Public water system · MI0000290
ActiveAu Sable Township
At a glance
Au Sable Township (PWSID MI0000290) is an active community water system in Iosco County, Michigan. It reports serving 2,370 people through 1,244 service connections. Its primary water source is purchased surface water, 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 September 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,370
Service connections
1,244
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Au Sable Township compare with other water systems in Iosco County?
By EPA's size categories, Au Sable Township is a small system (501 to 3,300 people). Iosco County has 81 active public water systems, and Au Sable Township is the 3rd-largest of them by population served. Its population served is about 8.1 times the county average of 294 people per system, and accounts for 10% of the 23,789 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 Au Sable Township is about 65% 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. 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 Au Sable Township?
EPA lists Au Sable 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. 7 of the 81 active systems in Iosco County (8.6%) are also owned by a local government.
Does Au Sable Township have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in September 2020. The violations listed here began between January 2015 and September 2020. By type: 3 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (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 |
|---|---|---|---|---|
| 2020-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | 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.
Au Sable Township: frequently asked questions
Who runs Au Sable Township?
Au Sable Township (PWSID MI0000290) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Au Sable Township serve?
Au Sable Township reports serving 2,370 people through 1,244 service connections in Iosco County, Michigan.
Where does Au Sable 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 Au Sable Township have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in September 2020. 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 Au Sable 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 3 violations for this system; none is health-based, and the most recent began in September 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Au Sable Township's water quality report?
As a community water system, Au Sable 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 Iosco County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oscoda Township | Iosco | 6,997 | Community | Purchased surface water |
| East Tawas, City of | Iosco | 2,663 | Community | Purchased surface water |
| Old Orchard Park Campground | Iosco | 2,000 | Transient non-community | Groundwater |
| Tawas City, City of | Iosco | 1,834 | Community | Purchased surface water |
| Whittemore/Prescott School Complex | Iosco | 860 | Non-transient non-community | Groundwater |
| Baldwin Township | Iosco | 650 | Community | Purchased 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, “Au Sable Township, PWSID MI0000290, Michigan”, https://aquacensus.com/water-systems/michigan/au-sable-township-mi0000290 (data as of October 1, 2026).