VOCs & pesticides
DBCP in U.S. tap water
11 public water systems across 6 U.S. states report DBCP in their annual Consumer Confidence Report. None currently sit at or above the federal limit.
What it is
1,2-dibromo-3-chloropropane — a banned soil fumigant pesticide.
Why it's regulated
A probable human carcinogen; long-term exposure above the federal limit can cause reproductive harm.
Within the federal limit (10)
| Water system | Measured |
|---|---|
| Pomona, CA 2024 annual report | 0–49 ng/L |
| Mesa, AZ 2024 annual report | 24 ng/L |
| Clovis, CA 2024 annual report | 22.5 ng/L |
| Rancho Cucamonga, CA 2024 annual report | 5.6 ng/L |
| Ontario, CA 2024 annual report | 0.27 ng/L |
| High Point, NC 2024 annual report | Not detected ng/L |
| Mobile, AL 2024 annual report | Not detected |
| Montgomery, AL 2024 annual report | Not detected |
| Plano, TX 2024 annual report | 0–0 ng/L |
| Visalia, CA 2024 annual report | Not detected ng/L |
Frequently asked
+What is DBCP?
1,2-dibromo-3-chloropropane — a banned soil fumigant pesticide. A probable human carcinogen; long-term exposure above the federal limit can cause reproductive harm.
+What is the federal limit for DBCP in drinking water?
The federal MCL for DBCP is 200 ng/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 DBCP over the federal limit?
Zero of the 11 public water systems in The Water Map dataset currently report DBCP at or above its federal limit.
+How can I check if DBCP 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 DBCP.