Public water system · MI0004070
ActiveMarcellus
At a glance
Marcellus (PWSID MI0004070) is an active community water system in Cass County, Michigan. It reports serving 1,198 people through 470 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,198
Service connections
470
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Marcellus compare with other water systems in Cass County?
By EPA's size categories, Marcellus is a small system (501 to 3,300 people). Cass County has 135 active public water systems, and Marcellus is the 5th-largest of them by population served. Its population served is about 4.8 times the county average of 251 people per system, and accounts for 3.5% of the 33,840 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active community water system reports serving 6,703 people, so Marcellus is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Michigan has 1,332 active community water systems, 13% of the state's 10,599 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,214 Michigan systems (96%) list groundwater as their primary source.
Who owns and regulates Marcellus?
EPA lists Marcellus as owned by a local government. The MI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 135 active systems in Cass County (3.7%) are also owned by a local government.
Does Marcellus have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2024. By type: 1 reporting. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-12-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
The one violation in EPA's records.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Marcellus: frequently asked questions
Who runs Marcellus?
Marcellus (PWSID MI0004070) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Marcellus serve?
Marcellus reports serving 1,198 people through 470 service connections in Cass County, Michigan.
Where does Marcellus get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Marcellus have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Marcellus' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list one violation for this system; it is not health-based, and the most recent began in December 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Marcellus' water quality report?
As a community water system, Marcellus must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Cass County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dowagiac | Cass | 6,350 | Community | Groundwater |
| Cassopolis | Cass | 1,815 | Community | Groundwater |
| Cass County Water System | Cass | 1,350 | Community | Groundwater |
| Edwardsburg | Cass | 1,260 | Community | Groundwater |
| Howard-Ellis Elementary | Cass | 780 | Non-transient non-community | Groundwater |
| Shady Point Campground West Well | Cass | 640 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Marcellus, PWSID MI0004070, Michigan”, https://aquacensus.com/water-systems/michigan/marcellus-mi0004070 (data as of October 1, 2026).