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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 |  Sandwich | 46 |
| 2 | Deerfield | 31 |
| 3 | Effingham | 27 |
| 4 | Portsmouth | 27 |
| 5 | West Lebanon | 27 |
| 6 | Littleton | 24 |
| 7 | Hanover | 19 |
| 8 | Concord | 18 |
| 9 | Laconia | 17 |
| 10 | Dover | 16 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
33 Contributors
See all
LIVE AQI CITY RANKING
Real-time New Hampshire
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Wilton | 0 |
| 2 | Troy | 1 |
| 3 | Barrington | 3 |
| 4 | Chesterfield | 4 |
| 5 | Gilford | 5 |
| 6 | Conway | 8 |
| 7 | Meredith | 8 |
| 8 | Peterborough | 8 |
| 9 | Barnstead | 10 |
| 10 | Brookline | 10 |
(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?
- Alstead 56
- Antrim 56
- Charlestown 56
- Claremont 56
- Deering 56
- Dublin 56
- Fitzwilliam 56
- Francestown 56
- Greenfield 56
- Harrisville 56
- Hillsborough 56
- Hinsdale 56
- Jaffrey 56
- Lempster 56
- Marlborough 56
- Newbury 56
- Newport 56
- Richmond 56
- Rindge 56
- Sunapee 56
- Swanzey 56
- Temple 56
- Unity 56
- West Swanzey 56
- Westmoreland 56
- Winchester 56
- Andover 55
- Bedford 55
- Bow Bog 55
- Contoocook 55
- East Merrimack 55
- Enfield 55
- Goffstown 55
- Grantham 55
- Greenville 55
- Henniker 55
- Hollis 55
- Hopkinton 55
- Hudson 55
- Lebanon 55
- Litchfield 55
- Lyndeborough 55
- Manchester 55
- Mason 55
- Merrimack 55
- Milford 55
- Mont Vernon 55
- New Boston 55
- New Ipswich 55
- New London 55
- Pinardville 55
- South Hooksett 55
- Springfield 55
- Weare 55
- Webster 55
- Wilmot 55
- Alexandria 54
- Allenstown 54
- Auburn 54
- Boscawen 54
- Bridgewater 54
- Bristol 54
- Candia 54
- Canterbury 54
- Chester 54
- Chichester 54
- Danbury 54
- Derry 54
- Derry Village 54
- East Concord 54
- Epsom 54
- Franklin 54
- Grafton 54
- Greenland 54
- Hill 54
- Nashua 54
- New Castle 54
- North Hampton 54
- Northfield 54
- Pelham 54
- Pembroke 54
- Rollinsford 54
- Rye 54
- Salisbury 54
- Sanbornton 54
- Somersworth 54
- Tilton 54
- Tilton-Northfield 54
- Windham 54
- Ashland 53
- Atkinson 53
- Belmont 53
- Center Harbor 53
- Danville 53
- Durham 53
- East Kingston 53
- Epping 53
- Exeter 53
- Farmington 53
- Freedom 53
- Fremont 53
- Gilmanton 53
- Hampstead 53
- Hampton 53
- Hampton Beach 53
- Hampton Falls 53
- Holderness 53
- Kensington 53
- Kingston 53
- Lee 53
- Lyme 53
- Madbury 53
- Madison 53
- Moultonborough 53
- New Durham 53
- Newmarket 53
- Newton 53
- Northwood 53
- Nottingham 53
- Ossipee 53
- Pittsfield 53
- Plaistow 53
- Plymouth 53
- Raymond 53
- Rochester 53
- Rumney 53
- Salem 53
- Sanbornville 53
- Sandown 53
- Seabrook 53
- Strafford 53
- Stratham Station 53
- Tuftonboro 53
- Wakefield 53
- Wolfeboro 53
- North Conway 52
- Tamworth 52
- Thornton 51
- Colebrook 50
- North Woodstock 50
- Berlin 49
- Gorham 49
- Jackson 49
- Milan 49
- Orford 49
- Woodstock 49
- Randolph 48
- Groveton 47
- Jefferson 47
- Northumberland 47
- Stratford 47
- Lancaster 46
- Sandwich 46
- Whitefield 46
- North Haverhill 44
- Woodsville 43
- Haverhill 41
- Deerfield 31
- Effingham 27
- Portsmouth 27
- West Lebanon 27
- Littleton 24
- Hanover 19
- Concord 18
- Laconia 17
- Dover 16
- Londonderry 16
- Brentwood 15
- Hooksett 14
- Keene 13
- Suncook 13
- Sutton 13
- Barnstead 10
- Brookline 10
- Conway 8
- Meredith 8
- Peterborough 8
- Gilford 5
- Chesterfield 4
- Barrington 3
- Troy 1
- Wilton 0
AQI US, Metric