Water Quality in Pewaukee, WI: 142 Violations - Grade N/A
5 water systems · 1 directly mapped ZIP records
Available EPA records report 142 violations across 1 directly mapped ZIP records with known counts for Pewaukee. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Pewaukee
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 53072 | 142 | 95 | View report → |
Violation Trend
EPA violations recorded for water systems serving Pewaukee.
| Year | Total violations | Health-based |
|---|---|---|
| 2021 | 10 | 10 |
| 2022 | 12 | 12 |
| 2023 | 11 | 11 |
| 2024 | 9 | 9 |
| 2025 | 10 | 10 |
| 2026 | 3 | 3 |
Water Quality Overview
Pewaukee, Wisconsin has directly mapped EPA water-system data for 1 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 142 violations, including 95 health-based violations across 1 directly mapped ZIP record with reported counts.
Lead Levels
The average 90th percentile lead level across Pewaukee water systems is 0.0136 mg/L - within EPA limits. No exceedances appear among the 1 ZIP records with known lead status.
Water Systems Serving Pewaukee
Pewaukee is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 26,652 people across 1 ZIP code.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Pewaukee. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Pewaukee
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Pewaukee Water Systems
The following contaminants have been detected or caused violations across Pewaukee's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Gross Alpha | Radionuclides | 15 pCi/L | 53 | 1 | Yes |
| Gross Beta | Radionuclides | 50 pCi/L | 42 | 1 | Yes |
| Lead and Copper Rule | Treatment Technique | N/A | 37 | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | N/A | 4 | 1 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 2 | 1 | No |
| Lead | Inorganic | 0.015 mg/L | 1 | 1 | No |
| Atrazine | Organic | 0.003 mg/L | 1 | 1 | Yes |
| Radium-228 | Radionuclides | 5 pCi/L | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Pewaukee:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 10 | 10 |
| 2022 | 12 | 12 |
| 2023 | 11 | 11 |
| 2024 | 9 | 9 |
| 2025 | 10 | 10 |
| 2026 | 3 | 3 |
Violations have decreased from 10 in 2021 to 3 in 2026, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 9 enforcement actions against water systems serving Pewaukee. Recent actions:
| Date | Action Type |
|---|---|
| 2026-02-25 | State Filed Suit |
| 2026-02-25 | State Informal Action |
| 2025-12-22 | State Informal Action |
| 2025-12-09 | State Informal Action |
| 2025-11-20 | State Filed Judgment |
| 2025-11-20 | State Filed Suit |
| 2025-11-20 | State Informal Action |
| 2025-11-20 | State Informal Action |
| 2025-11-20 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-02-25.
Pewaukee vs. Nearby Wisconsin Cities
How Pewaukee's water quality compares to similar cities in Wisconsin:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Pewaukee | 1 | 142 | 5 | 26,652 |
| Marshfield | 1 | 3 | 2 | 26,368 |
| Menasha | 1 | 10 | 5 | 27,127 |
| Muskego | 1 | 7 | 5 | 26,142 |
Common Questions About Pewaukee Water
These are the most common questions residents search for about water quality in Pewaukee, Wisconsin:
Is Pewaukee water hard or soft? Water hardness varies by source. Pewaukee's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Pewaukee tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 95 health-based violations; check the affected utility record and consider certified testing.
What is the best water filter for Pewaukee? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Pewaukee vs. Wisconsin Average
Understanding how Pewaukee compares to the broader Wisconsin average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within Pewaukee.
ZIP Codes in Pewaukee
Pewaukee spans 1 ZIP code. EPA water-system coverage is available for 1 directly mapped ZIP code. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Source reporting periods vary. See each cited source for its publication schedule.