Air Quality Planning and Science Division

Speciation Profiles Used in CARB Modeling

Speciation profiles provide estimates of the chemical composition of emissions, and are used in the emission inventory and air quality models. CARB maintains and updates estimates of the chemical composition and size fractions of particulate matter (PM) and the chemical composition and reactive fractions of total organic gases (TOG), for a variety of emission source categories.

Speciation Profiles

CARB's current PM and Organic Gas Speciation Profiles are available for download from this page as Excel spreadsheet files (PMPROF and ORGPROF). Each speciation profile provides weight fraction data of each chemical species making up the total particulate matter or total organic gases, and is designated by an identification code number. The chemical species are identified by a 5-digit SAROAD code and the chemical name. For PM, there are also PM size fraction tables, which provide the particulate mass within each size fraction (PM total, PM 10, or PM 2.5) for individual source categories. The PMSIZE spreadsheet file contains a summary of the PM size fractions for each PM profile. To compute the amount of a specific chemical constituent in the PM size fraction of interest, each PM chemical weight fraction must be multiplied by the appropriate PM size fraction.

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CHEM- Chemical species data for source categories

FRAC - Fraction data for source categories

ORGPROF - Organic chemical profiles for source categories

PMPROF - Particulate matter chemical profiles for source categories

PMSIZE - Particle size fraction data for source categories

ORGPROF_REF - Reference number for organic gas profiles (link to the references)

PMPROF_REF - Reference number for PM profiles (link to the references)

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Consolidated List for Speciation Profiles

