The Power of Information

National Drinking Water Database

Pomona - City, Water Dept. Utilities - Los Angeles, CA

Serves 156,500 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
7 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)
7 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
116 days
Tests ConductedNumber of individual tests done for this contaminant
148 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.94.36 ppb
1000 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
2009-03-0237 ppb210 to 74 ppb
2009-02-20180 ppb10180 ppb
2009-02-110 ppb110 ppb
2009-02-02170 ppb10170 ppb
2009-01-140 ppb110 ppb
2009-01-07140 ppb10140 ppb
2009-01-0613 ppb1013 ppb
2009-01-05110 ppb10110 ppb
2008-12-1710 ppb1010 ppb
2008-12-03150 ppb10150 ppb
2008-10-157.4 ppb107.4 ppb
2008-10-08140 ppb10140 ppb
2008-09-0538.5 ppb2016 to 61 ppb
2008-09-038 ppb108 ppb
2008-09-0218.45 ppb206.9 to 30 ppb
2008-08-136.6 ppb106.6 ppb
2008-08-06190 ppb10190 ppb
2008-08-050 ppb550 ppb
2008-07-2213 ppb1013 ppb
2008-07-150 ppb110 ppb
2008-07-088.3 ppb108.3 ppb
2008-07-02160 ppb10160 ppb
2008-06-177.8 ppb107.8 ppb
2008-05-286.7 ppb106.7 ppb
2008-05-149.9 ppb109.9 ppb
2008-05-06170 ppb10170 ppb
2008-04-070 ppb110 ppb
2008-04-023.7 ppb210 to 7.4 ppb
2008-04-01160 ppb10160 ppb
2008-03-265.5 ppb105.5 ppb
2008-03-050 ppb110 ppb
2008-03-04150 ppb10150 ppb
2008-03-0329 ppb210 to 58 ppb
2008-02-260 ppb220 ppb
2008-02-066 ppb210 to 12 ppb
2008-02-04160 ppb10160 ppb
2008-01-317.4 ppb107.4 ppb
2008-01-09160 ppb10160 ppb
2007-12-05160 ppb10160 ppb
2007-11-07170 ppb10170 ppb
2007-10-090 ppb110 ppb
2007-10-03160 ppb10160 ppb
2007-09-139.5 ppb210 to 19 ppb
2007-09-128.4 ppb108.4 ppb
2007-09-11178 ppb2056 to 300 ppb
2007-09-0590 ppb210 to 180 ppb
2007-08-08210 ppb10210 ppb
2007-07-0336 ppb1036 ppb
2007-06-06150 ppb10150 ppb
2007-05-03270 ppb10270 ppb
2007-05-01160 ppb10160 ppb
2007-04-171000 ppb101000 ppb
2007-04-03140 ppb10140 ppb
2007-03-287.5 ppb210 to 15 ppb
2007-03-2768.8 ppb309.4 to 180 ppb
2007-03-06130 ppb10130 ppb
2007-02-06380 ppb10380 ppb
2007-01-03150 ppb10150 ppb
2006-12-050.19 ppb100.19 ppb
2006-11-08130 ppb10130 ppb
2006-10-04170 ppb10170 ppb
2006-09-060.18 ppb100.18 ppb
2006-08-02180 ppb10180 ppb
2006-07-05170 ppb10170 ppb
2006-06-138.3 ppb108.3 ppb
2006-06-07250 ppb10250 ppb
2006-05-10160 ppb10160 ppb
2006-05-090 ppb110 ppb
2006-05-02140 ppb10140 ppb
2006-04-24150 ppb10150 ppb
2006-04-110 ppb110 ppb
2006-03-09120 ppb10120 ppb
2006-02-07170 ppb10170 ppb
2006-01-10170 ppb10170 ppb
2005-12-06100 ppb10100 ppb
2005-11-01120 ppb10120 ppb
2005-10-04170 ppb10170 ppb
2005-09-215.9 ppb105.9 ppb
2005-09-08160 ppb10160 ppb
2005-08-250 ppb110 ppb
2005-08-172.2 ppb540 to 11 ppb
2005-08-110 ppb330 ppb
2005-08-100 ppb220 ppb
2005-08-039.8 ppb109.8 ppb
2005-08-02110 ppb10110 ppb
2005-07-250 ppb110 ppb
2005-07-190 ppb110 ppb
2005-07-05150 ppb10150 ppb
2005-06-160 ppb220 ppb
2005-06-080 ppb110 ppb
2005-06-01160 ppb10160 ppb
2005-05-260 ppb220 ppb
2005-05-0480 ppb210 to 160 ppb
2005-04-26120 ppb10120 ppb
2005-04-2520.33 ppb320 to 61 ppb
2005-04-190 ppb110 ppb
2005-04-13140 ppb10140 ppb
2005-04-120 ppb110 ppb
2005-03-240 ppb220 ppb
2005-03-09170 ppb10170 ppb
2005-03-037.3 ppb107.3 ppb
2005-03-020 ppb110 ppb
2005-02-160 ppb330 ppb
2004-12-010 ppb110 ppb
2004-11-10170 ppb10170 ppb
2004-10-06120 ppb10120 ppb
2004-09-01160 ppb10160 ppb
2004-08-04160 ppb10160 ppb
2004-07-07160 ppb10160 ppb
2004-06-02190 ppb10190 ppb
2004-05-137.3 ppb107.3 ppb
2004-05-05140 ppb10140 ppb
2004-04-07140 ppb10140 ppb
2004-03-10210 ppb10210 ppb
2004-02-18180 ppb10180 ppb
2004-01-30210 ppb10210 ppb