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For canal reporting on Sanibel Island, please visit Sanibel Clean Canals
2025 Ranking of Concern 14 out of 39
Water Quality Grade 2025
D
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Sanibel Communities for Clean Water > Communities

The Sanctuary: Lake 7

26.49135, -82.17098

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Data Summary
Nutrients
2025 2024 2023
IN 0.0580.160.023
TN 1.552.692.03
OP 0.0830.0480.131
TP 0.240.240.17
Chl-a 34.774.4151.5
TSI 76.884.176.5
Salinity 8.32.112.5
DO 7.68.210.3

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The most recent samples from The Sanctuary: Lake 7 were taken in 2025, where it ranked 14 out of 39 sites tested that year. In this dataset, a ranking of 1 represents the most impaired site, while 39 represents the least impaired.

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BMPs (Best Management Practices) implemented at The Sanctuary: Lake 7:

No BMPs have been reported at this location yet.

. . . . . = State Criteria: measurements above this line suggest impairment to the waterbody.
Historical Data
Rankings
  • 2025 Ranking: 14 out of 39 sites tested
  • 2024 Ranking: 14 out of 46 sites tested
  • 2023 Ranking: 8 out of 23 sites tested
  • 2022 Ranking: 12 out of 84 sites tested
  • 2020 Ranking: 9 out of 84 sites tested
  • 2018 Ranking: 24 out of 78 sites tested
  • 2016 Ranking: 8 out of 78 sites tested
Water Quality Grade
  • 2025 Grade: D
  • 2024 Grade: F
  • 2023 Grade: D
  • 2022 Grade: C
  • 2020 Grade: F
  • 2018 Grade: F
  • 2016 Grade: F
Most Impaired - Top 5
Least Impaired - Top 5
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