Environmental Rules in Fairfield, CA (2026)
4 verified environmental rules for Fairfield, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Fairfield bans any non-stormwater discharge into its storm drain system under City Code Section 22B.070, and Section 22B.170(B) escalates repeat violations from an infraction to a misdemeanor after a third offense in twelve months, with possible referral to the District Attorney.
Fairfield Stormwater Discharge Ban
Heavy RestrictionsFairfield City Code § 22B.070
Any non-stormwater discharges to the City storm drain system are prohibited except as provided herein.
Erosion Control
Fairfield's Grading and Erosion Control article, City Code Section 25.247, requires every grading project to protect cut and fill slopes from erosion, cap slope steepness at 2:1, and stabilize exposed soil before the October 15-April 15 rainy season. The city engineer enforces the standard through the grading permit process.
Fairfield Erosion & Sediment Control Rules
Some RestrictionsFairfield, CA Municipal Code § 25.247
(a) Slopes. The faces of cut and fill slopes shall be prepared and maintained to control against erosion. This control may consist of effective planting. If planting is required by the city engineer or as a condition of approval of the tentative map, the planting plan shall be approved by the city's architectural approval committee. The protection for the slopes shall be installed as soon as pr...
Flood Zones
Anyone building or developing land inside Fairfield's mapped special flood hazard area must get a floodplain development permit from the Director of Public Works before work begins, under Municipal Code § 8A.4.1. The application must show lot elevation, structure and fill locations and drainage, and violating the chapter is treated as a misdemeanor under § 8A.3.3.
Fairfield Floodplain Development Permit Rule
Significant RestrictionsFairfield Municipal Code § 8A.4.1
A flood plain development permit shall be obtained before construction or development begins within any area of special flood hazard established in section 8A.3.2. Application for a flood plain development permit shall be made on forms, furnished by the director of public works, and may include, but not be limited to; plans in duplicate scale showing the nature, location, dimensions, and elevat...
Flood Elevation Requirements
New construction and any 'substantial improvement' inside Fairfield's mapped flood hazard area must sit at least one foot above the base flood elevation at the lowest floor, including the basement, under Municipal Code § 8A.5.1.3. In Zone AO, the lowest floor must clear the FIRM's depth number by a foot, or three feet above the highest adjacent grade if no depth number is shown. A registered engineer or surveyor must certify the finished elevation.
Fairfield Base Flood Elevation Freeboard Rule
Some RestrictionsFairfield Municipal Code § 8A.5.1.3
New construction and substantial improvement of any structure shall have the lowest floor, including basement, elevated to at least one (1) foot above the base flood elevation. Nonresidential structures may meet the standards in section 8A.5.1.3(c). Upon completion of the structure the elevation of the lowest floor including basement shall be certified by a registered professional engineer or s...
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