By ISMAIL TURAY JR. | Dayton Daily News, Ohio | Published: April 5, 2021 DAYTON, Ohio (Tribune News Service) — The city of Dayton intends to file a lawsuit against Wright-Patterson Air Force Base and the U.S. Department of Defense in what it says is an effort to reduce contamination coming from the base into the city's drinking water supply. The city recently informed Wright-Patt and the DoD in a formal letter that it will file the lawsuit within 60 days, unless the base takes immediate action to mitigate the contaminants flowing into the Mad River wellfield by May 4, according to a news release. The wellfield is one of several that Dayton uses to supply drinking water to more than 400,000 customers in Dayton and Montgomery County.