A94/100
PENNICHUCK WATER WORKS — Water Quality Report 2026
Serving 89,073 people · New Hampshire
Water Source
Surface Water
County
—
System ID
NH1621010
Violations
2
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 PENNICHUCK WATER WORKS
Is PENNICHUCK WATER WORKS water safe to drink?
PENNICHUCK WATER WORKS water receives a grade of A (94/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has PENNICHUCK WATER WORKS detected?
76 contaminants were tested in PENNICHUCK WATER WORKS's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does PENNICHUCK WATER WORKS have any EPA violations?
Yes, PENNICHUCK WATER WORKS has 2 EPA violation(s) on record, with the most recent in 2008. Violation types include MR, TT. 1 are health-based violations.
How many people does PENNICHUCK WATER WORKS serve?
PENNICHUCK WATER WORKS serves approximately 89,073 people, New Hampshire. The system provides water to 1 community: Nashua.
What type of water does PENNICHUCK WATER WORKS provide?
PENNICHUCK 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 NH1621010.
How does PENNICHUCK WATER WORKS compare to other utilities in New Hampshire?
PENNICHUCK WATER WORKS scores 94/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our New Hampshire state page for a full comparison of water systems.