DC Tillman WRP - Major Wastewater Treatment Plant in Los Angeles, California

DC Tillman WRP is a major wastewater treatment facility located in the Encino neighborhood of Los Angeles, California. Serving a population of 1,100,000, it is one of the larger treatment plants in the region, supporting the city's extensive municipal wastewater infrastructure. The plant's designed capacity is 1.00 (likely in million gallons per day or similar unit). As a US facility, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board. For a plant of this scale, advanced treatment is typically required to meet stringent water quality standards. The plant discharges treated wastewater into the Los Angeles River, which flows through the city and ultimately reaches the Pacific Ocean at Long Beach. This river supports urban aquatic habitats and is an important corridor for migratory birds. The discharge contributes to the region's water reclamation efforts, with some effluent used for groundwater recharge and irrigation.

The plant's treated effluent enters the Los Angeles River, a highly urbanized waterway that flows through Los Angeles County before emptying into the Pacific Ocean at the Port of Long Beach. The river supports a variety of fish and bird species despite heavy modification. Downstream, the coastal waters are part of the Southern California Bight, an ecologically productive area that sustains marine life including kelp forests and gray whales. The plant's discharge must meet strict nutrient and pollutant limits to protect these downstream ecosystems.