TAMPA, Fla. -- The Hillsborough County School District is testing for lead in the water at its schools. 

Crews are taking water samples at 270 schools across the district. Officials said a total of more than 9,000 samples will be taken.

So far, about 50 schools have been tested and 26 areas of concern have been identified. Specific problem areas have been kitchen sinks, bathroom sinks and backflow pipes.  

The Environmental Protection Agency recommends that lead levels over 20 parts per billion be corrected in schools. As a precaution, we will address issues where samples test at 15 parts per billion or higher. One part per billion is equivalent to a single drop of water in 55,000 gallons.

"We have hundreds of dedicated employees who work hard to maintain our schools," the school district said in an online release. "But our average campus age is 50 years old, and older pipes and fixtures do have a higher likelihood of adding lead to water."

School officials said those areas of concern will be shut down and fixed.

The district hopes to have all school campuses tested by next year. 

Here is a full list of the schools tested and results. 

If you have health concerns related to the testing, contact your health care provider or the Florida Department of Health in Hillsborough County at (813) 307-8000.