Public water system · MO4180578
ActiveRapco Horizon County
At a glance
Rapco Horizon County (PWSID MO4180578) is an active non-transient non-community water system in Cape Girardeau County, Missouri. It reports serving 100 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Rapco Horizon County compare with other water systems in Cape Girardeau County?
By EPA's size categories, Rapco Horizon County is a very small system (500 people or fewer). Cape Girardeau County has 29 active public water systems. Its population served is well below the county average of 2,537 people per system, and accounts for 0.1% of the 73,571 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Rapco Horizon County is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Missouri has 228 active non-transient non-community water systems, 7.7% of the state's 2,943 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,521 Missouri systems (86%) list groundwater as their primary source.
Who owns and regulates Rapco Horizon County?
EPA lists Rapco Horizon County as privately owned. The MO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 18 of the 29 active systems in Cape Girardeau County (62%) are also privately owned.
Does Rapco Horizon County have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2025. The violations listed here began between January 1995 and October 2025. By type: 5 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Groundwater Rule (3 of them). EPA lists 5 as resolved and 1 as archived. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2023-07-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Groundwater Rulecode 0700 | Yes | Resolved |
| 1999-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
All 6 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.
Rapco Horizon County: frequently asked questions
Who runs Rapco Horizon County?
Rapco Horizon County (PWSID MO4180578) is a non-transient non-community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Rapco Horizon County serve?
Rapco Horizon County reports serving 100 people through 3 service connections in Cape Girardeau County, Missouri.
Where does Rapco Horizon County 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 Rapco Horizon County have any drinking water violations?
EPA's records list 6 violations for this system; 1 is 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 Rapco Horizon County'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. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the MO state drinking water program.
Where can I find Rapco Horizon County's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Rapco Horizon County is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Cape Girardeau County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cape Girardeau Pws | Cape Girardeau | 39,941 | Community | Groundwater |
| Jackson Pws | Cape Girardeau | 15,000 | Community | Groundwater |
| Cape Perry County Pwsd 1 South | Cape Girardeau | 8,545 | Community | Groundwater |
| Cape Girardeau County Pwsd 2 | Cape Girardeau | 2,913 | Community | Groundwater |
| Cape Girardeau County Pwsd 4 | Cape Girardeau | 1,743 | Community | Groundwater |
| Procter & Gamble Paper Prod Co | Cape Girardeau | 1,200 | Non-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, “Rapco Horizon County, PWSID MO4180578, Missouri”, https://aquacensus.com/water-systems/missouri/rapco-horizon-county-mo4180578 (data as of October 1, 2026).