Compost Producers in California: Test Healthy Soil and Compost

Compost Producers in California: Test Healthy Soil and Compost

Why use high-quality compost? Compost provides many benefits to soil, including:
  • Increases water retention and infiltration rate
  • Improves nutrient levels and balances
  • Promotes good soil structure and deeper root growth
  • Adds/attracts beneficial organisms
  • Sequesters carbon and builds resiliency to climate change
Navigating Compost Approval Programs
There are three main vetting programs  for compost producers, as seen below:
  1. US Compost Council – A nationwide non-profit that aims to advance compost manufacturing, compost utilization, and organics recycling to benefit its members, society, and the environment.
  2. Association of Compost Producers – California state chapter of the US Compost Council (overlaps with USCC). 
  3. CalRecycle - Conducts compost and mulch outreach in California in association with SB 1383. Approved vendors here are eligible for reimbursement through Zero Foodprint.


US Compost Council Members
  1. Agromin OC Oceanside Green Materials Address: 1400 Wilshire Rd, Fallbrook, CA, 92028 Phone: (805) 485-9200
  2. Agromin-Bowles Green Material Composting Address: 13000 Carlucci Rd, Dos Palos, CA, 93620 Phone: (805) 485-9200
  3. Agromin Organics Recycling Address: 6859 Arnold Rd, Oxnard, CA, 93033-8701 Phone: (805) 485-9200
  4. Limoneira/Agromin Ag. Composting Operation Address: 12390 W Telegraph Rd, Santa Paula, CA, 93060-9748 Phone: (805) 485-9200
  5. Aguinaga Green, Inc - Silverado Location Address: 27910 Baker Canyon Rd, Silverado, CA, 92676-9704 Phone: (714) 649-9050
  6. Burrtec Waste Industries - West Valley MRF Address: 13373 Napa St, Fontana, CA, 92335-2930 Phone: (909) 899-0911
  7. Burrtec Waste Industries - Agua Mansa MRF Address: 1830 Agua Mansa Rd, Jurupa Valley, CA, 92509-2404 Phone: (951) 786-0544
  8. Burrtec Waste Industries - Victor Valley Compost Address: 17000 Abbey Ln, Victorville, CA, 92394-1604 Phone: (760) 241-1284
  9. Cal Poly State University - Cal Poly Compost Address: 1 Grand Ave, San Luis Obispo, CA, 93407-9000 Phone: (805) 459-3345
  10. CR&R, Inc. - Rancho Mission Viejo Compost Facility Address: 31641 Ortega Highway, San Juan Capistrano, CA, 92675 Phone: (714) 826-9049
  11. Diestel Turkey Ranch - Triple J Farms Address: 10330 La Grange Rd., Jamestown, CA, 95327-1234 Phone: (209) 532-4950
  12. Engel & Gray, Inc. - Engel & Gray, Inc., Regional Compost Facility Address: 745 W Betteravia Rd, Santa Maria, CA, 93455-1247 Phone: (805) 925-2771
  13. FCC Environmental - Western Placer Waste Management Authority Address: 3033 Fiddyment Rd, Roseville, CA, 95747-9705 Phone: (530) 925-6991
  14. Inland Empire Regional Composting Authority - Inland Empire Regional Composting Facility Address: 12645 6th St, Rancho Cucamonga, CA, 91739-9223 Phone: (909) 993-1500
  15. Keith Day Company, Inc. dba: Gabilan Ag Services - Gabilan Ag Services Address: Po Box 1670, 14201 DEL MONTE BLVD, Marina, CA, 93933 Phone: (831) 771-0126
  16. Kochergen Farms Composting, Inc - Kochergen Farms Composting, Inc Address: 33915 Avenal Cutoff Rd, Kettleman City, CA, 93239-9715 Phone: (559) 498-0900
  17. Las Virgenes Municipal Water District - Rancho Las Virgenes Composting Facility Address: 3700 Las Virgenes Rd, Calabasas, CA, 91302-2951 Phone: (818) 251-2330
  18. Napa Recycling & Waste Services - Northern Recycling Compost - Yolo Address: 44090 County Road 28h, Woodland, CA, 95776-9101 Phone: (707) 255-5200
  19. Napa Recycling & Waste Services - Napa Materials Diversion Facility (Napa Recycling & Composting Facility) Address: 820 Levitin Way, American Canyon, CA, 94503-5107 Phone: (707) 255-5200
  20. Organic Recycling Inc. - Plant's Choice, Inc. Address: 1700 Maxwell Rd, Chula Vista, CA, 91911-6156 Phone: (619) 585-9909
  21. QuackenBush Resource Recovery and Compost Facility - QuackenBush Compost Address: 16520 Davis Avenue, Clearlake, CA, 95422 Phone: (707) 200-9317 x217
  22. R&S Soil Products, Inc - R&S Soil Products, Inc Address: 23615 El Toro Rd # X336, Lake Forest, CA, 92630-4707 Phone: (949) 830-8882 x229
  23. Recology Organics - Jepson Prairie Organics Address: 6426 Hay Rd, Vacaville, CA, 95687-9457 Phone: (707) 678-4718
  24. Recology Organics - Blossom Valley Organics - South Address: 6061 N Wheeler Ridge Rd., Lamont, CA, 93241 Phone: (661) 845-4056
  25. Recology Organics - Recology Blossom Valley Organics Address: 3909 Gaffery Rd, Tracy, CA, 95304 Phone: (707) 249-1338
  26. Recology Organics - South Valley Organics Address: 3675 Pacheco Pass Rd, Gilroy, CA, 95020-9534 Phone: (408) 847-4142
