Physical & aggregate · 2024
Total Dissolved Solids in Ontario, CA tap water
Ontario, CA's 2024 report shows Total Dissolved Solids detected, but the EPA has not set an enforceable federal limit for it.
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Reported level Purchased Groundwater JCSD (870 Zone) | 372 mg/L | None set |
Reported level Purchased Groundwater CDA 1 (870 Zone) | 308 mg/L | None set |
Reported level Purchased Groundwater CDA 2 (1110 Zone) | 270 mg/L | None set |
Reported level Local Groundwater | 225 mg/L | None set |
Reported level Source water | 228 mg/L | None set |
Verbatim from Ontario, CA's 2024 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 Ontario, CA compares
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People also ask
+Is there Total Dissolved Solids in Ontario, CA tap water?
Yes — Ontario, CA's 2024 Consumer Confidence Report lists Total Dissolved Solids at 372 mg/L. Ontario, CA's 2024 report shows Total Dissolved Solids detected, but the EPA has not set an enforceable federal limit for it.
+What's the federal limit for Total Dissolved Solids in drinking water?
The EPA has not set an enforceable federal limit for Total Dissolved Solids. Utilities still report any measured levels in their annual Consumer Confidence Report.
+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.
+Where does this Total Dissolved Solids measurement come from?
This page reproduces the Total Dissolved Solids entry from the 2024 Consumer Confidence Report published by the Ontario, 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/ontario/2024/source.