Public water system · MO6010716
ActiveMo American St Louis St Charles Counties
At a glance
Mo American St Louis St Charles Counties (PWSID MO6010716) is an active community water system serving St. Louis and St. Charles counties, Missouri. It reports serving 1,111,000 people through 376,501 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in June 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,111,000
Service connections
376,501
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Mo American St Louis St Charles Counties compare with other water systems in Missouri?
By EPA's size categories, Mo American St Louis St Charles Counties is a very large system (more than 100,000 people). 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 Mo American St Louis St Charles Counties is about 166 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 60 Missouri systems (2%) list surface water as their primary source.
Who owns and regulates Mo American St Louis St Charles Counties?
EPA lists Mo American St Louis St Charles Counties 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.
Does Mo American St Louis St Charles Counties have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in June 2010. The violations listed here began between June 2005 and June 2010. By type: 2 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Interim Enhanced Surface Water Treatment Rule (3 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2010-06-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2007-08-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2005-06-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Archived |
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.
Mo American St Louis St Charles Counties: frequently asked questions
Who runs Mo American St Louis St Charles Counties?
Mo American St Louis St Charles Counties (PWSID MO6010716) is a community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Mo American St Louis St Charles Counties serve?
Mo American St Louis St Charles Counties reports serving 1,111,000 people through 376,501 service connections in St. Louis and St. Charles counties, Missouri.
Where does Mo American St Louis St Charles Counties get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Mo American St Louis St Charles Counties have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in June 2010. 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 Mo American St Louis St Charles Counties' 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; 2 are health-based, and the most recent began in June 2010. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Mo American St Louis St Charles Counties' water quality report?
As a community water system, Mo American St Louis St Charles Counties 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. Louis County(the first county EPA lists for this system)
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kirkwood Pws | St. Louis | 28,000 | Community | Purchased surface water |
| Six Flags St Louis | St. Louis | 3,200 | Non-transient non-community | Groundwater |
| Mo Eastern Correctional Center | St. Louis | 1,100 | Community | Groundwater |
| Rockwoods Reservation | St. Louis | 550 | Transient non-community | Groundwater |
| Babler State Park | St. Louis | 500 | Transient non-community | Groundwater |
| Mo American Pevely Farms | St. Louis | 343 | 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, “Mo American St Louis St Charles Counties, PWSID MO6010716, Missouri”, https://aquacensus.com/water-systems/missouri/mo-american-st-louis-st-charles-counties-mo6010716 (data as of October 1, 2026).