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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 | 41 |
| 2 | Littleton | 40 |
| 3 | Deerfield | 39 |
| 4 | Concord | 38 |
| 5 | Hanover | 38 |
| 6 | Keene | 36 |
| 7 | Londonderry | 33 |
| 8 | Portsmouth | 32 |
| 9 | Sandwich | 31 |
| 10 | Sutton | 31 |
(local time)
SEE WORLD AQI RANKINGAIR QUALITY DATA CONTRIBUTORS
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New Hampshire air quality data attribution
33Contributors
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29 stations
29 Anonymous Contributors
Which is the most polluted city in New Hampshire?
- Alexandria 55
- Allenstown 55
- Alstead 55
- Andover 55
- Antrim 55
- Ashland 55
- Atkinson 55
- Auburn 55
- Bedford 55
- Belmont 55
- Berlin 55
- Boscawen 55
- Bow Bog 55
- Bridgewater 55
- Bristol 55
- Candia 55
- Canterbury 55
- Center Harbor 55
- Charlestown 55
- Chester 55
- Chichester 55
- Claremont 55
- Colebrook 55
- Contoocook 55
- Danbury 55
- Danville 55
- Deering 55
- Derry 55
- Derry Village 55
- Dublin 55
- Durham 55
- East Concord 55
- East Kingston 55
- East Merrimack 55
- Enfield 55
- Epping 55
- Epsom 55
- Exeter 55
- Farmington 55
- Fitzwilliam 55
- Francestown 55
- Franklin 55
- Freedom 55
- Fremont 55
- Gilmanton 55
- Goffstown 55
- Gorham 55
- Grafton 55
- Grantham 55
- Greenfield 55
- Greenland 55
- Greenville 55
- Groveton 55
- Hampstead 55
- Hampton 55
- Hampton Beach 55
- Hampton Falls 55
- Harrisville 55
- Haverhill 55
- Henniker 55
- Hill 55
- Hillsborough 55
- Hinsdale 55
- Holderness 55
- Hollis 55
- Hopkinton 55
- Hudson 55
- Jackson 55
- Jaffrey 55
- Jefferson 55
- Kensington 55
- Kingston 55
- Lancaster 55
- Lebanon 55
- Lee 55
- Lempster 55
- Litchfield 55
- Lyme 55
- Lyndeborough 55
- Madbury 55
- Madison 55
- Manchester 55
- Marlborough 55
- Mason 55
- Merrimack 55
- Milan 55
- Milford 55
- Mont Vernon 55
- Moultonborough 55
- Nashua 55
- New Boston 55
- New Castle 55
- New Durham 55
- New Ipswich 55
- New London 55
- Newbury 55
- Newmarket 55
- Newport 55
- Newton 55
- North Conway 55
- North Hampton 55
- North Haverhill 55
- North Woodstock 55
- Northfield 55
- Northumberland 55
- Northwood 55
- Nottingham 55
- Orford 55
- Ossipee 55
- Pembroke 55
- Pinardville 55
- Pittsfield 55
- Plaistow 55
- Plymouth 55
- Randolph 55
- Raymond 55
- Richmond 55
- Rindge 55
- Rochester 55
- Rollinsford 55
- Rumney 55
- Rye 55
- Salisbury 55
- Sanbornton 55
- Sanbornville 55
- Sandown 55
- Seabrook 55
- Somersworth 55
- South Hooksett 55
- Springfield 55
- Strafford 55
- Stratford 55
- Stratham Station 55
- Sunapee 55
- Swanzey 55
- Tamworth 55
- Temple 55
- Thornton 55
- Tilton 55
- Tilton-Northfield 55
- Tuftonboro 55
- Unity 55
- Wakefield 55
- Weare 55
- Webster 55
- West Swanzey 55
- Westmoreland 55
- Whitefield 55
- Wilmot 55
- Winchester 55
- Windham 55
- Wolfeboro 55
- Woodstock 55
- Woodsville 55
- Pelham 54
- Peterborough 41
- Littleton 40
- Deerfield 39
- Concord 38
- Hanover 38
- Keene 36
- Londonderry 33
- Portsmouth 32
- Sandwich 31
- Sutton 31
- West Lebanon 31
- Meredith 30
- Chesterfield 29
- Laconia 29
- Gilford 27
- Suncook 26
- Barnstead 23
- Conway 21
- Brentwood 20
- Brookline 20
- Hooksett 18
- Dover 17
- Troy 14
- Salem 12
- Barrington 11
- Effingham 11
- Wilton 11
AQI US, Metric