Hexavalent Chromium: Four Regulatory Regimes That Must Not Be Confused — page updateshttps://heavymetalcertified.com/articles/hexavalent-chromium-four-regimesPublished revisions of this Heavy Metal Certified page.Hexavalent Chromium: Four Regulatory Regimes That Must Not Be Confusedhttps://heavymetalcertified.com/articles/hexavalent-chromium-four-regimeshttps://heavymetalcertified.com/articles/hexavalent-chromium-four-regimes#revision-d101152dcd199dbbFri, 02 Oct 2026 21:00:41 GMTCalifornia water, Australian guidance, OSHA workplace rules and ECHA's proposed REACH restriction govern Cr(VI) in four non-interchangeable ways.