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EWG's Tap Water Database — 2021 UPDATE

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Trichloroethylene

City of Modesto

Trichloroethylene, an industrial solvent and common groundwater pollutant, damages the immune system, harms the developing fetus and causes cancer. Read More.

Trichloroethylene was once commonly used to remove grease from metal parts, such as steel pipes and engines, and as a solvent in dry cleaning and carpet cleaning products. Drinking trichloroethylene-contaminated drinking water has been linked with birth defects, leukemia, and liver and kidney damage. Trichloroethylene is highly volatile and can enter indoor air through water in pipes. If trichloroethylene is present, people can inhale it while bathing, washing dishes and doing other household activities that involve water.

Click here to read more about carcinogenic VOCs.

MORE ABOUT THIS CONTAMINANT

 

307

Samples

1

Samples exceeding legal limit (MCL)

59

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.127 ppb615ND - 2.30 ppb
20150.968 ppb5522ND - 5.10 ppb
20160.420 ppb476ND - 4.20 ppb
20170.194 ppb667ND - 4.20 ppb
20180.353 ppb4011ND - 2.00 ppb
20190.439 ppb388ND - 2.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for trichloroethylene was defined by the state of Minnesota as health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the developing fetus and damage to the immune system.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for trichloroethylene, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-081610-051-1142ND
2014-01-081610-146-0910ND
2014-02-121610-166-09001.30 ppb
2014-02-261610-166-08051.60 ppb
2014-03-051610-018-1025ND
2014-03-121610-166-11251.80 ppb
2014-03-261610-166-08002.30 ppb
2014-04-091610-003-1135ND
2014-04-091610-008-1325ND
2014-04-091610-009-1240ND
2014-06-041610-078-0930ND
2014-07-021610-078-0945ND
2014-07-021610-151-1110ND
2014-07-091610-003-1400ND
2014-07-091610-008-1305ND
2014-07-091610-009-1330ND
2014-07-091610-166-1138ND
2014-08-061610-078-0945ND
2014-08-131610-166-0835ND
2014-09-031610-035-0820ND
2014-09-031610-124-1230ND
2014-09-031610-147-1051ND
2014-09-031610-149-1012ND
2014-09-031610-154-1249ND
2014-09-101610-012-0740ND
2014-09-101610-031-0836ND
2014-09-101610-070-0752ND
2014-09-101610-130-0750ND
2014-09-101610-132-1220ND
2014-09-101610-133-1334ND
2014-09-101610-135-1205ND
2014-09-101610-137-0925ND
2014-09-101610-166-1005ND
2014-09-101610-172-0850ND
2014-09-101610-185-0955ND
2014-09-101610-187-0940ND
2014-09-101610-189-0915ND
2014-09-101610-196-0918ND
2014-09-171610-169-1211ND
2014-09-171610-170-1020ND
2014-09-171610-171-0920ND
2014-09-171610-186-1039ND
2014-09-171610-191-1128ND
2014-09-171610-193-1005ND
2014-09-181610-043-1335ND
2014-09-181610-047-1320ND
2014-09-181610-048-1010ND
2014-09-181610-062-0940ND
2014-09-181610-068-0910ND
2014-09-181610-097-1245ND
2014-09-181610-127-1400ND
2014-09-181610-234-1100ND
2014-10-011610-044-1000ND
2014-10-011610-078-0945ND
2014-10-081610-003-0740ND
2014-10-081610-009-0800ND
2014-10-081610-166-0920ND
2014-11-051610-078-0920ND
2014-11-131610-166-1015ND
2014-12-031610-078-1010ND
2014-12-161610-166-07550.740 ppb
2015-01-071610-078-09400.710 ppb
2015-01-071610-148-1038ND
2015-01-141610-003-0810ND
2015-01-141610-009-0835ND