Number	Reference
1	1997 ARB Aerosol Coatings Survey
2	1997 ARB Consumer Products Survey
3	1998 ARB Architectural Coatings Survey
4	A. Censullo, California Polytechic State University, San Luis Obispo,"Development of Species Profiles for Selected Organic Emission Sources; Vol II: Engine Exhaust Emissions", ARB Contract A832-059, April 30, 1991.
5	Air Toxics "Hot Spots" (AB2588) data
6	ARB In-Use Vehicle Surveillance Program Testing 1994,1996,1999,2000
7	ARB Kern County study (early 1980s)
8	ARB MTBE/Ethanol study 1997
9	B.M. Jenkins, et al, UC Davis, "Atmospheric Pollutant Emission Factors from Open Burning of Agricultural and Forest Biomass by Wind Tunnel Simulations, Vol. 1-3", ARB contract A932-126, April 1996.
10	Spicer, C.W., et al. Composition and Photochemical Reactivity of Turbine Engine Exhaust, Battelle Columbus Laboratories. ESL-TR-84-28, Sept. 1984
11	Censullo, CalPoly San Luis Obispo, testing; ARB Contract No. 93-319. June 1996.
12	Cooper, J. A., et. al., NEA, Inc. PM10 Source Composition Library for the South Coast Air Basin, Volume I and II. Prepared for the South Coast Air Quality Management District, El Monte, CA. July 15, 1987.
13	CRPAQS, data from Karen Magliano, ARB, PM 10 samples were collected in 1997 from San Joaquin Valley
14	E.H. Pechan degreasing study, ARB Contract No. 93-341, December 1995.
15	F.C. Spurlock, DPR, 2000 Statewide ag VOC pesticide inventory, 9/19/02
16	Shareef, G.S., et al. Update of Volatile Organic Compound (VOC) Species Data Manual (Second Edition), Interim Document, Radian Corporation. EPA Contract 68-02-3889, April 1987.
17	H.J. Taback, et al., "Fine Particle Emissions From Stationary and Miscellaneous Sources in the South Coast Air Basin", KVB 5806-783; KVB, Inc., Tustin, California, February 1979.
18	Bucon, H.W.; Macko, J. Volatile Organic Compound (VOC) Species Data Manual. KVB Inc., December 1978.
19	Hildemann, L.M.; Markowski, G.R.; Cass, G.R.; "Chemical Composition of Emissions from Urban Sources of Fine Organic Aerosol"; Environ. Sci. Technol. Vol. 25, No. 4, p. 744, 1991
20	OMNI: J.E. Houck, et al., "Determination of Particle Size Distribution Composition of Particulate Matter from Selected Sources in California", ARB Contract A6-175-32, OMNI Environmental Services, Inc., Beaverton OR, Desert Research Instit., Reno NV; June 1989.
21	R. Pelt, et al., "User's Manual, Landfill Gas Emissions Model, Version 2.0", U.S. EPA, EPA/600/R-98/054, http://www.epa.gov/ORD/WebPubs/landfill, May 1998.
22	Taback, H.J., et al. Control of Hydrocarbon Emissions from Stationary Sources in the California South Coast Air Basin, Volume II. KVB Inc., Tustin, CA. June 1978.
23	U.S. EPA, SPECIATE database, http://www.epa.gov/ttnchie1/software/speciate; Profiles (304,306,307,316,321,1097-1099,2402,2466,2541, 2542,8235,9003-9007,9009-9014,9016-9017,9021,9026,9028-9030, 9032,9036,9040,9043,9047)
24	U.S. EPA data, EPA-453/R-94-066-A. Report to Congress. March 1995.
25	W.R. Oliver, S.H. Peoples, "Improvement of the Emission Inventory for Reactive Organic Gases and Oxides of Nitrogen in the South Coast Air Basin", Vol. I and II, ARB Contract A2-076-32; SAI and Radian Corp.; May 1985.
26	Smith, W.S.; Gruber, C.W. Atmospheric Emissions From Coal Combustion. April 1966.
27	Uncontrolled Municipal Incinerators (1971), MRI.
28	Dynamometer Tests By General Motors And J.P. Subramani of University of Cincinnati (Old Tire/Brake Wear Profiles)
29	KVB Assumption (PM Profile # 900, Unspecified)
30	R. Harley, UC Berkeley, theoretical analysis of headspace vapor (Diurnal/Resting Evaporative Gasoline Emissions)
31	South Coast AQMD Testing (1978), External combustion boilers- distillate or residual
32	Southern Calif. Gas Co. (Composite Natural Gas)
33	ARB Staff (Organic Profile 506, Halogenated cleaning solvents- mixed)
34	ARB Staff (Organic Profile 515, Composite industrial degreasers)
35	ARB Staff (Organic Profile 516, Composite dry-cleaning solvents)
36	ARB Staff (Organic Profile 517, Printing evaporation loss- general)
37	ARB Staff (Organic Profile 519, Aerosol sprays- synthetic)
38	ARB Staff (Organic Profile 549, Red oak combustion - wood stove (w/o catalyst))
39	ARB Staff (Organic Profile 562, Geysers power plant main steam)
40	ARB Staff (Organic Profile 563, Jet fuel evaporation (JP-4))
41	ARB Staff (Organic Profile 802, Composite mineral spirit (naphthas or lactol spirits))
42	No Reference Listed (PM Profile 402, Two Compound Split - HEXAVALENT, TRIVALENT CHROMIUM)
43	No Reference Listed (Organic Profile 600, Default: weighted composite across all categories)
44	No Reference Needed (Single Compound)
58	Light-duty fleet composite organic gas emission profiles derived from ARB in-use surveillance data (Paul Allen - Air Resources Board).
60	Identification and Quantitation of Volatile Organic Compounds Emitted from Dairy Silages and Other Feedstuffs
61	Organic Gas Speciation Profiles for E6 Summer Liquid Gasoline Fuel (OG681) & E6 Winter Liquid Gasoline Fuel (OG682) By Wenli Yang, PhD Planning and Technical Support Division (PTSD) April, 2013
62	Organic Gas Speciation Profiles for Headspace Vapor of E6 Summer Gasoline Fuel (OG683) & Headspace Vapor of E6 Winter Gasoline Fuel (OG684) Wenli Yang, PhD Planning and Technical Support Division (PTSD) March 6, 2013
63	Organic Gas Speciation Profile for E10 Summer Liquid Gasoline (OG690) Wenli Yang Planning and Technical Support Division (PTSD) July 11, 2012
64	Organic Gas Speciation Profile for Headspace Vapor of E10 Summer Gasoline Fuel (OG691) Wenli Yang Planning and Technical Support Division (PTSD) June 27, 2012
65	OG Speciation Profile for E10 Summer Gasoline Fuel—2013 update (OG692) Wenli Yang, PhD, PE Air Quality Planning and Science Division October 28, 2013
