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Clean Water Act discharge permit · NPDES MO0108090

LA MONTE NW WWTF, La Monte, MO: NPDES MO0108090 discharge permit, effluent exceedances, inspections, penalties

LA MONTE NW WWTF, held by City of La Monte, holds NPDES permit MO0108090, which discharges to Tributary To Trib. To S. Fk. Blackwater R.. EPA’s file records it issued September 15, 2017 and expiring September 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 filedLA MONTE NW WWTF
Permittee as filedCity of La Monte
NPDES IDMO0108090
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 15, 2017
Expiration dateSeptember 30, 2021
AddressLa Monte, MO 65337
Receiving waterTributary to Trib. to S. Fk. Blackwater R.
SubwatershedBeaverdam Creek-South Fork Blackwater River (HUC 103001040501)
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
Solids, suspended percent removal184April 30, 2025109% over the limit
Solids, total suspended2112June 30, 202433% over the limit
BOD, 5-day, 20 deg. C291April 30, 20194% over the limit
pH1400
E. coli280
Nitrogen, ammonia total [as N]260
Flow, in conduit or thru treatment plant260
Oil and grease [soxhlet extr.] tot.240
BOD, 5-day, percent removal140
Toxicity [acute], Ceriodaphnia dubia100
Toxicity [acute], Pimephales promelas [Fathead Minnow]100

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
March 28, 2025Reporting Violations - Improper/ Incorrect ReportingST6
March 28, 2025Effluent Violations - Numeric effluent violationST6
January 10, 2024Permit Violations - Violation Specified in CommentST6
January 10, 2024Reporting Violations - Improper/ Incorrect ReportingST6
August 28, 2019Reporting Violations - Improper/ Incorrect ReportingST6
August 28, 2019Reporting Violations - Failure to Submit DMRsST6
August 28, 2019Permit Violations - Violation Specified in CommentST6
August 28, 2019Effluent Violations - Numeric effluent violationST6

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 the Clean Water Act discharge permit NPDES MO0108090 for the LA MONTE NW WWTF in La Monte, MO, held by City of La Monte, with its status shown as administratively continued and its discharger class as minor. The page lists 3 pollutants under a numeric limit and 11 pollutants with an effluent exceedance, and it names Beaverdam Creek-South Fork Blackwater River (HUC 103001040501) as the subwatershed.