Public water system · MI0005400

Active

Plymouth

At a glance

Plymouth (PWSID MI0005400) is an active community water system in Wayne County, Michigan. It reports serving 9,132 people through 3,207 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2024.

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

Population served

9,132

Service connections

3,207

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDMI0005400

System typeCommunity water system

Activity statusActive

Population served9,132

Service connections3,207

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyMI state drinking water program

City servedPlymouth

StateMichigan

ZIP—

CountyWayne County

How does Plymouth compare with other water systems in Wayne County?

By EPA's size categories, Plymouth is a medium system (3,301 to 10,000 people). Wayne County has 55 active public water systems. Its population served is well below the county average of 32,428 people per system, and accounts for 0.5% of the 1,783,512 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 Plymouth is about 36% above 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 Plymouth?

EPA lists Plymouth 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. 44 of the 55 active systems in Wayne County (80%) are also owned by a local government.

Does Plymouth have drinking water violations?

EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2024. The violations listed here began between July 1999 and January 2024. By type: 6 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Haloacetic acids (HAA5) (2 of them). EPA lists 8 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
2024-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2024-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2023-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2023-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2023-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2021-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2001-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1999-07-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved

All 8 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.

Plymouth: frequently asked questions

Who runs Plymouth?

Plymouth (PWSID MI0005400) is a community water system owned by a local government. It is regulated by the MI state drinking water program.

How many people does Plymouth serve?

Plymouth reports serving 9,132 people through 3,207 service connections in Wayne County, Michigan.

Where does Plymouth 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 Plymouth have any drinking water violations?

EPA's records list 8 violations for this system; none is health-based, and the most recent began in January 2024. 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 Plymouth'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 8 violations for this system; none is health-based, and the most recent began in January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.

Where can I find Plymouth's water quality report?

As a community water system, Plymouth 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 Wayne County

Water system	County	Population served	Type	Source
Detroit City of	Wayne	633,218	Community	Purchased surface water
Dearborn	Wayne	109,976	Community	Purchased surface water
Canton Township	Wayne	99,627	Community	Surface water
Livonia	Wayne	96,942	Community	Purchased surface water
Westland	Wayne	85,420	Community	Purchased surface water
Taylor	Wayne	63,409	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, “Plymouth, PWSID MI0005400, Michigan”, https://aquacensus.com/water-systems/michigan/plymouth-mi0005400 (data as of October 1, 2026).