Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

MTBE

San Juan Basin Authority

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.

MORE ABOUT THIS CONTAMINANT

 

592

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND1770ND
2015ND1160ND
2016ND810ND
2017ND1040ND
2018ND890ND
2019ND250ND

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
2014-01-079590-001-1045ND
2014-01-079590-002-1000ND
2014-01-079590-003-0938ND
2014-01-079590-004-1030ND
2014-01-079590-014-1130ND
2014-01-079590-015-1155ND
2014-01-079590-017-0912ND
2014-01-149590-010-1039ND
2014-01-149590-013-0831ND
2014-01-149590-016-1018ND
2014-01-149590-017-1024ND
2014-01-229590-005-1030ND
2014-01-229590-006-1145ND
2014-01-229590-017-0955ND
2014-01-289590-017-0925ND
2014-02-049590-001-1040ND
2014-02-049590-003-1218ND
2014-02-049590-004-1239ND
2014-02-049590-005-0959ND
2014-02-049590-014-1314ND
2014-02-049590-015-1339ND
2014-02-049590-017-0947ND
2014-02-119590-002-0945ND
2014-02-119590-006-0839ND
2014-02-119590-010-1058ND
2014-02-119590-010-1219ND
2014-02-119590-013-1041ND
2014-02-119590-016-1210ND
2014-02-119590-017-1203ND
2014-02-199590-017-1036ND
2014-02-259590-017-0930ND
2014-03-049590-001-0940ND
2014-03-049590-002-1015ND
2014-03-049590-003-1039ND
2014-03-049590-004-1105ND
2014-03-049590-005-1120ND
2014-03-049590-006-0830ND
2014-03-049590-014-0905ND
2014-03-049590-015-0750ND
2014-03-049590-017-1207ND
2014-03-139590-010-0809ND
2014-03-139590-010-1217ND
2014-03-139590-013-0748ND
2014-03-139590-016-1208ND
2014-03-139590-017-1157ND
2014-03-189590-017-1107ND
2014-03-259590-017-1146ND
2014-04-019590-017-1153ND
2014-04-089590-001-0954ND
2014-04-089590-002-1018ND
2014-04-089590-003-1039ND
2014-04-089590-004-1105ND
2014-04-089590-005-1115ND
2014-04-089590-006-0913ND
2014-04-089590-014-0842ND
2014-04-089590-015-0758ND
2014-04-089590-017-1201ND
2014-04-159590-010-1052ND
2014-04-159590-010-1344ND
2014-04-159590-013-1328ND
2014-04-159590-016-1038ND
2014-04-159590-017-1029ND
2014-04-229590-017-1121ND
2014-04-299590-017-1150ND
2014-05-069590-001-1008ND
2014-05-069590-002-1046ND
2014-05-069590-003-1116ND
2014-05-069590-004-1020ND
2014-05-069590-005-1130ND
2014-05-069590-006-0930ND
2014-05-069590-014-0844ND
2014-05-069590-015-0758ND
2014-05-069590-017-1210ND
2014-05-139590-010-1029ND
2014-05-139590-010-1125ND
2014-05-139590-013-1105ND
2014-05-139590-016-1022ND
2014-05-139590-017-1017ND
2014-05-209590-017-1049ND
2014-05-289590-017-1121ND
2014-06-039590-001-0942ND
2014-06-039590-002-1038ND
2014-06-039590-003-1010ND
2014-06-039590-004-1109ND
2014-06-039590-005-1125ND
2014-06-039590-006-0900ND
2014-06-039590-014-0820ND
2014-06-039590-015-0750ND
2014-06-039590-017-1210ND
2014-06-109590-010-0929ND
2014-06-109590-010-1058ND
2014-06-109590-013-1028ND
2014-06-109590-016-0919ND
2014-06-109590-017-0908ND
2014-06-179590-017-1052ND
2014-06-249590-017-1030ND
2014-07-019590-017-1115ND
2014-07-089590-002-0950ND
2014-07-089590-003-0915ND
2014-07-089590-004-1020ND
2014-07-089590-005-1050ND
2014-07-089590-014-0825ND
2014-07-089590-015-0738ND
2014-07-089590-017-1152ND
2014-07-159590-006-0756ND
2014-07-159590-010-1034ND
2014-07-159590-010-1322ND
