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 2022 | 1,103 ug/l |
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385 ug/l |
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1 | 2 |
APR-JUN 2022 | 871 ug/l |
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334 ug/l |
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21 | 47 |
JAN-MAR 2022 | 738 ug/l |
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251 ug/l |
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19 | 52 |
OCT-DEC 2021 | 1,045 ug/l |
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308 ug/l |
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22 | 53 |
JUL-SEP 2021 | 1,103 ug/l |
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317 ug/l |
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25 | 55 |
APR-JUN 2021 | 747 ug/l |
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331 ug/l |
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22 | 27 |
JAN-MAR 2021 | 786 ug/l |
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233 ug/l |
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23 | 64 |
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 |
---|---|---|---|---|---|---|
APR-JUN 2022 | 783 ug/l |
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178 ug/l |
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2 | 6 |
JAN-MAR 2022 | 792 ug/l |
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180 ug/l |
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2 | 6 |
OCT-DEC 2021 | 983 ug/l |
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155 ug/l |
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5 | 9 |
JUL-SEP 2021 | 1,058 ug/l |
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226 ug/l |
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5 | 8 |
APR-JUN 2021 | 932 ug/l |
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193 ug/l |
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6 | 6 |
JAN-MAR 2021 | 800 ug/l |
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191 ug/l |
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2 | 6 |
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 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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Braden River |
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Gamble Creek |
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Upper Manatee River |
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Source(s): Not Available
Source(s): Not Available