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Clean Water Act discharge permit · NPDES MO0025283

UNION WEST WWTF, Union, MO: NPDES MO0025283 discharge permit, effluent exceedances, inspections, penalties

UNION WEST WWTF, held by Union, City of, holds NPDES permit MO0025283, which discharges to Bourbeuse R.. EPA’s file records it issued June 3, 2016 and expiring June 30, 2020. 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 filedUNION WEST WWTF
Permittee as filedUnion, City of
NPDES IDMO0025283
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedJune 3, 2016
Expiration dateJune 30, 2020
AddressUnion, MO 63084
Receiving waterBourbeuse R.
Receiving water impaired303(D) Listed
SubwatershedBirch Creek-Bourbuse River (HUC 071401030405)
Program components on filePOTW, Pretreatment
SIC4952 – 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

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, ammonia total [as N]48383November 30, 2020550% over the limit
Chlorine, total residual01917April 30, 20063,233% over the limit
Copper, total recoverable2119January 31, 2013142% over the limit
Ammonia [as N] + unionized ammonia01073November 30, 2009900% over the limit
Solids, total suspended333March 31, 2010109% over the limit
Coliform, fecal general082June 30, 200724,999,900% over the limit
Chromium, hexavalent dissolved [as Cr]222September 30, 2016155% over the limit
E. coli, colony forming units [CFU]022July 31, 2015217% over the limit
pH2881August 31, 2004
BOD, 5-day, 20 deg. C311March 31, 201018% over the limit
Zinc, total recoverable21020
CBOD5+NH3-N0880
Cadmium, total recoverable0820
Iron, total recoverable2800
Chromium, total recoverable0800
Silver total recoverable0780
Phosphorus, total [as P]440
Nitrogen, total [as N]420
Arsenic, total recoverable220
Nickel, total recoverable220
Lead, total recoverable220
Mercury, total recoverable220
Hardness, total [as CaCO3]020
Pass/Fail Static 48Hr Acute Ceriodaphnia dubia020
LC50 Static 48Hr Acute Pimephales promelas020
Toxicity [acute], Ceriodaphnia dubia210
Toxicity [acute], Pimephales promelas [Fathead Minnow]210
Oil and grease [soxhlet extr.] tot.200
Aluminum, total recoverable200
Chromium, trivalent total recoverable200
Flow, in conduit or thru treatment plant200
E. coli200

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

DateWhat EPA recordedAgency
May 13, 2026Reporting Violations - Failure to Submit DMRsST6
November 5, 2024Permit Violations - Violation Specified in CommentST6
November 5, 2024Pretreatment - Failure to Develop/Enforce StandardsST6
June 29, 2023Management Practice Violations - Improper Operation and MaintenanceST6
June 29, 2023Permit Violations - Violation Specified in CommentST6
June 29, 2023Reporting Violations - Improper/ Incorrect ReportingST6
September 15, 2022Permit Violations - Violation Specified in CommentST6
November 20, 2020Reporting Violations - Improper/ Incorrect ReportingST6
October 10, 2019Permit Violations - Violation Specified in CommentST6
September 9, 2019Pretreatment - Failure to Develop/Enforce StandardsST6
March 16, 2017Pretreatment - Failure to Develop/Enforce StandardsST6

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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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MO0025283 for UNION WEST WWTF in Union, MO, held by Union, City of, with a status of administratively continued and a discharger class of Major. The page lists 21 pollutants under a numeric limit and 10 pollutants with an effluent exceedance.