Public water system · MO5036186
ActiveTwin Island Estates
At a glance
Twin Island Estates (PWSID MO5036186) is an active community water system in Stone County, Missouri. It reports serving 525 people through 219 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
525
Service connections
219
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Twin Island Estates compare with other water systems in Stone County?
By EPA's size categories, Twin Island Estates is a small system (501 to 3,300 people). Stone County has 228 active public water systems. Its population served is about 159% above the county average of 203 people per system, and accounts for 1.1% of the 46,191 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active community water system reports serving 6,703 people, so Twin Island Estates 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. Missouri has 1,612 active community water systems, 55% 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 Twin Island Estates?
EPA lists Twin Island Estates 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. 213 of the 228 active systems in Stone County (93%) are also privately owned.
Does Twin Island Estates have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2009. The violations listed here began between October 2005 and October 2009. By type: 3 monitoring and reporting. The contaminants or rules involved are Total coliform bacteria (TCR), Nitrate-Nitrite and Lead and Copper Rule. EPA lists 3 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 |
|---|---|---|---|---|
| 2009-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2005-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
All 3 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.
Twin Island Estates: frequently asked questions
Who runs Twin Island Estates?
Twin Island Estates (PWSID MO5036186) is a community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Twin Island Estates serve?
Twin Island Estates reports serving 525 people through 219 service connections in Stone County, Missouri.
Where does Twin Island Estates 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 Twin Island Estates have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2009. 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 Twin Island Estates' 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 3 violations for this system; none is health-based, and the most recent began in October 2009. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Twin Island Estates' water quality report?
As a community water system, Twin Island Estates 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 Stone County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Silver Dollar City Marvel Cave | Stone | 8,501 | Non-transient non-community | Groundwater |
| Mo American Stonebridge Village | Stone | 2,100 | Community | Groundwater |
| Stone County Pwsd 1 | Stone | 2,052 | Community | Groundwater |
| Kanakuk Kamp No 2 | Stone | 2,000 | Transient non-community | Groundwater |
| Pwsd 2 of Stone County 265 | Stone | 1,535 | Community | Groundwater |
| Crane Pws | Stone | 1,495 | 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, “Twin Island Estates, PWSID MO5036186, Missouri”, https://aquacensus.com/water-systems/missouri/twin-island-estates-mo5036186 (data as of October 1, 2026).