Whittier, CA Environmental Rules: Erosion Control (2026)

36 of the Whittier Municipal Code, the Stormwater and Runoff Pollution Control ordinance, splits construction sites into two tracks. 110, any site disturbing one acre or more must show the city it has obtained an NPDES construction general permit before work starts; the requirement carves out routine maintenance, agricultural disking and terracing, sites already under an individual NPDES permit, landfill construction under the industrial general permit, and combined-sewer discharges. A contractor who hits a public emergency requiring immediate work must file a brief description of the emergency activity within five days and submit the full permit registration documents within thirty days.

Permitted sites must keep a notice of intent, a waste discharge identification number, a stormwater pollution prevention plan and monitoring records on site, and retain them for at least three years after the job wraps, producing them on request from a city officer. 120 still requires an effective combination of erosion and sediment control BMPs drawn from Table 7 and Table 8 of the municipal NPDES permit, applied at the direction of the regional board, its executive officer, or Whittier's public works director. The public works director's authorized officers can inspect with consent or a warrant, collect samples, and demand monitoring reports at the property owner's expense.