The hydrologic data collection program of the St. Johns River Water Management District collects, processes, manages and disseminates hydrologic and meteorological data that are used for consumptive use permitting, water shortage management, establishment of minimum flows and levels, water supply planning and management, environmental protection and restoration projects, and operation of district flood control facilities. The program is staffed and managed by the Bureau of Water Resource Information.
The bureau operates and maintains 1,600 monitoring stations throughout the district and processes data from approximately 200 additional sites collected by federal agencies, other districts and local governments, or by the U.S. Geological Survey under contract to the district. More than 16 million measurements are collected, verified, processed and stored each year. These data are disseminated to district staff and are made available on this page.
Data is retrieved from several sources, including but not limited to, federal, state, county and municipal agencies and other water management districts. In no event will the district or the contributing agencies be liable for any direct, indirect, incidental, special, consequential or other damages, including loss of profit, arising from the use of these data, even if the district has been advised of the possibility of such damages.
Rainfall figures are defined as follows:
- Daily is the daily mean and is the prior day’s rainfall. (Example: rainfall listed on a Tuesday is the rainfall from Monday.)
- Monthly is a rolling 30-day average through the prior day.
- Annual is a rolling 365-day average.
Rainfall amounts come from the district’s network of rain gauges and may not necessarily reflect rainfall for a specific location.
If you have questions concerning these data, you should contact the Bureau of Water Resource Information at 386-643-1991, the district at 800-451‑7106 or by email at firstname.lastname@example.org.
Information for developers
SJRWMD provides web services for its hydrologic data through secure.sjrwmd.com/hydweb/cgi/webservice.exe. Web services are tools for transmitting data between two different computer systems. Further documentation can be found at kisters.com.au/webservices.html.
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).
About springs discharge data
The St. Johns River Water Management District develops stage discharge ratings for springs from graphical analysis of current-meter discharge measurements from various monitoring stations on varying schedules and made over a range of stages and discharges. Shifts in measurements can be short- or long-term and can be caused by changes in the streambed, vegetation growth, backwater conditions and other variables. Archived data provided are shift corrected, incorporating the mathematical adjustments for rating. The shift adjustments are applied to the individual ratings as measured data becomes available, resulting in an adjusted rating. Flow data posted as part of the springs stage discharges page is provisional and subject to change.
Green Cove Springs
Silver Glen Springs
Blue Cypress Lake
Orange Lake Boardman