  27. Recology Organics - Ostrom Organics Address: 5900 Ostrom Rd, Wheatland, CA, 95692-9458 Phone: (707) 249-1338
  28. Recycled Wood Products/RWP Landscape Materials - RWP Landscape Materials Address: 5365 Walnut Ave, Chino, CA, 91710-2622 Phone: (909) 868-6882 x229
  29. Republic Services - International Disposal Corp of CA, Inc. - Newby Island Compost Facility Address: 1601 Dixon Landing Rd, Milpitas, CA, 95035-8100 Phone: (408) 586-2314
  30. Republic Services - West Contra Costa Sanitary Landfill Compost Facility Address: 1 Parr Blvd, Richmond, CA, 94801-1007 Phone: (510) 970-7243
  31. Republic Services - Forward Inc Address: 9999 S Austin Rd, Manteca, CA, 95336-8924 Phone: (760) 272-1224
  32. SA Organics Recycling - SA Recycling Thousand Palms Address: 29250 Rio Del Sol, Thousand Palms, CA, 92276-2603 Phone: (760) 702-1090
  33. San Pasqual Valley Soils - San Pasqual Valley Soils Address: 16111 Old Milky Way, Escondido, CA, 92027-7102 Phone: (760) 429-4041
  34. Synagro - Nursery Products Address: 14479 Cougar Rd, Helendale, CA, 92342 Phone: (760) 265-5210
  35. Synagro - Central Valley Compost Facility Address: 13757 Harmon Rd, Dos Palos, CA, 93620-9560 Phone: (209) 725-2828
  36. Synagro - South Kern Compost Manufacturing Facility Address: 2653 Santiago Rd, Taft, CA, 93268-3607 Phone: (661) 765-2200
  37. Terra Bella Nursery, Inc. - Terra Bella Nursery, Inc. Address: 302 Hollister St, San Diego, CA, 92154-4700 Phone: (619) 585-1118
  38. Vision Recycling - Vision Benicia Address: 1460 Goodyear Rd, Benicia, CA, 94510-1209 Phone: (510) 429-1300
  39. Vision Recycling - Vision Livermore Address: 30 Greenville Rd, Livermore, CA, 94551-5804 Phone: (510) 429-1300
  40. WM Organics, LLC - WM Central Valley Compost Facility Address: 916 Frewert Rd, Lathrop, CA, 95330-9731 Phone: (209) 982-1381
  41. WM Organics, LLC - WM South Valley Compost Facility Address: 24487 Road 140, Tulare, CA, 93274-9160 Phone: (559) 753-0040
  42. WM Organics, LLC - WM Altamont Compost Facility Address: 10840 Altamont Pass Rd, Livermore, CA, 94551-9722 Phone: (209) 982-1381
  43. WM Organics, LLC - WM EarthCare of Marin Address: 8950 Redwood Hwy, Novato, CA, 94945-1435 Phone: (415) 408-9055
  44. Zanker Road Resource Management - Z-best Composting Address: 980 State Highway 25, Gilroy, CA, 95020-8080 Phone: (408) 846-1346
Association of Compost Producers Members
North Grab N' Grow Soil Products
  • Location: Santa Rosa, CA 95407
  • Phone: 707-795-1775
North Kellogg Garden Products
  • Locations: Bay/Sac Throughout Northern California and the Bay Area
  • Website:
  • Note: Available at all major garden centers
Republic Services - Bay/Sac 1
  • Location: Milpitas, CA 95035
  • Phone: 408-687-1928
Republic Services - Bay/Sac 2
  • Location: Richmond, CA 94801
  • Phone: 510-262-7531
Republic Services - Bay/Sac 3
  • Location: Manteca, CA 95336
  • Phone: 209-982-4298
Vision Recycling - Bay/Sac 1
  • Location: Fremont, CA 94538
Vision Recycling - Bay/Sac 2
  • Location: Benecia, CA 94510
Engel & Gray, Inc. - CCoast
  • Location: Santa Maria, CA 93456
  • Phone: 805-925-2771
Central Kellogg Garden Products
  • Locations: Central Throughout Central California
  • Website:
  • Note: Available at all major garden centers
Liberty Compost - Central
  • Location: Lost Hills, CA 93249
  • Phone: 661-797-2914
Synagro - Central 1
  • Location: Taft, CA 93268
  • Phone: 661-765-2200
Synagro - Central 2
  • Location: El Nido, CA 95317
  • Phone: 209-725-2828
Tulare Lake Compost - Central
  • Location: Kettleman City, CA 93239
  • Phone: 559-840-4368
Aguinaga Green, Inc. - OC/IE
  • Location: Silverado, CA 92676
  • Phone: 714-649-9050
Beneficial Ag Services - OC/IE
  • Location: Ontario, CA 91761
  • Phone: 909-930-0200
Burrtec Waste Industries, Inc. - OC/IE
  • Location: Fontana, CA 92335
  • Phone: 909-899-0911
Burrtec Waste Industries, Inc. - OC/IE
  • Location: Riverside, CA 92509
Burrtec Waste Industries, Inc. - OC/IE
  • Location: Coachella, CA 92236
Inland Empire Regional Composting Authority - OC/IE
  • Location: Rancho Cucamonga, CA 91739
  • Phone: 909-993-1981
Kellogg Garden Products - OC/IE
  • Locations: LA Throughout Los Angeles, Inland Empire, and San Diego, California
  • Website:
  • Note: Available at all major garden centers
San Pasqual Valley Soils - SD/IC
  • Location: Escondido, CA 92027-7105
  • Phone: 760-429-4041
Synagro - OC/IE
  • Location: Helendale, CA 92342
  • Phone: 760-265-5210
Republic Services - SD/IC
  • Location: Chula Vista, CA, 91911
  • Phone: 619-562-0415

