Disinfection byproducts · 2024
HAA5 in Charleston, SC tap water
Charleston, SC's 2024 HAA5 measurement is below the federal limit of 60 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average Distribution Water | 12.19 ug/L | 60 ug/L MCL |
Range Distribution Water | 8.14–18.44 ug/L | 60 ug/L MCL |
Average Distribution Water | 17.28 ug/L | 60 ug/L MCL |
Range Distribution Water | 12.25–25.86 ug/L | 60 ug/L MCL |
Verbatim from Charleston, SC'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 Charleston, SC compares
1 of the 3 SC 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 Charleston, SC tap water?
Yes — Charleston, SC's 2024 Consumer Confidence Report lists HAA5 at 17.28 ug/L. Charleston, SC'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?
1 of the 3 SC systems on The Water Map measuring HAA5 report it at or above the federal limit. Examples include Columbia, SC.
+Where does this HAA5 measurement come from?
This page reproduces the HAA5 entry from the 2024 Consumer Confidence Report published by the Charleston, SC 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/sc/charleston/2024/source.