Disinfection byproducts · 2021
TTHM in Walnut Valley Water District — Walnut, Ca, CA tap water
Walnut Valley Water District — Walnut, Ca, CA's 2021 TTHM measurement is below the federal limit.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Metropolitan Water District of Southern California | 29 ug/L | None set |
Range Three Valleys Municipal Water District (Miramar Plant Effluent) | 31.3–40 ug/L | None set |
Range Metropolitan Water District of Southern California | 21–32 ug/L | None set |
Reported level Walnut Valley Water District | 20.14 ug/L | None set |
Range Walnut Valley Water District | 13.8–26.3 ug/L | None set |
Reported level Three Valleys Municipal Water District (Miramar Plant Effluent) | 34.39 ug/L | None set |
Verbatim from Walnut Valley Water District — Walnut, Ca, CA's 2021 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.
How Walnut Valley Water District — Walnut, Ca, CA compares
5 of the 1176 systems measuring TTHM on The Water Map have it at or above the federal limit:
Nearby systems also reporting TTHM:
People also ask
+Is there TTHM in Walnut Valley Water District — Walnut, Ca, CA tap water?
Yes — Walnut Valley Water District — Walnut, Ca, CA's 2021 Consumer Confidence Report lists TTHM at 31.3–40 ug/L. Walnut Valley Water District — Walnut, Ca, CA's 2021 TTHM measurement is below the federal limit.
+What's the federal limit for TTHM in drinking water?
The EPA has not set an enforceable federal limit for TTHM. Utilities still report any measured levels in their annual Consumer Confidence Report.
+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.
+Which other U.S. cities have TTHM over the federal limit?
5 of the 1176 systems on The Water Map measuring TTHM report it at or above the federal limit. Examples include Calexico, City of — Calexico, Ca, CA, White Fence Farms Mwc No.3 — Lancaster, Ca, CA, Greensboro, NC.
+Where does this TTHM measurement come from?
This page reproduces the TTHM entry from the 2021 Consumer Confidence Report published by the Walnut Valley Water District — Walnut, 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/walnut-valley-water-district-walnut-ca/2021/source.