66	Organic Gas Speciation Profiles for Catalyzed Gasoline-Powered Vehicle Start Exhaust—E6 Fuel (OG2301 & OG2302) Wenli Yang, PhD, PE Air Quality Planning and Science Division October 30, 2013
67	Organic Gas Speciation Profiles for Catalyzed Gasoline-Powered Vehicle Stabilized Running Exhaust—E6 Fuel (OG2303 & OG2304) Wenli Yang, PhD, PE Air Quality Planning and Science Division December 12, 2013
68	Organic Gas Speciation Profiles for Gasoline-Powered Vehicle Hot Soak Evaporations—E6 Fuel (OG2305 & OG2306) Wenli Yang, PhD, PE Air Quality Planning and Science Division August 18, 2014
69	Organic Gas Speciation Profiles for Gasoline-Powered Vehicle Diurnal Evaporations—E6 Fuel (OG2307 & OG2308) Wenli Yang, PhD, PE Air Quality Planning and Science Division August 21, 2014
70	Organic Gas Speciation Profiles for Consumer Products (2010 Update) Wenli Yang, PhD, PE Air Quality Planning and Science Division April 22, 2014
71	2004 Architectural Coatings – Solvent Based – 2005 Survey (OG Profile No. 3901) and 2004 Architectural Coatings – Water Based – 2005 Survey (OG Profile No. 3902) By Dr. Wenli Yang Planning and Technical Support Division (PTSD) October 18, 2010
72	OG Speciation Profile for Aircraft—Jet Fuel (OG5861) By Dr. Wenli Yang Planning and Technical Support Division February 21, 2012
73	PM Speciation Profiles for Residential Fuel Combustion—Natural Gas (PM122) By Dr. Wenli Yang Planning and Technical Support Division (PTSD) January 10, 2012
74	PM Speciation Profiles (501, 502, 503, and 504) for Charbroiling and Cooking By Dr. Wenli Yang Planning and Technical Support Division (PTSD) May 16, 2011
75	Ocean-Going Vessel (OGV) PM Speciation Profile Preparation
76	PM Speciation Profiles for Commercial Aircraft—Jet Fuel (PM1411-1414) By Dr. Wenli Yang Planning and Technical Support Division May 25, 2012
77	2012 2nd Quarter Report “Characterization of Cotton Gin Particulate Matter Emissions”
78	PM Size and Chemical Speciation Profile for Concrete Batching—PM3431 Wenli Yang, PhD, PE Air Quality Planning and Science Division October 22, 2013
79	OGV PM Speciation Profile Development and Assignment Wenli Yang(draft 12/8/2011) Updated 3/06/2102
80	Heavy Duty Diesel Vehicle Exhaust PM Speciation Profiles Wenli Yang, PhD Planning and Technical Support Division
81	Off-Road Diesel Vehicle PM Profiles Wenli Yang PTSD Nov. 2, 2011
82	PM Speciation Profiles for Gasoline-Powered Vehicle Exhaust Wenli Yang, PhD Planning and Technical Support Division(4th version) 11/10/2011
83	Organic Gas Speciation Profiles for Buses Running on Compressed Natural Gas (CNG), Wenli Yang, PhD; Paul Allen, 3/18/2008 (Revised on 9/5/2014)
84	Organic Gas Speciation Profiles for Running Exhaust of CNG (Compressed Natural Gas) Transit Buses Equipped with TWC (Three-Way Catalysts), Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (10/16/2014)
85	PM Size and Chemical Speciation Profiles for Surface Coating Operations—PM2201, PM2202 and more, Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (2/15/2015)
86	Organic Gas Speciation Profile for E10 Winter-Grade Gasoline Fuel (OG694), Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (2/15/2015)
87	Organic Gas Speciation Profile for Headspace Vapor of E10 Winter Gasoline Fuel (OG695), Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (3/16/2015)
88	Organic Gas Speciation Profile for Gasoline-Powered Vehicles Hot Soak Evaporations—E10 Summer Fuel (OG2315), Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (1/28/2015)
89	Organic Gas Speciation Profile for Gasoline-Powered Vehicles Diurnal Evaporations—E10 Summer Fuel (OG2317), Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (1/27/2015)
90	PM Size Profile for Cotton Ginning Operations (PM3282), Wenli Yang, PhD, PE, Air Quality Planning and Science Division, (10/26/2015)
91	Hsu, Y. Methodology for Speciation of Organic Gas Hot Soak Emissions California Light-Duty Vehicles. ARB. July, 2003.
92	2001 Consumer Products Survey. ARB. 2008.
93	Yang, W. PM Speciation Profiles for Gas- and Oil-Fired Stationary Combustion (PM1101-PM1105). ARB. October, 2015.
94	Yang, W. Organic Gas Speciation Profile for Plastics Production-Polystyrene (OG750)
95	Yang, W. Organic Gas Speciation Profile for Biomass Burning (OG1471-1478)
96	Yang, W. Organic Gas Speciation Profile for Off-Highway Recreational Vehicles Running Exhaust (OG2309 and OG2310)
97	Yang, W. Organic Gas Speciation Profile for Off-Highway Recreational Vehicles Evaporative Emissions (OG2311)
98	Yang, W. PM Speciation Profiles for Tire Burning-PM1301 (Controlled Tire Combustion) and PM1302 (Uncontrolled Open Tire Fire)
99	Yang, W. PM Speciation Profiles for Asphalt Concrete Manufacturing Plant (PM3421-3424). ARB. 2016
100	Yang, W. PM Speciation Profiles for Heavy Duty Diesel Vehicle Exhaust for Years 2010 to 2050 (PM7XXX). ARB. 2016
101	Yang, W. Organic Gas Speciation Profiles for Consumer Products (2020 Update). CARB. 2020
102	Yang, W. PM Speciation Profiles for Piston-Engine Aircraft (Running Aviation Gasoline) - PM 1415, CARB. 2019
103	Yang, W. PM Speciation Profiles for Running Exhaust from Compressed Natural Gas Transit Buses Equipped with Three-Way Catalyst - PM4004 & PM4005, CARB. 2021
104	Yang, W. PM Speciation Profiles for Ocean-Going Vessel Auxiliary Boilers —PM1106~1109
105	Yang, W. PM Speciation Profiles for Off-road Diesel Military Generators – PM1110~1112
106	Yang, W. OG Speciation Profiles for Architectural Coatings (2014 Survey) – OG3903 & OG3904, CARB. 2022
107	Yang, W. PM Speciation Profiles for On-Road Gasoline-Powered Vehicle Exhaust: Start and Running – PM4006 and PM4007
108	Yang, W. PM Speciation Profiles for Light-Duty Vehicle Brake Wear – PM4008, PM4009 and PM4010
109	Yang, W. OG Speciation Profile for Residential Wood Combustion (Fireplace) – OG5491
110	Yang, W. PM Speciation Profile for Residential Wood Combustion (Fireplace and Wood Stove) – PM426

