Environmental Rules in San Ramon, CA (2026)
5 verified environmental rules for San Ramon, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
San Ramon bans dumping anything but rain into its storm drains under Municipal Code Chapter XII. Non-stormwater discharges, litter, and pollutants entering the storm system are prohibited, and new development must submit a stormwater control plan meeting the Contra Costa Clean Water Program C.3 Guidebook standards before occupancy.
San Ramon Stormwater Discharge Rules
Significant RestrictionsSan Ramon Municipal Code § B6-365
a. The release of non-stormwater discharges to the city stormwater system is prohibited. b. The discharge of stormwater from premises or an activity that causes or contributes to a violation of receiving water limitations in the city's NPDES permit is prohibited.
Erosion Control
San Ramon requires an approved erosion control system on every active grading site before the October 15 to April 15 rainy season under Municipal Code C7-66. Erosion control and stormwater pollution prevention plans must reach the director by September 1 each year, and failure to install protection can trigger city-ordered emergency work billed to the owner.
San Ramon Erosion Control for Grading Sites
Some RestrictionsSan Ramon Municipal Code § C7-66
Where necessary, temporary and/or other devices such as desilting basins, check dams, riprap or other devices or methods, as approved by the director, shall be employed to control erosion and provide safety during the rainy season from October 15th to April 15th. The plan must be approved or waived by the director and all measures necessary to implement the plan in place before October 15th if ...
Flood Zones
San Ramon regulates all construction in FEMA-mapped special flood hazard areas under Municipal Code Chapter C4-IV. A development permit from the floodplain administrator is required before any building, filling, or grading begins in a mapped flood zone, and skipping it is a misdemeanor.
San Ramon Flood Hazard Area Rules
Significant RestrictionsSan Ramon Municipal Code § C4-43
The areas of special flood hazard identified by the Federal Emergency Management Agency or the Federal Insurance Administration by Letter of Map Revision (LOMR) modify Flood Insurance Rate Map (FIRM) Panel 060710 0004A dated September 27, 1985. The modification is effective as of March 5, 1990. Additionally, the scientific and engineering report entitled "Flood Insurance Study, City of San Ramo...
Vehicle Idling Restrictions
San Ramon bars delivery trucks from idling their engines while loading or unloading at a site's required off-street loading facility under Zoning Code Section D3-39(B)(10). Businesses can install an electrical hookup instead, letting a truck run its refrigeration unit or other systems without burning diesel at the dock.
San Ramon Delivery Vehicle Idling Ban
Some RestrictionsSan Ramon Municipal Code § D3-39(B)(10)
10. Air Quality. Delivery vehicles shall be prohibited from idling their engine during loading and/or unloading activities. An electrical connection system may be provided as an alternative to allow for operation of refrigeration systems or other delivery vehicle functions during loading and/or unloading activities.
Flood Elevation Requirements
New construction and substantial improvements in San Ramon's mapped flood zones must have the lowest floor at or above the base flood elevation, with a two-foot buffer in Zones AE, AH, A1-30, or AO when the FIRM lists no depth number, under Municipal Code Section C4-67.
San Ramon Base Flood Elevation Rules
Significant RestrictionsSan Ramon Municipal Code § C4-67
New construction and substantial improvement of any structure shall have the lowest floor, including basement, elevated to or above the base flood elevation... New construction and substantial improvement of any structure in Zone AE, AH, A1-30 or AO shall have the lowest floor, including basement, elevated above the base flood elevation, or at least two feet if no depth number is specified on t...
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