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Water Hardness in Shell Knob, MO

Missouri · 1 zip codes · 12 matched water systems

161 PPM
9.4 GPG
Moderately Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 202612 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 12 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
1 USGS-backed source
12 matched systems total for this city; 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 in Shell Knob

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

12 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.
Mo American Ozark Mtn Water Company 2
MO5036163
Moderately Hard
143 PPMgroundwater583 servedHigh Confidence — USGS Monitoring
Fox Woods Subdivision
MO5036197
Moderately Hard
174 PPMgroundwater125 servedEstimated — Nearby Data
Green Shores Subd
MO5036102
Moderately Hard
174 PPMgroundwater120 servedEstimated — Nearby Data
Ozark Villa At Shell Knob
MO5071342
Moderately Hard
174 PPMgroundwater110 servedEstimated — Nearby Data
Crystal Beach Subd
MO5031192
Moderately Hard
174 PPMgroundwater91 servedEstimated — Nearby Data
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Shell Knob, MO

What This Means For You

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

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If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Shell Knob, MO.

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Frequently Asked Questions

How hard is the water in Shell Knob, MO?

The citywide weighted average water hardness in Shell Knob, MO is 161 PPM (9.4 GPG), classified as moderately hard. This is based on 12 matched water systems.

Do I need a water softener in Shell Knob, MO?

With a citywide average hardness of 161 PPM, a water softener is worth considering for homes in Shell Knob. Confirm your tap reading before sizing equipment.

Is hard water in Shell Knob, MO 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 Shell Knob, MO?

Shell Knob, Missouri is served by 12 matched water systems across 1 zip code.

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