CalRecycle Approved Producers
Composting Facility (Altamont Landfill)
Old Durham Wood Inc.
WCCSLF Organic Materials Processing
Pacific Wood Recycling
Gallo Vineyards, Inc Compost Facility
Green Valley Recycling
MidValley Disposal Transfer Recycling St
Compost Solutions, Inc.
Salton City Compost
Main Base Sanitary Landfill, Edwards AFB
Liberty Composting Inc.
Recology Blossom Valley Organics- South
Mt Vernon Ave Recycling & Composting Fac
South Kern Industrial Center Compost Facility
YES California
Kochergen Farms Composting
Tulare Lake Compost
South Lake Resource Recovery and Compost
Pebbly Beach (Avalon) Disposal Site
Griffith Park Composting Facility
Van Norman Chipping and Grinding Fac
North Hills Recycling, Inc.
American Reclamation Chipping and Grinding
WM Earthcare of Marin
Mariposa Co. Composting Facility
Cold Creek Compost, Inc.
Pacific Organic Solutions
El Nido Composting Facility-Synagro West
Johnson Canyon Sanitary Landfill
Monterey Peninsula Landfill
Gabilan Ag Services
Converted Organics of California, LLC
AgroThrive, Inc.
Clover Flat Resource Recovery Park
Upper Valley Disposal Service
City of Napa Material Diversion Facility
Rainbow Transfer/Recycling Company, Inc.
CVT Regional Material Recovery and TS
La Pata Avenue Greenwaste Facility
Tierra Verde Industries EcoCentre
Stanton Green Materials Recycling Facility
Capistrano Greenery
Bee Canyon Greenery
Western Placer Waste Mgmt Authority MRF
Perris Transfer Station and MRF
Robert A Nelson Transfer Station & MRF
Robert A Nelson Transfer Station & MRF
Coachella Valley Compost
Edom Hill Transfer Station
SA Recycling
Lamb Canyon Compost Facility
Edom Hill Compost
Waste Management Recycle America, LLC
Lopez Ag Service, Inc.
Victorville Sanitary Landfill
Barstow Sanitary Landfill
Mid-Valley Sanitary Landfill
Landers Sanitary Landfill
San Timoteo Sanitary Landfill
Heaps Peak Transfer Station
One Stop Landscape Supply Center
Advance Disposal Center for the Environm
West Valley Materials Recovery Facility
Victor Valley MRF & Transfer Station
Victor Valley Regional Composting Facility
Big Bear Transfer Station
Nursery Products Hawes Composting Facility
Otay Landfill
Sycamore Landfill
El Corazon Compost Facility
Inland Pacific R.R. Slaughterhouse Yard
Inland Pacific Resource Recovery LLC
Otay Landfill Composting Operation
Otay Mesa Compost Facility
Miramar Greenery
Forward Resource Recovery Facility
Tracy Material Recovery & T.S.
Clean Planet, Inc.
Central Valley Compost
B. Goodrow, Inc. Composting
South Coast Recycling & Transfer Station
Tajiguas Res Rec Proj & Sanitary LF
Tajiguas Res Rec Proj & Sanitary LF
Engel & Gray Inc
Santa Ynez Valley Recycling & Trans Stat
MarBorg C&D Recycling & Transfer Facility
Health Sanitation Services, Inc.
Z-Best Composting Facility
South Valley Organic Composting Facility
Zanker Road Resource Recovery Operation
Newby Island Compost Facility
City of Santa Cruz Resource Recovery Facility
Buena Vista Drive Sanitary Landfill
City Of Redding Transfer Station/MRF
Jepson Prairie Organics Composting Fac
Potrero Hills Compost Facility
Goodyear Road Compost Facility
Atlas Tree Recycling Facility
Recology Blossom Valley Organics N Hamme
Gilton Resource Recovery Composting Fac.
Modesto Co-Compost Facility
Recology Blossom Valley Organics North (Vernalis)
South Valley Compost Site
WC Wood Industries Company Composting Facility
Pena's Disposal Inc Transfer & MRF
City of Porterville Solid Waste Transfer
Simi Valley Landfill & Recycling Center
Agromin Limoneira Commercial Organics Processing Ops.
Yolo County Central Landfill
Yolo County Central Landfill
Northern Recycling Compost - Zamora
Pacific Wood Recycling Chipping Grinding
Recology Ostrom Organics