2014-07-159590-013-1117ND
2014-07-159590-016-1018ND
2014-07-159590-017-1000ND
2014-07-229590-017-1024ND
2014-07-299590-017-0936ND
2014-08-059590-003-1000ND
2014-08-059590-004-1035ND
2014-08-059590-005-1105ND
2014-08-059590-006-0920ND
2014-08-059590-014-0835ND
2014-08-059590-015-0750ND
2014-08-059590-017-1212ND
2014-08-129590-010-0839ND
2014-08-129590-016-1148ND
2014-08-129590-017-1143ND
2014-08-199590-017-1231ND
2014-08-269590-017-1048ND
2014-09-039590-001-1300ND
2014-09-039590-003-1338ND
2014-09-039590-004-1354ND
2014-09-039590-005-1222ND
2014-09-039590-006-1431ND
2014-09-039590-014-1450ND
2014-09-039590-015-1515ND
2014-09-039590-017-1058ND
2014-09-099590-010-0935ND
2014-09-099590-016-1420ND
2014-09-099590-017-1409ND
2014-09-169590-017-1130ND
2014-09-239590-002-1315ND
2014-09-239590-017-1239ND
2014-09-309590-017-1150ND
2014-10-079590-001-0945ND
2014-10-079590-002-1015ND
2014-10-079590-004-1045ND
2014-10-079590-005-1130ND
2014-10-079590-006-0830ND
2014-10-079590-017-1409ND
2014-10-149590-010-0820ND
2014-10-149590-016-1133ND
2014-10-149590-017-1128ND
2014-10-219590-017-1103ND
2014-10-289590-017-1100ND
2014-11-049590-001-0835ND
2014-11-049590-002-0908ND
2014-11-049590-004-0926ND
2014-11-049590-005-1100ND
2014-11-049590-006-1028ND
2014-11-049590-017-1211ND
2014-11-119590-010-1044ND
2014-11-119590-016-1053ND
2014-11-119590-017-1038ND
2014-11-189590-017-1047ND
2014-11-259590-003-0909ND
2014-11-259590-014-0838ND
2014-11-259590-015-0750ND
2014-11-259590-017-1147ND
2014-12-029590-001-1115ND
2014-12-029590-002-1140ND
2014-12-029590-003-1205ND
2014-12-029590-004-1221ND
2014-12-029590-005-1400ND
2014-12-029590-006-1039ND
2014-12-029590-017-1344ND
2014-12-099590-010-0949ND
2014-12-099590-016-1233ND
2014-12-099590-017-1226ND
2014-12-169590-017-1054ND
2014-12-239590-017-1238ND
2014-12-309590-017-1145ND
2015-01-079590-001-0810ND
2015-01-079590-002-0825ND
2015-01-079590-003-0842ND
2015-01-079590-004-0903ND
2015-01-079590-005-0948ND
2015-01-079590-006-0735ND
2015-01-079590-017-1055ND
2015-01-139590-010-0918ND
2015-01-139590-016-1011ND
2015-01-139590-017-1016ND
2015-01-229590-017-1115ND
2015-01-279590-017-1040ND
2015-02-039590-002-0940ND
2015-02-039590-003-1025ND
2015-02-039590-004-1044ND
2015-02-039590-005-1120ND
2015-02-039590-006-0900ND
2015-02-039590-017-1150ND
2015-02-109590-010-1518ND
2015-02-109590-016-1433ND
2015-02-109590-017-1524ND
2015-02-179590-017-1032ND
2015-02-249590-017-1057ND
2015-03-039590-002-1018ND
2015-03-039590-003-1042ND
2015-03-039590-004-1109ND
2015-03-039590-005-1130ND
2015-03-039590-006-0930ND
2015-03-039590-017-1228ND
2015-03-109590-010-0957ND
2015-03-109590-016-0910ND
2015-03-109590-017-1007ND
2015-03-179590-017-1048ND
2015-03-249590-017-0950ND
2015-03-319590-017-1120ND
2015-04-079590-001-1208ND
2015-04-079590-002-1230ND
2015-04-079590-003-1247ND
2015-04-079590-004-1308ND
2015-04-079590-005-1130ND
2015-04-079590-006-1330ND
2015-04-079590-017-1025ND
2015-04-149590-010-0950ND
2015-04-149590-016-1049ND
2015-04-149590-017-1054ND
2015-04-219590-017-1017ND
2015-04-289590-017-1005ND
2015-05-059590-002-0850ND
2015-05-059590-003-0910ND
2015-05-059590-004-0926ND
2015-05-059590-017-1025ND
