Air quality in New Hampshire
Air quality index (AQI⁺) and PM2.5 air pollution in New Hampshire • 12:30, Oct 23
Live most polluted city ranking
Real-time New Hampshire most polluted city ranking
Wildfires in New Hampshire
Real-time information
Active fires
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Learn more about global air quality
Which is the most polluted city in New Hampshire?
- Londonderry32
- Peterborough32
- Pittsburg32
- Portsmouth30
- Manchester27
- Pembroke27
- Randolph26
- Nashua25
- Woodstock25
- Dover24
- Keene24
- New Hampton24
- Sutton24
- Bow23
- Canterbury23
- Center Harbor23
- Grafton County23
- Newton23
- Brookline22
- Campton22
- Chesterfield21
- Sandwich21
- Barnstead20
- Hampton Falls20
- Northumberland20
- Pelham20
- Conway19
- Meredith19
- Hanover16
- Laconia16
- Hillsborough14
- Berlin12
- Colebrook12
- Dummer12
- Gorham12
- Greens12
- Groveton12
- Jefferson12
- Lancaster12
- Littleton12
- Milan12
- Stratford12
- Whitefield12
- Bethlehem11
- Gilford11
- Alexandria9
- Allenstown9
- Alton9
- Amherst9
- Andover9
- Antrim9
- Ashland9
- Auburn9
- Belknap9
- Belmont9
- Bennington9
- Blodgett Landing9
- Boscawen9
- Bradford9
- Bristol9
- Candia9
- Carroll9
- Charlestown9
- Cheshire9
- Chester9
- Chichester9
- Claremont9
- Concord9
- Contoocook9
- Danbury9
- Deering9
- Derry9
- Dublin9
- Dunbarton9
- East Merrimack9
- Enfield9
- Epsom9
- Farmington9
- Fitzwilliam9
- Francestown9
- Franconia9
- Franklin9
- Freedom9
- Gilmanton9
- Goffstown9
- Grantham9
- Greenville9
- Harrisville9
- Haverhill9
- Henniker9
- Hill9
- Hinsdale9
- Holderness9
- Hollis9
- Hopkinton9
- Hudson9
- Jaffrey9
- Klondike Corner9
- Lebanon9
- Lempster9
- Lincoln9
- Litchfield9
- Loudon9
- Lyme9
- Lyndeborough9
- Madison9
- Marlborough9
- Mason9
- Merrimack9
- Milford9
- Milton9
- Moultonborough9
- New Boston9
- New Ipswich9
- New London9
- Newbury9
- Newport9
- North Conway9
- Northfield9
- Northwood9
- Nottingham9
- Ossipee9
- Pinardville9
- Pittsfield9
- Plymouth9
- Rindge9
- Rumney9
- Salisbury9
- South Hooksett9
- Springfield9
- Sullivan9
- Suncook9
- Swanzey9
- Tamworth9
- Temple9
- Thornton9
- Tilton9
- Tilton Northfield9
- Tuftonboro9
- Wakefield9
- Walpole9
- Warner9
- Weare9
- Webster9
- West Swanzey9
- Wilmot9
- Wilton9
- Winchester9
- Windham9
- Wolfeboro9
- Woodsville9
- Atkinson8
- Epping8
- Fremont8
- Hampstead8
- Raymond8
- Rochester8
- Sandown8
- Strafford8
- Brentwood7
- Danville7
- Exeter7
- Kingston7
- Lee7
- Plaistow7
- Rockingham7
- Somersworth7
- Barrington6
- Durham6
- East Kingston6
- Effingham6
- Hampton6
- Hampton Beach6
- Hooksett6
- Kensington6
- Madbury6
- New Castle6
- Newfields6
- Newmarket6
- North Hampton6
- Rollinsford6
- Rye6
- Seabrook6
- Stratham6
- Warren6
- Troy3
