Public water system · MI0002200
ActiveMcmillan Township
At a glance
Mcmillan Township (PWSID MI0002200) is an active community water system in Ontonagon County, Michigan. It reports serving 391 people through 170 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
391
Service connections
170
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mcmillan Township compare with other water systems in Ontonagon County?
By EPA's size categories, Mcmillan Township is a very small system (500 people or fewer). Ontonagon County has 25 active public water systems, and Mcmillan Township is the 2nd-largest of them by population served. Its population served is about 85% above the county average of 211 people per system, and accounts for 7.4% of the 5,270 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 Mcmillan Township 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 Mcmillan Township?
EPA lists Mcmillan 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. 5 of the 25 active systems in Ontonagon County (20%) are also owned by a local government.
Does Mcmillan Township have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2018. The violations listed here began between February 1997 and January 2018. By type: 8 monitoring and reporting, 3 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2018-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2017-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2016-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2013-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-10-19 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1997-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The 12 most recent 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.
Mcmillan Township: frequently asked questions
Who runs Mcmillan Township?
Mcmillan Township (PWSID MI0002200) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Mcmillan Township serve?
Mcmillan Township reports serving 391 people through 170 service connections in Ontonagon County, Michigan.
Where does Mcmillan Township 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 Mcmillan Township have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2018. 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 Mcmillan 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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Mcmillan Township's water quality report?
As a community water system, Mcmillan 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 Ontonagon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ontonagon | Ontonagon | 2,607 | Community | Surface water |
| Rockland Township | Ontonagon | 350 | Community | Groundwater |
| Bergland Township | Ontonagon | 210 | Community | Groundwater |
| Interior Township | Ontonagon | 200 | Community | Groundwater |
| North Coast Adventures Campground | Ontonagon | 180 | Transient non-community | Groundwater |
| Settlers Cooperative | Ontonagon | 150 | 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, “Mcmillan Township, PWSID MI0002200, Michigan”, https://aquacensus.com/water-systems/michigan/mcmillan-township-mi0002200 (data as of October 1, 2026).