The overall health of Chesapeake Bay improved in 2014, according to scientists at the University of Maryland Center for Environmental Science, with significantly improving trends in both total nitrogen and total phosphorus in the Bay. Overall, the tidal waters of the Chesapeake scored a C (50%), which was up from the previous year’s score of 45% (also a C). The 2014 overall score of 50%, a C, is considered moderate health.