Local Agency Management Program
What is this service?
The Local Agency Management Program (LAMP) develops minimum standards for the treatment and disposal of sewage through onsite wastewater treatment systems. The LAMP is the culmination of the actions required by Assembly Bill 885 and the State Water Resources Control Board to develop regulations and standards for onsite wastewater treatment systems. The County of San Luis Obispo LAMP is designed to protect surface water and groundwater from contamination while providing flexibility in design criteria in consideration of local conditions.
The State Water Resources Control Board does not allow the County to continue the current septic system permitting after May 13, 2018.
Specifically, State Water Resources Control Board (State Water Board) Water Quality Control Policy for Siting, Design, Operation, and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) requires changes to the County's permitting authority until a LAMP is approved and adopted by the State Water Board and County Board of Supervisors.
Design Requirements for New & Replacement Septic Systems:
Until the County of San Luis Obispo Local Agency Management Program (LAMP) is approved and adopted, the County is unable to permit systems that do not meet OWTS Policy Tier 1 standards. Tier 1 standards include provisions for siting, design, and operation of septic systems.
The County has created a summary of the Updated Criteria for Onsite Wastewater Treatment Systems
The complete Tier 1 standards are contained within the State OWTS Policy.
Systems that do not meet all of the Tier 1 standards must pursue permitting through the Central Coast Water Board.
Additional information is available at the California Central Coast Water Board site.
Subdivision Parcel Size Requirements:
Tier 1 standards also include requirements for minimum subdivision parcel size for parcels served by septic systems. The County of San Luis Obispo has developed a Countywide Rainfall Coverage Map to assist applicants with determining the minimum parcel size in their area.
Applicants wishing to utilize a different data source for determination of average annual precipitation, or a variance on minimum parcel size must request authorization from the Central Coast Water Board.
The Local Agency Management Program (LAMP) is the culmination of the actions required by Assembly Bill 885 (AB 885) which directed the State Water Resources Control Board (SWRCB) to develop regulations or standards for onsite wastewater treatment systems (Septic Treatment Systems) to be implemented by qualified local agencies. The SWRCB adopted the Water Quality Control Policy for Siting, Design, Operation, and Maintenance of Onsite Wastewater Treatment Systems on June 19, 2012 (OWTS Policy). The OWTS Policy allows local agencies, such as the County of San Luis Obispo, to permit and approve Septic Treatment Systems, based on a local ordinance, after approval of a LAMP by the Central Coast Regional Water Quality Control Board (Central Coast Water Board).
The County of San Luis Obispo LAMP is designed to protect groundwater sources and surface water bodies from contamination through the proper design, placement, installation, maintenance, and assessment of individual Septic Treatment Systems.
The LAMP develops minimum standards for the treatment and ultimate disposal of sewage though the use of Septic Treatment Systems in non-sewered unincorporated areas of San Luis Obispo County. The LAMP will also expand the ability of Planning & Building to permit and regulate alternative Septic Treatment Systems while protecting water quality and public health.
Please review the downloadable LAMP FAQs for a list of the most frequently asked questions regarding the LAMP.
The Department of Planning & Building is working to update the draft LAMP for review.
The Department of Planning & Building continues to invite public comment on the Proposed Final LAMP.
To submit comments, please e-mail:
If you have any questions regarding your existing septic system or a new septic system on a vacant lot, and how the LAMP may affect your property, please contact Cheryl Journey.
LAMP Outreach Meetings
The County hosted two public outreach meetings in December 2017 to present the Proposed Final version of the LAMP.
Monday, December 18th 5:00PM- 6:30PM
San Luis Obispo County New Government Center, 1055 Monterey Street, San Luis Obispo (Room 161)
Tuesday, December 19th 5:00PM-6:30PM
Atascadero Library 6555 Capistrano, Atascadero,
(Polin Community Room)