How hard is the water in Carencro, LA?

Tap water hardness

99mg/L

5.8gpg

Moderately hard

Reported by Lafayette Utilities Water System · October 2024

LA typical: 102 mg/L
EPA health violations since 2016: 1
Softener for 3 people: 24k grain
Data: Utility report

Carencro water measures 99 mg/L (5.8 gpg) of hardness, moderately hard by USGS standards. The number comes from Lafayette Utilities Water System, dated October 2024.

Carencro on the hardness scale, with nearby cities

Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Carencro sits close to the typical Louisiana figure of 102 mg/L. Of the 10 nearest cities we track, 4 have softer water and 5 have harder. The range nearby runs from 19 mg/L in Port Allen to 159 in Broussard.

What 99 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Carencro

3 people × 75 gallons a day × 5.8 gpg = 1,303 grains a day. A 24,000-grain unit regenerates about every 18 days.

Size it for your household

EPA record for Carencro's water system

City of Carencro Water System · PWSID LA1055005

1 health-based violation since 2016

Serves about 11,301 people from groundwater.

Health-based: 1
Monitoring or reporting: 4
Open now: 2

EPA lists City of Carencro Water System as the system serving Carencro. The hardness figure above comes from a different system's report, which TapWaterData uses for Carencro.

Each dot is one health-based violation, placed at the start of its compliance period.

Contaminant or rule	Violations	Period	Status
Groundwater Ruletreatment of well water	1	2026	1 open

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 Carencro water hard?

Somewhat. It measures about 99 mg/L (5.8 grains per gallon), which the USGS classes as moderately hard.

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

About 5.8 gpg. One grain per gallon equals 17.1 mg/L, so 99 mg/L divided by 17.1 gives 5.8.

What size water softener do I need in Carencro?

For 3 people using 75 gallons each per day, 5.8 gpg works out to about 1,303 grains a day. A 24,000-grain softener covers that with a regeneration about every 18 days.

Has the Carencro water system had EPA violations?

EPA records show 1 health-based violation for City of Carencro Water System since 2016, involving Groundwater Rule. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 32 cities in Louisiana

Hardness data: TapWaterData US Water Hardness (utility report, October 8, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.