PFAS ("forever chemicals")
Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) in U.S. tap water
17 public water systems across 5 U.S. states report Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
See the PFAS Hotspots leaderboard → — every U.S. water system over EPA's finalized PFAS limit, ranked by severity, from the 2023–2025 UCMR5 lab dataset.
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.
Within the federal limit (16)
| Water system | Measured |
|---|---|
| Boonsboro Keedysville, MD 2024 annual report | Not detected ng/L |
| Chesapeake, VA 2023 annual report | Not detected ng/L |
| City of Mountain House — Mountain House, Ca, CA 2023 annual report | Not detected |
| Cotati, City of — Cotati, Ca, CA 2023 annual report | Not detected ng/L |
| Dearborn, MI 2024 annual report | Not detected ng/L |
| East Valley Water District — Highland, Ca, CA 2023 annual report | Not detected ng/L |
| Fallbrook Pud — Fallbrook, Ca, CA 2023 annual report | Not detected ng/L |
| Fillmore Water Dept — Fillmore, Ca, CA 2023 annual report | Not detected ng/L |
| Foothill Municipal Water Dist. — La Canada Flintridge, Ca, CA 2023 annual report | Not detected ng/L |
| Los Angeles Cwwd 36-val Verde — Alhambra, Ca, CA 2023 annual report | Not detected ng/L |
| Paradise Ranch Mhp — Beverly Hills, Ca, CA 2023 annual report | Not detected ng/L |
| Pasadena, CA 2023 annual report | Not detected ng/L |
| Santa Clarita, CA 2024 annual report | Not detected ng/L |
| South Tahoe Pud - Main — South Lake Tahoe, Ca, CA 2023 annual report | Not detected ng/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 NL for Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) is 0.003 . 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?
Zero of the 17 public water systems in The Water Map dataset currently report Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) at or above its federal limit.
+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
Color-coded by status across the whole country.
Open the map →