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Water Hardness in Princeton, MO

Missouri · 1 zip codes · 1 matched water system

211 PPM
12.3 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20261 matched water system 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 1 matched water system and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
1 USGS-backed source
1 matched system 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 Princeton

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

1 water system
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.
Princeton Pws
MO2010664
Hard
211 PPMgroundwater1,283 servedHigh Confidence — USGS Monitoring

Zip Codes in Princeton, 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 Princeton, MO.

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Frequently Asked Questions

How hard is the water in Princeton, MO?

The citywide weighted average water hardness in Princeton, MO is 211 PPM (12.3 GPG), classified as hard. This is based on 1 matched water system.

Do I need a water softener in Princeton, MO?

With a citywide average hardness of 211 PPM, a water softener is recommended for homes in Princeton. Confirm your tap reading before sizing equipment.

Is hard water in Princeton, 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 Princeton, MO?

Princeton, Missouri is served by 1 matched water system across 1 zip code.

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