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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

City of Lodi

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

395

Samples

0

Samples exceeding legal limit (MCL)

142

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.77 ppb7823ND - 25.0 ppb
20155.34 ppb8426ND - 41.0 ppb
20163.62 ppb7923ND - 34.0 ppb
20177.87 ppb6526ND - 37.0 ppb
201810.7 ppb4926ND - 43.0 ppb
20199.04 ppb4021ND - 35.0 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 chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-065802-028-0950ND
2014-01-145802-900-09102.10 ppb
2014-01-145802-901-0930ND
2014-01-145802-902-0950ND
2014-01-145802-903-1040ND
2014-01-145802-904-11005.70 ppb
2014-01-145802-905-1010ND
2014-01-145802-906-082019.0 ppb
2014-01-145802-907-08500.950 ppb
2014-01-165802-016-1030ND
2014-01-165802-017-1000ND
2014-01-225802-049-120014.0 ppb
2014-02-045802-016-0930ND
2014-02-055802-003-0750ND
2014-03-175802-016-1020ND
2014-03-205802-003-0830ND
2014-04-025802-003-1220ND
2014-04-025802-900-101011.0 ppb
2014-04-025802-901-09550.400 ppb
2014-04-025802-902-0940ND
2014-04-025802-903-09000.370 ppb
2014-04-025802-904-08400.480 ppb
2014-04-025802-905-0915ND
2014-04-025802-906-080025.0 ppb
2014-04-025802-907-082022.0 ppb
2014-04-085802-018-0915ND
2014-04-085802-038-1200ND
2014-04-095802-028-0745ND
2014-04-145802-016-1000ND
2014-04-155802-023-0630ND
2014-05-225802-003-0740ND
2014-05-225802-016-0810ND
2014-06-045802-003-0915ND
2014-06-045802-016-0930ND
2014-07-015802-900-07100.430 ppb
2014-07-015802-901-0735ND
2014-07-015802-902-0810ND
2014-07-015802-903-09150.230 ppb
2014-07-015802-904-0850ND
2014-07-015802-905-0835ND
2014-07-015802-906-0955ND
2014-07-015802-907-09354.00 ppb
2014-07-085802-019-0720ND
2014-07-095802-038-1145ND
2014-07-105802-003-0815ND
2014-07-105802-016-0850ND
2014-07-105802-017-0905ND
2014-07-105802-028-0830ND
2014-07-175802-042-08350.720 ppb
2014-08-055802-025-0650ND
2014-08-075802-012-0740ND
2014-08-075802-048-06553.20 ppb
2014-08-135802-040-1135ND
2014-08-145802-009-0740ND
2014-08-195802-003-0930ND
2014-08-205802-016-1000ND
2014-09-155802-016-1330ND
2014-09-165802-003-0800ND
2014-10-035867-048-1015ND
2014-10-065802-028-1040ND
2014-10-065867-048-1220ND
2014-10-085802-003-1040ND
2014-10-085802-016-1220ND
2014-10-095802-900-08300.980 ppb
2014-10-095802-901-09001.80 ppb
2014-10-095802-902-10107.70 ppb
2014-10-095802-903-10201.40 ppb
2014-10-095802-904-10452.20 ppb
2014-10-095802-905-09501.20 ppb
2014-10-095802-906-0800ND
2014-10-095802-907-103013.0 ppb
2014-10-165802-038-0800ND
2014-11-065802-003-1010ND
2014-11-125802-016-0710ND
2014-11-125802-048-0730ND
2014-12-035802-016-0920ND
2014-12-085802-003-1020ND
2014-12-095802-048-0930ND
2015-01-085802-028-0855ND
2015-01-085802-900-09107.40 ppb
2015-01-085802-901-08300.860 ppb
2015-01-085802-902-08153.90 ppb
2015-01-085802-903-09300.780 ppb
2015-01-085802-904-07456.40 ppb
