Cassopolis
EPA ID: MI0001250 · 1,815 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Cassopolis (MI0001250): 4 violations on record since 2021. 4 violations on file at Cassopolis, none open; 1,815 people served.
Data: EPA SDWIS
Service Area Map
Coverage area for Cassopolis Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Cassopolis have a median household income of $62,919 and about 22,826 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 69% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Cassopolis's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Michigan
System Overview
Cassopolis (EPA ID: MI0001250) is a community water system in Michigan that serves approximately 1,815 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 2 resolved, 2 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| March 1, 2026 | Revised Total Coliform Rule | Non-health-based | Archived |
| March 1, 2026 | Chlorine | Non-health-based | Archived |
| October 1, 2023 | Chlorine | Non-health-based | Resolved |
| October 11, 2021 | Revised Total Coliform Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Chlorine | Monitoring & Reporting | 2 | No |
| Chlorine | Monitoring & Reporting | 2 | No |
Lead & Copper
No reported lead measurement appears for this PWSID in the accepted LCR snapshot. Absence of a reported measurement is not a measured zero.
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 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.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by MI or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Cassopolis (MI0001250) on EPA.gov.
Frequently Asked Questions
Is Cassopolis water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Cassopolis; its 4 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Cassopolis serve?
Cassopolis serves approximately 1,815 people across 2 ZIP codes in Michigan.
Where does Cassopolis get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Cassopolis (MI): 4 EPA Violations. https://zipcheckup.com/water-system/mi0001250/
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author = {{ZipCheckup}},
title = {{Cassopolis (MI): 4 EPA Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/mi0001250/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Cassopolis (EPA ID: MI0001250) - request the latest Consumer Confidence Report or ask about specific contaminants.