The latest Elfin Lake water test result from July 13, 2022 showed just 1 E.coli/100mL.
From the state Dept of Health website regarding recreational water testing:
What does the EColi test result mean?
E. coli in water is measured as the number of Bacteria found in 100 milliliters (mL) of water.
In Vermont, when the test result at a public Swimming area is 235 E.coli/100mL or less, it means that the water is considered suitable for swimming. A result greater than 235 E.)coli/100 mL means that the water is not considered suitable for swimming.