Ann Arbor, MI: 1 Health Violation - Home Safety 65/100
8 ZIP codes · 8 water systems · Updated
ZipCheckup grade for Ann Arbor: C.
A mixed picture - some signals here are worth your attention.
Ann Arbor, MI holds a middle-tier grade; review the underlying water system records for the reasons behind it.
How Ann Arbor Compares
Data: EPA SDWIS
Water Quality Map: Ann Arbor, MI
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Distribution of Home Safety grades across Ann Arbor.
Ann Arbor Water: The Quick Version
- Your city's water systems recorded 12 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0046 mg/L.
- Homes built before 1986: 62% - older plumbing may contain lead solder.
- Estimated remediation: $538 per household.
- Health risk index (ZipCheckup composite of CDC data): 10.41.
Water Systems Serving Ann Arbor
Service in Ann Arbor, MI can differ by address: 8 water systems are tied to the area in federal records, and the 3 largest are listed with their violation records.
- C
- C
- C
Overview
We track home safety data for 8 ZIP codes in Ann Arbor, Michigan, covering 8 community water systems serving approximately 168,550 people. The EPA snapshots used for this build directly map water systems to 5 of 8 ZIP codes.
3 of 5 ZIP codes with a reported violation count in the available EPA record (60%) have recorded EPA violations. 1 health-based violation appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Ann Arbor: C (65/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Ann Arbor water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0046 mg/L (EPA action level: 0.015 mg/L)
- 0 of 5 ZIP codes with known status exceed the EPA lead action level
Radon Risk
8 of 8 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 8 | 3 |
| Lead and Copper Rule | Treatment Technique | 7 | 2 |
| Consumer Confidence Rule | Reporting | 7 | 3 |
| Lead and Copper Rule Revisions | Treatment Technique | 6 | 3 |
| Revised Total Coliform Rule | Microbiological | 6 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 48103 | C | 11 | 0 | Ann Arbor |
| 48105 | C | 11 | 1 | Ann Arbor |
| 48108 | C | 5 | 0 | Pittsfield Township |
Areas with No Violations
All ZIP Codes in Ann Arbor
- 48103 [C] - 11 violations
- 48104 [C]
- 48105 [C] - 11 violations ⚠
- 48106
- 48107
- 48108 [C] - 5 violations
- 48109 [C]
- 48113
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Ann Arbor
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Ann Arbor
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Ann Arbor's Housing Stock?
With 62% of homes built before 1986, lead solder in plumbing is a potential concern. Federal law banned lead solder in drinking-water plumbing in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Some homes in Ann Arbor predate the 1986 federal restrictions on lead in new pipe and solder, so a tap test is a reasonable step for older homes; median build year: 1979.
Over half of homes in Ann Arbor were built before 1986, when federal law began restricting lead solder in drinking-water plumbing. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Ann Arbor: Remediation Cost in Perspective
Measured against the median home value, the estimated cost of fixing the issues flagged for Ann Arbor lands in the lowest of the three tiers this page uses.
Estimated remediation costs in Ann Arbor can be compared with local home values. The $319–$875 estimated range can be set against the median property value; actual costs vary by home. Home values are 136% above the Michigan average.
Protecting Children from Lead in Ann Arbor
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Ann Arbor
Historical NFIP data for Ann Arbor contains 68 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $19,751. Among ZIP codes with claim records, 50% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The $538 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Ann Arbor
- Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
- Install a certified water filter. For Haloacetic Acids (HAA5), listed in the water-quality records for Ann Arbor: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
- Check your home's plumbing. With 62% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Ann Arbor, MI