Public water system · MI0004150
ActiveMarshall
At a glance
Marshall (PWSID MI0004150) is an active community water system in Calhoun County, Michigan. It reports serving 7,088 people through 2,615 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,088
Service connections
2,615
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Marshall compare with other water systems in Calhoun County?
By EPA's size categories, Marshall is a medium system (3,301 to 10,000 people). Calhoun County has 141 active public water systems, and Marshall is the 3rd-largest of them by population served. Its population served is about 11 times the county average of 666 people per system, and accounts for 7.5% of the 93,883 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 Marshall is roughly in line with 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 Marshall?
EPA lists Marshall 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. 10 of the 141 active systems in Calhoun County (7.1%) are also owned by a local government.
Does Marshall have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2022. The violations listed here began between July 2019 and July 2022. By type: 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2022-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
All 3 violations in EPA's records, newest first.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.
Marshall: frequently asked questions
Who runs Marshall?
Marshall (PWSID MI0004150) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Marshall serve?
Marshall reports serving 7,088 people through 2,615 service connections in Calhoun County, Michigan.
Where does Marshall 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 Marshall have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2022. 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 Marshall's 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 3 violations for this system; none is health-based, and the most recent began in July 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Marshall's water quality report?
As a community water system, Marshall 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 Calhoun County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Battle Creek - Verona System | Calhoun | 43,975 | Community | Groundwater |
| Albion | Calhoun | 9,144 | Community | Groundwater |
| Pennfield Township | Calhoun | 3,916 | Community | Groundwater |
| Springfield | Calhoun | 3,833 | Community | Purchased groundwater |
| Emmett Township | Calhoun | 2,550 | Community | Purchased groundwater |
| Homer | Calhoun | 1,668 | 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, “Marshall, PWSID MI0004150, Michigan”, https://aquacensus.com/water-systems/michigan/marshall-mi0004150 (data as of October 1, 2026).