PFAS ("forever chemicals")
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) in U.S. tap water
8 public water systems across 6 U.S. states report Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) in their annual Consumer Confidence Report. 1 sit at or above the federal limit.
What it is
Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound.
Why it's regulated
Monitored under EPA rules as part of broad PFAS surveillance.
At or above the federal limit (1)
| Water system | Measured | vs. limit |
|---|---|---|
| Boonsboro Keedysville, MD 2024 annual report | 113507–7 | 2.3× the limit |
Within the federal limit (6)
| Water system | Measured |
|---|---|
| Dallas, TX 2024 annual report | Not detected ng/L |
| Dearborn, MI 2024 annual report | Not detected ug/L |
| Pasadena, CA 2023 annual report | Not detected ug/L |
| Santa Clarita, CA 2024 annual report | Not detected ug/L |
| Tracy, CA 2024 annual report | Not detected |
| Wilmington, NC 2024 annual report | Not detected ng/L |
Frequently asked
+What is Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)?
Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. Monitored under EPA rules as part of broad PFAS surveillance.
+What is the federal limit for Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) in drinking water?
The federal MCL for Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) is 3 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 Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) over the federal limit?
1 of the 8 public water systems on The Water Map report Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) at or above its federal limit, spanning 6 U.S. states. The full list is on this page.
+How can I check if Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) 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 Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA).
See Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) on the map
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