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 increased 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 Increasing trend 2023 32 1989 - 2025 0.38645 0.13153 0.37438 0.00375 0.0024
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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 1989 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 2423 32 1989 - 2025 0.04349 0.07862 0.04309 0.00013 0.0582
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 three program locations, monthly average dissolved oxygen decreased between 0.02 and 0.02 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
rkbfbwq No detectable trend 612445 23 2002 - 2026 5.4 -0.03 5.21 0.00 0.51
rkbfuwq Decreasing trend 644958 22 2002 - 2026 5.1 -0.30 5.27 -0.02 0.00
rkbmbwq Decreasing trend 665650 24 2000 - 2026 4.4 -0.24 4.86 -0.02 0.00
rkbpbwq Decreasing trend 341310 11 2016 - 2026 5.0 -0.15 5.17 -0.02 0.04
Map showing location of dissolved oxygen continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 10769 35 1989 - 2025 5.8 -0.08181 6.02669 -0.0108 0.0288
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 three program locations, monthly average dissolved oxygen saturation decreased between 0.17 and 0.29% per year. No detectable change in monthly average dissolved oxygen saturation 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
rkbfbwq No detectable trend 616751 23 2002 - 2026 79.1 0.03 78.42 0.04 0.51
rkbfuwq Decreasing trend 645300 22 2002 - 2026 72.7 -0.20 76.89 -0.17 0.00
rkbmbwq Decreasing trend 671974 24 2000 - 2026 65.4 -0.21 73.09 -0.23 0.00
rkbpbwq Decreasing trend 344747 11 2016 - 2026 72.9 -0.15 77.04 -0.29 0.04
Map showing location of dissolved oxygen saturation continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 Cape Romano-Ten Thousand Islands 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:

There was insufficient data to fit a model for dissolved oxygen saturation.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Insufficient data 112 7 2008 - 2025 78.1 - - - -
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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 1956 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 11152 45 1956 - 2025 31.9 -0.04349 33.00994 -0.02251 0.2601
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Salinity - Continuous

National Water Information System - 7

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 two program locations, monthly average salinity increased by 0.25 ppt per year at one site and by 0.28 ppt per year at the other. At two program locations, monthly average salinity decreased by 0.06 ppt per year at one site and by 0.44 ppt per year at the other. No detectable change in monthly average salinity was observed at six locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
255123081321300 Decreasing trend 1809 8 2007 - 2017 32 -0.23 35.11 -0.44 0.02
255138081321701 Increasing trend 3074 10 2017 - 2026 32 0.21 29.33 0.28 0.01
255432081303900 No detectable trend 6556 20 2006 - 2026 22 -0.05 26.67 -0.06 0.29
255443081314700 Insufficient data 1465 4 2007 - 2011 32 - - - -
255532081314300 Insufficient data 902 3 2009 - 2011 31 - - - -
255534081324000 No detectable trend 6250 19 2007 - 2026 32 -0.02 33.56 -0.03 0.62
255654081350200 No detectable trend 6271 19 2007 - 2026 32 -0.03 33.07 -0.03 0.52
255732081363700 No detectable trend 1434 5 2011 - 2015 34 0.25 32.15 0.52 0.1
Map showing location of salinity continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Rookery Bay National Estuarine Research Reserve System-Wide Monitoring Program - 354

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 two program locations, monthly average salinity increased by 0.25 ppt per year at one site and by 0.28 ppt per year at the other. At two program locations, monthly average salinity decreased by 0.06 ppt per year at one site and by 0.44 ppt per year at the other. No detectable change in monthly average salinity was observed at six locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
rkbfbwq No detectable trend 711718 25 2002 - 2026 30.0 0.05 30.80 0.04 0.21
rkbfuwq No detectable trend 725512 25 2002 - 2026 26.5 0.03 27.82 0.03 0.51
rkbmbwq Decreasing trend 744660 27 2000 - 2026 33.4 -0.09 34.80 -0.06 0.02
rkbpbwq Increasing trend 341625 11 2016 - 2026 30.7 0.17 29.69 0.25 0.02
Map showing location of salinity continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Water Temperature - Continuous

National Water Information System - 7

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 six program locations, monthly average water temperature increased between 0.03 and 0.06°C per year. No detectable change in monthly average water temperature was observed at four locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
255123081321300 No detectable trend 1818 8 2007 - 2017 27.3 0.1 26.46 0.03 0.38
255138081321701 No detectable trend 3093 10 2017 - 2026 27.0 0.01 26.94 0 0.97
255432081303900 Increasing trend 6615 20 2006 - 2026 27.0 0.17 26.23 0.05 0
255443081314700 Insufficient data 2011 4 2007 - 2011 29.3 - - - -
255532081314300 Insufficient data 906 3 2009 - 2011 29.3 - - - -
255534081324000 Increasing trend 6313 19 2007 - 2026 26.6 0.13 25.67 0.03 0.01
255654081350200 Increasing trend 6310 19 2007 - 2026 26.7 0.11 26.41 0.03 0.03
255732081363700 No detectable trend 1435 5 2011 - 2015 28.4 0.24 27.3 0.23 0.11
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.

