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  2. Air Quality Implementation Plans

Washington SIP: EPA Approved Regulations (Table 2 - Washington Department of Ecology)

Latest EPA Action: December 28, 2023

Note: The official SIPs are contained in regulations promulgated in the Federal Register and codified in the U.S. Code of Federal Regulations (CFR). EPA’s web-versions of the approved SIPs are for reference. While we make every effort to maintain the accuracy of the files accessible here, inconsistencies may occur. Please contact us if you find any errors in these files.


View Full Text of EPA Approved Rules

[Applicable in Adams, Asotin, Chelan, Columbia, Douglas, Ferry, Franklin, Garfield, Grant, Kittitas, Klickitat, Lincoln, Okanogan, Pend Oreille, San Juan, Stevens, Walla Walla, and Whitman counties, excluding facilities subject to Energy Facilities Site Evaluation Council (EFSEC) jurisdiction, Indian reservations (excluding non-trust land within the exterior boundaries of the Puyallup Indian Reservation), and any other area where the EPA or an Indian tribe has demonstrated that a tribe has jurisdiction. These regulations also apply statewide for facilities subject to the applicability sections of WAC 173-400-700, WAC 173-405-012, WAC 173-410-012, and WAC 173-415-012.]

40 CFR part 52.2470(c)
Table 2 - Additional Regulations Approved for Washington Department of Ecology Direct Jurisdiction
State citationTitle/subjectState effective dateEPA approval dateExplanations
Washington Administrative Code, Chapter 173-400—General Regulations for Air Pollution Sources
173-400-010Policy and Purpose3/22/916/2/95
60 FR 28726 (PDF)
 
173-400-020Applicability12/29/1210/3/14
79 FR 59653 (PDF)
 
173-400-025Adoption of Federal Rules9/16/182/24/20
85 FR 10301 (PDF)
 
173-400-030Definitions9/16/1812/28/23
88 FR 89582 (PDF)
Except: 173–400–030(96).
173-400-036Relocation of Portable Sources12/29/124/29/15
80 FR 23721 (PDF)
 
173-400-040General Standards for Maximum Emissions9/16/182/24/20
85 FR 10301 (PDF)
Except: 173–400–040(2); 173–400–040(3); 173–400–040(5).
173-400-040(2)General Standards for Maximum Emissions7/1/1610/6/16
81 FR 69385 (PDF)
Except: 173-400-040(2)(c); 173-400-040(2)(d).
173-400-050Emission Standards for Combustion and Incineration Units9/16/182/24/20
85 FR 10301 (PDF)
Except: 173-400-050(2); 173-400-050(4); 173-400-050(5); 173-400-050(6).
173-400-060Emission Standards for General Process Units11/25/182/24/20
85 FR 10301 (PDF)
 
173-400-070Emission Standards for Certain Source Categories9/16/1812/28/23
88 FR 89582 (PDF)
Except 173–400–070(6).
173-400-081Emissions Limits During
Startup and Shutdown.
9/16/1812/28/23
88 FR 89582 (PDF)
 
173–400–082Alternative Emissions Limit
That Exceeds an Emission
Standard in the SIP.
9/16/1812/28/23
88 FR 89582 (PDF)
 
173-400-091Voluntary Limits on Emissions4/1/1110/3/14
79 FR 59653 (PDF)
9/20/93 version continues to be approved under the authority of CAA Section 112(l) with respect to Section 112 hazardous air pollutants. See 60 FR 28726 (June 2, 1995).
173-400-105Records, Monitoring, and Reporting11/25/182/24/20
85 FR 10301 (PDF)
 
173-400-110New Source Review (NSR) for Sources and Portable Sources12/29/129/29/16
81 FR 66823 (PDF)
Except: 173-400-110(1)(c)(ii)(C); 173-400-110(1)(e); 173-400-110(2)(d); The part of WAC 173-400-110(4)(b)(vi) that says, “not for use with materials containing toxic air pollutants, as listed in chapter 173-460 WAC,”; The part of 400-110(4)(e)(iii) that says, “where toxic air pollutants as defined in chapter 173-460 WAC are not emitted”; The part of 400-110(4)(f)(i) that says, “that are not toxic air pollutants listed in chapter 173-460 WAC”; The part of 400-110(4)(h)(xviii) that says, “, to the extent that toxic air pollutant gases as defined in chapter 173-460 WAC are not emitted”; The part of 400-110(4)(h)(xxxiii) that says, “where no toxic air pollutants as listed under chapter 173-460 WAC are emitted”; The part of 400-110(4)(h)(xxxiv) that says, “, or ≤1% (by weight) toxic air pollutants as listed in chapter 173-460 WAC”; The part of 400-110(4)(h)(xxxv) that says, “or ≤1% (by weight) toxic air pollutants”; The part of 400-110(4)(h)(xxxvi) that says, “or ≤1% (by weight) toxic air pollutants as listed in chapter 173-460 WAC”; 400-110(4)(h)(xl), second sentence; The last row of the table in 173-400-110(5)(b) regarding exemption levels for Toxic Air Pollutants.
173-400-111Processing Notice of Construction Applications for Sources, Stationary Sources and Portable Sources7/1/1610/6/16
81 FR 69385 (PDF)
Except: 173-400-111(3)(h); The part of 173-400-111(8)(a)(v) that says, “and 173-460-040,”; 173-400-111(9).
173-400-112Requirements for New Sources in Nonattainment Areas—Review for Compliance with Regulations12/29/129/29/16
81 FR 66823 (PDF)
 
