This is a temporary web page for the stormwater programs of the Los Angeles County Flood Control District and the unincorporated County of Los Angeles. As separate Permittees under the Municipal Separate Storm Sewer System National Pollutant Discharge Elimination System (NPDES) Permit, often referred to as the "MS4 Permit", the LACFCD and County each implements its own stormwater program. We are currently working to create separate websites for these two programs. We appreciate your patience in the meantime.
The latest MS4 Permit was adopted by the Los Angeles Regional Water Quality Control Board on November 8, 2012, and became effective December 28, 2012. In addition to the LACFCD and County, the Permit is also issued to 84 municipalities within the County (the cities of Palmdale, Lancaster, Avalon, and Long Beach are excluded). Each Permittee is responsible for implementing its own stormwater program.
The new MS4 Permit presents major challenges including extensive monitoring requirements and the incorporation of 33 Total Maximum Daily Load regulations (learn more about TMDLs here). Complying with TMDLs will require expensive control measures during very challenging economic times.
The new MS4 Permit also represents a welcome shift in the way stormwater is regulated in the region. For the first time, a stormwater permit provides Permittees with incentives for integrated water planning. By combining water supply and water quality planning, Permittees can attract funding partners to build projects with multiple benefits. We support this new approach and look forward to working with stakeholders and partners to find, plan, and build exciting projects in the coming years. Visit our new stormwater websites for more information. In the meantime, contact us to find out what we are up to and how you can be a part of the planning process.
Finally, clean water is the shared responsibility of every resident in the County. Find out how you can help by learning more about stormwater pollution prevention and following these tips.