Public water system · MI0005290

Active

Petersburg

At a glance

Petersburg (PWSID MI0005290) is an active community water system in Monroe County, Michigan. It reports serving 1,115 people through 548 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in October 2023.

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

Population served

1,115

Service connections

548

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDMI0005290

System typeCommunity water system

Activity statusActive

Population served1,115

Service connections548

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyMI state drinking water program

City servedPetersburg

StateMichigan

ZIP—

CountyMonroe County

How does Petersburg compare with other water systems in Monroe County?

By EPA's size categories, Petersburg is a small system (501 to 3,300 people). Monroe County has 83 active public water systems. Its population served is about 35% below the county average of 1,703 people per system, and accounts for 0.8% of the 141,308 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 Petersburg 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. 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 Petersburg?

EPA lists Petersburg 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. 9 of the 83 active systems in Monroe County (11%) are also owned by a local government.

Does Petersburg have drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in October 2023. The violations listed here began between August 1999 and October 2023. By type: 7 monitoring and reporting, 4 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 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
2023-10-26	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2022-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2022-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2019-11-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2019-11-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2018-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2018-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2004-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2003-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2001-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2000-12-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1999-08-01	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.

Petersburg: frequently asked questions

Who runs Petersburg?

Petersburg (PWSID MI0005290) is a community water system owned by a local government. It is regulated by the MI state drinking water program.

How many people does Petersburg serve?

Petersburg reports serving 1,115 people through 548 service connections in Monroe County, Michigan.

Where does Petersburg 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 Petersburg have any drinking water violations?

Of the 12 most recent violations in EPA's records, 4 are 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 Petersburg'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, 4 are 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 Petersburg's water quality report?

As a community water system, Petersburg 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 Monroe County

Water system	County	Population served	Type	Source
Monroe	Monroe	49,467	Community	Surface water
Monroe South County	Monroe	33,816	Community	Purchased surface water
Frenchtown Township	Monroe	21,609	Community	Surface water
Berlin Township	Monroe	9,900	Community	Purchased surface water
Ash Township	Monroe	5,959	Community	Purchased surface water
Dundee	Monroe	5,400	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, “Petersburg, PWSID MI0005290, Michigan”, https://aquacensus.com/water-systems/michigan/petersburg-mi0005290 (data as of October 1, 2026).