
Below 15, the level that requires action
3 public water companies list Merrimac as a place they supply. The biggest is Merrimac Waterworks, with about 440 people. The highest latest result among Merrimac's water companies is 1.1 parts per billion, at Merrimac Waterworks. None of the 3 with results was above 15 at its latest test. 1 found too little lead to measure.