Detroit Drinking Water Quality
What's Really in Your Tap Water?
Detroit tap water has contaminants that exceed current EPA standards. At 648.5 ppm (37.9 gpg), the water is quite hard — you may notice mineral buildup on fixtures. Lead levels test well below the EPA action level. There have been 16 violations recorded over the past 3 years.
Action Needed
Quality issues detected
37.9 GPG hardness
Lead
Below EPA action level
EPA action level: 15 ppb
Hardness
Very Hard water
US Average: 100 ppm
Is Detroit Tap Water Safe to Drink?
Detroit tap water has contaminants that exceed current EPA maximum contaminant levels.
EPA Violations — 12 health-based EPA violations in the past 3 years across 2 water systems. Plus 4 monitoring/reporting violations.
Health-based violations mean the water exceeded a federal maximum contaminant level. This is more serious than administrative violations.
→ Consider testing your water at home and using a certified water filter until violations are resolved.
Lead — Lead (12.7 ppb) is at 85% of the EPA action level of 15 ppb.
The data below shows test results from 2 water utilities serving 633K people in the Detroit area.
Based on publicly available data from EPA Water Quality Portal (Various). Water quality can vary by location, building plumbing, and over time. This assessment reflects compliance with federal EPA standards and is not medical advice.
Do I Need a Water Filter?
With very hard water (648.5 ppm), a water softener can reduce scale buildup in pipes, appliances, and water heaters.
How Hard is Detroit Water?
648.5 ppm
37.9 grains per gallon
Very hard water causes significant mineral buildup. A water softener is recommended.
Impact on Your Home
Shower
Dries out skin & hair
Kitchen
Heavy mineral deposits
Laundry
Stiff, dingy clothes
Appliances
Significant scale
Regional Comparison
Values in ppm (mg/L as CaCO₃)
Do I Need a Water Softener?
At 648.5 ppm, Detroit has very hard water. A water softener can help prevent scale buildup in water heaters, dishwashers, and pipes. According to the Water Quality Research Foundation, hard water can reduce appliance efficiency and increase energy costs. A whole-house water softener or salt-free conditioner can help.
Want to verify your home's exact hardness level? See our best water hardness test kits.
Based on 68 water samples from Wayne County
Your pipes tell a different story
The data above shows what leaves the treatment plant—not what comes out of your faucet. Old pipes, lead solder, and building plumbing can add contaminants the city never tests for. Know exactly what's in your Detroit tap water.
Home test kits detect lead, bacteria, pesticides, and 100+ other contaminants. Results in 5-10 business days from certified labs.
Lead & Contaminants
Understanding lead levels and water quality violations in Detroit
Lead Test Results
90th Percentile Lead Level
12.7 ppb
Detroit lead levels are within limits but approaching the EPA action level.
While within limits, consider a filter if you have young children or want extra protection.
Last sampled: 2024-12-31
About Lead in Drinking Water
What is Lead in Water?
According to the EPA, lead is a toxic metal that can dissolve into drinking water from older pipes, solder, and fixtures. It's invisible, tasteless, and odorless, making testing the only way to detect it. The EPA has set an action level of 15 ppb and states there is no safe level of lead exposure.
Potential Health Effects
According to the CDC: developmental delays, learning difficulties, lower IQ, behavioral issues
According to the EPA: high blood pressure, kidney damage, reproductive issues
How to Reduce Exposure
- •Run water for 30 seconds to 2 minutes before drinking, especially in the morning
- •Use cold water for cooking and drinking (hot water dissolves more lead)
- •Install a NSF-certified filter designed to remove lead
- •Test your water, especially if your home was built before 1986
EPA Compliance History
Action Recommended
Active health-based violations detectedConsider using a certified water filter until violations are resolved. Contact your utility for updates on corrective actions.
3-Year Violation Summary
16
Total Violations
12
Health-Related
4
Administrative
Health-Related Violations
Contaminant exceeded EPA maximum contaminant levels. The EPA recommends considering certified filtration.
Administrative Violations
Missed testing deadlines or reporting. Does not indicate water quality issues.
Who Provides Detroit's Water?
Utility Name
DETROIT CITY OF
EPA System ID (PWSID)
MI0001800
Primary Water Source
Surface Water
Population Served
633K
Frequently Asked Questions
Common questions about Detroit tap water quality
Nearby Cities in Michigan
Grand Rapids
Hard water
Kalamazoo
Hard water
Lansing
Ann Arbor
Very Hard water
Warren
Very Hard water
Sterling Heights
Very Hard water
This data is for informational purposes only. Water quality can vary by neighborhood and building. For official reports, contact your local water utility or the EPA. Learn about our methodology
Data source: EPA Water Quality Portal (environmental samples, not verified tap water)