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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

City of Newport Beach

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

 

239

Samples

0

Samples exceeding legal limit (MCL)

172

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201410.00 ppb3832ND - 22.0 ppb
20158.24 ppb3632ND - 18.0 ppb
20163.44 ppb3924ND - 12.0 ppb
20173.61 ppb4025ND - 24.0 ppb
20182.42 ppb4232ND - 4.50 ppb
20192.10 ppb4427ND - 5.50 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
2014-01-082706-801-15208.90 ppb
2014-01-082706-802-14589.20 ppb
2014-01-082706-803-14479.30 ppb
2014-01-082706-804-13459.20 ppb
2014-01-082706-805-14309.60 ppb
2014-01-082706-806-14009.00 ppb
2014-01-082706-807-16118.60 ppb
2014-01-082706-808-14159.60 ppb
2014-03-034417-004-0810ND
2014-03-034417-005-0830ND
2014-03-044417-003-0810ND
2014-04-092706-801-142713.0 ppb
2014-04-092706-802-141011.0 ppb
2014-04-092706-803-135514.0 ppb
2014-04-092706-804-125011.0 ppb
2014-04-092706-805-134010.00 ppb
2014-04-092706-806-130510.00 ppb
2014-04-092706-807-150711.0 ppb
2014-04-092706-808-132011.0 ppb
2014-05-154417-003-0840ND
2014-06-184417-002-1300ND
2014-07-092706-801-155518.0 ppb
2014-07-092706-802-154018.0 ppb
2014-07-092706-803-153015.0 ppb
2014-07-092706-804-142019.0 ppb
2014-07-092706-805-151419.0 ppb
2014-07-092706-806-144322.0 ppb
2014-07-092706-807-164018.0 ppb
2014-07-092706-808-145821.0 ppb
2014-08-214417-003-0855ND
2014-10-082706-801-13107.10 ppb
2014-10-082706-802-12557.10 ppb
2014-10-082706-803-124016.0 ppb
2014-10-082706-804-11556.70 ppb
2014-10-082706-805-12257.30 ppb
2014-10-082706-806-12057.00 ppb
2014-10-082706-807-13557.20 ppb
2014-10-082706-808-12157.10 ppb
2015-01-142706-801-13378.10 ppb
2015-01-142706-802-13238.00 ppb
2015-01-142706-803-13157.80 ppb
2015-01-142706-804-12158.10 ppb
2015-01-142706-805-13008.40 ppb
2015-01-142706-806-12287.70 ppb
2015-01-142706-807-14258.00 ppb
2015-01-142706-808-12458.30 ppb
2015-03-024417-004-0815ND
2015-03-024417-005-0835ND
2015-04-082706-801-151818.0 ppb
2015-04-082706-802-150514.0 ppb
2015-04-082706-803-145715.0 ppb
2015-04-082706-804-140516.0 ppb
2015-04-082706-805-144217.0 ppb
2015-04-082706-806-141517.0 ppb
2015-04-082706-807-160217.0 ppb
2015-04-082706-808-143014.0 ppb
2015-05-044417-002-1050ND
2015-05-044417-003-1115ND
2015-07-082706-801-14232.10 ppb
2015-07-082706-802-13582.10 ppb
2015-07-082706-803-14102.10 ppb
2015-07-082706-804-13002.10 ppb
2015-07-082706-805-13412.10 ppb
2015-07-082706-806-13132.10 ppb
2015-07-082706-807-15062.20 ppb
2015-07-082706-808-13252.20 ppb
2015-10-142706-801-135010.00 ppb
2015-10-142706-802-13308.80 ppb
2015-10-142706-803-134014.0 ppb
2015-10-142706-804-125012.0 ppb
2015-10-142706-805-132011.0 ppb
2015-10-142706-806-130010.00 ppb
2015-10-142706-807-14309.30 ppb
2015-10-142706-808-131012.0 ppb
2016-01-132706-801-15409.00 ppb
2016-01-132706-802-15267.20 ppb
2016-01-132706-803-151610.00 ppb
2016-01-132706-804-14109.30 ppb
2016-01-132706-805-15007.70 ppb
2016-01-132706-806-14247.90 ppb
2016-01-132706-807-16208.50 ppb
2016-01-132706-808-14427.90 ppb
2016-02-294417-004-1045ND
2016-02-294417-005-0805ND
2016-04-132706-801-1345ND
2016-04-132706-802-1330ND
2016-04-132706-803-1322ND
2016-04-132706-804-1214ND
2016-04-132706-805-1305ND
2016-04-132706-806-1242ND
2016-04-132706-807-1425ND
2016-04-132706-808-1253ND
2016-05-094417-002-0840ND
2016-05-094417-003-0850ND
2016-06-164417-004-1100ND
2016-06-164417-004-1115ND
2016-07-132706-801-16122.70 ppb
2016-07-132706-802-16008.80 ppb
2016-07-132706-803-15532.80 ppb
2016-07-132706-804-150012.0 ppb
2016-07-132706-805-15385.70 ppb
2016-07-132706-806-15158.60 ppb
2016-07-132706-807-16484.90 ppb
