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 0.507 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 19.467 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 5.925 ppb.

Real-time air quality index in Portsmouth, New Hampshire today

Name: Live air pollution levels in Portsmouth, New Hampshire today
Creator: Ambee

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)

Moderate

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)

11.90 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

19.60 μg/m³

155

255

425

605+

Ozone (O₃)

19.47 ppb

201

201+

Sulfur Dioxide (SO₂)

0.51 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.92 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 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
2025-06-05T12:00:00.000Z	56 \| moderate	11.976 \| good	25.576 \| good	31.576 \| good	0.604 \| good	10.52 \| good	0.281 \| good
2025-06-05T13:00:00.000Z	58 \| moderate	13.2 \| fine	27.798 \| good	28.822 \| good	0.604 \| good	13.673 \| good	0.317 \| good
2025-06-05T14:00:00.000Z	60 \| moderate	14.35 \| fine	35.153 \| good	34.683 \| good	0.506 \| good	12.311 \| good	0.331 \| good
2025-06-05T15:00:00.000Z	62 \| moderate	15.054 \| fine	34.4 \| good	35.692 \| good	0.507 \| good	7.153 \| good	0.281 \| good
2025-06-05T16:00:00.000Z	64 \| moderate	15.645 \| fine	32.318 \| good	47.475 \| good	0.603 \| good	8.751 \| good	0.258 \| good
2025-06-05T17:00:00.000Z	71 \| moderate	16.867 \| fine	35.925 \| good	60.827 \| fine	0.605 \| good	7.695 \| good	0.281 \| good
2025-06-05T18:00:00.000Z	71 \| moderate	17.653 \| fine	35.78 \| good	60.849 \| fine	0.603 \| good	7.971 \| good	0.281 \| good
2025-06-05T19:00:00.000Z	77 \| moderate	17.469 \| fine	36.099 \| good	63.044 \| fine	0.604 \| good	5.185 \| good	0.232 \| good
2025-06-05T20:00:00.000Z	90 \| moderate	17.683 \| fine	34.091 \| good	67.451 \| fine	0.601 \| good	6.294 \| good	0.255 \| good
2025-06-05T21:00:00.000Z	108 \| sensitive	18.03 \| fine	35.371 \| good	72.852 \| moderate	0.603 \| good	7.831 \| good	0.255 \| good
2025-06-05T22:00:00.000Z	122 \| sensitive	17.711 \| fine	33.939 \| good	76.647 \| moderate	0.602 \| good	5.828 \| good	0.277 \| good
2025-06-05T23:00:00.000Z	108 \| sensitive	17.507 \| fine	34.203 \| good	73.002 \| moderate	0.504 \| good	5.277 \| good	0.277 \| good
2025-06-06T00:00:00.000Z	115 \| sensitive	17.515 \| fine	34.407 \| good	74.786 \| moderate	0.603 \| good	5.825 \| good	0.303 \| good
2025-06-06T01:00:00.000Z	100 \| moderate	18.07 \| fine	37.993 \| good	70.14 \| fine	0.505 \| good	5.817 \| good	0.303 \| good
2025-06-06T02:00:00.000Z	77 \| moderate	18.563 \| fine	37.561 \| good	63.22 \| fine	0.507 \| good	6.334 \| good	0.303 \| good
2025-06-06T03:00:00.000Z	69 \| moderate	18.747 \| fine	36.832 \| good	57.873 \| fine	0.507 \| good	14.948 \| good	0.317 \| good
2025-06-06T04:00:00.000Z	69 \| moderate	18.758 \| fine	34.047 \| good	57.841 \| fine	0.505 \| good	12.03 \| good	0.331 \| good
2025-06-06T05:00:00.000Z	69 \| moderate	19.44 \| fine	36.765 \| good	50.779 \| good	0.505 \| good	6.193 \| good	0.262 \| good
2025-06-06T06:00:00.000Z	73 \| moderate	20.535 \| fine	35.676 \| good	34.025 \| good	0.505 \| good	6.861 \| good	0.19 \| good
