8331_NewGloucester_2021-2022_AnnualReport_Web

2022 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, 2011-2022. ....................................................................................................................................................... 3 Figure 3. Average annual water clarity for Sabbathday Lake, Station 1 (1975-2022).. ....... 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. 2022 dissolved oxygen profiles for Sabbathday Lake, Station 1.............................. 7 LIST OF TABLES Table 1. Average annual water clarity for Sabbathday Lake at Station 1 (1975-2022)....... 3 Table 2. Average annual TP for Sabbathday Lake, Station 1 (1982-2022). ............................. 5 Table 3. Average annual Chl-a for Sabbathday Lake, Station 1 (1975-2022)......................... 5 Table 4. Average annual color for Sabbathday Lake, Station 1 (1982-2022). ........................ 8 Table 5. Average annual alkalinity monitoring results for Sabbathday Lake, Station 1 (1982-2022). .................................................................................................................................................... 8 Table 6. Average annual pH for Sabbathday Lake, Station 1 (1982-2022). ............................ 9 Table 7. Summary of 2022 data and historical averages for water clarity, total phosphorus (TP), chlorophyll a (Chl-a), color, alkalinity, and pH at Sabbathday Lake.. ............................. 10

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