Air Quality Resources
Air Districts in the SoCalGas® Service Territory
The California Air Resources Board (CARB) provides a map that will help you identify the various Air Districts in California. This map is available from the CARB map page which contains other helpful maps:
Air Quality Services Brochures
South Coast Air Quality Management District (SCAQMD) Rules
- Understanding SCAQMD Air Quality Rules for Small Boilers and Water Heaters (PDF)
- Understanding SCAQMD Air Quality Rules for Large Boilers -- 2009 (PDF)
- Understanding SCAQMD Air Quality Rules for Engines -- 2009 (PDF)
- Understanding SCAQMD Air Quality for Miscellaneous NOx Sources (PDF)
Guaranteed Permitting Program
- Rule 1146 - Portable Analyzer Protocol, published by the SCAQMD (Word Document)
- Attachment to the above document (PDF)
Certified Source Testers
Source testing is often required in order to comply with many of the rules and regulations imposed by air quality agencies. To make sure the testing is acceptable, the source tester needs to be certified by a qualified agency, such as CARB.
Search a list of certified source testers* courtesy of the California Air Resources Board.
For technical assistance, use the AQ Answerline - Dial 1-562-803-7428 to get personalized assistance with your facility's air quality questions. Find out about current regulations, emission control requirements, emission factors, permitting requirements or other issues you are concerned about.
In addition, we can send you the following information via email:
- Text of federal, state and local air regulations
- Copies of air district forms
- Best Available Control Technology (BACT) guidelines
- Lists of environmental contractors and equipment vendors
- Emission factors
- Details of available emission reduction credits
- Air Quality Assistance Brochures (Permitting, Boiler, and Engine Compliance) developed by SoCalGas
- Referrals for further assistance
The Title V Permit system is the air pollution control permit system required to implement the federal Operating Permit Program as required by Title V of the federal Clean Air Act as amended in 1990. This regulation defines permit application and issuance procedures as well as compliance requirements associated with the program.
Learn more about applicability to Title V in the SCAQMD.
Unit Conversion Tools
The following unit conversion tools will help you meet SCAQMD rules and regulations:
Internal Combustion (IC) Engine Emissions
Manufacturers of IC engines typically quote emissions in units of grams of pollutant/bhp-hour.
However, regulators (such as the South Coast Air Quality Management District) typically specify IC engine emissions in either ppm of pollutant @ 15 percent O2 or ppm of pollutant @ 3 percent O2. You can easily perform the conversion back and forth for various types of pollutants (such as NOx, CO, and ROG) by downloading the IC Engine Emissions Spreadsheet (Microsoft Excel format).
Water Heater Emissions
Manufacturers of water heaters typically quote emissions in units of ppm of pollutant @ 3 percent O2.
However, regulators (such as the South Coast Air Quality Management District) typically specify water heater emissions in nanograms of pollutant/joule of useful work. You can easily perform the conversion back and forth for various types of pollutants (such as NOx, CO, and ROG) by downloading the Water Heater Emissions Spreadsheet (Microsoft Excel format)