8984-R2_NewGloucester_2023-2024_AnnualReport_Web

2024 Sabbathday Lake Water Quality Report

TABLE OF CONTENTS COMMONLY USED TERMS...............................................................................................III BACKGROUND & PURPOSE.............................................................................................. 1 METHODS ........................................................................................................................... 2 RESULTS .............................................................................................................................. 2 Weather & Climate Change .................................................................................................................. 2 Trophic State Indicators ......................................................................................................................... 3 Water Clarity ............................................................................................................................................................ 3 Total Phosphorus................................................................................................................................................... 4 Chlorophyll a ........................................................................................................................................................... 5 Dissolved Oxygen & Temperature ..................................................................................................... 6 Dissolved Oxygen .................................................................................................................................................. 7 Temperature ............................................................................................................................................................ 8 Chemical Parameters ............................................................................................................................... 8 Color ........................................................................................................................................................................... 8 Alkalinity .................................................................................................................................................................. 9 pH ................................................................................................................................................................................ 9 PLANKTON COMMUNITY...................................................................................................................... 9 Phytoplankton ..................................................................................................................................................... 10 SUMMARY ........................................................................................................................12 Recommendations ................................................................................................................................. 13 RESOURCES FOR WATERSHED RESIDENTS ..................................................................13 REFERENCES .....................................................................................................................14 APPENDIX A- 2024 PHYTOPLANKTON RESULTS.........................................................15

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