The state has posted maps showing water systems with lead or potential lead service lines from 99 percent of Ohio's 1,878 water systems.

Maps and other information on those water systems are available online here. Information was released today by the Ohio Environmental Protection Agency.

Operators of water systems were required to submit maps by Thursday to comply with EPA regulations informing the public about potential lead content in drinking water, much of it coming from older lead pipes.

All but 18 water systems in the state complied with the state order.

The city of Columbus released its lead map earlier this week.

Questions about the maps of water systems, which are listed alphabetically, should be directed to the individual water system operators listed on the interactive maps.

Health officials have found that lead triggers potentially serious health problems when ingested in large quantities from water or other sources. It can damage the brain and kidneys; young children and pregnant women face the highest risk from exposure to lead.