Public water system · MT0000306
ActivePlentywood Water Department
At a glance
Plentywood Water Department (PWSID MT0000306) is an active community water system in Sheridan County, Montana. It reports serving 1,700 people through 962 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,700
Service connections
962
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Plentywood Water Department compare with other water systems in Sheridan County?
By EPA's size categories, Plentywood Water Department is a small system (501 to 3,300 people). Sheridan County has 8 active public water systems, and Plentywood Water Department is the largest of them by population served. Its population served is about 4.9 times the county average of 346 people per system, and accounts for 62% of the 2,764 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active community water system reports serving 6,703 people, so Plentywood Water Department 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. Montana has 853 active community water systems, 36% of the state's 2,378 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 212 Montana systems (8.9%) list purchased surface water as their primary source.
Who owns and regulates Plentywood Water Department?
EPA lists Plentywood Water Department as owned by a local government. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 8 active systems in Sheridan County (63%) are also owned by a local government.
Does Plentywood Water Department have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2017. The violations listed here began between September 2001 and January 2017. By type: 2 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2017-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2001-09-05 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 2 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.
Plentywood Water Department: frequently asked questions
Who runs Plentywood Water Department?
Plentywood Water Department (PWSID MT0000306) is a community water system owned by a local government. It is regulated by the MT state drinking water program.
How many people does Plentywood Water Department serve?
Plentywood Water Department reports serving 1,700 people through 962 service connections in Sheridan County, Montana.
Where does Plentywood Water Department 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 Plentywood Water Department have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2017. 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 Plentywood 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. EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Plentywood Water Department's water quality report?
As a community water system, Plentywood 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 Sheridan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Medicine Lake Town of | Sheridan | 600 | Community | Purchased surface water |
| Westby Town of | Sheridan | 172 | Community | Purchased surface water |
| Outlook County Sewer and Water | Sheridan | 96 | Community | Groundwater |
| Antelope County Water and Sewer | Sheridan | 59 | Community | Purchased surface water |
| Brush Lake State Park | Sheridan | 58 | Transient non-community | Purchased surface water |
| Sunset Camping LLC | Sheridan | 42 | Transient non-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, “Plentywood Water Department, PWSID MT0000306, Montana”, https://aquacensus.com/water-systems/montana/plentywood-water-department-mt0000306 (data as of October 1, 2026).