Clean Water Act discharge permit · NPDES WA0037141

LEWIS COUNTY WATER & SEWER DIST 6, Mossyrock, WA: NPDES WA0037141 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
2Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

LEWIS COUNTY WATER & SEWER DIST 6, held by Lewis County Water & Sewer District #6, holds NPDES permit WA0037141. EPA’s file records it issued September 14, 2011 and expiring October 30, 2016.

LEWIS COUNTY WATER & SEWER DIST 6, Mossyrock, Washington: Individual permit WA0037141, held by Lewis County Water & Sewer District #6; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued September 14, 2011, term to October 30, 2016, by State.

BOD, 5-day, 20 deg. C: 0 limits, 270 violations of any kind, 2 effluent exceedances, latest July 31, 2024, largest 37% over the limit.
Solids, total suspended: 0 limits, 269 violations of any kind, 1 effluent exceedance, latest October 31, 2022, largest 8% over the limit.
pH: 0 limits, 130 violations of any kind, 0 effluent exceedances.
Rainfall: 0 limits, 8 violations of any kind, 0 effluent exceedances.
Coliform, fecal general: 0 limits, 8 violations of any kind, 0 effluent exceedances.
Flow: 0 limits, 8 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 0 limits, 3 violations of any kind, 0 effluent exceedances.
Nitrogen, nitrite total [as N]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Nitrogen, nitrate total [as N]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Phosphate, total [as PO4]: 0 limits, 1 violation of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 0 limits, 1 violation of any kind, 0 effluent exceedances.

Washington holds 238 Publicly owned treatment works coverages of this permit type in EPA’s file; 52 were issued before WA0037141.

Coverages issued nearest WA0037141

July 7, 2011: YELM WATER RECLAMATION FACILITY, Yelm, WA0040762, held by Yelm Water Reclamation Facility
July 8, 2011: WILBUR STP, Wilbur, WA0044920, held by Town of Wilbur
August 9, 2011: TONASKET POTW, Tonasket, WA0052337, held by City of Tonasket
September 1, 2011: DAYTON STP, Dayton, WA0020729, held by City Of Dayton
September 12, 2011: WAPATO, CITY OF - WAPATO WWTP, Wapato, WA0050229, held by WAPATO, CITY OF
September 30, 2011: YAKIMA POTW, Yakima, WA0024023, held by Yakima Regional POTW
October 25, 2011: CHEWELAH WWTP, Chewelah, WA0023604, held by City of Chewelah
November 16, 2011: WASHOUGAL STP, Washougal, WA0037427, held by City of Washougal
November 29, 2011: SPOKANE COUNTY REGIONAL WATER RECLAMATION FACILITY (SCRWRF), Spokane, WA0093317, held by SCRWRF
December 15, 2011: BOSTON HARBOR STP, Olympia, WA0040291, held by Thurston County Public Works

LEWIS COUNTY WATER & SEWER DIST 6 among its neighbors

EPA’s permit file holds 3 discharge permits in the Silver Creek-Cowlitz River subwatershed (HUC 170800050206), WA0037141 among them. Its county holds 160, 4 of them major permits; WA0037141 is a minor permit.

Other permits in the Silver Creek-Cowlitz River subwatershed (HUC 170800050206)

MOSSYROCK BUS GARAGE, Mossyrock: WAR011410, minor permit, permit term to December 31, 2014
MOSSYROCK STP, Mossyrock: WA0021024, minor permit, permit term to December 31, 2021

Identity

Facility as filed	LEWIS COUNTY WATER & SEWER DIST 6
Permittee as filed	Lewis County Water & Sewer District #6
NPDES ID	WA0037141
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	September 14, 2011
Expiration date	October 30, 2016
Issuing agency	State
Address	Mossyrock, WA 98564
Subwatershed	Silver Creek-Cowlitz River (HUC 170800050206)

Effluent limits and exceedances

12Pollutants on file
0Under a numeric limit
12With a violation of any kind
2With 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
BOD, 5-day, 20 deg. C	270	2	July 31, 2024	37% over the limit
Solids, total suspended	269	1	October 31, 2022	8% over the limit
pH	130	0
Rainfall	8	0
Coliform, fecal general	8	0
Flow	8	0
Nitrogen, ammonia total [as N]	3	0
Nitrogen, nitrite total [as N]	1	0
Nitrogen, nitrate total [as N]	1	0
Nitrogen, Kjeldahl, total [as N]	1	0
Phosphate, total [as PO4]	1	0
Phosphorus, total [as P]	1	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0037141.

Inspections

EPA’s inspection file holds no inspection for NPDES WA0037141.

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 WA0037141.

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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES permit WA0037141, held by Lewis County Water & Sewer District #6 for a publicly owned treatment works in Mossyrock, WA, with the permit listed as administratively continued. The facts list 12 pollutants on file, 0 under a numeric limit, and 2 with an effluent exceedance, within the Silver Creek-Cowlitz River watershed (HUC 170800050206).