After entering the key words you want to search, select the district you want to search. For more help, click here. Yolo-Solano AQMD Below, you will also find the contacts for the local districts, the CARB, and the U.S. EPA as well as the rules database. Instead, we converted all the files to HTML format in order to accommodate the needs of our website search engine. This file lists California test methods that have been determined by the U.S. EPA, Region IX, to be technically acceptable for inclusion into the State Implementation Plan.
Some districts have books of test methods and laboratory methods.
For more information, please contact the district.