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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Analysis of fluoride contamination levels across Indiana cities
Complete list of cities where fluoride has been detected, sorted by level
| City | Level | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
| Michigan CityGrade C+ | 1.37 mg/L | 4.00 mg/L | 34.3% | Safe |
| EvansvilleGrade C | 1.29 mg/L | 4.00 mg/L | 32.2% | Safe |
| HobartGrade B- | 1.09 mg/L | 4.00 mg/L | 27.3% | Safe |
| LawrenceGrade B+ | 1.07 mg/L | 4.00 mg/L | 26.7% | Safe |
| HammondGrade C- | 1.01 mg/L | 4.00 mg/L | 25.4% | Safe |
| MishawakaGrade F | 0.984 mg/L | 4.00 mg/L | 24.6% | Safe |
| ValparaisoGrade B | 0.967 mg/L | 4.00 mg/L | 24.2% | Safe |
| NoblesvilleGrade A- | 0.917 mg/L | 4.00 mg/L | 22.9% | Safe |
| ClarksvilleGrade B- | 0.906 mg/L | 4.00 mg/L | 22.6% | Safe |
| BloomingtonGrade B+ | 0.854 mg/L | 4.00 mg/L | 21.3% | Safe |
| JeffersonvilleGrade B+ | 0.821 mg/L | 4.00 mg/L | 20.5% | Safe |
| KokomoGrade B+ | 0.806 mg/L | 4.00 mg/L | 20.1% | Safe |
| GrangerGrade B- | 0.792 mg/L | 4.00 mg/L | 19.8% | Safe |
| WestfieldGrade A | 0.764 mg/L | 4.00 mg/L | 19.1% | Safe |
| CarmelGrade A- | 0.744 mg/L | 4.00 mg/L | 18.6% | Safe |
| ColumbusGrade B- | 0.724 mg/L | 4.00 mg/L | 18.1% | Safe |
| Crown PointGrade A | 0.713 mg/L | 4.00 mg/L | 17.8% | Safe |
| MerrillvilleGrade A | 0.708 mg/L | 4.00 mg/L | 17.7% | Safe |
| ElkhartGrade A- | 0.701 mg/L | 4.00 mg/L | 17.5% | Safe |
| FranklinGrade A+ | 0.685 mg/L | 4.00 mg/L | 17.1% | Safe |
| GoshenGrade B+ | 0.665 mg/L | 4.00 mg/L | 16.6% | Safe |
| MarionGrade B- | 0.662 mg/L | 4.00 mg/L | 16.6% | Safe |
| MuncieGrade A | 0.661 mg/L | 4.00 mg/L | 16.5% | Safe |
| LafayetteGrade A- | 0.638 mg/L | 4.00 mg/L | 15.9% | Safe |
| South BendGrade A- | 0.632 mg/L | 4.00 mg/L | 15.8% | Safe |
Showing 25 of 38 cities. View individual city pages for detailed reports.
While fluoride at low levels is added to prevent tooth decay, excessive exposure can cause problems. Dental fluorosis causes white spots on teeth in children. Skeletal fluorosis from long-term exposure to very high levels can cause joint stiffness and bone damage. Studies have suggested potential links between high fluoride levels and thyroid function issues.
Water additive for dental health; erosion of natural deposits; discharge from fertilizer factories
Based on our analysis of EPA Safe Drinking Water Information System (SDWIS) data and local water utility reports,fluoride has been detected in 38 Indiana water systems. The average level across all tested cities is 19% of the EPA Maximum Contaminant Level (MCL), with the highest detection at 34.3% of the limit.
The EPA MCL for fluoride is 4.0 mg/L, with a secondary standard of 2.0 mg/L. The EPA MCL for fluoride is 4 mg/L. This limit is set to protect public health based on available scientific evidence about the contaminant's health effects.
38 Indiana cities have fluoride detected in their water supply. All tested cities are within EPA safety limits.
Dental fluorosis (tooth discoloration), skeletal problems at high levels, potential thyroid effects. The most vulnerable groups include children during tooth development and people with kidney disease.
The most effective methods for removing fluoride include Reverse Osmosis, Distillation, Activated Alumina. Look for filters certified by NSF/ANSI for fluoride reduction.
The EPA Maximum Contaminant Level (MCL) for fluoride is 4 mg/L.The EPA MCL for fluoride is 4.0 mg/L, with a secondary standard of 2.0 mg/L.
Recommended filtration methods for fluoride removal:
Removes 90-95% of fluoride
Very effective
Specifically designed for fluoride