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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.
Groundwater pollution (also called groundwater contamination) occurs when pollutants are released to the ground and make their way into groundwater.This type of water pollution can also occur naturally due to the presence of a minor and unwanted constituent, contaminant, or impurity in the groundwater, in which case it is more likely referred to as contamination rather than pollution.
Over half of the U.S. population relies on groundwater for drinking water [1] However, residential, municipal, commercial, industrial, and agricultural activities can all contaminate groundwater. [2]: C-2 In the event of contamination, a community's drinking water supply can develop poor quality or be lost altogether. Groundwater contamination ...
A map released Tuesday in the journal Nature offers the first comprehensive map of the world’s underground water sources and the ecosystems that depend on them. In…
Notable buildings include the Orlean Farm House (c. 1795), Smith-Hinkley House (c. 1830), the Anderson-Rector House and Store (c. 1870), the Greek Revival style Thorpe-Cornwell House, Jeffries Store (1885), Orlean Methodist Church (1881-1883), Providence Baptist Church (1883), and Orlean post office building (1956).
The right-leaning group Virginia Project said the crisis may be the reason for the legislature to take an immediate interest in infrastructure funding, before offering a Confederate-era suggestion:
President-elect Donald Trump said Tuesday that NATO member countries “were taking advantage” of the U.S. and should be paying more than double what they currently are required to pay for their ...
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 ...