Winthrop Town of
EPA ID: WA5397750 · 1,350 people served · 2 ZIP codes
Right now, Winthrop Town of shows 1 EPA violation marked active and unresolved — the provider continues to supply approximately 1,350 residents while each finding awaits closure.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Winthrop Town of Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Winthrop Town of serves a community with a median household income of $80,765 and an estimated 3,327 residents across its service area.
Environmental Justice Note: 90% 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?
Winthrop Town of'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 2% of homes in Okanogan County, Washington rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Winthrop Town of compares to EPA limits
What This Means For You
Lead at 1 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
Consumer Confidence Report Rule at 5 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →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
WINTHROP TOWN OF (EPA ID: WA5397750) is a community water system in Washington that serves approximately 1,350 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: C (59/100)
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, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| December 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| August 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| June 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| January 1, 2024 | Lead | Monitoring | Resolved |
| January 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 5 | No |
| Surface Water Treatment Rule | Treatment Failure | 2 | No |
| Lead | Inorganic | 1 | No |
| Stage 1 DBP Rule | Treatment Failure | 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 |
|---|---|---|---|
| 98862 | 0.0012 mg/L | No | N/A |
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Winthrop Town of (WA5397750) on EPA.gov.
Frequently Asked Questions
Is Winthrop Town of water safe to drink?
Winthrop Town of has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does Winthrop Town of serve?
Winthrop Town of serves approximately 1,350 people across 2 ZIP codes in Washington.
Where does Winthrop Town of 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
Winthrop Town of (EPA ID: WA5397750) — request the latest Consumer Confidence Report or ask about specific contaminants.