2015-01-085802-905-08000.500 ppb
2015-01-085802-906-070017.0 ppb
2015-01-085802-907-07304.20 ppb
2015-01-145802-003-0800ND
2015-01-145802-017-0850ND
2015-01-155802-016-0830ND
2015-01-155802-019-0715ND
2015-01-155802-048-0845ND
2015-02-105802-048-0810ND
2015-03-125802-003-0815ND
2015-03-125802-016-0745ND
2015-03-255802-048-1115ND
2015-04-065802-900-124540.0 ppb
2015-04-065802-901-1125ND
2015-04-065802-902-110514.0 ppb
2015-04-065802-903-104530.0 ppb
2015-04-065802-904-132519.0 ppb
2015-04-065802-905-11450.780 ppb
2015-04-065802-906-130527.0 ppb
2015-04-075802-907-135027.0 ppb
2015-04-145802-016-0950ND
2015-04-145802-048-1030ND
2015-04-215802-018-1000ND
2015-04-225802-003-1030ND
2015-04-225802-028-1100ND
2015-04-225802-038-1340ND
2015-05-055802-048-0820ND
2015-05-065802-016-0730ND
2015-06-045802-016-0840ND
2015-06-105802-048-0930ND
2015-06-165802-003-0920ND
2015-07-025802-003-0830ND
2015-07-085802-900-134020.0 ppb
2015-07-085802-901-1315ND
2015-07-085802-902-1240ND
2015-07-085802-903-125511.0 ppb
2015-07-085802-904-11459.00 ppb
2015-07-085802-905-1215ND
2015-07-085802-906-11106.00 ppb
2015-07-095802-907-113034.0 ppb
2015-07-145802-019-0900ND
2015-07-155802-017-0945ND
2015-07-155802-042-0900ND
2015-07-165802-038-0830ND
2015-07-205802-028-0800ND
2015-07-215802-048-0800ND
2015-07-235802-016-0800ND
2015-08-035802-028-1200ND
2015-08-045802-006-0800ND
2015-08-045802-018-0730ND
2015-08-065802-029-0930ND
2015-08-115802-002-0800ND
2015-08-115802-048-0950ND
2015-08-125802-019-1015ND
2015-08-255802-003-0830ND
2015-08-255802-016-0810ND
2015-09-035802-048-0830ND
2015-09-105802-003-0750ND
2015-09-105802-016-0650ND
2015-10-015802-038-0825ND
2015-10-015802-042-0930ND
2015-10-055802-900-094516.0 ppb
2015-10-055802-901-1015ND
2015-10-055802-902-10550.910 ppb
2015-10-055802-903-120041.0 ppb
2015-10-055802-904-125040.0 ppb
2015-10-055802-905-1035ND
2015-10-055802-906-081541.0 ppb
2015-10-055802-907-140031.0 ppb
2015-10-065802-028-0735ND
2015-10-085802-048-0810ND
2015-10-135802-003-0940ND
2015-10-135802-016-0915ND
2015-11-115802-003-0740ND
2015-11-115802-016-0920ND
2015-11-115802-048-0850ND
2015-12-025802-048-1020ND
2015-12-085802-003-0915ND
2016-01-045802-038-1225ND
2016-01-055802-019-0945ND
2016-01-065802-016-0835ND
2016-01-065802-042-0800ND
2016-01-065802-900-12200.610 ppb
2016-01-065802-901-1240ND
2016-01-065802-902-1255ND
2016-01-065802-903-1325ND
2016-01-065802-904-1346ND
2016-01-065802-905-1310ND
2016-01-065802-906-1415ND
2016-01-065802-907-14000.530 ppb
2016-01-115802-048-1230ND
2016-01-125802-003-0830ND
2016-01-125802-017-0800ND
2016-01-125802-028-0930ND
2016-02-035802-003-1000ND
2016-02-045802-016-0910ND
2016-03-075802-016-0910ND
2016-04-045802-042-09301.10 ppb
2016-04-055802-038-0820ND
2016-04-135802-003-1010ND
2016-04-135802-900-07158.80 ppb
2016-04-135802-901-07400.540 ppb
2016-04-135802-902-08001.30 ppb
2016-04-135802-903-115514.0 ppb
2016-04-135802-904-134020.0 ppb
2016-04-135802-905-131511.0 ppb
