Environmental Rules in Rancho Cucamonga, CA (2026)
5 verified environmental rules for Rancho Cucamonga, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Rancho Cucamonga bans discharging anything but clean stormwater into its municipal separate storm sewer system unless a state NPDES permit or a specific chapter exception applies. Municipal Code Section 19.20.080 lists 23 prohibited discharge types, from pool backwash to construction slurry, enforced by the city engineer under Chapter 19.20.
Rancho Cucamonga Stormwater Discharge Rules
Significant RestrictionsRancho Cucamonga, CA, Municipal Code § 19.20.080 (Prohibited Discharges)
It is prohibited to: A. Discharge directly or indirectly to the city's MS4, or any street, line or unlined drainage channel which leads to the city's MS4, any non-stormwater or other solid, liquid or gaseous water, unless such discharge is authorized by either a separate NPDES permit or as otherwise specified in section 19.20.100. If such discharge is permitted by a NPDES permit, or is generall...
Erosion Control
Rancho Cucamonga requires every grading permit holder to actively prevent erosion, flooding, and mud or debris deposition onto adjacent property throughout construction. The duty applies regardless of lot size and runs for the full length of the grading operation, per Municipal Code Section 15.12.140.
Rancho Cucamonga Erosion Control During Grading
Some RestrictionsRancho Cucamonga Municipal Code § 15.12.140 (Section J110.3 of Appendix J)
Section J110.3 is hereby added to read as follows: J110.3 Temporary erosion control during grading work. The permittee shall put into effect and maintain all precautionary measures necessary to protect adjacent watercourses and public or private property from damage by erosion, flooding, and deposition of mud or debris origination from the site during the grading operation regardless of lot size.
Flood Zones
Anyone building, filling, or altering land within a mapped area of special flood hazard in Rancho Cucamonga needs a development permit first. Municipal Code Section 19.12.040 requires the permit before construction begins, and the city engineer, acting as floodplain administrator, reviews the application against the adopted FEMA flood maps.
Rancho Cucamonga Floodplain Development Permit
Some RestrictionsRancho Cucamonga, CA, Municipal Code § 19.12.040(A) (Floodplain Development Permit)
A. Establishment of development permit. A development permit shall be obtained before any construction or other development begins within any area of special flood hazard established in section 19.12.030(B). Application for a development permit shall be made on forms furnished by the floodplain administrator and may include, but not be limited to: plans in duplicate drawn to scale showing the n...
Defensible Space
Every property owner in Rancho Cucamonga must clear fire hazard vegetation from their land under Municipal Code Chapter 8.46, and undeveloped parcels that are more than half chaparral must remove all vegetation within 50 feet of any structure and 30 feet of property lines and roads, keeping grass no taller than four inches.
Rancho Cucamonga Defensible Space Rules
Significant RestrictionsRancho Cucamonga, CA, Municipal Code Sec. 8.46.040(B) (Means of Abatement)
Abatement for undeveloped parcels where the combustible vegetation is more than 50 percent chaparral can be accomplished by the removal of all vegetation that is within 50 feet of any structure, including structures on adjacent parcels; removal of all vegetation to a distance of 30 feet from property lines and adjacent roads; removal of all dead and dying tree and plant material and noxious wee...
Flood Elevation Requirements
New and substantially improved homes in Rancho Cucamonga's flood zones must have their lowest floor, including any basement, built at least two feet above the base flood elevation. Municipal Code Section 19.12.050(A)(3)(a) sets that two-foot freeboard for standard zones, with a different rule for shallow-flooding AO zones.
Rancho Cucamonga Flood Elevation Freeboard Rule
Some RestrictionsRancho Cucamonga, CA, Municipal Code § 19.12.050(A)(3)(a) (Elevation and Floodproofing)
a. Residential construction, new or substantial improvement, shall have the lowest floor, including basement: i. In an AO zone, elevated above the highest adjacent grade to a height exceeding the depth number specified in feet on the FIRM by at least two feet, or elevated at least four feet above the highest adjacent grade if no depth number is specified; ii. In an A zone, the lowest floor elev...
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