B77/100
DERRY WATER DEPT — Water Quality Report 2026
Serving 17,210 people · New Hampshire
Water Source
Purchased Surface Water
County
—
System ID
NH0611010
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOA | 0.004 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2004.
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 DERRY WATER DEPT
Is DERRY WATER DEPT water safe to drink?
DERRY WATER DEPT water receives a grade of B (77/100), which is considered good. Out of 69 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has DERRY WATER DEPT detected?
69 contaminants were tested in DERRY WATER DEPT's water. Notable contaminants include PFOA. 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does DERRY WATER DEPT have any EPA violations?
Yes, DERRY WATER DEPT has 3 EPA violation(s) on record, with the most recent in 2004. Violation types include MCL. 3 are health-based violations.
How many people does DERRY WATER DEPT serve?
DERRY WATER DEPT serves approximately 17,210 people, New Hampshire. The system provides water to 1 community: Derry.
What type of water does DERRY WATER DEPT provide?
DERRY WATER DEPT sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is NH0611010.
How does DERRY WATER DEPT compare to other utilities in New Hampshire?
DERRY WATER DEPT scores 77/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our New Hampshire state page for a full comparison of water systems.