A small water district in the Central Coast Mountains, received a letter of noncompliance from Santa Cruz County Department of Health because of concerns with the surface water treatment system and disinfection system. We provided internal and external support to the water district, including meeting with the oversight agency representative to address the concerns. To the extent possible, we enabled the district, thereby limiting their cost for compliance. As part of our services, we developed a compliance plan, identified equipment vendors, developed engineering estimates, and helped the district in decision-making. In another case, we designed a slow sand water treatment system to provide drinking water for a small number of connections. The water supply emanated from a water diversion on a small creek. Design of a slow sand filter was proposed because it could operate remotely without electrical power and is an approved filtration technology according to Title 22 of the California Code of Regulations.