Steptoe Water/sewer District
EPA ID: WA5324881 · 210 people served · 1 ZIP code
Throughout five consecutive years of federal water monitoring, Steptoe Water/sewer District recorded zero violations — solid performance for a utility serving 210 people.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Steptoe Water/sewer District Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Steptoe Water/sewer District serves a community with a median household income of $66,333 and an estimated 4,049 residents across its service area. Approximately 78% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Steptoe Water/sewer District'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 Whitman 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
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
Steptoe Water/sewer District (EPA ID: WA5324881) is a community water system in Washington that serves approximately 210 people from groundwater sources.
This system serves ZIP code 99111 in Colfax.
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
- 99111 — Colfax
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Steptoe Water/sewer District (WA5324881) on EPA.gov.
Frequently Asked Questions
Is Steptoe Water/sewer District water safe to drink?
Based on EPA records, Steptoe Water/sewer District has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Steptoe Water/sewer District serve?
Steptoe Water/sewer District serves approximately 210 people across 1 ZIP code in Washington.
Where does Steptoe Water/sewer District get its water?
The primary water source is groundwater.
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.