The Power of Information

National Drinking Water Database

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

Serves 17,000,000 people


Aluminum is a metal released from metal refineries and mining operations.
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
80 days
Tests ConductedNumber of individual tests done for this contaminant
332 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
AluminumAluminum is a metal released from metal refineries and mining operations.41.2 ppb
133.6 ppb
200 ppb
200 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 Aluminum

Health Based Limits for Aluminum

National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 200 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.600 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-0983.6 ppb520 to 190 ppb
2009-02-0976 ppb520 to 170 ppb
2009-01-1252 ppb530 to 150 ppb
2008-12-0873.8 ppb510 to 180 ppb
2008-11-1053.8 ppb510 to 80 ppb
2008-10-1350.57 ppb720 to 78 ppb
2008-10-060 ppb220 ppb
2008-09-0876 ppb510 to 120 ppb
2008-08-1174.2 ppb510 to 130 ppb
2008-07-14133.6 ppb510 to 280 ppb
2008-06-09118 ppb510 to 220 ppb
2008-05-12105 ppb620 to 260 ppb
2008-04-1489 ppb620 to 220 ppb
2008-04-090 ppb110 ppb
2008-04-070 ppb110 ppb
2008-04-01107.33 ppb3052 to 140 ppb
2008-03-3160 ppb210 to 120 ppb
2008-02-2765.4 ppb520 to 130 ppb
2008-01-3075.2 ppb510 to 120 ppb
2007-12-2673.4 ppb510 to 120 ppb
2007-11-2868 ppb520 to 120 ppb
2007-10-3172 ppb520 to 140 ppb
2007-10-0145 ppb850 to 140 ppb
2007-09-2681.8 ppb510 to 120 ppb
2007-08-2946.8 ppb520 to 90 ppb
2007-07-3134.6 ppb530 to 92 ppb
2007-06-2773 ppb510 to 100 ppb
2007-05-3054 ppb510 to 90 ppb
2007-04-3061.6 ppb510 to 110 ppb
2007-04-17110 ppb10110 ppb
2007-04-0228.29 ppb740 to 75 ppb
2007-03-2810.6 ppb540 to 53 ppb
2007-02-2814.8 ppb540 to 74 ppb
2007-01-3126.6 ppb530 to 70 ppb
2006-12-2732.8 ppb530 to 100 ppb
2006-12-040 ppb110 ppb
2006-11-2960.33 ppb310 to 110 ppb
2006-11-280 ppb110 ppb
2006-11-0187 ppb1087 ppb
2006-10-3136 ppb420 to 86 ppb
2006-10-0233 ppb740 to 87 ppb
2006-09-2737 ppb530 to 100 ppb
2006-09-050 ppb110 ppb
2006-09-0185.5 ppb2079 to 92 ppb
2006-08-310 ppb220 ppb
2006-07-3131.4 ppb530 to 88 ppb
2006-06-3018.5 ppb430 to 74 ppb
2006-05-3128.4 ppb530 to 87 ppb
2006-04-3012.6 ppb540 to 63 ppb
2006-04-030 ppb330 ppb
2006-03-300 ppb440 ppb
2006-02-280 ppb440 ppb
2006-01-3115.8 ppb540 to 79 ppb
2005-12-3031 ppb530 to 102 ppb
2005-11-3048.2 ppb530 to 123 ppb
2005-10-3145.2 ppb520 to 104 ppb
2005-10-1052 ppb1052 ppb
2005-10-0324.86 ppb750 to 104 ppb
2005-09-3049 ppb420 to 104 ppb
2005-09-2962 ppb1062 ppb
2005-08-3138.6 ppb530 to 126 ppb
2005-07-3142.2 ppb530 to 151 ppb
2005-06-3021.6 ppb540 to 108 ppb
2005-05-3152.2 ppb520 to 123 ppb
2005-04-300 ppb550 ppb
2005-04-1312.33 ppb650 to 74 ppb
2005-04-110 ppb110 ppb
2005-03-300 ppb440 ppb
2005-02-280 ppb550 ppb
2005-01-3130.4 ppb530 to 83 ppb
2005-01-1283 ppb1083 ppb
2004-12-087.8 ppb540 to 39 ppb
2004-11-1011 ppb430 to 44 ppb
2004-10-139.17 ppb650 to 55 ppb
2004-10-040 ppb110 ppb
2004-09-0819.5 ppb210 to 39 ppb
2004-08-1121 ppb210 to 42 ppb
2004-07-1441 ppb1041 ppb
2004-04-1421.89 ppb960 to 70 ppb
2004-04-050 ppb110 ppb