The Power of Information

National Drinking Water Database

Metropolitan Water District of Southern California Utilities - Los Angeles, CA

Serves 17,000,000 people


Tritium is a pollutant from commercial nuclear reactors, research reactors and government weapons production plants.
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
0 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
0 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
11 days
Tests ConductedNumber of individual tests done for this contaminant
62 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
TritiumTritium is a pollutant from commercial nuclear reactors, research reactors and government weapons production plants.110.56 pCi/L
310.88 pCi/L
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
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 Tritium

Health Based Limits for Tritium

There are no health based standards that EWG is using for this chemical

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2008-10-06132.41 pCi/L8011.4 to 332 pCi/L
2008-07-07122.26 pCi/L7011.4 to 270 pCi/L
2008-04-0829.4 pCi/L1029.4 pCi/L
2008-04-0780.8 pCi/L720 to 169 pCi/L
2008-01-0742.01 pCi/L730 to 136 pCi/L
2006-04-050 pCi/L110 pCi/L
2006-04-0324.31 pCi/L860 to 121 pCi/L
2006-01-03310.88 pCi/L80147 to 393 pCi/L
2005-10-0322.06 pCi/L860 to 99.3 pCi/L
2005-07-06165 pCi/L10165 pCi/L
2005-07-05287 pCi/L60199 to 390 pCi/L