Important Notes
In no event shall Alluvial Soil Lab be liable for any direct, indirect, punitive, incidental, special, or consequential damages arising out of, or in any way connected with, the use of products or services listed in this document.
Feel free to contact us with any questions regarding this document at (831) 216-1367.
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Understanding Soil Health

Assessing soil health involves looking at physical, chemical, and biological components.

Soil health is a fundamental concept that underpins the success of agriculture, gardening, and land management practices. It refers to the overall well-being and vitality of the soil ecosystem, encompassing physical, chemical, and biological aspects. Understanding soil health is crucial for maintaining sustainable and productive landscapes while also contributing to environmental conservation.

  1. Physical
    The physical properties of soil play a critical role in its health. These properties include soil texture, structure, compaction, and water-holding capacity. Soil texture refers to the proportions of sand, silt, and clay particles in the soil. A balanced texture allows for adequate water drainage and retention, preventing waterlogging and drought stress. Soil structure influences root penetration, aeration, and nutrient movement. Healthy soil structure promotes a friable and well-drained medium for plant growth.
  2. Chemical
    Soil chemistry directly affects nutrient availability and plant growth. Key chemical factors include soil pH, nutrient content, and the presence of contaminants. Soil pH measures the soil's acidity or alkalinity and profoundly influences nutrient uptake by plants. Nutrient content, including macronutrients like nitrogen, phosphorus, and potassium, must be in balance to support healthy plant growth. Monitoring and maintaining proper nutrient levels through fertilization are essential for maximizing crop yields and preventing nutrient deficiencies.
  3. Biological
    The biological component of soil health pertains to the diverse array of microorganisms, insects, and other organisms that inhabit the soil ecosystem. These organisms play crucial roles in nutrient cycling, organic matter decomposition, and disease suppression. Soil microorganisms break down organic matter, releasing nutrients that are subsequently made available to plants. A rich and diverse soil microbiome contributes to enhanced nutrient availability and plant resilience against diseases.

Our Soil Tests

We provide a range of soil tests from basic chemistry, to texture/infiltration rate, all the way to biology.

