Public water system · OH7000312
ActiveColonial Hills MHP
At a glance
Colonial Hills MHP (PWSID OH7000312) is an active community water system in Richland County, Ohio. It reports serving 185 people through 77 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 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
185
Service connections
77
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Colonial Hills MHP compare with other water systems in Richland County?
By EPA's size categories, Colonial Hills MHP is a very small system (500 people or fewer). Richland County has 106 active public water systems. Its population served is well below the county average of 942 people per system, and accounts for 0.2% of the 99,812 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 Hills MHP 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 Hills MHP?
EPA lists Colonial Hills MHP 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. 94 of the 106 active systems in Richland County (89%) are also privately owned.
Does Colonial Hills MHP 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 2020. The violations listed here began between April 2001 and January 2020. By type: 10 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Consumer Confidence Rule (2 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 |
|---|---|---|---|---|
| 2020-01-09 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2006-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | 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 |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbofurancode 2046 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Diquatcode 2032 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Lindane (gamma-BHC)code 2010 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzo(a)pyrenecode 2306 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Glyphosatecode 2034 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endothallcode 2033 | 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 Hills MHP: frequently asked questions
Who runs Colonial Hills MHP?
Colonial Hills MHP (PWSID OH7000312) is a community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Colonial Hills MHP serve?
Colonial Hills MHP reports serving 185 people through 77 service connections in Richland County, Ohio.
Where does Colonial Hills MHP 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 Hills MHP 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 2020. 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 Hills MHP'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 2020. 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 Hills MHP's water quality report?
As a community water system, Colonial Hills MHP 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 Richland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mansfield City | Richland | 51,000 | Community | Surface water |
| Shelby City | Richland | 9,453 | Community | Surface water |
| Ontario City | Richland | 6,756 | Community | Groundwater |
| Lexington Village | Richland | 4,825 | Community | Groundwater |
| Madison Water District | Richland | 2,050 | Community | Groundwater |
| Bellville Village | Richland | 1,918 | 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 Hills MHP, PWSID OH7000312, Ohio”, https://aquacensus.com/water-systems/ohio/colonial-hills-mhp-oh7000312 (data as of October 1, 2026).