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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

City of Lake Charles Water System

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.

 

218

Samples

0

Samples exceeding legal limit (MCL)

182

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.855 ppb5824ND - 3.00 ppb
20131.70 ppb3230ND - 4.60 ppb
20143.39 ppb32321.10 ppb - 17.0 ppb
20152.25 ppb32321.30 ppb - 3.90 ppb
20161.82 ppb32320.690 ppb - 2.90 ppb
20171.86 ppb32320.910 ppb - 2.90 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
2012-04-30AD65282ND
2012-04-30AD65283ND
2012-04-30AD65284ND
2012-04-30AD65285ND
2012-04-30AD65286ND
2012-04-30AD65282ND
2012-04-30AD65283ND
2012-04-30AD65284ND
2012-04-30AD65285ND
2012-04-30AD65286ND
2012-05-16L0015392-012.50 ppb
2012-05-16L0015392-032.70 ppb
2012-05-16L0015392-041.80 ppb
2012-05-16L005392-021.30 ppb
2012-05-16L0015392-012.50 ppb
2012-05-16L0015392-032.70 ppb
2012-05-16L0015392-041.80 ppb
2012-05-16L005392-021.30 ppb
2012-05-29AD65742ND
2012-05-29AD65743ND
2012-05-29AD65744ND
2012-05-29AD65745ND
2012-05-29AD65746ND
2012-05-29AD65742ND
2012-05-29AD65743ND
2012-05-29AD65744ND
2012-05-29AD65745ND
2012-05-29AD65746ND
2012-07-23AD67956ND
2012-07-23AD67957ND
2012-07-23AD67958ND
2012-07-23AD67959ND
2012-07-23AD67960ND
2012-07-23AD67956ND
2012-07-23AD67957ND
2012-07-23AD67958ND
2012-07-23AD67959ND
2012-07-23AD67960ND
2012-08-16L0019009-011.30 ppb
2012-08-16L0019009-021.80 ppb
2012-08-16L0019009-032.60 ppb
2012-08-16L0019009-042.70 ppb
2012-08-16L0019009-011.30 ppb
2012-08-16L0019009-021.80 ppb
2012-08-16L0019009-032.60 ppb
2012-08-16L0019009-042.70 ppb
2012-10-08AD71683ND
2012-10-08AD71685ND
2012-10-08AD71683ND
2012-10-08AD71685ND
2012-11-07L0022388-042.50 ppb
2012-11-07L0022388-042.50 ppb
2012-11-14L0022388-011.30 ppb
2012-11-14L0022388-021.30 ppb
2012-11-14L0022388-033.00 ppb
2012-11-14L0022388-011.30 ppb
2012-11-14L0022388-021.30 ppb
2012-11-14L0022388-033.00 ppb
2013-02-14L0025985-011.000 ppb
2013-02-14L0025985-021.20 ppb
2013-02-14L0025985-032.00 ppb
2013-02-14L0025985-041.80 ppb
2013-02-14L0025985-011.000 ppb
2013-02-14L0025985-021.20 ppb
2013-02-14L0025985-032.00 ppb
2013-02-14L0025985-041.80 ppb
2013-05-15L0029502-011.40 ppb
2013-05-15L0029502-022.80 ppb
2013-05-15L0029502-032.00 ppb
2013-05-15L0029502-044.60 ppb
2013-05-15L0029502-011.40 ppb
2013-05-15L0029502-022.80 ppb
2013-05-15L0029502-032.00 ppb
2013-05-15L0029502-044.60 ppb
2013-08-13L0033111-011.60 ppb
2013-08-13L0033111-022.20 ppb
2013-08-13L0033111-031.50 ppb
2013-08-13L0033111-041.50 ppb
2013-08-13L0033111-011.60 ppb
2013-08-13L0033111-022.20 ppb
2013-08-13L0033111-031.50 ppb
2013-08-13L0033111-041.50 ppb
2013-11-12L0036627-011.20 ppb
2013-11-12L0036627-02ND
2013-11-12L0036627-031.000 ppb
2013-11-12L0036627-041.40 ppb
2013-11-12L0036627-011.20 ppb
2013-11-12L0036627-02ND
2013-11-12L0036627-031.000 ppb
2013-11-12L0036627-041.40 ppb
2014-02-14L0039713-012.80 ppb
2014-02-14L0039713-021.60 ppb
2014-02-14L0039713-031.20 ppb
2014-02-14L0039713-042.30 ppb
2014-02-14L0039713-012.80 ppb
2014-02-14L0039713-021.60 ppb
2014-02-14L0039713-031.20 ppb
2014-02-14L0039713-042.30 ppb
2014-05-15L0043038-012.50 ppb
2014-05-15L0043038-021.10 ppb
2014-05-15L0043038-0317.0 ppb
2014-05-15L0043038-042.10 ppb
2014-05-15L0043038-012.50 ppb
