Recently-promulgated rules developed by the St. Johns River Water Management District necessitate monitoring at facilities within the Lake Apopka (Florida) hydrologic basin. These rules require monitoring total discharge from the site, periodic discharge sampling for total phosphorus, measurement of rainfall at the site, and the calculation of annual phosphorus loading. HSA Golden designed an automated stormwater monitoring system customized to meet the District's requirements. Monitoring parameters are recorded using a data logger; data are collected periodically in the field using a personal digital assistant (PDA). District personnel have indicated that HSA Golden is the first consulting firm to perform Apopka Rule monitoring and reporting activities.