \| good	15.054 \| good	28.98 \| good	0.6 \| good	7.428 \| good	0.303 \| good
2025-12-27T03:00:00.000Z	33 \| good	5.608 \| good	14.054 \| good	27.989 \| good	0.6 \| good	8.099 \| good	0.303 \| good
2025-12-27T04:00:00.000Z	27 \| good	5.109 \| good	12.057 \| good	27.987 \| good	0.6 \| good	8.239 \| good	0.303 \| good
2025-12-27T05:00:00.000Z	28 \| good	4.111 \| good	9.061 \| good	29.982 \| good	0.6 \| good	8.482 \| good	0.231 \| good
2025-12-27T06:00:00.000Z	30 \| good	3.411 \| good	7.057 \| good	31.98 \| good	0.6 \| good	8.105 \| good	0.209 \| good
2025-12-27T07:00:00.000Z	31 \| good	3.411 \| good	7.055 \| good	33.981 \| good	0.6 \| good	7.081 \| good	0.209 \| good
2025-12-27T08:00:00.000Z	31 \| good	3.011 \| good	6.05 \| good	33.988 \| good	0.5 \| good	4.748 \| good	0.209 \| good
2025-12-27T09:00:00.000Z	31 \| good	2.805 \| good	6.041 \| good	33.995 \| good	0.5 \| good	5.676 \| good	0.186 \| good
2025-12-27T10:00:00.000Z	31 \| good	2.603 \| good	5.039 \| good	33.001 \| good	0.4 \| good	5.443 \| good	0.2 \| good
2025-12-27T11:00:00.000Z	31 \| good	2.402 \| good	4.026 \| good	32.999 \| good	0.5 \| good	3.335 \| good	0.186 \| good
2025-12-27T12:00:00.000Z	30 \| good	2.402 \| good	4.02 \| good	32.003 \| good	0.5 \| good	3.273 \| good	0.186 \| good
2025-12-27T13:00:00.000Z	31 \| good	2.301 \| good	4.025 \| good	34 \| good	0.5 \| good	3.173 \| good	0.2 \| good
2025-12-27T14:00:00.000Z	31 \| good	1.902 \| good	3.036 \| good	33.007 \| good	0.5 \| good	3.274 \| good	0.237 \| good
2025-12-27T15:00:00.000Z	32 \| good	2.102 \| good	3.026 \| good	34.999 \| good	0.5 \| good	4.342 \| good	0.251 \| good
2025-12-27T16:00:00.000Z	31 \| good	2.202 \| good	3.026 \| good	34 \| good	0.5 \| good	3.771 \| good	0.223 \| good
2025-12-27T17:00:00.000Z	31 \| good	2.401 \| good	4.024 \| good	34.002 \| good	0.699 \| good	2.896 \| good	0.237 \| good
2025-12-27T18:00:00.000Z	31 \| good	2.501 \| good	5.023 \| good	34.006 \| good	0.799 \| good	3.113 \| good	0.209 \| good
2025-12-27T19:00:00.000Z	31 \| good	2.7 \| good	6.011 \| good	34.01 \| good	0.699 \| good	4.67 \| good	0.209 \| good
2025-12-27T20:00:00.000Z	32 \| good	2.9 \| good	7.009 \| good	35.008 \| good	0.699 \| good	5.258 \| good	0.209 \| good
2025-12-27T21:00:00.000Z	32 \| good	3.199 \| good	9.007 \| good	35.008 \| good	0.799 \| good	3.533 \| good	0.246 \| good
2025-12-27T22:00:00.000Z	32 \| good	3.201 \| good	11.007 \| good	35.003 \| good	0.599 \| good	8.558 \| good	0.282 \| good
2025-12-27T23:00:00.000Z	33 \| good	4.5 \| good	18 \| good	35.993 \| good	0.599 \| good	6.475 \| good	0.291 \| good
2025-12-28T00:00:00.000Z	52 \| moderate	9.882 \| good	36.955 \| good	21.037 \| good	0.699 \| good	14.772 \| good	0.35 \| good
2025-12-28T01:00:00.000Z	58 \| moderate	13.273 \| fine	44.939 \| good	16.042 \| good	0.599 \| good	11.525 \| good	0.432 \| good
2025-12-28T02:00:00.000Z	58 \| moderate	13.275 \| fine	44.929 \| good	14.039 \| good	0.5 \| good	11.589 \| good	0.468 \| good
2025-12-28T03:00:00.000Z	49 \| good	8.885 \| good	39.213 \| good	21.416 \| good	0.516 \| good	8.664 \| good	0.238 \| good
