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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.
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.
+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.