F11/100
Ashwaubenon Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 17,730 residents · Wisconsin
What's In Ashwaubenon's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
ASHWAUBENON WATERWORKS
Population Served
17,730
Water Source
Purchased Surface Water
System ID
WI4050456
Frequently Asked Questions About Ashwaubenon Water
Is Ashwaubenon tap water safe to drink?
Ashwaubenon, Wisconsin tap water receives a grade of F (11/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 18 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Ashwaubenon's water?
Of the 69 contaminants tested in Ashwaubenon's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Ashwaubenon have any water quality violations?
Yes, Ashwaubenon has 18 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, MCL. 17 of these are health-based violations, which are the most serious category.
Do I need a water filter in Ashwaubenon?
Ashwaubenon water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Ashwaubenon's tap water come from?
Ashwaubenon's drinking water is sourced from purchased surface water and supplied by ASHWAUBENON WATERWORKS. The system serves approximately 17,730 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Ashwaubenon's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Ashwaubenon's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Ashwaubenon's water compare to other cities in Wisconsin?
Ashwaubenon's water quality score of 11/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Wisconsin state page to see how all cities in the state compare.
What should I do if I'm concerned about Ashwaubenon's water quality?
If you have concerns about Ashwaubenon's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (ASHWAUBENON WATERWORKS) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.