Clean Water Act discharge permit · NPDES WA0032182

KING COUNTY CARNATION WWTP, Carnation, WA: NPDES WA0032182 discharge permit, effluent exceedances, inspections, penalties

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

KING COUNTY CARNATION WWTP, held by King County Wastewater Treatment Division, holds NPDES permit WA0032182. EPA’s file records it issued September 24, 2021 and expiring October 31, 2026.

KING COUNTY CARNATION WWTP, Carnation, Washington: Individual permit WA0032182, held by King County Wastewater Treatment Division; Publicly owned treatment works; Effective; issued September 24, 2021, term to October 31, 2026, by State.

Solids, total suspended: 0 limits, 763 violations of any kind, 0 effluent exceedances.
BOD, 5-day, 20 deg. C: 0 limits, 667 violations of any kind, 0 effluent exceedances.
Nitrogen, ammonia total [as N]: 0 limits, 665 violations of any kind, 0 effluent exceedances.
Flow: 0 limits, 411 violations of any kind, 0 effluent exceedances.
Chlorine, total residual: 0 limits, 342 violations of any kind, 0 effluent exceedances.
Oxygen, dissolved [DO]: 0 limits, 159 violations of any kind, 0 effluent exceedances.
Ultraviolet light dosage: 0 limits, 159 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl, total [as N]: 0 limits, 122 violations of any kind, 0 effluent exceedances.
Coliform, total general: 0 limits, 108 violations of any kind, 0 effluent exceedances.
Turbidity: 0 limits, 102 violations of any kind, 0 effluent exceedances.
Coliform, fecal general: 0 limits, 90 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 0 limits, 81 violations of any kind, 0 effluent exceedances.
Phosphorus, total [as P]: 0 limits, 81 violations of any kind, 0 effluent exceedances.
BOD, percent removal [total]: 0 limits, 81 violations of any kind, 0 effluent exceedances.
pH, maximum: 0 limits, 81 violations of any kind, 0 effluent exceedances.
pH, minimum: 0 limits, 81 violations of any kind, 0 effluent exceedances.
Solids, suspended percent removal: 0 limits, 81 violations of any kind, 0 effluent exceedances.
Duration: 0 limits, 51 violations of any kind, 0 effluent exceedances.

Washington holds 238 Publicly owned treatment works coverages of this permit type in EPA’s file; 234 were issued before WA0032182. King County Wastewater Treatment Division holds 9 permits in Washington.

Other permits held by King County Wastewater Treatment Division

KING COUNTY SOUTH WWTP, Renton: WA0029581, issued July 1, 2015
KING COUNTY SOUTH TREATMENT PLANT, Renton: WAR002511, issued November 20, 2019
BRIGHTWATER WASTEWATER TREATMENT PLANT, Woodinville: WAR125522, issued November 20, 2019
GEORGETOWN WET WEATHER TREATMENT STATION, Seattle: WAR305356, issued November 18, 2015
NORTH MERCER ISLAND AND ENATAI INTERCEPT, Mercer Island: WAR309411, issued November 18, 2020
WEST DUWAMISH WET WEATHER STORAGE, Seattle: WAR313827, issued November 18, 2020
M STREET TRUNK REHABILITATION, Auburn: WAR315497, issued November 19, 2025
SPO ESI 14 PIPE REHAB, Kirkland: WAR316002, issued November 19, 2025

Coverages issued nearest WA0032182

February 19, 2021: THREE RIVERS REGIONAL WASTEWATER PLANT, Longview, WA0037788, held by Three Rivers Regional Wastewater Authority
February 24, 2021: WARM BEACH CAMPGROUND WWTP, Stanwood, WA0029904, held by Warm Beach Christian Camp
March 26, 2021: CENTRALIA STP, Centralia, WA0020982, held by City of Centralia
May 19, 2021: SNOQUALMIE WWTP AND RECLAIM FACILITY, Snoqualmie, WA0022403, held by Snoqualmie Wastewater & Water Reclamation Facility
July 8, 2021: FREEMAN SCHOOL DISTRICT 358, Rockford, WA0045403, held by Freeman School District 358
March 28, 2022: LANGLEY STP, Langley, WA0020702, held by Langley City of
April 12, 2022: CATHLAMET STP, Cathlamet, WA0022667, held by Town of Cathlamet
June 1, 2024: SNOQUALMIE PASS UTILITY DISTRICT POTW, Snoqualmie Pass, WA0991042, held by Snoqualmie Pass Utility District

