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EWG's Tap Water Database — 2019 UPDATE

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MTBE

South Coast Water District - Capistrano Beach

MTBE was used as gasoline oxygenation additive to boost the octane number. In 2005, MTBE was replaced by ethanol as a gasoline additive. MTBE causes cancers in rats.

 

45

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND110ND
2013ND110ND
2014ND120ND
2015N/A00N/A
2016N/A00N/A
2017ND110ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 13 ppb

The EWG Health Guideline of 13 ppb for MTBE was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2012-01-031805-007-1037ND
2012-01-181805-007-1101ND
2012-02-011805-007-1124ND
2012-03-071805-007-0937ND
2012-04-041805-007-1420ND
2012-05-021805-007-1014ND
2012-06-061805-007-0939ND
2012-07-031805-007-0959ND
2012-08-011805-007-1058ND
2012-09-051805-007-1228ND
2012-10-031805-007-1133ND
2013-01-031805-007-1145ND
2013-01-091805-007-1101ND
2013-02-061805-007-1042ND
2013-03-061805-007-1324ND
2013-04-031805-007-1119ND
2013-05-021805-007-1053ND
2013-06-051805-007-1052ND
2013-07-031805-007-1056ND
2013-10-021805-007-1524ND
2013-11-061805-007-1354ND
2013-12-041805-007-1129ND
2014-01-081805-007-1334ND
2014-01-131805-007-0755ND
2014-01-291805-007-1324ND
2014-02-051805-007-1316ND
2014-02-191805-007-1424ND
2014-03-051805-007-1126ND
2014-04-021805-007-1154ND
2014-05-071805-007-1444ND
2014-06-111805-007-1326ND
2014-07-021805-007-1252ND
2014-08-061805-007-1342ND
2014-09-021805-007-1426ND
2017-02-211805-010-1615ND
2017-02-211805-007-1618ND
2017-03-071805-007-1122ND
2017-05-021805-007-1118ND
2017-06-061805-007-1123ND
2017-07-051805-007-1402ND
2017-08-011805-007-1138ND
2017-09-061805-007-1132ND
2017-10-181805-007-1209ND
2017-11-071805-007-1123ND
2017-12-061805-007-1134ND