1. City of Santa Cruz Water System Overview

2. Water Service Area Characteristics   Area served: entire City, parts of Santa Cruz County, City of Capitola   Population served: 90,000   Number of housing units: 34,000   Employment base: 45,000 jobs

3. San Lorenzo River Tait Street Tait Street Wells Wells LiddellSpring Tait Street Diversion North Coast Diversions Felton Diversion 1 Newell Creek Loch Lomond Reservoir Laguna/Riggiardo Majors BeltzWells Sources of Supply

4. The Good…  The water quality in the City’s sources is excellent  The number of sources are very diverse, allowing flexibility in operations  In most years, there is good rainfall and adequate supply to meet full system demands

5. The Bad… The City of Santa Cruz is vulnerable to water shortages in times of drought

6. ….and the ugly  Under present conditions, the worst case water shortage (assuming repeat of 1976- 77 hydrologic conditions) is on the order of 40%  By 2020, if nothing is done to balance supply and demand, the supply deficit is expected to be over 50%

7. Comparison of Water Supply and Demand (million gallons per year)

8. The why…

9. To deal with it…  Implement additional conservation programs to stretch existing supplies  Prepare to ration use in drought times, but at a reasonable level that will be decided at a policy (Council) level  Augment supply modestly to make up the difference after deducting conservation and rationing

10. Non-Residential Conservation Programs   Commercial ULF Toilet Rebate   Commercial Water Audits   Large Landscape Water Audits Residential Commercial Golf Course   Parks Review and Irrigation Upgrade

11. Residential Conservation Programs   Conservation kit distribution   ULF toilet rebate   High efficiency clothes washer rebate   Plumbing fixture retrofit ordinance   Water audits for top users   Submeters for multifamily units   New construction ordinance

12. Goals of Curtailment Effort   Identify actions customers would take if required to cut back by specified amount   Describe the types of impacts and degree of hardship imposed : - economic - inconvenience - health and safety

13. Use Curtailment Objective Consensus that the maximum level of curtailment in the future should not exceed 25%

14. Eleven supply options identified for evaluation: Brackish groundwater at mouth of San Lorenzo River Brackish groundwater at mouth of San Lorenzo River Fresh groundwater from San Lorenzo river alluvial plain Fresh groundwater from San Lorenzo river alluvial plain Maximized use of existing sources and storage Maximized use of existing sources and storage Groundwater recharge/ Groundwater recharge/ extraction near Wilder Ranch extraction near Wilder Ranch Seawater desalination Seawater desalination Conjunctive use with Soquel Creek Water District Conjunctive use with Soquel Creek Water District Groundwater from Purisima aquifer in Live Oak Groundwater from Purisima aquifer in Live Oak Groundwater from Santa Margarita aquifer near Wilder Ranch Groundwater from Santa Margarita aquifer near Wilder Ranch Groundwater from Santa Margarita aquifer near downtown/eastside Santa Cruz Groundwater from Santa Margarita aquifer near downtown/eastside Santa Cruz Wastewater reclamation Wastewater reclamation Reservoir storage in Olympia Quarry Reservoir storage in Olympia Quarry

15. How do pay for all this while still using rates to encourage conservation?  Five-tier rate structure 1- 4 Billing units$1.36 Ccf 5-9 Billing units$3.47 Ccf 10-14 billing units$4.45 Ccf 15-18 billing units$6.10 Ccf >18 billing units$7.61 Ccf Outside City rates are 27% higher per Ccf

16. How about University growth?  The University is part of that growth we are talking about  The City was concerned with the LRDP and the fact that it counted on water that was not yet developed  How the University can grow as it wants to with an uncertain water source remains to be resolved

17. How uncertain is desalination? 4 Big Issues that could sink the ship 1. Entrainment/entrapment on intakes 2. Disposal of concentrate 3. Growth inducement 4. Energy consumption