Public water system · KY0480277
ActiveBlack Mtn Utility/Dayhoit
At a glance
Black Mtn Utility/Dayhoit (PWSID KY0480277) is an active community water system in Harlan County, Kentucky. It reports serving 1,954 people through 451 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,954
Service connections
451
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Black Mtn Utility/Dayhoit compare with other water systems in Harlan County?
By EPA's size categories, Black Mtn Utility/Dayhoit is a small system (501 to 3,300 people). Harlan County has 17 active public water systems, and Black Mtn Utility/Dayhoit is the 5th-largest of them by population served. Its population served is about 21% above the county average of 1,611 people per system, and accounts for 7.1% of the 27,378 people reported by systems filed under the county. Across Kentucky, the 437 active systems average 11,699 people each. Nationally, the average active community water system reports serving 6,703 people, so Black Mtn Utility/Dayhoit 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. Kentucky has 371 active community water systems, 85% of the state's 437 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 167 Kentucky systems (38%) list purchased surface water as their primary source.
Who owns and regulates Black Mtn Utility/Dayhoit?
EPA lists Black Mtn Utility/Dayhoit as privately owned. The KY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 17 active systems in Harlan County (35%) are also privately owned.
Does Black Mtn Utility/Dayhoit have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2025. The violations listed here began between July 2002 and November 2025. By type: 6 monitoring and reporting, 4 public notice, recordkeeping or other, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (4 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 |
|---|---|---|---|---|
| 2025-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2022-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2017-01-01 | Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | 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.
Black Mtn Utility/Dayhoit: frequently asked questions
Who runs Black Mtn Utility/Dayhoit?
Black Mtn Utility/Dayhoit (PWSID KY0480277) is a community water system privately owned. It is regulated by the KY state drinking water program.
How many people does Black Mtn Utility/Dayhoit serve?
Black Mtn Utility/Dayhoit reports serving 1,954 people through 451 service connections in Harlan County, Kentucky.
Where does Black Mtn Utility/Dayhoit 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 Black Mtn Utility/Dayhoit 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 November 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 Black Mtn Utility/Dayhoit'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 November 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the KY state drinking water program.
Where can I find Black Mtn Utility/Dayhoit's water quality report?
As a community water system, Black Mtn Utility/Dayhoit 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 Harlan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Harlan Municipal Water Works | Harlan | 4,574 | Community | Surface water |
| Cawood Water District | Harlan | 4,428 | Community | Surface water |
| Evarts Municipal Water Plant | Harlan | 3,059 | Community | Groundwater under influence of surface water |
| Cumberland Municipal Water Works | Harlan | 2,843 | Community | Surface water |
| Black Mtn Utility/Rosspoint | Harlan | 1,889 | Community | Purchased surface water |
| Black Mtn Utility/Wallins | Harlan | 1,485 | 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, “Black Mtn Utility/Dayhoit, PWSID KY0480277, Kentucky”, https://aquacensus.com/water-systems/kentucky/black-mtn-utility-dayhoit-ky0480277 (data as of October 1, 2026).