Public water system · MI0004530
ActiveMount Pleasant
At a glance
Mount Pleasant (PWSID MI0004530) is an active community water system in Isabella County, Michigan. It reports serving 21,688 people through 5,618 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,688
Service connections
5,618
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Mount Pleasant compare with other water systems in Isabella County?
By EPA's size categories, Mount Pleasant is a large system (10,001 to 100,000 people). Isabella County has 83 active public water systems, and Mount Pleasant is the largest of them by population served. Its population served is about 37 times the county average of 581 people per system, and accounts for 45% of the 48,199 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 Mount Pleasant is about 3.2 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 68 Michigan systems (0.6%) list surface water as their primary source.
Who owns and regulates Mount Pleasant?
EPA lists Mount Pleasant 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 83 active systems in Isabella County (6%) are also owned by a local government.
Does Mount Pleasant have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. The violations listed here began between October 2016 and October 2023. By type: 3 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Interim Enhanced Surface Water Treatment Rule (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2022-09-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
| 2016-10-01 | Monitoring and reportingMonitoring, Source Water (LT2) · code 32 | E. colicode 3014 | No | Resolved |
All 4 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.
Mount Pleasant: frequently asked questions
Who runs Mount Pleasant?
Mount Pleasant (PWSID MI0004530) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Mount Pleasant serve?
Mount Pleasant reports serving 21,688 people through 5,618 service connections in Isabella County, Michigan.
Where does Mount Pleasant get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Mount Pleasant have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in October 2023. 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 Mount Pleasant'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 4 violations for this system; 1 is health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Mount Pleasant's water quality report?
As a community water system, Mount Pleasant 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 Isabella County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Union Township | Isabella | 12,927 | Community | Groundwater |
| Shepherd, Village of | Isabella | 1,515 | Community | Groundwater |
| Weidman Ez Mart | Isabella | 800 | Transient non-community | Groundwater |
| Beal City Public Schools | Isabella | 785 | Non-transient non-community | Groundwater |
| Outdoor Adventures- Mt Pleasant | Isabella | 640 | Transient non-community | Groundwater |
| Huggy Bears | Isabella | 500 | 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, “Mount Pleasant, PWSID MI0004530, Michigan”, https://aquacensus.com/water-systems/michigan/mount-pleasant-mi0004530 (data as of October 1, 2026).