2025-06-06T07:00:00.000Z	75 \| moderate	21.92 \| fine	38.841 \| good	34.009 \| good	0.506 \| good	8.774 \| good	0.244 \| good
2025-06-06T08:00:00.000Z	77 \| moderate	22.596 \| fine	41.132 \| good	32.275 \| good	0.702 \| good	9.237 \| good	0.22 \| good
2025-06-06T09:00:00.000Z	75 \| moderate	22.305 \| fine	40.395 \| good	26.636 \| good	0.802 \| good	3.506 \| good	0.232 \| good
2025-06-06T10:00:00.000Z	73 \| moderate	20.607 \| fine	35.667 \| good	29.284 \| good	0.802 \| good	4.212 \| good	0.217 \| good
2025-06-06T11:00:00.000Z	67 \| moderate	17.718 \| fine	31.307 \| good	29.286 \| good	0.703 \| good	4.367 \| good	0.194 \| good
2025-06-06T12:00:00.000Z	62 \| moderate	14.592 \| fine	23.75 \| good	32.003 \| good	0.704 \| good	5.051 \| good	0.208 \| good
2025-06-06T13:00:00.000Z	60 \| moderate	13.882 \| fine	25.576 \| good	31.282 \| good	0.606 \| good	9.381 \| good	0.223 \| good
2025-06-06T14:00:00.000Z	58 \| moderate	12.981 \| fine	27.152 \| good	31.011 \| good	0.507 \| good	10.765 \| good	0.194 \| good
2025-06-06T15:00:00.000Z	54 \| moderate	11.363 \| good	22.571 \| good	33.997 \| good	0.605 \| good	5.626 \| good	0.194 \| good
2025-06-06T16:00:00.000Z	52 \| moderate	9.885 \| good	18.556 \| good	33.935 \| good	0.506 \| good	7.149 \| good	0.194 \| good
2025-06-06T17:00:00.000Z	49 \| good	9.297 \| good	18.076 \| good	35.008 \| good	0.505 \| good	4.66 \| good	0.172 \| good
2025-06-06T18:00:00.000Z	49 \| good	9.225 \| good	17.266 \| good	41.711 \| good	0.505 \| good	3.73 \| good	0.194 \| good
2025-06-06T19:00:00.000Z	52 \| moderate	10.036 \| good	18.194 \| good	38.922 \| good	0.502 \| good	6.415 \| good	0.238 \| good
2025-06-06T20:00:00.000Z	54 \| moderate	11.156 \| good	19.073 \| good	37.995 \| good	0.507 \| good	5.723 \| good	0.202 \| good
2025-06-06T21:00:00.000Z	56 \| moderate	12.037 \| good	20.687 \| good	33.203 \| good	0.509 \| good	4.448 \| good	0.25 \| good
2025-06-06T22:00:00.000Z	58 \| moderate	12.903 \| fine	20.255 \| good	32.005 \| good	0.507 \| good	8.067 \| good	0.224 \| good
2025-06-06T23:00:00.000Z	58 \| moderate	13.38 \| fine	21.208 \| good	32.646 \| good	0.41 \| good	6.93 \| good	0.202 \| good
2025-06-07T00:00:00.000Z	60 \| moderate	13.7 \| fine	21.665 \| good	30.914 \| good	0.408 \| good	6.46 \| good	0.224 \| good
2025-06-07T01:00:00.000Z	58 \| moderate	12.991 \| fine	21.14 \| good	25.864 \| good	0.408 \| good	8.467 \| good	0.272 \| good
2025-06-07T02:00:00.000Z	54 \| moderate	11.377 \| good	20.114 \| good	29.652 \| good	0.309 \| good	8.746 \| good	0.282 \| good
2025-06-07T03:00:00.000Z	54 \| moderate	11.161 \| good	19.139 \| good	18.957 \| good	0.31 \| good	4.379 \| good	0.233 \| good
2025-06-07T04:00:00.000Z	58 \| moderate	12.637 \| fine	20.714 \| good	18.953 \| good	0.408 \| good	9.827 \| good	0.22 \| good
2025-06-07T05:00:00.000Z	60 \| moderate	14.212 \| fine	22.25 \| good	27.655 \| good	0.409 \| good	4.688 \| good	0.148 \| good
2025-06-07T06:00:00.000Z	58 \| moderate	13.115 \| fine	21.222 \| good	23.016 \| good	0.31 \| good	5.255 \| good	0.148 \| good
2025-06-07T07:00:00.000Z	56 \| moderate	12.203 \| fine	19.874 \| good	25.442 \| good	0.308 \| good	5.148 \| good	0.203 \| good
