For decades, biosolids have been used safely and effectively to reduce waste, recover natural resources and improve soil conditions because they are held to exacting safety and quality standards. Biosolids are regularly monitored to ensure compliance with federal, state and local regulations. Hundreds of academic and scientific studies have shown that biosolids are a safe and responsible alternative to chemical or animal fertilizers.

  • Biosolids undergo a rigorous set of treatment processes that include physical, chemical and biological processes that assist in pathogen reduction.
  • Biosolids generally come in two types – Class A and Class B. Class A biosolids are treated to exceptional standards, have zero detectable levels of pathogens, and are used directly as compost and on home gardens, lawns and other public spaces to promote healthy soil conditions and water retention.
  • Class B biosolids are also treated to very high safety and quality standards, and are typically applied to farmland where the material is mixed with soil to help fertilize and condition the land for healthier crops.
  • EPA’s policy that promotes the beneficial use of municipal biosolids is based on years of extensive study and experience.
  • Studies show that neither contact with biosolids nor consumption of foods grown with the organic fertilizer pose a risk to human health.

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