Fluoride in Iowa well water
In Iowa, <1% of 14,311 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 Iowa 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 Iowa: 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 |
|---|---|---|---|---|---|
| Polk | 176 | 100% | 0.385 | 9 mg/L | |
| Calhoun | 105 | 100% | 1.1 | 5.2 mg/L | |
| Lee | 125 | 94% | 0.4 | 150 mg/L | |
| Mahaska | 75 | 100% | 0.4 | 7 mg/L | |
| Pottawattamie | 102 | 100% | 0.35 | 5.2 mg/L | |
| Dallas | 148 | 100% | 0.33 | 20 mg/L | |
| Madison | 31 | 100% | 1.2 | 6.2 mg/L | |
| Van Buren | 96 | 100% | 1 | 212 mg/L | |
| Greene | 149 | 100% | 0.45 | 12 mg/L | |
| Appanoose | 38 | 100% | 2.8 | 4.1 mg/L | |
| Jefferson | 67 | 97% | 0.7 | 5 mg/L | |
| Mills | 70 | 100% | 0.3 | 6 mg/L | |
| Boone | 71 | 100% | 0.44 | 6 mg/L | |
| Ida | 152 | 100% | 0.35 | 7 mg/L | |
| Pocahontas | 78 | 100% | 0.4 | 5 mg/L |
- Jefferson, Greene County10% of 30
- Crocker township, Polk County6% of 36
- Washington township, Washington County4% of 49
- Nevada township, Story County3% of 31
- Port Louisa township, Louisa County3% of 32
- Union township, Crawford County3% of 36
- Monroe township, Linn County3% of 36
- Grinnell, Poweshiek County2% of 43
- Corwin township, Ida County2% of 47
- Decorah township, Winneshiek County2% of 57
- Sioux City, Woodbury County2% of 130
- Pleasant township, Hardin County0% of 159
- Waverly, Bremer County0% of 31
- Hardin township, Hardin County0% of 52
- Forest township, Winnebago County0% of 34
- Richland township, Sac County0% of 31
- Perry township, Buchanan County0% of 35
- West Bend township, Palo Alto County0% of 30
- Lake Prairie township, Marion County0% of 35
- Remsen township, Plymouth County0% of 36
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.