Salt or Sewer? Supplemental Water Supplies for Santa Cruz County

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1 Salt or Sewer? Supplemental Water Supplies for Santa Cruz County Northern California Chapter of WateReuse August 22, 2014 Todd Reynolds, P.E. Dawn Taffler, P.E., LEED AP

2 Pasatiempo Capitola Rio Del Mar Live Oak Aptos Seascape La Selva Beach Water Service Boundaries

3 Dependence on Local Hydrology

4 The Need for Supplemental Supplies

5 Water Department Mission Statement: To assure public health & safety by providing a clean, adequate and reliable supply of water.

6 Integrated Water Planning A Public Process with a Citizens Advisory Committee Early 2000 s

7 Regional Desalination Project Up to 2.5 mgd Operate in drought years Average ~1.5 mgd Operate to restore groundwater levels

8 scwd 2 Regional Desalination Project

9 Relative Annualized Unit Cost Potential New Water Supply-.--- Potential New Water Supply Comparing Alternatives $11,000 3,000 $10,000 $9,000 2,500 $8,000 $7,000 2,000 $6,000 $5,000 1,500 $4,000 $3,000 1,000 $2,000 $1, $0 Regional Desal RW Irrigation Seawter Intrusion Barrier GWRRP Res Aug IPR DPR 0

10 Water Supply is a Political Issue

11 It s all fun and games. until the EIR comes along.

12 Political Pressure Fueled by the Desal EIR By 2013 The New City Council took the Heat

13 Back to the Drawing Board Collect Fog Recycled Water Build Dams Limit Growth Thinking Outside the Box Conserve More Offset New Demands Catch Rainwater Conjunctive Use Reuse Graywater

14 Public Perceptions Can and Will Change

15 Potential Recycled Water Alternatives RW for Irrigation Seawater Intrusion Barrier Groundwater Replenishment Reservoir Augmentation Direct Potable Reuse

16 Recycled Water for Irrigation

17 Relative Annualized Unit Cost Potential New Water Supply Potential New Water Supply Comparing Alternatives $11,000 3,000 $10,000 $9,000 2,500 $8,000 $7,000 2,000 $6,000 $5,000 1,500 $4,000 $3,000 1,000 $2,000 $1, $0 Regional Desal RW Irrigation Seawter Intrusion Barrier GWRRP Res Aug IPR DPR 0

18 Seawater Intrusion Barrier Seawater Injection Well

19 Relative Annualized Unit Cost Potential New Water Supply Potential New Water Supply Comparing Alternatives $11,000 3,000 $10,000 $9,000 2,500 $8,000 $7,000 2,000 $6,000 $5,000 1,500 $4,000 $3,000 1,000 $2,000 $1, $0 Regional Desal RW Irrigation Seawter Intrusion Barrier GWRRP Res Aug IPR DPR 0

20 Planned Groundwater Replenishment Urban Water Use WW Treatment Water Treatment RO + UV Graphic Credit: David Smith Groundwater

21 Groundwater Replenishment

22 Relative Annualized Unit Cost Potential New Water Supply Potential New Water Supply Comparing Alternatives $11,000 3,000 $10,000 $9,000 2,500 $8,000 $7,000 2,000 $6,000 $5,000 1,500 $4,000 $3,000 1,000 $2,000 $1, $0 Regional Desal RW Irrigation Seawter Intrusion Barrier GWRRP Res Aug IPR DPR 0

23 Planned Surface Water Augmentation Urban Water Use WW Treatment Water Treatment Surface Water RO + UV Graphic Credit: David Smith

24 Reservoir Augmentation

25 Relative Annualized Unit Cost Potential New Water Supply Potential New Water Supply Comparing Alternatives $11,000 3,000 $10,000 $9,000 2,500 $8,000 $7,000 2,000 $6,000 $5,000 1,500 $4,000 $3,000 1,000 $2,000 $1, $0 Regional Desal RW Irrigation Seawter Intrusion Barrier GWRRP Res Aug IPR DPR 0

26 The New Frontier

27 Direct Potable Reuse Home WW Treatment Water Treatment Nature RO + UV Graphic Credit: David Smith

28 Pipe-to-Pipe Direct Potable Reuse Home WW Treatment Water Treatment Nature RO + UV Graphic Credit: David Smith

29 Relative Annualized Unit Cost Potential New Water Supply Comparing Alternatives $11,000 3,000 $10,000 $9,000 2,500 $8,000 $7,000 2,000 $6,000 $5,000 1,500 $4,000 $3,000 1,000 $2,000 $1, $0 Regional Desal RW Irrigation Seawter Intrusion Barrier GWRRP Res Aug IPR DPR 0

30 But new water supplies cost more than traditional supplies and spark fears of growth

31 Salt or Sewer? Todd K. Reynolds, P.E. Dawn Taffler, P.E., LEED