Metals
Chromium, Hexavalent in U.S. tap water
366 public water systems across 6 U.S. states report Chromium, Hexavalent in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
What it is
Hexavalent chromium ('chromium-6') — the more toxic form of chromium.
Why it's regulated
A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.
Within the federal limit (26)
Frequently asked
+What is Chromium, Hexavalent?
Hexavalent chromium ('chromium-6') — the more toxic form of chromium. A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.
+What is the federal limit for Chromium, Hexavalent in drinking water?
The federal Public health goal for Chromium, Hexavalent is 0.02 ug/L. The EPA enforces this against the regulated reporting statistic (typically a running annual average or 90th percentile), not a single-sample spike.
+How many U.S. water systems have Chromium, Hexavalent over the federal limit?
Zero of the 366 public water systems in The Water Map dataset currently report Chromium, Hexavalent at or above its federal limit.
+How can I check if Chromium, Hexavalent is in my city's tap water?
Search your city on The Water Map (https://www.thewatermap.com/) or browse the list on this page. Every U.S. public water utility is required to publish an annual Consumer Confidence Report that lists every contaminant it measured, including Chromium, Hexavalent.