Reports Reports are generally available for inspection at Watermaster offices during business hours. Some are available for purchase. Call us for further information. 37th Annual Report of the Main San Gabriel Basin Watermaster for 2008-2009. This is our latest annual report. A separate executive summary which excludes the technical appendices has also been published. Five-Year Water Quality and Supply Plan for 2008-09 to 2012-13. Data Technical data that is viewable or downloadable: PDF maps, including groundwater level contours for 2002-2006. GIS data, including groundwater level contours for 1996-2001. Canyon Basin Management MOU levels