Public water system · MT0004348
ActiveDry Prairie Rural Water Authority
At a glance
Dry Prairie Rural Water Authority (PWSID MT0004348) is an active community water system in Roosevelt County, Montana. It reports serving 3,005 people through 1,911 service connections. Its primary water source is purchased surface water, and EPA lists it as under public/private ownership. EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,005
Service connections
1,911
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Dry Prairie Rural Water Authority compare with other water systems in Roosevelt County?
By EPA's size categories, Dry Prairie Rural Water Authority is a small system (501 to 3,300 people). Roosevelt County has 4 active public water systems, and Dry Prairie Rural Water Authority is the largest of them by population served. Its population served is about 166% above the county average of 1,130 people per system, and accounts for 66% of the 4,519 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 Dry Prairie Rural Water Authority is about 55% 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 Dry Prairie Rural Water Authority?
EPA lists Dry Prairie Rural Water Authority as under public/private ownership. 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. 1 of the 4 active systems in Roosevelt County (25%) are also under public/private ownership.
Does Dry Prairie Rural Water Authority have drinking water violations?
EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 2024. The violations listed here began between January 2005 and October 2024. By type: 6 monitoring and reporting and 5 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (5 of them). EPA lists 8 as resolved, 2 as archived and 1 as unaddressed. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2015-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2014-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2005-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 11 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.
Dry Prairie Rural Water Authority: frequently asked questions
Who runs Dry Prairie Rural Water Authority?
Dry Prairie Rural Water Authority (PWSID MT0004348) is a community water system under public/private ownership. It is regulated by the MT state drinking water program.
How many people does Dry Prairie Rural Water Authority serve?
Dry Prairie Rural Water Authority reports serving 3,005 people through 1,911 service connections in Roosevelt County, Montana.
Where does Dry Prairie Rural Water Authority 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 Dry Prairie Rural Water Authority have any drinking water violations?
EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 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 Dry Prairie Rural Water Authority'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 11 violations for this system; 5 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Dry Prairie Rural Water Authority's water quality report?
As a community water system, Dry Prairie Rural Water Authority 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 Roosevelt County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Culbertson Town of | Roosevelt | 714 | Community | Purchased surface water |
| Froid Town of | Roosevelt | 450 | Community | Purchased surface water |
| Bainville Town of | Roosevelt | 350 | 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, “Dry Prairie Rural Water Authority, PWSID MT0004348, Montana”, https://aquacensus.com/water-systems/montana/dry-prairie-rural-water-authority-mt0004348 (data as of October 1, 2026).