Links to Designated List CAS#: 7440-50-8CA MCLswww.waterboards.ca.gov/drinking_water/certlic/drinkingwater/Lawbook.htmlCA Non-Cancer Hazardsoehha.ca.gov/air/general-info/oehha-acute-8-hour-and-chronic-reference-exposure-level-rel-summaryCA Priority Pollutantswww.govinfo.gov/content/pkg/CFR-2010-title40-vol21/pdf/CFR-2010-title40-vol21-sec131-38.pdf