Public water system · MI0006290

Active

St. Ignace

At a glance

St. Ignace (PWSID MI0006290) is an active community water system in Mackinac County, Michigan. It reports serving 2,987 people through 1,562 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in July 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

2,987

Service connections

1,562

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDMI0006290

System typeCommunity water system

Activity statusActive

Population served2,987

Service connections1,562

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyMI state drinking water program

City servedSt. Ignace

StateMichigan

ZIP—

CountyMackinac County

How does St. Ignace compare with other water systems in Mackinac County?

By EPA's size categories, St. Ignace is a small system (501 to 3,300 people). Mackinac County has 113 active public water systems, and St. Ignace is the largest of them by population served. Its population served is about 27 times the county average of 110 people per system, and accounts for 24% of the 12,387 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 St. Ignace is about 55% 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. 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 St. Ignace?

EPA lists St. Ignace 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 113 active systems in Mackinac County (6.2%) are also owned by a local government.

Does St. Ignace have drinking water violations?

EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in July 2025. The violations listed here began between January 1992 and July 2025. By type: 3 required treatment not met, 2 monitoring and reporting, 1 reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Lead and Copper Rule Revisions, Lead and Copper Rule, Carbon, total and Long Term 2 Enhanced Surface Water Treatment Rule. EPA lists 6 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Unaddressed
2022-01-01	Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59	Lead and Copper Rulecode 5000	Yes	Resolved
2021-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2016-06-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2003-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2001-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1992-01-01	Required treatment not metFailure to Filter (SWTR) · code 42	Surface Water Treatment Rulecode 0200	Yes	Resolved

All 7 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.

St. Ignace: frequently asked questions

Who runs St. Ignace?

St. Ignace (PWSID MI0006290) is a community water system owned by a local government. It is regulated by the MI state drinking water program.

How many people does St. Ignace serve?

St. Ignace reports serving 2,987 people through 1,562 service connections in Mackinac County, Michigan.

Where does St. Ignace 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 St. Ignace have any drinking water violations?

EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in July 2025. 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 St. Ignace'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 7 violations for this system; 3 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.

Where can I find St. Ignace's water quality report?

As a community water system, St. Ignace 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 Mackinac County

Water system	County	Population served	Type	Source
Mackinac Island	Mackinac	583	Community	Surface water
Engadine School	Mackinac	552	Non-transient non-community	Groundwater
Les Cheneaux School	Mackinac	336	Non-transient non-community	Groundwater
Hiawatha Sportmen'S Club-Grp 1 (7-16)	Mackinac	200	Transient non-community	Groundwater
Mdot - Gros Cap Park, P219	Mackinac	200	Transient non-community	Groundwater
Hiawatha Sportmen'S Club-Group 3 (30-35)	Mackinac	200	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, “St. Ignace, PWSID MI0006290, Michigan”, https://aquacensus.com/water-systems/michigan/st-ignace-mi0006290 (data as of October 1, 2026).