Montville Water Supply
EPA ID: CT0864011 · 1,300 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Montville Water Supply (CT0864011): no EPA violations recorded in the last five years. Federal monitoring records confirm Montville Water Supply has operated without any EPA violations for the full five-year window - covering every contaminant category and reporting cycle across a service area of approximately 1,300 residents, with no gaps in the compliance record.
Data: EPA SDWIS
Service Area Map
Coverage area for Montville Water Supply Source: EPA SDWIS service area boundaries.
Service area boundary - Grade D
Service Area Demographics
The Montville Water Supply serves a community with a median household income of $92,956 and an estimated 17,623 residents across its service area. Approximately 67% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Montville Water Supply's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 5 detections recorded. 3 exceed federal EPA limits (4 ppt for PFOA/PFOS). 1 exceeds state limits.
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
Montville Water Supply (EPA ID: CT0864011) is a community water system in Connecticut that serves approximately 1,300 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
ZIP-Area Home Safety Context: D (41/100)
This is the average Home Safety Score for 1 of 2 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
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
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Montville Water Supply (CT0864011) on EPA.gov.
Frequently Asked Questions
Is Montville Water Supply water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Montville Water Supply in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Montville Water Supply serve?
Montville Water Supply serves approximately 1,300 people across 2 ZIP codes in Connecticut.
Where does Montville Water Supply get its water?
The primary water source is surface water.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Montville Water Supply Water Quality Report, CT. https://zipcheckup.com/water-system/ct0864011/
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title = {{Montville Water Supply Water Quality Report, CT}},
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url = {https://zipcheckup.com/water-system/ct0864011/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Montville Water Supply (EPA ID: CT0864011) - request the latest Consumer Confidence Report or ask about specific contaminants.