Water hardness in Louisiana

Typical Louisiana tap water
102mg/L
6.0gpg
Moderately hard

Population-weighted middle value across 61 Louisiana cities in the dataset

People with hard or very hard water
45%
Hardest
Houma 360
Softest
Covington 4

We have hardness numbers for 32 Louisiana cities; 10 of them are county estimates rather than utility figures. Each city page adds the water system's EPA violation record and a softener size for a typical household.

Every Louisiana city on the hardness scale
SoftModerately hardHardVery hard060120180240300360+New Orleans: 153 mg/LBaton Rouge: 23 mg/LShreveport: 47 mg/LMetairie: 135 mg/LLafayette: 102 mg/LLake Charles: 120 mg/LBossier City: 48 mg/LMonroe: 54 mg/LAlexandria: 26 mg/LPrairieville: 66 mg/LMarrero: 154 mg/LHouma: 360 mg/LSlidell: 42 mg/LNew Iberia: 136 mg/LHammond: 27 mg/LRuston: 20 mg/LZachary: 55 mg/LSulphur: 211 mg/LYoungsville: 147 mg/LGretna: 153 mg/LBroussard: 159 mg/LCarencro: 99 mg/LMandeville: 48 mg/LCovington: 4 mg/LBelle Chasse: 153 mg/LJefferson: 154 mg/LScott: 99 mg/LWestwego: 154 mg/LBridge City: 154 mg/LElmwood: 154 mg/LCarlyss: 211 mg/LPort Allen: 19 mg/LNew OrleansBaton RougeLafayetteBossier CitySoftMod.HardVery hard060120180240300360+New Orleans: 153 mg/LBaton Rouge: 23 mg/LShreveport: 47 mg/LMetairie: 135 mg/LLafayette: 102 mg/LLake Charles: 120 mg/LBossier City: 48 mg/LMonroe: 54 mg/LAlexandria: 26 mg/LPrairieville: 66 mg/LMarrero: 154 mg/LHouma: 360 mg/LSlidell: 42 mg/LNew Iberia: 136 mg/LHammond: 27 mg/LRuston: 20 mg/LZachary: 55 mg/LSulphur: 211 mg/LYoungsville: 147 mg/LGretna: 153 mg/LBroussard: 159 mg/LCarencro: 99 mg/LMandeville: 48 mg/LCovington: 4 mg/LBelle Chasse: 153 mg/LJefferson: 154 mg/LScott: 99 mg/LWestwego: 154 mg/LBridge City: 154 mg/LElmwood: 154 mg/LCarlyss: 211 mg/LPort Allen: 19 mg/LNew OrleansBaton Rouge

Dot size follows population. Tap a dot for the city page.

12Soft
4Moderately hard
13Hard
3Very hard

Hardest water in Louisiana

  1. Houma360
  2. Sulphur211
  3. Carlyss211
  4. Broussard159
  5. Marrero154
  6. Jefferson154
  7. Westwego154
  8. Bridge City154

Softest water in Louisiana

  1. Covington4
  2. Port Allen19
  3. Ruston20
  4. Baton Rouge23
  5. Alexandria26
  6. Hammond27
  7. Slidell42
  8. Shreveport47

All cities in Louisiana

Citymg/LgpgClassDataEPA health violations
New Orleans1539.0HardUtility report1
Baton Rouge231.4SoftUtility report0
Shreveport472.7SoftUtility report23
Metairie1357.9HardUtility report0
Lafayette1026.0Moderately hardUtility report0
Lake Charles1207.0HardCounty estimate0
Bossier City482.8SoftCounty estimate0
Monroe543.2SoftUtility report6
Alexandria261.5SoftCounty estimate1
Prairieville663.9Moderately hardCounty estimate–
Marrero1549.0HardUtility report7
Houma36021.1Very hardCounty estimate–
Slidell422.5SoftCounty estimate1
New Iberia1368.0HardCounty estimate–
Hammond271.6SoftCounty estimate2
Ruston201.2SoftCounty estimate0
Zachary553.2SoftCounty estimate0
Sulphur21112.3Very hardUtility report1
Youngsville1478.6HardUtility report4
Gretna1538.9HardUtility report1
Broussard1599.3HardUtility report2
Carencro995.8Moderately hardUtility report1
Mandeville482.8SoftUtility report0
Covington40.2SoftUtility report0
Belle Chasse1538.9HardUtility report0
Jefferson1549.0HardUtility report7
Scott995.8Moderately hardUtility report1
Westwego1549.0HardUtility report7
Bridge City1549.0HardUtility report7
Elmwood1549.0HardUtility report7
Carlyss21112.3Very hardUtility report1
Port Allen191.1SoftUtility report1

Questions

Is Louisiana water hard?

The typical Louisiana resident gets about 102 mg/L (6.0 gpg), which is moderately hard. About 45% of people in the cities we track have hard or very hard water.

Which city in Louisiana has the hardest water?

Among 32 cities with pages here, Houma is highest at 360 mg/L.

Which city in Louisiana has the softest water?

Covington, at 4 mg/L.

Other states

Hardness data: TapWaterData US Water Hardness, CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.