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:

Total nitrogen showed no detectable trend between 1992 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 3831 29 1992 - 2025 0.628 -0.06222 0.69909 -0.00167 0.1443
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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:

Monthly average total phosphorus decreased by less than 0.01 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 3968 29 1992 - 2025 0.031 -0.08501 0.03538 -0.00013 0.0345
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Quality

Dissolved Oxygen - Continuous

Scatter plot of monthly average dissolved oxygen 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 dissolved oxygen 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 dissolved oxygen increased by 0.01 mg/L per year at one site and by 0.12 mg/L per year at the other. At four program locations, monthly average dissolved oxygen decreased between 0.01 and 0.06 mg/L per year. No detectable change in monthly average dissolved oxygen was observed at one location.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
apabpwq Increasing trend 193663 7 2020 - 2026 6.7 0.25 6.07 0.12 0.02
apacpwq Increasing trend 659305 25 2002 - 2026 7.1 0.12 7.08 0.01 0.00
apadbwq Decreasing trend 661293 25 2002 - 2026 7.3 -0.10 7.54 -0.01 0.02
apaebwq Decreasing trend 705983 32 1995 - 2026 6.8 -0.28 7.63 -0.06 0.00
apaeswq Decreasing trend 754657 32 1995 - 2026 6.8 -0.10 7.11 -0.02 0.00
apalmwq Decreasing trend 298361 11 2016 - 2026 6.4 -0.15 6.78 -0.05 0.05
apapcwq No detectable trend 311516 11 2016 - 2026 6.9 -0.03 6.94 -0.01 0.76
Map showing location of dissolved oxygen continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of dissolved oxygen continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

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 0.01 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 82123 34 1992 - 2025 7.5 -0.07851 7.66871 -0.00834 0.0341
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Dissolved Oxygen Saturation - Continuous

Scatter plot of monthly average dissolved oxygen saturation 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 dissolved oxygen saturation 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 dissolved oxygen saturation increased by 0.22% per year at one site and by 1.41% per year at the other. At two program locations, monthly average dissolved oxygen saturation decreased by 0.48% per year at one site and by 0.62% per year at the other. No detectable change in monthly average dissolved oxygen saturation was observed at three locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
apabpwq Increasing trend 193663 7 2020 - 2026 77.8 0.35 70.68 1.41 0.00
apacpwq Increasing trend 660833 25 2002 - 2026 94.3 0.19 91.80 0.22 0.00
apadbwq No detectable trend 665776 25 2002 - 2026 94.9 -0.03 96.89 -0.05 0.49
apaebwq Decreasing trend 701762 32 1995 - 2026 84.8 -0.25 92.00 -0.62 0.00
apaeswq No detectable trend 755867 32 1995 - 2026 84.6 -0.06 86.37 -0.15 0.11
apalmwq Decreasing trend 298897 11 2016 - 2026 75.2 -0.15 73.85 -0.48 0.04
apapcwq No detectable trend 314972 11 2016 - 2026 94.2 0.06 93.04 0.17 0.39
Map showing location of dissolved oxygen saturation continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of dissolved oxygen saturation continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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:

Dissolved oxygen saturation showed no detectable trend between 2000 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 5835 26 2000 - 2025 91.4 -0.09071 91.53316 -0.15923 0.0515
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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:

Monthly average salinity decreased by 0.11 ppt per year.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
All Decreasing trend 94502 37 1964 - 2025 16.8 -0.17042 21.34321 -0.11017 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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:

At three program locations, monthly average salinity increased between 0.01 and 0.36 ppt per year. No detectable change in monthly average salinity was observed at four locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
apabpwq Increasing trend 196215 7 2020 - 2026 0.1 0.41 0.07 0.01 0.00
apacpwq No detectable trend 675449 25 2002 - 2026 22.5 0.03 21.69 0.03 0.45
apadbwq No detectable trend 660145 25 2002 - 2026 22.3 0.01 21.67 0.01 0.85
apaebwq No detectable trend 792228 32 1995 - 2026 10.1 0.05 9.24 0.03 0.17
apaeswq No detectable trend 800886 32 1995 - 2026 7.6 0.07 6.97 0.04 0.07
apalmwq Increasing trend 312951 11 2016 - 2026 0.1 0.28 0.06 0.02 0.00
apapcwq Increasing trend 312976 11 2016 - 2026 27.3 0.19 25.15 0.36 0.01
Map showing location of salinity continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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 five program locations, monthly average water temperature increased between 0.02 and 0.04°C per year. No detectable change in monthly average water temperature was observed at three locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
APCF1 Increasing trend 1453052 22 2005 - 2026 23.3 0.13 22.93 0.04 0.01
apabpwq No detectable trend 196215 7 2020 - 2026 22.4 0.21 21.87 0.18 0.06
apacpwq Increasing trend 714443 25 2002 - 2026 23.4 0.16 22.95 0.03 0.00
apadbwq Increasing trend 687997 25 2002 - 2026 23.3 0.16 22.86 0.03 0.00
apaebwq Increasing trend 807299 32 1995 - 2026 24.1 0.16 23.02 0.02 0.00
apaeswq Increasing trend 810119 32 1995 - 2026 24.1 0.20 22.87 0.04 0.00
apalmwq No detectable trend 315207 11 2016 - 2026 22.5 0.04 23.38 0.01 0.69
apapcwq No detectable trend 317938 11 2016 - 2026 22.9 -0.02 23.76 -0.02 0.80
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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 0.02°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 95211 37 1964 - 2025 23.4 0.12479 20.98081 0.01988 0.0006
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

