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COI.ORADO c a+a ? '.. ya cevnarawNn oF Statewide WaTer Supply Initintive ? NATLTItAL q?;F ' RFSCXJRCGS Attachment 1 Update on Municipal, Agricultural Demand Industrial and Forecasts March 2004 Municipal and Industrial (M&I) Demand Forecasts Preliminary M&I demand forecasts have been prepared based on projected population growth. The baseline preliminary forecast initially assumed that water use patterns (i.e.; per capita water use) will remain constant through 2030. Finalizing the M&I demand forecast will include the reduction of per capita demands for fuiure growth by approximately 5- 6% to reflect the future impacts of the National Energy Policy Act of 1992. This act set manufaciuring standards for improved water efficiency for toilets, urinals, showerheads and faucets. These standards became effective in 1994. The standards for commercial fixtures became effective in 1997. These standards affect the types of water using fixtures available for new construction as well as remodeled or renovated facilities. As a result, future per capita demands will decrease from the 2000 baseline demand. An additional adjustment to the baseline demand will include the addition of expected water demands related to the additional power generation needed to pxovide electricity ta the increased population. The revised baseline M&I demand forecasts will be bracketed by developing reasonably probable high and low water demand forecasts. The high water demand forecast will include population growth greater than the State Demographer's projection and estimates of higher per capita water use related to more industrial and other non-residential water demands as a percentage of future water use compared to the baseline water use forecast. The low water demand forecast will include lower than projected population growth and estimates of lower per capita water use related to less industrial and other non-residential water use as a percentage of future water use. Many water providers have indicated that they will implement additional water conservation practices to reduce future demands. An estimate of the potential impacts of the increased implementation of water conservation practices currently employed in Colorado will be made and catalogued as short term options to meet future demands. These conservation practices include increasing block rate water pricing, landscape regulations favoring low water using plants, and conservation incentives such as rebates for irrigation controllers and high efficiency clothes washers. Other water conservation measures that are not in common use in Colorado DRAFT ? • • S:Wieetin95\CWCB Board\Demantl Forecasts memo to CWCB 317-04 meeting-revised.doc