Beach Water Quality Summary 2018—Beach water quality is
highly correlated to river flow. During periods of high flow, turbidity
increases, and with it come high levels of bacteria from runoff and from what
may be stored in the silt deposits within the lake itself.
for e-coli bacteria, an indicator bacteria for exposure to human or animal
waste, was done weekly during the swimming season. Out of 16 tests, there were
five episodes of high bacteria levels at Boulder Beach, four at Shady, and
eight at Sunset. Tests showing 235 or more bacterial colonies per sample
resulted in posting the beaches—“Swimming Not Recommended due to a test that
resulted in high bacteria counts.” All but one high bacteria tests at each
beach were attributed to turbid waters caused by rain.
Toxin levels never went above 1% of the danger level of 20
parts per billion (ppb.) Toxin tests were taken in the very worst
“slimy/stinky/scum” conditions that could be found which should have the most
toxins, if present.