Lake Okeechobee WBID Evaluation

Source Code
Study Area
Data
Water Quality Evaluation

Updated: August 03, 2021

Data used in this analysis was retrieved from the South Florida Water Management District online environmental database (DBHYDRO). (Site list can be downloaded here (as .xlsx) :

Source Code

GitHub repo https://github.com/owper-tech/LakeO_WQ

Study Area

Figure 1. Lake Okeechobee Water Body IDs (WBIDs) and monitoring locations sampled by the South Florida Water Management District.

Data

Alkalinity, Color, Chlorophyll-a, Total Phosphorus and Total Nitrogen (direct measure or calculated NO_x + TKN) data data were retrieved from the South Florida Water Management District online environmental database (DBHYDRO) from monitoring locations (Fig 1) between May 1, 2000 and April 30, 2021. Data reported less than the minimum detection limit (MDL) where set to one-half the MDL. Annual geometric mean concentrations for all parameters and stations were calculated for stations and parameters with greater than or equal to four samples per water year and atleast one sample in the wet (May - October) and Dry (November - April). Annual geometric mean concentrations were averaged across water body identification (WBID) segments and evaluated relative to the numeric interpretations of narrative nutrient criteria presented below. For purposes of this analysis long-term is identified as a 3-year period.

62-302.531 FAC Numeric Interpretations of Narrative Nutrient Criteria.

Full details associated with the Numeric Interpretation of Narrative Nutrient Criteria can be found here.

62-302.531(2)(b)1 FAC

For lakes, the applicable numeric interpretations of the narrative nutrient criterion in paragraph 62-302.530(47)(b), F.A.C., for chlorophyll a are shown in the table below. The applicable interpretations for TN and TP will vary on an annual basis, depending on the availability of chlorophyll a data and the concentrations of nutrients and chlorophyll a in the lake, as described below. The applicable numeric interpretations for TN, TP, and chlorophyll a shall not be exceeded more than once in any consecutive three year period.

62-302.531(2)(b)1b FAC. Lake-Specific Numeric Interpretations of the Narrative Nutrient Criterion.
	Minimum calculated numeric interpretation	Maximum calculated numeric interpretation
≥ 40 Platinum Cobalt Units	20	0.05	1.27	0.16	2.23
≤ 40 Platinum Cobalt Units and ≥ 20 mg/L CaCO₃	20	0.03	1.05	0.09	1.91
≤ 40 Platinum Cobalt Units and ≤ 20 mg/L CaCO₃	6	0.01	0.51	0.03	0.93

Water Quality Evaluation

3212A

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212A with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212A	2001	110	32	23	0.10	1.49
3212A	2002	82	67	19	0.11	1.54
3212A	2003	52	101	14	0.08	1.32
3212A	2004	51	92	12	0.09	1.15
3212A	2005	70	64	14	0.13	1.64
3212A	2006	56	75	12	0.16	1.48
3212A	2007	103	37	10	0.16	1.47
3212A	2008	55	100	9	0.11	1.39
3212A	2009	85	68	9	0.12	1.49
3212A	2010	65	73	11	0.08	1.32
3212A	2011	79	51	12	0.08	1.22
3212A	2012	80	58	10	0.08	1.33
3212A	2013	73	73	6	0.09	1.26
3212A	2014	60	70	10	0.10	1.21
3212A	2015	54	82	11	0.09	1.22
3212A	2016	48	85	16	0.09	1.22
3212A	2017	54	67	21	0.10	1.20
3212A	2018	65	102	15	0.19	1.67
3212A	2019	58	75	23	0.11	1.40
3212A	2020	62	74	21	0.09	1.32
3212A	2021	52	99	20	0.11	1.39
1Includes Stations: KISSR0.0, LZ2

3212B

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212B with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212B	2001	119	26	27	0.12	1.61
3212B	2002	115	36	21	0.11	1.52
3212B	2003	81	57	25	0.11	1.47
3212B	2004	67	60	19	0.10	1.31
3212B	2005	92	48	18	0.21	1.92
3212B	2006	83	51	8	0.20	1.75
3212B	2007	111	31	8	0.19	1.51
3212B	2008	122	36	20	0.20	1.62
3212B	2009	105	46	16	0.15	1.82
3212B	2010	90	49	22	0.11	1.57
3212B	2011	98	32	21	0.10	1.42
3212B	2012	111	31	12	0.11	1.46
3212B	2013	88	42	13	0.12	1.44
3212B	2014	72	49	12	0.12	1.27
3212B	2015	72	56	17	0.12	1.29
3212B	2016	71	55	15	0.10	1.34
3212B	2017	78	43	20	0.13	1.40
3212B	2018	86	49	10	0.19	1.71
3212B	2019	84	44	18	0.14	1.43
3212B	2020	87	46	19	0.14	1.48
3212B	2021	67	73	22	0.12	1.49
1Includes Stations: L001

