Uranium in Drinking Water
Reference information plus historical EPA compliance records associated with uranium.
EPA Limit (MCL)
30 ppb
EPA Goal (MCLG)
0 ppb
Category
Radionuclides
Regulatory values are a concise reference, not legal or medical advice. Confirm the current standard and rule-specific details on EPA.gov.
Health Effects
Increased cancer risk, kidney toxicity
Common Sources
Erosion of natural deposits
Treatment Considerations for Uranium
Commonly cited treatment approaches include: Ion exchange, reverse osmosis. 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.
15,798
Historical Violation Records
2,617
Systems With Records
Historical Uranium Records by State
| State | Records | Systems |
|---|---|---|
| Mississippi | 9,169 | 595 |
| Pennsylvania | 1,179 | 570 |
| North Carolina | 638 | 110 |
| Oklahoma | 590 | 151 |
| Connecticut | 545 | 169 |
| Texas | 480 | 55 |
| California | 434 | 63 |
| Oregon | 363 | 186 |
| Nevada | 266 | 34 |
| Nebraska | 264 | 26 |
| Alaska | 252 | 84 |
| New Mexico | 204 | 22 |
| Arizona | 195 | 60 |
| Colorado | 170 | 74 |
| Utah | 152 | 63 |
| Virginia | 130 | 56 |
| Montana | 120 | 11 |
| Georgia | 119 | 54 |
| New Jersey | 74 | 26 |
| Illinois | 70 | 32 |
Systems With the Most Uranium Violation Records
WEST JACKSON CO UTILITY DIST
ROSEMOUNT WATER CO
NORTH LEE W/A #1-BARNES CROSNG
HARRISVILLE W/A
BUCKATUNNA WATER ASSOCIATION
CITY OF RIPLEY
VALLEY ESTATES
PECAN TREE WATER ASSN
CITY OF PONTOTOC
CITY OF ELLISVILLE
Frequently Asked Questions
What is Uranium and why can it appear in drinking-water records?
Uranium can be associated with drinking water through: Erosion of natural deposits.
What reference value does this page show?
The summarized EPA Maximum Contaminant Level is 30 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.