Mendota, CA water hardness

Tap water hardness
17mg/L
1.0gpg
Soft

Reported by Mendota, City of · April 2023

CA typical
121 mg/L
EPA health violations since 2016
0
Data
Utility report

Mendota water measures 17 mg/L (1.0 gpg) of hardness, soft by USGS standards. The number comes from Mendota, City of, dated April 2023.

Mendota on the hardness scale, with nearby cities
060120180240300360+CA typical 121Mayfair: 10 mg/LMayfair 10Clovis: 59 mg/LClovis 59Madera Acres: 62 mg/LMadera Acres 62Madera: 94 mg/LMadera 94Lemoore Station: 100 mg/LLemoore Station 100Firebaugh: 121 mg/LFirebaugh 121Los Banos: 138 mg/LLos Banos 138Merced: 138 mg/LMerced 138Atwater: 138 mg/LAtwater 138Sunnyside: 167 mg/LSunnyside 167Mendota 17mg/L as calcium carbonate060120180240300360+CA 121Mayfair: 10 mg/LMayfair 10Madera Acres: 62 mg/LMadera Acr. 62Madera: 94 mg/LMadera 94Firebaugh: 121 mg/LFirebaugh 121Los Banos: 138 mg/LLos Banos 138Sunnyside: 167 mg/LSunnyside 16717 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 17 mg/L, Mendota is 104 mg/L below the typical California figure of 121. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 10 mg/L in Mayfair to 167 in Sunnyside.

What 17 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Nothing, as far as hardness goes. At 17 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Mendota's water system

Mendota, City of · PWSID CA1010021

No health-based violations since 2016

Serves about 12,595 people from groundwater.

Health-based
0
Monitoring or reporting
1
Open now
0

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Mendota water hard?

No. It measures about 17 mg/L (1.0 grains per gallon), which the USGS classes as soft.

What is the water hardness in Mendota in grains per gallon?

About 1.0 gpg. One grain per gallon equals 17.1 mg/L, so 17 mg/L divided by 17.1 gives 1.0.

Has the Mendota water system had EPA violations?

EPA records show no health-based violations for Mendota, City of since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 515 cities in California

Hardness data: TapWaterData US Water Hardness (utility report, April 4, 2023), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.