Physical & aggregate · 2023

Hardness in Los Angeles LADWP, CA tap water

Detected — no federal limit

Los Angeles LADWP, CA's 2023 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.

The measurement

StatisticValue
Average
Southern Combined Wells
142 mg/L
Average
MWD Jensen Plant
148 mg/L
Range
MWD Weymouth Plant
241–303 mg/L
Range
MWD Diemer Plant
235–305 mg/L
Range
Los Angeles Aqueduct Filtration Plant
109–113 mg/L
Range
MWD Jensen Plant
143–153 mg/L
Average
Los Angeles Aqueduct Filtration Plant
112 mg/L
Average
MWD Diemer Plant
270 mg/L
Range
Northern Combined Wells
106–174 mg/L
Average
MWD Weymouth Plant
272 mg/L
Average
Northern Combined Wells
122 mg/L
Range
Southern Combined Wells
112–195 mg/L

Verbatim from Los Angeles LADWP, CA's 2023 Consumer Confidence Report — source document ↗

About Hardness

A measure of dissolved calcium and magnesium minerals.

Not federally regulated for health; affects scaling, soap use, and taste.

How Los Angeles LADWP, CA compares

4 of the 124 systems measuring Hardness on The Water Map have it at or above the federal limit:

Nearby systems also reporting Hardness:

People also ask

+Is there Hardness in Los Angeles LADWP, CA tap water?

Yes — Los Angeles LADWP, CA's 2023 Consumer Confidence Report lists Hardness at 272 mg/L. Los Angeles LADWP, CA's 2023 report shows Hardness detected, but the EPA has not set an enforceable federal limit for it.

+What's the federal limit for Hardness in drinking water?

The EPA has not set an enforceable federal limit for Hardness. Utilities still report any measured levels in their annual Consumer Confidence Report.

+What is Hardness?

A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.

+Which other U.S. cities have Hardness over the federal limit?

4 of the 124 systems on The Water Map measuring Hardness report it at or above the federal limit. Examples include Pomona, CA, Burbank, CA, San Diego, CA.

+Where does this Hardness measurement come from?

This page reproduces the Hardness entry from the 2023 Consumer Confidence Report published by the Los Angeles LADWP, 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/los-angeles-ladwp/2023/source.

Full report
All Los Angeles LADWP, CA water-quality data →
Every contaminant measured in the 2023 report.
Contaminant pillar
Hardness across the U.S. →
Every public water system measuring Hardness, ranked.