Norwalk Water Supply
EPA ID: IA9164078 · 14,334 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Norwalk Water Supply (IA9164078): no EPA violations recorded in the last five years. Federal monitoring spanning five full years has produced zero violations at Norwalk Water Supply - a clean record across every reporting cycle for a utility serving approximately 14,334 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Norwalk Water Supply Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Norwalk Water Supply serves a community with a median household income of $113,956 and an estimated 18,549 residents across its service area.
🌊 Where Does Your Water Come From?
Norwalk 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.
Infrastructure Risk
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
Norwalk Water Supply (EPA ID: IA9164078) is a community water system in Iowa that serves approximately 14,334 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
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 IA 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 Norwalk Water Supply (IA9164078) on EPA.gov.
Frequently Asked Questions
Is Norwalk Water Supply water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Norwalk 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 Norwalk Water Supply serve?
Norwalk Water Supply serves approximately 14,334 people across 2 ZIP codes in Iowa.
Where does Norwalk Water Supply get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Norwalk Water Supply, IA: Serves 14K People. https://zipcheckup.com/water-system/ia9164078/
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