2025-06-07T08:00:00.000Z	56 \| moderate	12.34 \| fine	20.574 \| good	21.734 \| good	0.408 \| good	5.361 \| good	0.203 \| good
2025-06-07T09:00:00.000Z	56 \| moderate	11.901 \| good	19.602 \| good	19.467 \| good	0.507 \| good	5.925 \| good	0.216 \| good
2025-06-07T10:00:00.000Z	58 \| moderate	12.533 \| fine	22.467 \| good	14.677 \| good	0.409 \| good	7.653 \| good	0.172 \| good
2025-06-07T10:00:00.000Z	56 \| moderate	11.901 \| good	19.602 \| good	19.467 \| good	0.507 \| good	5.925 \| good	0.216 \| good
2025-06-07T11:00:00.000Z	44 \| good	7.609 \| good	33.858 \| good	24.145 \| good	0.204 \| good	3.897 \| good	0.216 \| good
2025-06-07T12:00:00.000Z	38 \| good	7.23 \| good	31.982 \| good	25.445 \| good	0.196 \| good	4.173 \| good	0.213 \| good
2025-06-07T13:00:00.000Z	38 \| good	7.208 \| good	32.005 \| good	28.935 \| good	0.176 \| good	3.289 \| good	0.187 \| good
2025-06-07T14:00:00.000Z	44 \| good	8.144 \| good	35.968 \| good	33.55 \| good	0.157 \| good	3.606 \| good	0.188 \| good
2025-06-07T15:00:00.000Z	49 \| good	9.161 \| good	40.928 \| good	32.683 \| good	0.139 \| good	3.923 \| good	0.189 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	10.705 \| good	47.715 \| good	35.608 \| good	0.249 \| good	2.34 \| good	0.17 \| good
2025-06-07T17:00:00.000Z	54 \| moderate	11.184 \| good	49.762 \| good	38.372 \| good	0.203 \| good	2.446 \| good	0.169 \| good
2025-06-07T18:00:00.000Z	49 \| good	8.681 \| good	38.332 \| good	44.724 \| good	0.157 \| good	2.553 \| good	0.168 \| good
2025-06-07T19:00:00.000Z	45 \| good	8.372 \| good	36.465 \| good	48.658 \| good	0.306 \| good	2.709 \| good	0.171 \| good
2025-06-07T20:00:00.000Z	48 \| good	7.693 \| good	34.165 \| good	51.91 \| good	0.247 \| good	2.874 \| good	0.168 \| good
2025-06-07T21:00:00.000Z	46 \| good	7.174 \| good	32.174 \| good	49.553 \| good	0.188 \| good	3.039 \| good	0.165 \| good
2025-06-07T22:00:00.000Z	41 \| good	6.903 \| good	30.379 \| good	43.692 \| good	0.215 \| good	5.567 \| good	0.207 \| good
2025-06-07T23:00:00.000Z	41 \| good	7.045 \| good	31.211 \| good	43.521 \| good	0.183 \| good	6.008 \| good	0.203 \| good
2025-06-08T00:00:00.000Z	38 \| good	6.617 \| good	29.121 \| good	32.46 \| good	0.15 \| good	6.449 \| good	0.199 \| good
2025-06-08T01:00:00.000Z	38 \| good	6.524 \| good	29.026 \| good	26.621 \| good	0.196 \| good	4.222 \| good	0.208 \| good
2025-06-08T02:00:00.000Z	49 \| good	8.919 \| good	39.101 \| good	25.571 \| good	0.198 \| good	4.237 \| good	0.201 \| good
2025-06-08T03:00:00.000Z	49 \| good	9.424 \| good	42.074 \| good	26.093 \| good	0.201 \| good	4.251 \| good	0.193 \| good
2025-06-08T04:00:00.000Z	49 \| good	9.284 \| good	41.081 \| good	21.849 \| good	0.247 \| good	4.869 \| good	0.234 \| good
2025-06-08T05:00:00.000Z	49 \| good	9.022 \| good	39.397 \| good	22.956 \| good	0.27 \| good	4.705 \| good	0.224 \| good
2025-06-08T06:00:00.000Z	54 \| moderate	10.764 \| good	48.111 \| good	20.735 \| good	0.292 \| good	4.54 \| good	0.214 \| good
2025-06-08T07:00:00.000Z	60 \| moderate	13.703 \| fine	61.005 \| fine	17.619 \| good	0.191 \| good	2.991 \| good	0.251 \| good
2025-06-08T08:00:00.000Z	60 \| moderate	14.171 \| fine	63 \| fine	15.95 \| good	0.208 \| good	2.972 \| good	0.242 \| good
