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Hexachlorobenzene in U.S. tap water
23 public water systems across 4 U.S. states report Hexachlorobenzene in their annual Consumer Confidence Report. 1 sit at or above the federal limit.
At or above the federal limit (1)
| Water system | Measured | vs. limit |
|---|---|---|
| Delano, City of — Delano, Ca, CA 2023 annual report | 1 ug/L | 1.0× the limit |
Within the federal limit (22)
Hexachlorobenzene by state
Every state where a public water system reports Hexachlorobenzene in its annual report, ranked by systems at or above the federal limit.
| State | Measuring | Over limit | Highest reading |
|---|---|---|---|
| California | 18 | 1 | 1 ug/L · Delano, City of — Delano, Ca, CA |
| Texas | 2 | 0 | 0–0 ug/L · Garland, TX |
| Alabama | 2 | 0 | Not detected ug/L · Mobile, AL |
| North Carolina | 1 | 0 | Not detected ug/L · High Point, NC |
Frequently asked
+What is Hexachlorobenzene?
Hexachlorobenzene is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Hexachlorobenzene in drinking water?
The federal MCLG for Hexachlorobenzene is 0 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 Hexachlorobenzene over the federal limit?
1 of the 23 public water systems on The Water Map report Hexachlorobenzene at or above its federal limit, spanning 4 U.S. states. The full list is on this page.
+Which states report the most Hexachlorobenzene in their drinking water?
Of the systems on The Water Map, California (1 system at or above the limit) report the most Hexachlorobenzene exceedances. The state-by-state table on this page lists every state.
+How can I check if Hexachlorobenzene 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 Hexachlorobenzene.