Online tools, GIS, data
Controlled water levels
Controlled water level information for selected areas of the Upper St. Johns River and Upper Ocklawaha River basins is accessible via the links below.
To comply with federal mandates and to ensure consistency with other state and local governments, the District is in the process of converting how it measures and reports elevation data. The former system, known as “mean sea level,” is officially known as the National Geodetic Vertical Datum of 1929 (NGVD 29). The new system is known as the North American Vertical Datum of 1988 (NAVD 88). For details on the conversion efforts, visit our vertical datum project page.
Controlled water level reports
Updated daily at noon.
