Clean Water Act discharge permit · NPDES MO0120022

MAPLE LEAF WWTF, Holts Summit, MO: NPDES MO0120022 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
6Pollutants under a numeric limit
1Pollutants with an effluent exceedance

MAPLE LEAF WWTF, held by Missouri-American Water Company, holds NPDES permit MO0120022, which discharges to Tributary To Cason Br.. EPA’s file records it issued September 16, 2020 and expiring June 30, 2025. 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	MAPLE LEAF WWTF
Permittee as filed	Missouri-American Water Company
NPDES ID	MO0120022
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	September 16, 2020
Expiration date	June 30, 2025
Address	Holts Summit, MO 65043
Receiving water	Tributary to Cason Br.
Subwatershed	Hillers Creek (HUC 103001021403)
SIC	4952 – Sewerage Systems

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

6Pollutants on file
6Under a numeric limit
2With a violation of any kind
1With 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
Nitrogen, ammonia total [as N]	10	17	17	June 30, 2026	1,270% over the limit
pH	2	1	0
BOD, 5-day, 20 deg. C	2	0	0
Solids, total suspended	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES MO0120022.

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 MO0120022 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 MO0120022 for the MAPLE LEAF WWTF in Holts Summit, MO, held by Missouri-American Water Company and discharging to Tributary To Cason Br. within the Hillers Creek (HUC 103001021403) subwatershed. The page lists the permit as Effective, with the EPA file showing issuance on September 16, 2020 and expiration on June 30, 2025. The facility shows 6 pollutants on file, 6 under a numeric limit, 2 with a violation of any kind, and 1 with an effluent exceedance.