New Hampshire Water Quality Report
Tap water quality data for 1 cities in New Hampshire, updated 2026.
US average: 100 ppm
0 of 1 cities violation-free
1 cities tested
1 water systems tracked
Cleanest Tap Water in New Hampshire
Cities with the fewest water quality issues
Most Water Quality Issues in New Hampshire
Cities with the most violations and concerns
New Hampshire Tap Water: What You Need to Know
New Hampshire has 1 tracked water utilities serving approximately 124K residents. The average water hardness is 20 ppm (1.2 GPG), classified as Soft — below the national average of 100 ppm. Hardness ranges from 20 ppm in Manchester to 20 ppm in Manchester.
In the past 3 years, 1 of 1 cities in New Hampshire have recorded water quality violations, totaling 8 violations (4 health-based). All 1 tested cities have lead levels below the EPA action level of 15 ppb.
Frequently Asked Questions About New Hampshire Water
Is tap water safe to drink in New Hampshire?
Most tap water in New Hampshire meets EPA standards, but 1 cities have recorded violations in the past 3 years (4 health-based). We recommend checking your specific city's report on TapWater.org and considering a home water test.
How hard is the water in New Hampshire?
New Hampshire's average water hardness is 20 ppm (1.2 GPG), classified as Soft. This is below the national average of 100 ppm. Hardness varies significantly by city — use our Water Hardness Calculator to check your specific area.
Which city in New Hampshire has the cleanest tap water?
Based on EPA violation data, lead testing, and water quality metrics, Manchester ranks as having the cleanest tap water in New Hampshire. It has zero violations in the past 3 years and lead levels well below the EPA action level.
Which city in New Hampshire has the most water quality issues?
Manchester currently has the most water quality concerns in New Hampshire, with 8 violations in the past 3 years. Residents should check their city's detailed water quality report and consider using a certified water filter.
Where does New Hampshire get its water from?
The majority of New Hampshire's water systems (0%) use surface water as their primary source. Surface water comes from rivers, lakes, and reservoirs. Each city's specific source can vary — check individual city reports for details.
All 1 Cities
Sorted by population served