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City of San Ramon Storm Drain Map

The purpose of the Stormwater Program is to efficiently utilize available assessment funding to reduce pollution of the stormwater as it enters into our creeks and the bay and to maintain public storm drain facilities. The Program's activities are managed in accordance with National Pollution Discharge Elimination System (NPDES) Permit requirements enforced by the San Francisco Regional Water Quality Control Board and include performing field inspections (storm drain system, creeks, and illicit connections), conducting educational and outreach activities (informational presentations, attending public events, and coordination of storm drain stenciling), performing storm drain cleaning, regularly sweeping streets, and implementing new development/redevelopment stormwater controls.

Program History

Urban stormwater runoff has been identified as a major source of pollutants to the waters of the United States including San Francisco Bay. 

San Ramon Creek

To address this pollution concern, the San Francisco Bay Regional Water Quality Control Board  (RWQCB) requires that Contra Costa Cities and County, the Contra Costa Clean Water Program(CCCWP) submit a joint application for a stormwater permit on an annual basis through a Municipal Regional Stormwater NPDES Permit (MRP). Permit requirements are typically updated every five years.  The current permit, MRP 3.0, was effective July 1, 2022, and should extend until 2027-28.

The City of San Ramon Stormwater Program is comprised of two components, the Countywide Program, and the San Ramon Stormwater Management Plan. The Stormwater Program is focused on storm drain and creek cleaning, street sweeping, public education, and inspection of private development construction sites. Additionally, public projects must adhere to C.3 design and green infrastructure requirements of the Permit, which means that areas adjacent to roadways must retain and/or filter stormwater runoff for pollutants via the use of bioswales, or bioretention facilities.

In 1993, the City Council of San Ramon adopted Resolution No. 93-15 authorizing the Contra Costa County Board of Supervisors to direct the Flood Control District to form a Stormwater Utility Area (SUA) for San Ramon and establish a $23 per ERU annual assessment for FY 1993/94. In addition, a maximum limit of $35 per ERU was set.

New Development

New development and significant redevelopment project site designs should minimize the area of new roofs, pavement, and other impervious surfaces. Where feasible, pervious surfaces should be implemented so stormwater runoff can percolate to the underlying soil. Stormwater runoff from impervious areas must be captured and treated before draining into the City’s stormwater system and eventually into the Bay.

In addition, project applicants must prepare plans and execute agreements to ensure that the stormwater treatment devices are operated and maintained in perpetuity.

For more information on these regulations, see the "Links" section below.


For more information on these new regulations, see the links below.

If you have any questions regarding the Clean Water Program or the new C.3 guidelines and requirements, please contact (925) 973-2670.