EPA Increases National Maximum Contaminant Level (MCL) from 15 to 56 ppb (micrograms/liter) for Perchlorate in Drinking Water
By Roger McLassus - Picture taken and uploaded by Roger McLassus., CC BY-SA 3.0, Link
EPA Issues Final Action for Perchlorate in Drinking Water
(News Release, U. S. EPA; June 18, 2020)
https://www.epa.gov/newsreleases/epa-issues-final-action-perchlorate-drinking-water
EPA Blows Up Court Order Over Rocket Fuel Contaminant in Drinking Water
(Press Release, NRDC; June 18, 2020)
https://www.nrdc.org/media/2020/200618-0
Publications:
Technical Fact Sheet - Perchlorate
(U. S. EPA; January 2014)
https://www.epa.gov/sites/production/files/2014-03/documents/ffrrofactsheet_contaminant_perchlorate_january2014_final.pdf
Understanding Units of Measurement
(Terri K. BOGUSKI, 2006)
https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.files/fileid/14285
Website:
Perchlorate
[Human and Ecological Risk Office (HERO) - California Department of Toxic Substances Control]
https://dtsc.ca.gov/perchlorate/
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