The content of this page will provide guidance through the Sewer Area Study approval process for subdivisions, Conditional Use Permits (CUP), and single lots or any other project where Public Sewer System is proposed for ultimate public maintenance or to determine if the proposed development could be served and there’s enough capacity on the existing sewer system.
TYPICAL SEWER AREA STUDY
Information Lookup:
REFERENCE MATERIALS
Below are links to useful references if you have detailed questions regarding Sewer Area Study.
CONTACT US
If you have additional questions or concerns, please contact our Drainage & Sewer Section at (626) 458-4930, or email us at LDD-Sewer@pw.lacounty.gov. To discuss your project with us, you can make an appointment for an online meeting between the hours of 7:00 am and 5:00 pm, M-Th by using the following link: https://pw.lacounty.gov/landing/onlineappointments.cfm
APPLICATION
To submit your sewer area study for review, upload your report and supporting information online (link
below).
Submit my
report
Fees
You can pay the plan check review fees in person or online using e-check / credit card. After you have submitted your report for review, your plan checker will create a fee invoice where you can pay the fee online. Minimum deposit amounting to $3,000.00 will be required to start the review and additional charge may be added depending on the number of hours used by the plan checker towards the approval.
Paperless Submittals
We've been processing paperless plan review since 2013! Accordingly, you can submit all of your reports and supporting documents online at the link provided above. To see a typical list of all supporting documents that are required for obtaining Sewer Area Study approval, here is a Sewer Area study Submittal Checklist.
Submittal Procedure
Step by step on completing the application
Resubmittals will be required to address any corrections needed on the Sewer Area Study. Make sure to submit annotated response to plan checker comments on the report and correction list or your resubmittal may be rejected.
CONTACT US
If you have additional questions or concerns, please contact our Drainage & Sewer Section at (626) 458-4930, or email us at LDD-Sewer@pw.lacounty.gov. To discuss your project with us, you can make an appointment for an online meeting between the hours of 7:00 am and 5:00 pm, M-Th by using the following link: https://pw.lacounty.gov/landing/onlineappointments.cfm
REVIEW PROCESS
For each submittal, a check print showing plan check comments and a corrections list will be generated
and sent to the applicant who submitted the report. These documents will address deficiencies in the report
and inform you of supporting documents that needed in order to obtain Sewer Area Study approval. The
following links to resubmit your plans and to some documents that you should find useful during the sewer
improvement plan review:
Resubmit my
report
Sewer Area Study Correction List
Agency Approvals
Before your Sewer Area Study can be approved you may need to approach various jurisdictional agencies to obtain peak discharge Q or outlet approval depending on the boundary of the sewer shed. Lastly, Los Angeles County Sanitation District Will Serve Letter is always required as part of the approval package.
Depending on which entitlement you’re trying to get approval for, the approved sewer area study will
determine if there will be mitigation or not. You may need to submit a sewer plan as part of your
development or improvements of the existing sewers to have a better capacity. The findings on the approved
report will be the basis on proper design of the sewer system.
The approved sewer area study shall be invalidated should there be an increase in the total number of
dwelling units, an increase in the density, a change in the proposed sewer alignment, an increase in the
tributary sewershed, a change in the sewer connection points, or the adoption of a land use plan or a
revision to the current plan. A revision to the approved sewer area study may be allowed at the discretion
of the Director of Public Works. The approved sewer area study shall remain valid for two years from the
date of sewer area study approval. After this period of time, an update of the area study shall be
submitted by the applicant if determined to be warranted by Public Works.
CONTACT US
If you have additional questions or concerns, please contact our Drainage & Sewer Section at (626) 458-4930, or email us at LDD-Sewer@pw.lacounty.gov. To discuss your project with us, you can make an appointment for an online meeting between the hours of 7:00 am and 5:00 pm, M-Th by using the following link: https://pw.lacounty.gov/landing/onlineappointments.cfm