WENTZVILLE, MO · St. Charles County
CHEROKEE LAKES/EL MAU SUBD Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of December 1, 1998. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in St. Charles County, MO.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Missouri’s official records. Always confirm current status with Missouri before making decisions based on this information.
System facts
- System ID (PWSID)
- MO6036215
- System type
- Community Water System
- Population served
- 100
- Service connections
- 38
- Ownership
- privately owned
- Water source
- groundwater (wells)
CHEROKEE LAKES/EL MAU SUBD is one of 1,412 community water systems in Missouri in the 500 or fewer people size category, formerly serving 100 people from groundwater.
EPA's federal records list this system as inactive in 1998; the record below is historical.
As of August 1, 2026, its federal record holds 5 entries between 1993 and 1997, all of which EPA lists as closed. Nothing has been added since 1997.
All 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, inorganic chemicals, and the Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Regular
—Nitrate-Nitrite
January 1, 1997 – December 31, 1997
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
September 1, 1996 – September 30, 1996
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
August 1, 1995 – August 31, 1995
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 1995 – May 31, 1995
ArchivedMonitoring, Regular
—Radium-226
October 1, 1993 – September 30, 1997
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1997 – December 31, 1997 | Monitoring, Regular | Nitrate-Nitrite | — | Archived |
| September 1, 1996 – September 30, 1996 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
| August 1, 1995 – August 31, 1995 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
| May 1, 1995 – May 31, 1995 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
| October 1, 1993 – September 30, 1997 | Monitoring, Regular | Radium-226 | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
No enforcement actions on record for this system.
Last known contact on file (system is inactive)
Not on record
314-282-4979
WENTZVILLE, MO 63385