Public water system · MI0001650
ActiveCottrellville Township
At a glance
Cottrellville Township (PWSID MI0001650) is an active community water system in St. Clair County, Michigan. It reports serving 3,200 people through 960 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in April 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,200
Service connections
960
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Cottrellville Township compare with other water systems in St. Clair County?
By EPA's size categories, Cottrellville Township is a small system (501 to 3,300 people). St. Clair County has 96 active public water systems. Its population served is about 157% above the county average of 1,246 people per system, and accounts for 2.7% of the 119,605 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 Cottrellville Township is about half of 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 262 Michigan systems (2.5%) list purchased surface water as their primary source.
Who owns and regulates Cottrellville Township?
EPA lists Cottrellville Township 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. 18 of the 96 active systems in St. Clair County (19%) are also owned by a local government.
Does Cottrellville Township have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in April 2023. The violations listed here began between October 2005 and April 2023. By type: 3 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Haloacetic acids (HAA5), Total trihalomethanes (TTHM), Consumer Confidence Rule and Lead and Copper Rule. 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 |
|---|---|---|---|---|
| 2023-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2005-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | 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.
Cottrellville Township: frequently asked questions
Who runs Cottrellville Township?
Cottrellville Township (PWSID MI0001650) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Cottrellville Township serve?
Cottrellville Township reports serving 3,200 people through 960 service connections in St. Clair County, Michigan.
Where does Cottrellville Township get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Cottrellville Township have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in April 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 Cottrellville Township'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; none is health-based, and the most recent began in April 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 Cottrellville Township's water quality report?
As a community water system, Cottrellville Township 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 St. Clair County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Port Huron, City of | St. Clair | 28,983 | Community | Surface water |
| Port Huron Township | St. Clair | 10,654 | Community | Purchased surface water |
| Marysville, City of | St. Clair | 9,959 | Community | Surface water |
| Clay Township | St. Clair | 9,866 | Community | Purchased surface water |
| Ira Township | St. Clair | 6,510 | Community | Surface water |
| St. Clair Water and Sewer Authority | St. Clair | 5,847 | Community | Surface water |
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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, “Cottrellville Township, PWSID MI0001650, Michigan”, https://aquacensus.com/water-systems/michigan/cottrellville-township-mi0001650 (data as of October 1, 2026).