LANAI CITY WWTF - Wastewater Treatment Facility in Lānaʻi City, Hawaii

LANAI CITY WWTF is a wastewater treatment facility located in Lānaʻi City, Hawaii, on the island of Lānaʻi. It serves a population of approximately 2,140 residents, making it a small-scale municipal plant. The facility is situated in Maui County and operates within the unique environmental context of the Hawaiian Islands. As a small agglomeration in the United States, the plant is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting requirements. Plants of this scale typically employ secondary treatment or advanced treatment to meet state and federal water quality standards. The regulatory framework ensures that discharge meets the requirements for protecting sensitive island ecosystems. The plant's treated effluent is discharged into the local environment on Lānaʻi, an island with limited freshwater resources. The receiving waters ultimately drain to the Pacific Ocean, which surrounds the island. The facility plays a critical role in protecting nearshore marine habitats, including coral reefs and coastal waters that support diverse aquatic life and are important for local recreation and tourism.

The plant discharges into the local watershed on Lānaʻi Island, which drains to the Pacific Ocean. The nearshore marine environment includes coral reef ecosystems that are sensitive to nutrient loading and pollutants. Protecting these waters is essential for maintaining biodiversity and supporting the island's tourism-dependent economy.