Weeki Wachee Springs Spring Dashboard
Historical Average Rainfall
for June: 7.72
Actual Rainfall Received
for June: 4.78 in
Springshed Region Rainfall
This graph displays the moving 12-month rainfall total as measured within the Weeki Wachee Springs springshed since 1995. The area between the red and green lines is the expected normal range (between the 25th and 75th percentiles) of rainfall.
Weeki Wachee River Stream Flow:
98 mgd (5/1/2018)
This number is the most recent average daily estimate of how much water flows down the Weeki Wachee River and is measured in million gallons per day (mgd). Nearly all of the river's stream flow is from groundwater flowing out of the Weeki Wachee headsprings and other springs discharging into the river. For reference, one million gallons is enough water to fill about 100 residential swimming pools!
This graph displays the moving 12-month average of daily Weeki Wachee River stream flow since 1995. The area between the red and green lines is the expected normal range (between the 25th and 75th percentiles) of stream flow.
0.85 mg/L (4/17/2017)
This number is the most recently measured nitrate value in milligrams per liter (mg/L) from the Weeki Wachee Spring vent. Excess levels of nitrate in water can be harmful to aquatic insects, amphibians and fish. If algae have an unlimited source of nitrate, excess growth may occur. Large amounts of algae growth can cause reduced water clarity and extreme fluctuations in dissolved oxygen, which is stressful to aquatic life.
This graph displays the levels of nitrate over time from the Weeki Wachee Spring vent since 1995. The red line on the graph shows the statewide numeric nutrient criteria for nitrate levels in springs, which is 0.35 milligrams per liter (mg/L). Excess levels of nitrate in water can be harmful to aquatic insects, amphibians and fish. If algae have an unlimited source of nitrate, excess growth may occur. Large amounts of algae growth can cause reduced water clarity and extreme fluctuations in dissolved oxygen, which is stressful to aquatic life.
Underwater view of Weeki Wachee River looking upriver within Weeki Wachee Springs State Park. (Inset: State of Florida counties and Weeki Wachee Springshed location.)
Weeki Wachee Springs, Hernando County
This map links to an interactive overview of the Weeki Wachee Springs springshed. When you zoom in on the Weeki Wachee River, the map also shows data collection sites associated with the information presented in the dashboard.
Clarity at Headsprings:
99 feet (1/10/2018)
Clarity at Downriver Site:
31 feet (1/10/2018)
These two numbers represent the clarity of the water (how far you can see under water), in feet, in the Weeki Wachee Springs headspring and also at a location downstream in the Weeki Wachee River. These measurements show how water clarity changes as you move further from the headsprings down the river. Based on these water clarity values, Weeki Wachee Springs has very clear water, ranking it with the clearest fresh waters found on Earth (Davis-Colley and Smith, Optically pure spring water, New Zealand Journal of Marine and Freshwater Research, 1995, Vol. 29; 251-256).
Springshed Water Use
These graphs for water use show the estimations of annual water use by type within the Weeki Wachee Springs springshed. These data include the percent of estimated water use for Hernando and Pasco counties within the springshed. The data represent both metered and estimated water use as reported in annual Estimated Water Use Reports.
This pie chart represents the estimated sources and percentages of manmade nitrate contributions to Weeki Wachee Springs based on the main land use types in the Weeki Wachee Springs springshed. Nitrate loading to groundwater can be from organic (septic tanks, livestock, sewage disposal) or inorganic (fertilizer) sources. The data are from the FDEP NSILT September 2016 draft report.
Interactive Land Use Map
This map links to an interactive map of land use within the Weeki Wachee Springs springshed. The urban and disturbed category contains classifications such as residential, industrial and transportation. The natural areas category contains classifications including upland forested and nonforested areas, as well as wetlands. The main dashboard page displays a fade of both 1995 and 2009 land use. The interactive map initially displays 1995 land use, but allows for cycling through of the years 1995, 1999, 2004 and 2009 by use of the "Time" button and slider.