2025-06-08T09:00:00.000Z	60 \| moderate	14.189 \| fine	63.066 \| fine	15.577 \| good	0.226 \| good	2.954 \| good	0.234 \| good
2025-06-08T10:00:00.000Z	58 \| moderate	13.322 \| fine	60.783 \| fine	15.613 \| good	0.223 \| good	2.063 \| good	0.268 \| good
2025-06-08T11:00:00.000Z	56 \| moderate	12.35 \| fine	55.235 \| fine	17.824 \| good	0.239 \| good	2.199 \| good	0.264 \| good
2025-06-08T12:00:00.000Z	54 \| moderate	11.088 \| good	48.587 \| good	20.234 \| good	0.255 \| good	2.335 \| good	0.26 \| good
2025-06-08T13:00:00.000Z	52 \| moderate	9.888 \| good	43.598 \| good	26.592 \| good	0.206 \| good	1.039 \| good	0.27 \| good
2025-06-08T14:00:00.000Z	52 \| moderate	10.333 \| good	45.514 \| good	31.993 \| good	0.212 \| good	1.173 \| good	0.271 \| good
2025-06-08T15:00:00.000Z	54 \| moderate	10.695 \| good	47.374 \| good	32.266 \| good	0.217 \| good	1.306 \| good	0.273 \| good
2025-06-08T16:00:00.000Z	54 \| moderate	11.451 \| good	51.094 \| good	33.264 \| good	0.128 \| good	0.7 \| good	0.26 \| good
2025-06-08T17:00:00.000Z	52 \| moderate	10.257 \| good	45.169 \| good	32.385 \| good	0.133 \| good	0.775 \| good	0.264 \| good
2025-06-08T18:00:00.000Z	49 \| good	8.505 \| good	37.318 \| good	34.374 \| good	0.138 \| good	0.85 \| good	0.269 \| good
2025-06-08T19:00:00.000Z	49 \| good	9.25 \| good	41.185 \| good	34.484 \| good	0.136 \| good	1.171 \| good	0.256 \| good
2025-06-08T20:00:00.000Z	54 \| moderate	11.15 \| good	49.031 \| good	37.354 \| good	0.125 \| good	1.309 \| good	0.261 \| good
2025-06-08T21:00:00.000Z	52 \| moderate	9.636 \| good	43.086 \| good	40.985 \| good	0.113 \| good	1.447 \| good	0.265 \| good
2025-06-08T22:00:00.000Z	54 \| moderate	10.95 \| good	48.137 \| good	43.092 \| good	0.201 \| good	4.241 \| good	0.283 \| good
2025-06-08T23:00:00.000Z	62 \| moderate	15.165 \| fine	68.623 \| fine	38.224 \| good	0.18 \| good	4.545 \| good	0.287 \| good
2025-06-09T00:00:00.000Z	58 \| moderate	12.605 \| fine	56.998 \| fine	36.987 \| good	0.158 \| good	4.849 \| good	0.292 \| good
2025-06-09T01:00:00.000Z	52 \| moderate	9.686 \| good	43.159 \| good	35.346 \| good	0.302 \| good	5.99 \| good	0.305 \| good
2025-06-09T02:00:00.000Z	44 \| good	7.554 \| good	33.406 \| good	35.211 \| good	0.277 \| good	5.905 \| good	0.304 \| good
2025-06-09T03:00:00.000Z	33 \| good	6.177 \| good	27.39 \| good	33.289 \| good	0.252 \| good	5.819 \| good	0.304 \| good
2025-06-09T04:00:00.000Z	33 \| good	6.197 \| good	27.314 \| good	27.639 \| good	0.241 \| good	4.03 \| good	0.292 \| good
2025-06-09T05:00:00.000Z	33 \| good	6.431 \| good	28.348 \| good	28.829 \| good	0.23 \| good	3.728 \| good	0.287 \| good
2025-06-09T06:00:00.000Z	66 \| moderate	16.629 \| fine	17.744 \| good	34.553 \| good	0.219 \| good	3.426 \| good	0.281 \| good
2025-06-09T07:00:00.000Z	38 \| good	7.28 \| good	32.147 \| good	32.903 \| good	0.257 \| good	2.367 \| good	0.276 \| good
2025-06-09T08:00:00.000Z	38 \| good	7.05 \| good	31.154 \| good	32.455 \| good	0.262 \| good	2.226 \| good	0.272 \| good
2025-06-09T09:00:00.000Z	33 \| good	5.654 \| good	24.246 \| good	32.249 \| good	0.267 \| good	2.085 \| good	0.268 \| good
2025-06-09T10:00:00.000Z	38 \| good	6.504 \| good	29.115 \| good	35.947 \| good	0.273 \| good	1.388 \| good	0.251 \| good

