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Clean Air Act stationary source · ICIS-AIR WAPSC0005303300138

KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT, Seattle, WA: Clean Air Act compliance record, inspections, violations, penalties

KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT, at 1400 DISCOVERY PARK BLVD (WEST POINT), Seattle in King County, Washington, is an operating major source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “No Violation Identified”. King County is on EPA’s Green Book list of areas that do not meet a national air quality standard. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.

Identity

Facility as filedKING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT
ICIS-AIR IDWAPSC0005303300138
EPA facility registry ID110000563523
Operating statusOperating
Emissions classificationMajor source
Current violation status (ICIS-AIR high-priority violation field)No Violation Identified
Address1400 DISCOVERY PARK BLVD (WEST POINT), Seattle, WA 98199
CountyKing County
In a nonattainment countyYes (EPA Green Book)
Industry (NAICS)Utilities (NAICS 2213)
EPA region10
Local air agencyPuget Sound Clean Air Agency

Cited to the EPA ICIS-AIR facility file (ECHO download).

Programs and pollutants

Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs KING COUNTY WASTEWATER TREATMENT DIVISION WEST POINT TREATMENT PLANT is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.

Compliance evaluations

The newest 50 of 98.

DateWhat EPA recordedAgencyPrograms
May 12, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
April 24, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 23, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 19, 2026FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 19, 2026PCE On-Site Record/Report ReviewLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 2, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
February 23, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
January 29, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
January 16, 2026PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
December 1, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
October 30, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
October 7, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
October 2, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
August 19, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
July 23, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
July 10, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
April 14, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
April 14, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 3, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
February 27, 2025PCE On-Site Record/Report ReviewLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
February 27, 2025FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
January 7, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
January 2, 2025PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
December 23, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
October 11, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
September 27, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
August 13, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
August 2, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
June 11, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
May 15, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
May 15, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
May 6, 2024FCE On-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
May 6, 2024PCE On-Site Record/Report ReviewLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 14, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 14, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
March 11, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
February 9, 2024PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
December 8, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
November 17, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
October 6, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
July 10, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
June 27, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
May 23, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
May 18, 2023PCE Off-SiteLocalMACT Standards (40 CFR Part 63); New Source Performance Standards; Title V Permits
November 21, 2022PCE Off-SiteLocalNew Source Performance Standards; Title V Permits
November 4, 2022FCE On-SiteLocalNew Source Performance Standards; Title V Permits
November 4, 2022PCE On-Site Record/Report ReviewLocalNew Source Performance Standards; Title V Permits
October 21, 2022PCE Off-SiteLocalNew Source Performance Standards; Title V Permits
September 1, 2022PCE Off-SiteLocalNew Source Performance Standards; Title V Permits
November 30, 2021FCE On-SiteLocalNew Source Performance Standards; Title V Permits

Violations

A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.

EPA’s violation history file holds no violation for ICIS-AIR WAPSC0005303300138 since January 1, 2017.

Enforcement and penalties

4 formal enforcement actions since January 1, 2017, 2 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.

DateWhat EPA recordedAgencyPenalty, as filed
August 15, 2024Administrative OrderLocal$0
August 15, 2024Administrative OrderLocal$0
October 19, 2023Administrative OrderLocal$2,000
July 6, 2017Administrative OrderLocal$3,000

Informal enforcement

The newest 50 of 53.

DateWhat EPA recordedAgency
April 15, 2026Notice of ViolationLocal
April 15, 2026Notice of ViolationLocal
April 15, 2026Notice of ViolationLocal
March 30, 2026Notice of ViolationLocal
March 4, 2026Warning LetterLocal
December 12, 2025Notice of ViolationLocal
November 10, 2025Notice of ViolationLocal
November 10, 2025Notice of ViolationLocal
November 10, 2025Notice of ViolationLocal
November 10, 2025Warning LetterLocal
September 3, 2025Notice of ViolationLocal
March 27, 2025Warning LetterLocal
March 14, 2025Notice of ViolationLocal
March 14, 2025Notice of ViolationLocal
March 14, 2025Notice of ViolationLocal
March 14, 2025Notice of ViolationLocal
February 28, 2025Notice of ViolationLocal
February 28, 2025Notice of ViolationLocal
November 27, 2024Notice of ViolationLocal
September 23, 2024Warning LetterLocal
May 20, 2024Warning LetterLocal
December 26, 2023Notice of ViolationLocal
November 29, 2022Notice of ViolationLocal
November 29, 2022Notice of ViolationLocal
November 29, 2022Notice of ViolationLocal
January 27, 2022Notice of ViolationLocal
August 27, 2021Warning LetterLocal
June 17, 2021Notice of ViolationState
June 10, 2021Notice of ViolationState
August 16, 2019Notice of ViolationLocal
August 16, 2019Warning LetterLocal
September 17, 2018Notice of ViolationLocal
February 7, 2018Notice of ViolationLocal
February 7, 2018Notice of ViolationLocal
February 6, 2018Notice of ViolationLocal
September 29, 2017Notice of ViolationLocal
September 29, 2017Notice of ViolationLocal
September 29, 2017Notice of ViolationLocal
September 28, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal
September 14, 2017Notice of ViolationLocal

Stack tests

DateWhat EPA recordedAgency
January 22, 2025PassLocal
January 20, 2025PassLocal
January 20, 2025PassLocal
October 23, 2024PassLocal
October 21, 2024PassLocal
October 21, 2024PassLocal
October 21, 2024PassLocal
October 21, 2024PassLocal
October 21, 2024PassLocal
October 21, 2024PassLocal
October 21, 2024PassLocal
July 17, 2024PassLocal
July 17, 2024PassLocal
July 17, 2024PassLocal
July 17, 2024PassLocal
January 21, 2024PassLocal
July 24, 2019PassLocal
July 24, 2019PassLocal
July 24, 2019PassLocal
July 24, 2019PassLocal
July 24, 2019PassLocal

Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110000563523 there.

Nearby on the register

Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.