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 |
---|---|---|---|---|---|---|
JUL-SEP 2024 | 1,178 ug/l |
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331 ug/l |
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13 | 15 |
APR-JUN 2024 | 976 ug/l |
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337 ug/l |
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22 | 28 |
JAN-MAR 2024 | 1,217 ug/l |
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259 ug/l |
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26 | 37 |
OCT-DEC 2023 | 788 ug/l |
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366 ug/l |
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17 | 32 |
JUL-SEP 2023 | 957 ug/l |
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368 ug/l |
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24 | 53 |
APR-JUN 2023 | 1,016 ug/l |
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303 ug/l |
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24 | 62 |
JAN-MAR 2023 | 786 ug/l |
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273 ug/l |
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23 | 62 |
Five Year Seasonal Graph |
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Five Year Graph of All Samples |
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Season | Total Nitrogen | Nitrate (NO3) | Total Phosphorus | Orthophosphate | Number of Sample Stations | Number of Samples |
---|---|---|---|---|---|---|
JUL-SEP 2024 | 1,285 ug/l |
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454 ug/l |
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1 | 1 |
APR-JUN 2024 | 1,296 ug/l |
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199 ug/l |
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2 | 3 |
JAN-MAR 2024 | 1,075 ug/l |
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228 ug/l |
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2 | 3 |
OCT-DEC 2023 | 1,135 ug/l |
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278 ug/l |
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2 | 4 |
JUL-SEP 2023 | 1,102 ug/l |
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291 ug/l |
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2 | 5 |
APR-JUN 2023 | 824 ug/l |
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185 ug/l |
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2 | 6 |
JAN-MAR 2023 | 1,021 ug/l |
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173 ug/l |
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2 | 6 |
Five Year Seasonal Graph |
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Five Year Graph of All Samples |
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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 Manatee River 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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Gamble Creek |
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Upper Manatee River |
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Braden River |
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Source(s): Not Available
Source(s): Not Available