Norcal Ag Service 

Stormwater Management - The Basics

Serving all of central and northern California

We make our Bioretention soil mix with premium components of a PG&E certified washed sand and our ultra clean greenwaste compost. It is then machine blended for ultimate consistancy. Preferred BSM of Ducks Unlimited for sensative watershed filtration.

where to buy bioretention soil media

Engineered Soils, Bioswale, Bioretention Soil Media

Biotreatment Soil Media (BSM) is a critical element of the bioretention system. The BSM has a ratio of inorganic and organic materials to allow the appropriate infiltration rates for stormwater; facilitate pollutant removal through chemical, biological and physical processes; and provide a sufficient growing medium for plants. 

Call Today for delivery pricing.


​Biotreatment Soil Mix

Biotreatment | Bioretention | BioSwale

Norcal Ag Service provides biotreatment soil and class II permeable base rock for bioretention basins. (bulk by the truckload)

1.  Norcal Filter Green - BASMAA certified stormwater biofiltration soil media. 

2.  Class ll permeable rock - Caltrans Spec.

Bioretention soil media orders are delivered by end dump semi's or high side transfers when needed. Orders are processed within 24 hours of receipt.
Call us today for product pricing delivered to your location(s) (925) 822-5364


Rated #1 

Product & Service in Northern California

Norcal Ag Service is dedicated to making quality Biotreatment Soil Mix (BSM) to the specifications you need for your job.  We have extensive experience in helping organizations engineer the soils they need to meet the wide variety of specifications for these projects.
Our custom-blended Bioretention soils remove pollutants through filtration and a variety of biological and physical processes. Our soils meet Bay Area Stormwater Management Agencies (BASMA) soil specifications for  Bioretention Soil media. They also meet USDA Soil Type requirements. Tested for Storm Water Infiltration Rate.

Bioretention Basin