2025-12-28T04:00:00.000Z	54 \| moderate	11.49 \| good	26.027 \| good	10.023 \| good	0.599 \| good	11.73 \| good	0.318 \| good
2025-12-28T05:00:00.000Z	52 \| moderate	10.493 \| good	21.038 \| good	10.022 \| good	0.5 \| good	14.148 \| good	0.318 \| good
2025-12-28T06:00:00.000Z	52 \| moderate	9.797 \| good	18.061 \| good	14.006 \| good	0.6 \| good	13.214 \| good	0.304 \| good
2025-12-28T07:00:00.000Z	52 \| moderate	9.801 \| good	18.102 \| good	7.037 \| good	0.6 \| good	15.282 \| good	0.304 \| good
2025-12-28T08:00:00.000Z	52 \| moderate	9.606 \| good	16.108 \| good	15.008 \| good	0.5 \| good	12.579 \| good	0.291 \| good
2025-12-28T09:00:00.000Z	52 \| moderate	10.105 \| good	16.083 \| good	9.03 \| good	0.6 \| good	17.709 \| good	0.342 \| good
2025-12-28T10:00:00.000Z	52 \| moderate	10 \| good	16.078 \| good	10.022 \| good	0.5 \| good	18.7 \| good	0.342 \| good
2025-12-28T11:00:00.000Z	49 \| good	9.404 \| good	14.102 \| good	10.019 \| good	0.6 \| good	15.8 \| good	0.342 \| good
2025-12-28T12:00:00.000Z	49 \| good	8.704 \| good	14.08 \| good	13.007 \| good	0.699 \| good	12.985 \| good	0.328 \| good
2025-12-28T13:00:00.000Z	49 \| good	8.703 \| good	14.088 \| good	8.03 \| good	0.699 \| good	13.072 \| good	0.409 \| good
2025-12-28T14:00:00.000Z	49 \| good	8.799 \| good	14.086 \| good	10.024 \| good	0.998 \| good	17.628 \| good	0.329 \| good
2025-12-28T15:00:00.000Z	38 \| good	7.004 \| good	14.045 \| good	20.995 \| good	2.095 \| good	11.505 \| good	0.278 \| good
2025-12-28T16:00:00.000Z	38 \| good	7.497 \| good	31.97 \| good	19.026 \| good	1.596 \| good	10.438 \| good	0.264 \| good
2025-12-28T17:00:00.000Z	52 \| moderate	8.39 \| good	56.867 \| fine	24.026 \| good	3.39 \| good	7.337 \| good	0.241 \| good
2025-12-28T18:00:00.000Z	50 \| good	7.989 \| good	53.868 \| good	24.037 \| good	1.995 \| good	5.533 \| good	0.227 \| good
2025-12-28T19:00:00.000Z	46 \| good	7.291 \| good	49.882 \| good	28.031 \| good	1.995 \| good	8.139 \| good	0.227 \| good
2025-12-28T20:00:00.000Z	34 \| good	5.996 \| good	36.934 \| good	33.02 \| good	0.6 \| good	9.814 \| good	0.277 \| good
2025-12-28T21:00:00.000Z	31 \| good	5.498 \| good	31.971 \| good	33.026 \| good	0.699 \| good	9.193 \| good	0.273 \| good
2025-12-28T22:00:00.000Z	33 \| good	5.499 \| good	31.966 \| good	36.007 \| good	0.699 \| good	14.915 \| good	0.287 \| good
2025-12-28T23:00:00.000Z	33 \| good	5.499 \| good	31.974 \| good	36.005 \| good	0.7 \| good	14.917 \| good	0.287 \| good
2025-12-29T00:00:00.000Z	49 \| good	9.39 \| good	42.034 \| good	18.784 \| good	1.332 \| good	17.103 \| good	0.282 \| good
2025-12-29T01:00:00.000Z	56 \| moderate	11.684 \| good	51.706 \| good	17.807 \| good	1.316 \| good	17.424 \| good	0.284 \| good
2025-12-29T02:00:00.000Z	60 \| moderate	13.707 \| fine	61.868 \| fine	15.979 \| good	1.299 \| good	17.744 \| good	0.285 \| good
2025-12-29T03:00:00.000Z	58 \| moderate	13.338 \| fine	60.278 \| fine	14.343 \| good	1.283 \| good	18.065 \| good	0.287 \| good
2025-12-29T04:00:00.000Z	60 \| moderate	13.651 \| fine	61.152 \| fine	18.825 \| good	1.364 \| good	18.222 \| good	0.28 \| good
