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City of Santa Cruz Water

City of Santa Cruz Water. System Overview. 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. Sources of Supply. Newell Creek.

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City of Santa Cruz Water

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

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

  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 • Entrainment/entrapment on intakes • Disposal of concentrate • Growth inducement • Energy consumption

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