Public Works
pw.lacounty.gov
Environmental Programs public counter located on the 3rd floor of the Annex building in Alhambra is open to the public. In order to maintain facility capacity we have implemented an online appointment system. Masks are highly recommended at all times for all visitors and staff. Click here to schedule an in person appointment or call (626) 458-3517 for questions or assistance.

For Stormwater questions or submissions, email us at sw@pw.lacounty.gov. You can also mail submissions to:

Los Angeles County Public Works
Environmental Programs Division
900 S. Fremont Ave
Alhambra, CA 91803


If you have any questions, contact the Environmental Programs Public Counter at (626) 458-3517, Monday to Thursday, 8 am to 4 pm.

Stormwater Links

Municipal NPDES Permit (Los Angeles RWQCB)
Principal Permittee: Los Angeles County Public Works Watershed Management Division
Los Angeles County Code (LACC), Title 12, Chapter 12.80
Code of Federal Regulations (CFR), Title 40, Part 122 – Federal NPDES Permit Program Regulation
US EPA Stormwater Menu of BMPs
California Stormwater Quality Association (CASQA) BMPs
Los Angeles County BMPs
Low Impact Development (LID) Manual
Industrial Activities Storm Water General Permit (IASGP)
Questions & answers from the June 29, 2005, public information meeting
Standard Industrial Classification (SIC) System
2007 Northern American Industry Classification System (2007 NAICS)
Stormwater Registration Form
Stormwater Inspection Form
Los Angeles County Stormwater Pollution Prevention
Enviro Links
Managed by the Los Angeles County Public Works, Environmental Programs Division
Toll Free Phone Number: 1(888) CLEAN LA
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