Clean Water Act discharge permit · NPDES MO0105457

SUNSET TERRACE SUBDIVISION WWTF, Washington, MO: NPDES MO0105457 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
4Pollutants with an effluent exceedance

SUNSET TERRACE SUBDIVISION WWTF, held by Sunset Terrace HOA, holds NPDES permit MO0105457, which discharges to Tributary To Long Branch. EPA’s file records it issued April 1, 2018 and expiring June 30, 2021. 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	SUNSET TERRACE SUBDIVISION WWTF
Permittee as filed	Sunset Terrace HOA
NPDES ID	MO0105457
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	April 1, 2018
Expiration date	June 30, 2021
Address	Washington, MO 63090
Receiving water	Tributary to Long Branch
Subwatershed	Lower St Johns Creek (HUC 103002000503)
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

7Pollutants on file
5Under a numeric limit
7With a violation of any kind
4With 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
Ammonia [as N] + unionized ammonia	0	12	4	December 31, 2014	2,475% over the limit
Nitrogen, ammonia total [as N]	4	29	3	September 30, 2019	2,567% over the limit
Solids, total suspended	2	35	1	June 30, 2014	27% over the limit
E. coli	0	3	1	June 30, 2020	198% over the limit
BOD, 5-day, 20 deg. C	2	34	0
pH	2	34	0
Flow, in conduit or thru treatment plant	2	20	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 MO0105457.

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 MO0105457 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 MO0105457 for the Sunset Terrace Subdivision WWTF in Washington, MO, held by Sunset Terrace HOA, which discharges to Tributary to Long Branch in the Lower St Johns Creek subwatershed (HUC 103002000503). The page lists the permit as administratively continued, with 5 as the discharger class and 4 pollutants under a numeric limit and 4 pollutants with an effluent exceedance.