Lodi, CA water hardness
Calculated from the utility's calcium and magnesium results · September 2023
- CA typical
- 121 mg/L
- EPA health violations since 2016
- 0
- Data
- Calculated from utility data
Lodi water measures 4 mg/L (0.2 gpg) of hardness, soft by USGS standards. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (September 2023).
At 4 mg/L, Lodi is 117 mg/L below the typical California figure of 121. None of the 10 nearest cities we track has softer water. The range nearby runs from 10 mg/L in Country Club to 137 in Discovery Bay.
What 4 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 4 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 Lodi's water system
No health-based violations since 2016
Serves about 67,093 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
EPA lists this system as serving Lodi.
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 Lodi water hard?
No. It measures about 4 mg/L (0.2 grains per gallon), which the USGS classes as soft.
What is the water hardness in Lodi in grains per gallon?
About 0.2 gpg. One grain per gallon equals 17.1 mg/L, so 4 mg/L divided by 17.1 gives 0.2.
Has the Lodi water system had EPA violations?
EPA records show no health-based violations for Lodi, City of since 2016.
Nearby cities
- Galt67 mg/LModerately hard
- Country Club10 mg/LSoft
- Elk Grove50 mg/LSoft
- Discovery Bay137 mg/LHard
- Rio Vista49 mg/LSoft
- Manteca75 mg/LModerately hard
- Rancho Calaveras54 mg/LSoft
- Oakley89 mg/LModerately hard
- Vineyard53 mg/LSoft
- Florin66 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (calculated from utility data, September 13, 2023), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.