Monroe, LA water hardness

Tap water hardness
54mg/L
3.2gpg
Soft

Reported by Monroe Water System · May 2024

LA typical
102 mg/L
EPA health violations since 2016
6
Data
Utility report

Tap water in Monroe has about 54 mg/L of hardness, which is 3.2 grains per gallon. On the USGS scale that counts as soft. The number comes from Monroe Water System, dated May 2024.

Monroe on the hardness scale, with nearby cities
060120180240300360+LA typical 102Port Allen: 19 mg/LPort Allen 19Ruston: 20 mg/LRuston 20Baton Rouge: 23 mg/LBaton Rouge 23Alexandria: 26 mg/LAlexandria 26Shreveport: 47 mg/LShreveport 47Bossier City: 48 mg/LBossier City 48Zachary: 55 mg/LZachary 55Carencro: 99 mg/LCarencro 99Scott: 99 mg/LScott 99Lafayette: 102 mg/LLafayette 102Monroe 54mg/L as calcium carbonate060120180240300360+LA 102Port Allen: 19 mg/LPort Allen 19Ruston: 20 mg/LRuston 20Alexandria: 26 mg/LAlexandria 26Shreveport: 47 mg/LShreveport 47Bossier City: 48 mg/LBossier Ci. 48Zachary: 55 mg/LZachary 5554 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Monroe sits 48 mg/L below the typical Louisiana figure of 102. Of the 10 nearest cities we track, 6 have softer water and 4 have harder. The range nearby runs from 19 mg/L in Port Allen to 102 in Lafayette.

What 54 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 54 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 Monroe's water system

City of Monroe Water System · PWSID LA1073031

6 health-based violations since 2016

Serves about 57,000 people from surface water.

Health-based
6
Monitoring or reporting
0
Open now
0
20162017201820192020202120222023202420252026Surface Water Treatment Rule (LT2)Surface Water Treatment RuleLead and Copper RuleHaloacetic acids (HAA5)'16'18'20'22'24'26Surface Water Treatment Rule (LT2)Surface Water Treatment RuleLead and Copper RuleHaloacetic acids (HAA5)
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Surface Water Treatment Rule (LT2)filtration and disinfection12026Resolved
Surface Water Treatment Rulefiltration and disinfection22026Resolved
Lead and Copper Rulecorrosion control and lead sampling12024Resolved
Haloacetic acids (HAA5)a disinfection byproduct22019Resolved

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 Monroe water hard?

No. It measures about 54 mg/L (3.2 grains per gallon), which the USGS classes as soft.

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

About 3.2 gpg. One grain per gallon equals 17.1 mg/L, so 54 mg/L divided by 17.1 gives 3.2.

Has the Monroe water system had EPA violations?

EPA records show 6 health-based violations for City of Monroe Water System since 2016, involving Surface Water Treatment Rule (LT2), Surface Water Treatment Rule, Lead and Copper Rule.

Nearby cities

All 32 cities in Louisiana

Hardness data: TapWaterData US Water Hardness (utility report, May 10, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.