Erosion Control: Mountain View vs Palo Alto
How do erosion control rules compare between Mountain View, CA and Palo Alto, CA?
Mountain View and Palo Alto have similar restriction levels.
Mountain View, CA
Santa Clara County
Construction sites in Mountain View must install erosion control BMPs year-round, with enhanced measures October 1 through April 30. Sites over 1 acre need a Construction General Permit.
View full Mountain View rules →Palo Alto, CA
Santa Clara County
Palo Alto requires erosion and sediment control on construction sites under its grading ordinance and NPDES stormwater permit, with seasonal BMPs mandatory during the October-April rainy season.
View full Palo Alto rules →Key Facts Comparison
| Fact | Mountain View | Palo Alto |
|---|---|---|
| CGP threshold | 1 acre disturbed | - |
| Rainy season | October 1 - April 30 | - |
| Soil cover deadline | Before forecasted rain | - |
| SWPPP requirement | On-site documentation | - |
| Max daily fine | 10,000 dollars Clean Water Act | - |
| Permit Trigger | - | Grading above threshold |
| Large Sites | - | NPDES for 1+ acre |
| Rainy Season | - | Oct 1 - Apr 30 enhanced BMPs |
| Required BMPs | - | Silt fence, inlet protection |
| Stabilization | - | Required after grading ceases |
Highlighted rows indicate differences between cities.
Mountain View FAQ
Does my home remodel need erosion control?
Any construction site that disturbs soil must install basic BMPs like silt fences and storm drain inlet protection regardless of size. The rainy season requires additional soil stabilization.
What is a SWPPP?
A Stormwater Pollution Prevention Plan documents the BMPs, monitoring, and responsible parties for controlling sediment on a construction site. Required for any project over 1 acre.
Palo Alto FAQ
Do I need an erosion control plan for a small project?
Small residential projects below grading thresholds need basic BMPs but may not require formal plans. Any soil disturbance should use silt fences and inlet protection during rain.
What happens if soil washes off my site?
Sediment discharges trigger code enforcement and potential state water board violations with significant fines. Immediate cleanup and BMP upgrade are required.
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