Wauwatosa, Wisconsin: Is the Tap Water Safe to Drink?
2026 EPA water quality data for 14 community water systems serving 50,281+ residents. See violations, PFAS results, lead test results, and safety grades — free.
Is Wauwatosa Tap Water Safe to Drink?
Based on the latest EPA data, Wauwatosa tap water meets all federal drinking water standards. All 14 tested systems have received a safety grade of A or B, with no active health-based violations.
Wauwatosa Water Quality Overview
Wauwatosa, Wisconsin is served by 14 community water systems providing water to approximately 50,281 residents. These systems draw from groundwater (13), surface water purchased (1) sources. Wauwatosa water systems have no recorded health-based violations. Including monitoring and reporting violations, there are 4 total violations on record.
Find Your Water System
Search by ZIP code to find your exact water provider and see its full EPA report.
All 14 water systems in Wauwatosa
Looking for water quality data across the whole state? See our full Wisconsin tap water safety report covering Wisconsin’s EPA-regulated water systems.
Wauwatosa Drinking Water: Frequently Asked Questions
Is Wauwatosa, Wisconsin tap water safe to drink?
Based on the latest EPA data, Wauwatosa tap water meets all federal drinking water standards. All 14 tested systems have received a safety grade of A or B, with no active health-based violations.
How many water utilities serve Wauwatosa, Wisconsin?
14 community water systems serve Wauwatosa, Wisconsin, providing water to approximately 50,281 people. Different neighborhoods may be served by different utilities. Enter your ZIP code at the top to find your specific provider.
Does Wauwatosa tap water have lead?
Lead in drinking water typically enters from old pipes and fixtures inside homes and buildings, not from the treatment plant. The EPA requires water systems to monitor for lead under the Lead and Copper Rule. Click any water system above to see its most recent 90th-percentile lead test results. Homes built before 1986 are most likely to have lead plumbing components.
What contaminants have been found in Wauwatosa drinking water?
EPA violation records for Wauwatosa water systems are listed on each utility's report page. Common regulated contaminants include disinfection byproducts (TTHMs, HAA5), coliform bacteria, nitrates, and lead. Click any utility above to see its full violation history going back 10 years.
How do I find out which water company serves my address in Wauwatosa?
Enter your Wauwatosa ZIP code in the search box at the top of this page. ClearWater will identify the specific water system serving your area and show you its EPA violation history, lead test results, and an overall safety grade. You can also check your water bill or your utility's annual Consumer Confidence Report (CCR).