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Clean Water Act discharge permit · NPDES MO0132519

WASHINGTON COUNTY PWSD 4 WWTP, Bismarck, MO: NPDES MO0132519 discharge permit, effluent exceedances, inspections, penalties

WASHINGTON COUNTY PWSD 4 WWTP, held by Washington County PWSD #4, holds NPDES permit MO0132519, which discharges to Tributary To Lost Creek. EPA’s file records it issued August 2, 2017 and expiring August 31, 2022.

WASHINGTON COUNTY PWSD 4 WWTP, Bismarck, Missouri: Individual permit MO0132519, held by Washington County PWSD #4; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued August 2, 2017, term to August 31, 2022; discharges to Tributary to Lost Creek.

  • BOD, 5-day, percent removal: 1 limit, 21 violations of any kind, 18 effluent exceedances, latest March 31, 2026, largest 567% over the limit.
  • Nitrogen, ammonia total [as N]: 6 limits, 25 violations of any kind, 17 effluent exceedances, latest June 30, 2026, largest 4,100% over the limit.
  • Solids, suspended percent removal: 1 limit, 19 violations of any kind, 15 effluent exceedances, latest March 31, 2026, largest 567% over the limit.
  • E. coli: 2 limits, 18 violations of any kind, 10 effluent exceedances, latest June 30, 2026, largest 99,999% over the limit.
  • Oxygen, dissolved [DO]: 2 limits, 12 violations of any kind, 4 effluent exceedances, latest December 31, 2025, largest 99,999% over the limit.
  • BOD, 5-day, 20 deg. C: 2 limits, 14 violations of any kind, 2 effluent exceedances, latest December 31, 2025, largest 44% over the limit.
  • Chlorine, total residual: 2 limits, 8 violations of any kind, 2 effluent exceedances, latest December 31, 2022, largest 46,567% over the limit.
  • Solids, total suspended: 2 limits, 13 violations of any kind, 1 effluent exceedance, latest June 30, 2019, largest 3% over the limit.
  • pH: 2 limits, 12 violations of any kind, 0 effluent exceedances.
  • Oil and grease [soxhlet extr.] tot.: 2 limits, 10 violations of any kind, 0 effluent exceedances.
  • Flow, in conduit or thru treatment plant: 2 limits, 10 violations of any kind, 0 effluent exceedances.
  • December 10, 2025: Effluent Violations - Numeric effluent violation (ST6).
  • March 31, 2025: Effluent Violations - Numeric effluent violation (ST6).
  • September 30, 2024: Effluent Violations - Numeric effluent violation (ST6).
  • May 24, 2024: Reporting Violations - Improper/ Incorrect Reporting (ST6).
  • January 26, 2024: Effluent Violations - Numeric effluent violation (ST6).
  • April 5, 2023: Effluent Violations - Numeric effluent violation (ST6).
  • December 27, 2022: Effluent Violations - Numeric effluent violation (ST6).
  • March 28, 2022: Effluent Violations - Numeric effluent violation (ST6).
  • September 22, 2020: Permit Violations - Violation Specified in Comment (ST6).
  • September 22, 2020: Effluent Violations - Numeric effluent violation (ST6).
  • December 31, 2019: Effluent Violations - Numeric effluent violation (ST6).
  • July 5, 2018: Reporting Violations - Improper/ Incorrect Reporting (ST6).

Missouri holds 756 Publicly owned treatment works coverages of this permit type in EPA’s file; 246 were issued before MO0132519.

Coverages issued nearest MO0132519

WASHINGTON COUNTY PWSD 4 WWTP among its neighbors

EPA’s permit file holds 2 discharge permits in the Cedar Creek subwatershed (HUC 071401040104), MO0132519 among them. Its county holds 64, 1 of them major permits; MO0132519 is a minor permit.

Other permits in the Cedar Creek subwatershed (HUC 071401040104)

  • CALEDONIA WWTF, Caledonia: MO0128571, minor permit, discharging to Tributary to Goose Cr., permit term to December 31, 2022

Identity

Facility as filedWASHINGTON COUNTY PWSD 4 WWTP
Permittee as filedWashington County PWSD #4
NPDES IDMO0132519
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
IssuedAugust 2, 2017
Expiration dateAugust 31, 2022
AddressBismarck, MO 63624
Receiving waterTributary to Lost Creek
SubwatershedCedar Creek (HUC 071401040104)
SIC4952 – Sewerage Systems

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
BOD, 5-day, percent removal12118March 31, 2026567% over the limit
Nitrogen, ammonia total [as N]62517June 30, 20264,100% over the limit
Solids, suspended percent removal11915March 31, 2026567% over the limit
E. coli21810June 30, 202699,999% over the limit
Oxygen, dissolved [DO]2124December 31, 202599,999% over the limit
BOD, 5-day, 20 deg. C2142December 31, 202544% over the limit
Chlorine, total residual282December 31, 202246,567% over the limit
Solids, total suspended2131June 30, 20193% over the limit
pH2120
Oil and grease [soxhlet extr.] tot.2100
Flow, in conduit or thru treatment plant2100

Inspections, violations and enforcement

DateWhat EPA recordedAgency
December 10, 2025Effluent Violations - Numeric effluent violationST6
March 31, 2025Effluent Violations - Numeric effluent violationST6
September 30, 2024Effluent Violations - Numeric effluent violationST6
May 24, 2024Reporting Violations - Improper/ Incorrect ReportingST6
January 26, 2024Effluent Violations - Numeric effluent violationST6
April 5, 2023Effluent Violations - Numeric effluent violationST6
December 27, 2022Effluent Violations - Numeric effluent violationST6
March 28, 2022Effluent Violations - Numeric effluent violationST6
September 22, 2020Permit Violations - Violation Specified in CommentST6
September 22, 2020Effluent Violations - Numeric effluent violationST6
December 31, 2019Effluent Violations - Numeric effluent violationST6
July 5, 2018Reporting Violations - Improper/ Incorrect ReportingST6

Inspections

EPA’s inspection file holds no inspection for NPDES MO0132519.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MO0132519.

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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 NPDES discharge permit MO0132519 held by Washington County PWSD #4 for the WASHINGTON COUNTY PWSD 4 WWTP in Bismarck, MO, which discharges to Tributary To Lost Creek within the Cedar Creek subwatershed (HUC 071401040104). The page lists 8 pollutants under a numeric limit and 11 pollutants with an effluent exceedance, and records the permit as administratively continued.