Stormwater at Your Construction Site
Stormwater pollution is caused when rainwater runs off of disturbed areas, stockpiles, or storage yards and picks up pollutants such as sediment, oils, or chemicals from leaks or spills. These pollutants are transported into the storm sewers and directly into our lakes, streams, and the ocean.
Most people are surprised to learn that stormwater is a leading cause of water pollution across the country. Most stormwater is NOT treated before it enters the creeks or ocean; whatever material the water collects as it runs off is transported directly to our creeks or ocean.
There are many simple ways that construction sites in San Luis Obispo County can help prevent stormwater pollution. For more information check out the Resources and Frequently Asked Questions and Answers below.
Resources
| Stormwater Requirements for New Construction |
| Post-Construction Stormwater Management |
| Stormwater Dry Well or Infiltrator Registration |
FAQs
The 2019 County Public Improvement Standards include a seed mix adapted for final stabilization county-wide. The County Standard Seed Mix includes low height, low fire risk native plants and grasses. Alternative blends may be proposed for approval during the project permitting process. For short-term or temporary erosion control a native grass blend is recommended.
The requirements for erosion and sediment control plans are detailed on the erosion and sediment control plan checklist.
Irrigated agricultural operations are regulated separately by the Central Coast Regional Water Quality Control Board through the Irrigated Lands Regulatory Program. Agricultural operations are subject to many different requirements than construction operations.
Correction notices are commonly issued for sediment track-out, poor waste management, and poor erosion control. Review the Construction Stormwater BMPs poster (prints are available by request, email [email protected]).
Planning and Building responds to complaints, questions, and comments regarding potential pollution from active construction sites. Planning and Building can be contacted by phone (805) 781-5600.
If you’re unsure about the source of pollution, check out the Pollution Prevention and Response Page
