Erosion Control: Chino vs Hesperia
How do erosion control rules compare between Chino, CA and Hesperia, CA?
Chino has fewer restrictions than Hesperia.
Chino, CA
San Bernardino County
Construction sites in Chino must implement erosion and sediment control Best Management Practices (BMPs) under the San Bernardino MS4 Permit (Order R8-2010-0036), California Building Code Appendix J (grading), and — for sites disturbing 1 acre or more — the statewide Construction General Permit (Order 2022-0057-DWQ). BMPs must keep sediment, concrete slurry, and construction debris out of Chino's storm drains and creeks year-round, with intensified controls during the October 1 – April 30 wet season.
View full Chino rules →Hesperia, CA
San Bernardino County
Hesperia's SWMP requires Erosion and Sediment Control Plans (ESCPs) for construction sites, including single-family residences, to prevent sediment discharge into the Mojave River watershed. Projects disturbing one acre or more must enroll under the statewide Construction General Permit (Order 2022-0057-DWQ) via the State Water Board's SMARTS system and prepare a SWPPP signed by a Qualified SWPPP Developer. Standard BMPs include silt fences, fiber rolls, stabilized construction entrances, soil stockpile covers, and post-construction revegetation.
View full Hesperia rules →Key Facts Comparison
| Fact | Chino | Hesperia |
|---|---|---|
| Local trigger | Grading permit (CBC Appendix J) for any project moving 50+ cubic yards or disturbing 5,000+ sq ft | - |
| State trigger | 1 acre disturbance = Construction General Permit + SWPPP | - |
| Wet season | October 1 – April 30 (heightened BMP requirements) | - |
| Slope ratio | Cuts/fills no steeper than 2:1 horizontal:vertical without engineered design | - |
| Penalty ceiling | $10,000/day under Cal. Water Code §13385 | - |
| CGP trigger | - | ≥1 acre of soil disturbance (Order 2022-0057-DWQ) |
| Local rule | - | Hesperia SWMP — ESCP required even for single-family residential construction |
| Required roles | - | Qualified SWPPP Developer (QSD) + Qualified SWPPP Practitioner (QSP) |
| Receiving water | - | Mojave River watershed (Lahontan Region) |
Highlighted rows indicate differences between cities.
Chino FAQ
Do I need a SWPPP for a single-family house?
Only if the project disturbs 1 acre or more of soil. Smaller lots still need erosion control BMPs (silt fence, inlet protection, stabilized entrance) per Chino's grading permit, but the state SWPPP is not required.
What are wet-season grading restrictions in Chino?
From October 1 through April 30, Chino requires enhanced BMPs — covered stockpiles, perimeter controls in place before rain events, and limits on the area of bare soil. Construction General Permit sites must conduct pre-storm, storm, and post-storm inspections.
Can I wash out a concrete truck on my Chino lot?
Only into a designated, lined concrete washout containment — never on bare soil, gutter, or storm drain. Concrete washwater (high pH) is an illicit discharge enforceable by the Santa Ana Water Board.
Who issues grading permits in Chino?
Chino Building & Safety / Engineering issues grading permits under Title 15 (California Building Code Appendix J as adopted). Phone (909) 334-3253.
Hesperia FAQ
Do I need a SWPPP for a 0.5-acre site in Hesperia?
No — the statewide Construction General Permit threshold is 1 acre of soil disturbance. However, Hesperia's SWMP requires an Erosion and Sediment Control Plan (ESCP) with BMPs (silt fences, stabilized entrance, sediment controls) for smaller sites, including single-family residential builds. Check with the Engineering Department.
What BMPs are typically required?
Stabilized construction entrance to prevent track-out, silt fence or fiber rolls along perimeter, soil stockpile covers, concrete washout containment, inlet protection for storm drains, and post-construction soil stabilization (revegetation, hydroseed, or rock cover) — per the city's SWMP construction handouts.
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