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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 |  Portsmouth | 28 |
| 2 | Hanover | 21 |
| 3 | Concord | 20 |
| 4 | Sutton | 20 |
| 5 | West Lebanon | 20 |
| 6 | Deerfield | 18 |
| 7 | Laconia | 18 |
| 8 | Littleton | 18 |
| 9 | Meredith | 17 |
| 10 | Effingham | 16 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
34 Contributors
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LIVE AQI CITY RANKING
Real-time New Hampshire
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Troy | 0 |
| 2 | Wilton | 2 |
| 3 | Salem | 3 |
| 4 | Barrington | 6 |
| 5 | Barnstead | 7 |
| 6 | Peterborough | 8 |
| 7 | Conway | 9 |
| 8 | Gilford | 9 |
| 9 | Dover | 10 |
| 10 | Brentwood | 12 |
(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
34Contributors
Government Contributor
- water1998
1 station
Non-profit organization Contributor
- 30 Anonymous contributors
30 stations
30 Anonymous Contributors
Which is the most polluted city in New Hampshire?
- Portsmouth 28
- Berlin 23
- Colebrook 23
- Milan 23
- Stratford 23
- Gorham 22
- Groveton 22
- Hanover 21
- Jackson 21
- Jefferson 21
- Lancaster 21
- North Haverhill 21
- Northumberland 21
- Randolph 21
- Whitefield 21
- Woodsville 21
- Concord 20
- Haverhill 20
- North Conway 20
- Sutton 20
- West Lebanon 20
- Woodstock 20
- Alexandria 19
- Alstead 19
- Andover 19
- Ashland 19
- Bridgewater 19
- Bristol 19
- Charlestown 19
- Claremont 19
- Danbury 19
- Enfield 19
- Freedom 19
- Grafton 19
- Grantham 19
- Hill 19
- Hinsdale 19
- Holderness 19
- Lebanon 19
- Lempster 19
- Lyme 19
- Madison 19
- Moultonborough 19
- New London 19
- Newbury 19
- Newport 19
- North Woodstock 19
- Orford 19
- Plymouth 19
- Rumney 19
- Springfield 19
- Sunapee 19
- Tamworth 19
- Thornton 19
- Unity 19
- Westmoreland 19
- Wilmot 19
- Center Harbor 18
- Deerfield 18
- Dublin 18
- Fitzwilliam 18
- Harrisville 18
- Laconia 18
- Littleton 18
- Marlborough 18
- Richmond 18
- Swanzey 18
- Tuftonboro 18
- West Swanzey 18
- Winchester 18
- Allenstown 17
- Antrim 17
- Auburn 17
- Bedford 17
- Belmont 17
- Boscawen 17
- Bow Bog 17
- Candia 17
- Canterbury 17
- Chester 17
- Chichester 17
- Contoocook 17
- Danville 17
- Deering 17
- Derry 17
- Derry Village 17
- Durham 17
- East Concord 17
- East Kingston 17
- East Merrimack 17
- Epping 17
- Epsom 17
- Exeter 17
- Farmington 17
- Francestown 17
- Franklin 17
- Fremont 17
- Gilmanton 17
- Goffstown 17
- Greenfield 17
- Greenland 17
- Greenville 17
- Hampstead 17
- Hampton 17
- Hampton Beach 17
- Hampton Falls 17
- Henniker 17
- Hillsborough 17
- Hollis 17
- Hopkinton 17
- Hudson 17
- Jaffrey 17
- Kensington 17
- Kingston 17
- Lee 17
- Litchfield 17
- Lyndeborough 17
- Madbury 17
- Manchester 17
- Mason 17
- Meredith 17
- Merrimack 17
- Milford 17
- Mont Vernon 17
- Nashua 17
- New Boston 17
- New Castle 17
- New Durham 17
- New Ipswich 17
- Newmarket 17
- Newton 17
- North Hampton 17
- Northfield 17
- Northwood 17
- Nottingham 17
- Ossipee 17
- Pembroke 17
- Pinardville 17
- Pittsfield 17
- Raymond 17
- Rindge 17
- Rochester 17
- Rollinsford 17
- Rye 17
- Salisbury 17
- Sanbornton 17
- Sanbornville 17
- Sandown 17
- Seabrook 17
- Somersworth 17
- South Hooksett 17
- Strafford 17
- Stratham Station 17
- Temple 17
- Tilton 17
- Tilton-Northfield 17
- Wakefield 17
- Weare 17
- Webster 17
- Wolfeboro 17
- Atkinson 16
- Effingham 16
- Pelham 16
- Plaistow 16
- Windham 16
- Brookline 14
- Hooksett 14
- Keene 14
- Londonderry 14
- Sandwich 13
- Brentwood 12
- Chesterfield 12
- Suncook 12
- Dover 10
- Conway 9
- Gilford 9
- Peterborough 8
- Barnstead 7
- Barrington 6
- Salem 3
- Wilton 2
- Troy 0
AQI US, Metric