Incline Creek comes in second.
The phosphorus concentration in the Upper Truckee River at the south end of the lake is less than one-fourth that of Third Creek. Upper Truckee River flows are some 12 times that of Third Creek. So, total phosphorus loads are more than three times as great. And for the algae-stimulating phosphate, the Upper Truckee contributes almost six times as much as Third Creek. He did his research with the UC-Davis Tahoe Research Group.