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A 2007 toxicity report for the National Toxicology Program provided evidence that high doses of chromium 6 caused cancers of the gastrointestinal tract in rats and mice at levels higher than 5 mg/L of water, (5 ppm, or 5,000 ppb). [41] [42] Average hexavalent chromium levels in Hinkley were recorded at 1.19 ppb, with an estimated peak of 20 ppb.
On August 22, 2020, Visa News's article "Martin County, Kentucky’s Water Crisis Isn’t Over. But It Has Changed." provided the most up-to-date summary of the crisis, encompassing not only the progress in water quality issues, but the rising problem of water affordability and the ongoing political issues surrounding the water crisis. [17]
An example of this chemical causing adverse health issues is through a well-known hexavalent chromium (chromium 6) pollution event in Hinkley, California. Groundwater contamination in Hinkley was caused by water containing hexavalent chromium being dumped on the ground by Pacific Gas and Electric (PG&E) from 1952 to 1966. PG&E used this ...
The 2019 and 2021 tests detected PFAS chemicals at Kentucky American’s Richmond Road plant, which draws water from the Jacobson Reservoir, at levels below 4 ppt. Kentucky American is evaluating ...
Multiple water systems are also under boil water advisories. Beshear cautioned that it could take months to restore some systems that have seen significant damage. ‘You can’t do anything’
[6]: 8 Only by controlling the land uses of their public water source can a community control the quality of the water they drink. [6]: 7–8 The U.S. Geological Survey aquifer sampling also frequently detected contaminants for which the U.S. Environmental Protection Agency has not yet established human health standards.
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The waste water was discharged to unlined ponds at the site, and some of the waste water percolated into the groundwater, affecting an area of approximately 2 square miles (5.2 km 2) near the plant. [12] The Regional Water Quality Control Board (RWQCB) put the PG&E site under its regulations in 1968.