Public water system · IN5250010
ActivePlymouth Water Department
At a glance
Plymouth Water Department (PWSID IN5250010) is an active community water system in Marshall County, Indiana. It reports serving 10,241 people through 3,689 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, none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
10,241
Service connections
3,689
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Plymouth Water Department compare with other water systems in Marshall County?
By EPA's size categories, Plymouth Water Department is a large system (10,001 to 100,000 people). Marshall County has 87 active public water systems, and Plymouth Water Department is the largest of them by population served. Its population served is about 23 times the county average of 442 people per system, and accounts for 27% of the 38,447 people reported by systems filed under the county. Across Indiana, the 3,969 active systems average 1,456 people each. Nationally, the average active community water system reports serving 6,703 people, so Plymouth Water Department is about 53% 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. Indiana has 770 active community water systems, 19% of the state's 3,969 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,769 Indiana systems (95%) list groundwater as their primary source.
Who owns and regulates Plymouth Water Department?
EPA lists Plymouth Water Department as owned by a local government. The IN 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 87 active systems in Marshall County (8%) are also owned by a local government.
Does Plymouth Water Department have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2025. The violations listed here began between July 1995 and July 2025. By type: 10 monitoring and reporting, 1 public notice, recordkeeping or other and 1 reporting. The contaminants or rules involved are Consumer Confidence Rule, Revised Total Coliform Rule, Haloacetic acids (HAA5) and Total trihalomethanes (TTHM). 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 |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-07-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2018-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toxaphenecode 2020 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorobenzenecode 2274 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylene dibromide (EDB)code 2946 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Heptachlorcode 2065 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorocyclopentadienecode 2042 | No | Resolved |
| 1995-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfonecode 2044 | No | 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.
Plymouth Water Department: frequently asked questions
Who runs Plymouth Water Department?
Plymouth Water Department (PWSID IN5250010) is a community water system owned by a local government. It is regulated by the IN state drinking water program.
How many people does Plymouth Water Department serve?
Plymouth Water Department reports serving 10,241 people through 3,689 service connections in Marshall County, Indiana.
Where does Plymouth Water Department 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 Plymouth Water Department have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is 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 Plymouth Water Department'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, none is 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 IN state drinking water program.
Where can I find Plymouth Water Department's water quality report?
As a community water system, Plymouth Water Department 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 Marshall County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bremen Water Department | Marshall | 4,516 | Community | Groundwater |
| Jellystone Park #1 | Marshall | 2,410 | Transient non-community | Groundwater |
| Culver Educational Foundation | Marshall | 1,940 | Community | Groundwater |
| Bourbon Water Department | Marshall | 1,767 | Community | Groundwater |
| Argos Municipal Water Plant | Marshall | 1,680 | Community | Groundwater |
| Arbys Restaurant & Convenient Store 6375 | Marshall | 1,667 | 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, “Plymouth Water Department, PWSID IN5250010, Indiana”, https://aquacensus.com/water-systems/indiana/plymouth-water-department-in5250010 (data as of October 1, 2026).