Where does the water in 65330 come from?

Water for zip code 65330 in Gilliam, Missouri is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 65330

Gilliam, Missouri · Saline County

139 PPM

8.2 GPG

Moderately Hard

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 2026Matched to 2 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 2 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

1 USGS-backed source

2 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 65330

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.

2 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
Marshall Pws MO2010502	groundwater	139 PPM Moderately Hard	12,934	High Confidence — USGS Monitoring
Gilliam Pws MO2010305	groundwater	182 PPM Hard	125	Estimated — Nearby Data

Marshall Pws

MO2010502

Moderately Hard

139 PPMgroundwater12,934 servedHigh Confidence — USGS Monitoring

Gilliam Pws

MO2010305

Hard

182 PPMgroundwater125 servedEstimated — Nearby Data

Nearby Zip Codes

65349147 65254532 65246120 65320139 65250287 65344140 65230120 65340139 65248532 65261170 65236170 65347139

What This Means For You

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

Moderately Hard Water

Your water is moderately hard. You're likely seeing scale buildup on fixtures, spotty dishes, and may notice dry skin or hair. A water softener or conditioner can help.

Recommended Products

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

Salt-Based Water Softener

Our PickAFWFilters Fleck 5600SXT 48K Also GreatWhirlpool WHES40E 40K Also GreatAFWFilters 64K Grain Also GreatAFWFilters Iron Pro 2 64K Also GreatSpringWell Filter + Softener Combo

Shower Head Filter

Our PickWeddell Duo Also GreatAquaBliss SF100 Also GreatSprite Pure 7-Setting Also GreatAqua Earth 20-Stage

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How to Test Your 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 Gilliam, MO (65330).

Submit Your Data

Frequently Asked Questions

Is the water hard in Gilliam, MO (65330)?

The average water hardness in 65330 is 139 PPM (8.2 GPG), which is classified as moderately hard.

Do I need a water softener in 65330?

With hardness of 139 PPM, a water softener is worth considering for homes in 65330.

Is hard water in 65330 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 65330?

Zip code 65330 in Gilliam, Missouri is served by 2 water systems.