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Documents

Reference Number 1 - 1997 ARB Aerosol Coatings Survey

Reference Number 2 - 1997 ARB Consumer Products Survey

Reference Number 3 - 1998 ARB Architectural Coatings Survey

Reference Number 4 - Development of Species Profiles for Selected Organic Emission Sources Vol II Engine Exhaust Emissions

Reference Number 6 - ARB In Use Surveillance Program Testing 1994, 1996, 1999,2000

Reference Number 10 - Spicer Composition and Photochemical Reactivity of Turbine Engine Exhaust

Reference Number 11 - ARB Contract Number 93-919

Reference Number 15 - chmrpt00

voc_epa450_378-119_1978.df

final_1988-apr_voc_speciesprofiles_epa-450_2-88-003a

landfill.pdf

kvb_arb5-1323_1978.pdf

voc_epa-453_r-94-066-a.pdf

smith_coalcombustion_1966.pdf

atta1.pdf

Reference Number 61 - Organic Gas Speciation Profiles for E6 Summer Liquid Gasoline Fuel (OG681) & E6 Winter Liquid Gasoline Fuel (OG682)

Reference Number 62 - Organic Gas Speciation Profiles for Headspace Vapor of E6 Summer Gasoline Fuel (OG683) & Headspace Vapor of E6 Winter Gasoline Fuel (OG684)

Reference Number 63 - Organic Gas Speciation Profile for E10 Summer Liquid Gasoline (OG690) Wenli Yang Planning and Technical Support Division (PTSD) July 11, 2012

Reference Number 64 - Organic Gas Speciation Profile for Headspace Vapor of E10 Summer Gasoline Fuel (OG691) Wenli Yang Planning and Technical Support Division (PTSD) June 27, 2012

Reference Number 65 - OG Speciation Profile for E10 Summer Gasoline Fuel—2013 update (OG692)

