Water hardness, mineral, and supply figures on this site are cited from City of Killeen and Harker Heights water quality reports (Bell County WCID No. 1 / Belton Lake supply) and apply to that shared-supply area; hardness at individual addresses varies by supplier and season — Temple, Gatesville, and Salado run separate supplies — which is why every estimate includes an on-site tap test. Cost ranges reflect typical Central Texas installations and are confirmed by written quote. Nothing on this site is engineering or health advice.
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