Water Quality in Ypsilanti, MI: 36 Violations Recorded for Mapped Water Systems
5 water systems · 2 directly mapped ZIP records
Available EPA records report 36 violations across 2 directly mapped ZIP records with known counts for Ypsilanti. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Ypsilanti
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 48198 | 32 | 2 | View report → |
| 48197 | 4 | 0 | View report → |
Violation Trend
EPA violations recorded for water systems serving Ypsilanti.
| Year | Total violations | Health-based |
|---|---|---|
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
Water Quality Overview
Ypsilanti, Michigan has directly mapped EPA water-system data for 2 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 36 violations, including 2 health-based violations across 2 directly mapped ZIP records with reported counts.
Lead Levels
The average of the reported 90th-percentile lead results across the ZIP codes of Ypsilanti is 0.0071 mg/L; the EPA action level of 0.015 mg/L applies to a water system's own 90th-percentile result and is not a safety threshold (EPA's health goal for lead is zero). No exceedances appear among the 2 ZIP records with known lead status.
With 65% of homes built before 1986, Ypsilanti has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Ypsilanti
Ypsilanti is served by 5 community water systems regulated under the Safe Drinking Water Act. About 105,418 people live in the area (2 ZIP codes, Census); this is not the systems' reported service population.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
EPA records list 20 enforcement actions against water systems serving Ypsilanti. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Ypsilanti
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
Request your CCR - your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test - certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration - NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories - monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Ypsilanti Water Systems
The following contaminants have been detected or caused violations across Ypsilanti's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 3 | 2 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 2 | 2 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 2 | 2 | No |
| Chlorine residual | Disinfectant | 4 mg/L | 1 | 1 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 1 | 1 | No |
| Lead | Inorganic | 0.015 mg/L | 1 | 1 | No |
| PFOA | PFAS | 0.000004 mg/L | 1 | 1 | No |
| PFNA | PFAS | 0.00001 mg/L | 1 | 1 | No |
| Monochloroacetic Acid | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
| Dichloroacetic Acid | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
| Bromodichloromethane | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
| Dibromochloromethane | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
| Bromoform | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
| Chlorodibromomethane | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
| Trichloroacetic Acid | Disinfection Byproducts | 0.06 mg/L | 1 | 1 | No |
The standard column shows the EPA Maximum Contaminant Level (MCL) except for lead and copper, whose value is an action level that triggers corrective steps and is not an MCL. Health-based violations are MCL, MRDL and treatment-technique violations.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Ypsilanti:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
Violation counts have remained stable over the observed period.
EPA Enforcement History
The EPA and state regulators have taken 20 enforcement actions against water systems serving Ypsilanti. Recent actions:
| Date | Action Type |
|---|---|
| 2026-02-07 | State Order Extension |
| 2025-12-17 | State Informal Action |
| 2025-12-17 | State Filed Motion |
| 2025-12-15 | State Order Extension |
| 2025-12-03 | State Informal Action |
| 2025-12-03 | State Informal Action |
| 2025-12-03 | State Order Extension |
| 2025-12-03 | State Filed Motion |
| 2025-11-20 | State Informal Action |
| 2025-10-31 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-02-07.
Ypsilanti vs. Nearby Michigan Cities
How Ypsilanti's water quality compares to similar cities in Michigan:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Ypsilanti | 2 | 36 | 5 | 105,418 |
| Jackson | 3 | 39 | 5 | 104,397 |
| Dearborn | 4 | 0 | 2 | 107,846 |
| Rochester | 3 | 6 | 9 | 102,352 |
Common Questions About Ypsilanti Water
These are the most common questions residents search for about water quality in Ypsilanti, Michigan:
Is Ypsilanti water hard or soft? Water hardness varies by source. Ypsilanti's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Ypsilanti tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 2 health-based violations; check the affected utility record and consider certified testing.
What is the best water filter for Ypsilanti? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Ypsilanti vs. Michigan Average
Understanding how Ypsilanti compares to the broader Michigan average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below - water quality can vary significantly even within Ypsilanti.
ZIP Codes in Ypsilanti
Ypsilanti spans 2 ZIP codes. EPA water-system coverage is available for 2 directly mapped ZIP codes. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Source reporting periods vary. See each cited source for its publication schedule.