Scwa, North Stonington Division (nst)
EPA ID: CT1020021 · 1,860 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Scwa, North Stonington Division (nst) (CT1020021): 1 violation recorded with unresolved status in the SDWIS data used. Federal data lists 1 violation as unresolved at Scwa, North Stonington Division (nst) - roughly 1,860 residents in the service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Scwa, North Stonington Division (nst) Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Scwa, North Stonington Division (nst) have a median household income of $115,069 and about 5,154 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 70% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Scwa, North Stonington Division (nst)'s water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Connecticut
System Overview
Scwa, North Stonington Division (nst) (EPA ID: CT1020021) is a community water system in Connecticut that serves approximately 1,860 people from groundwater sources.
This system serves ZIP code 06359 in North Stonington.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 0 archived, 0 addressed, and 1 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2024 | Lead and Copper Rule | Non-health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Lead and Copper Rule | Monitoring & Reporting | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0019 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
1 of 1 ZIP records with known zones is in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CT or modeled from parcel and building-footprint data.
- 06359 - North Stonington
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Scwa, North Stonington Division (nst) (CT1020021) on EPA.gov.
Frequently Asked Questions
Is Scwa, North Stonington Division (nst) water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current noncompliance record and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Scwa, North Stonington Division (nst) serve?
Scwa, North Stonington Division (nst) serves approximately 1,860 people across 1 ZIP code in Connecticut.
Where does Scwa, North Stonington Division (nst) get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Scwa, North Stonington Division (nst) (CT): 1 EPA Violation. https://zipcheckup.com/water-system/ct1020021/
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author = {{ZipCheckup}},
title = {{Scwa, North Stonington Division (nst) (CT): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ct1020021/}
}
What You Can Do
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Scwa, North Stonington Division (nst) (EPA ID: CT1020021) - request the latest Consumer Confidence Report or ask about specific contaminants.