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Air quality in New Hampshire
Air quality index (AQI) and PM2.5 air pollution in New Hampshire
LIVE AQI CITY RANKING
Real-time New Hampshire
Most polluted city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Deerfield | 35 |
| 2 | Littleton | 33 |
| 3 | Peterborough | 32 |
| 4 | Londonderry | 30 |
| 5 | Concord | 28 |
| 6 | Effingham | 28 |
| 7 | Portsmouth | 26 |
| 8 | West Lebanon | 24 |
| 9 | Keene | 23 |
| 10 | Meredith | 23 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
33 Contributors
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LIVE AQI CITY RANKING
Real-time New Hampshire
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Salem | 5 |
| 2 | Wilton | 5 |
| 3 | Troy | 6 |
| 4 | Barrington | 7 |
| 5 | Brentwood | 13 |
| 6 | Conway | 14 |
| 7 | Chesterfield | 15 |
| 8 | Gilford | 15 |
| 9 | Brookline | 17 |
| 10 | Dover | 17 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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News
The latest air quality news and resources.
New Hampshire air quality data attribution
33Contributors
Government Contributor
- water1998
1 station
Non-profit organization Contributor
- 29 Anonymous contributors
29 stations
29 Anonymous Contributors
Which is the most polluted city in New Hampshire?
- Deerfield 35
- Littleton 33
- Colebrook 32
- Peterborough 32
- Randolph 32
- Berlin 31
- Milan 31
- Gorham 30
- Groveton 30
- Londonderry 30
- Northumberland 30
- Stratford 30
- Jackson 29
- Jefferson 29
- Lancaster 29
- North Conway 29
- Concord 28
- Effingham 28
- Freedom 28
- Haverhill 28
- Madison 28
- North Haverhill 28
- Whitefield 28
- Woodsville 28
- North Woodstock 27
- Tamworth 27
- Woodstock 27
- Alexandria 26
- Andover 26
- Ashland 26
- Belmont 26
- Bridgewater 26
- Bristol 26
- Center Harbor 26
- Claremont 26
- Danbury 26
- Enfield 26
- Franklin 26
- Gilmanton 26
- Grafton 26
- Grantham 26
- Hill 26
- Holderness 26
- Lebanon 26
- Lyme 26
- Moultonborough 26
- New Durham 26
- New London 26
- Newbury 26
- Newport 26
- Northfield 26
- Orford 26
- Ossipee 26
- Plymouth 26
- Portsmouth 26
- Rumney 26
- Salisbury 26
- Sanbornton 26
- Sanbornville 26
- Springfield 26
- Sunapee 26
- Thornton 26
- Tilton 26
- Tilton-Northfield 26
- Tuftonboro 26
- Wakefield 26
- Webster 26
- Wilmot 26
- Wolfeboro 26
- Allenstown 25
- Boscawen 25
- Canterbury 25
- Chichester 25
- Contoocook 25
- Deering 25
- East Concord 25
- Epsom 25
- Farmington 25
- Henniker 25
- Hillsborough 25
- Hopkinton 25
- Lempster 25
- Pittsfield 25
- Rochester 25
- Strafford 25
- Unity 25
- Weare 25
- Alstead 24
- Antrim 24
- Auburn 24
- Bedford 24
- Bow Bog 24
- Candia 24
- Charlestown 24
- Chester 24
- Derry 24
- Derry Village 24
- Dublin 24
- East Merrimack 24
- Fitzwilliam 24
- Francestown 24
- Fremont 24
- Goffstown 24
- Greenfield 24
- Greenville 24
- Harrisville 24
- Hinsdale 24
- Hollis 24
- Hudson 24
- Jaffrey 24
- Litchfield 24
- Lyndeborough 24
- Manchester 24
- Marlborough 24
- Mason 24
- Merrimack 24
- Milford 24
- Mont Vernon 24
- Nashua 24
- New Boston 24
- New Ipswich 24
- Northwood 24
- Nottingham 24
- Pelham 24
- Pembroke 24
- Pinardville 24
- Raymond 24
- Richmond 24
- Rindge 24
- Sandown 24
- Somersworth 24
- South Hooksett 24
- Swanzey 24
- Temple 24
- West Lebanon 24
- West Swanzey 24
- Westmoreland 24
- Winchester 24
- Windham 24
- Atkinson 23
- Danville 23
- Durham 23
- Epping 23
- Hampstead 23
- Keene 23
- Lee 23
- Madbury 23
- Meredith 23
- Rollinsford 23
- Sutton 23
- East Kingston 22
- Exeter 22
- Greenland 22
- Kingston 22
- New Castle 22
- Newmarket 22
- Newton 22
- Plaistow 22
- Rye 22
- Stratham Station 22
- Hampton 21
- Hampton Beach 21
- Hampton Falls 21
- Kensington 21
- Laconia 21
- North Hampton 21
- Seabrook 21
- Suncook 20
- Barnstead 18
- Brookline 17
- Dover 17
- Hanover 17
- Hooksett 17
- Sandwich 17
- Chesterfield 15
- Gilford 15
- Conway 14
- Brentwood 13
- Barrington 7
- Troy 6
- Salem 5
- Wilton 5
AQI US, Metric