direct nonpotable water reuse feasibility study public meeting october 2011
TRANSCRIPT
Direct Nonpotable Water Reuse Feasibility Study
Public Meeting
October 2011
What is “Direct Nonpotable Water Reuse” (and why are we talking about it)?
Municipal wastewater treated to standards that allow for its safe reuse.
A “drought-proof” water resource
The only source of water that automatically increases with economic and population growth
“Currently, 190 utilities in 115 Texas counties report some form of water reuse. The total amount of municipal wastewater reuse reported for 1998 was approximately 160 MGD (Million gallons per day), and golf course irrigation, manufacturing, and cooling towers are the primary users.”
Water Reuse in Texas
Texas Water Development Board
Counties with the highest amounts of municipal reuse in Texas
County Municipal Reuse (MGD)
Bexar 37.8
Collin 29.0
Potter 13.9
Midland 10.5
Travis 9.4
http://www.twdb.state.tx.us/assistance/conservation/Municipal/Reuse/ReuseArticle.asp
Regional Water Planning Groups
2060 Recommended Water Management Strategies ‐ Relative Volumes
Water for Texas: Summary of the 2011 Regional Water Plans
South Central Texas Regional Water Planning Group
Municipal water conservation water management strategy was based on water conservation Best Management Practices (BMPs) for municipal water users, as included in the Water Conservation Implementation Task Force November 2004 Report to the 79th Texas Legislature.
The list of Municipal Water Conservation BMPs included:9. Landscape Irrigation Conservation and Incentives;10. Water-Wise Landscape Design and Conversion Programs;11. Athletic Field Conservation;12. Golf Course Conservation;16. Reuse of Reclaimed Water;20. Park Conservation;
2006 South Central Texas Regional Water PlanVolume I — January 2006Section 6 - Water Conservation and Drought Management Recommendations
South Central Texas Regional Water Planning Group
2011 South Central Texas Regional Water PlanVolume II - September 2010
Population
Water for Texas: Summary of the 2011 Regional Water Plans
Population
1990 2000 2010 2020 2030 2040 2050 20600
10,000
20,000
30,000
40,000
50,000
60,000
2011 South Central Texas Regional Water Plan
City of Kyle
Population
1990 2000 2010 2020 2030 2040 2050 20600
10,000
20,000
30,000
40,000
50,000
60,000
2011 South Central Texas Regional Water Plan (adjusted for 2010 Census results)
City of Kyle
Population
2010 Kyle Comprehensive Plan
Texas Reclaimed Water RegulationsTexas Commission on Environmental Quality
Chapter 210 - Use of Reclaimed WaterQUALITY CRITERIA AND SPECIFIC USES FOR RECLAIMED WATER
Type I Potential Uses Irrigation of landscaping, public parks, golf courses, and athletic fields Fire protection Irrigation of food crops and pastures for milking animals Toilet or urinal flush water
Type II Potential Uses Irrigation of sod farms, silviculture, limited access rights-of-way Irrigation of animal feed crops and food crops without contact with edible part or with pasteurization Soil compaction or dust control Cooling tower makeup water
Texas Reclaimed Water RegulationsTexas Commission on Environmental Quality
Chapter 210 - Use of Reclaimed WaterQUALITY CRITERIA AND SPECIFIC USES FOR RECLAIMED WATER
Type I Type II Type II(pond system)
Quality Standards(30 day avg.)
• BOD5/CBOD5 = 5 mg/l• Turbidity = 3 NTU• Fecal coliform <20 or
<75 CFU/100 mL (single grab sample)
• BOD5 = 20 mg/l• CBOD5 = 15 mg/l• Fecal coliform <200
or <800 CFU/100 mL (single grab sample)
• BOD5 = 30 mg/l• Fecal coliform <200
or <800 CFU/100 mL (single grab sample)
Sampling/Analysis Frequency 2 X per week 1 X per week 1 X per week
Study Objectives How much water is available for reuse?
How much water is needed for Plum Creek GC?
How much water could be used to sustain city parks and medians?
Are there other potential users and uses?
What are the environmental considerations?
What are the options for delivering reclaimed water?
What will it cost to build the infrastructure?
What will the water cost?
Is it affordable?
How much is available for reuse?
How much is available for reuse?
2006 2007 2008 2009 20100.000
100.000
200.000
300.000
400.000
500.000
600.000
700.000
800.000
900.000
Avg. Flow Linear (Avg. Flow) Linear (Avg. Flow)
MG
/yr.
Delivery Options Kyle Wastewater Treatment Plant
10/15/3 Pipeline routes Storage options Additional Treatment for
Type 1
Satellite (Scalping) Plants Interceptors Flow
What’s Next?
Sep-12 Oct-12 Nov-12Mar-12 Apr-12 May-12 Jun-12 Jul-12 Aug-12Oct-11 Nov-11 Dec-11 Jan-12 Feb-12
Public Meeting
Draft Report Submittal Project Completion
