Silverdale Water District 16
EPA ID: WA5379300 · 35,163 people served · 5 ZIP codes
ZipCheckup's reading of EPA SDWIS for Silverdale Water District 16 (WA5379300): no EPA violations recorded in the last five years. Federal monitoring spanning five full years has produced zero violations at Silverdale Water District 16 - a clean record across every reporting cycle for a utility serving approximately 35,163 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Silverdale Water District 16 Source: EPA SDWIS service area boundaries.
Service area boundary - Grade A
Service Area Demographics
The Silverdale Water District 16 serves a community with a median household income of $106,902 and an estimated 117,536 residents across its service area. Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Silverdale Water District 16'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 80th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
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
Silverdale Water District 16 (EPA ID: WA5379300) is a community water system in Washington that serves approximately 35,163 people from groundwater sources.
This system provides water to 5 ZIP codes across 4 communities.
ZIP-Area Home Safety Context: A (97/100)
This is the average Home Safety Score for 1 of 5 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 |
|---|---|---|
| 0.002 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 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 Silverdale Water District 16 (WA5379300) on EPA.gov.
Frequently Asked Questions
Is Silverdale Water District 16 water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Silverdale Water District 16 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 Silverdale Water District 16 serve?
Silverdale Water District 16 serves approximately 35,163 people across 5 ZIP codes in Washington.
Where does Silverdale Water District 16 get its water?
The primary water source is groundwater.
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.). Silverdale Water District 16, WA: Serves 35K People. https://zipcheckup.com/water-system/wa5379300/
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