Lakes / Lake Sampson Lake Sampson algae history from satellite We read Lake Sampson from 384 cloud-free satellite scenes between Feb 14, 2016 – Sep 19, 2026. Here is what the surface water showed.
Clear scenes 384
Typical (median), index 35
Highest reading 153 · Jun 23, 2026
Latest scene 80 · Sep 19, 2026 Algae signal (red-edge index) over time 0 50 100 150 200 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Feb 14, 2016: 17 index (low) May 14, 2016: 21 index (low) Jun 23, 2016: 53 index (low) Jul 13, 2016: 32 index (low) Aug 2, 2016: 40 index (low) Aug 22, 2016: 32 index (low) Sep 11, 2016: 21 index (low) Oct 1, 2016: 18 index (low) Oct 21, 2016: 22 index (low) Nov 10, 2016: 20 index (low) Nov 20, 2016: 10 index (low) Dec 30, 2016: 12 index (low) Jan 29, 2017: 11 index (low) Mar 30, 2017: 14 index (low) Apr 19, 2017: 38 index (low) May 9, 2017: 24 index (low) May 29, 2017: 39 index (low) Jun 18, 2017: 42 index (low) Aug 17, 2017: 24 index (low) Sep 21, 2017: 21 index (low) Sep 26, 2017: 8.5 index (low) Oct 31, 2017: -0.5 index (low) Nov 20, 2017: 0.5 index (low) Nov 25, 2017: 3.5 index (low) Nov 30, 2017: 2 index (low) Dec 10, 2017: 3 index (low) Dec 20, 2017: 15 index (low) Jan 4, 2018: 18 index (low) Jan 9, 2018: 8 index (low) Jan 19, 2018: 9 index (low) Jan 24, 2018: 12 index (low) Feb 18, 2018: 29 index (low) Feb 23, 2018: 25 index (low) Mar 5, 2018: 13 index (low) Mar 15, 2018: 14 index (low) Mar 25, 2018: 40 index (low) Apr 4, 2018: 44 index (low) Apr 14, 2018: 42 index (low) Apr 19, 2018: 48 index (low) Apr 24, 2018: 37 index (low) Apr 29, 2018: 38 index (low) May 4, 2018: 45 index (low) May 9, 2018: 33 index (low) May 19, 2018: -394 index (low) Jun 13, 2018: 43 index (low) Jun 18, 2018: 31 index (low) Jun 23, 2018: 48 index (low) Jun 28, 2018: 57 index (low) Jul 13, 2018: 34 index (low) Jul 28, 2018: 35 index (low) Aug 2, 2018: 47 index (low) Aug 7, 2018: 26 index (low) Aug 17, 2018: 37 index (low) Aug 27, 2018: 39 index (low) Sep 1, 2018: 52 index (low) Sep 6, 2018: 49 index (low) Sep 11, 2018: 35 index (low) Sep 16, 2018: 45 index (low) Sep 21, 2018: 42 index (low) Sep 26, 2018: 47 index (low) Oct 6, 2018: 45 index (low) Oct 16, 2018: 39 index (low) Oct 21, 2018: 31 index (low) Oct 31, 2018: 25 index (low) Dec 15, 2018: 42 index (low) Dec 25, 2018: 28 index (low) Jan 9, 2019: 5 index (low) Jan 24, 2019: 38 index (low) Feb 8, 2019: 33 index (low) Feb 18, 2019: 44 index (low) Feb 28, 2019: 44 index (low) Mar 10, 2019: 40 index (low) Mar 15, 2019: 46 index (low) Mar 20, 2019: 42 index (low) Mar 25, 2019: 39 index (low) Mar 30, 2019: 54 index (high) Apr 4, 2019: 51 index (low) Apr 9, 2019: 53 index (low) May 9, 2019: 84 index (low) May 19, 2019: 49 index (low) May 24, 2019: 48 index (low) May 29, 2019: 61 index (low) Jun 18, 2019: 91 index (high) Jun 23, 2019: 93 index (low) Jul 8, 2019: 82 index (high) Jul 23, 2019: 79 index (low) Aug 12, 2019: 75 index (high) Aug 22, 2019: 60 index (high) Aug 27, 2019: 73 index (high) Sep 1, 2019: 126 index (low) Sep 6, 2019: 62 index (high) Sep 11, 2019: 57 index (low) Sep 16, 2019: 63 index (high) Sep 21, 2019: 74 index (low) Oct 1, 2019: 67 index (low) Oct 11, 2019: 30 index (low) Oct 26, 2019: 46 index (low) Nov 10, 2019: 20 index (low) Nov 20, 2019: 14 index (low) Nov 25, 2019: 15 index (low) Nov 30, 2019: 23 index (low) Dec 5, 2019: 15 index (low) Dec 10, 2019: 23 index (low) Dec 15, 2019: 24 index (low) Dec 25, 2019: 24 index (low) Jan 9, 2020: 25 index (low) Jan 24, 2020: 28 index (low) Feb 3, 2020: 25 index (low) Feb 8, 2020: 38 index (low) Feb 13, 2020: 44 index (low) Feb 23, 2020: 41 index (low) Feb 28, 2020: 35 index (low) Mar 9, 2020: 37 index (low) Mar 14, 2020: 25 index (low) Mar 19, 2020: 31 index (low) Mar 29, 2020: 32 index (low) Apr 3, 2020: 30 index (low) Apr 28, 2020: 30 index (low) May 3, 2020: 29 index (low) May 8, 2020: 39 index (low) May 13, 2020: 73 index (low) May 23, 2020: 54 index (high) Jun 17, 2020: 41 index (low) Jun 22, 2020: 30 index (low) Jul 12, 2020: 35 index (low) Jul 17, 2020: 51 index (high) Jul 22, 2020: 57 index (low) Jul 27, 2020: 52 index (low) Aug 1, 2020: 47 index (low) Aug 26, 2020: 41 index (low) Sep 5, 2020: 27 index (low) Sep 25, 2020: 27 index (low) Sep 30, 2020: 15 index (low) Oct 10, 2020: 25 index (low) Oct 25, 2020: 31 index (low) Oct 30, 2020: 17 index (low) Nov 4, 2020: 21 index (low) Nov 14, 2020: 20 index (low) Nov 24, 2020: 20 index (low) Dec 9, 2020: 14 index (low) Dec 19, 2020: 23 index (low) Dec 29, 2020: 12 index (low) Jan 18, 2021: 13 index (low) Jan 28, 2021: 18 index (low) Feb 2, 2021: 24 index (low) Feb 22, 2021: 16 index (low) Feb 27, 2021: 13 index (low) Mar 4, 2021: 12 index (low) Mar 9, 2021: 15 index (low) Mar 14, 2021: 19 index (low) Mar 19, 2021: 16 index (low) Mar 24, 2021: 15 index (low) Apr 3, 2021: 18 index (low) Apr 8, 2021: 20 index (low) Apr 13, 2021: 15 index (low) Apr 23, 2021: 30 index (low) May 3, 2021: 59 index (high) May 8, 2021: 66 index (high) May 23, 2021: 47 index (low) May 28, 2021: 51 index (low) Jun 12, 2021: 87 index (low) Jun 17, 2021: 67 index (low) Jun 27, 2021: 75 index (low) Jul 12, 2021: 36 index (low) Jul 17, 2021: 27 index (low) Jul 22, 2021: 40 index (low) Aug 11, 2021: 31 index (low) Aug 21, 2021: 42 index (low) Sep 10, 2021: 39 index (low) Sep 15, 2021: 38 index (low) Sep 25, 2021: 26 index (low) Oct 10, 2021: 21 index (low) Oct 15, 2021: 26 index (low) Oct 20, 2021: 25 index (low) Oct 30, 2021: 22 index (low) Nov 9, 2021: 28 index (low) Nov 14, 2021: 29 index (low) Nov 19, 2021: 24 index (low) Nov 24, 2021: 35 index (low) Nov 29, 2021: 20 index (low) Dec 24, 2021: 26 index (low) Dec 29, 2021: 35 index (low) Jan 3, 2022: 41 index (low) Jan 8, 2022: 40 index (low) Jan 13, 2022: 53 index (high) Jan 18, 2022: 43 index (low) Feb 22, 2022: 42 index (low) Mar 4, 2022: 38 index (low) Mar 29, 2022: 36 index (low) Apr 3, 2022: 32 index (low) Apr 8, 2022: 35 index (low) Apr 23, 2022: 74 index (low) Apr 28, 2022: 33 index (low) May 3, 2022: 88 index (low) May 8, 2022: 36 index (low) May 13, 2022: 50 index (low) May 18, 2022: 35 index (low) May 28, 2022: 70 index (low) Jun 2, 2022: 50 index (low) Jun 7, 2022: 47 index (low) Jul 2, 2022: 92 index (high) Jul 12, 2022: 113 index (high) Jul 17, 2022: 114 index (high) Jul 22, 2022: 101 index (high) Aug 1, 2022: 121 index (high) Aug 16, 2022: 123 index (high) Aug 21, 2022: 131 index (high) Sep 15, 2022: 41 index (low) Sep 20, 2022: 37 index (low) Sep 25, 2022: 38 index (low) Oct 5, 