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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 |  Hillsborough | 55 |
| 2 | Keene | 49 |
| 3 | Thornton | 45 |
| 4 | Deerfield | 42 |
| 5 | Brookline | 38 |
| 6 | Chesterfield | 38 |
| 7 | Londonderry | 37 |
| 8 | Suncook | 37 |
| 9 | Littleton | 35 |
| 10 | Peterborough | 35 |
(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 | 12 |
| 2 | Barrington | 13 |
| 3 | Wilton | 16 |
| 4 | Dover | 19 |
| 5 | Salem | 20 |
| 6 | Brentwood | 21 |
| 7 | Barnstead | 27 |
| 8 | Hooksett | 28 |
| 9 | West Lebanon | 28 |
| 10 | Effingham | 30 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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The latest air quality news and resources.
New Hampshire air quality data attribution
34Contributors
Government Contributor
- water1998
1 station
Non-profit organization Contributor
- AirGradient
2 stations
Corporate Contributor
- 29 Anonymous contributors
29 stations
29 Anonymous Contributors
Which is the most polluted city in New Hampshire?
- Hillsborough 55
- Keene 49
- Thornton 45
- Deerfield 42
- Brookline 38
- Chesterfield 38
- Greenville 37
- Londonderry 37
- Mason 37
- New Ipswich 37
- Rindge 37
- Suncook 37
- Fitzwilliam 36
- Hollis 36
- Jaffrey 36
- Temple 36
- Hudson 35
- Littleton 35
- Lyndeborough 35
- Milford 35
- Mont Vernon 35
- Nashua 35
- Peterborough 35
- Richmond 35
- Dublin 34
- East Merrimack 34
- Francestown 34
- Greenfield 34
- Laconia 34
- Litchfield 34
- Merrimack 34
- New Boston 34
- Antrim 33
- Bedford 33
- Colebrook 33
- Concord 33
- Deering 33
- Goffstown 33
- Harrisville 33
- Manchester 33
- Marlborough 33
- Meredith 33
- Pelham 33
- Pinardville 33
- Portsmouth 33
- Swanzey 33
- Weare 33
- West Swanzey 33
- Winchester 33
- Bow Bog 32
- Contoocook 32
- Conway 32
- Derry 32
- Derry Village 32
- Groveton 32
- Henniker 32
- Hinsdale 32
- Hopkinton 32
- Northumberland 32
- South Hooksett 32
- Stratford 32
- Windham 32
- Alexandria 31
- Allenstown 31
- Alstead 31
- Andover 31
- Auburn 31
- Boscawen 31
- Bridgewater 31
- Bristol 31
- Canterbury 31
- Danbury 31
- East Concord 31
- Enfield 31
- Franklin 31
- Gilford 31
- Grafton 31
- Grantham 31
- Hanover 31
- Haverhill 31
- Hill 31
- Jefferson 31
- Lancaster 31
- Lempster 31
- Lyme 31
- New London 31
- Newbury 31
- Newport 31
- North Haverhill 31
- Orford 31
- Pembroke 31
- Rumney 31
- Salisbury 31
- Sandwich 31
- Springfield 31
- Sunapee 31
- Unity 31
- Webster 31
- Westmoreland 31
- Whitefield 31
- Wilmot 31
- Woodsville 31
- Ashland 30
- Belmont 30
- Candia 30
- Charlestown 30
- Chester 30
- Chichester 30
- Claremont 30
- Effingham 30
- Epsom 30
- Holderness 30
- Lebanon 30
- North Woodstock 30
- Northfield 30
- Plymouth 30
- Sanbornton 30
- Sutton 30
- Tilton 30
- Tilton-Northfield 30
- Woodstock 30
- Berlin 29
- Center Harbor 29
- Gilmanton 29
- Gorham 29
- Jackson 29
- Milan 29
- Moultonborough 29
- North Conway 29
- Pittsfield 29
- Randolph 29
- Tamworth 29
- Freedom 28
- Hampstead 28
- Hooksett 28
- Madison 28
- New Durham 28
- Ossipee 28
- Raymond 28
- Sandown 28
- Strafford 28
- Tuftonboro 28
- West Lebanon 28
- Wolfeboro 28
- Atkinson 27
- Barnstead 27
- Farmington 27
- Fremont 27
- Northwood 27
- Sanbornville 27
- Wakefield 27
- Danville 26
- Epping 26
- Nottingham 26
- Plaistow 26
- Rochester 26
- East Kingston 25
- Kingston 25
- Lee 25
- Newton 25
- Durham 23
- Exeter 23
- Kensington 23
- Madbury 23
- Newmarket 23
- Seabrook 23
- Somersworth 23
- Hampton 22
- Hampton Beach 22
- Hampton Falls 22
- Rollinsford 22
- Stratham Station 22
- Brentwood 21
- Greenland 21
- North Hampton 21
- New Castle 20
- Rye 20
- Salem 20
- Dover 19
- Wilton 16
- Barrington 13
- Troy 12
AQI US, Metric