
Below 15, the level that requires action
9 public water companies list Belgrade as a place they supply. The biggest is Belgrade's water department, with about 10,460 people. The highest latest result among Belgrade's water companies is 2.8 parts per billion, at the River Rock County Water and Sewer District. None of the 9 with results was above 15 at its latest test. 7 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.