Fluoride in Drinking Water
Reference information plus historical EPA compliance records associated with fluoride.
EPA Limit (MCL)
4000 ppb
EPA Goal (MCLG)
4000 ppb
Category
Inorganic
Regulatory values are a concise reference, not legal or medical advice. Confirm the current standard and rule-specific details on EPA.gov.
Health Effects
Bone disease (pain, tenderness), dental fluorosis in children
Common Sources
Natural deposits, water additive for dental health
Treatment Considerations for Fluoride
Commonly cited treatment approaches include: Reverse osmosis, activated alumina. Choose treatment only after a certified water test identifies the substance and concentration; verify NSF/ANSI certification and consult a qualified local professional when needed.
13,800
Historical Violation Records
6,780
Systems With Records
Historical Fluoride Records by State
| State | Records | Systems |
|---|---|---|
| Pennsylvania | 2,083 | 1,037 |
| Texas | 1,842 | 325 |
| Washington | 1,836 | 1,132 |
| North Carolina | 889 | 577 |
| Alaska | 834 | 287 |
| Arizona | 655 | 340 |
| Virginia | 646 | 181 |
| Ohio | 570 | 396 |
| Utah | 449 | 234 |
| Iowa | 331 | 225 |
| California | 325 | 68 |
| New Mexico | 308 | 75 |
| Connecticut | 296 | 157 |
| Oregon | 281 | 233 |
| Montana | 276 | 146 |
| Colorado | 231 | 141 |
| New Jersey | 228 | 170 |
| Illinois | 186 | 117 |
| West Virginia | 183 | 79 |
| Arkansas | 134 | 31 |
Systems With the Most Fluoride Violation Records
SEVEN ESTATES
RIDGEFIELD PUBLIC WORKS
PLOTT ACRES
RESCUE WATERWORKS
VALLEY ESTATES
WILLING WORKERS CLUB
RIVERSIDE CSA #122-MESA VERDE
LORDSBURG WATER SUPPLY SYSTEM
CSWR SOUTHWEST GARDEN WATER
BORDEN COUNTY WATER SYSTEM
Frequently Asked Questions
What is Fluoride and why can it appear in drinking-water records?
Fluoride can be associated with drinking water through: Natural deposits, water additive for dental health.
What reference value does this page show?
The summarized EPA Maximum Contaminant Level is 4000 ppb. Some substances use action levels or rule-specific thresholds instead, so verify the current EPA standard.
Does a historical violation record mean it is in my tap today?
No. A compliance record may be historical or resolved. Use the latest Consumer Confidence Report or a certified test for current local conditions.