Fluoride in Indiana well water
In Indiana, <1% of 3,302 tested private well samples exceeded the EPA limit for fluoride (4 mg/L).
Natural fluoride in bedrock wells can exceed the limit. Above 4 mg/L long-term exposure causes skeletal fluorosis; above 2 mg/L children can develop tooth mottling.
Check your fluoride number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Test your Indiana well for fluoride
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
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Systems that remove fluoride
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Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.
For fluoride
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For fluoride
Aquasana SmartFlow reverse osmosis
under-sink or countertop, about $225
Certified to NSF/ANSI 58 and 53 to reduce arsenic (96%, pentavalent), fluoride (90%), lead (99%), nitrate, nitrite and PFOA/PFOS at the kitchen tap, with a remineralizer.
Rather have it installed and sized for your well? Book a free in-home water test with a licensed local company.
Where to get a well tested for fluoride in Indiana: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit (4 mg/L); counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Vigo | 160 | 91% | 0.3 | 15 mg/L | |
| Greene | 34 | 94% | 0.25 | 4.5 mg/L | |
| Clay | 230 | 100% | 0.275 | 6.6 mg/L | |
| Lake | 186 | 97% | 0.5 | 10 mg/L | |
| Fountain | 71 | 100% | 0.65 | 1.7 mg/L | |
| Posey | 30 | 100% | 0.3 | 2.6 mg/L | |
| Morgan | 60 | 100% | 0.1 | 1.24 mg/L | |
| Hendricks | 40 | 100% | 1.09 | 1.32 mg/L | |
| LaPorte | 77 | 100% | 0.2 | 1.1 mg/L | |
| Bartholomew | 36 | 97% | 0.1 | 0.5 mg/L | |
| Wayne | 30 | 97% | 0.2 | 2.51 mg/L | |
| Tippecanoe | 98 | 96% | 0.1 | 1.1 mg/L | |
| Shelby | 33 | 94% | 0.6 | 2.1 mg/L | |
| Hamilton | 31 | 94% | 0.22 | 1.1 mg/L | |
| Hancock | 67 | 93% | 0.4 | 1.1 mg/L |
- Riley township, Vigo County18% of 51
- Posey township, Clay County7% of 56
- North township, Lake County5% of 63
- Calumet township, Lake County1% of 76
- Sugar Creek township, Hancock County0% of 32
- Pike township, Marion County0% of 31
- Brown township, Hendricks County0% of 30
- Hanna township, LaPorte County0% of 54
- Warren township, Marion County0% of 45
- Perry township, Clay County0% of 93
- Columbus township, Bartholomew County0% of 30
- Wayne township, Tippecanoe County0% of 68
- Center township, Marion County0% of 47
- Perry township, Marion County0% of 32
- Concord township, Elkhart County0% of 34
- Westchester township, Porter County0% of 289
- McClellan township, Newton County0% of 42
- Harrison township, Kosciusko County0% of 68
- Cleveland township, Elkhart County0% of 64
- Osolo township, Elkhart County0% of 34
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. fluoride counts and shares are listed on each county and town page with their sources.