Wilton Water Supply
EPA ID: IA7078026 · 2,924 people served · 6 ZIP codes
ZipCheckup's reading of EPA records for Wilton Water Supply (IA7078026): no drinking-water violations recorded since 2021. No violations appear in the federal EPA file for Wilton Water Supply, which supplies 2,924 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Wilton Water Supply Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: C
Demographics of ZIP Codes Served
The ZIP codes associated with Wilton Water Supply have a median household income of $75,286 and about 41,146 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 80% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Wilton Water Supply'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.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 7 detections recorded. 2 detections are above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
Comparable Water Systems
Similar-sized systems in Iowa
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
Wilton Water Supply (EPA ID: IA7078026) is a community water system in Iowa that serves approximately 2,924 people from groundwater sources.
This system provides water to 6 ZIP codes across 6 communities.
ZIP-Area Home Safety Context: C (67/100)
This is the average Home Safety Score for 1 of 6 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 |
|---|---|---|
| 0.006 mg/L | No | 2023-12-31 |
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
6 of 6 ZIP records with known zones are 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 IA or modeled from parcel and building-footprint data.
- 52720 - Atalissa
- 52760 - Moscow
- 52761 - Muscatine
- 52766 - Nichols
- 52776 - West Liberty
- 52778 - Wilton
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Wilton Water Supply (IA7078026) on EPA.gov.
Frequently Asked Questions
Is Wilton Water Supply water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Wilton 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 Wilton Water Supply serve?
Wilton Water Supply serves approximately 2,924 people across 6 ZIP codes in Iowa.
Where does Wilton Water Supply get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Wilton Water Supply Water Quality Report, IA. https://zipcheckup.com/water-system/ia7078026/
@misc{zipcheckup-water-system-ia7078026,
author = {{ZipCheckup}},
title = {{Wilton Water Supply Water Quality Report, IA}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ia7078026/}
}
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
Wilton Water Supply (EPA ID: IA7078026) - request the latest Consumer Confidence Report or ask about specific contaminants.