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Water Hardness in 39531

Biloxi, Mississippi · Harrison County

30 PPM
1.8 GPG
Soft
0Soft60120180300+
Verified — Annual Water Quality Report

Dataset updated March 9, 2026Matched to 8 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 8 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
8 verified treated-water sources
8 matched systems total for this ZIP; treated-water reports are prioritized when available.
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 39531

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.

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.
City Of Gulfport
MS0240003
Soft
30 PPMgroundwater75,056 servedVerified — Annual Water Quality Report
Source water: 3 PPM
City Of Biloxi
MS0240001
Soft
30 PPMgroundwater23,310 servedVerified — Annual Water Quality Report
Source water: 3 PPM
City Of Long Beach
MS0240005
Soft
30 PPMgroundwater18,514 servedVerified — Annual Water Quality Report
Source water: 3 PPM
Diberville W/S
MS0240002
Soft
30 PPMgroundwater12,721 servedVerified — Annual Water Quality Report
Source water: 3 PPM
City Of Pass Christian
MS0240009
Soft
30 PPMgroundwater10,436 servedVerified — Annual Water Quality Report
Source water: 8 PPM
Showing the first 5 systems. Expand to review all matched systems.

Nearby Zip Codes

39507303953030395322939501303956416539503303956030395743039571303955316539565165395257

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 Biloxi, MS (39531).

Submit Your Data

Frequently Asked Questions

Is the water hard in Biloxi, MS (39531)?

The average water hardness in 39531 is 30 PPM (1.8 GPG), which is classified as soft.

Do I need a water softener in 39531?

At 30 PPM, your water is relatively soft. A water softener is generally not necessary.

Is hard water in 39531 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 39531?

Zip code 39531 in Biloxi, Mississippi is served by 8 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.

10 min read

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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