Loretto's Wellhead Protection Plan The City of Loretto's Wellhead Protection Plan was amended in 2013. The purpose of the plan is to ensure the protection of the city's drinking water supply. Please see the documents below for more information. Wellhead Protection Plan (Amendment) 06.12.2013 Map of Drinking Water Supply Management Area (DWSMA) Wellhead Protection Educational Brochure Loretto Nonvulnerable WHP Plan Extension 10.27.22