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 2026	1,085 ug/l		74 ug/l	0.02 mg/l	17	19
APR-JUN 2026	1,229 ug/l		82 ug/l	0.03 mg/l	10	15
JAN-MAR 2026	1,488 ug/l		61 ug/l	0.02 mg/l	32	43
OCT-DEC 2025	962 ug/l		61 ug/l	0.01 mg/l	16	31
JUL-SEP 2025	1,415 ug/l		73 ug/l	0.04 mg/l	34	54
APR-JUN 2025	1,055 ug/l		73 ug/l	0.03 mg/l	21	45
JAN-MAR 2025	1,600 ug/l		62 ug/l	0.03 mg/l	38	64
OCT-DEC 2024	1,324 ug/l		93 ug/l	0.02 mg/l	26	47
JUL-SEP 2024	1,438 ug/l		125 ug/l	0.06 mg/l	37	62
APR-JUN 2024	1,347 ug/l		65 ug/l	0.06 mg/l	30	45
JAN-MAR 2024	1,560 ug/l		68 ug/l	0.03 mg/l	47	76
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): Lake County Surface Water Quality, LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, SJRWMD Water Quality Data, Biological Research Associates , FDEP Central Regional Operations Center, Florida Fish and Wildlife Conservation Commission Water Quality Data, FDEP Watershed Monitoring Section, Orange County Surface Water Quality, Watershed Action Volunteer Water Quality Data, FDEP - Central Regional Operations Center, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Lake County Water Resource Management, Orange County Environmental Protection Division, St. Johns River Water Management District, 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 2026	1,494 ug/l		90 ug/l	0.02 mg/l	39	48
APR-JUN 2026	1,785 ug/l		52 ug/l	0.02 mg/l	21	34
JAN-MAR 2026	1,455 ug/l		54 ug/l	0.01 mg/l	69	94
OCT-DEC 2025	1,330 ug/l		41 ug/l	0.01 mg/l	40	76
JUL-SEP 2025	1,064 ug/l		34 ug/l	0.01 mg/l	117	194
APR-JUN 2025	1,075 ug/l		45 ug/l	0.01 mg/l	105	191
JAN-MAR 2025	1,253 ug/l		38 ug/l	0.01 mg/l	153	266
OCT-DEC 2024	1,150 ug/l		69 ug/l	0.01 mg/l	107	183
JUL-SEP 2024	1,049 ug/l		55 ug/l	0.04 mg/l	165	287
APR-JUN 2024	1,160 ug/l		50 ug/l	0.03 mg/l	157	256
JAN-MAR 2024	1,164 ug/l		50 ug/l	0.03 mg/l	159	286
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): Lake County Surface Water Quality, LAKEWATCH Supplemental Water Quality Sampling, LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, Orange County Environmental Protection Division, Legacy Orange County Surface Water Quality, SJRWMD Water Quality Data, Biological Research Associates , FDEP Central Regional Operations Center, Florida Fish and Wildlife Conservation Commission Water Quality Data, FDEP Watershed Monitoring Section, Orange County Surface Water Quality, FDEP, Water Quality Standards and Special Projects (Florida), Watershed Action Volunteer Water Quality Data, FDEP - Central Regional Operations Center, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Lake County Water Resource Management, Orange County Environmental Protection Division, St. Johns River Water Management District, FDEP - Watershed Assessment Section

• Water Quality Sampling Locations - View a map showing the point locations of water quality monitoring stations which collect data being presented on the Water Atlas.

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
Apopka Beauclair 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
Haynes Creek	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
Palatlakaha 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 NO DATA Recent water level data is unavailable.	No data table or graph available
Little 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 NO DATA Recent water level data is unavailable.	No data table or graph available
Big 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
Wolf Branch	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days NO DATA Recent water level data is unavailable.	No data table or graph available
Ocklawaha 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
Griffin Flowway	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
Green Swamp Run	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days NO DATA Recent water level data is unavailable.	No data table or graph available

Source(s): Not Available

Source(s): Not Available