Domestic wells' impact on Arizona aquifers and streams is not well quantified but important to water providers, cities and counties in meeting future water needs. This report provides a replicable methodology to estimate the conservation potential of domestic wells in the Sierra Vista Subwatershed.

The effect of domestic wells on aquifers and streams in Arizona is not well quantified. Because these wells do not require metering, estimates of their pumpage can vary. Nonetheless, the total demand from domestic wells is potentially large and important to water providers, cities and counties as they plan and develop strategies to meet future water needs, including water conservation programs. Due to the uncertainty in demand, Western Resource Advocates contracted Plateau Resources LLC to develop a methodology to estimate the conservation potential of domestic wells in the Sierra Vista Subwatershed. While this study does not report a total domestic well demand for the region, it does present recent and new household estimates and identifies areas with water conservation potential. Such information may help water managers in the subwatershed better understand domestic well use characteristics and design and implement appropriate water conservation programs. The methodology developed here is likely also transferable to other areas of Arizona and the western United States