2016-04-135802-906-144516.0 ppb
2016-04-135802-907-141533.0 ppb
2016-04-145802-016-0820ND
2016-04-145802-018-0750ND
2016-04-205802-028-0810ND
2016-04-215802-042-0650ND
2016-04-225802-042-0800ND
2016-05-045802-042-0825ND
2016-05-055802-016-0840ND
2016-06-085802-016-0855ND
2016-07-055802-038-0700ND
2016-07-065802-003-1045ND
2016-07-065802-016-1245ND
2016-07-075802-035-0910ND
2016-07-135802-900-101012.0 ppb
2016-07-135802-901-10405.20 ppb
2016-07-135802-902-1100ND
2016-07-135802-903-115514.0 ppb
2016-07-135802-904-123012.0 ppb
2016-07-135802-905-1125ND
2016-07-135802-906-1330ND
2016-07-135802-907-130021.0 ppb
2016-07-145802-042-0945ND
2016-07-195802-019-0900ND
2016-07-195802-028-0840ND
2016-07-265802-017-0850ND
2016-08-025802-033-0830ND
2016-08-105802-016-1300ND
2016-08-105802-017-1230ND
2016-08-105802-031-1330ND
2016-08-165802-021-0850ND
2016-08-165802-023-0930ND
2016-08-185802-046-0820ND
2016-09-135802-016-0820ND
2016-10-045802-900-080016.0 ppb
2016-10-045802-901-08309.00 ppb
2016-10-045802-902-09305.30 ppb
2016-10-045802-903-091034.0 ppb
2016-10-045802-904-095029.0 ppb
2016-10-045802-905-0850ND
2016-10-045802-906-10301.80 ppb
2016-10-045802-907-101020.0 ppb
2016-10-065802-038-0940ND
2016-10-105802-042-1420ND
2016-10-185802-003-0730ND
2016-10-185802-003-0800ND
2016-10-185802-028-0800ND
2016-10-205802-016-0800ND
2016-11-015802-016-0930ND
2016-11-105802-041-0710ND
2016-12-155802-016-0930ND
2017-01-045802-900-090034.0 ppb
2017-01-045802-901-09301.30 ppb
2017-01-045802-902-1015ND
2017-01-045802-903-110035.0 ppb
2017-01-045802-904-1130ND
2017-01-045802-905-095537.0 ppb
2017-01-045802-906-141533.0 ppb
2017-01-045802-907-135033.0 ppb
2017-01-055802-038-0910ND
2017-01-055802-042-0715ND
2017-01-125802-003-1115ND
2017-01-125802-017-1320ND
2017-01-125802-048-0955ND
2017-01-175802-016-0915ND
2017-02-095802-016-0855ND
2017-04-055802-900-085025.0 ppb
2017-04-055802-901-0910ND
2017-04-055802-902-13004.60 ppb
2017-04-055802-903-121029.0 ppb
2017-04-055802-904-135010.00 ppb
2017-04-055802-905-13300.810 ppb
2017-04-055802-906-0940ND
2017-04-055802-907-10108.80 ppb
2017-04-115802-016-0810ND
2017-04-115802-028-0630ND
2017-04-185802-018-0800ND
2017-05-085802-016-1020ND
2017-07-055802-900-115019.0 ppb
2017-07-055802-901-1220ND
2017-07-055802-902-1245ND
2017-07-055802-903-133029.0 ppb
2017-07-055802-904-135024.0 ppb
2017-07-055802-905-1310ND
2017-07-055802-906-143017.0 ppb
2017-07-055802-907-140528.0 ppb
2017-07-065802-042-0700ND
2017-07-115802-028-0930ND
2017-07-115802-038-0730ND
2017-07-125802-003-0950ND
2017-07-125802-017-0800ND
2017-07-135802-019-0755ND
2017-07-275802-016-0700ND
2017-08-015802-009-0720ND
2017-08-095802-048-1350ND
2017-08-105802-025-07150.910 ppb
2017-08-105802-040-0640ND
2017-08-145802-003-1315ND
2017-08-145802-012-14150.860 ppb
2017-08-145802-016-1340ND
2017-09-125802-016-0820ND
2017-10-025802-900-125027.0 ppb
2017-10-025802-901-1320ND
2017-10-025802-902-134011.0 ppb
