Public water system · OH4201512
ActiveColonial Terrace Mhc LLC
At a glance
Colonial Terrace Mhc LLC (PWSID OH4201512) is an active community water system in Knox County, Ohio. It reports serving 110 people through 63 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, none is health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
110
Service connections
63
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Colonial Terrace Mhc LLC compare with other water systems in Knox County?
By EPA's size categories, Colonial Terrace Mhc LLC is a very small system (500 people or fewer). Knox County has 40 active public water systems. Its population served is well below the county average of 877 people per system, and accounts for 0.3% of the 35,064 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active community water system reports serving 6,703 people, so Colonial Terrace Mhc LLC 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. Ohio has 1,028 active community water systems, 27% of the state's 3,854 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.
Who owns and regulates Colonial Terrace Mhc LLC?
EPA lists Colonial Terrace Mhc LLC as privately owned. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 36 of the 40 active systems in Knox County (90%) are also privately owned.
Does Colonial Terrace Mhc LLC have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2026. The violations listed here began between January 2004 and January 2026. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 11 as resolved 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. 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 |
|---|---|---|---|---|
| 2026-01-14 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2022-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2015-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2009-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2004-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-01-01 | 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.
Colonial Terrace Mhc LLC: frequently asked questions
Who runs Colonial Terrace Mhc LLC?
Colonial Terrace Mhc LLC (PWSID OH4201512) is a community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Colonial Terrace Mhc LLC serve?
Colonial Terrace Mhc LLC reports serving 110 people through 63 service connections in Knox County, Ohio.
Where does Colonial Terrace Mhc LLC 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 Colonial Terrace Mhc LLC have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2026. 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 Colonial Terrace Mhc LLC'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, none is health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Colonial Terrace Mhc LLC's water quality report?
As a community water system, Colonial Terrace Mhc LLC 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 Knox County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mount Vernon City Pws | Knox | 16,990 | Community | Groundwater |
| Knox County Water and Wastewater Pws | Knox | 7,710 | Community | Groundwater |
| Fredericktown Village | Knox | 2,648 | Community | Groundwater |
| Gambier Village Pws | Knox | 2,300 | Community | Purchased groundwater |
| Danville Village Pws | Knox | 994 | Community | Groundwater |
| Rustic Knolls Campground | Knox | 600 | Transient non-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, “Colonial Terrace Mhc LLC, PWSID OH4201512, Ohio”, https://aquacensus.com/water-systems/ohio/colonial-terrace-mhc-llc-oh4201512 (data as of October 1, 2026).