8646-R1_NewGloucester_2022-2023_AnnualReport_Web

2023 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 ........................................................................................................................................... 7 Chemical Parameters ............................................................................................................................... 8 Color.......................................................................................................................................................... 8 Alkalinity .................................................................................................................................................. 8 pH............................................................................................................................................................... 9 SUMMARY .......................................................................................................................... 9 Recommendations ................................................................................................................................. 10 RESOURCES FOR WATERSHED RESIDENTS ..................................................................11 REFERENCES .....................................................................................................................11

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