Reference Number 66 - Organic Gas Speciation Profiles for Catalyzed Gasoline-Powered Vehicle Start Exhaust—E6 Fuel (OG2301 & OG2302)

Reference Number 67 - Organic Gas Speciation Profiles for Catalyzed Gasoline-Powered Vehicle Stabilized Running Exhaust—E6 Fuel (OG2303 & OG2304)

Reference Number 68 - Organic Gas Speciation Profiles for Gasoline-Powered Vehicle Hot Soak Evaporations—E6 Fuel (OG2305 & OG2306)

Reference Number 69 - Organic Gas Speciation Profiles for Gasoline-Powered Vehicle Diurnal Evaporations—E6 Fuel (OG2307 & OG2308)

Reference Number 70 - Organic Gas Speciation Profiles for Consumer Products (2010 Update)

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Facility Search Tool - Description

The Facility Search Tool is can be used to query stationary point criteria pollutant and air toxics emissions in a given inventory reporting year, as well as information on facility risk. The tool contains historical and current criteria and toxics emissions data from 1987 and 1996, respectively.

Stationary point sources are sources that can be identified by locations and are often permitted by local Air Quality Management Districts and Air Pollution Control Districts. Examples of stationary sources include facility point sources, such as power plants and oil refineries.

The tool pulls data from CEIDARS(California Emissions Inventory Data Analysis and Reporting System), which is a database management system developed to track statewide criteria pollutant and air toxic emissions.

The emissions inventory development is an ongoing process, and, as new information becomes available, methodologies and models are improved. The Facility Search Engine reflects a snapshot of the CEIDARS inventory at specific date and time.

Find criteria and toxics pollutant emissions data for facilities in California.

After selecting on "Facility Search" below, choose a year that you are interested in.
Limit your search results by the name of the facility (try typing only 1 word) or air district.
Determine if you are more interested in criteria pollutant data, toxic emissions and risk data, or a particular pollutant using the radial button at the bottom of the screen. If you choose "Show Facilities that emit..", use the pull-down to pick a pollutant.
Submit your request (results will appear more quickly if you narrow your search).
Sort the data if necessary using the blue arrows.
Download the facility list.
Select the name of the facility to get information about emissions and risk data.

Begin Your Facility Search Here.

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2021 Facility Reporting Summary

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Comments Received - Hot Spots Emission Inventory Criteria and Guidelines Regulation

EICG Amendments: Workshop and Rulemaking Comments Received

Comments received as part of CARB's 2020 rulemaking process to develop amendments to the AB 2588 Air Toxics "Hot Spots" Emission Inventory Criteria and Guidelines Regulation (Guidelines, or EICG Regulation).

Webinar Comments & Questions Submitted

Informal Comments* Submitted Following the Webinar held April 30, 2020 and the Posting of Draft Materials on July, 29 2020

