Rancho Cucamonga, CA Environmental Rules: Erosion Control (2026)

Erosion and sediment control in Rancho Cucamonga is regulated through Municipal Code Title 19 (Grading) and Chapter 19.08 (Stormwater), which require erosion control plans for any grading project disturbing 50 cubic yards or more of earth, or any project within the hillside management overlay area. Plans must be prepared by a qualified civil engineer or erosion control specialist and include a combination of Best Management Practices (BMPs) including silt fencing, fiber rolls, hydroseeding, straw mulch, check dams, sediment basins, and stabilized construction entrances. The California rainy season officially runs October 1 through April 30, and all construction sites must have functional erosion controls in place by October 1 regardless of construction status. Hillside projects along the Alta Loma foothills face additional requirements under the Hillside Development Regulations due to steep slopes and alluvial fan conditions. Failure to maintain erosion controls during storm events can result in stop-work orders, citations starting at 500 dollars, and liability for sediment damage to neighboring properties or waterways.