Atmos Energy started looking for gas leaks after an explosion killed a 12-year-old girl in Northwest Dallas earlier this year, putting residents all over Dallas on edge.

According to data analyzed by The Dallas Morning News, there has been a concentration of gas leaks in the Preston Hollow Area. The first half of 2018 had 40 gas leaks—more than past two years combined.

Dallas News’ reports found a cluster of leaks near Preston Hollow Elementary School.

The problem comes from old pipes that have failed to be replaced. Atmos Energy states by 2021 these older pipes will no longer be in use. They have also pledged to fix 292 miles of pipes by the end of this year. Atmos plans to fund this through an increase in costumer’s rates as well as a federal tax break.

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