Limited Domestic and Nondomestic Wastewater Treatment System Permits – Lahontan Region

Water Drop

Lahontan Regional Water Quality Control Board (Lahontan Water Board) staff are developing two draft general waste discharge requirements (General Orders) applicable to facilities located within the Lahontan Region: Waste Discharge Requirements for Limited Domestic Wastewater Treatment Systems and Waste Discharge Requirements for Small Nondomestic Wastewater Treatment Systems. Both General Orders are intended to improve water quality protection through effective regulation of small-scale wastewater treatment facilities.


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Supporting Documentation

CEQA Process

General Orders Development

Lahontan Water Board staff is in the early development process for defining the project scopes for these two General Orders. Please refer to the Introductory Fact Sheet for preliminary information on this project.


During the development of this project, Lahontan Water Board staff welcomes any initial comments or questions. Please contact staff members TJ Middlemis-Clark ( / 530-542-5463) or Alex Spencer ( / 530-542-5488) for more information.

Other Wastewater System Treatment Related Programs

The Water Quality Control policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) was adopted by the State Water Resources Control Board in 2012. The Policy established a statewide, risk-based, tiered approach for regulation and management of OWTS, commonly known as septic systems that primarily treat domestic wastewater and employ subsurface disposal.

The State Water Resources Control Board adopted a General Order for land application of treated wastewater from small domestic wastewater and treatment systems in 2014. The General Order is applicable statewide and allows a monthly average flow rate up to 100,000 gallons per day. The Waste Discharge Requirements can be found here.