Trempealeau Waterworks
EPA ID: WI6620332 · 1,888 people served · 1 ZIP code
Compared to the national average for mid-size utilities, Trempealeau Waterworks sits well above the baseline — five years of EPA monitoring show no violations, no MCL exceedances, and no enforcement actions for the full service territory of 1,888 people.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Trempealeau Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The Trempealeau Waterworks serves a community with a median household income of $76,232 and an estimated 3,788 residents across its service area.
💧 Where Does Your Water Come From?
Trempealeau Waterworks'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 Trempealeau County, Wisconsin 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 Wisconsin
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
Trempealeau Waterworks (EPA ID: WI6620332) is a community water system in Wisconsin that serves approximately 1,888 people from groundwater sources.
This system serves ZIP code 54661 in Trempealeau.
Average Home Safety Score: B (73/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 54661 | 0.00078 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate 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
- 54661 — Trempealeau
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Trempealeau Waterworks (WI6620332) on EPA.gov.
Frequently Asked Questions
Is Trempealeau Waterworks water safe to drink?
Based on EPA records, Trempealeau Waterworks has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Trempealeau Waterworks serve?
Trempealeau Waterworks serves approximately 1,888 people across 1 ZIP code in Wisconsin.
Where does Trempealeau Waterworks 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.