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Water Hardness in 71730

El Dorado, Arkansas · Union County

24 PPM
1.4 GPG
Soft
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 14 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 14 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.

Source basis
14 USGS-backed sources
14 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily groundwater
Groundwater commonly picks up calcium and magnesium after contact with rock and soil. 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 Serving 71730

These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.

14 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.
El Dorado Waterworks
AR0000550
Soft
24 PPMgroundwater17,932 servedHigh Confidence — USGS Monitoring
Parkers Chapel Public Water
AR0000560
Soft
24 PPMgroundwater2,391 servedHigh Confidence — USGS Monitoring
Wildwood Water Association
AR0000562
Soft
24 PPMgroundwater1,350 servedHigh Confidence — USGS Monitoring
Faircrest Water Association
AR0000544
Soft
24 PPMgroundwater1,329 servedHigh Confidence — USGS Monitoring
Old Union Public Water Authority
AR0000559
Soft
24 PPMgroundwater1,200 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

717592471724237176224717492271751247176522717582571256271277407107927165168717442

What This Means For You

Recommendations are based on the displayed ZIP 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 El Dorado, AR (71730).

Submit Your Data

Frequently Asked Questions

Is the water hard in El Dorado, AR (71730)?

The average water hardness in 71730 is 24 PPM (1.4 GPG), which is classified as soft.

Do I need a water softener in 71730?

At 24 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 71730 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 71730?

Zip code 71730 in El Dorado, Arkansas is served by 14 water systems.

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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