Oak Ridge, TN (WOKI) Several Oak Ridge residents can expect a letter from the city telling them they could have been exposed to lead through drinking water service lines.

The city says crews conducted a service line survey and found that “many properties” have lines made out of “an unknown material” which means people could have been exposed to lead.

Service lines connect water mains to building inlets. Oak Ridge’s service line is owned in part by the city and in part by the owner of the property it services. City officials say the unknown material was found in both portions of the service line.

If you get the notice, you are being asked to fill out a survey to help crews identify what material the line is made of. Please go to oak ridge tn dot gov and search lead exposure.