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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 |  Effingham | 31 |
| 2 | Meredith | 27 |
| 3 | Portsmouth | 25 |
| 4 | Laconia | 24 |
| 5 | Londonderry | 23 |
| 6 | Peterborough | 23 |
| 7 | Hanover | 22 |
| 8 | Sutton | 21 |
| 9 | Concord | 20 |
| 10 | Deerfield | 19 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
31 Contributors
See all
LIVE AQI CITY RANKING
Real-time New Hampshire
Cleanest city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Troy | 0 |
| 2 | Barrington | 2 |
| 3 | Brookline | 3 |
| 4 | Brentwood | 4 |
| 5 | Dover | 4 |
| 6 | Barnstead | 6 |
| 7 | Suncook | 7 |
| 8 | Sandwich | 10 |
| 9 | Keene | 11 |
| 10 | Chesterfield | 12 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
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Moderate
Unhealthy for sensitive groups
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News
The latest air quality news and resources.
New Hampshire air quality data attribution
31Contributors
Government Contributor
- water1998
1 station
Non-profit organization Contributor
- 27 Anonymous contributors
27 stations
27 Anonymous Contributors
Which is the most polluted city in New Hampshire?
- Effingham 31
- Meredith 27
- Portsmouth 25
- Laconia 24
- Londonderry 23
- Peterborough 23
- Hanover 22
- Colebrook 21
- Sutton 21
- Berlin 20
- Concord 20
- Groveton 20
- Milan 20
- Northumberland 20
- Stratford 20
- Deerfield 19
- Gorham 19
- Haverhill 19
- Jackson 19
- Jefferson 19
- Lancaster 19
- North Conway 19
- North Haverhill 19
- Randolph 19
- Whitefield 19
- Woodsville 19
- Ashland 18
- Center Harbor 18
- Freedom 18
- Holderness 18
- Lyme 18
- Madison 18
- Moultonborough 18
- North Woodstock 18
- Orford 18
- Plymouth 18
- Rumney 18
- Tamworth 18
- Thornton 18
- Tuftonboro 18
- West Lebanon 18
- Woodstock 18
- Alexandria 17
- Bridgewater 17
- Enfield 17
- Lebanon 17
- Ossipee 17
- Bristol 16
- Hooksett 16
- Littleton 16
- Wolfeboro 16
- Andover 15
- Charlestown 15
- Claremont 15
- Danbury 15
- Grafton 15
- Grantham 15
- Hill 15
- New London 15
- Newport 15
- Springfield 15
- Sunapee 15
- Unity 15
- Wilmot 15
- Allenstown 14
- Alstead 14
- Antrim 14
- Belmont 14
- Boscawen 14
- Bow Bog 14
- Canterbury 14
- Chichester 14
- Contoocook 14
- Conway 14
- Deering 14
- East Concord 14
- Epsom 14
- Farmington 14
- Franklin 14
- Gilford 14
- Gilmanton 14
- Greenfield 14
- Henniker 14
- Hillsborough 14
- Hopkinton 14
- Lempster 14
- New Durham 14
- Newbury 14
- Northfield 14
- Pembroke 14
- Pittsfield 14
- Salisbury 14
- Sanbornton 14
- Sanbornville 14
- Strafford 14
- Tilton 14
- Tilton-Northfield 14
- Wakefield 14
- Weare 14
- Webster 14
- Westmoreland 14
- Candia 13
- Dublin 13
- Francestown 13
- Goffstown 13
- Harrisville 13
- Hinsdale 13
- Lyndeborough 13
- Manchester 13
- Marlborough 13
- New Boston 13
- Northwood 13
- Pinardville 13
- Rochester 13
- South Hooksett 13
- Swanzey 13
- West Swanzey 13
- Auburn 12
- Bedford 12
- Chesterfield 12
- Fitzwilliam 12
- Jaffrey 12
- Lee 12
- Merrimack 12
- Milford 12
- Mont Vernon 12
- Nottingham 12
- Raymond 12
- Richmond 12
- Rollinsford 12
- Somersworth 12
- Temple 12
- Wilton 12
- Winchester 12
- Chester 11
- Derry 11
- Derry Village 11
- Durham 11
- East Merrimack 11
- Epping 11
- Fremont 11
- Greenland 11
- Greenville 11
- Hollis 11
- Keene 11
- Litchfield 11
- Madbury 11
- Mason 11
- New Ipswich 11
- Newmarket 11
- Rindge 11
- Sandown 11
- Stratham Station 11
- Atkinson 10
- Danville 10
- East Kingston 10
- Exeter 10
- Hampstead 10
- Hampton 10
- Hudson 10
- Kingston 10
- Nashua 10
- New Castle 10
- North Hampton 10
- Pelham 10
- Plaistow 10
- Rye 10
- Salem 10
- Sandwich 10
- Windham 10
- Hampton Beach 9
- Hampton Falls 9
- Kensington 9
- Newton 9
- Seabrook 9
- Suncook 7
- Barnstead 6
- Brentwood 4
- Dover 4
- Brookline 3
- Barrington 2
- Troy 0
AQI US, Metric