
Below 15, the level that requires action
6 public water companies list Miami as a place they supply. The biggest is Mdwasa - Main, with about 2,377,460 people. The highest latest result among Miami's water companies is 3.1 parts per billion, at Mdwasa - Main. None of the 6 with results was above 15 at its latest test. 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.