Senate Bill (SB) 1383 regulations require jurisdictions to annually procure organic waste products such as compost, mulch, renewable gas, or electricity from biomass, according to targets that are calculated based on population of the jurisdiction.

To help meet SB 1383 requirements and to stimulate market demand for recovered organic materials like compost, the San Luis Obispo County IWMA is excited to offer our Compost Rebate Program. We provide a $10 per ton rebate on eligible purchases of compost made from recovered organic waste product locally.

Purchasers, please review the program overview below before form submittal, and reach out to compost@iwma.com or call the IWMA at (805) 782-8530 if you have any questions.

Effective 01/13/2025, we have reached our allotment for 2024 rebates, and are unable to issue rebate for purchases made in 2024. Purchases made in 2025 are welcome!

How does the Compost Rebate Program work?

 Step 1:   Review the complete Program Terms and Conditions, and sign a Compost Rebate Agreement Application online via Docusign. Agreement must be signed by purchaser and approved by the IWMA prior to redeeming compost purchased through the program. Be sure to attach W-9 to Application Agreement. Alternatively, applicants can print and complete form, and email scanned copy to compost@iwma.com.

This process is for new participants in the program, effective 08/27/2025. 

Compost Rebate Agreement Application (Docusign)

Step 2:   After your Rebate Application Agreement has been approved, purchase between 20 and 3,000 tons of compost from an approved facility. 

Step 3:   Complete the Rebate Request Form online via Docusign. Please be sure to attach Proof of Purchase, such as a weight ticket or invoice, that shows the name of the compost facility, date of transaction, and the weight (in tons) of compost purchased. Alternatively, applicants can print and complete form, and email scanned copy to compost@iwma.com

Compost Rebate Request Form (Docusign)

Program Overview

• The Compost Rebate Program is available to businesses and residents in San Luis Obispo County that purchase compost from an approved facility.
• Rebate is available for purchases totaling at least 20 tons and up to 3,000 tons purchased throughout the fiscal year. Purchasers may make multiple separate purchases throughout the calendar year and submit together to reach 20 ton threshold.
• Compost must be purchased from an approved facility. The approved facilities are:
  • Buckeye Processing & MRF, Paso Robles
  • Creston Organic Compost (B. Goodrow), Creston
  • Engel & Gray Inc., Santa Maria
  • Keith Day Co., Salinas
  • Kompogas (Kanadevia Inova), San Luis Obispo
  • Kochergen Farms Compost, Avenal
• Proof of Purchase must show the name of the compost facility, the date of the transaction, and the weight (tons) of compost that was purchased.
• A copy of most recent W-9 is required for rebate. W-9 is only required to be submitted once, prior to program participation, or when W-9 information changes.
• Rebate is to be claimed only for the price of the compost, not transportation or spreading.

If you have any questions, please contact the IWMA at (805) 782-8530 or compost@iwma.com.