Disinfection byproducts · 2023
TTHM in Hawthorne-city Water Dept. — San Jose, Ca, CA tap water
Hawthorne-city Water Dept. — San Jose, Ca, CA's 2023 TTHM measurement is below the federal limit of 80 ug/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Range System-wide | 20–60 ug/L | 80 ug/L MCL |
Average Annual Average | 45 ug/L | 80 ug/L MCL |
Range Diemer Plant | 24–30 ug/L | 80 ug/L MCL |
Running annual avg Diemer Plant | 44 ug/L | 80 ug/L MCL |
Range Jensen Plant | 13–27 ug/L | 80 ug/L MCL |
Running annual avg Jensen Plant | 21 ug/L | 80 ug/L MCL |
Range Mills Plant | 14–29 ug/L | 80 ug/L MCL |
Running annual avg Mills Plant | 44 ug/L | 80 ug/L MCL |
Range Skinner Plant | 15–48 ug/L | 80 ug/L MCL |
Running annual avg Skinner Plant | 34 ug/L | 80 ug/L MCL |
Range Weymouth Plant | 28–37 ug/L | 80 ug/L MCL |
Running annual avg Weymouth Plant | 32 ug/L | 80 ug/L MCL |
Range Distribution System | 12–48 ug/L | 80 ug/L MCL |
Running annual avg Distribution System Highest LRAA | 45 ug/L | 80 ug/L MCL |
Verbatim from Hawthorne-city Water Dept. — San Jose, Ca, CA'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.
How Hawthorne-city Water Dept. — San Jose, Ca, CA compares
4 of the 250 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 Hawthorne-city Water Dept. — San Jose, Ca, CA tap water?
Yes — Hawthorne-city Water Dept. — San Jose, Ca, CA's 2023 Consumer Confidence Report lists TTHM at 45 ug/L. Hawthorne-city Water Dept. — San Jose, Ca, CA's 2023 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 250 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 2023 Consumer Confidence Report published by the Hawthorne-city Water Dept. — San Jose, 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/hawthorne-city-water-dept-san-jose-ca/2023/source.