2017-10-025802-903-150526.0 ppb
2017-10-025802-904-143025.0 ppb
2017-10-025802-905-14051.30 ppb
2017-10-035802-042-0740ND
2017-10-035802-906-091028.0 ppb
2017-10-035802-907-085023.0 ppb
2017-10-055802-038-0715ND
2017-10-095802-003-0850ND
2017-10-095802-028-0830ND
2017-10-105802-016-0730ND
2017-11-135802-016-0800ND
2017-12-125802-016-0810ND
2018-01-045802-900-080026.0 ppb
2018-01-045802-901-08259.70 ppb
2018-01-045802-902-085018.0 ppb
2018-01-045802-903-092021.0 ppb
2018-01-045802-904-100523.0 ppb
2018-01-045802-905-09452.00 ppb
2018-01-045802-906-104517.0 ppb
2018-01-045802-907-102519.0 ppb
2018-01-115802-038-0740ND
2018-01-165802-016-0845ND
2018-01-165802-048-1025ND
2018-02-125802-016-0750ND
2018-04-045802-900-120019.0 ppb
2018-04-045802-901-12301.50 ppb
2018-04-045802-902-1300ND
2018-04-045802-903-135028.0 ppb
2018-04-045802-904-141043.0 ppb
2018-04-045802-905-1330ND
2018-04-045802-906-150038.0 ppb
2018-04-045802-907-143539.0 ppb
2018-04-055802-038-0730ND
2018-04-105802-016-0735ND
2018-05-155802-016-0830ND
2018-07-045802-900-120532.0 ppb
2018-07-045802-901-12300.580 ppb
2018-07-045802-902-1255ND
2018-07-045802-903-102017.0 ppb
2018-07-045802-904-10505.60 ppb
2018-07-045802-905-1320ND
2018-07-045802-906-114014.0 ppb
2018-07-045802-907-112027.0 ppb
2018-07-115802-016-0915ND
2018-08-075802-018-1030ND
2018-08-075802-019-0840ND
2018-08-095802-002-0800ND
2018-08-095802-006-0735ND
2018-08-145802-029-0750ND
2018-09-255802-028-0700ND
2018-10-025802-038-0740ND
2018-10-025802-042-0700ND
2018-10-035802-900-123018.0 ppb
2018-10-035802-901-1250ND
2018-10-035802-902-13500.520 ppb
2018-10-035802-903-141524.0 ppb
2018-10-035802-904-144021.0 ppb
2018-10-035802-905-1320ND
2018-10-035802-906-152031.0 ppb
2018-10-035802-907-150029.0 ppb
2018-10-095802-016-0850ND
2019-01-025802-900-120025.0 ppb
2019-01-025802-901-12300.760 ppb
2019-01-025802-903-140030.0 ppb
2019-01-025802-904-143035.0 ppb
2019-01-025802-905-1300ND
2019-01-025802-906-153031.0 ppb
2019-01-025802-907-150027.0 ppb
2019-01-035802-042-0800ND
2019-01-035802-902-13300.500 ppb
2019-01-085802-016-0945ND
2019-01-085802-038-0730ND
2019-04-025802-016-0830ND
2019-04-025802-038-0800ND
2019-04-025802-042-0900ND
2019-04-035802-900-112026.0 ppb
2019-04-035802-901-12407.30 ppb
2019-04-035802-902-13205.90 ppb
2019-04-035802-903-13404.90 ppb
2019-04-035802-904-140028.0 ppb
2019-04-035802-905-13002.70 ppb
2019-04-045802-906-144022.0 ppb
2019-04-045802-907-142027.0 ppb
2019-07-015802-016-0920ND
2019-07-025802-038-0810ND
2019-07-025802-042-0700ND
2019-08-155802-023-0920ND
2019-08-205802-021-1010ND
2019-08-205802-033-0805ND
2019-08-215802-041-1325ND
2019-10-025802-038-1505ND
2019-10-025802-042-1400ND
2019-10-035802-016-0900ND
2019-10-095802-900-13309.80 ppb
2019-10-095802-901-14000.550 ppb
2019-10-095802-902-1430ND
2019-10-095802-903-145025.0 ppb
2019-10-095802-904-104521.0 ppb
2019-10-095802-905-1140ND
2019-10-095802-906-130515.0 ppb
2019-10-095802-907-111017.0 ppb