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2020_02-27_PWETCpacket
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2020_02-27_PWETCpacket
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2/21/2020 3:27:43 PM
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Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
2/27/2020
Commission/Committee - Meeting Type
Regular
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POTABLE WATER AND SEWERS <br />The potable water production sector (wells, pumps, reservoirs, and the water treatment plant facilities) is <br />second largest emitter of GHGs. Potable water accounts for about a quarter of the GHG emissions from city <br />operations. Emissions from this sector have been declining over the past several years, in part due to Xcel <br />Energy's cleaner grid mix, and to an increase in efficiency of variable drive motors. <br />Many of the water treatment plants and pumps have seen a decrease in energy use in the 10-year period of the <br />analysis. However, there are a few plants and pumps that have increased energy consumption, including Water <br />Treatment Plants 1 and 10, and Well 10 Pump House. <br />The major source of emissions from potable water production comes from electricity. <br />GHG Emissions by Energy Type for <br />Potable Water <br />■ Electricity ■ Natural Gas <br />Figure 13 GHG emissions from electricity and natural gas consumption for potable water <br />City Action <br />Identify opportunities to improve efficiency and increase renewable energy production and consumption. <br />• Continue efforts to improve the efficiency of potable water delivery <br />• Enter energy use data into B3 <br />• Identify possible sites for ground mount solar and storage <br />o Ground mount solar and storage have the added benefit of increasing the resilience of the water <br />supply system by providing electricity to the system in the event of a power disruption <br />• Purchase RECs for the remaining electricity usage <br />• Encourage residents and businesses to reduce water consumption through conservation <br />• Reduce water consumed by city operations <br />o Increase native, drought resistant plant coverage <br />o Collect and use rainwater as an alternative to pumped water for landscape irrigation <br />The following measures can be tracked using GreenStep Cities Step 4: <br />• Residential gallons used per person per day <br />• Business gallons used per job per day <br />• Annual city operations' gallons <br />• Annual energy used per million gallons of water <br />
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