This data file contains the data used to produce the manuscript "Quantifying coastal ecosystem condition and a trophic state index with a Bayesian analytical framework" The data were obtained from the National Coastal Condition Assessment (EPA) and from monitoring programs working near Boston, MA (Massachusetts Water Resource Authority - http://mwra.com). The file also includes Rmd and JAGS code used to produce the manuscript. This dataset is associated with the following publication: Hagy III, J.D., B.J. Kreakie, M.C. Pelletier, F. Nojavan, J.A. Kiddon, and A.J. Oczkowski. Quantifying coastal ecosystem trophic state at a macroscale using a Bayesian analytical framework. ECOLOGICAL INDICATORS. Elsevier Science Ltd, New York, NY, USA, 142: 109267, (2022).