Evaluation of bacteriological and nutrient concerns in nearshore waters of a barrier island community in SW Florida

► Studied relationship between septic systems, groundwater and surface water on barrier island. ► Nitrates significantly greater in groundwater near septic systems. ► Enterococci bacteria not greater in groundwater near septic systems. ► Nitrogen greater in surface water near septic systems. ► Elevated enterococci in surface water from stormwater runoff.