A94/100
Glendale Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 12,883 residents · Wisconsin
What's In Glendale'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) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Unresolved
Other violation
When: October 31, 2023Rule: Consumer Confidence RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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
GLENDALE WATERWORKS
Population Served
12,883
Water Source
Purchased Surface Water
System ID
WI2410168
Frequently Asked Questions About Glendale Water
Is Glendale tap water safe to drink?
Glendale, Wisconsin tap water receives a grade of A (94/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 1 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Glendale's water?
Of the 69 contaminants tested in Glendale'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 Glendale have any water quality violations?
Yes, Glendale has 3 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other. None of these are classified as health-based violations.
Do I need a water filter in Glendale?
Glendale 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 Glendale's tap water come from?
Glendale's drinking water is sourced from purchased surface water and supplied by GLENDALE WATERWORKS. The system serves approximately 12,883 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Glendale'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. Glendale'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 Glendale's water compare to other cities in Wisconsin?
Glendale's water quality score of 94/100 earns a grade of A, which is considered excellent. This places Glendale among the better-performing water systems in Wisconsin. Visit our Wisconsin state page to see how all cities in the state compare.
What should I do if I'm concerned about Glendale's water quality?
If you have concerns about Glendale'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 (GLENDALE 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.