Waianae WWTP, Waianae | USA Wastewater

Overview

Waianae WWTP serves approximately 37,000 residents in Waianae, Hawaii. The plant operates under the U.S. Clean Water Act, with NPDES permits regulating its discharge to protect local waters.

Waianae WWTP is a municipal wastewater treatment facility located on Analipo Street in Waianae, on the island of Oahu, Hawaii. Serving a population of around 36,884, the plant is part of the region's essential water infrastructure, handling domestic wastewater from the community. Under the U.S. Clean Water Act, wastewater treatment plants of this scale are required to meet secondary treatment standards through National Pollutant Discharge Elimination System (NPDES) permits. These permits set effluent limits to protect water quality, and the plant's operations are subject to state and federal oversight to ensure compliance. The treated effluent from Waianae WWTP is discharged into the Pacific Ocean, as the plant is located near the coast of Oahu. The surrounding marine environment supports diverse aquatic life, including coral reefs and nearshore habitats that are sensitive to nutrient and pollutant inputs. Proper treatment is critical to preserving the ecological health of Hawaii's coastal waters.

Environmental context

Waianae WWTP discharges treated wastewater into the Pacific Ocean off the west coast of Oahu. The nearshore waters support coral reef ecosystems and are important for native marine species. Nutrient loading from wastewater can impact water quality and reef health, making effective treatment vital for the local marine environment.

Frequently asked questions

Waianae WWTP is located on Analipo Street in Waianae, Honolulu County, Hawaii, on the island of Oahu.

The plant serves approximately 36,884 residents in the Waianae area.

The treated effluent is discharged into the Pacific Ocean, as the plant is situated near the coast of Oahu.

The plant operates under the U.S. Clean Water Act, which requires NPDES permits for wastewater discharges. These permits set effluent limits to protect water quality.

Plants of this size typically provide secondary treatment, which includes biological processes to remove organic matter and suspended solids, as mandated by the Clean Water Act.