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National Drinking Water Database

California Water Service Co. - Ela Utilities - Los Angeles, CA

Serves 151,042 people

Ethyl-t-butyl ether (ETBE)

Ethyl-t-butyl ether is a synthetic chemical used as a fuel additive and an octane enhancer for gasoline.
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
15 days
Tests ConductedNumber of individual tests done for this contaminant
33 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Ethyl-t-butyl ether (ETBE)Ethyl-t-butyl ether is a synthetic chemical used as a fuel additive and an octane enhancer for gasoline.0 ppb
0 ppb
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 Ethyl-t-butyl ether (ETBE)

Health Based Limits for Ethyl-t-butyl ether (ETBE)

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
2009-01-020 ppb110 ppb
2008-07-090 ppb110 ppb
2008-03-170 ppb110 ppb
2007-05-110 ppb220 ppb
2007-05-100 ppb220 ppb
2005-08-160 ppb660 ppb
2005-05-310 ppb330 ppb
2005-05-240 ppb330 ppb
2005-05-170 ppb330 ppb
2005-04-050 ppb330 ppb
2004-11-220 ppb110 ppb
2004-09-070 ppb110 ppb
2004-08-110 ppb110 ppb
2004-05-180 ppb440 ppb
2004-04-220 ppb110 ppb