The issues concerning Flint's water problems are well documented in the FlintWaterStudy.org, which is a website published and maintained by Virginia Tech researchers who are involved in studying Flint's drinking water. The Flint Journal has also followed this issue very closely.
Flint's return to DWSD is expected to take 2 weeks to complete. However, this will only be a temporary measure as Flint is committed to joining the Karegnondi Water Authroty (KWA), which is still constructing its new 63 mile raw water intake pipe. KWA's pipeline project is still slated for completion some time in 2016. Once completed, Flint will receive raw water from Lake Huron, which it still must process through its own water treatment plant. Water from DWSD is already purified potable (drinking) water.
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