2015-01-141610-166-09131.20 ppb
2015-02-041610-078-09400.660 ppb
2015-02-041610-243-0830ND
2015-02-111610-166-10502.20 ppb
2015-03-041610-018-1150ND
2015-03-041610-045-0915ND
2015-03-041610-050-1015ND
2015-03-041610-053-1250ND
2015-03-041610-078-10501.000 ppb
2015-03-041610-239-0950ND
2015-03-041610-241-1110ND
2015-03-111610-041-1315ND
2015-03-111610-129-1345ND
2015-03-111610-131-0840ND
2015-03-111610-166-09303.40 ppb
2015-03-111610-221-1055ND
2015-03-181610-226-1025ND
2015-03-251610-008-0718ND
2015-04-081610-003-0800ND
2015-04-081610-008-0850ND
2015-04-081610-009-0825ND
2015-04-081610-078-08101.10 ppb
2015-04-081610-166-09355.10 ppb
2015-05-061610-061-1035ND
2015-05-061610-078-09151.50 ppb
2015-05-141610-166-1020ND
2015-06-031610-078-09451.80 ppb
2015-06-101610-166-1107ND
2015-07-011610-078-09402.20 ppb
2015-07-081610-003-0900ND
2015-07-081610-009-0816ND
2015-07-081610-166-0725ND
2015-07-151610-049-0840ND
2015-08-051610-078-09402.50 ppb
2015-08-121610-166-0825ND
2015-09-021610-078-09352.60 ppb
2015-09-091610-166-0852ND
2015-09-301610-165-0910ND
2015-09-301610-191-0902ND
2015-10-071610-078-10252.40 ppb
2015-10-141610-003-0952ND
2015-10-141610-008-0858ND
2015-10-141610-009-0824ND
2015-10-141610-166-11170.580 ppb
2015-11-041610-078-10003.20 ppb
2015-11-091610-166-11452.20 ppb
2015-12-021610-078-09403.30 ppb
2015-12-091610-166-08453.90 ppb
2015-12-161610-078-08353.40 ppb
2015-12-161610-166-08304.70 ppb
2015-12-301610-078-08153.60 ppb
2016-01-061610-078-08053.30 ppb
2016-01-131610-003-0900ND
2016-01-131610-008-1007ND
2016-01-271610-078-07453.50 ppb
2016-02-031610-078-10303.70 ppb
2016-02-101610-009-1120ND
2016-02-171610-078-14194.20 ppb
2016-02-251610-166-1025ND
2016-03-021610-018-1315ND
2016-03-021610-078-10154.20 ppb
2016-03-091610-166-1120ND
2016-03-161610-078-0850ND
2016-04-061610-078-0935ND
2016-04-131610-003-1428ND
2016-04-131610-008-1337ND
2016-04-131610-009-1358ND
2016-04-131610-166-1300ND
2016-05-041610-078-0945ND
2016-05-111610-166-1150ND
2016-05-181610-027-0715ND
2016-06-011610-078-0935ND
2016-06-081610-166-1300ND
2016-07-061610-078-0950ND
2016-07-061610-151-1035ND
2016-07-131610-003-1237ND
2016-07-131610-008-0910ND
2016-07-131610-009-0815ND
2016-07-131610-166-1002ND
2016-08-031610-078-0925ND
2016-08-171610-166-0818ND
2016-09-081610-078-1015ND
2016-09-141610-032-0850ND
2016-09-141610-132-0950ND
2016-09-141610-134-1112ND
2016-09-141610-136-1029ND
2016-09-141610-166-0817ND
2016-09-211610-042-1024ND
2016-09-211610-115-1100ND
2016-10-051610-078-0950ND
2016-10-121610-003-0810ND
2016-10-121610-008-0950ND
2016-10-121610-009-0815ND
2016-10-121610-166-1200ND
2016-11-021610-078-1015ND
2016-11-091610-166-1405ND
2016-12-071610-078-0950ND
2016-12-141610-166-10330.860 ppb
2017-01-041610-078-0955ND
2017-01-041610-146-0958ND
2017-01-111610-008-1050ND
2017-01-111610-009-1010ND
2017-01-181610-166-11001.10 ppb
2017-02-011610-078-0955ND
2017-02-081610-166-11402.00 ppb
2017-03-011610-018-1215ND
2017-03-011610-078-1025ND
2017-03-031644-245-1300ND
2017-03-081610-166-11052.80 ppb
2017-04-051610-078-0930ND
2017-04-121610-008-0850ND
2017-04-121610-009-0800ND
2017-04-121610-166-10004.20 ppb
2017-05-031610-078-0855ND
2017-05-311610-166-1005ND
2017-06-071610-078-0910ND
2017-06-071610-146-0735ND
2017-06-141610-166-1035ND
2017-07-051610-078-0915ND
2017-07-111610-008-0950ND
