Inorganic chemicals
Bromide in U.S. tap water
38 public water systems across 11 U.S. states report Bromide in their annual Consumer Confidence Report. 2 sit at or above the federal limit.
What it is
A naturally occurring salt found in source water.
Why it's regulated
Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.
At or above the federal limit (2)
| Water system | Measured | vs. limit |
|---|---|---|
| Kansas City, KS 2024 annual report | 58 ug/L | 11.6× the limit |
| Columbia, MO 2024 annual report | 0.0688 mg/L | 1.4× the limit |
Frequently asked
+What is Bromide?
A naturally occurring salt found in source water. Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.
+What is the federal limit for Bromide in drinking water?
The federal MCL for Bromide is 0.05 mg/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 Bromide over the federal limit?
2 of the 38 public water systems on The Water Map report Bromide at or above its federal limit, spanning 11 U.S. states. The full list is on this page.
+How can I check if Bromide 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 Bromide.