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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

City of Levelland

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

 

112

Samples

0

Samples exceeding legal limit (MCL)

65

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.67 ppb188ND - 14.4 ppb
20151.73 ppb189ND - 3.98 ppb
20161.89 ppb1918ND - 3.43 ppb
20170.821 ppb209ND - 2.51 ppb
20181.62 ppb1813ND - 3.12 ppb
20190.468 ppb198ND - 1.18 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
2014-02-19Q14055000061.36 ppb
2014-02-19Q14055000071.56 ppb
2014-02-19Q14055000080.940 ppb
2014-02-19Q14055000091.13 ppb
2014-04-22Q1412665001ND
2014-04-22Q1412665002ND
2014-04-22Q1412665003ND
2014-04-22Q1412665004ND
2014-07-02Q1425552002ND
2014-07-02Q1425552003ND
2014-07-02Q1425552004ND
2014-07-02Q1425552005ND
2014-07-02Q1425552009ND
2014-07-02Q142555201014.4 ppb
2014-12-17Q14603970014.40 ppb
2014-12-17Q14603970023.40 ppb
2014-12-17Q1460397003ND
2014-12-17Q14603970042.80 ppb
2015-02-05Q1504679001ND
2015-02-05Q1504679002ND
2015-02-05Q1504679003ND
2015-02-05Q1504679004ND
2015-04-09Q1513274003ND
2015-04-09Q1513274004ND
2015-04-09Q1513274005ND
2015-04-09Q1513274006ND
2015-04-09Q1513274007ND
2015-07-16Q15274920023.18 ppb
2015-07-16Q15274920033.82 ppb
2015-07-16Q15274920043.79 ppb
2015-07-16Q15274920053.73 ppb
2015-07-16Q15274920063.98 ppb
2015-10-15Q15407040013.40 ppb
2015-10-15Q15407040022.92 ppb
2015-10-15Q15407040033.16 ppb
2015-10-15Q15407040043.23 ppb
2016-01-12Q16008790072.56 ppb
2016-01-12Q16008790102.61 ppb
2016-01-12Q16008790013.05 ppb
2016-01-12Q16008790023.19 ppb
2016-01-12Q16008790033.43 ppb
2016-01-12Q16008790043.17 ppb
2016-04-14Q16149510011.59 ppb
2016-04-14Q16149510021.10 ppb
2016-04-14Q16149510031.21 ppb
2016-04-14Q16149510041.06 ppb
2016-09-21Q16390830011.75 ppb
2016-09-21Q16390830021.79 ppb
2016-09-21Q16390830031.66 ppb
2016-09-21Q16390830041.70 ppb
2016-10-19Q16446030021.61 ppb
2016-10-19Q16446030031.53 ppb
2016-10-19Q16446030041.41 ppb
2016-10-19Q16446030011.53 ppb
2016-12-15Q1654679005ND
2017-01-10Q1701080007ND
2017-01-10Q1701080003ND
2017-01-10Q1701080004ND
2017-01-19Q1702543001ND
2017-01-19Q1702543002ND
2017-04-26Q1716967002ND
2017-04-26Q1716967005ND
2017-04-26Q1716967006ND
2017-04-26Q1716967007ND
2017-04-26Q1716967008ND
2017-06-15Q1725000002ND
2017-09-06Q17415850011.41 ppb
2017-09-06Q17415850021.43 ppb
2017-09-06Q17415850031.30 ppb
2017-09-06Q17415850041.33 ppb
2017-09-06Q17415850062.51 ppb
2017-10-17Q17532280022.10 ppb
2017-10-17Q17532280012.26 ppb
2017-10-17Q17532280031.95 ppb
2017-10-17Q17532280042.12 ppb
2018-01-11Q18015530012.07 ppb
2018-01-11Q18015530021.83 ppb
2018-01-11Q18015530031.93 ppb
2018-01-11Q18015530042.20 ppb
2018-04-04Q18138600012.62 ppb
2018-04-04Q18138600072.57 ppb
2018-04-04Q18138600043.02 ppb
2018-04-04Q18138600102.92 ppb
2018-04-04Q18138600052.85 ppb
2018-04-04Q18138600063.12 ppb
2018-07-02Q18261970011.35 ppb
2018-07-02Q18261970021.56 ppb
2018-07-02Q1826197003ND
2018-07-02Q18261970041.20 ppb
2018-10-02Q1839236001ND
2018-10-02Q1839236003ND
2018-10-02Q1839236002ND
2018-10-02Q1839236004ND
2019-01-08Q1900775017ND
2019-01-08Q1900775001ND
2019-01-08Q1900775015ND
2019-01-08Q1900775007ND
2019-01-08Q1900775016ND
2019-01-08Q1900775008ND
2019-04-02Q1913266001ND
2019-04-02Q19132660031.13 ppb
2019-04-02Q1913266002ND
2019-04-02Q1913266004ND
2019-07-01Q19412580011.11 ppb
2019-07-01Q19412580021.10 ppb
2019-07-01Q19412580031.12 ppb
2019-07-01Q19412580041.18 ppb
2019-10-16Q19728530011.01 ppb
2019-10-16Q19728530021.14 ppb
2019-10-16Q1972853003ND
2019-10-16Q19728530041.11 ppb
2019-12-03Q1978629004ND