Indicators

Nutrients

Total Nitrogen - Discrete

Scatter plot of monthly average total nitrogen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only nitrogen values obtained from laboratory analyses (triangles) are included in the plot.
Scatter plot of monthly average total nitrogen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only nitrogen values obtained from laboratory analyses (triangles) are included in the plot.
Table:

Monthly average total nitrogen decreased by 0.02 mg/L per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Decreasing trend 4775 35 1991 - 2025 0.706 -0.27174 0.92384 -0.01642 0
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Total Phosphorus - Discrete

Scatter plot of monthly average total phosphorus over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only phosphorus values obtained from laboratory analyses (triangles) are included in the plot.
Scatter plot of monthly average total phosphorus over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only phosphorus values obtained from laboratory analyses (triangles) are included in the plot.
Table:

Total phosphorus showed no detectable trend between 1991 and 2025.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab No detectable trend 6759 35 1991 - 2025 0.042 0.06964 0.03492 0.00009 0.2154
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Quality

Dissolved Oxygen - Discrete

Scatter plot of monthly average dissolved oxygen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen values measured in the field (circles) are included in the plot.
Scatter plot of monthly average dissolved oxygen over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen values measured in the field (circles) are included in the plot.
Table:

Monthly average dissolved oxygen decreased by 0.02 mg/L per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Decreasing trend 13210 35 1991 - 2025 5.59 -0.26282 5.81215 -0.02301 0
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Dissolved Oxygen Saturation - Discrete

Scatter plot of monthly average dissolved oxygen saturation over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen saturation values measured in the field (circles) are included in the plot.
Scatter plot of monthly average dissolved oxygen saturation over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only dissolved oxygen saturation values measured in the field (circles) are included in the plot.
Table:

Monthly average dissolved oxygen saturation decreased by 0.21% per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Decreasing trend 11226 31 1995 - 2025 76 -0.15406 77.67006 -0.2105 0.0001
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Salinity - Discrete

Scatter plot of monthly average salinity over time. If the time series included ten or more years of discrete observations, significant (blue) or non-significant (magenta) trend lines are also shown. Discrete salinity values derived from grab samples analyzed in the field (circles) or the laboratory (triangles) are both included in the plot.
Scatter plot of monthly average salinity over time. If the time series included ten or more years of discrete observations, significant (blue) or non-significant (magenta) trend lines are also shown. Discrete salinity values derived from grab samples analyzed in the field (circles) or the laboratory (triangles) are both included in the plot.
Table:

Salinity showed no detectable trend between 1972 and 2025.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
All No detectable trend 12306 36 1972 - 2025 24.4 -0.00982 21.46318 -0.00921 0.7936
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Salinity - Continuous

Scatter plot of monthly average salinity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average salinity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Table:

No detectable change in monthly average salinity was observed at four locations. There was insufficient data to fit a model for one location.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02277743 Insufficient data 1144 3 2019 - 2021 32.0 - - - -
265645080055900 No detectable trend 1354 5 2002 - 2006 36.0 0.22 35.43 0.16 0.16
265656080063500 No detectable trend 2046 5 2007 - 2011 36.0 0.01 35.53 0 1
265906080093500 No detectable trend 9690 24 2003 - 2026 0.3 0.05 0.25 0 0.23
265929080091800 No detectable trend 8362 25 2002 - 2026 0.4 0.04 0.76 0 0.33
Map showing location of salinity continuous water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of salinity continuous water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Temperature - Continuous

Scatter plot of monthly average water temperature over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average water temperature over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Table:

At two program locations, monthly average water temperature increased by 0.04°C per year. No detectable change in monthly average water temperature was observed at two locations. There was insufficient data to fit a model for one location.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02277743 Insufficient data 1122 3 2019 - 2021 26.3 - - - -
265645080055900 No detectable trend 1354 5 2002 - 2006 26.6 -0.29 27.27 -0.17 0.07
265656080063500 No detectable trend 2664 5 2007 - 2011 27.6 0.08 26.5 0.06 0.45
265906080093500 Increasing trend 12760 24 2003 - 2026 25.6 0.26 25.08 0.04 0
265929080091800 Increasing trend 8383 25 2002 - 2026 25.7 0.23 25.02 0.04 0
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Temperature - Discrete

Scatter plot of monthly average water temperature over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only water temperature measurements taken in the field (circles) are included in the plot.
Scatter plot of monthly average water temperature over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only water temperature measurements taken in the field (circles) are included in the plot.
Table:

