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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Cromwell Fire District Water Department

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

 

138

Samples

0

Samples exceeding legal limit (MCL)

95

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.22 ppb2015ND - 3.90 ppb
20151.20 ppb2316ND - 3.50 ppb
20161.19 ppb2416ND - 3.90 ppb
20171.61 ppb2416ND - 5.60 ppb
20181.76 ppb2416ND - 5.10 ppb
20191.59 ppb2316ND - 4.20 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
2014-01-14BF98732TTHM1.80 ppb
2014-01-14BF98733TTHM1.20 ppb
2014-01-14BF98734TTHM0.820 ppb
2014-01-14BF98735TTHM0.590 ppb
2014-02-25BG12770TTHM1.70 ppb
2014-03-04BG15010VOC1ND
2014-04-22BG35619TTHM2.00 ppb
2014-04-22BG35620TTHM1.20 ppb
2014-04-22BG35621TTHM0.820 ppb
2014-04-22BG35622TTHM1.20 ppb
2014-05-20BG46520VOC1ND
2014-05-27BG48886TTHM2.90 ppb
2014-07-22BG79664TTHM2.40 ppb
2014-07-22BG79665TTHM1.50 ppb
2014-07-22BG79666TTHM1.10 ppb
2014-07-22BG79667TTHM1.30 ppb
2014-09-02BH02695VOC1ND
2014-11-24BH45136TTHM3.90 ppb
2014-12-02BH47701VOC1ND
2014-12-02BH47706VOC1ND
2015-01-13BH62501TTHM2.00 ppb
2015-01-13BH62503TTHM0.840 ppb
2015-01-13BH62500TTHM3.50 ppb
2015-01-13BH62502TTHM1.80 ppb
2015-02-10BH71858VOC1ND
2015-02-10BH71857VOC1ND
2015-04-14BJ02142TTHM0.900 ppb
2015-04-14BJ02141TTHM1.10 ppb
2015-04-14BJ02139TTHM2.00 ppb
2015-04-14BJ02140TTHM1.60 ppb
2015-05-19BJ18383VOC1ND
2015-05-19BJ18385VOC1ND
2015-07-14BJ46027TTHM0.680 ppb
2015-07-14BJ46025TTHM1.60 ppb
2015-07-14BJ46024TTHM2.40 ppb
2015-07-14BJ46026TTHM1.10 ppb
2015-08-11BJ72577VOC1ND
2015-08-11BJ72576VOC1ND
2015-10-15BK08380TTHM2.20 ppb
2015-10-15BK08379TTHM3.30 ppb
2015-10-15BK08381TTHM1.70 ppb
2015-10-15BK08382TTHM0.880 ppb
2015-11-10BK20667VOC1ND
2016-01-26BK57526TTHM2.50 ppb
2016-01-26BK57527TTHM1.60 ppb
2016-01-26BK57528TTHM1.40 ppb
2016-01-26BK57529TTHM0.700 ppb
2016-02-23BK68408VOC1ND
2016-02-23BK68409VOC1ND
2016-04-26BN19503TTHM1.90 ppb
2016-04-26BN19504TTHM1.60 ppb
2016-04-26BN19505TTHM1.40 ppb
2016-04-26BN19506TTHM0.700 ppb
2016-05-24BN39850VOC1ND
2016-05-24BN39851VOC1ND
2016-07-12BN71527TTHM3.00 ppb
2016-07-12BN71528TTHM1.70 ppb
2016-07-12BN71529TTHM1.80 ppb
2016-07-12BN71530TTHM0.580 ppb
2016-08-09BN89016VOC1ND
2016-08-09BN89017VOC1ND
2016-10-11BV45154TTHM1.10 ppb
2016-10-11BV45155TTHM3.90 ppb
2016-10-11BV45156TTHM2.40 ppb
2016-10-11BV45157TTHM2.20 ppb
2016-10-25BV64546VOC1ND
2016-10-25BV64547VOC1ND
2017-01-24BX37054TTHM3.70 ppb
2017-01-24BX37055TTHM2.40 ppb
2017-01-24BX37056TTHM1.80 ppb
2017-01-24BX37057TTHM1.10 ppb
2017-02-14BX60423VOC1ND
2017-02-14BX60424VOC1ND
2017-04-25BY09439TTHM3.50 ppb
2017-04-25BY09440TTHM2.10 ppb
2017-04-25BY09441TTHM1.80 ppb
2017-04-25BY09442TTHM1.40 ppb
2017-05-23BY27845VOC1ND
2017-05-23BY27846VOC1ND
2017-07-25BY71908TTHM3.10 ppb
2017-07-25BY71909TTHM1.70 ppb
2017-07-25BY71910TTHM1.90 ppb
2017-07-25BY71911TTHM1.20 ppb
2017-08-22BY88323VOC1ND
2017-08-22BY88324VOC1ND
2017-10-24BZ25923TTHM5.60 ppb
2017-10-24BZ25924TTHM2.90 ppb
2017-10-24BZ25925TTHM2.70 ppb
2017-10-24BZ25926TTHM1.70 ppb
2017-11-28BZ47192VOC1ND
2017-11-28BZ47193VOC1ND
2018-01-23BZ78967TTHM3.60 ppb
2018-01-23BZ78968TTHM2.60 ppb
2018-01-23BZ78969TTHM1.90 ppb
2018-01-23BZ78970TTHM1.000 ppb
2018-02-13BZ88138VOC1ND
2018-02-13BZ88139VOC1ND
2018-04-24CA34727TTHM4.10 ppb
2018-04-24CA34728TTHM2.50 ppb
2018-04-24CA34729TTHM2.10 ppb
2018-04-24CA34730TTHM0.930 ppb
2018-05-08CA42571VOC1ND
2018-05-08CA42572VOC1ND
2018-07-24CA964474.40 ppb
2018-07-24CA964483.10 ppb
2018-07-24CA964492.60 ppb
2018-07-24CA964501.40 ppb
2018-08-21CB15781ND
2018-08-21CB15782ND
2018-10-23CB799045.10 ppb
2018-10-23CB799053.00 ppb
2018-10-23CB799062.60 ppb
2018-10-23CB799071.30 ppb
2018-11-27CC03233ND
2018-11-27CC03234ND
2019-01-22CC325934.10 ppb
2019-01-22CC325942.30 ppb
2019-01-22CC325951.30 ppb
2019-01-22CC325961.000 ppb
2019-02-12CC50961ND
2019-02-12CC50962ND
2019-04-23CC997003.20 ppb
2019-04-23CC997011.80 ppb
2019-04-23CC997022.20 ppb
2019-04-23CC997031.70 ppb
2019-05-28CD21926ND
2019-05-28CD21927ND
2019-07-23CD629664.10 ppb
2019-07-23CD629672.40 ppb
2019-07-23CD629682.60 ppb
2019-07-23CD629690.860 ppb
2019-08-13CD83648ND
2019-08-13CD83649ND
2019-10-22CE452864.20 ppb
2019-10-22CE452872.00 ppb
2019-10-22CE452881.60 ppb
2019-10-22CE452891.20 ppb
2019-11-26CE68107ND