2015-05-139590-010-0850ND
2015-05-139590-016-1015ND
2015-05-139590-017-1020ND
2015-05-199590-017-1030ND
2015-05-299590-004-0831ND
2015-05-299590-017-0943ND
2015-06-029590-002-0940ND
2015-06-029590-003-0918ND
2015-06-029590-004-1008ND
2015-06-029590-006-0858ND
2015-06-029590-017-1133ND
2015-06-099590-010-0723ND
2015-06-099590-016-0812ND
2015-06-099590-017-0817ND
2015-08-129590-001-1013ND
2015-08-129590-002-0949ND
2015-08-129590-003-0955ND
2015-08-129590-004-1005ND
2015-08-129590-005-1020ND
2015-08-129590-006-1045ND
2015-08-129590-014-1055ND
2015-08-129590-015-1108ND
2015-08-249590-002-1308ND
2015-08-249590-003-1313ND
2015-08-249590-004-1319ND
2015-08-259590-001-0816ND
2015-08-259590-005-0833ND
2015-08-259590-006-0805ND
2015-08-259590-014-0755ND
2015-08-259590-015-0708ND
2015-08-319590-010-0910ND
2015-09-089590-002-0840ND
2015-09-089590-003-0910ND
2015-09-089590-004-0938ND
2015-09-159590-010-1021ND
2015-10-069590-002-0847ND
2015-10-069590-003-0913ND
2015-10-069590-004-0939ND
2015-10-139590-010-1140ND
2015-10-139590-016-1145ND
2015-10-139590-017-1136ND
2015-10-209590-017-1041ND
2015-10-279590-017-1025ND
2015-11-039590-017-1010ND
2015-11-099590-010-0908ND
2015-11-099590-016-0905ND
2015-11-099590-017-0853ND
2015-11-179590-017-1022ND
2015-11-249590-017-0736ND
2015-11-309590-002-1118ND
2015-11-309590-003-1130ND
2015-11-309590-004-1141ND
2015-12-019590-017-1040ND
2015-12-079590-017-0934ND
2015-12-159590-010-0823ND
2015-12-159590-016-0848ND
2015-12-159590-017-0945ND
2015-12-229590-001-1135ND
2015-12-229590-002-1041ND
2015-12-229590-003-1046ND
2015-12-229590-004-1055ND
2015-12-229590-014-1149ND
2015-12-229590-015-1300ND
2015-12-229590-017-0930ND
2015-12-289590-017-1049ND
2016-01-049590-017-0927ND
2016-01-119590-010-0810ND
2016-01-119590-016-1030ND
2016-01-119590-017-1035ND
2016-01-189590-017-0854ND
2016-01-199590-001-1020ND
2016-01-199590-002-1046ND
2016-01-199590-003-1056ND
2016-01-199590-004-1105ND
2016-01-199590-006-0825ND
2016-01-259590-001-1059ND
2016-01-259590-002-0808ND
2016-01-259590-003-0817ND
2016-01-259590-004-0823ND
2016-01-259590-006-1114ND
2016-01-259590-017-0946ND
2016-02-019590-017-1047ND
2016-02-089590-001-1000ND
2016-02-089590-002-1027ND
2016-02-089590-003-1040ND
2016-02-089590-004-1052ND
2016-02-089590-005-1110ND
2016-02-089590-006-0840ND
2016-02-089590-014-0852ND
2016-02-089590-015-0909ND
2016-02-089590-017-1103ND
2016-02-159590-010-0900ND
2016-02-159590-016-0802ND
2016-02-159590-017-0848ND
2016-02-239590-017-0948ND
2016-03-079590-001-0815ND
2016-03-079590-002-0830ND
2016-03-079590-003-0841ND
2016-03-079590-004-0853ND
2016-03-079590-017-0955ND
2016-03-149590-010-0913ND
2016-03-149590-016-1000ND
2016-03-149590-017-0957ND
2016-03-219590-017-0955ND
2016-03-289590-017-1015ND
2016-04-049590-001-0815ND
2016-04-049590-002-1110ND
2016-04-049590-003-1120ND
2016-04-049590-004-1130ND
2016-04-049590-005-1058ND
2016-04-119590-017-1000ND
2016-04-189590-010-0850ND
2016-04-189590-016-0955ND
2016-04-189590-017-0953ND
2016-04-259590-017-0945ND
2016-05-039590-017-1045ND
2016-05-099590-010-0808ND
2016-05-099590-016-0907ND
2016-05-099590-017-0901ND
2016-05-179590-001-0928ND
2016-05-179590-002-0822ND
2016-05-179590-003-0845ND
