F3/100
PETERBOROUGH WATER WORKS — Water Quality Report 2026
Serving 4,500 people · New Hampshire
Water Source
Groundwater
County
—
System ID
NH1871010
Violations
46
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.009 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – October 1, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – July 13, 2022Enforcement: Resolving — corrective action underway
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 PETERBOROUGH WATER WORKS
Is PETERBOROUGH WATER WORKS water safe to drink?
PETERBOROUGH WATER WORKS water receives a grade of F (3/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 46 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PETERBOROUGH WATER WORKS detected?
31 contaminants were tested in PETERBOROUGH WATER WORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does PETERBOROUGH WATER WORKS have any EPA violations?
Yes, PETERBOROUGH WATER WORKS has 46 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other, RPT. 12 are health-based violations.
How many people does PETERBOROUGH WATER WORKS serve?
PETERBOROUGH WATER WORKS serves approximately 4,500 people, New Hampshire. The system provides water to 1 community: Peterborough.
What type of water does PETERBOROUGH WATER WORKS provide?
PETERBOROUGH WATER WORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NH1871010.
How does PETERBOROUGH WATER WORKS compare to other utilities in New Hampshire?
PETERBOROUGH WATER WORKS scores 3/100 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.