C58/100
Hazel Green Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 1,193 residents · Wisconsin
What's In Hazel Green's Tap Water?
2
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.39 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – November 9, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
TIER 2Resolved
Consumer confidence report — content deficiency
When: December 29, 2022 – March 12, 2025Rule: Ground Water RuleEnforcement: 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
HAZEL GREEN WATERWORKS
Population Served
1,193
Water Source
Groundwater
System ID
WI1220102
Frequently Asked Questions About Hazel Green Water
Is Hazel Green tap water safe to drink?
Hazel Green, Wisconsin tap water receives a grade of C (58/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 15 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Hazel Green's water?
Of the 2 contaminants tested in Hazel Green's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Hazel Green have any water quality violations?
Yes, Hazel Green has 15 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, TT. 4 of these are health-based violations, which are the most serious category.
Do I need a water filter in Hazel Green?
Based on EPA data, using a water filter in Hazel Green is recommended. 1 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 Hazel Green's tap water come from?
Hazel Green's drinking water is sourced from groundwater and supplied by HAZEL GREEN WATERWORKS. The system serves approximately 1,193 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Hazel Green'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. Hazel Green'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 Hazel Green's water compare to other cities in Wisconsin?
Hazel Green's water quality score of 58/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Wisconsin state page to see how all cities in the state compare.
What should I do if I'm concerned about Hazel Green's water quality?
If you have concerns about Hazel Green'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 (HAZEL GREEN 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.