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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OCT-DEC 2023 |
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38 ug/l |
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1 | 1 |
JUL-SEP 2023 | 1,250 ug/l |
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83 ug/l |
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2 | 4 |
APR-JUN 2023 | 1,205 ug/l |
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64 ug/l | 0.04 mg/l | 4 | 8 |
JAN-MAR 2023 | 1,349 ug/l |
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69 ug/l | 0.04 mg/l | 4 | 11 |
OCT-DEC 2022 | 1,426 ug/l |
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160 ug/l | 0.13 mg/l | 3 | 8 |
JUL-SEP 2022 | 1,180 ug/l |
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58 ug/l | 0.03 mg/l | 4 | 11 |
APR-JUN 2022 | 1,282 ug/l |
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68 ug/l | 0.04 mg/l | 4 | 11 |
JAN-MAR 2022 | 1,238 ug/l |
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48 ug/l | 0.03 mg/l | 4 | 11 |
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 |
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Five Year Seasonal Graph |
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Five Year Graph of All Samples |
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Stream level and flow data for the Saint Johns 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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Saint Johns River |
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Source(s): Not Available
Source(s): Not Available