Disinfection byproducts
Dibromochloromethane in U.S. tap water
55 public water systems across 12 U.S. states report Dibromochloromethane in their annual Consumer Confidence Report. 1 sit at or above the federal limit.
What it is
A trihalomethane disinfection byproduct.
Why it's regulated
Part of regulated total trihalomethanes; long-term exposure is linked to nervous-system, liver, and kidney effects.
At or above the federal limit (1)
| Water system | Measured | vs. limit |
|---|---|---|
| Pomona, CA 2024 annual report | 0–10 ug/L | 10.0× the limit |
Within the federal limit (12)
| Water system | Measured |
|---|---|
| Georgetown, TX 2024 annual report | 15.2 ug/L |
| Austin, TX 2024 annual report | 10.3 ug/L |
| Beaver Run Mhp, MD 2024 annual report | 0.0045–0.01242 mg/L |
| Dallas, TX 2024 annual report | 4.9 ug/L |
| Lewisville, TX 2024 annual report | 4.07 ug/L |
| Chestertown, MD 2024 annual report | 0.004 mg/L |
| Fort Worth, TX 2024 annual report | 2.91 ug/L |
| Birmingham, AL 2024 annual report | 2 |
| Gaither Manor Apartments, MD 2024 annual report | 0.00118 mg/L |
| Beaches Water, MD 2024 annual report | 0–0.00096 mg/L |
| Charleston, SC 2024 annual report | 2.6 ug/L |
| North Charleston, SC 2024 annual report | 2.6 ug/L |
Frequently asked
+What is Dibromochloromethane?
A trihalomethane disinfection byproduct. Part of regulated total trihalomethanes; long-term exposure is linked to nervous-system, liver, and kidney effects.
+What is the federal limit for Dibromochloromethane in drinking water?
The federal MCLG for Dibromochloromethane is 60 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 Dibromochloromethane over the federal limit?
1 of the 55 public water systems on The Water Map report Dibromochloromethane at or above its federal limit, spanning 12 U.S. states. The full list is on this page.
+How can I check if Dibromochloromethane 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 Dibromochloromethane.