C55/100
Brown Deer Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 12,741 residents · Wisconsin
What's In Brown Deer'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) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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
BROWN DEER WATERWORKS
Population Served
12,741
Water Source
Purchased Surface Water
System ID
WI2410556
Frequently Asked Questions About Brown Deer Water
Is Brown Deer tap water safe to drink?
Brown Deer, Wisconsin tap water receives a grade of C (55/100), which is considered fair. 0 contaminant(s) exceed EPA maximum contaminant levels and 22 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Brown Deer's water?
Of the 69 contaminants tested in Brown Deer'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 Brown Deer have any water quality violations?
Yes, Brown Deer has 22 EPA violation(s) on record, with the most recent in 2020. Violation types include MON, MR, Other. 5 of these are health-based violations, which are the most serious category.
Do I need a water filter in Brown Deer?
Brown Deer 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 Brown Deer's tap water come from?
Brown Deer's drinking water is sourced from purchased surface water and supplied by BROWN DEER WATERWORKS. The system serves approximately 12,741 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Brown Deer'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. Brown Deer'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 Brown Deer's water compare to other cities in Wisconsin?
Brown Deer's water quality score of 55/100 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 Brown Deer's water quality?
If you have concerns about Brown Deer'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 (BROWN DEER 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.