The Power of Information

National Drinking Water Database

Alameda County Water District Utilities - Oakland, CA

Serves 271,000 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
31 days
Tests ConductedNumber of individual tests done for this contaminant
286 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.3.21 ppb
16.72 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
2009-02-190 ppb110 ppb
2009-01-2116.72 ppb520 to 41.39 ppb
2008-12-096.19 ppb106.19 ppb
2008-11-120 ppb110 ppb
2008-10-2814.11 ppb530 to 46.15 ppb
2008-07-234.06 ppb19160 to 48.14 ppb
2008-07-160 ppb660 ppb
2008-05-225.05 ppb105.05 ppb
2008-04-088.15 ppb520 to 22.02 ppb
2007-08-076.19 ppb106.19 ppb
2007-07-111.67 ppb1080 to 11.48 ppb
2007-07-106.98 ppb1170 to 34.82 ppb
2007-06-215.08 ppb105.08 ppb
2007-06-050 ppb110 ppb
2007-04-260 ppb110 ppb
2007-04-110 ppb550 ppb
2007-03-280 ppb220 ppb
2007-03-200 ppb110 ppb
2007-02-130 ppb14140 ppb
2007-02-120 ppb440 ppb
2006-10-250 ppb23230 ppb
2006-06-2114.25 ppb650 to 85.5 ppb
2006-06-200 ppb19190 ppb
2006-02-150 ppb18180 ppb
2005-11-142.63 ppb19180 to 50 ppb
2005-06-016.1 ppb21190 to 77 ppb
2005-02-230 ppb18180 ppb
2004-10-280 ppb21210 ppb
2004-06-152.44 ppb23220 to 56.2 ppb
2004-04-140 ppb110 ppb
2004-02-180 ppb22220 ppb