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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 |
Pentachlorophenol by state
Every state where a public water system reports Pentachlorophenol in its annual report, ranked by systems at or above the federal limit.
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.
+Which states report the most Pentachlorophenol in their drinking water?
Of the systems on The Water Map, California (1 system at or above the limit), Alabama (1 system at or above the limit) report the most Pentachlorophenol exceedances. The state-by-state table on this page lists every state.
+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.