1. Reclaimed Water and Non-Potable Water at UNC-CH
(Note bullets )
OWASA is an autonomous authority, with its own Board of Directors, etc.
Sally Hoyt, Stormwater Engineer 1

2. 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
UNC non-potable water utility combines RCW & SW. Meters usage, sells to customers at one rate.

3. 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.

4. UNC-CH Potable Water Usage
UNC-CH Potable Water Use
UNC-CH Potable Water Usage
Composite FY06-07 and FY07-08

5. UNC-CH Future Water Use…2010

6. UNC-CH Future Water Use…?

8. 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

9. OWASA RCW Facility

10. Funding UNC Funding > $10,000,000
Debt funded with legislative approval
Debt paid by University internal customers through RCW rates
The first objective addresses our raw water supply (read)

11. Why Rainwater Harvesting?
Town Stormwater Design Criteria (2001) – Adds Volume Control
Jordan Lake Rules (2009) – Nutrient Reduction
UNC entered a period of significant campus growth beginning in the early 2000’s. A master plan was developed. At the same time a campus stormwater plan was developed that highlighted start of art stormwater like green roofs, permeable pavement, and rainwater harvesting. As part of this, stormwater criteria were developed in 2001 specifically for the campus that included one of the early volume control requirements. Also will be used to meet coming requirement to significantly cut nutrient discharges (JL rules).

12. 500,000 gal – Athletic Field Irrig.
Hooker Field Cistern
500,000 gal – Athletic Field Irrig.
Stone bed under rec fields used to irrigate soccer and football practice. Will be backed up with RCW.

13. 56,000 gal – Landscape Irrigation
Ramshead Cistern
56,000 gal – Landscape Irrigation
Used for landscape irrigation.

14. FedEx Global Ed Cistern 54,000 gal – Toilet Flushing
As a result of this building boom, we have 6 cisterns on campus. All underground, large scale from a variety of materials. FedEx Globlal Ed center uses this cistern for toilet flushing. Bag filters and UV disinfection.

15. Hanes Cistern 60,000 gal – Landscape Irrigation
Under historic quad. For landscape irrigation

16. Boshamer Cistern 80,000 gal – Athletic Field Irrigation
Pre-cast concrete vaults. Baseball stadium.

17. Bell Tower Cistern 300,000 gal – Toilet Flushing, Landscape & Athletic Field Irrig.
Bell Tower cistern combines detention with rainwater harvesting and a reclaimed water back-up. Turn over to Kevin to talk about.

18. MAP