C41/100
DENNIS WATER DISTRICT — Water Quality Report 2026
Serving 65,000 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4075000
Violations
39
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 DENNIS WATER DISTRICT
Is DENNIS WATER DISTRICT water safe to drink?
DENNIS WATER DISTRICT water receives a grade of C (41/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 39 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DENNIS WATER DISTRICT detected?
66 contaminants were tested in DENNIS WATER DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does DENNIS WATER DISTRICT have any EPA violations?
Yes, DENNIS WATER DISTRICT has 39 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, MCL. 5 are health-based violations.
How many people does DENNIS WATER DISTRICT serve?
DENNIS WATER DISTRICT serves approximately 65,000 people, Massachusetts. The system provides water to 1 community: Dennis.
What type of water does DENNIS WATER DISTRICT provide?
DENNIS WATER DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4075000.
How does DENNIS WATER DISTRICT compare to other utilities in Massachusetts?
DENNIS WATER DISTRICT scores 41/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Massachusetts state page for a full comparison of water systems.