Oysters can provide many environmental benefits, including water filtration, habitat for wild fish, and a source of sustainable local seafood. Oysters contain nitrogen and phosphorus in their tissue and shell, and harvest of farmed oysters can reduce excess nutrients in the coastal environment. Our team is developing an online calculator for eastern oyster aquaculture that predicts nitrogen removal at harvest for farms from North Carolina to Maine. We would like to add phosphorus to this tool, but phosphate data is currently only available from Maryland and Virginia.   Additional samples from farms located in Connecticut, Rhode Island, Massachusetts, and New Hampshire are being collected, and this project will involve sample processing to create a regional dataset for use in the online tool.