Disinfection byproducts · 2024
TTHM in Chula Vista Sweetwater, CA tap water
Chula Vista Sweetwater, CA's 2024 TTHM measurement is below the federal limit of 80 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average System-wide | 33.6 ug/L | 80 ug/L MCL |
Range System-wide | 14.5–55.7 ug/L | 80 ug/L MCL |
Running annual avg System-wide | 39.7 ug/L | 80 ug/L MCL |
Reported level Treated1 Sweetwater Authority Drinking Water | 53.4 ug/L | 80 ug/L MCL |
Reported level Treated1 Sweetwater Authority Drinking Water | 4.6–85.46 ug/L | 80 ug/L MCL |
Verbatim from Chula Vista Sweetwater, CA'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 Chula Vista Sweetwater, CA compares
4 of the 251 CA 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 Chula Vista Sweetwater, CA tap water?
Yes — Chula Vista Sweetwater, CA's 2024 Consumer Confidence Report lists TTHM at 39.7 ug/L. Chula Vista Sweetwater, CA's 2024 TTHM measurement is below the federal limit of 80 ug/L (MCL).
+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.
+Which other U.S. cities have TTHM over the federal limit?
4 of the 251 CA systems on The Water Map measuring TTHM report it at or above the federal limit. Examples include Suisun-solano Water Authority — Vacaville, Ca, CA, Sweetwater Authority — Chula Vista, Ca, CA, Crestline Village Cwd - Division 10 — Crestline, Ca, CA.
+Where does this TTHM measurement come from?
This page reproduces the TTHM entry from the 2024 Consumer Confidence Report published by the Chula Vista Sweetwater, 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/chula-vista-sweetwater/2024/source.