D38/100
WEIR RIVER WATER SYSTEM — Water Quality Report 2026
Serving 45,339 people · Massachusetts
Water Source
Surface Water
County
—
System ID
MA4131000
Violations
32
Contaminant Test Results
4 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.10 mg/L | 1.30 mg/L | Over Limit |
PFOA | 0.006 µg/L | 0.004 µg/L | Over Limit |
chlorate | 220.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2021.
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 WEIR RIVER WATER SYSTEM
Is WEIR RIVER WATER SYSTEM water safe to drink?
WEIR RIVER WATER SYSTEM water receives a grade of D (38/100), which is considered poor. 2 contaminant(s) exceed EPA legal limits and 32 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WEIR RIVER WATER SYSTEM detected?
70 contaminants were tested in WEIR RIVER WATER SYSTEM's water. Notable contaminants include Copper (90th percentile), PFOA, Lead (90th percentile), chlorate. 2 exceed EPA legal limits (MCLs). 4 exceed EPA health goals (MCLGs).
Does WEIR RIVER WATER SYSTEM have any EPA violations?
Yes, WEIR RIVER WATER SYSTEM has 32 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, MCL, TT. 2 are health-based violations.
How many people does WEIR RIVER WATER SYSTEM serve?
WEIR RIVER WATER SYSTEM serves approximately 45,339 people, Massachusetts. The system provides water to 1 community: Hingham.
What type of water does WEIR RIVER WATER SYSTEM provide?
WEIR RIVER WATER SYSTEM 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 MA4131000.
How does WEIR RIVER WATER SYSTEM compare to other utilities in Massachusetts?
WEIR RIVER WATER SYSTEM scores 38/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Massachusetts state page for a full comparison of water systems.