Disinfection byproducts · 2024
HAA5 in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2024 HAA5 measurement is below the federal limit of 60 UG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Entry point | 12 UG/L | 60 UG/L MCL |
Average Entry point | 9.483333333333334 UG/L | 60 UG/L MCL |
Highest single sample Distribution | 23.9 UG/L | 60 UG/L MCL |
Average Distribution | 10.602916666666667 UG/L | 60 UG/L MCL |
Verbatim from Contra Costa Water District, CA's 2024 Consumer Confidence Report — source document ↗
About HAA5
Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.
Long-term exposure above the federal limit is associated with an increased cancer risk.
How Contra Costa Water District, CA compares
5 of the 348 systems measuring HAA5 on The Water Map have it at or above the federal limit:
Nearby systems also reporting HAA5:
People also ask
+Is there HAA5 in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2024 Consumer Confidence Report lists HAA5 at 10.602916666666667 UG/L. Contra Costa Water District, CA's 2024 HAA5 measurement is below the federal limit of 60 UG/L (MCL).
+What's the federal limit for HAA5 in drinking water?
The federal MCL for HAA5 is 60 UG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is HAA5?
Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. Long-term exposure above the federal limit is associated with an increased cancer risk.
+Which other U.S. cities have HAA5 over the federal limit?
5 of the 348 systems on The Water Map measuring HAA5 report it at or above the federal limit. Examples include Albuquerque, NM, City of Hialeah, FL, City of North Miami Beach, FL.
+Where does this HAA5 measurement come from?
This page reproduces the HAA5 entry from the 2024 Consumer Confidence Report published by the Contra Costa Water District, CA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/ca/contra-costa-water-district/2024/source.