Salkum Water Supply
EPA ID: WA5375550 · 103 people served · 2 ZIP codes
Not yet resolved: 4 EPA violations at Salkum Water Supply, affecting about 103 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Salkum Water Supply Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Salkum Water Supply serves a community with a median household income of $61,002 and an estimated 1,140 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.
Environmental Justice Note: 40% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Salkum Water Supply'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.
About 1% of homes in Lewis County, Washington rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Salkum Water Supply compares to EPA limits
What This Means For You
Total Organic Carbon at 3 mg/L exceeds the EPA maximum of mg/L.
Contaminant 2045 at 1 mg/L exceeds the EPA maximum of mg/L.
Contaminant 2440 at 1 mg/L exceeds the EPA maximum of mg/L.
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
SALKUM WATER SUPPLY (EPA ID: WA5375550) is a community water system in Washington that serves approximately 103 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: C (64/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2024 | Contaminant 2045 | Monitoring | Unresolved |
| April 1, 2024 | Total Organic Carbon | Monitoring | Resolved |
| October 1, 2023 | Total Organic Carbon | Monitoring | Unresolved |
| July 1, 2023 | Total Organic Carbon | Monitoring | Unresolved |
| April 1, 2023 | Contaminant 2440 | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Total Organic Carbon | Disinfection Byproducts | 3 | No |
| Contaminant 2045 | Other Violation | 1 | No |
| Contaminant 2440 | Other Violation | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 98582 | 0.0859 mg/L | Yes | N/A |
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Salkum Water Supply (WA5375550) on EPA.gov.
Frequently Asked Questions
Is Salkum Water Supply water safe to drink?
Salkum Water Supply has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does Salkum Water Supply serve?
Salkum Water Supply serves approximately 103 people across 2 ZIP codes in Washington.
Where does Salkum Water Supply get its water?
The primary water source is groundwater.
Frequently Asked Questions
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
Salkum Water Supply (EPA ID: WA5375550) — request the latest Consumer Confidence Report or ask about specific contaminants.