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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 |  Peterborough | 34 |
| 2 | Concord | 32 |
| 3 | Sandwich | 31 |
| 4 | Hanover | 29 |
| 5 | Littleton | 27 |
| 6 | West Lebanon | 27 |
| 7 | Deerfield | 25 |
| 8 | Portsmouth | 19 |
| 9 | Laconia | 18 |
| 10 | Sutton | 17 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
32 Contributors
See all
LIVE AQI CITY RANKING
Real-time New Hampshire
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Troy | 1 |
| 2 | Wilton | 4 |
| 3 | Effingham | 5 |
| 4 | Hooksett | 5 |
| 5 | Barnstead | 9 |
| 6 | Barrington | 10 |
| 7 | Brookline | 10 |
| 8 | Gilford | 10 |
| 9 | Brentwood | 11 |
| 10 | Chesterfield | 11 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Unhealthy for sensitive groups
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News
The latest air quality news and resources.
New Hampshire air quality data attribution
32Contributors
Government Contributor
- water1998
1 station
Non-profit organization Contributor
- 28 Anonymous contributors
28 stations
28 Anonymous Contributors
Which is the most polluted city in New Hampshire?
- Rollinsford 44
- Sanbornville 44
- Somersworth 44
- Wakefield 44
- Farmington 43
- Rochester 43
- New Durham 42
- Strafford 42
- Wolfeboro 42
- Madbury 41
- Northwood 41
- Ossipee 41
- Durham 40
- Lee 39
- Nottingham 39
- Pittsfield 39
- Freedom 38
- Newmarket 38
- Candia 37
- Epsom 37
- New Castle 37
- Stratham Station 37
- Tuftonboro 37
- Allenstown 36
- Chichester 36
- Epping 36
- Gilmanton 36
- Greenland 36
- Raymond 36
- Auburn 35
- Bow Bog 35
- Canterbury 35
- Chester 35
- East Concord 35
- Fremont 35
- Manchester 35
- Pembroke 35
- South Hooksett 35
- Bedford 34
- Belmont 34
- Boscawen 34
- Danville 34
- Derry 34
- Derry Village 34
- Exeter 34
- Goffstown 34
- Kingston 34
- Peterborough 34
- Pinardville 34
- Sandown 34
- East Kingston 33
- East Merrimack 33
- Hampstead 33
- Hopkinton 33
- Merrimack 33
- North Hampton 33
- North Woodstock 33
- Tilton 33
- Concord 32
- Litchfield 32
- Northfield 32
- Sanbornton 32
- Tilton-Northfield 32
- Atkinson 31
- Contoocook 31
- Franklin 31
- Hampton 31
- Kensington 31
- New Boston 31
- Plaistow 31
- Rye 31
- Salisbury 31
- Sandwich 31
- Weare 31
- Webster 31
- Hampton Falls 30
- Mont Vernon 30
- Newton 30
- Windham 30
- Hanover 29
- Madison 29
- Milford 29
- Nashua 29
- Salem 29
- Seabrook 29
- Center Harbor 28
- Deering 28
- Francestown 28
- Henniker 28
- Hudson 28
- Lyndeborough 28
- Greenfield 27
- Hampton Beach 27
- Hill 27
- Hillsborough 27
- Hollis 27
- Littleton 27
- Moultonborough 27
- North Conway 27
- Pelham 27
- Tamworth 27
- West Lebanon 27
- Antrim 26
- Greenville 26
- Mason 26
- Temple 26
- Andover 25
- Deerfield 25
- New Ipswich 25
- Wilmot 24
- Ashland 23
- Bristol 23
- Dublin 23
- Holderness 23
- Jaffrey 23
- Randolph 23
- Rindge 23
- Alexandria 22
- Alstead 22
- Berlin 22
- Bridgewater 22
- Charlestown 22
- Claremont 22
- Colebrook 22
- Danbury 22
- Enfield 22
- Fitzwilliam 22
- Gorham 22
- Grafton 22
- Grantham 22
- Groveton 22
- Harrisville 22
- Haverhill 22
- Jackson 22
- Lebanon 22
- Lempster 22
- Lyme 22
- Marlborough 22
- Milan 22
- New London 22
- Newbury 22
- Newport 22
- Orford 22
- Plymouth 22
- Richmond 22
- Rumney 22
- Springfield 22
- Stratford 22
- Sunapee 22
- Swanzey 22
- Unity 22
- West Swanzey 22
- Westmoreland 22
- Woodsville 22
- Hinsdale 21
- Jefferson 21
- Lancaster 21
- North Haverhill 21
- Northumberland 21
- Thornton 21
- Whitefield 21
- Winchester 21
- Woodstock 21
- Portsmouth 19
- Laconia 18
- Sutton 17
- Keene 16
- Conway 15
- Dover 14
- Londonderry 14
- Suncook 13
- Brentwood 11
- Chesterfield 11
- Meredith 11
- Barrington 10
- Brookline 10
- Gilford 10
- Barnstead 9
- Effingham 5
- Hooksett 5
- Wilton 4
- Troy 1
AQI US, Metric