Log Cabin Ranch WWTF - Secondary Wastewater Treatment in La Honda, California

Log Cabin Ranch WWTF is a wastewater treatment facility located on Log Cabin Ranch Road in La Honda, San Mateo County, California. It serves a small population of 220 residents in this rural coastal community, operating under the regulatory framework of the US Clean Water Act and state-level permits issued by the California State Water Resources Control Board. The plant provides secondary treatment, which is the standard level required by the US Environmental Protection Agency for municipal wastewater facilities. With a designed capacity of 136.27 megaliters per year and an actual discharge volume of 68.14 megaliters per year, the plant operates at approximately 50% capacity, indicating adequate headroom for current demand. As a coastal facility within 10 km of the Pacific Ocean, the plant's treated effluent likely discharges into local creeks or directly into the ocean, affecting the sensitive marine environment of the California coast. The surrounding watershed supports diverse aquatic life and is part of the broader San Francisco Bay Area ecosystem, where nutrient and pathogen control are critical for protecting coastal water quality.

The plant is situated in the coastal watershed of San Mateo County, with treated effluent likely flowing into small coastal streams that drain directly to the Pacific Ocean. This region supports sensitive marine habitats, including kelp forests and rocky intertidal zones, which are vulnerable to nutrient loading and contaminants. The proximity to the coast underscores the importance of effective secondary treatment to minimize ecological impacts on nearshore waters.