Hayward, CA Environmental Rules: Erosion Control (2026)
Key Facts
- Permit trigger
- 300+ cubic yards graded/filled per year
- Permit trigger
- Slope steeper than 5 to 1
- Erosion controls
- Silt fences, straw dikes, sediment basins
- Maintenance period
- October 1 to May 1 rainy season
- City intervention
- 5 days' notice, cost billed to owner
- Unpermitted grading
- Public nuisance under Sec. 10-8.45
Summary
Any grading or clearing in Hayward, whether or not it needs a permit, must follow the erosion and sediment control standards in Municipal Code Section 10-8.33(f). Measures like silt fences, straw bale dikes, sediment basins and slope planting must be maintained through the October 1 to May 1 rainy season, and the City Engineer can step in and bill the owner if controls fail.
(f)Design Standards for Erosion and Sediment Control.1.General. All grading or clearing activities shall be conducted in a manner that will minimize the potential for erosion from the site. Both temporary and permanent erosion control measures may be necessary to comply with this requirement. Erosion control measures may include, but shall not be limited to, the following.(i)Temporary and permanent planting of exposed soils;(ii)Temporary dikes and swales;(iii)Sediment basins and traps;(iv)Retention basins;(v)Temporary and permanent storm drainage piping;(vi)Temporary straw bale dikes; and(vii)Temporary silt fences...4.Maintenance. All sediment and erosion control measures shall be maintained so that they will fulfill their intended function throughout the October 1 to May 1 rainy season.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 28 Update 1 | Charter: Supplement 1).
Full Breakdown
10 for activity such as excavating or filling 300 or more cubic yards of earth in a 12-month period, grading a slope steeper than 5 to 1, changing a site's elevation by five feet or more, or diverting rainwater runoff from 15,000 square feet or larger. 32(b) requires anyone performing grading or clearing to remove loose dirt not protected by adequate erosion control and to provide anti-erosion or drainage devices, debris basins, or similar measures to protect public and private property and upstream and downstream waterways.
33(f), Design Standards for Erosion and Sediment Control, requires all grading or clearing to be designed to minimize erosion potential using temporary or permanent measures such as planting of exposed soils, temporary dikes and swales, sediment basins and traps, retention basins, temporary storm drainage piping, straw bale dikes and silt fences, designed and built to the City's Manual of Standards, with retention or sediment basins two feet deep or more enclosed by a six-foot chain-link fence topped with three strands of barbed wire. All sediment and erosion control measures must be maintained through the October 1 to May 1 rainy season.
If controls are not built or fail before a rainstorm, the City Engineer may enter the site after five days' written notice, or immediately in an emergency, and do the necessary work at the owner's or permittee's expense.
Violations & Fines
Grading or clearing without a required permit, or violating permit conditions, is declared a public nuisance under Section 10-8.45 and can be abated by the City. Hazardous slope instability or excessive erosion that threatens people or property, even from unpermitted work, is also a public nuisance, and the City Engineer can reconstruct or maintain failed erosion controls and bill the property owner or permittee for the cost of that work.
Frequently Asked Questions
Do I need a permit to grade or clear my Hayward property?
What erosion control measures does Hayward require during grading?
What happens if my erosion controls fail before a storm?
Sources & Official References
Other rules in Hayward
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Erosion Control in Nearby Cities
How other cities in Alameda County handle erosion control.