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
JAN-MAR 2024	1,297 ug/l		152 ug/l		4	12
OCT-DEC 2023	1,130 ug/l		87 ug/l		4	7
JUL-SEP 2023	766 ug/l		69 ug/l		4	8
APR-JUN 2023	551 ug/l		108 ug/l		4	8
JAN-MAR 2023	825 ug/l		136 ug/l		7	7
OCT-DEC 2022	971 ug/l		104 ug/l		7	14
JUL-SEP 2022	1,060 ug/l		109 ug/l		7	13
APR-JUN 2022	861 ug/l		179 ug/l		7	15
JAN-MAR 2022	731 ug/l		111 ug/l		4	8
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph	Graph	Graph

Source(s): Legacy Pinellas Water Quality Data, PINELLAS Water Quality Data, FDEP Watershed Monitoring Section, FDEP Southwest Regional Operations Center, USGS National Water Information System, City of St. Petersburg, Florida LAKEWATCH

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
JAN-MAR 2023			62 ug/l		3	6
OCT-DEC 2022			68 ug/l		3	6
JUL-SEP 2022			55 ug/l		3	6
APR-JUN 2022			44 ug/l		3	3
Five Year Seasonal Graph			Graph
Five Year Graph of All Samples			Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, FDEP Watershed Monitoring Section, SWFWMD Water Quality Sampling Data, SWFWMD Water Quality Monitoring Program Data, USGS National Water Information System, City of St. Petersburg

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