Order a Soil Test Kit

Basic Soil Health Test

The Basic Soil Health Test is an excellent starting point for understanding your soil's condition. It offers a comprehensive analysis encompassing pH levels, nutrient content, CEC (Cation Exchange Capacity), salts, and organic matter. This budget-friendly test is ideal for identifying potential soil health issues and establishing a solid foundation for further management.

Full Chemistry Test

Our Full Chemistry Test provides a detailed assessment of your soil's quality, guiding you towards healthy and sustainable soil management practices. Through an extensive analysis, we examine macro and micronutrient levels, pH, CEC, organic matter, and salinity. This comprehensive understanding empowers us to create tailored recommendations for soil amendments and treatments, optimized for the specific plants you intend to cultivate. By optimizing your soil's chemistry, you can expect to foster more robust and vibrant plant growth.

Complete Soil Health Test

Uncover a deeper understanding of your soil's health with the Complete Soil Health Test. This comprehensive analysis goes beyond the basics, measuring nutritional factors and examining soil texture. It covers macro and micronutrients, organic matter, pH, CEC, as well as sand, silt, and clay percentages. Additionally, we assess carbon sequestration levels, providing you with a holistic view of your soil's composition. The personalized recommendations derived from this test empower you to make precise adjustments to enhance your soil's health and productivity.

MWELO Soil Management Report

For those navigating California's MWELO guidelines, our MWELO Soil Management Report is an indispensable resource. This report not only ensures compliance but also promotes sustainable and thriving landscapes. It includes comprehensive data such as soil texture, infiltration rate, pH, total soluble salts, sodium content, and organic matter percentage. With amendment recommendations, optionally tailored to specific plant types, and annual maintenance tips, you'll be equipped to create landscapes that are both aesthetically pleasing and environmentally responsible.

Heavy Metals

The Heavy Metals analysis is a vital tool in assessing potential soil contamination. Given the uncertain history of properties, this analysis identifies the presence of heavy metals that might have accumulated due to past activities or nearby industrial sources. With results available in approximately nine business days, you'll gain insights to ensure the safety and health of your soil.

Soil Food Web

Explore the intricate world beneath the surface with our Soil Food Web analysis. By estimating population sizes of essential trophic groups—bacteria, fungi, protozoa, and nematodes—we unveil the microbiological health of your soil. Additionally, we identify specific organisms within these groups, providing insights into the soil's successional level and overall condition. This analysis is applicable to soil, compost, and compost tea samples, offering a holistic perspective on your soil's biological vitality.

Pesticide Screening

The Pesticide Screening can detect hundreds on common pesticides that may have been applied or drifted from nearby sources.

Herbicide Screening

The Herbicide Screening plays an important role in ensuring the safety of your soil and plants. By detecting the presence of herbicide residues, this test can indicated whether a soil has had history of herbicide applications.

See our other tests.

Regenerative Soil Management Practices

Working with nature to improve soil means implementing practices like cover cropping, mulching, and composting.

Cover Cropping

Cover cropping involves planting specific crops during non-growing seasons to cover and protect the soil. These crops enhance soil structure, prevent erosion, suppress weeds, and provide organic matter when incorporated into the soil. Leguminous cover crops also contribute nitrogen fixation, enriching soil fertility naturally. Cover cropping is a sustainable method that improves soil health and biodiversity.


Mulching entails covering the soil surface with organic materials like straw, leaves, or wood chips. Mulch conserves soil moisture, moderates temperature fluctuations, suppresses weeds, and prevents soil erosion. As the mulch breaks down, it contributes organic matter, enriching the soil's structure and fertility. Mulching is an effective and easy way to maintain soil health.


Composting transforms organic waste into nutrient-rich compost. Incorporating compost into the soil enhances its structure, moisture retention, and fertility. Compost also introduces beneficial microorganisms that aid in nutrient cycling and disease suppression. Composting not only reduces waste but also revitalizes soil, making it an essential component of sustainable gardening.

Water Conservation Techniques

Implementing water-efficient practices such as drip irrigation, rainwater harvesting, and utilizing drought-resistant plants minimizes water use and reduces soil erosion. Conserving water in landscapes maintains soil moisture, supports plant growth, and sustains overall soil health. Water conservation techniques are vital for responsible gardening in arid and water-scarce regions.

If you have any questions feel free to get in touch with the Alluvial Soil Lab team at (831) 216-1367 or at

This page was written with the help of AI.

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