
Below 15, the level that requires action
6 public water companies list Rolla as a place they supply. The biggest is Rolla's water department, with about 20,800 people. The highest latest result among Rolla's water companies is 3.9 parts per billion, at Rolla's water department. None of the 6 with results was above 15 at its latest test. 3 found too little lead to measure. 3 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.