Water Hardness in Little Rock, AR

Q: Do I need a water softener in Little Rock, AR?

At a citywide weighted average of 30 PPM, Little Rock has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Little Rock, AR?

Little Rock, Arkansas has 8 matched water systems across 12 zip codes.

Arkansas · 12 zip codes · 8 matched water systems

30 PPM

1.8 GPG

Soft

0Soft60120180300+

Verified — Annual Water Quality Report

City avg (weighted): 30 PPM

Dataset updated March 9, 20268 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading

Central Arkansas Water

AR0000465

Water source: surface water

Serves: 368,455

USGS environmental estimate: 59 PPM

Source context

How this city reading is built

This city reading is a weighted rollup across 8 matched water systems and 12 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

8 verified treated-water sources

8 matched systems total for this city; treated-water reports are prioritized when available.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Little Rock

These systems are matched to Little Rock, AR. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

8 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Central Arkansas Water AR0000465	surface water	30 PPM Soft USGS estimate: 59 PPM	368,455	Verified — Annual Water Quality Report
Jacksonville Waterworks AR0000466	surface water	30 PPM Soft USGS estimate: 7 PPM	32,875	Verified — Annual Water Quality Report
Cabot Waterworks AR0000338	surface water	30 PPM Soft USGS estimate: 59 PPM	26,770	Verified — Annual Water Quality Report
Mid-Arkansas Utilities P.W.A AR0000725	surface water	30 PPM Soft USGS estimate: 59 PPM	11,148	Verified — Annual Water Quality Report
East End Water AR0000646	groundwater	30 PPM Soft USGS estimate: 102 PPM	5,954	Verified — Annual Water Quality Report

Central Arkansas Water

AR0000465

Soft

30 PPMsurface water368,455 servedVerified — Annual Water Quality Report

Source water: 59 PPM

Jacksonville Waterworks

AR0000466

Soft

30 PPMsurface water32,875 servedVerified — Annual Water Quality Report

Source water: 7 PPM

Cabot Waterworks

AR0000338

Soft

30 PPMsurface water26,770 servedVerified — Annual Water Quality Report

Source water: 59 PPM

Mid-Arkansas Utilities P.W.A

AR0000725

Soft

30 PPMsurface water11,148 servedVerified — Annual Water Quality Report

Source water: 59 PPM

East End Water

AR0000646

Soft

30 PPMgroundwater5,954 servedVerified — Annual Water Quality Report

Source water: 102 PPM

Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Little Rock, AR

7220130 7220230 7220430 7220530 7220630 7220730 7220930 7221030 7221130 7221230 7222330 7222730

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Your Water Is Soft

Your water hardness is in the soft range. You likely don't need a water softener. Enjoy your naturally soft water!

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Little Rock, AR.

Submit Your Data

Frequently Asked Questions

How hard is the water in Little Rock, AR?

The citywide weighted average water hardness in Little Rock, AR is 30 PPM (1.8 GPG), classified as soft. This is based on 8 matched water systems.

Do I need a water softener in Little Rock, AR?

At 30 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Little Rock, AR safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Little Rock, AR?

Little Rock, Arkansas is served by 8 matched water systems across 12 zip codes.

Learn More About Your Water

Water Hardness Scale: PPM and GPG Chart

Use the USGS water hardness scale to compare PPM, GPG, and mg/L levels from soft to very hard water.

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How to Test Water Hardness at Home

Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.

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