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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 |  Littleton | 52 |
| 2 | Sandwich | 52 |
| 3 | Meredith | 29 |
| 4 | Effingham | 28 |
| 5 | Hanover | 28 |
| 6 | Londonderry | 27 |
| 7 | Deerfield | 26 |
| 8 | Concord | 25 |
| 9 | Portsmouth | 25 |
| 10 | Laconia | 24 |
(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 | Salem | 0 |
| 2 | Wilton | 2 |
| 3 | Troy | 3 |
| 4 | Barrington | 4 |
| 5 | Brentwood | 5 |
| 6 | Dover | 7 |
| 7 | Brookline | 8 |
| 8 | Conway | 12 |
| 9 | Barnstead | 13 |
| 10 | Peterborough | 13 |
(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?
- Littleton 52
- Sandwich 52
- Meredith 29
- Effingham 28
- Hanover 28
- North Woodstock 28
- Londonderry 27
- Colebrook 26
- Deerfield 26
- Stratford 26
- Concord 25
- Groveton 25
- Milan 25
- Northumberland 25
- Portsmouth 25
- Berlin 24
- Gorham 24
- Haverhill 24
- Jackson 24
- Jefferson 24
- Laconia 24
- Lancaster 24
- North Haverhill 24
- Randolph 24
- Sutton 24
- Whitefield 24
- Woodsville 24
- Enfield 23
- Lebanon 23
- Lyme 23
- North Conway 23
- Orford 23
- Rumney 23
- Thornton 23
- Woodstock 23
- Alexandria 22
- Alstead 22
- Andover 22
- Antrim 22
- Ashland 22
- Bridgewater 22
- Bristol 22
- Center Harbor 22
- Charlestown 22
- Claremont 22
- Danbury 22
- Franklin 22
- Grafton 22
- Grantham 22
- Harrisville 22
- Henniker 22
- Hill 22
- Hillsborough 22
- Hinsdale 22
- Holderness 22
- Lempster 22
- Marlborough 22
- Moultonborough 22
- Nashua 22
- New London 22
- Newbury 22
- Newport 22
- Plymouth 22
- Richmond 22
- Salisbury 22
- Springfield 22
- Sunapee 22
- Swanzey 22
- Tamworth 22
- Unity 22
- Webster 22
- West Swanzey 22
- Westmoreland 22
- Wilmot 22
- Winchester 22
- Contoocook 21
- Deering 21
- Dublin 21
- Fitzwilliam 21
- Hopkinton 21
- Jaffrey 21
- Madison 21
- Northfield 21
- Rye 21
- Sanbornton 21
- Tilton 21
- Tilton-Northfield 21
- West Lebanon 21
- Boscawen 20
- Greenfield 20
- Rindge 20
- Weare 20
- Canterbury 19
- Francestown 19
- Gilford 19
- Belmont 18
- Keene 18
- Tuftonboro 18
- East Concord 17
- Freedom 17
- Temple 17
- Chesterfield 16
- Gilmanton 16
- Lyndeborough 16
- New Boston 16
- New Ipswich 16
- Ossipee 16
- Wolfeboro 16
- Allenstown 15
- Bow Bog 15
- Chichester 15
- Epsom 15
- Goffstown 15
- Greenville 15
- Hooksett 15
- Mont Vernon 15
- New Durham 15
- Pembroke 15
- Pinardville 15
- Pittsfield 15
- Sanbornville 15
- Strafford 15
- Wakefield 15
- Bedford 14
- Candia 14
- Farmington 14
- Manchester 14
- Mason 14
- Milford 14
- Northwood 14
- Rochester 14
- South Hooksett 14
- Suncook 14
- Auburn 13
- Barnstead 13
- East Merrimack 13
- Hollis 13
- Merrimack 13
- Peterborough 13
- Conway 12
- Litchfield 11
- Chester 10
- Derry Village 10
- Nottingham 10
- Raymond 10
- Derry 9
- Hudson 9
- Somersworth 9
- Brookline 8
- Epping 8
- Fremont 8
- Hampstead 8
- Lee 8
- Madbury 8
- Pelham 8
- Rollinsford 8
- Sandown 8
- Windham 8
- Atkinson 7
- Danville 7
- Dover 7
- Durham 7
- Kingston 7
- East Kingston 6
- Exeter 6
- Greenland 6
- Kensington 6
- Newmarket 6
- Newton 6
- Plaistow 6
- Stratham Station 6
- Brentwood 5
- Hampton 5
- Hampton Beach 5
- Hampton Falls 5
- New Castle 5
- North Hampton 5
- Seabrook 5
- Barrington 4
- Troy 3
- Wilton 2
- Salem 0
AQI US, Metric