Water Hardness in Creve Coeur, MO
Missouri · 1 zip codes · 8 matched water systems
City avg (weighted): 121 PPM
Dataset updated March 9, 20268 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
Is Creve Coeur, MO Water Hard or Soft?
The displayed hardness for Creve Coeur, MO is 120 PPM (7 GPG) from Mo American St Louis St Charles Counties, classified as moderately hard. The citywide weighted average is 121 PPM.
Water hardness is not a drinking-water safety score. It measures calcium and magnesium minerals, and address-level results can shift by pressure zone, supply blend, building plumbing, or private well.
How this city reading is built
This city reading is a weighted rollup across 8 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
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 Creve Coeur
These systems are matched to Creve Coeur, MO. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Mo American St Louis St Charles Counties MO6010716 | surface water | 120 PPM Moderately HardUSGS estimate: 273 PPM | |
| Kirkwood Pws MO6010430 | surface water | 120 PPM Moderately HardUSGS estimate: 270 PPM | |
| Mo American Wardsville MO3010831 | groundwater | 394 PPM Very Hard | |
| Mo American Warren County Water & Sewer MO6036149 | groundwater | 394 PPM Very Hard | |
| Mo American Anna Meadows MO6031475 | groundwater | 394 PPM Very Hard |
Zip Codes in Creve Coeur, MO
What This Means For You
Use this city reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
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 Creve Coeur, MO.
Frequently Asked Questions
How hard is the water in Creve Coeur, MO?
The citywide weighted average water hardness in Creve Coeur, MO is 121 PPM (7.1 GPG), classified as moderately hard. This is based on 8 matched water systems. The gauge highlights Mo American St Louis St Charles Counties, a verified treated-water system, because individual systems can differ from the citywide average.
Do I need a water softener in Creve Coeur, MO?
With a citywide average hardness of 121 PPM, a water softener is worth considering for homes in Creve Coeur. Confirm your tap reading before sizing equipment.
Is hard water in Creve Coeur, 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 Creve Coeur, MO?
Creve Coeur, Missouri is served by 8 matched water systems across 1 zip code.
Learn More About Your Water
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