2016-05-179590-004-0911ND
2016-05-179590-005-1010ND
2016-05-179590-015-0745ND
2016-05-179590-017-1113ND
2016-05-239590-017-1009ND
2016-07-059590-002-0943ND
2016-07-059590-003-1002ND
2016-07-059590-004-1020ND
2016-07-059590-015-1045ND
2016-07-059590-017-0913ND
2016-07-129590-010-0815ND
2016-07-129590-016-1041ND
2016-07-129590-017-1035ND
2016-07-189590-017-0938ND
2016-07-269590-017-0956ND
2016-08-019590-002-0836ND
2016-08-019590-003-0906ND
2016-08-019590-004-0945ND
2016-08-019590-017-1219ND
2016-08-089590-010-0824ND
2016-08-089590-016-0935ND
2016-08-089590-017-0939ND
2016-08-159590-017-1009ND
2016-08-239590-017-1042ND
2017-02-069590-017-1256ND
2017-02-099590-002-0850ND
2017-02-099590-003-0930ND
2017-02-099590-004-1000ND
2017-02-279590-017-1143ND
2017-03-029590-017-1242ND
2017-03-069590-002-0840ND
2017-03-069590-003-0907ND
2017-03-069590-004-0932ND
2017-03-139590-017-1304ND
2017-03-149590-010-0845ND
2017-03-149590-016-0738ND
2017-03-209590-017-1050ND
2017-03-279590-017-1054ND
2017-04-039590-002-0840ND
2017-04-039590-003-0900ND
2017-04-039590-004-0927ND
2017-04-039590-017-1145ND
2017-04-109590-010-1000ND
2017-04-109590-016-1208ND
2017-04-109590-017-1218ND
2017-04-179590-017-1059ND
2017-04-249590-017-1047ND
2017-05-019590-017-1124ND
2017-05-089590-017-1315ND
2017-05-119590-011-1032ND
2017-05-129590-002-0745ND
2017-05-129590-003-0805ND
2017-05-129590-004-0823ND
2017-05-129590-010-1010ND
2017-05-129590-016-0843ND
2017-05-159590-017-1234ND
2017-05-229590-017-1232ND
2017-05-309590-017-1240ND
2017-07-059590-002-0820ND
2017-07-059590-003-0847ND
2017-07-059590-004-0911ND
2017-07-059590-017-1349ND
2017-07-109590-010-1532ND
2017-07-109590-017-1514ND
2017-07-119590-016-0758ND
2017-07-179590-017-0957ND
2017-08-039590-001-1423ND
2017-08-039590-005-1323ND
2017-08-039590-017-1217ND
2017-08-079590-017-1155ND
2017-08-089590-001-0820ND
2017-08-089590-002-0910ND
2017-08-089590-003-1012ND
2017-08-089590-005-1105ND
2017-08-159590-010-1125ND
2017-08-159590-016-1344ND
2017-08-159590-017-1352ND
2017-08-219590-017-1209ND
2017-08-289590-017-1048ND
2017-09-059590-001-0840ND
2017-09-059590-002-0910ND
2017-09-059590-003-0958ND
2017-09-059590-005-1056ND
2017-09-059590-017-1400ND
2017-09-119590-010-1015ND
2017-09-119590-013-0825ND
2017-09-119590-016-1310ND
2017-09-119590-017-1322ND
2017-09-189590-017-1257ND
2017-09-289590-002-0825ND
2017-09-289590-003-0845ND
2017-09-289590-004-0915ND
2017-09-289590-017-1240ND
2017-10-029590-010-1200ND
2017-10-029590-013-1255ND
2017-10-029590-016-1330ND
2017-10-029590-017-1430ND
2017-10-099590-001-0910ND
2017-10-099590-002-1000ND
2017-10-099590-003-1032ND
2017-10-099590-004-1055ND
2017-10-099590-005-1140ND
2017-10-099590-017-1345ND
2017-10-169590-017-1226ND
2017-10-239590-017-1200ND
2017-10-309590-017-1203ND
2017-11-069590-001-0915ND
2017-11-069590-002-1000ND
2017-11-069590-003-1045ND
2017-11-069590-004-1125ND
2017-11-069590-005-1210ND
2017-11-069590-010-1145ND
2017-11-069590-013-1014ND
2017-11-069590-016-1337ND
2017-11-069590-017-1348ND
2017-11-139590-017-1258ND
2017-11-209590-017-1226ND
2017-11-279590-017-1239ND
2017-12-049590-001-1315ND
2017-12-049590-002-1358ND
2017-12-049590-003-1435ND
