B75/100
CTWC - PLAINFIELD SYSTEM — Water Quality Report 2026
Serving 1,713 people · Connecticut
Water Source
Groundwater
County
—
System ID
CT1090081
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.80 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 CTWC - PLAINFIELD SYSTEM
Is CTWC - PLAINFIELD SYSTEM water safe to drink?
CTWC - PLAINFIELD SYSTEM water receives a grade of B (75/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CTWC - PLAINFIELD SYSTEM detected?
2 contaminants were tested in CTWC - PLAINFIELD SYSTEM's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does CTWC - PLAINFIELD SYSTEM have any EPA violations?
Yes, CTWC - PLAINFIELD SYSTEM has 5 EPA violation(s) on record, with the most recent in 2008. Violation types include Other, MCL, MR. 3 are health-based violations.
How many people does CTWC - PLAINFIELD SYSTEM serve?
CTWC - PLAINFIELD SYSTEM serves approximately 1,713 people, Connecticut. The system provides water to 3 communities: Brooklyn, Killingly, Plainfield.
What type of water does CTWC - PLAINFIELD SYSTEM provide?
CTWC - PLAINFIELD SYSTEM sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CT1090081.
How does CTWC - PLAINFIELD SYSTEM compare to other utilities in Connecticut?
CTWC - PLAINFIELD SYSTEM scores 75/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Connecticut state page for a full comparison of water systems.