Disinfection byproducts · 2023
TTHM in Las Vegas, NV tap water
Las Vegas, NV's 2023 TTHM level is between 80% and 100% of the federal limit (80 ug/L MCL) — measured but not in violation.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Minimum Las Vegas Valley Water District Distribution System | 1 ug/L | 80 ug/L MCL |
Maximum Las Vegas Valley Water District Distribution System | 90 ug/L | 80 ug/L MCL |
Average Las Vegas Valley Water District Distribution System | 77 ug/L | 80 ug/L MCL |
Verbatim from Las Vegas, NV's 2023 Consumer Confidence Report — source document ↗
About TTHM
Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.
Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
People also ask
+Is there TTHM in Las Vegas, NV tap water?
Yes — Las Vegas, NV's 2023 Consumer Confidence Report lists TTHM at 77 ug/L. Las Vegas, NV's 2023 TTHM level is between 80% and 100% of the federal limit (80 ug/L MCL) — measured but not in violation.
+What's the federal limit for TTHM in drinking water?
The federal MCL for TTHM is 80 ug/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is TTHM?
Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
+Where does this TTHM measurement come from?
This page reproduces the TTHM entry from the 2023 Consumer Confidence Report published by the Las Vegas, NV 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/nv/las-vegas/2023/source.