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
APR-JUN 2023	1,361 ug/l		116 ug/l		21	63
JAN-MAR 2023	1,263 ug/l		106 ug/l	0.02 mg/l	22	64
OCT-DEC 2022	2,058 ug/l	36.7 ug/l	153 ug/l	0.02 mg/l	14	34
JUL-SEP 2022	922 ug/l	45.4 ug/l	90 ug/l	0.02 mg/l	30	79
APR-JUN 2022	1,389 ug/l	40.7 ug/l	89 ug/l	0.01 mg/l	30	83
JAN-MAR 2022	835 ug/l	43.0 ug/l	76 ug/l	0.01 mg/l	29	83
OCT-DEC 2021	616 ug/l	51.6 ug/l	77 ug/l	0.01 mg/l	26	69
JUL-SEP 2021	942 ug/l	48.0 ug/l	93 ug/l	0.02 mg/l	32	123
APR-JUN 2021	855 ug/l	42.3 ug/l	98 ug/l	0 mg/l	32	145
JAN-MAR 2021	665 ug/l	12.0 ug/l	103 ug/l	0.01 mg/l	22	119
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): Cape Coral Canal Watch, LAKEWATCH Volunteer Water Quality Monitoring, Lee County Environmental Laboratory, FDEP Historic Data from Legacy STORET, Florida Department of Environmental Protection, SFWMD Legacy Water Quality Sampling Data, FDEP South District Sampling Data, FDEP Watershed Monitoring Section, Florida LAKEWATCH, City of Sanibel, Natural Resources Department, SFWMD Water Quality Sampling Data, FDEP, Water Quality Standards and Special Projects (Florida), City of Cape Coral, USGS National Water Information System, Lee County Environmental Laboratories, FDEP - South Regional Operations Center, FDEP Watershed Monitoring Section, City of Sanibel Natural Resources Department, Sanibel-Captiva Conservation Foundation, FDEP - Watershed Assessment Section, City of Cape Coral

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
APR-JUN 2023	809 ug/l		49 ug/l		1	3
JAN-MAR 2023	794 ug/l		55 ug/l	0.03 mg/l	4	6
OCT-DEC 2022	1,096 ug/l		54 ug/l	0.02 mg/l	4	12
OCT-DEC 2022	1,686 ug/l		274 ug/l		2	2
JUL-SEP 2022	1,479 ug/l		178 ug/l		2	6
JUL-SEP 2022	2,700 ug/l		24 ug/l	0.03 mg/l	20	23
APR-JUN 2022	1,184 ug/l		50 ug/l	0.02 mg/l	6	10
APR-JUN 2022	1,413 ug/l		170 ug/l		2	6
JAN-MAR 2022	1,606 ug/l		222 ug/l		2	6
JAN-MAR 2022	1,103 ug/l		50 ug/l	0 mg/l	6	8
OCT-DEC 2021	898 ug/l		46 ug/l	0 mg/l	5	13
OCT-DEC 2021	1,789 ug/l		237 ug/l		2	6
JUL-SEP 2021	1,533 ug/l		221 ug/l		2	6
JUL-SEP 2021	1,943 ug/l		66 ug/l	0.01 mg/l	10	22
APR-JUN 2021	1,771 ug/l		68 ug/l	0 mg/l	10	18
APR-JUN 2021	1,202 ug/l		82 ug/l		2	6
JAN-MAR 2021	1,452 ug/l		173 ug/l		2	6
JAN-MAR 2021	1,157 ug/l		59 ug/l	0.01 mg/l	6	14
Five Year Seasonal Graph	Graph		Graph	Graph
Five Year Graph of All Samples	Graph		Graph	Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, Lee County Pondwatch, FDEP South District Sampling Data, City of Sanibel, Natural Resources Department, Sanibel-Captiva Conservation Foundation, City of Cape Coral, USGS National Water Information System, FDEP - South Regional Operations Center, Florida LAKEWATCH, City of Sanibel Natural Resources Department, Sanibel-Captiva Conservation Foundation

River	Flows Whole River Range	Flows Data by Segment	Levels Whole River Range	Levels Data By Segment
Gator Slough Canal	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

Source(s): Not Available

Source(s): Not Available