According to a new study from the University of Michigan, the number of lead or galvanized steel service lines needing replacement has doubled to 29,100.

In a news release from the city it states "the latest number is based on inspections of service lines leading to 159 homes using a Hydrovac to flush dirt from around the pipes near the curb." The release goes on to say that "based on the results, the study estimates about 52 percent of the total number of service lines leading to 55,000 parcels in the City of Flint need replacing."

Flint Mayor Karen Weaver says the findings make it "even more imperative that the state and federal government step up to pay" for replacing the service lines. She continued that "even though by using filters many are able to drink the water, the lead and galvanized steel service lines still must be replaced so Flint residents don't have to worry about lead-tainted water coming into their homes through no fault of their own."

Participants in the study, funded by Google, included assistant professors and graduate students at U of M, someone assisting with Weaver's Fast Start Initiative, and someone from the Michigan Department of Transportation. The study also took into consideration what crews found replacing lines to nearly 300 homes earlier this year.

Mayor Weaver was set to discuss the study more at a news conference Friday morning.