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Water Hardness in Mount Vernon, MO

Missouri · 1 zip codes · 3 matched water systems

200 PPM
11.7 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20263 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 3 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
3 USGS-backed sources
3 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 Mount Vernon

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

3 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.
Mount Vernon Pws
MO5010553
Hard
200 PPMgroundwater4,575 servedHigh Confidence — USGS Monitoring
Park Woods Water Company Inc
MO5031641
Hard
200 PPMgroundwater80 servedHigh Confidence — USGS Monitoring
Jamestowne Mhp
MO5048294
Hard
200 PPMgroundwater46 servedHigh Confidence — USGS Monitoring

Zip Codes in Mount Vernon, 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 Mount Vernon, MO.

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Frequently Asked Questions

How hard is the water in Mount Vernon, MO?

The citywide weighted average water hardness in Mount Vernon, MO is 200 PPM (11.7 GPG), classified as hard. This is based on 3 matched water systems.

Do I need a water softener in Mount Vernon, MO?

With a citywide average hardness of 200 PPM, a water softener is recommended for homes in Mount Vernon. Confirm your tap reading before sizing equipment.

Is hard water in Mount Vernon, 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 Mount Vernon, MO?

Mount Vernon, Missouri is served by 3 matched water systems across 1 zip code.

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