Impacts of Municipal Impacts of Municipal Conservation and Reuse Conservation and Reuse Strategies in Region CStrategies in Region C

Dan HardinDan Hardin

Director, Water Resource Director, Water Resource PlanningPlanning

Texas Water Development Texas Water Development BoardBoard

Senate Bill 3Senate Bill 3

““The Study Commission shall:”The Study Commission shall:”

(3) determine whether water demand (3) determine whether water demand in the Region C Regional Water in the Region C Regional Water Planning Area may be reduced Planning Area may be reduced through additional conservation and through additional conservation and reuse measures so as to postpone reuse measures so as to postpone the need for additional water the need for additional water suppliessupplies

Volume Expected to be Saved Through Municipal Conservation Strategies, 2006

Regional Water Plans

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Region C Rest of Texas

47 percent of all municipal conservation in Texas in 2060.

Volume Expected to be Saved Through Municipal Reuse Strategies, 2006 Regional

Water Plans

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Region C Rest of Texas

86% of all municipal reuse in Texas in 2030.

By 2030, Region C expects to By 2030, Region C expects to meet 33% of its municipal meet 33% of its municipal demand through conservation demand through conservation and reuse strategies.and reuse strategies.

Gallons per capita per dayGallons per capita per day• Measure of municipal water use, Measure of municipal water use,

defined as the average daily total of defined as the average daily total of residential residential plus plus commercial commercial plus plus institutional water use, divided by institutional water use, divided by total resident population.total resident population.

• Water is used at home Water is used at home andand at place at place of work.of work.

• In 2007:In 2007: DallasDallas San AntonioSan Antonio Total GPCDTotal GPCD 240 240 150 150 Residential GPCDResidential GPCD 92 92 86 86

Influences on Gallons per Influences on Gallons per capita per daycapita per day• All other things equal, GPCD will be All other things equal, GPCD will be

higher in regions/cities where the higher in regions/cities where the daytime population is augmented by daytime population is augmented by commuters who live in a different commuters who live in a different region/city. region/city. – Dallas adds 290,000 net commuters on a Dallas adds 290,000 net commuters on a

daily basis (23% of the population), San daily basis (23% of the population), San Antonio adds less than 50,000 (3.8% of the Antonio adds less than 50,000 (3.8% of the population)population)

– In the western counties of Region D (Delta, In the western counties of Region D (Delta, Hopkins, Hunt, Lamar, Rains, Van Zandt, Hopkins, Hunt, Lamar, Rains, Van Zandt, Wood), 22% of the total workforce Wood), 22% of the total workforce commuted to a job in Region C (2006 data).commuted to a job in Region C (2006 data).

Planning Regions ranked by Planning Regions ranked by Municipal GPCD, 2000Municipal GPCD, 2000

• PP 133133

• DD 141141• LL 149149• HH 157157• II 160160• MM 164164• BB 165165• NN 165165

• KK 168168• OO 172172• GG 174174• EE 176176• FF 198198

• CC 203203• JJ 205205• AA 214214

Current Progress Toward GPCD Current Progress Toward GPCD GoalsGoals

Region CRegion C Region DRegion D

Estimated GPCD, 2000Estimated GPCD, 2000 203203 141141

Projected GPCD, 2010 (afterProjected GPCD, 2010 (after

conservation & reuse)conservation & reuse) 171171 139139

Actual GPCD, 2007Actual GPCD, 2007 172172 150150

Planning Regions ranked by Municipal Planning Regions ranked by Municipal GPCD, 2030 (after savings from GPCD, 2030 (after savings from conservation and reuse strategies)conservation and reuse strategies)

• PP 123123• LL 127127• EE 128128• KK 129129

• DD 134134• CC 136136• HH 137137• MM 142142

• II 146146• GG 154154• NN 155155• OO 156156• BB 157157• AA 169169• FF 171171• JJ 176176

Municipal GPCD - After Conservation and Reuse Water Management Strategies

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Region C Region D Texas

Is More Conservation Is More Conservation Enough?Enough?

• Would additional conservation by Would additional conservation by Region C be sufficient to eliminate all Region C be sufficient to eliminate all municipal needs?municipal needs?

• Needs – Projected water demands in Needs – Projected water demands in excess of existing supplies that excess of existing supplies that would be physically and legally would be physically and legally available during a repeat of the available during a repeat of the drought of record.drought of record.

Contribution of Conservation Contribution of Conservation and Reuse to Region C and Reuse to Region C Municipal NeedsMunicipal Needs

MunicipaMunicipal Needsl Needs

ConservatioConservation and n and

Reuse Reuse

RemaininRemaining Needsg Needs

20102010 291,008291,008 268,264268,264 22,74422,744

20202020 578,142578,142 522,919522,919 55,22355,223

20302030 829,235829,235 678,715678,715 150,520150,520

20402040 1,082,231,082,2399

730,054730,054 352,185352,185

20502050 1,380,141,380,1444

788,689788,689 591,455591,455

20602060 1,737,031,737,0377

848,379848,379 888,658888,658

Further Savings if Region C Further Savings if Region C GPCD Equal to Region DGPCD Equal to Region D

RemaininRemaining Needsg Needs

Additional Additional Savings, Savings, “Equal” “Equal” GPCD GPCD

Still Still RemaininRemainin

g Needsg Needs

20102010 22,74422,744 237,481237,481

20202020 55,22355,223 89,23589,235

20302030 150,520150,520 20,37320,373 130,147130,147

20402040 352,185352,185 34,43434,434 317,751317,751

20502050 591,455591,455 77,69377,693 513,762513,762

20602060 888,658888,658 146,603146,603 742,055742,055

What Part of Remaining Needs What Part of Remaining Needs Could be Met if Region C GPCD Could be Met if Region C GPCD was Equal to Region D GPCD?was Equal to Region D GPCD?• 2030 – 13.5%2030 – 13.5%• 2040 – 9.8%2040 – 9.8%• 2050 – 13.1%2050 – 13.1%• 2060 – 16.5%2060 – 16.5%

Even if Region C’s GPCD were reduced Even if Region C’s GPCD were reduced to the same level as Region D, there to the same level as Region D, there would be remaining unmet municipal would be remaining unmet municipal needs in Region C of nearly 750,000 needs in Region C of nearly 750,000 acre-feet in 2060.acre-feet in 2060.