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
JUL-SEP 2023	1,411 ug/l		508 ug/l		1	2
APR-JUN 2023	907 ug/l		303 ug/l		1	3
JAN-MAR 2023	788 ug/l		309 ug/l		1	3
OCT-DEC 2022	1,088 ug/l		317 ug/l		3	6
JUL-SEP 2022	1,371 ug/l		770 ug/l		1	1
APR-JUN 2022	696 ug/l		270 ug/l		2	5
JAN-MAR 2022	620 ug/l		202 ug/l		2	4
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): Manatee County Environmental Management Sampling Data, FDEP - Southwest Regional Operations Center

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
Five Year Seasonal Graph
Five Year Graph of All Samples

Source(s): Not Available

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
NO DATA

Source(s): Not Available

Source(s): Not Available