#	Company	Received From	Comment Period	Date	Attachments
1	American Chemistry Council On behalf of the following organizations: American Coatings Association American Pistachio Growers California Business Properties Association California Citrus Mutual California Cotton Ginners and Growers Association California Independent Petroleum Association Chemical Industry Council of California Far West Equipment Dealers Association Metal Finishing Association of Northern California Metal Finishing Association of Southern California Western Agricultural Processors Association Western Independent Refiners Association Western States Petroleum Association	Steve Risotto	Workshop	May 21, 2020	Attachment
2	American Coatings Association	David Darling	Workshop	May 21, 2020	Attachment
3	Agricultural Council of California California Association of Winegrape Growers California Farm Bureau Federation California League of Food Producers Wine Institute	Emily Rooney Michael Miiller Robert Spiegel John Larrea Noelle G. Cremers	Workshop	May 21, 2020	Attachment
4	Arid Technologies, Inc.	Ted Tiberi	Workshop	May 4, 2020	Attachment
5	California Asphalt Pavement Association California Construction and Industrial Materials Association	Russell W. Snyder Adam Harper	Workshop	May 21, 2020	Attachment
6	California Association of Sanitation Agencies	Sarah A. Deslauriers	Workshop	May 21, 2020	Attachment
7	California Council for Environmental and Economic Balance	Janet Whittick	Workshop	May 21, 2020	Attachment
8	California Small Business Alliance	Bill La Marr	Workshop	May 22, 2020	Attachment
9	Industrial Environmental Association	Jack Monger	Workshop	May 21, 2020	Attachment
10	Printing United Alliance	Marcia Y. Kinter	Workshop	May 21, 2020	Attachment
11	Agricultural Council of California American Coatings Association American Forest & Paper Association California Association of Winegrape Growers California Construction and Industrial Materials Association California Food Producers California Independent Petroleum Association California Manufacturers & Technology Association Chemical Industry Council of California Industrial Environmental Association Metal Finishing Association of Northern California Metal Finishing Association of Southern California Western Independent Refiners Association Western States Petroleum Association Western Wood Preservers Institute	Tim Shestek	Draft Materials	August 12, 2020	Attachment
12	California Association of Sanitation Agencies	Sarah A. Deslauriers	Draft Materials	August 12, 2020	Attachment
13	California Council for Environmental and Economic Balance	Bill Quinn	Draft Materials	August 12, 2020	Attachment
14	California Cement Manufacturers Environmental Coalition	Frank T. Sheets	Draft Materials	August 11, 2020	Attachment
15	California Waste Haulers Council	John Kelly Astor Paul Ryan Kathryn Lynch	Draft Materials	August 12, 2020	Attachment
16	Monterey Bay Air Resources District	Amy Clymo	Draft Materials	August 12, 2020	Attachment
17	W. L. Gore and Associates	Jeff Sickenger	Draft Materials	August 19, 2020	Attachment 1 Attachment 2
18	Western States Petroleum Association	Kevin Buchan	Draft Materials	August 12, 2020	Attachment
19	African-American Farmers of California American Chemistry Council American Coatings Association California Asphalt Pavement Association California Business Properties Association California Chamber of Commerce California Construction Materials and Industrial Materials Association California Cotton Ginners and Growers Association California Independent Petroleum Association California League of Food Producers California Manufacturers & Technology Association California Metals Coalition California Retailers Association California Small Business Alliance Central Valley Business Federation California Waste Hauler’s Council Chemical Industry Council of California Construction Industry Air Quality Coalition East Bay Leadership Council Future Ports Garden Grove Chamber of Commerce Harbor Association of Industry and Commerce The Industrial Association of Contra Costa County Industrial Environmental Association Inland Empire Disposal Association Inland Empire Economic Partnership International Warehouse Logistics Association Kern Citizens for Energy Kern County Taxpayers Association Long Beach Area Chamber of Commerce Los Angeles Area Chamber of Commerce Los Angeles County Business Federation Metal Finishing Association of Northern California Metal Finishing Association of Southern California NAIOP SoCal Commercial Real Estate Development Association Nisei Farmers League NFIB – California Orange County Business Council Sacramento Metropolitan Chamber of Commerce San Gabriel Valley Economic Partnership South Bay Association of Chambers of Commerce Torrance Area Chamber of Commerce Valley Industry and Commerce Association West Contra Costa County Council of Industries Western Agricultural Processors Association Western Independent Refiners Association Western States Petroleum Association Western Wood Preservers Institute Wilmington Chamber of Commerce	Lance Hastings Tim Shestek	Draft Materials	September 16, 2020	Attachment
20	California Small Business Alliance	Bill La Marr	Draft Materials	September 16, 2020	Attachment
21	California Cement Manufacturers Environmental Coalition	Frank T. Sheets	Draft Materials	September 29, 2020	Attachment

* Informal comments are not included or submitted as part of the formal rulemaking docket for the regulation, but are considered and evaluated in developing the proposed amendments to the regulation.

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Information

Indian Wells Valley Second 10-Year PM10 Maintenance Plan

Air District Rules

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There are 35 local Air Pollution Control Districts (APCD) and Air Quality Management Districts (AQMD) (Districts) that regulate stationary sources in California. These stationary sources are located in the jurisdiction of each air district. This web page provides information for you to look up district rules, connect with your air district, and see what rules have been submitted into California’s State Implementation Plan (SIP).

Air District Rules

CARB posts air district rules as a service to the public and the air districts. Many districts also post their rules on their own website.

CARB strives to keep a current list of district rules. However, we cannot ensure this. CARB updates the database as best as possible. The districts help us with this. If you are in doubt, review the actual district rule version. Note that the rule shown may not be in the applicable State Implementation Plan (SIP). If you need information regarding the applicable SIP, contact the district directly. You may also contact Doris Lo of the United States Environmental Protection Agency at (415) 972-3959.

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