8984-R2_NewGloucester_2023-2024_AnnualReport_Web

2024 Sabbathday Lake Water Quality Report

LIST OF FIGURES Figure 1. Sabbathday Lake bathymetric map showing deep hole sampling location (Station 1). ................................................................................................................................................................................. ii Figure 2. Total and monthly precipitation for Sabbathday Lake from May-September, 2014 2024. ........................................................................................................................................................................... 3 Figure 3. Average annual water clarity for Sabbathday Lake, Station 1 (1975-2024). ................ 4 Figure 4. Average annual water quality data for trophic state indicators (water clarity, total phosphorus (TP), and Chlorophyll-a (Chl-a)) for Sabbathday Lake, Station 1. ............................... 6 Figure 5. 2024 temperature profiles for Sabbathday Lake, Station 1. .............................................. 7 Figure 6 . 2024 dissolved oxygen profiles for Sabbathday Lake, Station 1. ..................................... 7 Figure 7. Phytoplankton density for Sabbathday Lake, 2024.............................................................11 Figure 8. Phytoplankton biomass for Sabbathday Lake, 2024. .........................................................11 LIST OF TABLES Table 1. Average annual water clarity for Sabbathday Lake at Station 1 (1975-2024)............... 4 Table 2. Average Annual TP for Sabbathday Lake, Station 1 (1982-2024)...................................... 5 Table 3. Average Annual Chl-a monitoring for Sabbathday Lake, Station 1 (1975-2024). ....... 6 Table 4. Average annual color for Sabbathday Lake, Station 1 (1982-2024). ................................ 8 Table 5. Average annual alkalinity for Sabbathday Lake, Station 1 (1982-2024).......................... 9 Table 6. Average annual pH for Sabbathday Lake, Station 1 (1982-2024). .................................... 9 Table 7. Summary of 2024 data and historical averages for water clarity, total phosphorus (TP), chlorophyll a (Chl-a), color, alkalinity, and pH at Sabbathday Lake........................................12

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