National Drinking Water Database
San Diego Water Department Utilities - San Diego, CA
Serves 1,281,400 people
Chromium (hexavalent)
Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.Testing Summary
| Contaminant | Average/ Maximum Result | Health Limit Exceeded | Legal Limit Exceeded | Testing History -Tested  -Detected  -Over Health Guidelines  -Over Legal Limit* |
|---|---|---|---|---|
| Chromium (hexavalent)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits. | 0 ppb 0 ppb | No | No 100 ppb |  |
| NOTE: Each dot in the above graph represents one month. * Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance. | ||||
Health Based and Legal Limits for Chromium (hexavalent)
Health Based Limits for Chromium (hexavalent)
| Standard | Description | Level |
|---|---|---|
| Maximum Contaminant Limit (MCL) | The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency. | 100 ppb |
Testing Results
| Testing Date | Average Result | Samples taken that day | Number of Non-Detects | Range of Results |
|---|---|---|---|---|
| 2009-02-02 | 0 ppb | 3 | 3 | 0 ppb |
| 2008-11-04 | 0 ppb | 1 | 1 | 0 ppb |
| 2008-11-03 | 0 ppb | 3 | 3 | 0 ppb |
| 2007-11-05 | 0 ppb | 4 | 4 | 0 ppb |