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Executive Summary
<br />The statewide population growth from 2000 to 2030 is
<br />projected to be about 65 percent. The three fastest
<br />growing basins, on a percentage basis, are the Colorado
<br />(99 percent), Dolores/San Juan/San Miguel (89 percent),
<br />and Gunnison (82 percent) - each with annual average
<br />growth rates over 2 percent and with populations that will
<br />nearly double over the 30-year period. The more highly-
<br />populated basins, the Arkansas and South Platte, have
<br />projected population growth rates of 55 percent and
<br />65 percent, respectively, over this period.
<br />By 2030, the Arkansas Basin and the South Platte Basin
<br />will be home to a combined total of almost 2.4 million
<br />additional residents, bringing the total population in these
<br />two basins to over 6 million people, which represents
<br />over 86 percent of Colorado's population. In 2030, about
<br />79 percent of the state's population will reside in the
<br />following 11 counties: Adams, Arapahoe, Boulder,
<br />Broomfield, Denver, Douglas, Jefferson, Larimer, and
<br />Weld (South Platte Basin); and EI Paso and Pueblo
<br />(Arkansas Basin).
<br />Average M&I per capita water use (measured by taking
<br />all M&I water demand divided by permanent population)
<br />ranges from 206 gallons per capita per day (gpcd) in the
<br />South Platte Basin to over 330 gpcd in the Rio Grande
<br />Basin (Figure ES-3).
<br />Per capita use rates can be difficult to directly compare
<br />between counties or basins. High per capita rates are not
<br />necessarily indicative of inefficient use, much as low
<br />rates do not necessarily imply efficient use. For example,
<br />water use related to tourism is reflected in historical
<br />demand data but not in census data, thus increasing the
<br />calculated per capita demands. Major industrial water
<br />uses could also drive per capita values upward.
<br />Arkansas 214
<br />Colorado 244
<br />Dolores/San Juan 220
<br />Gunnison 226
<br />North Platte 267
<br />Rio Grande 332
<br />South Platte 206
<br />YampaNVhite 230
<br />0 50 100 150 200 250 300 350
<br />Average Per Capita M&I Water Use (gallons per day)
<br />Figure ES-3
<br />M&I Per Capita Water Use (2000)
<br />J~~a
<br />$~ole'ri~ice Wo~e' $upplY Initia~ive
<br />Residential or commercial properties such as golf
<br />courses might be irrigated from non-municipal sources,
<br />such as wells or ditch rights, lowering the calculated per
<br />capita demand.
<br />Without additional conservation, annual M&I and self-
<br />supplied industrial (SSI) water demands would be
<br />projected to increase from 1,194,900 acre-feet (AF) in
<br />2000 to 1,926,800 AF by 2030 based on population
<br />projections and per capita use rates. However, water
<br />conservation that results from the 1992 National Energy
<br />Policy Act is projected to reduce the estimated 2030
<br />annual demands by about 101,900 AF. In SWSI, this
<br />level of conservation is described as Level 1
<br />conservation. This federal legislation established
<br />maximum water use standards for certain residential and
<br />commercial indoor plumbing fixtures. This conservation
<br />does not reflect the active measures such as metering
<br />and water rate pricing that are being implemented,
<br />planned, or considered by many water providers across
<br />the state, and that are considered in SWSI as a future
<br />water supply option for meeting demands. These
<br />measures are included in "Levels 2 through 5"
<br />conservation is described in more detail in the full report.
<br />Figure ES-4 shows the increase in statewide M&I and
<br />SSI water use by 2030, while Table ES-1 presents these
<br />water uses by basin.
<br /> z,ooo,ooo
<br />~
<br />~
<br />
<br />~ 1,750,000
<br />U
<br />a
<br />1
<br />500
<br />000
<br />a ,
<br />,
<br />~ 1,250,000
<br />~
<br />~
<br />~
<br />1,000,000
<br />~
<br />
<br />~
<br />~ 750,000
<br />
<br />m 500,000
<br />~
<br />~ 250,000
<br /> 0
<br /> 2000 2030
<br />M&I = m unicipal and industrial
<br />SSI = self supplied industrial
<br />Figure ES-4
<br />Projected M&I Water Demand
<br />~~
<br />Level 1 Conservation Savings i ~~ r'rj..'_ r r`
<br />~
<br />Net /ncrease in demand .
<br />= 63Q 000 AF
<br />
<br /> .~ j~_i _~~~~,
<br /> . •~~
<br />
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<br />S:\REPORT\WORD PROCESSING\REPORT\EXEC SUMMARY 11-10-04.DOC ES-9
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