Portsmouth

Get reliable air quality data to drive your business

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

0.21ppm

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 10:00:00 on 2025-06-06.

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 06:00:00 on 2025-06-06.

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

As of now, the AQI in Portsmouth, New Hampshire is 56, indicating Moderate conditions.

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

Portsmouth, New Hampshire air has the highest levels of PM2.5.

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 11.901 μg/m³.

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

The PM₁₀ concentration in Portsmouth, New Hampshire is 19.602 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 0.216 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 0.507 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 19.467 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 5.925 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-06-05T12:00:00.000Z	56 \| moderate	11.976 \| good	25.576 \| good	31.576 \| good	0.604 \| good	10.52 \| good	0.281 \| good
2025-06-05T13:00:00.000Z	58 \| moderate	13.2 \| fine	27.798 \| good	28.822 \| good	0.604 \| good	13.673 \| good	0.317 \| good
2025-06-05T14:00:00.000Z	60 \| moderate	14.35 \| fine	35.153 \| good	34.683 \| good	0.506 \| good	12.311 \| good	0.331 \| good
2025-06-05T15:00:00.000Z	62 \| moderate	15.054 \| fine	34.4 \| good	35.692 \| good	0.507 \| good	7.153 \| good	0.281 \| good
2025-06-05T16:00:00.000Z	64 \| moderate	15.645 \| fine	32.318 \| good	47.475 \| good	0.603 \| good	8.751 \| good	0.258 \| good
2025-06-05T17:00:00.000Z	71 \| moderate	16.867 \| fine	35.925 \| good	60.827 \| fine	0.605 \| good	7.695 \| good	0.281 \| good
2025-06-05T18:00:00.000Z	71 \| moderate	17.653 \| fine	35.78 \| good	60.849 \| fine	0.603 \| good	7.971 \| good	0.281 \| good
2025-06-05T19:00:00.000Z	77 \| moderate	17.469 \| fine	36.099 \| good	63.044 \| fine	0.604 \| good	5.185 \| good	0.232 \| good
2025-06-05T20:00:00.000Z	90 \| moderate	17.683 \| fine	34.091 \| good	67.451 \| fine	0.601 \| good	6.294 \| good	0.255 \| good
2025-06-05T21:00:00.000Z	108 \| sensitive	18.03 \| fine	35.371 \| good	72.852 \| moderate	0.603 \| good	7.831 \| good	0.255 \| good
2025-06-05T22:00:00.000Z	122 \| sensitive	17.711 \| fine	33.939 \| good	76.647 \| moderate	0.602 \| good	5.828 \| good	0.277 \| good
2025-06-05T23:00:00.000Z	108 \| sensitive	17.507 \| fine	34.203 \| good	73.002 \| moderate	0.504 \| good	5.277 \| good	0.277 \| good
2025-06-06T00:00:00.000Z	115 \| sensitive	17.515 \| fine	34.407 \| good	74.786 \| moderate	0.603 \| good	5.825 \| good	0.303 \| good
2025-06-06T01:00:00.000Z	100 \| moderate	18.07 \| fine	37.993 \| good	70.14 \| fine	0.505 \| good	5.817 \| good	0.303 \| good
2025-06-06T02:00:00.000Z	77 \| moderate	18.563 \| fine	37.561 \| good	63.22 \| fine	0.507 \| good	6.334 \| good	0.303 \| good
2025-06-06T03:00:00.000Z	69 \| moderate	18.747 \| fine	36.832 \| good	57.873 \| fine	0.507 \| good	14.948 \| good	0.317 \| good
2025-06-06T04:00:00.000Z	69 \| moderate	18.758 \| fine	34.047 \| good	57.841 \| fine	0.505 \| good	12.03 \| good	0.331 \| good
2025-06-06T05:00:00.000Z	69 \| moderate	19.44 \| fine	36.765 \| good	50.779 \| good	0.505 \| good	6.193 \| good	0.262 \| good
2025-06-06T06:00:00.000Z	73 \| moderate	20.535 \| fine	35.676 \| good	34.025 \| good	0.505 \| good	6.861 \| good	0.19 \| good
