VOCs & pesticides
Chloromethane in U.S. tap water
3 public water systems across 3 U.S. states report Chloromethane in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
Within the federal limit (2)
| Water system | Measured |
|---|---|
| Cleveland, OH 2024 annual report | Not detected |
| Nashville, TN 2023 annual report | Not detected |
Chloromethane by state
Every state where a public water system reports Chloromethane in its annual report, ranked by systems at or above the federal limit.
| State | Measuring | Over limit | Highest reading |
|---|---|---|---|
| Ohio | 1 | 0 | Not detected · Cleveland, OH |
| Tennessee | 1 | 0 | Not detected · Nashville, TN |
| Maryland | 1 | 0 | 1.26 ug/L · Bradford Estates, MD |
Frequently asked
+What is Chloromethane?
Chloromethane is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+Does Chloromethane have a federal limit in drinking water?
Chloromethane does not have an enforceable federal MCL. Utilities still report any measured levels in their annual Consumer Confidence Report.
+How many U.S. water systems have Chloromethane over the federal limit?
Zero of the 3 public water systems in The Water Map dataset currently report Chloromethane at or above its federal limit.
+Which states report the most Chloromethane in their drinking water?
No state currently has a system reporting Chloromethane at or above its federal limit in The Water Map dataset. Ohio, Tennessee, Maryland have the most systems measuring it.
+How can I check if Chloromethane 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 Chloromethane.