Yes, you can contact the San Mateo County Environmental Health Division at 650-372-6200, or on-line at www.co.sanmateo.ca.us/portal/site/smc.
The Pacifica Police Station at 2075 Coast Highway has a receptacle in their lobby specifically for this use.
The San Mateo County Division of Environmental Health is responsible for inspecting and rating restaurants in the City. They can be reached at 650-372-6200 or on-line at www.co.sanmateo.ca.us/portal/site/smc.