Explore general as well as scientific information about the movement, chemistry and biology of area surface and ground water environments.
The following data are summarized as seasonal average values for lake and river sampling locations located within the watershed. While these data are useful to serve as a general picture of watershed health, these data must be viewed with caution because these samples have been taken from ecologically different water resources.
Season | Total Nitrogen | Nitrate (NO3) | Total Phosphorus | Orthophosphate | Number of Sample Stations | Number of Samples |
---|---|---|---|---|---|---|
JAN-MAR 2024 | 1,174 ug/l | 259 ug/l | 0.14 mg/l | 24 | 40 | |
OCT-DEC 2023 | 1,320 ug/l | 391 ug/l | 0.25 mg/l | 23 | 42 | |
JUL-SEP 2023 | 1,104 ug/l | 364 ug/l | 0.33 mg/l | 16 | 34 | |
APR-JUN 2023 | 1,218 ug/l | 424 ug/l | 0.45 mg/l | 27 | 54 | |
JAN-MAR 2023 | 1,001 ug/l | 278 ug/l | 0.27 mg/l | 30 | 53 | |
OCT-DEC 2022 | 1,199 ug/l | 263 ug/l | 0.29 mg/l | 31 | 61 | |
JUL-SEP 2022 | 1,185 ug/l | 283 ug/l | 0.36 mg/l | 28 | 46 | |
APR-JUN 2022 | 989 ug/l | 302 ug/l | 0.29 mg/l | 31 | 62 | |
JAN-MAR 2022 | 778 ug/l | 251 ug/l | 0.35 mg/l | 25 | 51 | |
Five Year Seasonal Graph | ||||||
Five Year Graph of All Samples |
Season | Total Nitrogen | Nitrate (NO3) | Total Phosphorus | Orthophosphate | Number of Sample Stations | Number of Samples |
---|---|---|---|---|---|---|
JUL-SEP 2023 | 549 ug/l | 58 ug/l | 3 | 7 | ||
APR-JUN 2023 | 564 ug/l | 107 ug/l | 3 | 5 | ||
JAN-MAR 2023 | 1,226 ug/l | 97 ug/l | 8 | 16 | ||
OCT-DEC 2022 | 1,049 ug/l | 66 ug/l | 10 | 18 | ||
JUL-SEP 2022 | 1,348 ug/l | 69 ug/l | 10 | 19 | ||
APR-JUN 2022 | 1,207 ug/l | 83 ug/l | 10 | 14 | ||
JAN-MAR 2022 | 1,295 ug/l | 91 ug/l | 5 | 11 | ||
Five Year Seasonal Graph | ||||||
Five Year Graph of All Samples |
Southwest Florida Water Management District calculates the Aquifer Resource Indicator (ARI) for their three groundwater regions each month. The ARI was created to provide the public with a gauge of groundwater levels in their area, so they can develop an understanding of the severity and cycles of drought and recovery. The three regions include: North (Citrus, Hernando, Lake, Levy, Marion, and Sumter counties), Central (Hillsborough, Pasco, Pinellas, and Polk counties), and South (Charlotte, DeSoto, Hardee, Highlands, Manatee, and Sarasota counties). Learn More about the Aquifer Resource Indicator >>
To determine the ARI for a region, each well is compared weekly to its respective low-normal value and the difference is calculated. The weekly differences are reduced to a monthly value for all monitoring wells within a region, and the resulting ARI value represents how far water levels in the aquifer must rise or fall to reach their respective low-normal values.
Stream level and flow data for the Middle Tampa Bay Watershed. Learn More about Stream Flow »
River | Flows Whole River Range | Flows Data by Segment | Levels Whole River Range | Levels Data By Segment |
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Little Manatee River |
Average river flow is slower than it has been historically. |
Average water levels are higher than they have been historically. |
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Little Manatee River - South Fork |
Average river flow is faster than it has been historically. |
Average water levels are higher than they have been historically. |
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Sawgrass Lake East Outfall Canal |
NO DATA Recent river flow data is unavailable. |
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Average water levels are lower than they have been historically. |
Source(s): Not Available
Source(s): Not Available