KING COUNTY CARNATION WWTP among its neighbors

EPA’s permit file holds 20 discharge permits in the Harris Creek-Snoqualmie River subwatershed (HUC 171100100601), WA0032182 among them. Its county holds 1,319, 8 of them major permits; WA0032182 is a minor permit.

Other permits in the Harris Creek-Snoqualmie River subwatershed (HUC 171100100601)

11207 248TH AVE NE, Redmond: WAR315553, minor permit, permit term to December 31, 2030
201 DEVELOPMENT WEST SHORT PLAT, Redmond: WAR302479, minor permit, permit term to December 31, 2015
ARCADIAN ESTATES, Carnation: WAR301803, minor permit, permit term to December 31, 2015
BATTEN CREEK, Duvall: WAR315346, minor permit, permit term to December 31, 2030
BLUE DOG NORTH AND SOUTH, Redmond: WAR126010, minor permit, permit term to December 31, 2015
CARNATION COTTAGES, Carnation: WAR126855, minor permit, permit term to December 31, 2015
CARNATION FARM RD 5028, Carnation: WAG994619, minor permit, permit term to July 31, 2027
CORBIN EAST WEST, Redmond: WAR302486, minor permit, permit term to December 31, 2015
FAY RIDGE ESTATES, Carnation: WAR314215, minor permit, permit term to December 31, 2025
KING COUNTY ROAD SERVICES-STILLWATER PIT, Carnation: WAG503026, minor permit, permit term to March 31, 2026

Identity

Facility as filed	KING COUNTY CARNATION WWTP
Permittee as filed	King County Wastewater Treatment Division
NPDES ID	WA0032182
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 24, 2021
Expiration date	October 31, 2026
Issuing agency	State
Address	Carnation, WA 98014
Subwatershed	Harris Creek-Snoqualmie River (HUC 171100100601)
Program components on file	POTW, Pretreatment
SIC	4952 – Sewerage Systems

Effluent limits and exceedances

18Pollutants on file
0Under a numeric limit
18With a violation of any kind
0With 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
Solids, total suspended	0	763	0
BOD, 5-day, 20 deg. C	0	667	0
Nitrogen, ammonia total [as N]	0	665	0
Flow	0	411	0
Chlorine, total residual	0	342	0
Oxygen, dissolved [DO]	0	159	0
Ultraviolet light dosage	0	159	0
Nitrogen, Kjeldahl, total [as N]	0	122	0
Coliform, total general	0	108	0
Turbidity	0	102	0
Coliform, fecal general	0	90	0
Nitrogen, total [as N]	0	81	0
Phosphorus, total [as P]	0	81	0
BOD, percent removal [total]	0	81	0
pH, maximum	0	81	0
pH, minimum	0	81	0
Solids, suspended percent removal	0	81	0
Duration	0	51	0

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES WA0032182.

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES WA0032182.

Inspections

EPA’s inspection file holds no inspection for NPDES WA0032182.

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 WA0032182.

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Nearby on the register

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

The KING COUNTY CARNATION WWTP, a POTW individual permit in Carnation, King County, Washington, is one of 11 POTW permits in King County on EPA's NPDES register, and 100.0% of those 11 permits have a violation on file. Of all 11 POTW permits in King County, including this one, 90.9% carry an earlier issue date than this permit, which was issued September 24, 2021. The permit sits among 20 NPDES permits in the Harris Creek-Snoqualmie River subwatershed, and it has no pollutants with a numeric limit or with an effluent exceedance on record.