Lake Tahoe’s water clarity improved in 2018 mainly due to a typical winter season and water flow on rivers and streams, according to a new study.
The annual report by UC Davis researchers found the average clarity level in 2018 was 70.9 feet, a 10.5-foot increase from 2017. Two years ago clarity had dropped to a record low, partially due to record-breaking precipitation and unusually warm lake temperatures.
Scientists measure clarity by lowering a 10-inch white disk into the water and noting the depth at which it become invisible. They took 26 readings from January through December in 2018.