Public water system · MT0003522
ActiveHawarden Square Butte Water
At a glance
Hawarden Square Butte Water (PWSID MT0003522) is an active community water system in Chouteau County, Montana. It reports serving 50 people through 20 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
20
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Hawarden Square Butte Water compare with other water systems in Chouteau County?
By EPA's size categories, Hawarden Square Butte Water is a very small system (500 people or fewer). Chouteau County has 12 active public water systems. Its population served is well below the county average of 288 people per system, and accounts for 1.4% of the 3,456 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 Hawarden Square Butte Water 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 groundwater means the system buys groundwater from another public water system rather than drawing its own. 104 Montana systems (4.4%) list purchased groundwater as their primary source.
Who owns and regulates Hawarden Square Butte Water?
EPA lists Hawarden Square Butte Water 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. 9 of the 12 active systems in Chouteau County (75%) are also owned by a local government.
Does Hawarden Square Butte Water have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2023. The violations listed here began between December 1994 and August 2023. By type: 7 monitoring and reporting, 4 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (4 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2023-08-17 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Unaddressed |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2005-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2003-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Hawarden Square Butte Water: frequently asked questions
Who runs Hawarden Square Butte Water?
Hawarden Square Butte Water (PWSID MT0003522) is a community water system owned by a local government. It is regulated by the MT state drinking water program.
How many people does Hawarden Square Butte Water serve?
Hawarden Square Butte Water reports serving 50 people through 20 service connections in Chouteau County, Montana.
Where does Hawarden Square Butte Water get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Hawarden Square Butte Water have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2023. 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 Hawarden Square Butte Water'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, one is health-based, and the most recent began in August 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Hawarden Square Butte Water's water quality report?
As a community water system, Hawarden Square Butte Water 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 Chouteau County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fort Benton City of | Chouteau | 1,500 | Community | Groundwater |
| Big Sandy Town of | Chouteau | 608 | Community | Groundwater |
| Highwood County Water and Sewer District | Chouteau | 280 | Community | Groundwater |
| Geraldine Town of | Chouteau | 260 | Community | Groundwater |
| Loma County Water District | Chouteau | 200 | Community | Surface water |
| Carter Chouteau Co Water Dist | Chouteau | 150 | Community | 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, “Hawarden Square Butte Water, PWSID MT0003522, Montana”, https://aquacensus.com/water-systems/montana/hawarden-square-butte-water-mt0003522 (data as of October 1, 2026).