Chromium in Drinking Water
Reference information plus historical EPA compliance records associated with chromium.
EPA Limit (MCL)
100 ppb
EPA Goal (MCLG)
100 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
Allergic dermatitis
Common Sources
Discharge from steel and pulp mills, natural deposits
Treatment Considerations for Chromium
Commonly cited treatment approaches include: Reverse osmosis, ion exchange. 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.
9,836
Historical Violation Records
6,212
Systems With Records
Historical Chromium Records by State
| State | Records | Systems |
|---|---|---|
| Pennsylvania | 2,012 | 1,014 |
| Washington | 1,703 | 1,116 |
| North Carolina | 926 | 596 |
| Alaska | 676 | 279 |
| Arizona | 477 | 314 |
| Ohio | 463 | 344 |
| Utah | 443 | 243 |
| Oregon | 263 | 225 |
| Connecticut | 256 | 150 |
| New Jersey | 248 | 173 |
| Colorado | 229 | 153 |
| Iowa | 223 | 192 |
| Montana | 194 | 128 |
| Virginia | 186 | 153 |
| West Virginia | 182 | 86 |
| Texas | 134 | 69 |
| Kentucky | 127 | 84 |
| Tennessee | 118 | 86 |
| Puerto Rico | 109 | 85 |
| Vermont | 97 | 73 |
Systems With the Most Chromium Violation Records
RIDGEFIELD PUBLIC WORKS
SEVEN ESTATES
COAL MOUNTAIN WATER
NOTTINGHAM MANOR M H COURT
FRANKLIN WATER SYSTEMS 3
PA AMERICAN AUDUBON
WASHINGTON TOWNSHIP MUA
MOUNT EAGLE WATER ASSOC
HIAWATHA WATER
AKHIOK
Frequently Asked Questions
What is Chromium and why can it appear in drinking-water records?
Chromium can be associated with drinking water through: Discharge from steel and pulp mills, natural deposits.
What reference value does this page show?
The summarized EPA Maximum Contaminant Level is 100 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.