Physical & aggregate · 2026
Total Dissolved Solids in Pomona - City, Water Dept., CA tap water
Pomona - City, Water Dept., CA's 2026 Total Dissolved Solids measurement is below the federal limit of 1000 MG/L (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Highest single sample Entry point | 430 MG/L | 1000 MG/L MCL |
Average Source water | 250 MG/L | 1000 MG/L MCL |
Average Entry point | 304 MG/L | 1000 MG/L MCL |
Highest single sample Source water | 270 MG/L | 1000 MG/L MCL |
Verbatim from Pomona - City, Water Dept., CA's 2026 Consumer Confidence Report — source document ↗
About Total Dissolved Solids
Total dissolved solids — the combined content of all dissolved minerals and salts.
Regulated only as a secondary (cosmetic) standard; high levels affect taste and hardness.
How Pomona - City, Water Dept., CA compares
5 of the 237 systems measuring Total Dissolved Solids on The Water Map have it at or above the federal limit:
Nearby systems also reporting Total Dissolved Solids:
People also ask
+Is there Total Dissolved Solids in Pomona - City, Water Dept., CA tap water?
Yes — Pomona - City, Water Dept., CA's 2026 Consumer Confidence Report lists Total Dissolved Solids at 304 MG/L. Pomona - City, Water Dept., CA's 2026 Total Dissolved Solids measurement is below the federal limit of 1000 MG/L (MCL).
+What's the federal limit for Total Dissolved Solids in drinking water?
The federal MCL for Total Dissolved Solids is 1000 MG/L. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Total Dissolved Solids?
Total dissolved solids — the combined content of all dissolved minerals and salts. Regulated only as a secondary (cosmetic) standard; high levels affect taste and hardness.
+Which other U.S. cities have Total Dissolved Solids over the federal limit?
5 of the 237 systems on The Water Map measuring Total Dissolved Solids report it at or above the federal limit. Examples include St George, UT, College Station, TX, Inglewood, CA.
+Where does this Total Dissolved Solids measurement come from?
This page reproduces the Total Dissolved Solids entry from the 2026 Consumer Confidence Report published by the Pomona - City, Water Dept., 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/pomona-city-water-dept/2026/source.