WaterSense Meets EPA Criteria Choosing a water-efficient faucet is one small, easy way to reduce water usage. The Loki collection, like all Brizo bath collections, delivers 1.5 gallons of water per minute without ever sacrificing performance. Combining a striking architecture with high performance, the Loki bath faucet is WaterSense labeled, certified by a third party to meet U.S. Environmental Protection Agency requirements.