pH - Continuous

Scatter plot of monthly average pH 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 pH 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 pH increased by 0.03 pH units per year. At four program locations, monthly average pH decreased between less than 0.01 and 0.01 pH units per year. No detectable change in monthly average pH was observed at two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
apabpwq Increasing trend 194397 7 2020 - 2026 7.1 0.21 7.00 0.03 0.04
apacpwq No detectable trend 656837 25 2002 - 2026 8.0 0.02 8.01 0.00 0.72
apadbwq Decreasing trend 645135 25 2002 - 2026 8.0 -0.10 8.06 0.00 0.02
apaebwq Decreasing trend 762842 32 1995 - 2026 7.6 -0.10 7.63 -0.01 0.01
apaeswq Decreasing trend 755459 32 1995 - 2026 7.5 -0.09 7.58 -0.01 0.02
apalmwq No detectable trend 306501 11 2016 - 2026 7.1 0.00 7.10 0.00 0.93
apapcwq Decreasing trend 312076 11 2016 - 2026 8.1 -0.30 8.13 -0.01 0.00
Map showing location of ph continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of ph continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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:

Monthly average pH decreased by 0.01 pH units 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 67324 35 1964 - 2025 7.98 -0.33947 8.29946 -0.01016 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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 three program locations, monthly average specific conductivity increased between 0.01 and 0.51 mS/cm per year. No detectable change in monthly average specific conductivity was observed at four locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
apabpwq Increasing trend 196215 7 2020 - 2026 0.12 0.37 0.08 0.01 0.00
apacpwq No detectable trend 675467 25 2002 - 2026 35.76 0.03 34.46 0.04 0.51
apadbwq No detectable trend 660231 25 2002 - 2026 35.38 0.01 34.38 0.01 0.92
apaebwq No detectable trend 792357 32 1995 - 2026 17.12 0.05 15.57 0.05 0.16
apaeswq No detectable trend 801369 32 1995 - 2026 13.27 0.07 12.34 0.07 0.08
apalmwq Increasing trend 312951 11 2016 - 2026 0.15 0.27 0.13 0.02 0.00
apapcwq Increasing trend 312978 11 2016 - 2026 42.46 0.20 39.50 0.51 0.01
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Clarity

Turbidity - Continuous

Scatter plot of monthly average turbidity 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 turbidity 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 turbidity decreased by 0.1 NTU per year at one site and by 0.19 NTU per year at the other. No detectable change in monthly average turbidity was observed at five locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
apabpwq No detectable trend 196208 7 2020 - 2026 11 -0.20 12.55 -0.49 0.06
apacpwq No detectable trend 672498 25 2002 - 2026 8 -0.03 12.77 -0.03 0.54
apadbwq No detectable trend 647066 25 2002 - 2026 10 0.06 16.34 0.06 0.20
apaebwq Decreasing trend 680779 28 1997 - 2026 13 -0.19 19.33 -0.19 0.00
apaeswq Decreasing trend 744747 31 1996 - 2026 9 -0.14 11.31 -0.10 0.00
apalmwq No detectable trend 284580 11 2016 - 2026 11 0.00 12.15 -0.01 1.00
apapcwq No detectable trend 301927 11 2016 - 2026 7 -0.07 11.10 -0.11 0.36
Map showing location of turbidity continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.
Map showing location of turbidity continuous water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

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 0.17 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 22997 32 1992 - 2025 5.1 0.27472 4.66051 0.17368 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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 decreased by 0.16 mg/L per year, indicating an increase 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 Decreasing trend 3481 29 1992 - 2025 10 -0.17823 14.90129 -0.1625 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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:

Monthly average chlorophyll a, uncorrected for pheophytin, increased by 0.53 µg/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 3211 25 2000 - 2025 10 0.41136 0.73848 0.52857 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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:

Monthly average chlorophyll a, corrected for pheophytin, increased by 0.44 µg/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 3875 27 1999 - 2025 7.5 0.51631 -0.78714 0.43647 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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:

Monthly average Secchi depth became shallower by less than 0.01 m 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
Field Increasing trend 47258 31 1992 - 2025 -0.8 0.18646 -0.9898 0.00481 0
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. 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 2.1 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 183 13 2007 - 2025 23 0.20495 9.63015 2.1 0.0036
Map showing location of discrete water quality sampling locations within the boundaries of Apalachicola National Estuarine Research Reserve. 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 Apalachicola National Estuarine Research Reserve. The bubble size on the maps above reflect the amount of data available at each sampling site.