AGANA DISTRICT WWTF - Hagåtña Municipality, Guam Wastewater Treatment Plant

AGANA DISTRICT WWTF is a municipal wastewater treatment facility located in Hagåtña Municipality, Guam, United States. The plant serves a population of approximately 79,386 and has a designed capacity of 1.00 million gallons per day. As a facility on the island of Guam, it plays a critical role in managing wastewater from the capital region. The plant operates under the U. S. Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Guam Environmental Protection Agency. For a facility of this scale, secondary treatment is typically required, with additional nutrient removal if discharging to sensitive waters. The plant's proximity to the coast (within 50 km) means that treated effluent must meet stringent standards to protect marine ecosystems. The treated wastewater from AGANA DISTRICT WWTF is discharged into the Pacific Ocean via the Philippine Sea. Guam's coastal waters support diverse marine life, including coral reefs and seagrass beds, which are sensitive to nutrient pollution. The plant's operation is essential for maintaining water quality in the surrounding marine environment and protecting public health.

The plant discharges into the Pacific Ocean near the Philippine Sea, which surrounds Guam. The coastal waters host sensitive coral reef ecosystems and seagrass beds that provide habitat for fish and marine invertebrates. Nutrient loading from wastewater can lead to algal blooms and coral degradation, making effective treatment critical for preserving local biodiversity and supporting the island's tourism-dependent economy.