Hydrologic Data

Historical Groundwater and Surface Water Levels, Rainfall and Evapotranspiration Data

Last-Recorded Value App »
Find the most recent water level or rainfall value for data collection sites.

Rainfall Data by Region »
Monthly, yearly and seasonal average rainfall totals available by time period and selected geographic area from 1915 to present. Data are updated monthly.

The Water Management Information System (WMIS) is the District’s official database of groundwater and surface water levels, flows, water quality and atmospheric data such as rainfall, wind direction and temperature. The WMIS also provides monitoring site details including the location, well construction and geology from where the information is collected. The portfolio search tool looks for groups of related data-collection sites, linked permits, and associated site photos, maps and reports. Data are updated nightly.

Resource Data Search »

PLEASE NOTE: The way to access data will be changing in the coming months. The Resource Data module of WMIS will be replaced with a more modern Environmental Data Portal. To receive email updates about these changes, sign up here.

Find data for wells, raingauges, springs, rivers, streams, lakes, canals and estuaries.

Portfolio Search »
Find groups of related monitor sites, linked permits, and associated site photos, maps and reports.

Assistance with the WMIS
Contact the WMIS Help Desk at (352) 754-3456 Monday–Friday between 8 a.m. and 5 p.m. or email the WMIS Help Desk.

Near Real-Time Groundwater and Surface Water Levels and Rainfall

Near-Real-Time App »
Find current water levels and rainfall from our near-real-time system.


The District regularly monitors rainfall, aquifer conditions and structure operations throughout the region. The most up-to-date information is reflected in routine reports.

Daily Hydrologic Data
Monthly Lake Wales Ridge Lake-Level Update

Work Plans, Performance Metrics & Standard Operating Procedures

The weekly report provides the status of the District’s structures and water levels.

Hydrologic Conditions Report »
The Hydrologic Conditions Report is generated monthly and provides a summary of regional variations in hydrologic conditions for planning and regulatory purposes.

Aquifer Resource Weekly Updates »
The weekly report provides information to the public about the health of the water resources including rainfall values and aquifer levels.

Water Resource Monthly Updates »
The monthly report provides information to the public about the health of the water resources including rainfall values and aquifer and surface water levels.

Monthly Rainfall Maps and Weekly River Flow Charts »
A comparison of recent rainfall and river flows to statistical averages. The data includes one-, two- and three-year rainfall accumulation maps and river flow graphs for the last year and last 10 years. Rainfall maps are updated monthly and river flows are updated weekly.

Map Book: Upper Floridan Aquifer Potentiometric Surface - This SWFWMD map series consists of a 24” x 36” PDF map for each May and September beginning in September 2011.

Other Hydrologic Data Sources

In addition to the District’s hydrologic monitoring data, the following are links to other sources of hydrologic information.

USGS Investigative Report – Creating a monthly time series of the potentiometric surface in the Upper Floridan aquifer, Northern Tampa Bay area, Florida, January 2000-December 2009 »
Long-term groundwater monitoring data were used to generate a monthly time series of potentiometric surfaces in the Upper Floridan aquifer over a 573-square-mile area of west-central Florida between January 2000 and December 2009. The mapping time series describes the potentiometric surface beneath parts of six regionally important stream watersheds and 11 municipal well fields that collectively withdraw about 90 million gallons per day from the Upper Floridan aquifer. Includes links to an animation and GIS downloads for the modeled results.

Tampa Bay Water 2017 – Extending the monthly time series of the potentiometric surface in the Upper Floridan Aquifer, Northern Tampa Bay area, Florida, January 1990-December 2015 »
Long-term groundwater monitoring data were used to extend the available monthly-average potentiometric surface maps of the Upper Floridan in the Northern Tampa Bay area to a 26-year period from January 1990 to December 2015. The methods and mapped area are those used by Lee and Fouad (2014) in USGS Investigative Report 2014-5038 to create a 10-year time series. The extended mapping results seamlessly describe 26 years of potentiometric-surface elevations in the years before, during, and after large reductions in groundwater withdrawals from the area’s municipal well fields. Data products include monitoring-well characteristics, times series of groundwater-levels in each of the 195 monitoring wells, and GIS downloads for modeled results. Download full .zip archive (325mb) »

Changes in Wetland Groundwater Conditions in the Northern Tampa Bay Area from 1990 to 2015 »
The Wetland Groundwater Conditions project maps monthly groundwater conditions at 10,516 wetlands in the Northern Tampa Bay area from January 1990 to December 2015. The groundwater condition metric is the vertical elevation difference (in feet) between the potentiometric surface in the Upper Floridan aquifer and the land surface of the wetland. Positive values, when the aquifer potentiometric surface is above the wetland land surface, convey discharging groundwater conditions. Negative values, when the potentiometric surface falls below land surface, convey recharging groundwater conditions. Wetlands are in a 581-square-mile area where the aquifer potentiometric surface is affected by groundwater pumping from 11 municipal well fields.  Download full .zip archive (69.1mb) »

USGS Groundwater, Surface Water (Flow and Level) and Water Quality Data » 
The U.S. Geological Survey currently operates more than 550 data collection sites in Florida for acquiring information on surface water, groundwater, water quality, and precipitation. Many sites are equipped with satellite telemetry, which allows the data to be posted to the website for public dissemination. Data are updated at frequencies ranging from 15 minutes to daily.

National Oceanic and Atmospheric Administration (NOAA) Climate Data Center »
The NOAA Climate Data Center is the world’s largest active archive of weather data. The climate data center produces numerous climate publications and responds to data requests from all over the world. Data is updated at varying schedules.

National Weather Service Forecast Office — Tampa Bay Area » 
The NWS office in Ruskin, FL, provides a resource for short-term climate forecasts, flooding warnings and regional climate data archives.

USGS Water Watch » 
The U. S. Geological Survey’s Water Watch presents statistical evaluations of hydrologic data in a historical context that supports drought and flood monitoring.

Southeast River Forecast Center »
The Southeast River Forecast Center provides statistical evaluations of near real-time rainfall and streamflow to assist in flood monitoring and prediction. Additional climate analysis and forecast products are also available.

U.S. Drought Portal »
The National Integrated Drought Information System is a summary of national and local drought conditions and forecasts.