2025-06-06T07:00:00.000Z	75 \| moderate	21.92 \| fine	38.841 \| good	34.009 \| good	0.506 \| good	8.774 \| good	0.244 \| good
2025-06-06T08:00:00.000Z	77 \| moderate	22.596 \| fine	41.132 \| good	32.275 \| good	0.702 \| good	9.237 \| good	0.22 \| good
2025-06-06T09:00:00.000Z	75 \| moderate	22.305 \| fine	40.395 \| good	26.636 \| good	0.802 \| good	3.506 \| good	0.232 \| good
2025-06-06T10:00:00.000Z	73 \| moderate	20.607 \| fine	35.667 \| good	29.284 \| good	0.802 \| good	4.212 \| good	0.217 \| good
2025-06-06T11:00:00.000Z	67 \| moderate	17.718 \| fine	31.307 \| good	29.286 \| good	0.703 \| good	4.367 \| good	0.194 \| good
2025-06-06T12:00:00.000Z	62 \| moderate	14.592 \| fine	23.75 \| good	32.003 \| good	0.704 \| good	5.051 \| good	0.208 \| good
2025-06-06T13:00:00.000Z	60 \| moderate	13.882 \| fine	25.576 \| good	31.282 \| good	0.606 \| good	9.381 \| good	0.223 \| good
2025-06-06T14:00:00.000Z	58 \| moderate	12.981 \| fine	27.152 \| good	31.011 \| good	0.507 \| good	10.765 \| good	0.194 \| good
2025-06-06T15:00:00.000Z	54 \| moderate	11.363 \| good	22.571 \| good	33.997 \| good	0.605 \| good	5.626 \| good	0.194 \| good
2025-06-06T16:00:00.000Z	52 \| moderate	9.885 \| good	18.556 \| good	33.935 \| good	0.506 \| good	7.149 \| good	0.194 \| good
2025-06-06T17:00:00.000Z	49 \| good	9.297 \| good	18.076 \| good	35.008 \| good	0.505 \| good	4.66 \| good	0.172 \| good
2025-06-06T18:00:00.000Z	49 \| good	9.225 \| good	17.266 \| good	41.711 \| good	0.505 \| good	3.73 \| good	0.194 \| good
2025-06-06T19:00:00.000Z	52 \| moderate	10.036 \| good	18.194 \| good	38.922 \| good	0.502 \| good	6.415 \| good	0.238 \| good
2025-06-06T20:00:00.000Z	54 \| moderate	11.156 \| good	19.073 \| good	37.995 \| good	0.507 \| good	5.723 \| good	0.202 \| good
2025-06-06T21:00:00.000Z	56 \| moderate	12.037 \| good	20.687 \| good	33.203 \| good	0.509 \| good	4.448 \| good	0.25 \| good
2025-06-06T22:00:00.000Z	58 \| moderate	12.903 \| fine	20.255 \| good	32.005 \| good	0.507 \| good	8.067 \| good	0.224 \| good
2025-06-06T23:00:00.000Z	58 \| moderate	13.38 \| fine	21.208 \| good	32.646 \| good	0.41 \| good	6.93 \| good	0.202 \| good
2025-06-07T00:00:00.000Z	60 \| moderate	13.7 \| fine	21.665 \| good	30.914 \| good	0.408 \| good	6.46 \| good	0.224 \| good
2025-06-07T01:00:00.000Z	58 \| moderate	12.991 \| fine	21.14 \| good	25.864 \| good	0.408 \| good	8.467 \| good	0.272 \| good
2025-06-07T02:00:00.000Z	54 \| moderate	11.377 \| good	20.114 \| good	29.652 \| good	0.309 \| good	8.746 \| good	0.282 \| good
2025-06-07T03:00:00.000Z	54 \| moderate	11.161 \| good	19.139 \| good	18.957 \| good	0.31 \| good	4.379 \| good	0.233 \| good
2025-06-07T04:00:00.000Z	58 \| moderate	12.637 \| fine	20.714 \| good	18.953 \| good	0.408 \| good	9.827 \| good	0.22 \| good
2025-06-07T05:00:00.000Z	60 \| moderate	14.212 \| fine	22.25 \| good	27.655 \| good	0.409 \| good	4.688 \| good	0.148 \| good
2025-06-07T06:00:00.000Z	58 \| moderate	13.115 \| fine	21.222 \| good	23.016 \| good	0.31 \| good	5.255 \| good	0.148 \| good
2025-06-07T07:00:00.000Z	56 \| moderate	12.203 \| fine	19.874 \| good	25.442 \| good	0.308 \| good	5.148 \| good	0.203 \| good
2025-06-07T08:00:00.000Z	56 \| moderate	12.34 \| fine	20.574 \| good	21.734 \| good	0.408 \| good	5.361 \| good	0.203 \| good
2025-06-07T09:00:00.000Z	56 \| moderate	11.901 \| good	19.602 \| good	19.467 \| good	0.507 \| good	5.925 \| good	0.216 \| good
2025-06-07T10:00:00.000Z	58 \| moderate	12.533 \| fine	22.467 \| good	14.677 \| good	0.409 \| good	7.653 \| good	0.172 \| good
