
Below 15, the level that requires action
4 public water companies list Black River Falls as a place they supply. The biggest is Black River Falls Waterworks, with about 3,608 people. The highest latest result among Black River Falls's water companies is 4.8 parts per billion, at Black River Correctional Center. None of the 4 with results was above 15 at its latest test. 1 found too little lead to measure.