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installed PV capacity. There were also 17 grants awarded, totaling $195,600 and 287 kW of <br />installed PV capacity29. In this program, awardees have nine months to complete installations <br />after approval. <br />6.2.3 Materials Sector <br />Materials used combine to make up 19% of total GHG emissions in Louisville. The <br />following set of sustainability initiatives is targeted at this major emitting sector. <br />6.2.3.1 Low Cost Initiatives <br />Water Use Restrictions <br />Louisville already has a water conservation rebate program in place30 which offers <br />rebates for the purchases of energy efficient clothes washing machines and water - conserving <br />landscaping materials. Conducting a study of this program, including identifying barriers to <br />enrollment, determining overall impact, and identifying opportunities for expansion, would <br />provide useful insight for the improvement of this program and future design of similar <br />programs. <br />Monthly data has shown that water use in Louisville nearly quadruples in summer <br />months (see Figure 4) compared to winter months. This indicates that summer irrigation is a <br />major consumer of water in Louisville. Yearly data also shows that total annual water use <br />increased 11.5% from 2011 to 2012. Enacting irrigation limits and promoting wastewater reuse <br />for irrigation during summer months would work toward reducing overall water consumption <br />and reduce related GHG emissions, but may be difficult or expensive to enforce. <br />31 <br />