A84/100
HARWICH WATER DEPARTMENT — Water Quality Report 2026
Serving 39,144 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4126000
Violations
4
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2000.
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 HARWICH WATER DEPARTMENT
Is HARWICH WATER DEPARTMENT water safe to drink?
HARWICH WATER DEPARTMENT water receives a grade of A (84/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has HARWICH WATER DEPARTMENT detected?
66 contaminants were tested in HARWICH WATER DEPARTMENT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does HARWICH WATER DEPARTMENT have any EPA violations?
Yes, HARWICH WATER DEPARTMENT has 4 EPA violation(s) on record, with the most recent in 2000. Violation types include Other, MCL. 3 are health-based violations.
How many people does HARWICH WATER DEPARTMENT serve?
HARWICH WATER DEPARTMENT serves approximately 39,144 people, Massachusetts. The system provides water to 1 community: Harwich.
What type of water does HARWICH WATER DEPARTMENT provide?
HARWICH WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4126000.
How does HARWICH WATER DEPARTMENT compare to other utilities in Massachusetts?
HARWICH WATER DEPARTMENT scores 84/100 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.