2017-12-049590-004-1505ND
2017-12-049590-005-1150ND
2017-12-049590-017-1129ND
2017-12-119590-010-1020ND
2017-12-119590-013-1100ND
2017-12-119590-016-1324ND
2017-12-119590-017-1335ND
2018-01-039590-001-0754ND
2018-01-039590-002-0827ND
2018-01-039590-003-0858ND
2018-01-039590-004-0926ND
2018-01-039590-005-1034ND
2018-01-089590-010-1250ND
2018-01-089590-013-1210ND
2018-02-059590-001-0925ND
2018-02-059590-002-0959ND
2018-02-059590-003-1040ND
2018-02-059590-004-1110ND
2018-02-059590-005-1155ND
2018-02-129590-010-1145ND
2018-02-129590-013-1228ND
2018-02-219590-001-0845ND
2018-02-219590-005-1006ND
2018-03-059590-001-0959ND
2018-03-059590-002-1032ND
2018-03-059590-003-1115ND
2018-03-059590-004-1140ND
2018-03-059590-005-1214ND
2018-03-219590-010-1030ND
2018-03-219590-013-0957ND
2018-04-132920-001-0913ND
2018-04-139590-001-0913ND
2018-04-132920-002-0955ND
2018-04-139590-002-0955ND
2018-04-139590-003-1045ND
2018-04-132920-004-1120ND
2018-04-139590-004-1120ND
2018-04-132920-005-1215ND
2018-04-139590-005-1215ND
2018-04-139590-010-1330ND
2018-04-139590-013-1428ND
2018-05-099590-001-0900ND
2018-05-099590-002-0945ND
2018-05-099590-003-1025ND
2018-05-099590-004-1055ND
2018-05-099590-005-1140ND
2018-05-149590-010-1118ND
2018-05-149590-013-1210ND
2018-06-049590-001-1345ND
2018-06-049590-002-1410ND
2018-06-049590-003-1433ND
2018-06-049590-004-1500ND
2018-06-049590-005-1125ND
2018-06-139590-010-1130ND
2018-06-139590-013-1220ND
2018-07-029590-001-0915ND
2018-07-029590-002-0951ND
2018-07-029590-003-1033ND
2018-07-029590-004-1110ND
2018-07-029590-005-1145ND
2018-07-099590-010-1015ND
2018-07-099590-013-1100ND
2018-08-089590-001-0845ND
2018-08-089590-002-0940ND
2018-08-089590-003-1030ND
2018-08-089590-004-1115ND
2018-08-089590-005-1200ND
2018-08-139590-010-1125ND
2018-08-139590-013-1215ND
2018-09-049590-001-0930ND
2018-09-049590-002-1015ND
2018-09-049590-003-1045ND
2018-09-049590-004-1120ND
2018-09-049590-005-1205ND
2018-09-139590-010-1115ND
2018-09-139590-013-1213ND
2018-10-029590-001-0900ND
2018-10-029590-002-0935ND
2018-10-029590-003-1015ND
2018-10-029590-004-1048ND
2018-10-029590-005-1125ND
2018-10-089590-010-1128ND
2018-10-089590-013-1220ND
2018-11-059590-001-0825ND
2018-11-059590-002-0855ND
2018-11-059590-003-0925ND
2018-11-059590-004-0955ND
2018-11-059590-005-1028ND
2018-11-129590-010-1030ND
2018-11-129590-013-1140ND
2018-12-079590-001-0850ND
2018-12-079590-002-0936ND
2018-12-079590-003-1010ND
2018-12-079590-004-1055ND
2018-12-079590-005-1135ND
2018-12-109590-010-1125ND
2019-03-274792-001-0750ND
2019-03-274792-003-0815ND
2019-03-274792-004-0800ND
2019-03-274792-005-0845ND
2019-03-274792-015-1100ND
2019-04-164792-001-1035ND
2019-04-164792-003-1100ND
2019-04-164792-004-1125ND
2019-04-164792-005-1300ND
2019-04-164792-006-0910ND
2019-04-164792-015-1215ND
2019-07-084792-001-0950ND
2019-07-084792-002-1035ND
2019-07-084792-003-1055ND
2019-07-084792-004-1020ND
2019-07-084792-005-1400ND
2019-07-084792-006-1315ND
2019-07-094792-015-0900ND
2019-10-154792-001-0740ND
2019-10-154792-002-1110ND
2019-10-154792-003-1135ND
2019-10-154792-004-1025ND
2019-10-154792-005-1345ND
2019-10-154792-006-0945ND
2019-10-154792-015-0845ND