
Below 15, the level that requires action
2 public water companies list Joppa as a place they supply. The biggest is Fort Massac PWD, with about 6,360 people. The highest latest result among Joppa's water companies is 1.3 parts per billion, at Fort Massac PWD. None of the 2 with results was above 15 at its latest test. 1 found too little lead to measure.