Innovative Water Technologies’ Programs

5th Annual Summer Seminar 2015 San Antonio Water Systems

July 24, 2015 By Erika Mancha

The following presentation is based upon professional research and analysis within the scope of the Texas Water Development Board’s statutory responsibilities and priorities but, unless specifically noted, does not necessarily reflect official Board positions or decisions.

2

Mission

To provide • Leadership, • Information, • Education, and • Support for planning,

financial assistance, and outreach

for the conservation and responsible development of water for Texas.

3

Texas Water Development

Board

Water Science &

Conservation

Water Supply &

Infrastructure

Operations & Administration

Finance

Mission

To provide • research, • develop, and • disseminate

information to advance the development of innovative water management strategies in Texas.

Innovative Water

Technologies

Aquifer Storage

Recovery (ASR)

Water Reuse Desalination

Brackish Resources

Aquifer Characterization System (BRACS)

Rainwater Harvesting

Aquifer Storage and Recovery (ASR)

San Antonio Water Systems City of Kerrville El Paso Water

Utilities

Production Capacity 60 MGD 2.65 MGD 12 MGD

Operational 2004 1998 1985

Source Groundwater Treated surface water Treated Wastewater

Aquifer Carrizo Lower Trinity Hueco Bolson

Feasibility studies funded in 1990s

An Assessment of Aquifer Storage and Recovery in Texas in 2011

Geological Characterization and Data Collection in the Corpus Christi

Technical Note 15-04 Aquifer Storage and Recovery in Texas 2015

• Published June 2015 • Regulatory Framework • Past activities • Current Facilities • 2012 State Water Plan • Other Investigations

6

7

• Historical Activity

• Existing Facilities

• Studies

• Evaluations

• Recommended Water Management Strategies in 2012 State Water Plan

Aquifer Storage and Recovery Activities in Texas

Demonstration Projects for Alternative Water Supplies Grants

• 84th Texas Legislature appropriated from General Revenue Fund $1,000,000 for Fiscal Year 2016 and 2017

• Senate Bill 1, Rider 25 “…for demonstration projects or feasibility studies to prove up certain aquifer storage and recovery projects or any other demonstration projects or feasibility studies that will create new water supplies or otherwise increase the availability of water through use of innovative storage approaches that improve operational efficiencies.”

• Groundwater Conservation Districts to provide matching funds

8

Rainwater Harvesting

9

• Annual competition program established in October 1, 2007

• Open to all individuals, companies, organizations, municipalities, and local/state governmental entities in Texas

• Three categories – Residential,

– Commercial/industrial, and

– Educational/governmental

• Judging criteria available on the website

• Winners announced at our board meeting in spring and feature on TWDB’s website

10

Rainwater Harvesting Reports

11

Rainwater Harvesting Training Under Local Government Code §580.004

12

Brackish Resources Aquifer Characterization System (BRACS)

• Map and characterize brackish aquifers of the state

• ~2.7 billion acre-feet of brackish groundwater

BRACS Study Areas

14

BRACS Reports

Pecos Valley Aquifer • Foundation for methods

Data Dictionary • Describes structure of

the database

15

BRACS Data

• Database – Microsoft Access 2007 format – Well data (water, oil/gas)

• ~47,000 data records

• GIS data – Total Dissolved Solid Values

• Geophysical well logs – Available upon request

16

Relating to the Development

Brackish Groundwater House Bill 30 (84th Texas Legislature)

• $2,000,000 from General Revenue Fund • Four aquifers must be completed by December 2016

– Carrizo-Wilcox Aquifer located between the Colorado and Rio Grande Rivers,

– Gulf Coast Aquifers and sediments bordering that aquifer,

– Blaine Aquifer, and

– Rustler Aquifer

• Other selected aquifers - must be completed by December 2017

• Designate brackish groundwater production zones • Estimate 30- and 50-year production without causing significant impact

to fresh water aquifers • Include the four aquifer reports, in biennial desalination report due

December 1, 2016 (Water Code Sec. 16.060) • Remaining aquifers in the state will be mapped by 2022

17

18

Desalination Plants

Desalination Plant Capacity in Texas

19

12 14

38 44 46

22 MGD 30 MGD

75 MGD

120 MGD 123 MGD

0

20

40

60

80

100

120

140

1999 2001 2005 2010 2012

Plan

t Cap

acity

Mill

ion

Gal

lons

per

Day

(MG

D)

and

Num

ber

of F

acili

ties

Year

Number of Facilities Plant Capacity

Desalination Reports Guidance Manual for Permitting Class I and Class II Wells for the

Injection and Disposal of Desalination Concentrate

Developing Practical Alternatives to Pilot Plant Studies for Innovative

Water Technologies

20

Seawater Desalination

• One operational seawater desalination facility in Florida – Tampa Bay Seawater Desalination Plant (25 million gallons

per day)

• Second plant is currently being built in California

– Carlsbad Desalination Project (50 million gallons per day)

21

22

ID Project Feasibility Pilot

1 Laguna Madre Yes Yes

2 Brownsville Yes Yes

3 San Antonio -- --

4 Freeport Yes --

5 Corpus Christi Yes --

6 GBRA Yes --

6 Guadalupe-Blanco River Authority

Seawater Desalination Reports

23

• Sixth report in series • 12 years of activities

toward advancing seawater desalination

• Provides a status update

Direct Potable Water Reuse Existing and Proposed Facilities

24

• Raw Water Production Facility

– Operating since May 2013

• Direct Potable Reuse Project – Operating since July 2014

(emergency project)

• Advanced Purified Water Treatment

– Completed piloting protocol

• Direct potable reuse project – Awaiting city council approval

Evaluating the Potential for Direct Potable Reuse

• Contaminants of Concern • Water quality performance targets • Water quality characterization • Source control • Treatment technologies • Environmental buffers • Quantitative relative risk assessment • Pilot protocols • Regulatory summary • Public awareness and outreach

25

Testing Water Quality in a Municipal Wastewater Effluent Treated to Drinking Water Standards

Quarterly sampling Chemicals of Emerging

Concern microbial pathogens

Develop correlations for surrogates compounds

Guidance document for monitoring at direct potable reuse facilities

26

Sample Locations

27

Brazos River Research Wetland • Engineered wetland constructed in Waco, Texas to

evaluate how endocrine disrupting compounds can be reduced from treated wastewater effluent.

28

Erika Mancha Innovative Water Technologies (512) 463-7932 erika.mancha@twdb.texas.gov

Innovative Water Technologies www.twdb.texas.gov/innovativewater/index.asp

2012 Water Usage in Texas

30

2.0 % Reused ~319,000 acre-feet

16,012,545 acre-feet Total Water Use

4,470,999 acre-feet Municipal Water Use

5.8 % is Reused ~261,451 acre-feet

2012 Water Use Survey