Rookery Bay National Estuarine Research Reserve System-Wide Monitoring Program - 354

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 six program locations, monthly average water temperature increased between 0.03 and 0.06°C per year. No detectable change in monthly average water temperature was observed at four locations. There was insufficient data to fit a model for two locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
rkbfbwq Increasing trend 727557 25 2002 - 2026 27.0 0.22 26.26 0.04 0.00
rkbfuwq Increasing trend 736040 25 2002 - 2026 26.9 0.26 26.08 0.06 0.00
rkbmbwq Increasing trend 770564 27 2000 - 2026 26.8 0.24 26.09 0.04 0.00
rkbpbwq No detectable trend 346335 11 2016 - 2026 27.3 0.05 27.12 0.02 0.53
Map showing location of water temperature continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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 0.02°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 11375 43 1956 - 2025 26.8 0.09271 26.08235 0.01805 0.0056
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 decreased by less than 0.01 pH units per year. No detectable change in monthly average pH 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
rkbfbwq No detectable trend 679220 25 2002 - 2026 7.8 0.04 7.83 0 0.36
rkbfuwq No detectable trend 697654 25 2002 - 2026 7.7 0.01 7.73 0 0.88
rkbmbwq Decreasing trend 735914 27 2000 - 2026 7.7 -0.10 7.70 0 0.01
rkbpbwq No detectable trend 332136 11 2016 - 2026 7.8 0.10 7.80 0 0.19
Map showing location of ph continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 Cape Romano-Ten Thousand Islands 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:

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 4301 36 1956 - 2025 7.9 -0.23696 8.18343 -0.00802 0
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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 two program locations, monthly average specific conductivity increased by 0.32 mS/cm per year at one site and by 0.35 mS/cm per year at the other. At one program location, monthly average specific conductivity decreased by 0.07 mS/cm per year. No detectable change in monthly average specific conductivity was observed at six locations.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
255123081321300 No detectable trend 1295 6 2010 - 2017 49.10 -0.20 53.63 -1.03 0.20
255138081321701 Increasing trend 3074 10 2017 - 2026 48.70 0.21 45.21 0.35 0.01
255432081303900 No detectable trend 5600 17 2010 - 2026 34.90 0.00 31.28 0.01 0.98
255534081324000 No detectable trend 5597 17 2010 - 2026 48.80 0.06 48.14 0.11 0.24
255654081350200 No detectable trend 5635 17 2010 - 2026 48.80 0.04 47.21 0.05 0.43
rkbfbwq No detectable trend 711718 25 2002 - 2026 46.24 0.05 47.30 0.06 0.20
rkbfuwq No detectable trend 725511 25 2002 - 2026 41.45 0.03 43.06 0.04 0.51
rkbmbwq Decreasing trend 744660 27 2000 - 2026 50.93 -0.09 52.43 -0.07 0.03
rkbpbwq Increasing trend 341625 11 2016 - 2026 47.30 0.16 45.74 0.32 0.02
Map showing location of specific conductivity continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 four program locations, monthly average turbidity decreased between 0.08 and 0.36 NTU per year.

Program Location Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
rkbfbwq Decreasing trend 691451 25 2002 - 2026 7 -0.39 11.21 -0.23 0
rkbfuwq Decreasing trend 664104 25 2002 - 2026 6 -0.19 8.57 -0.08 0
rkbmbwq Decreasing trend 722768 27 2000 - 2026 9 -0.23 12.72 -0.13 0
rkbpbwq Decreasing trend 339797 11 2016 - 2026 10 -0.29 13.23 -0.36 0
Map showing location of turbidity continuous water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. 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 0.08 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 4677 31 1989 - 2025 4 0.15654 4.59643 0.07792 0.0005
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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:

Total suspended solids showed no detectable trend between 1989 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 500 17 1989 - 2025 10 -0.01172 10.83431 -0.00554 0.842
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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:

Monthly average chlorophyll a, uncorrected for pheophytin, increased by 0.07 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 2188 29 1994 - 2025 3.66293 0.27318 3.27391 0.07359 0
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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 2002 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 655 15 2002 - 2025 3.8 0.08519 3.09688 0.04286 0.1675
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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:

There was insufficient data to fit a model for Secchi depth.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Field Insufficient data 220 9 2001 - 2025 -0.9 - - - -
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands 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:

There was insufficient data to fit a model for colored dissolved organic matter.

Activity Type Statistical Trend Sample Count Years with Data Period of Record Median Result Value Tau Sen Intercept Sen Slope P
Lab Insufficient data 8 1 2001 - 2001 13 - - - -
Map showing location of discrete water quality sampling locations within the boundaries of Cape Romano-Ten Thousand Islands 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 Cape Romano-Ten Thousand Islands Aquatic Preserve. The bubble size on the maps above reflect the amount of data available at each sampling site.