Public water system · MI0000040

Active

Adrian

At a glance

Adrian (PWSID MI0000040) is an active community water system in Lenawee County, Michigan. It reports serving 23,663 people through 6,077 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2025.

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

Population served

23,663

Service connections

6,077

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDMI0000040

System typeCommunity water system

Activity statusActive

Population served23,663

Service connections6,077

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyMI state drinking water program

City servedAdrian

StateMichigan

ZIP—

CountyLenawee County

How does Adrian compare with other water systems in Lenawee County?

By EPA's size categories, Adrian is a large system (10,001 to 100,000 people). Lenawee County has 182 active public water systems, and Adrian is the largest of them by population served. Its population served is about 54 times the county average of 437 people per system, and accounts for 30% of the 79,516 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 Adrian is about 3.5 times 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 Adrian?

EPA lists Adrian 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. 17 of the 182 active systems in Lenawee County (9.3%) are also owned by a local government.

Does Adrian have drinking water violations?

EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in July 2025. The violations listed here began between January 1992 and July 2025. By type: 4 monitoring and reporting, 3 contaminant level above the legal limit, 2 required treatment not met and 1 reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 10 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
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Resolved
2019-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2019-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2016-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2014-09-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2004-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
1996-07-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1996-02-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1995-06-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1992-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved

All 10 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.

Adrian: frequently asked questions

Who runs Adrian?

Adrian (PWSID MI0000040) is a community water system owned by a local government. It is regulated by the MI state drinking water program.

How many people does Adrian serve?

Adrian reports serving 23,663 people through 6,077 service connections in Lenawee County, Michigan.

Where does Adrian 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 Adrian have any drinking water violations?

EPA's records list 10 violations for this system; 5 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 Adrian'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 10 violations for this system; 5 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 Adrian's water quality report?

As a community water system, Adrian 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 Lenawee County

Water system	County	Population served	Type	Source
Tecumseh	Lenawee	8,521	Community	Groundwater
The Groves of Michigan	Lenawee	6,460	Transient non-community	Groundwater
Madison Township	Lenawee	3,480	Community	Groundwater
Blissfield	Lenawee	3,276	Community	Surface water
Clinton	Lenawee	2,336	Community	Groundwater
Hudson	Lenawee	2,307	Community	Groundwater

Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.

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, “Adrian, PWSID MI0000040, Michigan”, https://aquacensus.com/water-systems/michigan/adrian-mi0000040 (data as of October 1, 2026).