City of Willis
EPA ID: KS2001311 · 38 people served · 1 ZIP code
Throughout five consecutive years of federal water monitoring, City of Willis recorded zero violations — solid performance for a utility serving 38 people.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for City of Willis Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The City of Willis serves a community with a median household income of $73,304 and an estimated 4,738 residents across its service area. Approximately 76% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% 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?
City of Willis'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 Brown County, Kansas rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Kansas
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 Willis, (EPA ID: KS2001311) is a community water system in Kansas that serves approximately 38 people from groundwater sources.
This system serves ZIP code 66434 in Hiawatha.
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
- 66434 — Hiawatha
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Willis (KS2001311) on EPA.gov.
Frequently Asked Questions
Is City of Willis water safe to drink?
Based on EPA records, City of Willis has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does City of Willis serve?
City of Willis serves approximately 38 people across 1 ZIP code in Kansas.
Where does City of Willis get its water?
The primary water source is groundwater.