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Working Groups

Working Groups

Working Groups

In Sustainable Phosphorus Alliance working groups, we partner to take action in initiatives that contribute to the mission of phosphorus sustainability. Participation in working groups is a benefit of membership. Contact us for more information on working groups.

Phosphorus Work Group Session
Phosphorus Phorum Session

Biosolids and Manure Task Force

The Biosolids and Manure Task Force undertook a comparative analysis of the federal and state regulations governing the land application of biosolids and manure in the US and plans to expand the analysis to Canada. That work yielded, GIS-P, our geographically-browsable data interface for state-by-state comparisons of regulatory regimes and contextualizing data.

Member organizations of the Sustainable Phosphorus Alliance and other invitees from industry and government contributed to the task force by providing oversight and feedback. Thank you to our Oversight Board members representing Kieser & Associates, Lystek International, Metropolitan Water Reclamation District of Greater Chicago, Mid-Atlantic Biosolids, National Association of Clean Water Agencies, National Milk Producers Federation, NEFCO, North East Biosolids & Residuals Association, Smithfield Foods, Synagro, US EPA, and Veolia.

Task Force Objectives

  • To compile and compare all state and federal regulations related to biosolids and manure land applications
  • To identify local variations in regulatory interpretations
  • To produce an online tool that facilitates study of the data, now available here

Phosphorus Field-to-Watershed (PF2W) Modeling Workshop

One of the classic environmental management dilemmas is that we often understand and evaluate systems at large scales (watersheds, sub-basins), yet management of the landscape most often occurs at the field or even sub-field scale. In the Phosphorus Field-to-Watershed (PF2W) Modeling Workshop, we brought together practitioners to discuss how to dovetail existing in-field phosphorus measurements and modeled phosphorus pools. In August 2018, scientists and members of the Sustainable Phosphorus Alliance were invited to this workshop. That event yielded three action groups who are working on identified knowledge gaps, as described in our . Updates from these groups were presented at


When and Where

  • Date: August 23-24, 2018
  • Time: Noon to noon EDT
  • Location: Columbus, OH

Below are links to PDFs of the slide decks used during the presentations at the event.