2017-07-111610-009-0920ND
2017-07-111610-166-1200ND
2017-08-021610-044-0840ND
2017-08-021610-078-0910ND
2017-08-251610-003-1045ND
2017-08-251610-166-1120ND
2017-09-065867-035-0835ND
2017-09-065867-044-0925ND
2017-09-061610-061-1150ND
2017-09-061610-078-0930ND
2017-09-065867-124-0810ND
2017-09-065867-147-1105ND
2017-09-065867-149-0830ND
2017-09-131610-012-0740ND
2017-09-131610-031-0835ND
2017-09-131610-070-0850ND
2017-09-131610-130-1230ND
2017-09-131610-133-1335ND
2017-09-131610-135-1310ND
2017-09-131610-137-1113ND
2017-09-131610-166-0840ND
2017-09-131610-172-1015ND
2017-09-131610-187-0900ND
2017-09-131610-189-0940ND
2017-09-131610-196-0815ND
2017-09-205867-043-1030ND
2017-09-205867-047-0930ND
2017-09-205867-048-0900ND
2017-09-205867-062-0845ND
2017-09-205867-068-0820ND
2017-09-205867-097-1100ND
2017-09-205867-127-1045ND
2017-09-205867-170-0928ND
2017-09-205867-191-0958ND
2017-10-041610-078-09000.650 ppb
2017-10-111610-003-1030ND
2017-10-111610-008-0850ND
2017-10-111610-009-0835ND
2017-10-111610-051-1010ND
2017-10-111610-166-0925ND
2017-11-011610-078-09400.870 ppb
2017-11-081610-166-0925ND
2017-12-061610-078-09401.20 ppb
2017-12-131610-166-1055ND
2018-01-041610-148-0905ND
2018-01-091610-003-1350ND
2018-01-091610-008-0950ND
2018-01-091610-009-0920ND
2018-01-091610-165-1150ND
2018-01-241610-078-0740ND
2018-02-071610-078-09450.940 ppb
2018-02-071610-243-0930ND
2018-02-141610-166-1020ND
2018-03-071610-045-0930ND
2018-03-071610-050-0920ND
2018-03-071610-053-1000ND
2018-03-071610-078-10551.000 ppb
2018-03-071610-241-1045ND
2018-03-141610-041-0950ND
2018-03-141610-129-1030ND
2018-03-141610-166-0810ND
2018-03-141610-221-0804ND
2018-03-211610-018-0845ND
2018-03-211610-131-1148ND
2018-03-211610-226-1045ND
2018-04-041610-078-12051.20 ppb
2018-04-111610-003-1340ND
2018-04-111610-008-1100ND
2018-04-111610-009-1005ND
2018-04-111610-166-1230ND
2018-05-021610-078-09450.950 ppb
2018-06-061610-078-10200.730 ppb
2018-07-051610-078-12341.10 ppb
2018-07-111610-003-1340ND
2018-07-111610-008-1000ND
2018-07-181610-049-1005ND
2018-08-011610-078-11191.20 ppb
2018-09-041610-078-10252.00 ppb
2018-10-031610-078-10352.00 ppb
2018-10-101610-003-1120ND
2018-10-101610-008-0900ND
2018-10-101610-009-0840ND
2018-11-071610-078-10401.70 ppb
2018-12-051610-078-10001.30 ppb
2019-01-021610-078-12001.70 ppb
2019-01-081610-003-1220ND
2019-01-081610-008-1100ND
2019-01-081610-009-0950ND
2019-02-061610-078-10101.90 ppb
2019-03-061610-078-10151.60 ppb
2019-04-031610-078-10102.10 ppb
2019-04-101610-003-0820ND
2019-04-101610-008-1200ND
2019-04-101610-009-0840ND
2019-05-011610-078-10101.80 ppb
2019-06-051610-078-09302.40 ppb
2019-07-031610-078-12252.70 ppb
2019-07-031610-151-0835ND
2019-07-101610-003-1150ND
2019-07-101610-008-0930ND
2019-07-101610-009-0900ND
2019-07-171610-078-07302.50 ppb
2019-08-061610-166-1033ND
2019-08-141610-166-0854ND
2019-08-281610-078-0830ND
2019-09-041610-078-0910ND
2019-09-101610-032-1025ND
2019-09-101610-132-1045ND
2019-09-111610-134-1212ND
2019-09-111610-136-1310ND
2019-09-111610-166-1120ND
2019-09-181610-042-1125ND
2019-10-021610-078-0955ND
2019-10-091610-003-1050ND
2019-10-091610-008-1032ND
2019-10-091610-009-1105ND
2019-10-091610-166-0952ND
2019-11-061610-078-1200ND
2019-11-121610-166-0918ND
2019-12-041610-078-1015ND
2019-12-111610-166-1029ND
2019-12-171610-245-0900ND