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2025 Ranking of Concern 7 out of 39
Water Quality Grade 2025
F
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Sanibel Communities for Clean Water > Communities

Periwinkle Park: Duck Pond

26.44338, -82.04332

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Data Summary
Nutrients
2025 2022 2020
IN 0.0520.0180.09
TN 2.152.842.29
OP 0.0080.0620.052
TP 0.160.130.19
Chl-a 108.527.564.3
TSI 8276.382.3
Salinity 121.83.4
DO 8.14.755

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The most recent samples from Periwinkle Park: Duck Pond were taken in 2025, where it ranked 7 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 Periwinkle Park: Duck Pond:

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: 7 out of 39 sites tested
  • 2024 Ranking: Not tested
  • 2023 Ranking: Not tested
  • 2022 Ranking: 28 out of 84 sites tested
  • 2020 Ranking: 21 out of 84 sites tested
  • 2018 Ranking: 16 out of 78 sites tested
  • 2016 Ranking: 4 out of 78 sites tested
Water Quality Grade
  • 2025 Grade: F
  • 2024 Grade: Not tested
  • 2023 Grade: Not tested
  • 2022 Grade: D
  • 2020 Grade: F
  • 2018 Grade: F
  • 2016 Grade: F
Most Impaired - Top 5
Least Impaired - Top 5
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