(Hour 2b) 
We were joined this morning by Cheryl Wood and Philip Croasdale of the Manchester Water Works. They talked to Rich about about water issues. They talked about maintaining protection around the main source of water. They discussed lead in the piping, treating the water and more. Tune in to hear about it.
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Ah, sorry honey, pretty sure hexavalent chromium is not natural at all. that is what the movie with Erin Brockovich was about!
https://en.wikipedia.org/wiki/Hexavalent_chromium
https://en.wikipedia.org/wiki/Hinkley_groundwater_contamination
The presence of Strontium (a naturally occurring element), Vanadium (a naturally occurring element) and Chromium-6 (a naturally occurring element) was slight. Detection limits were in micrograms/liter. According to the Environmental Protection Agency (EPA)
https://www.epa.gov/sites/production/files/2015-10/documents/ucmr3_factsheet_list1.pdf
Another source also confirms that it can be naturally occurring
http://www.pnas.org/content/104/16/6544.full
And according to the American Water Works Association (AWWA) “Chromium is a metallic element found in rocks, soils, plants, and animals.”
http://www.awwa.org/Portals/0/files/legreg/documents/UpdatedChromiumInDrinkingWaterSummaryFinal.pdf
In the science community, Wikipedia is not considered a reliable or credible source. When discussing water related issues and regulations, always check with the experts…EPA, AWWA, Water Research Foundation or even the CDC, to learn the latest and most reliable facts.