Analytics & Testing

Regular Testing

The bi-product of your yard and garden waste is Turf Gold Compost. This compost is sampled and tested regularly*, as required by the Seal of Testing Assurance Program of the U.S. Composting Council (USCC). The most recent test results are available below to download.*The USCC and Metro Waste Authority make no guarantees regarding this product or its contents, quality or suitability for any use.

Recent Analytics

Understanding the Analytics

When reviewing the results above, key aspects are explained below:

  • Stability - Most uses of compost require a stable to very stable product that prevents nutrient tie up and maintains or enhances oxygen availability.
  • pH level - pH is the measure of acidity (alkalinity) or hydrogen ion activity of compost. The pH scale ranges from 0 to 14, with a pH of 7 indicating neutrality. A pH change of 1 unit means a 10-fold increase or decrease of acidity. Ideally, the compost should have a pH between 6 and 8.
  • Cucumber Test - Cucumber seeds are salt tolerant and very sensitive to ammonia and organic acid toxicity. By germinating cucumber seeds in high concentration in the compost, it measures toxic effects. Values above 80 percent are indicative of well-cured compost.