The Power of Information

National Drinking Water Database

Anaheim Public Utilities Utilities - Anaheim, CA

Serves 345,556 people


MTBE (methyl tert-butyl ether) is a fuel additive that had been used as an octane enhancer in unleaded gasoline; it contaminates groundwater due to spillage or leakage at gas stations, and has been banned or scheduled for phaseout in most states.
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
95 days
Tests ConductedNumber of individual tests done for this contaminant
358 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
MTBEMTBE (methyl tert-butyl ether) is a fuel additive that had been used as an octane enhancer in unleaded gasoline; it contaminates groundwater due to spillage or leakage at gas stations, and has been banned or scheduled for phaseout in most states.0 ppb
0 ppb
13 ppb
Legal 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 MTBE

Health Based Limits for MTBE

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.13 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2009-03-230 ppb110 ppb
2009-02-050 ppb440 ppb
2009-01-160 ppb110 ppb
2009-01-150 ppb220 ppb
2009-01-120 ppb110 ppb
2009-01-080 ppb660 ppb
2009-01-050 ppb770 ppb
2008-12-170 ppb110 ppb
2008-11-030 ppb110 ppb
2008-10-020 ppb660 ppb
2008-10-010 ppb880 ppb
2008-08-110 ppb220 ppb
2008-07-300 ppb220 ppb
2008-07-140 ppb220 ppb
2008-07-070 ppb550 ppb
2008-07-010 ppb990 ppb
2008-06-160 ppb220 ppb
2008-05-120 ppb110 ppb
2008-04-020 ppb16160 ppb
2008-03-240 ppb110 ppb
2008-02-040 ppb110 ppb
2008-01-300 ppb110 ppb
2008-01-180 ppb110 ppb
2008-01-020 ppb13130 ppb
2007-11-050 ppb110 ppb
2007-10-020 ppb770 ppb
2007-10-010 ppb660 ppb
2007-07-260 ppb110 ppb
2007-07-030 ppb660 ppb
2007-07-020 ppb770 ppb
2007-06-130 ppb220 ppb
2007-04-180 ppb220 ppb
2007-04-100 ppb660 ppb
2007-04-030 ppb440 ppb
2007-04-020 ppb550 ppb
2007-01-040 ppb880 ppb
2007-01-030 ppb330 ppb
2007-01-020 ppb550 ppb
2006-10-040 ppb440 ppb
2006-10-030 ppb440 ppb
2006-10-020 ppb660 ppb
2006-07-250 ppb220 ppb
2006-07-120 ppb440 ppb
2006-07-110 ppb550 ppb
2006-07-100 ppb440 ppb
2006-04-050 ppb220 ppb
2006-04-040 ppb11110 ppb
2006-01-250 ppb110 ppb
2006-01-040 ppb660 ppb
2006-01-030 ppb990 ppb
2005-10-310 ppb110 ppb
2005-10-040 ppb770 ppb
2005-10-030 ppb330 ppb
2005-08-290 ppb110 ppb
2005-08-160 ppb110 ppb
2005-08-080 ppb220 ppb
2005-07-070 ppb550 ppb
2005-07-060 ppb330 ppb
2005-07-050 ppb330 ppb
2005-06-270 ppb110 ppb
2005-06-200 ppb440 ppb
2005-05-310 ppb110 ppb
2005-05-130 ppb110 ppb
2005-04-200 ppb440 ppb
2005-04-180 ppb110 ppb
2005-04-110 ppb660 ppb
2005-04-060 ppb440 ppb
2005-04-050 ppb550 ppb
2005-03-250 ppb440 ppb
2005-02-220 ppb220 ppb
2005-01-270 ppb110 ppb
2005-01-040 ppb880 ppb
2005-01-030 ppb660 ppb
2004-11-080 ppb220 ppb
2004-10-150 ppb110 ppb
2004-10-130 ppb660 ppb
2004-10-120 ppb440 ppb
2004-10-110 ppb330 ppb
2004-08-230 ppb110 ppb
2004-08-160 ppb220 ppb
2004-07-150 ppb880 ppb
2004-07-120 ppb550 ppb
2004-06-100 ppb110 ppb
2004-04-220 ppb220 ppb
2004-04-150 ppb110 ppb
2004-04-130 ppb110 ppb
2004-04-070 ppb880 ppb
2004-04-060 ppb330 ppb
2004-03-080 ppb440 ppb
2004-02-040 ppb220 ppb
2004-01-220 ppb110 ppb
2004-01-150 ppb330 ppb
2004-01-140 ppb330 ppb
2004-01-130 ppb770 ppb
2004-01-120 ppb110 ppb