Wentzville, MO Water Report

Wentzville water is genuinely hard - 11 to 17 grains a gallon, deep in the "very hard" zone. That's the chalky white crust locking up your faucets and showerheads, the soap that won't rinse off, the filmy skin and dry, brittle hair after every shower, and scale quietly coating the inside of your water heater until it dies years early. On top of the hardness, your tap carries 34-40 ppb of chlorination byproducts (trihalomethanes), radium sitting at 80% of the federal limit, and detectable "forever chemicals" (PFAS) - all technically legal, but not what you want your family drinking.

On a private well in Wentzville: Two private-well profiles ring Wentzville. River-bottom alluvial wells (shallow, near the Missouri): high iron, manganese, hardness, rotten-egg sulfur (H2S) smell, plus bacterial/coliform and nitrate risk from ag runoff and septic. Deep bedrock wells (limestone/dolomite uplands): very high hardness plus naturally occurring radium (~4 pCi/L, same signature as the city's deep wells). Nitrate from fertilizer and septic is the documented #1 health concern for rural St. Charles wells. Private wells are unregulated with no CCR oversight - the natural wedge for Jones's free test plus a softener / iron-sulfur filter / UV stack.