D25/100
Weston Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 16,000 residents · Wisconsin
What's In Weston's Tap Water?
66
Contaminants Tested
2
Exceed EPA Limits
2
Above EPA Goals
4 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.009 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.006 µg/L | 0.004 µg/L | Over Limit |
chlorate | 707.52 µg/L | — | Above Goal |
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – June 30, 2023Enforcement: Resolving — corrective action underway
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
WESTON MUNICIPAL UTILITIES
Population Served
16,000
Water Source
Groundwater
System ID
WI7370163
Frequently Asked Questions About Weston Water
Is Weston tap water safe to drink?
Weston, Wisconsin tap water receives a grade of D (25/100), which is considered poor. 2 contaminant(s) exceed EPA maximum contaminant levels and 53 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Weston's water?
Of the 66 contaminants tested in Weston's water supply, the most notable include PFOS, PFOA, Lead (90th percentile), chlorate. 2 contaminant(s) exceed EPA legal limits (MCLs). 4 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Weston have any water quality violations?
Yes, Weston has 53 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other. None of these are classified as health-based violations.
Do I need a water filter in Weston?
Based on EPA data, using a water filter in Weston is recommended. 2 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Weston's tap water come from?
Weston's drinking water is sourced from groundwater and supplied by WESTON MUNICIPAL UTILITIES. The system serves approximately 16,000 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Weston'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. Weston'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 Weston's water compare to other cities in Wisconsin?
Weston's water quality score of 25/100 earns a grade of D, which is considered poor. 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 Weston's water quality?
If you have concerns about Weston'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 (WESTON MUNICIPAL UTILITIES) 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.