Washington County Water Company
EPA ID: IL1895600 · 11,374 people served · 1 ZIP code
Over five tracked years, Washington County Water Company has stayed completely violation-free for its 11,374 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 2 (2022) to 1 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Washington County Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Washington County Water Company serves a community with a median household income of $68,931 and an estimated 4,834 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Washington County Water Company'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.
About 0% of homes in Washington County, Illinois rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 1 detection recorded.
Comparable Water Systems
Similar-sized systems in Illinois
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
Washington County Water Company (EPA ID: IL1895600) is a community water system in Illinois that serves approximately 11,374 people from surface water sources.
This system serves ZIP code 62263 in Nashville.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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 note: This system is not yet in the EPA Community Water System Service Area Boundaries v3 dataset, so its service area is derived from SDWIS registry metadata (city of record). Given the system serves 11,374 people, the real service area very likely spans additional ZIP codes that aren't reflected below.
- 62263 — Nashville
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Washington County Water Company (IL1895600) on EPA.gov.
Frequently Asked Questions
Is Washington County Water Company water safe to drink?
Based on EPA records, Washington County Water Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Washington County Water Company serve?
Washington County Water Company serves approximately 11,374 people across 1 ZIP code in Illinois.
Where does Washington County Water Company get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
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 →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.