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	1,051 ug/l		36 ug/l		14	16
APR-JUN 2023	1,090 ug/l		68 ug/l		53	110
JAN-MAR 2023	1,039 ug/l		62 ug/l		55	148
OCT-DEC 2022	1,003 ug/l		44 ug/l		63	159
JUL-SEP 2022	883 ug/l	71.5 ug/l	37 ug/l	0.01 mg/l	64	130
APR-JUN 2022	1,005 ug/l	46.5 ug/l	53 ug/l	0.02 mg/l	64	157
JAN-MAR 2022	935 ug/l	92.9 ug/l	44 ug/l	0.01 mg/l	64	169
OCT-DEC 2021	863 ug/l	121.6 ug/l	37 ug/l	0.01 mg/l	60	163
JUL-SEP 2021	921 ug/l	75.7 ug/l	43 ug/l	0.02 mg/l	71	180
APR-JUN 2021	926 ug/l	54.2 ug/l	55 ug/l	0.01 mg/l	65	169
JAN-MAR 2021	890 ug/l	74.3 ug/l	40 ug/l	0.01 mg/l	71	179
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): Charlotte Harbor Estuaries Volunteer Water Quality Monitoring Network, Lee County Pondwatch, Lee County Environmental Laboratory, FDEP Historic Data from Legacy STORET, SFWMD Legacy Water Quality Sampling Data, FDEP Charlotte Harbor Aquatic/Buffer Preserves Sampling Data, City of Bonita Springs, Lee County, FDEP South District Sampling Data, FDEP Watershed Monitoring Section, SFWMD Water Quality Sampling Data, FDEP, Water Quality Standards and Special Projects (Florida), USGS National Water Information System, FDEP - Charlotte Harbor Aquatic Preserves, City of Bonita Springs, City of Fort Myers, Lee County Environmental Laboratories, FDEP - South Regional Operations Center, FDEP Watershed Monitoring Section, Sanibel-Captiva Conservation Foundation

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	822 ug/l		27 ug/l		3	3
APR-JUN 2023	837 ug/l		51 ug/l		13	19
JAN-MAR 2023	765 ug/l		29 ug/l		19	57
OCT-DEC 2022	888 ug/l		57 ug/l		24	63
OCT-DEC 2022	1,081 ug/l		52 ug/l		13	38
JUL-SEP 2022	849 ug/l		43 ug/l		14	37
JUL-SEP 2022	704 ug/l	24.1 ug/l	28 ug/l	0.01 mg/l	22	56
APR-JUN 2022	814 ug/l	13.9 ug/l	32 ug/l	0.01 mg/l	24	64
APR-JUN 2022	1,003 ug/l		65 ug/l		14	38
JAN-MAR 2022	706 ug/l	22.4 ug/l	27 ug/l	0.01 mg/l	24	70
JAN-MAR 2022	1,075 ug/l		39 ug/l		13	39
OCT-DEC 2021	1,101 ug/l		75 ug/l		14	42
OCT-DEC 2021	783 ug/l	31.9 ug/l	36 ug/l	0.01 mg/l	24	57
JUL-SEP 2021	715 ug/l	22.7 ug/l	32 ug/l	0.01 mg/l	24	64
JUL-SEP 2021	995 ug/l		163 ug/l		15	41
APR-JUN 2021	1,044 ug/l		68 ug/l		16	44
APR-JUN 2021	789 ug/l	14.5 ug/l	34 ug/l	0 mg/l	24	70
JAN-MAR 2021	697 ug/l	20.2 ug/l	34 ug/l	0 mg/l	24	71
JAN-MAR 2021	1,133 ug/l		57 ug/l		15	44
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, Lee County Pondwatch, Lee County Environmental Laboratory, FDEP South District Sampling Data, FDEP Watershed Monitoring Section, Lee County Environmental Laboratories, FDEP - South Regional Operations Center, Florida LAKEWATCH, FDEP - Watershed Assessment Section

River	Flows Whole River Range	Flows Data by Segment	Levels Whole River Range	Levels Data By Segment
Imperial 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 lower than they have been historically.	Levels Data Table and Graph
Fiddlesticks 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
Spring 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
Estero 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 lower than they have been historically.	Levels Data Table and Graph
Six Mile Cypress 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
Kehl 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 lower than they have been historically.	Levels Data Table and Graph

Source(s): Not Available

Source(s): Not Available