Jeff Biggs of Tucson Water presented recommendations on the Decision H2O program to the Mayor and Council. He summarized Tucson's water history and efforts to shift from groundwater to renewable supplies. Extensive outreach was conducted, including consumer panels that found most prefer the higher 650 mg/L mineral content option. A triple bottom line assessment additionally showed this option has more benefits environmentally and financially, though mineral levels will continue being monitored. The recommendations are to allow mineral content to gradually rise towards Colorado River levels, continue education, and develop long-term salinity plans.

1. Decision H 2 O Summary & Recommendations Jeff Biggs, Tucson Water Presentation to Mayor & Council October 18, 2011

4. Clearwater Program Evolution 1995 2000 2005 2010 2011 1996 CAVSARP Authorized 1998-2000 Target water quality developed & demonstrated 1997 CAVSARP Expanded Pilot Recharge Facility Constructed May 2001 Blended Water Delivery Initiated 2004 – Present SAVSARP (Clearwater Phase II) Implementation 2008 – Present CAP recovery from Pima Mine Rd. Recharge Project via Santa Cruz Wellfield

5. Water Plan: 2000-2050 “ Water Plan: 2000-2050 was developed to initiate a dialogue between Tucson Water and the community about the water-resource challenges which must be addressed in the coming years.”

7. Clearwater Infrastructure Increasing Capacity and Redundancy for Supply Reliability CAVSARP SAVSARP Pima Mine Rd Recharge Project Central Wellfield Santa Cruz Wellfield Avra Valley Wellfield TARP & Southside Wellfield

9. 450 mg/L TDS Was Found to be Acceptable During 1990s Public Outreach ( At the Tap ) Taste and Odor Workshops Bottled Water Distribution Neighborhood Outreach

10. Mall and Traveling Kiosks Consumer testing carried out at three different levels: Flavor Profile Analysis Consumer Panels Determining Customer Preferences

11. Kiosk Results Taste Preference 0% 20% 40% 60% 80% 100% 450 650 No Preference Percentage of Each Choice Total Responses ~ 14,000 Taste Preference 57% 28% 15%

12. Kiosk Results Overall Preference 20% 40% 60% 80% 100% 450 650 No Preference Percentage of Each Choice Total Responses ~ 14,000 Overall Preference 50% 35% 15% 0% 450 650

15. Triple Bottom Line Assessment is one Method to Evaluate Sustainability TBL Assessments Equally Weight Three Factors

16. Triple Bottom Line Assessment

20. Social Category Results Increasing benefit

21. Triple Bottom Line Assessment

24. Environmental Results Increasing benefit

25. Triple Bottom Line Assessment

27. Conceptual Costs Cost Category 450 Option Capital Costs $416 Million Annual Operation & Maintenance Costs (Year 2015) $10 Million Results in a monthly average water bill increase of $11 to $12

28. Financial Category Result Increasing benefit

29. Overall TBL Results Increasing benefit

34. Decision H 2 O Summary & Recommendations Jeff Biggs, Tucson Water Questions? Presentation to Mayor & Council October 18, 2011