Clovis, CA water hardness
Reported by City of Clovis · January 2025
- CA typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Data
- Utility report
Tap water in Clovis has about 59 mg/L of hardness, which is 3.4 grains per gallon. On the USGS scale that counts as soft. The number comes from City of Clovis, dated January 2025. Reports for this system disagree, with values from 12 to 59 mg/L.
Clovis sits 62 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 202 in Sanger.
What 59 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 59 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 Clovis's water system
No health-based violations since 2016
Serves about 133,118 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- 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 Clovis water hard?
No. It measures about 59 mg/L (3.4 grains per gallon), which the USGS classes as soft.
What is the water hardness in Clovis in grains per gallon?
About 3.4 gpg. One grain per gallon equals 17.1 mg/L, so 59 mg/L divided by 17.1 gives 3.4.
Has the Clovis water system had EPA violations?
EPA records show no health-based violations for City of Clovis since 2016.
Nearby cities
- Mayfair10 mg/LSoft
- Sunnyside167 mg/LHard
- Sanger202 mg/LVery hard
- Selma202 mg/LVery hard
- Reedley202 mg/LVery hard
- Kingsburg91 mg/LModerately hard
- Madera94 mg/LModerately hard
- Dinuba92 mg/LModerately hard
- Madera Acres62 mg/LModerately hard
- Orosi170 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, January 18, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.