Poynette Waterworks
EPA ID: WI1110037 · 2,520 people served · 1 ZIP code
Five-year compliance data for Poynette Waterworks includes 7 violations the EPA has not yet marked resolved — those open findings are part of the utility's current enforcement profile, covering a service population of approximately 2,520 residents across the area it supplies.
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 (2024) to 4 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Poynette Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Poynette Waterworks serves a community with a median household income of $95,802 and an estimated 5,909 residents across its service area. Approximately 63% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Poynette 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 3% of homes in Columbia 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
Detected Contaminants
How Poynette Waterworks compares to EPA limits
What This Means For You
Atrazine at 4 mg/L exceeds the EPA maximum of 0.003 mg/L. Endocrine disruption, cardiovascular & reproductive effects. Consider granular activated carbon (GAC) filtration.
Lead and Copper Rule at 4 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Atrazine was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →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
Poynette Waterworks (EPA ID: WI1110037) is a community water system in Wisconsin that serves approximately 2,520 people from groundwater sources.
This system serves ZIP code 53955 in Poynette.
Average Home Safety Score: C (61/100)
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 | Atrazine | Health-based | Unresolved |
| April 1, 2025 | Atrazine | Health-based | Unresolved |
| January 1, 2025 | Atrazine | Health-based | Unresolved |
| December 1, 2024 | Contaminant 0700 | Health-based | Resolved |
| December 1, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unresolved |
| October 17, 2024 | Lead and Copper Rule | Monitoring | Unresolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| May 1, 2024 | Consumer Confidence Report Rule | Monitoring | Resolved |
| October 1, 2023 | Lead and Copper Rule | Monitoring | Unresolved |
| July 1, 2023 | Atrazine | Monitoring | Resolved |
| April 27, 2023 | Total Coliform | Monitoring | Resolved |
| April 27, 2023 | Lead and Copper Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Atrazine | Organic | 4 | Yes |
| Lead and Copper Rule | Treatment Failure | 4 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Surface Water Treatment Rule | Treatment Failure | 2 | No |
| Consumer Confidence Report Rule | Reporting Failure | 2 | No |
| Total Coliform | Microbiological | 1 | No |
| Contaminant 0700 | Other Violation | 1 | Yes |
Health Risk Details
Atrazine (EPA limit: 0.003 mg/L)
Endocrine disruption, cardiovascular & reproductive effects At-risk groups: pregnant women, people in agricultural areas, rural communities in the Midwest corn belt.
Removal methods: granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 53955 | 0.00305 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
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WI or modeled from parcel and building-footprint data.
- 53955 — Poynette
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Poynette Waterworks (WI1110037) on EPA.gov.
Frequently Asked Questions
Is Poynette Waterworks water safe to drink?
Poynette Waterworks has recorded 5 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Poynette Waterworks serve?
Poynette Waterworks serves approximately 2,520 people across 1 ZIP code in Wisconsin.
Where does Poynette 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.
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
Poynette Waterworks (EPA ID: WI1110037) — request the latest Consumer Confidence Report or ask about specific contaminants.