F0/100
SOMERSWORTH WATER WORKS — Water Quality Report 2026
Serving 12,000 people · New Hampshire
Water Source
Surface Water
County
—
System ID
NH2151010
Violations
37
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 380.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2007.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About SOMERSWORTH WATER WORKS
Is SOMERSWORTH WATER WORKS water safe to drink?
SOMERSWORTH WATER WORKS water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 37 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SOMERSWORTH WATER WORKS detected?
69 contaminants were tested in SOMERSWORTH WATER WORKS's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SOMERSWORTH WATER WORKS have any EPA violations?
Yes, SOMERSWORTH WATER WORKS has 37 EPA violation(s) on record, with the most recent in 2007. Violation types include Other, MCL, TT. 35 are health-based violations.
How many people does SOMERSWORTH WATER WORKS serve?
SOMERSWORTH WATER WORKS serves approximately 12,000 people, New Hampshire. The system provides water to 1 community: Somersworth.
What type of water does SOMERSWORTH WATER WORKS provide?
SOMERSWORTH WATER WORKS sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is NH2151010.
How does SOMERSWORTH WATER WORKS compare to other utilities in New Hampshire?
SOMERSWORTH WATER WORKS scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our New Hampshire state page for a full comparison of water systems.