The SJRA’s general offices are located at Lake Conroe.  SJRA has three separate operating divisions:

The SJRA boundaries include the entire watershed of the San Jacinto River and its tributaries excluding Harris County. This includes all of Montgomery County and parts of Walker, Waller, San Jacinto, Grimes and Liberty Counties. SJRA serves many customers in the Houston area and is authorized to operate in East Harris County through an agreement with the City of Houston, which allows the SJRA to operate east of the San Jacinto River.