Reclaimed water and non potable water at unc ch
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Reclaimed Water and Non-Potable Water at UNC-CH . Sally Hoyt, Stormwater Engineer. What is Non-Potable Water?. Water from multiple sources that is suitable for non-potable uses Cooling Towers Toilet Flushing Irrigation Sources of non-potable water at UNC are Reclaimed Water from OWASA

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Reclaimed Water and Non-Potable Water at UNC-CH

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Reclaimed Water and Non-Potable Water at UNC-CH

Sally Hoyt, Stormwater Engineer


What is Non-Potable Water?

Water from multiple sources that is suitable for non-potable uses

  • Cooling Towers

  • Toilet Flushing

  • Irrigation

    Sources of non-potable water at UNC are

  • Reclaimed Water from OWASA

  • Stormwater


Why Non-Potable Water?

Water Conservation

  • Campus sustainability

    • LEED Buildings

  • State water conservation requirements

    • 20% indoor

    • 50% outdoor

      Achieved >25% reduction through demand-side efforts. Non-potable water looks at supply-side.


UNC-CH Potable Water Use

UNC-CH Potable Water Usage

Composite FY06-07 and FY07-08


UNC-CH Future Water Use…2010


UNC-CH Future Water Use…?


Why are we using Reclaimed Water?

UNC-OWASA-Community Benefits:

  • Reduce risk to droughts

  • Save drinking water for human use

  • Defer need for expanding water supply and/or treatment plant capacity

  • Expand total supply of water to the community

  • Reduce discharge of nutrients


OWASA RCW Facility


Funding

  • UNC Funding > $10,000,000

  • Debt funded with legislative approval

  • Debt paid by University internal customers through RCW rates


Why Rainwater Harvesting?

  • Town Stormwater Design Criteria (2001) – Adds Volume Control

  • Jordan Lake Rules (2009) – Nutrient Reduction


  • Hooker Field Cistern

    500,000 gal – Athletic Field Irrig.


    Ramshead Cistern

    56,000 gal – Landscape Irrigation


    FedEx Global Ed Cistern54,000 gal – Toilet Flushing


    Hanes Cistern 60,000 gal – Landscape Irrigation


    Boshamer Cistern80,000 gal – Athletic Field Irrigation


    Bell Tower Cistern300,000 gal – Toilet Flushing, Landscape & Athletic Field Irrig.


    MAP


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