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Clean Water Act discharge permit · NPDES WA0020575

ENUMCLAW STP, Enumclaw, WA: NPDES WA0020575 discharge permit, effluent exceedances, inspections, penalties

ENUMCLAW STP, held by City of Enumclaw, holds NPDES permit WA0020575. EPA’s file records it issued April 10, 2003 and expiring April 29, 2008.

ENUMCLAW STP, Enumclaw, Washington: Individual permit WA0020575, held by City of Enumclaw; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued April 10, 2003, term to April 29, 2008, by State.

  • Copper, total [as Cu]: 4 limits, 28 violations of any kind, 28 effluent exceedances, latest August 31, 2010, largest 79% over the limit.
  • BOD, 5-day, 20 deg. C: 8 limits, 31 violations of any kind, 9 effluent exceedances, latest February 28, 2007, largest 25% over the limit.
  • Solids, total suspended: 4 limits, 4 violations of any kind, 4 effluent exceedances, latest March 31, 2022, largest 53% over the limit.
  • Nitrogen, ammonia total [as N]: 3 limits, 4 violations of any kind, 3 effluent exceedances, latest June 30, 2011, largest 71% over the limit.
  • Solids, suspended percent removal: 1 limit, 60 violations of any kind, 1 effluent exceedance, latest January 31, 2006, largest 20% over the limit.
  • BOD, percent removal [total]: 1 limit, 118 violations of any kind, 0 effluent exceedances.
  • pH: 0 limits, 16 violations of any kind, 0 effluent exceedances.
  • Temperature, water deg. centigrade: 2 limits, 3 violations of any kind, 0 effluent exceedances.
  • Oxygen, dissolved [DO]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Alkalinity, total [as CaCO3]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Hardness, total [as CaCO3]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Rainfall: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Coliform, fecal general: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • Flow: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • pH, maximum: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • pH, minimum: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • March 5, 2026: Evaluation (S).
  • February 25, 2026: Agency Enforcement Review (State).

Washington holds 238 Publicly owned treatment works coverages of this permit type in EPA’s file; 1 were issued before WA0020575. City of Enumclaw holds 3 permits in Washington.

Other permits held by City of Enumclaw

Coverages issued nearest WA0020575

ENUMCLAW STP among its neighbors

EPA’s permit file holds 21 discharge permits in the Boise Creek-White River subwatershed (HUC 171100140403), WA0020575 among them. Its county holds 1,319, 8 of them major permits; WA0020575 is a major permit.

Other permits in the Boise Creek-White River subwatershed (HUC 171100140403)

Identity

Facility as filedENUMCLAW STP
Permittee as filedCity of Enumclaw
NPDES IDWA0020575
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
IssuedApril 10, 2003
Expiration dateApril 29, 2008
Issuing agencyState
AddressEnumclaw, WA 98022
Receiving water impaired303(D) Listed
SubwatershedBoise Creek-White River (HUC 171100140403)
Program components on filePOTW, Pretreatment
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
Copper, total [as Cu]42828August 31, 201079% over the limit
BOD, 5-day, 20 deg. C8319February 28, 200725% over the limit
Solids, total suspended444March 31, 202253% over the limit
Nitrogen, ammonia total [as N]343June 30, 201171% over the limit
Solids, suspended percent removal1601January 31, 200620% over the limit
BOD, percent removal [total]11180
pH0160
Temperature, water deg. centigrade230
Oxygen, dissolved [DO]200
Alkalinity, total [as CaCO3]200
Hardness, total [as CaCO3]200
Rainfall200
Coliform, fecal general200
Flow200
pH, maximum100
pH, minimum100

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0020575.

Inspections

DateWhat EPA recordedAgency
March 5, 2026EvaluationS

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

DateWhat EPA recordedAgency
February 25, 2026Agency Enforcement ReviewState

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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 WA0020575 for ENUMCLAW STP in Enumclaw, WA, held by City of Enumclaw, which is administratively continued and classed as a Major Discharger. The page lists 15 pollutants under a numeric limit and 5 pollutants with an effluent exceedance.