City of Duvall
EPA ID: WA5320750 · 11,050 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for City of Duvall (WA5320750): no EPA violations recorded in the last five years. EPA monitoring data for City of Duvall shows an unblemished five-year compliance history - no violations of any kind have been recorded for this utility, which supplies water to approximately 11,050 people, covering every reporting cycle without a single MCL exceedance or monitoring lapse.
Data: EPA SDWIS
Service Area Map
Coverage area for City of Duvall Source: EPA SDWIS service area boundaries.
Service area boundary - Grade A
Service Area Demographics
The City of Duvall serves a community with a median household income of $156,842 and an estimated 19,393 residents across its service area.
🌊 Where Does Your Water Come From?
City of Duvall'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 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Washington
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
City of Duvall (EPA ID: WA5320750) is a community water system in Washington that serves approximately 11,050 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
ZIP-Area Home Safety Context: A (85/100)
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
No reported lead measurement appears for this PWSID in the accepted LCR snapshot. Absence of a reported measurement is not a measured zero.
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 3 (Low Risk)
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 WA 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 City of Duvall (WA5320750) on EPA.gov.
Frequently Asked Questions
Is City of Duvall water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for City of Duvall 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 City of Duvall serve?
City of Duvall serves approximately 11,050 people across 2 ZIP codes in Washington.
Where does City of Duvall 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.). City of Duvall, WA: Serves 11K People. https://zipcheckup.com/water-system/wa5320750/
@misc{zipcheckup-water-system-wa5320750,
author = {{ZipCheckup}},
title = {{City of Duvall, WA: Serves 11K People}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5320750/}
}