173-400-113New Sources in Attainment or Unclassifiable Areas—Review for Compliance with Regulations12/29/124/29/15
80 FR 23721 (PDF)
Except: 173-400-113(3), second sentence.
173-400-116Increment Protection7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-117Special Protection Requirements for Federal Class I Areas12/29/124/29/15
80 FR 23721 (PDF)
 
173-400-118Designation of Class I, II, and III Areas12/29/1210/3/14
79 FR 59653 (PDF)
 
173-400-131Issuance of Emission Reduction Credits4/1/1111/7/14
79 FR 66291 (PDF)
 
173-400-136Use of Emission Reduction Credits (ERC)12/29/1211/7/14
79 FR 66291 (PDF)
 
173-400-151Retrofit Requirements for Visibility Protection2/10/0510/3/14
79 FR 59653 (PDF)
 
173-400-161Compliance Schedules3/22/916/2/95
60 FR 28726 (PDF)
 
173-400-171Public Notice and Opportunity for Public Comment9/16/1812/28/23
88 FR 89582 (PDF)
Except: The part of 173–400–171(3)(b) that says, ‘‘or any increase in emissions of a toxic air pollutant above the acceptable source impact level for that toxic air pollutant as regulated under chapter 173–460 WAC’’; 173–400–171(12).
173-400-175Public Information2/10/0510/3/14
79 FR 59653 (PDF)
 
173-400-190Requirements for Nonattainment Areas3/22/916/2/95
60 FR 28726 (PDF)
 
173-400-200Creditable Stack Height and Dispersion Techniques2/10/0510/3/14
79 FR 59653 (PDF)
 
173-400-205Adjustment for Atmospheric Conditions3/22/916/2/95
60 FR 28726 (PDF)
 
173-400-210Emission Requirements of Prior Jurisdictions3/22/916/2/95
60 FR 28726 (PDF)
 
173-400-560General Order of Approval12/29/124/29/15
80 FR 23721 (PDF)
Except: The part of 173-400-560(1)(f) that says, “173-460 WAC”.
173-400-700Review of Major Stationary Sources of Air Pollution4/1/114/29/15
80 FR 23721 (PDF)
 
173-400-710Definitions7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-720Prevention of Significant Deterioration (PSD)7/1/1610/6/16
81 FR 69385 (PDF)
Except: 173-400-720(4)(a)(i through iv) and 173-400-720(4)(b)(iii)(C).
173-400-730Prevention of Significant Deterioration
Application Processing Procedures
7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-740PSD Permitting Public Involvement
Requirements
9/16/182/24/20
85 FR 10301 (PDF)
 
173-400-750Revisions to PSD Permits12/29/124/29/15
80 FR 23721 (PDF)
Except: 173-400-750(2) second sentence.
173-400-800Major Stationary Source and Major Modification in a Nonattainment Area4/1/1111/7/14
79 FR 66291 (PDF)
 
173-400-810Major Stationary Source and Major Modification Definitions7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-820Determining if a New Stationary Source or Modification to a Stationary Source is Subject to these Requirements12/29/1211/7/14
79 FR 66291 (PDF)
 
173-400-830Permitting Requirements7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-840Emission Offset Requirements7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-850Actual Emissions Plantwide Applicability
Limitation (PAL)
7/1/1610/6/16
81 FR 69385 (PDF)
 
173-400-860Public Involvement Procedures4/1/1111/7/14
79 FR 66291 (PDF)
 

Full Text of Approved Rules

  • Table 2 - Additional Regulations Approved for Washington Department of Ecology Direct Jurisdiction (pdf) (47.37 MB, Updated as of December 12, 2025)
    Full text of EPA-approved regulations for 40 CFR part 52.2470(c) Table 2. Strikeout text denotes sections not incorporated by reference by EPA.

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Last updated on December 12, 2025
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