Clean Water Act discharge permit · NPDES MO0111261

MAWC RADCLIFFE PLACE SUBDIVISION WWTF, Eureka, MO: NPDES MO0111261 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
6Pollutants under a numeric limit
3Pollutants with an effluent exceedance

MAWC RADCLIFFE PLACE SUBDIVISION WWTF, held by Missouri American Water Co, holds NPDES permit MO0111261, which discharges to Hamilton Cr.. EPA’s file records it issued November 29, 2017 and expiring September 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	MAWC RADCLIFFE PLACE SUBDIVISION WWTF
Permittee as filed	Missouri American Water Co
NPDES ID	MO0111261
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	November 29, 2017
Expiration date	September 30, 2022
Address	Eureka, MO 63025
Receiving water	Hamilton Cr.
Subwatershed	Hamilton Creek-Meramec River (HUC 071401021001)
SIC	8641 – Civic And Social Associations

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

7Pollutants on file
6Under a numeric limit
3With a violation of any kind
3With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
pH	2	11	11	December 31, 2025
Coliform, fecal general	0	5	3	October 31, 2009	275% over the limit
Solids, total suspended	2	2	2	June 30, 2018	62% over the limit
Nitrogen, ammonia total [as N]	4	0	0
BOD, 5-day, 20 deg. C	2	0	0
Flow, in conduit or thru treatment plant	2	0	0
E. coli	2	0	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

4Single-event violations

Date	What EPA recorded	Agency
May 15, 2023	Effluent Violations - Unauthorized Discharge	ST6
April 12, 2018	Permit Violations - Violation Specified in Comment	ST6
April 12, 2018	Reporting Violations - Improper/ Incorrect Reporting	ST6
April 12, 2018	Management Practice Violations - Improper Operation and Maintenance	ST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MO0111261 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers Clean Water Act discharge permit NPDES MO0111261 for the MAWC RADCLIFFE PLACE SUBDIVISION WWTF in Eureka, MO, held by Missouri American Water Co and discharging to Hamilton Cr. The permit is listed as administratively continued, with a permit status of Minor Discharger class 6, 3 pollutants under a numeric limit, and 3 pollutants with an effluent exceedance. The permit's issue date is November 29, 2017 and its expiration date is September 30, 2022, as stood when the record was loaded on October 14, 2026.