2025-12-29T05:00:00.000Z	62 \| moderate	14.529 \| fine	65.099 \| fine	17.655 \| good	1.446 \| good	18.379 \| good	0.274 \| good
2025-12-29T06:00:00.000Z	66 \| moderate	17.021 \| fine	75.542 \| fine	13.393 \| good	1.528 \| good	18.536 \| good	0.267 \| good
2025-12-29T07:00:00.000Z	60 \| moderate	14.217 \| fine	63.963 \| fine	15.462 \| good	1.285 \| good	15.792 \| good	0.241 \| good
2025-12-29T08:00:00.000Z	49 \| good	8.847 \| good	39.215 \| good	25.431 \| good	1.043 \| good	13.047 \| good	0.215 \| good
2025-12-29T09:00:00.000Z	30 \| good	4.21 \| good	18.666 \| good	31.509 \| good	0.8 \| good	10.303 \| good	0.189 \| good
2025-12-29T10:00:00.000Z	31 \| good	2.637 \| good	10.954 \| good	32.575 \| good	0.635 \| good	7.95 \| good	0.177 \| good
2025-12-29T11:00:00.000Z	31 \| good	2.487 \| good	10.091 \| good	32.741 \| good	0.471 \| good	5.597 \| good	0.164 \| good
2025-12-29T12:00:00.000Z	31 \| good	2.108 \| good	8.477 \| good	32.635 \| good	0.306 \| good	3.243 \| good	0.151 \| good
2025-12-29T13:00:00.000Z	28 \| good	3.444 \| good	15.127 \| good	30.355 \| good	0.384 \| good	4.296 \| good	0.159 \| good
2025-12-29T14:00:00.000Z	27 \| good	4.817 \| good	21.122 \| good	25.081 \| good	0.463 \| good	5.348 \| good	0.167 \| good
2025-12-29T15:00:00.000Z	38 \| good	6.753 \| good	29.883 \| good	22.214 \| good	0.542 \| good	6.401 \| good	0.175 \| good
2025-12-29T16:00:00.000Z	38 \| good	7.214 \| good	31.977 \| good	18.837 \| good	0.637 \| good	7.462 \| good	0.183 \| good
2025-12-29T17:00:00.000Z	38 \| good	7.01 \| good	30.973 \| good	18.261 \| good	0.731 \| good	8.524 \| good	0.192 \| good
2025-12-29T18:00:00.000Z	38 \| good	6.938 \| good	30.809 \| good	16.583 \| good	0.826 \| good	9.586 \| good	0.201 \| good
2025-12-29T19:00:00.000Z	38 \| good	6.686 \| good	29.642 \| good	16.465 \| good	0.81 \| good	10.399 \| good	0.208 \| good
2025-12-29T20:00:00.000Z	38 \| good	6.612 \| good	29.528 \| good	17.676 \| good	0.795 \| good	11.213 \| good	0.215 \| good
2025-12-29T21:00:00.000Z	38 \| good	6.611 \| good	29.485 \| good	23.425 \| good	0.779 \| good	12.026 \| good	0.223 \| good
2025-12-29T22:00:00.000Z	38 \| good	6.703 \| good	29.51 \| good	22.411 \| good	0.893 \| good	11.457 \| good	0.22 \| good
2025-12-29T23:00:00.000Z	44 \| good	8.004 \| good	35.208 \| good	29.6 \| good	1.006 \| good	10.888 \| good	0.217 \| good
2025-12-30T00:00:00.000Z	38 \| good	7.315 \| good	32.126 \| good	32.179 \| good	1.119 \| good	10.318 \| good	0.214 \| good
2025-12-30T01:00:00.000Z	38 \| good	7.043 \| good	31.065 \| good	27.481 \| good	0.851 \| good	7.555 \| good	0.202 \| good
2025-12-30T02:00:00.000Z	33 \| good	6.389 \| good	28.62 \| good	24.409 \| good	0.584 \| good	4.793 \| good	0.191 \| good
2025-12-30T03:00:00.000Z	23 \| good	4.131 \| good	18.058 \| good	24.622 \| good	0.316 \| good	2.03 \| good	0.18 \| good
2025-12-30T04:00:00.000Z	22 \| good	3.484 \| good	15.117 \| good	24.442 \| good	0.303 \| good	1.796 \| good	0.17 \| good
2025-12-30T05:00:00.000Z	24 \| good	3.323 \| good	14.909 \| good	26.131 \| good	0.29 \| good	1.562 \| good	0.16 \| good
