C52/100
AQUARION-PLAINVILLE REGIONAL — Water Quality Report 2026
Serving 18,231 people · Connecticut
Water Source
Groundwater
County
—
System ID
CT1100011
Violations
32
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.006 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.005 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: August 10, 2021 – July 6, 2021Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – July 6, 2021Enforcement: Resolving — corrective action underway
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-PLAINVILLE REGIONAL
Is AQUARION-PLAINVILLE REGIONAL water safe to drink?
AQUARION-PLAINVILLE REGIONAL water receives a grade of C (52/100), which is considered fair. 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 AQUARION-PLAINVILLE REGIONAL detected?
66 contaminants were tested in AQUARION-PLAINVILLE REGIONAL's water. Notable contaminants include PFOS, PFOA. 2 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does AQUARION-PLAINVILLE REGIONAL have any EPA violations?
Yes, AQUARION-PLAINVILLE REGIONAL has 32 EPA violation(s) on record, with the most recent in 2021. Violation types include Other, MR.
How many people does AQUARION-PLAINVILLE REGIONAL serve?
AQUARION-PLAINVILLE REGIONAL serves approximately 18,231 people, Connecticut. The system provides water to 4 communities: Bristol, Farmington, Plainville, Southington.
What type of water does AQUARION-PLAINVILLE REGIONAL provide?
AQUARION-PLAINVILLE REGIONAL sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CT1100011.
How does AQUARION-PLAINVILLE REGIONAL compare to other utilities in Connecticut?
AQUARION-PLAINVILLE REGIONAL scores 52/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Connecticut state page for a full comparison of water systems.