Public water system · MO6011147
ActiveEcm Water & Sewer Authority - Flint Hill
At a glance
Ecm Water & Sewer Authority - Flint Hill (PWSID MO6011147) is an active community water system in St. Charles County, Missouri. It reports serving 469 people through 188 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in December 2011.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
469
Service connections
188
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Ecm Water & Sewer Authority - Flint Hill compare with other water systems in St. Charles County?
By EPA's size categories, Ecm Water & Sewer Authority - Flint Hill is a very small system (500 people or fewer). St. Charles County has 54 active public water systems. Its population served is well below the county average of 5,867 people per system, and accounts for 0.1% of the 316,837 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 Ecm Water & Sewer Authority - Flint Hill 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 Ecm Water & Sewer Authority - Flint Hill?
EPA lists Ecm Water & Sewer Authority - Flint Hill as owned by a local government. 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. 20 of the 54 active systems in St. Charles County (37%) are also owned by a local government.
Does Ecm Water & Sewer Authority - Flint Hill have drinking water violations?
EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in December 2011. The violations listed here began between April 1993 and December 2011. By type: 2 monitoring and reporting, 2 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2011-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2004-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1993-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
All 5 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.
Ecm Water & Sewer Authority - Flint Hill: frequently asked questions
Who runs Ecm Water & Sewer Authority - Flint Hill?
Ecm Water & Sewer Authority - Flint Hill (PWSID MO6011147) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Ecm Water & Sewer Authority - Flint Hill serve?
Ecm Water & Sewer Authority - Flint Hill reports serving 469 people through 188 service connections in St. Charles County, Missouri.
Where does Ecm Water & Sewer Authority - Flint Hill 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 Ecm Water & Sewer Authority - Flint Hill have any drinking water violations?
EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in December 2011. 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 Ecm Water & Sewer Authority - Flint Hill'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 5 violations for this system; 2 are health-based, and the most recent began in December 2011. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Ecm Water & Sewer Authority - Flint Hill's water quality report?
As a community water system, Ecm Water & Sewer Authority - Flint Hill 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 St. Charles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| St Charles County Pwsd 2 | St. Charles | 100,587 | Community | Purchased surface water |
| St Charles Pws | St. Charles | 78,961 | Community | Purchased surface water |
| St Peters Pws | St. Charles | 52,575 | Community | Purchased surface water |
| Wentzville Pws | St. Charles | 41,784 | Community | Groundwater |
| Ofallon Pws | St. Charles | 32,515 | Community | Purchased surface water |
| St Paul Pws | St. Charles | 1,700 | 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, “Ecm Water & Sewer Authority - Flint Hill, PWSID MO6011147, Missouri”, https://aquacensus.com/water-systems/missouri/ecm-water-sewer-authority-flint-hill-mo6011147 (data as of October 1, 2026).