3212C

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212C with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212C	2001
3212C	2002	124	184	13	0.14	2.58
3212C	2003	92	116	11	0.05	1.58
3212C	2004	94	70	11	0.03	1.21
3212C	2005	104	80	14	0.05	1.42
3212C	2006	88	68	15	0.10	1.30
3212C	2007	61	103	13	0.18	1.68
3212C	2008
3212C	2009	115	126	16	0.24	1.92
3212C	2010	119	86	17	0.08	1.87
3212C	2011	104	96	12	0.05	1.49
3212C	2012
3212C	2013	103	125	11	0.06	1.59
3212C	2014	106	81	7	0.04	1.27
3212C	2015	90	105	5	0.04	1.19
3212C	2016	88	144	4	0.05	1.32
3212C	2017	85	100	5	0.03	1.06
3212C	2018	58	157	8	0.08	1.72
3212C	2019
3212C	2020	80	94	19	0.08	1.66
3212C	2021	82	116	11	0.08	1.46
1Includes Stations: FEBIN, MBOXSOU, MH16000, MH24000, MH32000, OISLAND

3212D

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212D with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212D	2001	112	28	26	0.09	1.53
3212D	2002	97	61	20	0.07	1.52
3212D	2003	102	59	23	0.07	1.52
3212D	2004	96	47	27	0.06	1.28
3212D	2005	108	59	20	0.13	1.82
3212D	2006	90	50	16	0.19	1.68
3212D	2007	99	48	15	0.16	1.51
3212D	2008	120	33	17	0.12	1.40
3212D	2009	103	102	19	0.17	1.79
3212D	2010	104	61	19	0.07	1.48
3212D	2011	117	43	19	0.06	1.46
3212D	2012	105	33	14	0.06	1.28
3212D	2013	97	61	15	0.08	1.40
3212D	2014	107	40	21	0.06	1.29
3212D	2015	102	46	18	0.07	1.27
3212D	2016	95	57	16	0.07	1.28
3212D	2017	92	46	19	0.07	1.23
3212D	2018	83	77	17	0.13	1.53
3212D	2019	97	34	22	0.11	1.30
3212D	2020	101	48	19	0.08	1.35
3212D	2021	94	51	22	0.07	1.30
1Includes Stations: TIN13700, TIN16100, POLESOUT, FEBOUT, L008, L005

3212E

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212E with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212E	2001	122	25	24	0.13	1.59
3212E	2002	120	32	17	0.11	1.54
3212E	2003	106	37	26	0.12	1.53
3212E	2004	89	38	20	0.11	1.28
3212E	2005	104	39	17	0.22	2.18
3212E	2006	100	36	9	0.21	1.83
3212E	2007	118	27	7	0.18	1.45
3212E	2008	132	27	17	0.20	1.62
3212E	2009	115	37	14	0.16	1.85
3212E	2010	107	31	16	0.13	1.49
3212E	2011	110	24	18	0.11	1.42
3212E	2012	121	25	9	0.10	1.38
3212E	2013	108	30	8	0.14	1.52
3212E	2014	107	25	9	0.14	1.35
3212E	2015	113	24	10	0.15	1.32
3212E	2016	107	26	12	0.14	1.30
3212E	2017	99	26	8	0.15	1.30
3212E	2018	103	32	6	0.20	1.66
3212E	2019	101	27	10	0.16	1.26
3212E	2020	105	45	10	0.17	1.47
3212E	2021	101	32	16	0.16	1.45
1Includes Stations: L002, L003, L004

3212F

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212F with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212F	2001	103	28	12	0.06	1.29
3212F	2002	120	40	26	0.09	1.57
3212F	2003	107	37	25	0.09	1.45
3212F	2004	96	33	31	0.09	1.34
3212F	2005	102	34	11	0.15	1.86
3212F	2006	90	38	11	0.20	1.74
3212F	2007	103	37	8	0.12	1.21
3212F	2008	115	25	14	0.06	1.28
3212F	2009	117	37	14	0.09	1.54
3212F	2010	111	26	16	0.06	1.30
3212F	2011	112	22	14	0.07	1.34
3212F	2012	108	32	7	0.04	1.24
3212F	2013	105	29	10	0.07	1.25
3212F	2014	107	25	29	0.09	1.35
3212F	2015	107	29	22	0.10	1.31
3212F	2016	100	31	19	0.08	1.23
3212F	2017	94	30	26	0.12	1.43
3212F	2018	97	47	9	0.17	1.58
3212F	2019	98	31	18	0.13	1.41
3212F	2020	100	30	12	0.08	1.15
3212F	2021	99	31	12	0.10	1.16
1Includes Stations: PALMOUT, LZ30