2025-06-07T10:00:00.000Z	56 \| moderate	11.901 \| good	19.602 \| good	19.467 \| good	0.507 \| good	5.925 \| good	0.216 \| good
2025-06-07T11:00:00.000Z	44 \| good	7.609 \| good	33.858 \| good	24.145 \| good	0.204 \| good	3.897 \| good	0.216 \| good
2025-06-07T12:00:00.000Z	38 \| good	7.23 \| good	31.982 \| good	25.445 \| good	0.196 \| good	4.173 \| good	0.213 \| good
2025-06-07T13:00:00.000Z	38 \| good	7.208 \| good	32.005 \| good	28.935 \| good	0.176 \| good	3.289 \| good	0.187 \| good
2025-06-07T14:00:00.000Z	44 \| good	8.144 \| good	35.968 \| good	33.55 \| good	0.157 \| good	3.606 \| good	0.188 \| good
2025-06-07T15:00:00.000Z	49 \| good	9.161 \| good	40.928 \| good	32.683 \| good	0.139 \| good	3.923 \| good	0.189 \| good
2025-06-07T16:00:00.000Z	54 \| moderate	10.705 \| good	47.715 \| good	35.608 \| good	0.249 \| good	2.34 \| good	0.17 \| good
2025-06-07T17:00:00.000Z	54 \| moderate	11.184 \| good	49.762 \| good	38.372 \| good	0.203 \| good	2.446 \| good	0.169 \| good
2025-06-07T18:00:00.000Z	49 \| good	8.681 \| good	38.332 \| good	44.724 \| good	0.157 \| good	2.553 \| good	0.168 \| good
2025-06-07T19:00:00.000Z	45 \| good	8.372 \| good	36.465 \| good	48.658 \| good	0.306 \| good	2.709 \| good	0.171 \| good
2025-06-07T20:00:00.000Z	48 \| good	7.693 \| good	34.165 \| good	51.91 \| good	0.247 \| good	2.874 \| good	0.168 \| good
2025-06-07T21:00:00.000Z	46 \| good	7.174 \| good	32.174 \| good	49.553 \| good	0.188 \| good	3.039 \| good	0.165 \| good
2025-06-07T22:00:00.000Z	41 \| good	6.903 \| good	30.379 \| good	43.692 \| good	0.215 \| good	5.567 \| good	0.207 \| good
2025-06-07T23:00:00.000Z	41 \| good	7.045 \| good	31.211 \| good	43.521 \| good	0.183 \| good	6.008 \| good	0.203 \| good
2025-06-08T00:00:00.000Z	38 \| good	6.617 \| good	29.121 \| good	32.46 \| good	0.15 \| good	6.449 \| good	0.199 \| good
2025-06-08T01:00:00.000Z	38 \| good	6.524 \| good	29.026 \| good	26.621 \| good	0.196 \| good	4.222 \| good	0.208 \| good
2025-06-08T02:00:00.000Z	49 \| good	8.919 \| good	39.101 \| good	25.571 \| good	0.198 \| good	4.237 \| good	0.201 \| good
2025-06-08T03:00:00.000Z	49 \| good	9.424 \| good	42.074 \| good	26.093 \| good	0.201 \| good	4.251 \| good	0.193 \| good
2025-06-08T04:00:00.000Z	49 \| good	9.284 \| good	41.081 \| good	21.849 \| good	0.247 \| good	4.869 \| good	0.234 \| good
2025-06-08T05:00:00.000Z	49 \| good	9.022 \| good	39.397 \| good	22.956 \| good	0.27 \| good	4.705 \| good	0.224 \| good
2025-06-08T06:00:00.000Z	54 \| moderate	10.764 \| good	48.111 \| good	20.735 \| good	0.292 \| good	4.54 \| good	0.214 \| good
2025-06-08T07:00:00.000Z	60 \| moderate	13.703 \| fine	61.005 \| fine	17.619 \| good	0.191 \| good	2.991 \| good	0.251 \| good
2025-06-08T08:00:00.000Z	60 \| moderate	14.171 \| fine	63 \| fine	15.95 \| good	0.208 \| good	2.972 \| good	0.242 \| good
2025-06-08T09:00:00.000Z	60 \| moderate	14.189 \| fine	63.066 \| fine	15.577 \| good	0.226 \| good	2.954 \| good	0.234 \| good
2025-06-08T10:00:00.000Z	58 \| moderate	13.322 \| fine	60.783 \| fine	15.613 \| good	0.223 \| good	2.063 \| good	0.268 \| good
2025-06-08T11:00:00.000Z	56 \| moderate	12.35 \| fine	55.235 \| fine	17.824 \| good	0.239 \| good	2.199 \| good	0.264 \| good
2025-06-08T12:00:00.000Z	54 \| moderate	11.088 \| good	48.587 \| good	20.234 \| good	0.255 \| good	2.335 \| good	0.26 \| good
2025-06-08T13:00:00.000Z	52 \| moderate	9.888 \| good	43.598 \| good	26.592 \| good	0.206 \| good	1.039 \| good	0.27 \| good
