The Hannibal Board of Public Works has released the results of the 2015 tests for lead and copper in the city’s water supply.

In a press release, BPW reports tests for lead and copper concentration were both well below the maximum level allowed by the Missouri Department of Natural Resources.

After testing 30 different samples, the average lead level was 3.12 parts per billion. The maximum level allowed is 15 parts per billion. The average copper level is 46.5 parts per billion, compared to a maximum allowable level of 1,300 parts per billion.

State and federal agencies require testing every three years. According to BPW General Manager Bob Stevenson, the city has done monthly testing since the water treatment plant switched disinfection systems last October.