Disinfection byproducts · 2023
HAA5 in City of Redwood City — Redwood City, Ca, CA tap water
City of Redwood City — Redwood City, Ca, CA's 2023 HAA5 measurement is below the federal limit of 60 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range or Level Found | 31.9–37.5 ug/L | 60 ug/L MCL |
Average System-wide | 34.75 ug/L | 60 ug/L MCL |
Range or Level Found | 12–39 ug/L | 60 ug/L MCL |
Average System-wide | 30.61 ug/L | 60 ug/L MCL |
Verbatim from City of Redwood City — Redwood City, Ca, CA's 2023 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 City of Redwood City — Redwood City, Ca, CA compares
2 of the 241 CA 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 City of Redwood City — Redwood City, Ca, CA tap water?
Yes — City of Redwood City — Redwood City, Ca, CA's 2023 Consumer Confidence Report lists HAA5 at 34.75 ug/L. City of Redwood City — Redwood City, Ca, CA's 2023 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?
2 of the 241 CA systems on The Water Map measuring HAA5 report it at or above the federal limit. Examples include Sweetwater Authority — Chula Vista, Ca, CA, St. Helena, City of — St. Helena, Ca, CA.
+Where does this HAA5 measurement come from?
This page reproduces the HAA5 entry from the 2023 Consumer Confidence Report published by the City of Redwood City — Redwood City, Ca, 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/redwood-city-redwood-city-ca/2023/source.