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Pentachlorophenol in U.S. tap water
30 public water systems across 9 U.S. states report Pentachlorophenol in their annual Consumer Confidence Report. 2 sit at or above the federal limit.
At or above the federal limit (2)
| Water system | Measured | vs. limit |
|---|---|---|
| Montgomery, AL 2024 annual report | 0.04 mg/L | 40.0× the limit |
| Delano, City of — Delano, Ca, CA 2023 annual report | 1 ug/L | 1.0× the limit |
Within the federal limit (28)
| Water system | Measured |
|---|---|
| Chandler, AZ 2024 annual report | 0.12 ug/L |
| Bend, OR 2025 annual report | 0.1 ug/L |
| City of Hialeah, FL 2023 annual report | 0–0.038 ug/L |
| City of North Miami Beach, FL 2023 annual report | 0–0.038 ug/L |
| Miami Dade, FL 2023 annual report | 0–0.038 ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2023 annual report | Not detected ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2020 annual report | Not detected ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2021 annual report | Not detected ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2022 annual report | Not detected ug/L |
| Boron Csd — Boron, Ca, CA 2022 annual report | Not detected ug/L |
| City of Rio Vista — Rio Vista, Ca, CA 2022 annual report | Not detected ug/L |
| Columbus, OH 2025 annual report | Not detected mg/L |
| Foothill Municipal Water Dist. — La Canada Flintridge, Ca, CA 2023 annual report | Not detected ug/L |
| Garland, TX 2024 annual report | 0–0 ug/L |
| High Point, NC 2024 annual report | Not detected ug/L |
| Mobile, AL 2024 annual report | Not detected ug/L |
| Mojave Pud — Mojave, Ca, CA 2023 annual report | Not detected ug/L |
| Nashville, TN 2023 annual report | Not detected mg/L |
| Plano, TX 2024 annual report | 0–0 ug/L |
| Three Valleys MWD — Claremont, Ca, CA 2023 annual report | Not detected ug/L |
| Westside Park Mutual Water — Palmdale, Ca, CA 2023 annual report | Not detected ug/L |
| White Fence Farms Mwc No. 1 — Palmdale, Ca, CA 2021 annual report | Not detected ug/L |
| White Fence Farms Mwc No. 1 — Palmdale, Ca, CA 2023 annual report | Not detected ug/L |
| White Fence Farms Mwc No. 1 — Palmdale, Ca, CA 2020 annual report | Not detected ug/L |
| White Fence Farms Mwc No.3 — Lancaster, Ca, CA 2023 annual report | Not detected ug/L |
| White Fence Farms Mwc No.3 — Lancaster, Ca, CA 2020 annual report | Not detected ug/L |
| White Fence Farms Mwc No.3 — Lancaster, Ca, CA 2021 annual report | Not detected ug/L |
| White Fence Farms Mwc No.3 — Lancaster, Ca, CA 2022 annual report | Not detected ug/L |
Frequently asked
+What is Pentachlorophenol?
Pentachlorophenol is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Pentachlorophenol in drinking water?
The federal MCL for Pentachlorophenol is 0.001 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 Pentachlorophenol over the federal limit?
2 of the 30 public water systems on The Water Map report Pentachlorophenol at or above its federal limit, spanning 9 U.S. states. The full list is on this page.
+How can I check if Pentachlorophenol 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 Pentachlorophenol.