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Clean Water Act discharge permit · NPDES WA0022446

LA CONNER STP, La Conner, WA: NPDES WA0022446 discharge permit, effluent exceedances, inspections, penalties

LA CONNER STP, held by La Conner Town, holds NPDES permit WA0022446. EPA’s file records it issued February 19, 2019 and expiring February 29, 2024.

LA CONNER STP, La Conner, Washington: Individual permit WA0022446, held by La Conner Town; Publicly owned treatment works; Effective; issued February 19, 2019, term to February 29, 2024, by State.

  • Nitrogen, ammonia total [as N]: 0 limits, 9 violations of any kind, 9 effluent exceedances, latest July 31, 2026, largest 228% over the limit.
  • BOD, 5-day, 20 deg. C: 0 limits, 114 violations of any kind, 6 effluent exceedances, latest December 31, 2022, largest 26% over the limit.
  • Solids, total suspended: 0 limits, 114 violations of any kind, 6 effluent exceedances, latest December 31, 2022, largest 136% over the limit.
  • Coliform, fecal general: 0 limits, 30 violations of any kind, 4 effluent exceedances, latest March 31, 2016, largest 99,999% over the limit.
  • Solids, suspended percent removal: 0 limits, 1 violation of any kind, 1 effluent exceedance, latest September 30, 2009, largest 27% over the limit.
  • pH: 0 limits, 26 violations of any kind, 0 effluent exceedances.
  • Flow: 0 limits, 26 violations of any kind, 0 effluent exceedances.
  • Temperature, water deg. centigrade: 0 limits, 4 violations of any kind, 0 effluent exceedances.

Washington holds 238 Publicly owned treatment works coverages of this permit type in EPA’s file; 213 were issued before WA0022446.

Coverages issued nearest WA0022446

  • December 11, 2018: PORT ORCHARD WWTP, Port Orchard, WA0020346, held by South Kitsap Water Reclamation Facility
  • December 21, 2018: SEDRO WOOLLEY WWTP, Sedro-Woolley, WA0023752, held by City of Sedro-Woolley
  • December 21, 2018: NORTH BEND STP, North Bend, WA0029351, held by City of North Bend
  • December 28, 2018: BUENA POTW, Buena, WA0052132, held by Yakima Co Public Services Buena
  • February 8, 2019: LYNNWOOD STP, Edmonds, WA0024031, held by City of Lynnwood
  • May 23, 2019: PESHASTIN POTW, Peshastin, WA0052175, held by Chelan County PUD No. 1
  • May 28, 2019: ELMA STP, Elma, WA0023132, held by City of Elma
  • May 28, 2019: SEASHORE VILLA STP, Olympia, WA0037273, held by Seashore Villa Mobile Home Park/Emerald Properties
  • June 19, 2019: COUPEVILLE STP, Coupeville, WA0029378, held by Town of Coupeville
  • June 25, 2019: LIGHTHOUSE POINT WATER RECLAMATION FACILITY, Blaine, WA0022641, held by BLAINE CITY OF

LA CONNER STP among its neighbors

EPA’s permit file holds 15 discharge permits in the Fidalgo Island-Frontal Similk Bay subwatershed (HUC 171100190101), WA0022446 among them. Its county holds 212, 2 of them major permits; WA0022446 is a minor permit.

Other permits in the Fidalgo Island-Frontal Similk Bay subwatershed (HUC 171100190101)

Identity

Facility as filedLA CONNER STP
Permittee as filedLa Conner Town
NPDES IDWA0022446
Permit statusEffective
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedFebruary 19, 2019
Expiration dateFebruary 29, 2024
Issuing agencyState
AddressLa Conner, WA 98257
Receiving water impaired303(D) Listed
SubwatershedFidalgo Island-Frontal Similk Bay (HUC 171100190101)
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
Nitrogen, ammonia total [as N]099July 31, 2026228% over the limit
BOD, 5-day, 20 deg. C01146December 31, 202226% over the limit
Solids, total suspended01146December 31, 2022136% over the limit
Coliform, fecal general0304March 31, 201699,999% over the limit
Solids, suspended percent removal011September 30, 200927% over the limit
pH0260
Flow0260
Temperature, water deg. centigrade040

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0022446.

Inspections

EPA’s inspection file holds no inspection for NPDES WA0022446.

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 WA0022446.

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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 WA0022446 for LA CONNER STP in La Conner, WA, held by La Conner Town, with an effective status and an issue date of February 19, 2019 and an expiration date of February 29, 2024. The register lists 8 pollutants on file, 5 of them under a numeric limit and 8 with a violation of any kind, with 5 pollutants showing an effluent exceedance.