Clean Water Act discharge permit · NPDES WA0023752

SEDRO WOOLLEY WWTP, Sedro-Woolley, WA: NPDES WA0023752 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
0Pollutants under a numeric limit
1Pollutants with an effluent exceedance

SEDRO WOOLLEY WWTP, held by City of Sedro-Woolley, holds NPDES permit WA0023752. EPA’s file records it issued December 21, 2018 and expiring December 31, 2023. 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 filed	SEDRO WOOLLEY WWTP
Permittee as filed	City of Sedro-Woolley
NPDES ID	WA0023752
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	December 21, 2018
Expiration date	December 31, 2023
Issuing agency	State
Address	Sedro-Woolley, WA 98284
Subwatershed	Skagit River (HUC 171100070203)
Program components on file	POTW, Pretreatment
SIC	4952 – 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

6Pollutants on file
0Under a numeric limit
6With a violation of any kind
1With an effluent exceedance

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 measure	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	99	3	May 31, 2026	45% over the limit
BOD, 5-day, 20 deg. C	96	0
Temperature, water deg. centigrade	30	0
Coliform, fecal general	28	0
pH	24	0
Flow	24	0

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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0023752.

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 WA0023752 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers the NPDES WA0023752 discharge permit held by City of Sedro-Woolley for the SEDRO WOOLLEY WWTP in Sedro-Woolley, WA, which is shown as Effective and within the Skagit River (HUC 171100070203) subwatershed. The permit's file dates, Issued December 21, 2018 and Expiration date December 31, 2023, are listed as EPA's file stood when the record was loaded on October 14, 2026. The page lists 6 pollutants on file, 0 under a numeric limit, 6 with a violation of any kind, and 1 with an effluent exceedance.