Public water system · MO6213036

Active

Thies Farm

At a glance

Thies Farm (PWSID MO6213036) is an active transient non-community water system in St. Charles County, Missouri. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in September 2017.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDMO6213036

System typeTransient non-community water system

Activity statusActive

Population served25

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyMO state drinking water program

City servedSt. Charles

StateMissouri

ZIP—

CountySt. Charles County

How does Thies Farm compare with other water systems in St. Charles County?

By EPA's size categories, Thies Farm 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 less than 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 transient non-community water system reports serving 144 people, so Thies Farm is well below that figure.

What does “transient non-community water system” mean?

A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Missouri has 1,103 active transient non-community water systems, 37% 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 Thies Farm?

EPA lists Thies Farm 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. 33 of the 54 active systems in St. Charles County (61%) are also privately owned.

Does Thies Farm have drinking water violations?

EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in September 2017. The violations listed here began between June 2014 and September 2017. By type: 3 public notice, recordkeeping or other, 3 monitoring and reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 8 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
2017-09-20	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2017-07-10	Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A	Revised Total Coliform Rulecode 8000	Yes	Resolved
2015-08-05	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2015-02-10	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2014-12-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2014-11-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2014-08-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2014-06-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved

All 8 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.

Thies Farm: frequently asked questions

Who runs Thies Farm?

Thies Farm (PWSID MO6213036) is a transient non-community water system privately owned. It is regulated by the MO state drinking water program.

How many people does Thies Farm serve?

Thies Farm reports serving 25 people through 1 service connection in St. Charles County, Missouri.

Where does Thies Farm 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 Thies Farm have any drinking water violations?

EPA's records list 8 violations for this system; 2 are health-based, and the most recent began in September 2017. 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 Thies Farm'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 8 violations for this system; 2 are health-based, and the most recent began in September 2017. For current results, consult EPA ECHO, or the MO state drinking water program.

Where can I find Thies Farm's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Thies Farm is a 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 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, “Thies Farm, PWSID MO6213036, Missouri”, https://aquacensus.com/water-systems/missouri/thies-farm-mo6213036 (data as of October 1, 2026).