2022: 23 index (low) Oct 10, 2022: 27 index (low) Oct 15, 2022: 27 index (low) Oct 20, 2022: 27 index (low) Oct 25, 2022: 28 index (low) Nov 4, 2022: 38 index (low) Nov 14, 2022: 32 index (low) Nov 29, 2022: 25 index (low) Dec 4, 2022: 37 index (low) Dec 9, 2022: 25 index (low) Dec 14, 2022: 30 index (low) Dec 19, 2022: 20 index (low) Dec 24, 2022: 18 index (low) Dec 29, 2022: 15 index (low) Jan 8, 2023: 19 index (low) Jan 13, 2023: 28 index (low) Jan 28, 2023: 22 index (low) Feb 7, 2023: 23 index (low) Feb 17, 2023: 37 index (low) Feb 22, 2023: 25 index (low) Feb 27, 2023: 34 index (low) Mar 9, 2023: 23 index (low) Mar 14, 2023: 21 index (low) Mar 19, 2023: 30 index (low) Mar 24, 2023: 25 index (low) Mar 29, 2023: 30 index (low) Apr 13, 2023: 54 index (low) Apr 18, 2023: 30 index (low) May 3, 2023: 36 index (low) May 8, 2023: 38 index (low) May 13, 2023: 40 index (low) May 28, 2023: 47 index (low) Jun 17, 2023: 51 index (low) Jun 27, 2023: 88 index (low) Jul 2, 2023: 58 index (low) Jul 7, 2023: 115 index (high) Jul 12, 2023: 91 index (high) Jul 22, 2023: 78 index (low) Jul 27, 2023: 56 index (high) Aug 6, 2023: 48 index (low) Aug 21, 2023: 61 index (low) Aug 26, 2023: 44 index (low) Aug 31, 2023: 50 index (low) Sep 15, 2023: 44 index (low) Sep 20, 2023: 29 index (low) Oct 5, 2023: 37 index (low) Oct 15, 2023: 28 index (low) Oct 20, 2023: 29 index (low) Oct 25, 2023: 36 index (low) Oct 30, 2023: 29 index (low) Nov 4, 2023: 37 index (low) Nov 19, 2023: 25 index (low) Nov 29, 2023: 16 index (low) Dec 9, 2023: 17 index (low) Dec 19, 2023: 22 index (low) Dec 29, 2023: 12 index (low) Jan 3, 2024: 9.8 index (low) Jan 28, 2024: 17 index (low) Feb 2, 2024: 22 index (low) Feb 7, 2024: 17 index (low) Feb 22, 2024: 14 index (low) Feb 27, 2024: 18 index (low) Mar 3, 2024: 30 index (low) Mar 13, 2024: 18 index (low) Mar 23, 2024: 33 index (low) Apr 7, 2024: 19 index (low) Apr 12, 2024: 36 index (low) Apr 22, 2024: 44 index (low) May 2, 2024: 34 index (low) May 7, 2024: 60 index (low) May 27, 2024: 53 index (low) Jun 6, 2024: 49 index (low) Jun 16, 2024: 60 index (high) Jun 21, 2024: 62 index (low) Jun 26, 2024: 75 index (high) Jul 6, 2024: 58 index (high) Jul 16, 2024: 64 index (high) Jul 21, 2024: 57 index (high) Jul 26, 2024: 56 index (high) Aug 10, 2024: 44 index (low) Aug 20, 2024: 39 index (low) Aug 25, 2024: 37 index (low) Sep 24, 2024: 22 index (low) Oct 4, 2024: 38 index (low) Oct 14, 2024: 18 index (low) Oct 24, 2024: 19 index (low) Nov 3, 2024: 24 index (low) Nov 13, 2024: 17 index (low) Nov 23, 2024: 14 index (low) Dec 3, 2024: 12 index (low) Dec 13, 2024: 18 index (low) Jan 2, 2025: 12 index (low) Jan 12, 2025: 12 index (low) Jan 17, 2025: 11 index (low) Jan 27, 2025: 3 index (low) Feb 1, 2025: 17 index (low) Feb 6, 2025: 8 index (low) Feb 21, 2025: 13 index (low) Feb 26, 2025: 3.5 index (low) Mar 3, 2025: 6.5 index (low) Mar 13, 2025: 30 index (low) Mar 18, 2025: 44 index (low) Mar 23, 2025: 110 index (high) Mar 28, 2025: 48 index (low) Apr 2, 2025: 62 index (high) Apr 12, 2025: 65 index (high) Apr 17, 2025: 30 index (low) Apr 27, 2025: 31 index (low) May 7, 2025: 50 index (low) May 17, 2025: 38 index (low) May 22, 2025: 20 index (low) May 27, 2025: 20 index (low) Jun 1, 2025: 41 index (low) Jun 6, 2025: 51 index (low) Jun 16, 2025: 40 index (low) Jun 21, 2025: 35 index (low) Jun 26, 2025: 35 index (low) Jul 6, 2025: 36 index (low) Jul 11, 2025: 56 index (high) Jul 16, 2025: 57 index (low) Jul 21, 2025: 72 index (high) Jul 26, 2025: 30 index (low) Jul 28, 2025: 33 index (low) Jul 31, 2025: 44 index (low) Aug 10, 2025: 61 index (high) Aug 15, 2025: 49 index (low) Aug 20, 2025: 49 index (low) Sep 4, 2025: 24 index (low) Sep 6, 2025: 37 index (low) Sep 14, 2025: 35 index (low) Sep 19, 2025: 36 index (low) Sep 24, 2025: 21 index (low) Oct 14, 2025: 15 index (low) Oct 16, 2025: 21 index (low) Oct 24, 2025: 12 index (low) Oct 29, 2025: 41 index (low) Nov 3, 2025: 14 index (low) Nov 5, 2025: 24 index (low) Nov 13, 2025: 14 index (low) Nov 18, 2025: 21 index (low) Nov 23, 2025: 12 index (low) Nov 25, 2025: 25 index (low) Nov 28, 2025: 18 index (low) Dec 15, 2025: 26 index (low) Dec 23, 2025: 14 index (low) Dec 28, 2025: 23 index (low) Jan 7, 2026: 43 index (low) Jan 17, 2026: 24 index (low) Jan 22, 2026: 8.5 index (low) Jan 27, 2026: 26 index (low) Feb 1, 2026: 23 index (low) Feb 6, 2026: 22 index (low) Feb 21, 2026: 23 index (low) Feb 26, 2026: 39 index (low) Mar 3, 2026: 24 index (low) Mar 13, 2026: 36 index (low) Mar 18, 2026: 46 index (low) Apr 4, 2026: 44 index (low) Apr 12, 2026: 24 index (low) Apr 17, 2026: 31 index (low) Apr 24, 2026: 51 index (high) May 7, 2026: 41 index (low) May 14, 2026: 55 index (low) May 17, 2026: 97 index (high) Jun 3, 2026: 68 index (low) Jun 6, 2026: 63 index (low) Jun 11, 2026: 50 index (low) Jun 23, 2026: 153 index (high) Jul 11, 2026: 71 index (high) Aug 5, 2026: 107 index (high) Aug 20, 2026: 83 index (high) Aug 30, 2026: 89 index (high) Sep 4, 2026: 76 index (high) Sep 19, 2026: 80 index (high) Algae signal (red-edge index), index. One dot per cloud-free scene; dates are local to the lake. When it peaks Month Clear scenes Median, index Scenes rated high Jan 28 18 4% Feb 31 24 0% Mar 36 30 6% Apr 31 36 10% May 37 47 11% Jun 30 51 13% Jul 33 57 48% Aug 30 48 33% Sep 33 38 12% Oct 34 27 0% Nov 33 20 0% Dec 28 21 0%
By year (median / highest): 2016: 21 / 53 (12 scenes) · 2017: 14 / 42 (15 scenes) · 2018: 37 / 57 (39 scenes) · 2019: 48 / 126 (39 scenes) · 2020: 30 / 73 (37 scenes) · 2021: 26 / 87 (40 scenes) · 2022: 38 / 131 (42 scenes) · 2023: 35 / 115 (42 scenes) · 2024: 33 / 75 (35 scenes) · 2025: 30 / 110 (55 scenes) · 2026: 45 / 153 (28 scenes).
What a satellite can and can’t tell you Satellites see only the surface layer, only on cloud-free days, and only away from the shoreline. They estimate algae; they do not measure toxins, and they can’t see what the lake bottom is doing. A clear reading is not a safety clearance.
For current conditions and health advisories, check the Florida DEP algal bloom page and the Florida Department of Health . If a person or pet may have been exposed to a bloom, call a doctor, a veterinarian, or Poison Help at 1-800-222-1222.
Source: Sentinel-2 MSI (ESA Copernicus), Red-edge cyanobacteria index (CI-cyano); a scene counts as a bloom when the index is above 50 and stays high relative to turbidity (bloom rule v1 (2026-10)). Snapshot exported Oct 9, 2026.
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