F0/100
AQUARION-MARLBOROUGH — Water Quality Report 2026
Serving 1,348 people · Connecticut
Water Source
Groundwater
County
—
System ID
CT0798013
Violations
212
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2019.
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 AQUARION-MARLBOROUGH
Is AQUARION-MARLBOROUGH water safe to drink?
AQUARION-MARLBOROUGH water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 212 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has AQUARION-MARLBOROUGH detected?
1 contaminants were tested in AQUARION-MARLBOROUGH's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does AQUARION-MARLBOROUGH have any EPA violations?
Yes, AQUARION-MARLBOROUGH has 212 EPA violation(s) on record, with the most recent in 2019. Violation types include MR, MCL, Other. 2 are health-based violations.
How many people does AQUARION-MARLBOROUGH serve?
AQUARION-MARLBOROUGH serves approximately 1,348 people, Connecticut. The system provides water to 1 community: Marlborough.
What type of water does AQUARION-MARLBOROUGH provide?
AQUARION-MARLBOROUGH sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CT0798013.
How does AQUARION-MARLBOROUGH compare to other utilities in Connecticut?
AQUARION-MARLBOROUGH scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Connecticut state page for a full comparison of water systems.