B68/100
SCWA, NORTH STONINGTON DIVISION (NST) — Water Quality Report 2026
Serving 1,860 people · Connecticut
Water Source
Groundwater
County
—
System ID
CT1020021
Violations
9
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.09 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 SCWA, NORTH STONINGTON DIVISION (NST)
Is SCWA, NORTH STONINGTON DIVISION (NST) water safe to drink?
SCWA, NORTH STONINGTON DIVISION (NST) water receives a grade of B (68/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SCWA, NORTH STONINGTON DIVISION (NST) detected?
2 contaminants were tested in SCWA, NORTH STONINGTON DIVISION (NST)'s water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does SCWA, NORTH STONINGTON DIVISION (NST) have any EPA violations?
Yes, SCWA, NORTH STONINGTON DIVISION (NST) has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, RPT, MCL. 3 are health-based violations.
How many people does SCWA, NORTH STONINGTON DIVISION (NST) serve?
SCWA, NORTH STONINGTON DIVISION (NST) serves approximately 1,860 people, Connecticut. The system provides water to 1 community: North Stonington.
What type of water does SCWA, NORTH STONINGTON DIVISION (NST) provide?
SCWA, NORTH STONINGTON DIVISION (NST) sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CT1020021.
How does SCWA, NORTH STONINGTON DIVISION (NST) compare to other utilities in Connecticut?
SCWA, NORTH STONINGTON DIVISION (NST) scores 68/100 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.