Environmental Rules in Tustin, CA (2026)
4 verified environmental rules for Tustin, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
In the City of Tustin, Section 4901 bars anyone from building or using an illicit connection to the storm drain system, or causing a prohibited discharge into it, and the violation applies whether or not the person acted negligently or on purpose.
Tustin Stormwater Discharge Prohibition
Significant RestrictionsTustin City Code § 4901
(a)No person shall:(1)Construct, maintain, operate, and/or utilize any illicit connection.(2)Cause, allow, or facilitate any prohibited discharge.(3)Act, cause, permit, or suffer any agent, employee, or independent contractor, to construct, maintain, operate, or utilize any illicit connection, or cause, allow or facilitate any prohibited discharge. ... (c)A civil or administrative violation of ...
Erosion Control
The City of Tustin bars grading over 200 cubic yards on any site between October 15 and April 15 unless an erosion control system has been filed and approved under Tustin City Code Section 8923. Property owners must retain a civil engineer to inspect erosion and sediment control devices, and desilting basins must be compacted to 90 percent relative density.
Tustin Grading Erosion & Sediment Control
Some RestrictionsTustin City Code § 8923
A.The faces of cut and fill slopes and the project site shall be prepared and maintained to control against erosion. ... C.No grading work in excess of two hundred (200) cubic yards will be allowed between October 15th and April 15th on any single grading site under permit unless an erosion control system has been filed and approved or waived in writing by the Building Official. ... I.Desilting...
Flood Zones
In the City of Tustin, no development can occur in a FEMA-mapped special flood hazard area without a development permit from the Building Official, who serves as Floodplain Administrator, and violating the floodplain chapter is a misdemeanor.
Tustin Floodplain Development Permit Rules
Significant RestrictionsTustin City Code § 9802.1
This chapter shall apply to all special flood hazard areas within the City of Tustin. The areas of special flood hazard identified by the Federal Insurance Administration (FIA) of the Federal Emergency Management Agency (FEMA) in the Flood Insurance Study dated January 3, 1997, and accompanying Flood Insurance Rate Maps (FIRMs), dated January 3, 1997, and all subsequent amendments and/or revisi...
Flood Elevation Requirements
In the City of Tustin, new construction and substantial improvements within Special Flood Hazard Areas A1-30, AE and AH must have the lowest floor, including any basement, elevated to or above the base flood elevation under Tustin City Code § 9804a. In Zone AO, the lowest floor must clear the highest adjacent grade by the depth shown on the FIRM, or at least two feet if none is shown, with a registered engineer or surveyor certifying the final elevation to the Floodplain Administrator.
Base Flood Elevation Rule in Tustin, CA
Some RestrictionsTustin City Code § 9804a
(3)Elevation and floodproofing.(a)New construction and substantial improvements within Zones A1-30, AE and AH on the City's FIRM shall have the lowest floor, including basement, elevated to or above the base flood elevation. Nonresidential structures shall meet the standards in Section 9804a(3)(c). Upon the completion of the structure the elevation of the lowest floor including basement shall b...
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