**AWARDS ISSUED PRIOR TO JANUARY 20, 2025, WERE FUNDED UNDER PREVIOUS ADMINISTRATIONS AND MAY NOT REFLECT THE PRIORITIES AND POLICIES OF THE CURRENT ADMINISTRATION.** ORGANIC SYSTEMS HAVE DEVELOPED VALUE BASED ON IMPROVED SUSTAINABILITY. THE ORGANIC DAIRY INDUSTRY HAS SUSTAINED GROWTH REPRESENTING A SIGNIFICANT PORTION OF ALL US ORGANIC INVESTMENTS. FOR STAKEHOLDERS TO MAKE INFORMED DECISIONS THAT IMPACT INDUSTRY GROWTH, THERE IS NEED FOR ASSESSMENT AND QUANTIFICATION OF THE ENVIRONMENTAL FOOTPRINT OF ORGANIC DAIRY SYSTEMS. THIS PROJECT PROPOSES TO DEVELOP EIGHT LIFE CYCLE ASSESSMENT REGIONAL MODELS FOR ORGANIC DAIRY SYSTEMS IN THE US. OUTPUTS WILL PROVIDE BASELINE FARM LEVEL ENVIRONMENTAL IMPACT DATA ON GLOBAL WARMING POTENTIAL (GREENHOUSE GAS EMISSIONS), EUTROPHICATION POTENTIAL (NUTRIENT LOSSES), AMMONIA EMISSIONS, AND RESOURCE DEPLETION (ENERGY, WATER, AND LAND USE) FOR NUMEROUS FARM TYPES ACROSS THE EIGHT REGIONS. MODELS WILL BE USED TO EVALUATE POTENTIAL MITIGATION STRATEGIES TO INFORM STAKEHOLDERS OF PRACTICES WITH HIGH ENVIRONMENTAL MITIGATION POTENTIAL AND RECOMMEND THOSE STRATEGIES FOR TARGETED OUTCOMES (I.E., EMISSIONS REDUCTIONS STRATEGIES). RESEARCHERS WILL ALSO EXPLORE CRITICAL MODELING ASSUMPTIONS THAT SIGNIFICANTLY IMPACT ENVIRONMENTAL OUTCOMES OF ORGANIC DAIRY SYSTEMS INCLUDING SELECTION OF ENTERIC METHANE PREDICTIVE EQUATIONS, ALLOCATION STRATEGIES, AND METHODS USED TO QUANTIFY THE GLOBAL WARMING POTENTIAL OF METHANE. THE OUTCOMES FROM THIS OBJECTIVE WILL ALLOW RESEARCHERS MAKING RECOMMENDATIONS FOR METHODOLOGICAL STANDARDIZATION AND IMPROVED COMPARISONS BETWEEN STUDIES. PROJECT OUTPUT WILL BE USED TO INFORM STAKEHOLDERS OF PATHWAYS TO IMPROVE ENVIRONMENTAL SUSTAINABILITY THROUGH EXTENSION AND OUTREACH CHANNELS AS WELL AS A CRITICAL RELATIONSHIP WITH ORGANIC VALLEY. THIS WORK ADDRESSES PRIORITY TWO OF THE ORGANIC TRANSITION PROGRAM BY DEVELOPING MODELS TO DOCUMENT ECOSYSTEMS SERVICES FROM ORGANIC DAIRY WITH EMPHASIS ON CLIMATE CHANGE MITIGATION PATHWAYS OF INTEGRATED LIVESTOCK-CROPPING SYSTEMS.