2025-12-30T06:00:00.000Z	26 \| good	2.511 \| good	10 \| good	27.682 \| good	0.278 \| good	1.327 \| good	0.15 \| good
2025-12-30T07:00:00.000Z	26 \| good	0.946 \| good	4 \| good	27.989 \| good	0.262 \| good	1.173 \| good	0.146 \| good
2025-12-30T08:00:00.000Z	26 \| good	0.422 \| good	1.866 \| good	28.019 \| good	0.245 \| good	1.018 \| good	0.142 \| good
2025-12-30T09:00:00.000Z	27 \| good	0.364 \| good	1.264 \| good	28.666 \| good	0.229 \| good	0.864 \| good	0.138 \| good
2025-12-30T10:00:00.000Z	25 \| good	0.345 \| good	1 \| good	27.247 \| good	0.197 \| good	0.826 \| good	0.137 \| good
2025-12-30T11:00:00.000Z	24 \| good	0.311 \| good	1 \| good	26.325 \| good	0.164 \| good	0.788 \| good	0.136 \| good
2025-12-30T12:00:00.000Z	25 \| good	0.262 \| good	0.977 \| good	27.032 \| good	0.132 \| good	0.751 \| good	0.135 \| good
2025-12-30T13:00:00.000Z	25 \| good	0.235 \| good	0.929 \| good	26.705 \| good	0.127 \| good	0.681 \| good	0.134 \| good
2025-12-30T14:00:00.000Z	25 \| good	0.2 \| good	0.388 \| good	26.741 \| good	0.121 \| good	0.61 \| good	0.134 \| good
2025-12-30T15:00:00.000Z	26 \| good	0.792 \| good	2.977 \| good	28.192 \| good	0.116 \| good	0.54 \| good	0.134 \| good
2025-12-30T16:00:00.000Z	27 \| good	0.94 \| good	3.897 \| good	28.855 \| good	0.115 \| good	0.517 \| good	0.133 \| good
2025-12-30T17:00:00.000Z	26 \| good	0.347 \| good	1.102 \| good	28.391 \| good	0.114 \| good	0.494 \| good	0.132 \| good
2025-12-30T18:00:00.000Z	26 \| good	0.173 \| good	0.182 \| good	28.378 \| good	0.113 \| good	0.471 \| good	0.131 \| good
2025-12-30T19:00:00.000Z	26 \| good	0.24 \| good	1 \| good	27.801 \| good	0.115 \| good	0.627 \| good	0.132 \| good
2025-12-30T20:00:00.000Z	26 \| good	0.256 \| good	0.977 \| good	28.12 \| good	0.118 \| good	0.782 \| good	0.132 \| good
2025-12-30T21:00:00.000Z	27 \| good	0.288 \| good	0.977 \| good	28.816 \| good	0.12 \| good	0.937 \| good	0.132 \| good
2025-12-30T22:00:00.000Z	25 \| good	1.068 \| good	4.218 \| good	26.627 \| good	0.131 \| good	1.015 \| good	0.132 \| good
2025-12-30T23:00:00.000Z	23 \| good	3.098 \| good	13.568 \| good	25.036 \| good	0.143 \| good	1.093 \| good	0.132 \| good

Live air quality index in Portsmouth, New Hampshire today

Major air pollutants in Portsmouth, New Hampshire

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Portsmouth, New Hampshire air quality map: Stay updated on AQI near you

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Kittery, Maine

York, Maine

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Dover, New Hampshire

Exeter, New Hampshire

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What is the nitrogen dioxide (NO2) level in Portsmouth, New Hampshire 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 Portsmouth, New Hampshire at the moment?

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What is the sulfur dioxide (SO₂) level in Portsmouth, New Hampshire at the moment?

What is the ozone (O₃) level in Portsmouth, New Hampshire at the moment?

What is the nitrogen dioxide (NO₂) level in Portsmouth, New Hampshire at the moment?