Disinfection byproducts · 2024
TTHM in Des Moines, IA tap water
Des Moines, IA's 2024 report shows TTHM detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level SE Polk Rural Water** | 74 | None set |
Reported level Earlham | 49 | None set |
Reported level New Virginia | 59 | None set |
Reported level Des Moines* | 68–84 | None set |
Reported level Johnston | 34–76 | None set |
Reported level Bondurant | 42–61 | None set |
Reported level Clive | 57–71 | None set |
Reported level Waukee | 66 | None set |
Reported level Warren Water District | 62 | None set |
Reported level Johnston | 55 | None set |
Reported level Urbandale | 72 | None set |
Reported level Clive | 64 | None set |
Reported level East Dallas Water | 34–47 | None set |
Reported level Warren Water District | 50–74 | None set |
Reported level Ankeny | 26–73 | None set |
Reported level Bondurant | 54 | None set |
Reported level Norwalk | 69 | None set |
Reported level East Dallas Water | 41 | None set |
Reported level Des Moines* | 77 | None set |
Reported level Urbandale | 59–99 | None set |
Reported level Norwalk | 59–78 | None set |
Reported level New Virginia | 54–70 | None set |
Reported level SE Polk Rural Water** | 64–83 | None set |
Reported level Ankeny | 57 | None set |
Reported level Waukee | 53–83 | None set |
Verbatim from Des Moines, IA's 2024 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 Des Moines, IA 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 Des Moines, IA tap water?
Yes — Des Moines, IA's 2024 Consumer Confidence Report lists TTHM at 59–99. Des Moines, IA's 2024 report shows TTHM detected, but the EPA has not set an enforceable federal limit for it.
+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 2024 Consumer Confidence Report published by the Des Moines, IA 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/ia/des-moines/2024/source.