VOCs & pesticides
Dichlorodifluoromethane in U.S. tap water
16 public water systems across 2 U.S. states report Dichlorodifluoromethane in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
Within the federal limit (5)
| Water system | Measured |
|---|---|
| Cleveland, OH 2024 annual report | Not detected |
| Covina Irrigating Co. — West Covina, Ca, CA 2023 annual report | Not detected ug/L |
| Covina Irrigating Co. — West Covina, Ca, CA 2020 annual report | Not detected ug/L |
| Covina Irrigating Co. — West Covina, Ca, CA 2021 annual report | Not detected ug/L |
| Foothill Municipal Water Dist. — La Canada Flintridge, Ca, CA 2023 annual report | Not detected ug/L |
Dichlorodifluoromethane by state
Every state where a public water system reports Dichlorodifluoromethane in its annual report, ranked by systems at or above the federal limit.
| State | Measuring | Over limit | Highest reading |
|---|---|---|---|
| California | 15 | 0 | Not detected ug/L · Covina Irrigating Co. — West Covina, Ca, CA |
| Ohio | 1 | 0 | Not detected · Cleveland, OH |
Frequently asked
+What is Dichlorodifluoromethane?
Dichlorodifluoromethane is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Dichlorodifluoromethane in drinking water?
The federal NL for Dichlorodifluoromethane is 1000 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 Dichlorodifluoromethane over the federal limit?
Zero of the 16 public water systems in The Water Map dataset currently report Dichlorodifluoromethane at or above its federal limit.
+Which states report the most Dichlorodifluoromethane in their drinking water?
No state currently has a system reporting Dichlorodifluoromethane at or above its federal limit in The Water Map dataset. California, Ohio have the most systems measuring it.
+How can I check if Dichlorodifluoromethane 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 Dichlorodifluoromethane.