New Hampshire has 3 cities in our database, serving approximately 250,593 residents. The average PurityMap score is 85.0/100 (Grade: A), which is 7.1 points above the US average of 77.9/100. Manchester has the cleanest water (85/100) while Manchester scores lowest (85/100) due to lower overall score.
Is New Hampshire Tap Water Safe to Drink?
Safe to Drink
New Hampshire tap water is safe to drink based on our analysis of 3 water systems serving 250,593 residents. The average PurityMap score is 85.0/100 (Grade: A), which is 7.1 points above the national average.
No major contaminant flags across New Hampshire cities. All cities meet EPA federal drinking water standards.
Our Recommendation
New Hampshire water is generally good quality. A carbon pitcher or faucet filter removes chlorine taste and provides extra protection. No major filtration investment is needed for most residents.
All 3 cities in New Hampshire meet EPA federal drinking water standards as of 2026. However, EPA standards set legal limits — not health goals. Many contaminants are detected at levels that are legal but may still pose long-term health risks according to independent health organizations like the EWG.
New Hampshire at a Glance
85Avg Purity Score
1Avg Hardness (GPG) Soft
0Cities with PFAS
0Cities with Hard Water
2.2Avg Lead (ppb)
30Avg TDS (ppm)
New Hampshire is 7.1 points above the US average of 77.9/100. Hardness is 5.3 GPG below the US average of 6.3 GPG.
Best & Worst Water in New Hampshire
Consistent Quality
All 3 cities score similarly
85/100
Score Distribution
How New Hampshire's 3 cities score on the PurityMap 0–100 scale:
Excellent (85–100)
3 cities
Good (70–84)
0 cities
Moderate (60–69)
0 cities
Poor (below 60)
0 cities
Largest Cities in New Hampshire — Water Quality
Water quality for the most populated cities. Click any city for details.
