CITY REPORT MI HEALTH VIOLATIONS: 1

Bay City, MI: 1 Health Violation - Home Safety 99/100

3 ZIP codes · 8 water systems · Updated

ZipCheckup grade for Bay City: A.

Checked records flag no major concern; missing data is unknown.

Based on available records, Bay City, MI holds an A or B ZipCheckup grade.

How Bay City Compares

Bay City99/100
Michigan avg85/100
National avg73/100

Data: EPA SDWIS

3
ZIP Codes
8
Water Systems
2
ZIPs Linked to Systems with Violations
A · 99
Avg Safety Score
Zone 3
County Radon Potential (Low)
$142K
Median Home Value
$550
Est. Remediation (0.4% of home value)

Key Facts for Bay City Residents

  • Your city's water systems recorded 5 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.01 mg/L.
  • Homes built before 1986: 85% - older plumbing may contain lead solder.
  • Estimated remediation: $550 per household.
  • Health risk index (ZipCheckup composite of CDC data): 14.44.

Bay City's Water Providers

Sorted by reported population served, the top 3 of 8 public water systems mapped to Bay City, MI appear below, each with its own federal compliance record.

Overview

We track home safety data for 3 ZIP codes in Bay City, Michigan (population ~64,507), covering 8 community water systems serving approximately 114,851 people region-wide. The EPA snapshots used for this build directly map water systems to 2 of 3 ZIP codes.

2 of 2 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 1 health-based violation appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Bay City: A (99/100)

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

Bay City water systems draw from: Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0100 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 2 ZIP codes with known status exceed the EPA lead action level

Radon Risk

3 of 3 ZIP records with known zones are in EPA Radon Zone 3.

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 4 1
Total Trihalomethanes (TTHM) Disinfection Byproducts 4 1
Lead and Copper Rule Treatment Technique 3 2

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
48708 A 5 1 City of Bay City,
48706 A 1 1 City of Bay City,

All ZIP Codes in Bay City

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Bay City Community Health Snapshot

11.5%
Asthma (US: 9.8%)
12.6%
Diabetes (US: 10.4%)
17.6%
Poor Mental Health (US: 14.8%)

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

Asthma 11.5% ↑
Diabetes 12.6% ↑
Mental Health 17.6% ↑

Vertical line = national average. ■ Above national · ■ Below national

What's in Bay City's Water?

Haloacetic Acids (HAA5) 4 violations
Disinfection Byproducts · EPA regulatory level for the contaminant named above: 0.06 mg/L
Increased cancer risk with long-term exposure above the MCL
Total Trihalomethanes (TTHM) 4 violations
Disinfection Byproducts · EPA regulatory level for the contaminant named above: 0.08 mg/L
Increased cancer risk with long-term exposure above the MCL
Lead and Copper Rule 3 violations
Treatment Technique
Developmental delays in children, kidney damage

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

Bay City Infrastructure Age

1955
Median Build Year
85%
Built Before 1986
69%
Built Before 1970
Galvanized Steel or Copper
Likely Pipe Material

With 85% 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

Lead can reach tap water from service lines, solder and brass fittings inside a building, which is why housing age draws attention in Bay City, where the median build year is 1955.

1955
Median Year Built
85%
Pre-1986 (lead solder era; lead paint banned 1978)
69%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (69%) 1970–1986 (16%) Post-1986 (15%)

Over half of homes in Bay City 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.

How Remediation Costs Compare in Bay City

Estimated remediation for Bay City is a small fraction of median property value - one percent or less - though the ratio does not describe any single household.

Median Home Value
$142,300
Est. Remediation
$550
Remediation as % of home value 0.4%

Estimated remediation costs in Bay City can be compared with local home values. The $300–$1,000 estimated range can be set against the median property value; actual costs vary by home. Home values are 30% below the Michigan average.

Bay City: Lead Risk & Vulnerable Populations

85%
Homes Built Before 1986
0.01
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

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.

Lead results averaged across Bay City ZIP codes reach 10 ppb or more; about 85% of the housing predates 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Bay City: NFIP Claim Records and Water-Quality Context

324
Total FEMA Flood Claims
$6,525
Avg Reported Sum With Payment Data
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Bay City contains 324 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $6,525. Among ZIP codes with claim records, 0% 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 $550 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.

Deep Dive Reports

Detailed analysis for Bay City, MI

Frequently Asked Questions

What does the Home Safety Score mean for Bay City, MI?
Bay City has an average Home Safety Score of 99/100 (Grade A) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 5 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving Bay City?
EPA records list 5 EPA violations, including 1 health-based violation for Bay City water systems. These water-system violations are shown for 3 mapped ZIP codes.
Does Bay City water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Bay City is 0.01 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Bay City compare to Michigan average?
Bay City has an average Home Safety Score of 99/100, which is at or above the Michigan state average of 85/100 for the same model series.
How many water systems serve Bay City?
Our records map 8 water systems to 3 ZIP codes in Bay City. The related population figure in our data is approximately 64,507 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Bay City?
Estimated remediation cost per household in Bay City: $550; modeled range $300 to $1,000. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
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How to cite this page

APA ZipCheckup. (2026). Bay City, MI: 1 Health Violation - Home Safety 99/100. https://zipcheckup.com/cities/mi/bay-city/
BibTeX 
@misc{zipcheckup-cities-mi-bay-city,
  author = {{ZipCheckup}},
  title  = {{Bay City, MI: 1 Health Violation - Home Safety 99/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/mi/bay-city/}
}

Page version: October 2026.

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