2014-05-15L0043038-021.10 ppb
2014-05-15L0043038-0317.0 ppb
2014-05-15L0043038-042.10 ppb
2014-08-13L0046692-011.20 ppb
2014-08-13L0046692-021.10 ppb
2014-08-13L0046692-035.30 ppb
2014-08-13L0046692-043.60 ppb
2014-08-13L0046692-011.20 ppb
2014-08-13L0046692-021.10 ppb
2014-08-13L0046692-035.30 ppb
2014-08-13L0046692-043.60 ppb
2014-11-11L0050494-013.50 ppb
2014-11-11L0050494-021.90 ppb
2014-11-11L0050494-033.30 ppb
2014-11-11L0050494-043.80 ppb
2014-11-11L0050494-013.50 ppb
2014-11-11L0050494-021.90 ppb
2014-11-11L0050494-033.30 ppb
2014-11-11L0050494-043.80 ppb
2015-02-12LA3534-11.40 ppb
2015-02-12LA3534-21.50 ppb
2015-02-12LA3534-32.00 ppb
2015-02-12LA3534-42.70 ppb
2015-02-12LA3534-11.40 ppb
2015-02-12LA3534-21.50 ppb
2015-02-12LA3534-32.00 ppb
2015-02-12LA3534-42.70 ppb
2015-05-12LA6929-11.70 ppb
2015-05-12LA6929-21.90 ppb
2015-05-12LA6929-33.20 ppb
2015-05-12LA6929-43.10 ppb
2015-05-12LA6929-11.70 ppb
2015-05-12LA6929-21.90 ppb
2015-05-12LA6929-33.20 ppb
2015-05-12LA6929-43.10 ppb
2015-08-11LA10223-11.30 ppb
2015-08-11LA10223-21.60 ppb
2015-08-11LA10223-33.90 ppb
2015-08-11LA10223-43.20 ppb
2015-08-11LA10223-11.30 ppb
2015-08-11LA10223-21.60 ppb
2015-08-11LA10223-33.90 ppb
2015-08-11LA10223-43.20 ppb
2015-11-10LA13902-12.30 ppb
2015-11-10LA13902-21.40 ppb
2015-11-10LA13902-32.30 ppb
2015-11-10LA13902-42.50 ppb
2015-11-10LA13902-12.30 ppb
2015-11-10LA13902-21.40 ppb
2015-11-10LA13902-32.30 ppb
2015-11-10LA13902-42.50 ppb
2016-02-08LA17014-11.50 ppb
2016-02-08LA17014-21.60 ppb
2016-02-08LA17014-31.90 ppb
2016-02-08LA17014-42.50 ppb
2016-02-08LA17014-11.50 ppb
2016-02-08LA17014-21.60 ppb
2016-02-08LA17014-31.90 ppb
2016-02-08LA17014-42.50 ppb
2016-05-11LA20626-11.20 ppb
2016-05-11LA20626-20.690 ppb
2016-05-11LA20626-32.60 ppb
2016-05-11LA20626-42.50 ppb
2016-05-11LA20626-11.20 ppb
2016-05-11LA20626-20.690 ppb
2016-05-11LA20626-32.60 ppb
2016-05-11LA20626-42.50 ppb
2016-08-10LA24066-11.40 ppb
2016-08-10LA24066-22.90 ppb
2016-08-10LA24066-31.10 ppb
2016-08-10LA24066-42.80 ppb
2016-08-10LA24066-11.40 ppb
2016-08-10LA24066-22.90 ppb
2016-08-10LA24066-31.10 ppb
2016-08-10LA24066-42.80 ppb
2016-11-10LA27401-10.760 ppb
2016-11-10LA27401-20.950 ppb
2016-11-10LA27401-31.80 ppb
2016-11-10LA27401-42.90 ppb
2016-11-10LA27401-10.760 ppb
2016-11-10LA27401-20.950 ppb
2016-11-10LA27401-31.80 ppb
2016-11-10LA27401-42.90 ppb
2017-02-16352960760011.10 ppb
2017-02-16352960760021.60 ppb
2017-02-16352960760031.80 ppb
2017-02-16352960760042.90 ppb
2017-02-16352960760011.10 ppb
2017-02-16352960760021.60 ppb
2017-02-16352960760031.80 ppb
2017-02-16352960760042.90 ppb
2017-05-11353121270011.50 ppb
2017-05-11353121270022.00 ppb
2017-05-11353121270032.10 ppb
2017-05-11353121270042.80 ppb
2017-05-11353121270011.50 ppb
2017-05-11353121270022.00 ppb
2017-05-11353121270032.10 ppb
2017-05-11353121270042.80 ppb
2017-08-03353283600130.910 ppb
2017-08-03353283600141.30 ppb
2017-08-03353283600152.60 ppb
2017-08-03353283600162.60 ppb
2017-08-03353283600130.910 ppb
2017-08-03353283600141.30 ppb
2017-08-03353283600152.60 ppb
2017-08-03353283600162.60 ppb
2017-11-03353461760011.20 ppb
2017-11-03353461760021.30 ppb
2017-11-03353461760031.90 ppb
2017-11-03353461760042.20 ppb
2017-11-03353461760011.20 ppb
2017-11-03353461760021.30 ppb
2017-11-03353461760031.90 ppb
2017-11-03353461760042.20 ppb