Public water system · MT0004249
ActiveClarks Lookout
At a glance
Clarks Lookout (PWSID MT0004249) is an active community water system in Beaverhead County, Montana. It reports serving 62 people through 43 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
62
Service connections
43
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Clarks Lookout compare with other water systems in Beaverhead County?
By EPA's size categories, Clarks Lookout is a very small system (500 people or fewer). Beaverhead County has 48 active public water systems. Its population served is well below the county average of 198 people per system, and accounts for 0.7% of the 9,494 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 Clarks Lookout 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Clarks Lookout?
EPA lists Clarks Lookout as privately owned. 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. 24 of the 48 active systems in Beaverhead County (50%) are also privately owned.
Does Clarks Lookout have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2025. The violations listed here began between October 2018 and October 2025. By type: 7 public notice, recordkeeping or other and 5 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (7 of them). 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 |
|---|---|---|---|---|
| 2025-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2024-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2019-10-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2019-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | 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.
Clarks Lookout: frequently asked questions
Who runs Clarks Lookout?
Clarks Lookout (PWSID MT0004249) is a community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Clarks Lookout serve?
Clarks Lookout reports serving 62 people through 43 service connections in Beaverhead County, Montana.
Where does Clarks Lookout 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 Clarks Lookout have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 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 Clarks Lookout'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, 5 are health-based, and the most recent began in October 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Clarks Lookout's water quality report?
As a community water system, Clarks Lookout 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 Beaverhead County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dillon City of | Beaverhead | 4,300 | Community | Groundwater |
| Town Pump Dillon 2 | Beaverhead | 924 | Transient non-community | Groundwater |
| Bannack St Park Visitor Center | Beaverhead | 410 | Transient non-community | Groundwater |
| Maverick Mountain Resort LLC | Beaverhead | 340 | Transient non-community | Groundwater under influence of surface water |
| Keller Subdivision No 2 Hoa | Beaverhead | 300 | Community | Groundwater |
| Hildreth Subdivision No 2 | Beaverhead | 300 | 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, “Clarks Lookout, PWSID MT0004249, Montana”, https://aquacensus.com/water-systems/montana/clarks-lookout-mt0004249 (data as of October 1, 2026).