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Chromium in U.S. tap water
292 public water systems across 27 U.S. states report Chromium in their annual Consumer Confidence Report. 5 sit at or above the federal limit.
At or above the federal limit (5)
| Water system | Measured | vs. limit |
|---|---|---|
| Usmc - 29 Palms — Twentynine Palms, Ca, CA 2023 annual report | 0.65 mg/L | 6.5× the limit |
| Salt Lake City, UT 2024 annual report | 0.4 mg/L | 4.0× the limit |
| Azusa Light and Water — Azusa, Ca, CA 2022 annual report | 0.13 mg/L | 1.3× the limit |
| Frisco, TX 2024 annual report | 100 ug/L | 1.0× the limit |
| Norman, OK 2024 annual report | 100 ug/L | 1.0× the limit |
Approaching the limit (1)
| Water system | Measured | vs. limit |
|---|---|---|
| Phoenix, AZ 2025 annual report | 0–87 ug/L | 0.9× the limit |
Within the federal limit (284)
Showing 50 of 284. The full list is in the JSON API.
Chromium by state
Every state where a public water system reports Chromium in its annual report, ranked by systems at or above the federal limit.
Frequently asked
+What is Chromium?
Chromium is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Chromium in drinking water?
The federal MCL for Chromium is 100 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 Chromium over the federal limit?
5 of the 292 public water systems on The Water Map report Chromium at or above its federal limit, spanning 27 U.S. states. The full list is on this page.
+Which states report the most Chromium in their drinking water?
Of the systems on The Water Map, California (2 systems at or above the limit), Texas (1 system at or above the limit), Utah (1 system at or above the limit) report the most Chromium exceedances. The state-by-state table on this page lists every state.
+How can I check if Chromium 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 Chromium.