St. Thomas More School-main System
EPA ID: CT0861251 · 270 people served · 1 ZIP code
Federal monitoring spanning five full years has produced zero violations at St. Thomas More School-main System — a clean record across every reporting cycle for a utility serving approximately 270 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 1 (2023) to 1 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for St. Thomas More School-main System Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The St. Thomas More School-main System serves a community with a median household income of $100,891 and an estimated 7,547 residents across its service area. Approximately 60% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
St. Thomas More School-main System's water is pumped from underground aquifers. 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
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
St. Thomas More School-main System (EPA ID: CT0861251) is a community water system in Connecticut that serves approximately 270 people from groundwater sources.
This system serves ZIP code 06370 in Oakdale.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
- 06370 — Oakdale
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for St. Thomas More School-main System (CT0861251) on EPA.gov.
Frequently Asked Questions
Is St. Thomas More School-main System water safe to drink?
Based on EPA records, St. Thomas More School-main System has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does St. Thomas More School-main System serve?
St. Thomas More School-main System serves approximately 270 people across 1 ZIP code in Connecticut.
Where does St. Thomas More School-main System get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.