EA_02_01 -- Identification Numbering for Water Quality Monitoring Sites

The Division of Operations and Maintenance uses an alphanumeric code to identify water quality sampling sites on the State Water Project. Each code has a two to three letter prefix, which identifies the area or region of the SWP where the site is located. The list of these prefixes and their associated area are listed in this document. A prefix from this list can be entered into the "Station Number" field of the WDL Station & County search window to find all sampling sites in that area.