Drinking Water Fluoride Dose Calculator
Drinking Water Fluoride Dose Calculator
What Is a Drinking Water Fluoride Dose Calculator?
This calculator determines how much fluoride chemical product must be dosed into a water treatment plant to raise the fluoride concentration from its natural level to a target level. It supports the three most common fluoridation chemicals — fluorosilicic acid (H₂SiF₆, used in ~90% of US fluoridation systems), sodium fluoride (NaF), and sodium fluorosilicate (Na₂SiF₆). Defaults show a 10 ML/day plant with 0.3 mg/L natural fluoride targeting the US optimal of 0.7 mg/L, requiring fluorosilicic acid at the calculated dose.
How the Dose Is Calculated
Fluoride Demand (mg/L) = Target Fluoride − Natural Fluoride. Fluoride Needed (g/day) = Demand × Flow Rate (m³/day). Product Dose (kg/day) = Fluoride Needed ÷ (Product Purity% ÷ 100 × 1000). For liquid fluorosilicic acid, kg/day is further divided by the product density (1.22 kg/L) to get litres/day. The WHO maximum fluoride guideline is 1.0 mg/L; the US optimal is 0.7 mg/L (CDC, 2015 update). The bar chart shows natural fluoride, the dose increment, and the target level against WHO and US reference lines.
Understanding Your Results
The primary result gives the daily product dose in litres (for liquid) or kilograms (for solid chemicals), plus the annual consumption for procurement planning. The 3-stat bar shows demand, daily fluoride mass needed, and WHO compliance status. The breakdown table shows every conversion step from flow and concentration to final product mass. Always verify calculated doses against laboratory jar testing and online dosing pump calibration data — this calculator provides the theoretical dose based on product purity, which may vary between manufacturer batches.
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