Clean Water Act discharge permit · NPDES WA0052337

TONASKET POTW, Tonasket, WA: NPDES WA0052337 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
21Pollutants under a numeric limit
3Pollutants with an effluent exceedance

TONASKET POTW, held by City of Tonasket, holds NPDES permit WA0052337. EPA’s file records it issued August 9, 2011 and expiring September 29, 2016. 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	TONASKET POTW
Permittee as filed	City of Tonasket
NPDES ID	WA0052337
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	August 9, 2011
Expiration date	September 29, 2016
Issuing agency	State
Address	Tonasket, WA 98855
Subwatershed	Whitestone Coulee-Okanogan River (HUC 170200060211)
Program components on file	POTW, Pretreatment
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	RCRA handler WAD000493155

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

21Pollutants on file
21Under a numeric limit
21With a violation of any kind
3With 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	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
BOD, percent removal [total]	2	83	8	July 31, 2026	233% over the limit
BOD, 5-day, 20 deg. C	16	15	7	March 31, 2023	1,700% over the limit
Solids, suspended percent removal	2	5	4	July 31, 2026	67% over the limit
Nitrogen, ammonia total [as N]	10	122	0
Nitrogen, Kjeldahl, total [as N]	11	13	0
Phosphorus, total [as P]	12	10	0
Solids, total dissolved	12	10	0
Solids, total suspended	16	8	0
Temperature, water deg. centigrade	13	8	0
pH	13	8	0
Nitrite + Nitrate total [as N]	2	7	0
Phosphate, total [as PO4]	2	7	0
Conductivity	9	6	0
Nitrogen, nitrate total [as N]	9	6	0
Iron, ferrous - present	9	6	0
Depth to water level ft below landsurface	9	6	0
Hardness, total [as CaCO3]	3	4	0
Oil & grease, non-polar material	3	4	0
Flow	6	3	0
Oxygen, dissolved [DO]	4	2	0
Coliform, fecal general	4	2	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 WA0052337.

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 WA0052337 there.

Nearby on the register

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

This public-records page covers NPDES permit WA0052337 for the Tonasket POTW in Tonasket, WA, held by the City of Tonasket, with a Minor Discharger class and administratively continued status. The page lists 21 pollutants under a numeric limit and 3 pollutants with an effluent exceedance, with the permit's issue date of August 9, 2011 and expiration date of September 29, 2016 as recorded in EPA's permit file as of October 14, 2026.