Fluoride Addition Calculator
Calculate chemical feed rate for water fluoridation to achieve target concentration using NaF, fluorosilicic acid, or sodium fluorosilicate.
Inputs
MGD
mg/L
mg/L
Results
Fluoride to Add
0.6 mg/L
Chemical Feed Rate
19.34 lbs/day
Chemical UsedFluorosilicic Acid (H₂SiF₆)
Solution Feed Rate8.2 gpd
Target ComplianceWithin recommended range (0.6-1.0 mg/L)
Annual Chemical Usage7,060 lbs
Annual Chemical Cost$1,059
30-Day Storage Needed246
Annual Gallons2,992.13
How to Use This Calculator
- Enter Plant Flow Rate (MGD) — the total flow that will receive fluoride treatment.
- Set Target Fluoride Level (mg/L) to the CDC-recommended optimal level of 0.7 mg/L.
- Enter Natural Fluoride Level (mg/L) from your source water monitoring data.
- Select Fluoride Chemical (sodium fluoride, fluorosilicic acid, or sodium fluorosilicate) and enter Chemical Purity (%).
- Review Fluoride to Add (mg/L) and Chemical Feed Rate (lbs/day) to configure your chemical feed system.
- Check Compliance Status to confirm the target level is within the EPA maximum contaminant level of 4.0 mg/L.
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