Biosolids & Recyled Water Committee

Biosolids are the nutrient-rich organic by-product of domestic wastewater treatment. When properly treated and managed, biosolids are a sustainable, low-carbon fertilizer and soil amendment. The Biosolids & Recycled Water Committee focuses on promoting environmentally sound biosolids and recycled water use, along with sharing technical information and best practices.

Land application of biosolids is a cost-effective and sustainable option for managing biosolids. Proper testing and management standards are set and enforced by the Oregon Department of Environmental Quality (DEQ) to ensure proper management. Best Management Practices for land application of biosolids include:

  • Testing and limitations for metals, potassium, nitrogen and phosphorus,
  • Use of agronomic loading rates,
  • Restrictions on site access for an appropriate time after application,
  • Planting and grazing restrictions,
  • Setbacks for surface and groundwater protection, and
  • Proper seasonal timing of biosolids application.

ACWA has produced a Biosolids Fact Sheet for use by its members and others in discussing biosolids and biosolids land application in Oregon.

Regulatory Oversight

Biosolids testing, quality, and management standards are set by the US Environmental Protection Agency (EPA) and the Oregon DEQ. In Oregon, operates the regulatory oversight program for both EPA and DEQ.

More information about DEQ’s regulations and additional technical resources are available on the Oregon DEQ website.

Standards for the treatment, testing, and environmentally-sound use of recycled water are also set by Oregon DEQ. Learn more about DEQ’s recycled water program.




Biosolids and Recycled Water Committee resources include:

Biosolids and recycled water grow poplar trees near Eugene/Springfield, Oregon.

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