3212G

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212G with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212G	2001	122	25	20	0.12	1.60
3212G	2002	122	32	15	0.12	1.56
3212G	2003	112	34	20	0.16	1.65
3212G	2004	97	30	17	0.13	1.39
3212G	2005	110	35	12	0.22	2.13
3212G	2006	102	34	8	0.23	1.82
3212G	2007	116	27	8	0.18	1.39
3212G	2008	130	29	16	0.16	1.50
3212G	2009	121	32	11	0.16	1.68
3212G	2010	112	29	13	0.14	1.46
3212G	2011	113	22	14	0.12	1.41
3212G	2012	122	24	11	0.10	1.31
3212G	2013	110	26	7	0.13	1.43
3212G	2014	106	26	10	0.13	1.29
3212G	2015	111	24	9	0.15	1.34
3212G	2016	107	26	9	0.14	1.31
3212G	2017	98	27	10	0.16	1.42
3212G	2018	101	36	7	0.20	1.61
3212G	2019	102	29	11	0.17	1.33
3212G	2020	106	31	9	0.16	1.38
3212G	2021	102	30	14	0.15	1.39
1Includes Stations: L006, LZ40, CLV10A

3212H

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212H with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212H	2001	113	29	13	0.05	1.36
3212H	2002	121	46	26	0.10	1.57
3212H	2003	110	36	19	0.08	1.44
3212H	2004	98	33	26	0.09	1.32
3212H	2005	104	35	12	0.15	1.82
3212H	2006	99	38	11	0.20	1.75
3212H	2007	109	31	5	0.11	1.20
3212H	2008	114	27	7	0.02	1.12
3212H	2009	113	41	21	0.12	1.60
3212H	2010	114	28	22	0.07	1.38
3212H	2011	116	24	13	0.08	1.39
3212H	2012	115	29	7	0.04	1.29
3212H	2013	107	32	10	0.06	1.22
3212H	2014	111	27	33	0.08	1.40
3212H	2015	108	26	17	0.08	1.20
3212H	2016	106	28	15	0.07	1.20
3212H	2017	97	31	26	0.10	1.33
3212H	2018	102	43	7	0.15	1.57
3212H	2019	99	31	16	0.13	1.45
3212H	2020	104	28	8	0.08	1.17
3212H	2021	100	35	8	0.10	1.26
1Includes Stations: L007, POLE3S, RITTAE2

3212I

Annual Geometric Mean concentration for Alkalinity, Color, Chlorophyll, Total Phosphorus and Total Nitrogen .

Average annual geometric mean concentration across WBID3212I with annual exceedances identified by shaded area on the table.
WBID1	WY	Alkalinity (mg L⁻¹)	Color (PCU)	Chlorophyll-a (μg L⁻¹)	Total Phosphorus (mg L⁻¹)	Total Nitrogen (mg L⁻¹)
3212I	2001	118	33	15	0.06	1.52
3212I	2002	130	48	27	0.09	1.57
3212I	2003	111	37	16	0.08	1.38
3212I	2004	100	34	24	0.08	1.24
3212I	2005	106	36	11	0.13	1.85
3212I	2006	100	38	13	0.20	1.74
3212I	2007	111	32	4	0.10	1.19
3212I	2008	130	37	9	0.03	1.30
3212I	2009	132	76	21	0.12	1.72
3212I	2010	113	31	14	0.08	1.33
3212I	2011	118	24	10	0.08	1.31
3212I	2012	118	30	6	0.04	1.22
3212I	2013	110	33	10	0.07	1.21
3212I	2014	113	27	20	0.08	1.24
3212I	2015	110	27	9	0.09	1.17
3212I	2016	107	27	11	0.09	1.30
3212I	2017	97	32	13	0.12	1.33
3212I	2018	104	40	6	0.17	1.59
3212I	2019	96	32	13	0.14	1.37
3212I	2020	103	27	6	0.09	1.15
3212I	2021	99	35	7	0.11	1.20
1Includes Stations: PELBAY3, PELMID, LZ25A, LZ25

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		Minimum calculated numeric interpretation		Maximum calculated numeric interpretation
Long Term Geometric Mean Lake Color and Alkalinity	Annual Geometric Mean Chlorophyll-a (μg L⁻¹)	Annual Geometric Mean Total Phosphorus (mg L⁻¹)	Annual Geometric Mean Total Nitrogen (mg L⁻¹)	Annual Geometric Mean Total Phosphorus (mg L⁻¹)	Annual Geometric Mean Total Nitrogen (mg L⁻¹)
≥ 40 Platinum Cobalt Units	20	0.05	1.27	0.16	2.23
≤ 40 Platinum Cobalt Units and ≥ 20 mg/L CaCO₃	20	0.03	1.05	0.09	1.91
≤ 40 Platinum Cobalt Units and ≤ 20 mg/L CaCO₃	6	0.01	0.51	0.03	0.93