The Seal of Testing Assurance (STA) Program is administered by the U.S. Composting Council and provides standardized testing and reporting for compost products.

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Through the program, participating compost manufacturers submit compost samples for routine laboratory analysis. These tests evaluate important characteristics such as:

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🌱 Nutrient content

🌱 Green matter content

🌱 pH and salinity

🌱 Stability and maturity

🌱 Physical characteristics

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The result is a transparent, science-based assessment of compost quality that helps customers make informed decisions.

Not all compost is created equal.

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STA testing helps ensure that customers receive a product that has been independently evaluated for consistency and quality.

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Benefits of STA-certified compost include:

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✓ Reliable product information

✓ Consistent quality from batch to batch

✓ Independent laboratory testing

✓ Greater transparency for growers, landscapers, and homeowners

✓ Confidence in what you're putting into your soil

Our compost is produced from Maui green waste and processed at our Waikapu facility.

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By participating in the STA Program, we're committed to providing high-quality compost while helping divert green waste from the landfill and returning valuable nutrients back to local soils.