2025-06-08T14:00:00.000Z	52 \| moderate	10.333 \| good	45.514 \| good	31.993 \| good	0.212 \| good	1.173 \| good	0.271 \| good
2025-06-08T15:00:00.000Z	54 \| moderate	10.695 \| good	47.374 \| good	32.266 \| good	0.217 \| good	1.306 \| good	0.273 \| good
2025-06-08T16:00:00.000Z	54 \| moderate	11.451 \| good	51.094 \| good	33.264 \| good	0.128 \| good	0.7 \| good	0.26 \| good
2025-06-08T17:00:00.000Z	52 \| moderate	10.257 \| good	45.169 \| good	32.385 \| good	0.133 \| good	0.775 \| good	0.264 \| good
2025-06-08T18:00:00.000Z	49 \| good	8.505 \| good	37.318 \| good	34.374 \| good	0.138 \| good	0.85 \| good	0.269 \| good
2025-06-08T19:00:00.000Z	49 \| good	9.25 \| good	41.185 \| good	34.484 \| good	0.136 \| good	1.171 \| good	0.256 \| good
2025-06-08T20:00:00.000Z	54 \| moderate	11.15 \| good	49.031 \| good	37.354 \| good	0.125 \| good	1.309 \| good	0.261 \| good
2025-06-08T21:00:00.000Z	52 \| moderate	9.636 \| good	43.086 \| good	40.985 \| good	0.113 \| good	1.447 \| good	0.265 \| good
2025-06-08T22:00:00.000Z	54 \| moderate	10.95 \| good	48.137 \| good	43.092 \| good	0.201 \| good	4.241 \| good	0.283 \| good
2025-06-08T23:00:00.000Z	62 \| moderate	15.165 \| fine	68.623 \| fine	38.224 \| good	0.18 \| good	4.545 \| good	0.287 \| good
2025-06-09T00:00:00.000Z	58 \| moderate	12.605 \| fine	56.998 \| fine	36.987 \| good	0.158 \| good	4.849 \| good	0.292 \| good
2025-06-09T01:00:00.000Z	52 \| moderate	9.686 \| good	43.159 \| good	35.346 \| good	0.302 \| good	5.99 \| good	0.305 \| good
2025-06-09T02:00:00.000Z	44 \| good	7.554 \| good	33.406 \| good	35.211 \| good	0.277 \| good	5.905 \| good	0.304 \| good
2025-06-09T03:00:00.000Z	33 \| good	6.177 \| good	27.39 \| good	33.289 \| good	0.252 \| good	5.819 \| good	0.304 \| good
2025-06-09T04:00:00.000Z	33 \| good	6.197 \| good	27.314 \| good	27.639 \| good	0.241 \| good	4.03 \| good	0.292 \| good
2025-06-09T05:00:00.000Z	33 \| good	6.431 \| good	28.348 \| good	28.829 \| good	0.23 \| good	3.728 \| good	0.287 \| good
2025-06-09T06:00:00.000Z	66 \| moderate	16.629 \| fine	17.744 \| good	34.553 \| good	0.219 \| good	3.426 \| good	0.281 \| good
2025-06-09T07:00:00.000Z	38 \| good	7.28 \| good	32.147 \| good	32.903 \| good	0.257 \| good	2.367 \| good	0.276 \| good
2025-06-09T08:00:00.000Z	38 \| good	7.05 \| good	31.154 \| good	32.455 \| good	0.262 \| good	2.226 \| good	0.272 \| good
2025-06-09T09:00:00.000Z	33 \| good	5.654 \| good	24.246 \| good	32.249 \| good	0.267 \| good	2.085 \| good	0.268 \| good
2025-06-09T10:00:00.000Z	38 \| good	6.504 \| good	29.115 \| good	35.947 \| good	0.273 \| good	1.388 \| good	0.251 \| good

Real-time 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)

Track live Portsmouth, New Hampshire air quality forecast and history

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

Air quality in nearby cities

Kittery, Maine

York, Maine

Durham, New Hampshire

Hampton, New Hampshire

Dover, New Hampshire

Exeter, New Hampshire

How accurate is New Hampshire, USA air quality data?

Air quality levels in US

Frequently asked questions

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

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

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

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?

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?

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

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?