A100/100
MATTAPOISETT RIVER VALLEY W.D. — Water Quality Report 2026
Serving 29,600 people · Massachusetts
Water Source
Purchased Groundwater
County
—
System ID
MA4173001
Violations
0
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 MATTAPOISETT RIVER VALLEY W.D.
Is MATTAPOISETT RIVER VALLEY W.D. water safe to drink?
MATTAPOISETT RIVER VALLEY W.D. water receives a grade of A (100/100), which is considered excellent. Out of 45 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has MATTAPOISETT RIVER VALLEY W.D. detected?
45 contaminants were tested in MATTAPOISETT RIVER VALLEY W.D.'s water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does MATTAPOISETT RIVER VALLEY W.D. have any EPA violations?
No, MATTAPOISETT RIVER VALLEY W.D. has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does MATTAPOISETT RIVER VALLEY W.D. serve?
MATTAPOISETT RIVER VALLEY W.D. serves approximately 29,600 people, Massachusetts. The system provides water to 1 community: Mattapoisett.
What type of water does MATTAPOISETT RIVER VALLEY W.D. provide?
MATTAPOISETT RIVER VALLEY W.D. sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4173001.
How does MATTAPOISETT RIVER VALLEY W.D. compare to other utilities in Massachusetts?
MATTAPOISETT RIVER VALLEY W.D. scores 100/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Massachusetts state page for a full comparison of water systems.