Wastewater rates are regulated by state public utilities commissions (PUCs). All Hawaii American Water customers are charged rates approved by the PUC in their state.

To determine rates, Hawaii American Water and state PUC staffs study costs of construction, maintenance, operation, administration and financing. Once the studies are complete, the company and PUC present any differing conclusions before an administrative law judge. Based on the judge’s opinion, the PUC sets the wastewater rates.

Rates and billing frequency vary based on geographic area. In many areas, customers are billed on a flat-rate.

Tariff for the Hawaii-Kai community

Rules and Regulations:

Kalahuipua`a Lagoon's wastewater service for the Mauna Lani resort
Waimea wastewater service for Waimea and the Parker Ranch developments