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Water Hardness in De Soto, MO

Missouri · 1 zip codes · 15 matched water systems

281 PPM
16.4 GPG
Very Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 202615 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 15 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
14 USGS-backed sources
15 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily surface water
Surface-water hardness can shift with reservoirs, runoff, season, and treatment. 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 De Soto

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

15 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.
Jefferson Co Cons Pwsd C 1
MO6024295
Very Hard
287 PPMsurface water37,000 servedHigh Confidence — USGS Monitoring
Jefferson County Pwsd 1
MO6024292
Very Hard
270 PPMsurface water21,113 servedHigh Confidence — USGS Monitoring
Jefferson County Pwsd 3
MO6024294
Very Hard
270 PPMsurface water17,000 servedHigh Confidence — USGS Monitoring
Jefferson County Pwsd 2
MO6024293
Very Hard
270 PPMsurface water16,548 servedHigh Confidence — USGS Monitoring
Festus Pws
MO6010276
Very Hard
287 PPMsurface water12,054 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in De Soto, MO

What This Means For You

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

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

Recommended Products

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 De Soto, MO.

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Frequently Asked Questions

How hard is the water in De Soto, MO?

The citywide weighted average water hardness in De Soto, MO is 281 PPM (16.4 GPG), classified as very hard. This is based on 15 matched water systems.

Do I need a water softener in De Soto, MO?

With a citywide average hardness of 281 PPM, a water softener is recommended for homes in De Soto. Confirm your tap reading before sizing equipment.

Is hard water in De Soto, 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 De Soto, MO?

De Soto, Missouri is served by 15 matched water systems across 1 zip code.

Learn More About Your Water