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.

Rivers:

Samples from most rivers located in this watershed are averaged as part of these data summaries.

Season	Total Nitrogen	Nitrate (NO3)	Total Phosphorus	Orthophosphate	Number of Sample Stations	Number of Samples
OCT-DEC 2023	1,212 ug/l		210 ug/l		1	1
JUL-SEP 2023	1,028 ug/l		279 ug/l		4	7
APR-JUN 2023	953 ug/l		201 ug/l		3	7
JAN-MAR 2023	865 ug/l		265 ug/l		7	14
OCT-DEC 2022	1,242 ug/l		438 ug/l		21	43
JUL-SEP 2022	1,297 ug/l		420 ug/l		19	45
APR-JUN 2022	1,366 ug/l		233 ug/l		20	44
JAN-MAR 2022	883 ug/l		235 ug/l		22	51
OCT-DEC 2021	1,199 ug/l		305 ug/l	0.2 mg/l	20	45
JUL-SEP 2021	1,434 ug/l		362 ug/l		21	49
APR-JUN 2021	986 ug/l		259 ug/l		22	53
JAN-MAR 2021	888 ug/l		249 ug/l		23	57
Five Year Seasonal Graph	Graph		Graph	Graph
Five Year Graph of All Samples	Graph		Graph	Graph

Source(s): Charlotte Harbor Estuaries Volunteer Water Quality Monitoring Network, FDEP Historic Data from Legacy STORET, Sarasota County Historic Data from Legacy STORET, Sarasota County Coastal Creeks, Sarasota County Environmental Services Department Sampling Data, FDEP Charlotte Harbor Aquatic/Buffer Preserves Sampling Data, FDEP South District Sampling Data, FDEP Watershed Monitoring Section, Manatee County Environmental Management Sampling Data, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), USGS National Water Information System, FDEP - Charlotte Harbor Aquatic Preserves, FDEP - South Regional Operations Center, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Southwest Florida Water Management District, FDEP - Southwest Regional Operations Center, FDEP - Watershed Assessment Section

Lakes:

Samples from most lakes located in this watershed are averaged as part of these data summaries.

Season	Total Nitrogen	Nitrate (NO3)	Total Phosphorus	Orthophosphate	Number of Sample Stations	Number of Samples
JUL-SEP 2023	1,206 ug/l		440 ug/l		2	2
APR-JUN 2023	1,897 ug/l		255 ug/l		2	4
JAN-MAR 2023	1,051 ug/l		203 ug/l		5	8
OCT-DEC 2022	1,065 ug/l		389 ug/l		5	13
JUL-SEP 2022	1,015 ug/l		452 ug/l		5	9
APR-JUN 2022	863 ug/l		235 ug/l		3	9
JAN-MAR 2022	1,023 ug/l		226 ug/l		5	11
OCT-DEC 2021	1,263 ug/l		350 ug/l		4	4
JUL-SEP 2021	1,674 ug/l		1,026 ug/l		4	4
APR-JUN 2021	999 ug/l		276 ug/l		4	11
JAN-MAR 2021	1,047 ug/l		329 ug/l		3	6
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, FDEP South District Sampling Data, FDEP Watershed Monitoring Section, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), USGS National Water Information System, FDEP - South Regional Operations Center, Florida LAKEWATCH

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.

Source: SWFWMD Hydrologic Data Section Data

River	Flows Whole River Range	Flows Data by Segment	Levels Whole River Range	Levels Data By Segment
Big Slough	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Deer Prairie Slough	In the past 30 days NO DATA Recent river flow data is unavailable.	No data table or graph available	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph
Howard Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Cocoplum Waterway	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph
Myakka River	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Coker Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph
Long Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph
Maple Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph
Ogleby Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph
Taylor Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are the same as they have been historically.	Levels Data Table and Graph

Source(s): Not Available

Source(s): Not Available