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Clean Water Act discharge permit · NPDES MO0101648

BLACKWATER WWTF, Blackwater, MO: NPDES MO0101648 discharge permit, effluent exceedances, inspections, penalties

BLACKWATER WWTF, held by City of Blackwater, holds NPDES permit MO0101648, which discharges to Tributary To Blackwater R.. EPA’s file records it issued March 20, 2018 and expiring June 30, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedBLACKWATER WWTF
Permittee as filedCity of Blackwater
NPDES IDMO0101648
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
IssuedMarch 20, 2018
Expiration dateJune 30, 2022
AddressBlackwater, MO 65322
Receiving waterTributary to Blackwater R.
SubwatershedBlackwater River (HUC 103001040508)

Cited to the EPA ICIS-NPDES permit file (ECHO 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]411274June 30, 2026886% over the limit
Solids, total suspended27321March 31, 202699,999% over the limit
E. coli22911October 31, 202499,999% over the limit
BOD, 5-day, 20 deg. C26210June 30, 2026137% over the limit
Solids, suspended percent removal11910June 30, 202699,999% over the limit
E. coli, colony forming units [CFU]099October 31, 2016932% over the limit
BOD, 5-day, percent removal1178September 30, 2020173% over the limit
pH1634March 31, 2023
Flow, in conduit or thru treatment plant2650
Oil and grease [soxhlet extr.] tot.2280
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
September 18, 2025Reporting Violations - Failure to Submit DMRsST6
June 18, 2025Reporting Violations - Failure to Submit DMRsST6
September 19, 2024Reporting Violations - Improper/ Incorrect ReportingST6
August 2, 2024Reporting Violations - Failure to Submit DMRsST6
December 14, 2022Permit Violations - Violation Specified in CommentST6
December 14, 2022Management Practice Violations - Improper Operation and MaintenanceST6
December 14, 2022Reporting Violations - Improper/ Incorrect ReportingST6
December 14, 2022Effluent Violations - Numeric effluent violationST6
December 29, 2020Effluent Violations - Numeric effluent violationST6
July 30, 2020Effluent Violations - Numeric effluent violationST6
July 30, 2020Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
July 30, 2020Permit Violations - Violation Specified in CommentST6
July 30, 2020Reporting Violations - Improper/ Incorrect ReportingST6
July 9, 2019Effluent Violations - Numeric effluent violationST6
July 9, 2019Reporting Violations - Failure to Submit DMRsST6
January 15, 2019Effluent Violations - Numeric effluent violationST6
January 15, 2019Reporting Violations - Failure to Submit DMRsST6
January 15, 2019Reporting Violations - Improper/ Incorrect ReportingST6
September 29, 2017Reporting Violations - Improper/ Incorrect ReportingST6
September 29, 2017Effluent Violations - Numeric effluent violationST6
June 30, 2017Effluent Violations - Numeric effluent violationST6
March 30, 2017Effluent 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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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 MO0101648 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers the Clean Water Act discharge permit NPDES MO0101648 for the BLACKWATER WWTF in Blackwater, MO, held by the City of Blackwater, which discharges to Tributary to Blackwater R. in the Blackwater River watershed (HUC 103001040508). The page lists 12 pollutants on file, 11 under a numeric limit, 10 with a violation of any kind, and 8 with an effluent exceedance, and it shows the permit as administratively continued with an expiration date of June 30, 2022.