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Trichloroethane 111 in U.S. tap water
12 public water systems across 7 U.S. states report Trichloroethane 111 in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
Within the federal limit (12)
| Water system | Measured |
|---|---|
| Rockford, IL 2024 annual report | 0.59 ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2020 annual report | Not detected mg/L |
| City of Cupertino, CA 2024 annual report | Not detected ug/L |
| Columbus, OH 2025 annual report | Not detected mg/L |
| Garland, TX 2024 annual report | 0–0 ug/L |
| High Point, NC 2024 annual report | Not detected ug/L |
| Montgomery, AL 2024 annual report | Not detected mg/L |
| Nashville, TN 2023 annual report | Not detected mg/L |
| Pomona, CA 2024 annual report | Not detected ug/L |
| San Jose, CA 2024 annual report | Not detected ug/L |
| San Jose Water — San Jose, Ca, CA 2021 annual report | Not detected ug/L |
| Westside Park Mutual Water — Palmdale, Ca, CA 2023 annual report | Not detected ug/L |
Frequently asked
+What is Trichloroethane 111?
Trichloroethane 111 is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Trichloroethane 111 in drinking water?
The federal MCL for Trichloroethane 111 is 0.2 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 Trichloroethane 111 over the federal limit?
Zero of the 12 public water systems in The Water Map dataset currently report Trichloroethane 111 at or above its federal limit.
+How can I check if Trichloroethane 111 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 Trichloroethane 111.