Monthly average water temperature increased by 0.03°C per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Increasing trend 10905 36 1972 - 2025 25.6 0.15429 25.08312 0.03314 0.0001
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

pH - Discrete

Scatter plot of monthly average pH over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only pH values measured in the field (circles) are included in the plot.
Scatter plot of monthly average pH over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only pH values measured in the field (circles) are included in the plot.
Table:

pH showed no detectable trend between 1991 and 2025.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field No detectable trend 12916 35 1991 - 2025 7.7 -0.06325 7.72989 -0.00098 0.2676
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Specific Conductivity - Continuous

Scatter plot of monthly average specific conductivity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Scatter plot of monthly average specific conductivity over time at continuously monitored program locations. Each location is analyzed separately, with significant (blue) or non-significant (magenta) trend lines shown for time series that included five or more years of observations.
Table:

At one program location, monthly average specific conductivity increased by 0.02 mS/cm per year. No detectable change in monthly average specific conductivity was observed at two locations. There was insufficient data to fit a model for one location.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
02277743 Insufficient data 1425 3 2019 - 2021 50.10 - - - -
265656080063500 No detectable trend 2550 5 2007 - 2011 53.90 0.04 53.66 0.08 0.93
265906080093500 No detectable trend 13751 21 2006 - 2026 0.56 0.07 0.55 0 0.14
265929080091800 Increasing trend 6917 21 2006 - 2026 0.85 0.11 1.41 0.02 0.02
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Clarity

Turbidity - Discrete

Scatter plot of monthly average turbidity over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only turbidity values measured in the laboratory (triangles) are included in the plot.
Scatter plot of monthly average turbidity over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only turbidity values measured in the laboratory (triangles) are included in the plot.
Table:

Monthly average turbidity increased by 0.05 NTU per year, indicating a decrease in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 6632 35 1991 - 2025 2.7 0.3358 1.93661 0.04586 0
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Total Suspended Solids - Discrete

Scatter plot of monthly average total suspended solids (TSS) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only TSS values obtained from laboratory analyses (triangles) are included in the plot.
Scatter plot of monthly average total suspended solids (TSS) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only TSS values obtained from laboratory analyses (triangles) are included in the plot.
Table:

Monthly average total suspended solids increased by 0.03 mg/L per year, indicating a decrease in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 6264 32 1994 - 2025 4 0.14544 3.0446 0.03434 0.0056
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Chlorophyll a, Uncorrected for Pheophytin - Discrete

Scatter plot of monthly average levels of chlorophyll a, uncorrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Scatter plot of monthly average levels of chlorophyll a, uncorrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Table:

Chlorophyll a, uncorrected for pheophytin, showed no detectable trend between 1997 and 2025.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab No detectable trend 6007 29 1997 - 2025 5.6 0.03611 6.73567 0.02125 0.3828
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Chlorophyll a, Corrected for Pheophytin - Discrete

Scatter plot of monthly average levels of chlorophyll a, corrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Scatter plot of monthly average levels of chlorophyll a, corrected for pheophytin, over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed chlorophyll a (triangles) is included in the plot.
Table:

Chlorophyll a, corrected for pheophytin, showed no detectable trend between 2001 and 2025.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab No detectable trend 4638 22 2001 - 2025 4.5 -0.01408 5.28487 -0.00825 0.7474
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Secchi Depth - Discrete

Scatter plot of monthly average Secchi depth over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Secchi depth is only measured in the field (circles).
Scatter plot of monthly average Secchi depth over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Secchi depth is only measured in the field (circles).
Table:

Secchi depth showed no detectable trend between 1994 and 2025.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field No detectable trend 5062 32 1994 - 2025 -1.2 0.04058 -1.26426 0.00036 0.8485
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Colored Dissolved Organic Matter - Discrete

Scatter plot of monthly average colored dissolved organic matter (CDOM) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed CDOM (triangles) is included in the plot.
Scatter plot of monthly average colored dissolved organic matter (CDOM) over time. If the time series included ten or more years of discrete observations, a significant (blue) or non-significant (magenta) trend line is also shown. Only laboratory-analyzed CDOM (triangles) is included in the plot.
Table:

Monthly average colored dissolved organic matter increased by 0.83 PCU per year, indicating a decrease in water clarity.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Increasing trend 1291 25 2001 - 2025 45 0.25694 17.96211 0.83333 0
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of discrete water quality sampling locations within the boundaries of Loxahatchee River-Lake Worth Creek Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.