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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Plainview Municipal 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.

MORE ABOUT THIS CONTAMINANT

 

145

Samples

0

Samples exceeding legal limit (MCL)

85

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.48 ppb255ND - 26.4 ppb
20155.68 ppb2520ND - 14.7 ppb
20161.04 ppb2411ND - 5.66 ppb
20172.92 ppb2514ND - 8.01 ppb
20183.19 ppb2217ND - 6.59 ppb
20194.30 ppb2418ND - 8.74 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
2014-01-14Q1400667010ND
2014-01-14Q1400667007ND
2014-01-14Q1400667009ND
2014-01-14Q1400667013ND
2014-01-15Q1400995003ND
2014-01-15Q1400995005ND
2014-01-15Q1400995008ND
2014-01-15Q1400995010ND
2014-02-26Q140653800126.4 ppb
2014-02-26Q1406538002ND
2014-02-26Q1406538003ND
2014-02-26Q1406538004ND
2014-04-10Q1411487001ND
2014-04-10Q1411487002ND
2014-04-10Q1411487003ND
2014-04-10Q1411487004ND
2014-06-26Q1424207003ND
2014-08-14Q14368330061.50 ppb
2014-08-14Q14368330073.90 ppb
2014-08-14Q14368330082.40 ppb
2014-08-14Q14368330092.80 ppb
2014-11-12Q1455722001ND
2014-11-12Q1455722002ND
2014-11-12Q1455722003ND
2014-11-12Q1455722004ND
2015-01-21Q1501905002ND
2015-01-21Q15019050111.80 ppb
2015-01-21Q15019050121.70 ppb
2015-01-21Q15019050132.00 ppb
2015-01-21Q15019050141.60 ppb
2015-04-09Q1513222001ND
2015-04-09Q1513222002ND
2015-04-09Q1513222003ND
2015-04-09Q1513222004ND
2015-06-30Q15246660018.46 ppb
2015-09-14Q153541800113.4 ppb
2015-09-14Q15354180028.47 ppb
2015-09-14Q153541800314.7 ppb
2015-09-14Q15354180049.07 ppb
2015-10-26Q15420220066.68 ppb
2015-10-26Q15420220075.53 ppb
2015-10-26Q15420220107.35 ppb
2015-10-26Q15420220127.61 ppb
2015-10-26Q15420220139.39 ppb
2015-10-26Q15420220166.80 ppb
2015-10-26Q15420220176.75 ppb
2015-10-26Q15420220017.75 ppb
2015-10-26Q15420220026.95 ppb
2015-10-26Q15420220037.77 ppb
2015-10-26Q15420220048.25 ppb
2016-01-19Q1602114005ND
2016-01-19Q1602114008ND
2016-01-19Q1602114015ND
2016-01-19Q1602114016ND
2016-01-19Q16021140171.15 ppb
2016-01-19Q1602114018ND
2016-06-15Q1624367002ND
2016-06-15Q1624367008ND
2016-06-15Q1624367009ND
2016-06-15Q1624367010ND
2016-06-15Q1624367011ND
2016-09-07Q16361650015.66 ppb
2016-09-07Q16361650023.72 ppb
2016-09-07Q16361650034.03 ppb
2016-09-07Q16361650042.66 ppb
2016-12-01Q16522590121.07 ppb
2016-12-01Q1652259014ND
2016-12-01Q16522590151.24 ppb
2016-12-01Q16522590091.60 ppb
2016-12-01Q1652259017ND
2016-12-01Q16522590231.36 ppb
2016-12-01Q16522590071.04 ppb
2016-12-01Q16522590241.33 ppb
2016-12-01Q1652259010ND
2017-02-07Q1705153015ND
2017-02-07Q1705153001ND
2017-02-07Q1705153003ND
2017-02-07Q1705153011ND
2017-02-07Q1705153012ND
2017-02-07Q1705153013ND
2017-02-07Q1705153014ND
2017-05-02Q1718096001ND
2017-05-02Q1718096002ND
2017-05-02Q1718096003ND
2017-05-02Q1718096004ND
2017-08-30Q17403370244.43 ppb
2017-08-30Q17403370183.92 ppb
2017-08-30Q17403370275.31 ppb
2017-08-30Q17403370196.42 ppb
2017-08-30Q17403370286.22 ppb
2017-08-30Q17403370024.05 ppb
2017-08-30Q17403370155.81 ppb
2017-08-30Q17403370533.95 ppb
2017-08-30Q17403370164.90 ppb
2017-08-30Q17403370542.99 ppb
2017-10-04Q17487600016.26 ppb
2017-10-04Q17487600028.01 ppb
2017-10-04Q17487600036.41 ppb
2017-10-04Q17487600044.32 ppb
2018-03-13Q18101670132.93 ppb
2018-03-13Q18101670092.88 ppb
2018-03-13Q18101670104.10 ppb
2018-03-13Q18101670114.41 ppb
2018-03-13Q18101670123.53 ppb
2018-05-02Q1817843018ND
2018-05-02Q1817843009ND
2018-05-02Q1817843007ND
2018-05-02Q18178430192.86 ppb
2018-05-02Q18178440013.27 ppb
2018-05-02Q1817843015ND
2018-05-02Q18178430053.36 ppb
2018-05-02Q1817843016ND
2018-05-02Q18178430062.88 ppb
2018-07-31Q18302590036.09 ppb
2018-07-31Q18302590015.78 ppb
2018-07-31Q18302590043.79 ppb
2018-07-31Q18302590025.58 ppb
2018-10-03Q18395940013.65 ppb
2018-10-03Q18395940024.73 ppb
2018-10-03Q18395940036.59 ppb
2018-10-03Q18395940043.78 ppb
2019-01-10Q1901546007ND
2019-01-10Q1901546013ND
2019-01-10Q1901546005ND
2019-01-10Q1901546014ND
2019-01-10Q1901546006ND
2019-04-11Q1914701002ND
2019-04-11Q19147010081.85 ppb
2019-04-11Q19147010091.73 ppb
2019-04-11Q19147010101.93 ppb
2019-04-11Q19147010115.49 ppb
2019-07-16Q19452090025.86 ppb
2019-07-16Q19452090044.83 ppb
2019-07-16Q19452090066.13 ppb
2019-07-16Q19452090087.74 ppb
2019-07-16Q19452090105.50 ppb
2019-07-16Q19452090127.53 ppb
2019-07-16Q19452090288.74 ppb
2019-07-16Q19452090297.01 ppb
2019-07-16Q19452090306.54 ppb
2019-07-16Q19452090314.85 ppb
2019-10-03Q19709650018.45 ppb
2019-10-03Q19709650026.00 ppb
2019-10-03Q19709650038.09 ppb
2019-10-03Q19709650044.98 ppb