Metals
Nickel in U.S. tap water
109 public water systems across 22 U.S. states report Nickel in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
What it is
A metal from natural deposits and industrial discharge.
Why it's regulated
Long-term exposure can cause skin and other effects; monitored under EPA rules.
Within the federal limit (38)
Nickel by state
Every state where a public water system reports Nickel in its annual report, ranked by systems at or above the federal limit.
Frequently asked
+What is Nickel?
A metal from natural deposits and industrial discharge. Long-term exposure can cause skin and other effects; monitored under EPA rules.
+What is the federal limit for Nickel in drinking water?
The federal Public health goal for Nickel is 12 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 Nickel over the federal limit?
Zero of the 109 public water systems in The Water Map dataset currently report Nickel at or above its federal limit.
+Which states report the most Nickel in their drinking water?
No state currently has a system reporting Nickel at or above its federal limit in The Water Map dataset. California, Maryland, Indiana have the most systems measuring it.
+How can I check if Nickel 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 Nickel.