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 |
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APR-JUN 2022 | 505 ug/l |
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274 ug/l | 0.25 mg/l | 8 | 8 |
JAN-MAR 2022 | 798 ug/l |
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263 ug/l | 0.35 mg/l | 25 | 46 |
OCT-DEC 2021 | 945 ug/l | 345.0 ug/l | 301 ug/l | 0.28 mg/l | 30 | 52 |
JUL-SEP 2021 | 1,080 ug/l |
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355 ug/l | 0.33 mg/l | 26 | 54 |
APR-JUN 2021 | 1,006 ug/l |
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289 ug/l | 0.26 mg/l | 31 | 53 |
JAN-MAR 2021 | 1,029 ug/l |
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278 ug/l | 0.25 mg/l | 29 | 53 |
OCT-DEC 2020 | 1,061 ug/l |
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271 ug/l | 0.27 mg/l | 27 | 45 |
JUL-SEP 2020 | 939 ug/l |
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460 ug/l | 0.34 mg/l | 22 | 39 |
APR-JUN 2020 | 973 ug/l |
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438 ug/l | 0.4 mg/l | 24 | 30 |
JAN-MAR 2020 | 988 ug/l |
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276 ug/l | 0.16 mg/l | 15 | 35 |
Five Year Seasonal Graph |
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Five Year Graph of All Samples |
Season | Total Nitrogen | Nitrate (NO3) | Total Phosphorus | Orthophosphate | Number of Sample Stations | Number of Samples |
---|---|---|---|---|---|---|
JAN-MAR 2022 | 1,073 ug/l |
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65 ug/l |
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3 | 3 |
OCT-DEC 2021 | 1,243 ug/l |
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43 ug/l |
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4 | 4 |
JUL-SEP 2021 | 988 ug/l |
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87 ug/l |
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6 | 12 |
APR-JUN 2021 | 1,209 ug/l |
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108 ug/l |
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11 | 22 |
JAN-MAR 2021 | 1,943 ug/l |
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157 ug/l |
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14 | 33 |
OCT-DEC 2020 | 1,749 ug/l |
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136 ug/l |
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11 | 11 |
APR-JUN 2020 | 1,232 ug/l |
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10 ug/l |
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5 | 5 |
JAN-MAR 2020 | 1,529 ug/l |
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76 ug/l |
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9 | 14 |
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 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 |
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Little Manatee River - South Fork |
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Sawgrass Lake East Outfall Canal |
NO DATA Recent river flow data is unavailable. |
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Source(s): Not Available
Source(s): Not Available