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RIVERSIDE PUBLIC UTILITIES Board Memorandum BOARD OF PUBLIC UTILITIES DATE: DECEMBER 11, 2017 GENERAL MANAGER’S REPORT ITEM NO:11 Riverside Public Utilities Drought and Conservation Efforts / Groundwater Level Update As of October2017 Conservation Efforts For the month of October2017, Riversideresident’s water conservationwent down to -2%. Weather conditions comparisons between the two October months (2013 vs 2017) shows that October 2017 was about 8 degrees warmerwith no rainfall compared to October 2013 that registered 0.6 inchesof rainfall. Cumulatively it is at 14%from June 2016 to October2017(Figure 1). This translates to 14,645 Acre-feet (4,772million gallons)of potable water being conserved. On a Regional scale, Riverside resident’s water consumption; measured in gallons per capita per day (Residential-GPCD) is comparable to the aggregate consumption within the surrounding ten water agencies (Figure 2). RPU’s Residential-GPCD moved a little higher than the regional Residential-GPCDin the months of Maythrough September 2017, but it is at the same level regionally since January 2017with an average of 110. Basin Groundwater Levels Groundwater levels in the Bunker Hill, Riverside North, and Rialto-Colton basins are continuing to show a long-term, declining trend while groundwater levels in the Riverside South Basin remain stable (Figure 3). Groundwater levels in Bunker Hill are beginning to rebound from summer pumping while the Rialto-Colton and Riverside North basins continue to decline. The Bunker Hill Basin is about 10 feet lower compared to last year while the Riverside North Basin is about 1.8 feet lower compared to last year. The Rialto-Colton basin is 10.7 feet lower compared to last year however this is primarily due to an active production well influencing the water level measurement. Page 198