2016-07-132706-808-152511.0 ppb
2016-10-122706-801-13251.30 ppb
2016-10-122706-802-13121.10 ppb
2016-10-122706-803-13051.20 ppb
2016-10-122706-804-12101.40 ppb
2016-10-122706-805-12501.40 ppb
2016-10-122706-806-12201.10 ppb
2016-10-122706-807-14171.40 ppb
2016-10-122706-808-12351.10 ppb
2016-11-014417-005-0835ND
2017-01-112706-801-1330ND
2017-01-112706-802-1317ND
2017-01-112706-803-13106.50 ppb
2017-01-112706-804-1218ND
2017-01-112706-805-1250ND
2017-01-112706-806-1228ND
2017-01-112706-807-1410ND
2017-01-112706-808-1238ND
2017-02-094417-004-0950ND
2017-02-094417-005-0930ND
2017-03-224417-004-1105ND
2017-03-224417-004-1120ND
2017-03-224417-005-1125ND
2017-03-224417-005-1140ND
2017-04-122706-801-14387.30 ppb
2017-04-122706-802-14165.60 ppb
2017-04-122706-803-142724.0 ppb
2017-04-122706-804-13145.60 ppb
2017-04-122706-805-14035.10 ppb
2017-04-122706-806-13265.10 ppb
2017-04-122706-807-15225.00 ppb
2017-04-122706-808-13486.00 ppb
2017-05-034417-002-1235ND
2017-05-034417-003-1220ND
2017-07-122706-801-07566.40 ppb
2017-07-122706-802-07206.00 ppb
2017-07-122706-803-07356.20 ppb
2017-07-122706-804-06025.70 ppb
2017-07-122706-805-06554.90 ppb
2017-07-122706-806-06155.80 ppb
2017-07-122706-807-09245.70 ppb
2017-07-122706-808-06325.50 ppb
2017-10-112706-801-13013.20 ppb
2017-10-112706-802-12193.10 ppb
2017-10-112706-803-12333.10 ppb
2017-10-112706-804-11013.40 ppb
2017-10-112706-805-11564.30 ppb
2017-10-112706-806-11173.50 ppb
2017-10-112706-807-14113.70 ppb
2017-10-112706-808-11333.70 ppb
2018-01-102706-801-13182.20 ppb
2018-01-102706-802-12472.10 ppb
2018-01-102706-803-13012.00 ppb
2018-01-102706-804-11312.40 ppb
2018-01-102706-805-12292.20 ppb
2018-01-102706-806-11502.30 ppb
2018-01-102706-807-14232.40 ppb
2018-01-102706-808-12072.40 ppb
2018-01-234417-004-0820ND
2018-01-234417-005-0840ND
2018-04-112706-801-15334.10 ppb
2018-04-112706-802-15013.90 ppb
2018-04-112706-803-15144.00 ppb
2018-04-112706-804-13524.20 ppb
2018-04-112706-805-14454.20 ppb
2018-04-112706-806-14064.00 ppb
2018-04-112706-807-05184.10 ppb
2018-04-112706-808-14224.20 ppb
2018-05-034417-002-1020ND
2018-05-034417-003-1035ND
2018-05-034417-004-0950ND
2018-05-144417-005-0810ND
2018-07-112706-801-16394.00 ppb
2018-07-112706-802-16004.10 ppb
2018-07-112706-803-16164.50 ppb
2018-07-112706-804-14204.00 ppb
2018-07-112706-805-15354.00 ppb
2018-07-112706-806-14394.00 ppb
2018-07-112706-807-18104.20 ppb
2018-07-112706-808-15034.10 ppb
2018-08-024417-004-0810ND
2018-09-194417-005-0735ND
2018-10-084417-005-0835ND
2018-10-102706-801-16252.20 ppb
2018-10-102706-802-14522.30 ppb
2018-10-102706-803-15122.10 ppb
2018-10-102706-804-13042.30 ppb
2018-10-102706-805-14282.30 ppb
2018-10-102706-806-13282.30 ppb
2018-10-102706-807-17402.30 ppb
2018-10-102706-808-13502.30 ppb
2018-10-164417-005-0815ND
2019-01-102706-801-10504.80 ppb
2019-01-102706-802-10085.10 ppb
2019-01-102706-803-10275.50 ppb
2019-01-102706-804-08454.90 ppb
2019-01-102706-805-09505.00 ppb
2019-01-102706-806-09045.00 ppb
2019-01-102706-807-11474.90 ppb
2019-01-102706-808-09245.30 ppb
2019-01-294417-002-0920ND
2019-01-294417-003-0850ND
2019-01-294417-004-0820ND
2019-01-294417-005-0800ND
2019-04-102706-801-1550ND
2019-04-102706-802-15102.30 ppb
2019-04-102706-803-15285.40 ppb
2019-04-102706-804-1310ND
2019-04-102706-805-1444ND
2019-04-102706-806-1338ND
2019-04-102706-807-18045.40 ppb
2019-04-102706-808-1400ND
2019-04-254417-004-0920ND
2019-04-254417-005-0855ND
2019-07-254417-002-0945ND
2019-07-254417-003-1000ND
2019-07-254417-004-0855ND
2019-07-254417-005-0910ND
2019-08-022706-801-07292.10 ppb
2019-08-022706-802-08122.20 ppb
2019-08-022706-803-07522.10 ppb
2019-08-022706-804-09522.10 ppb
2019-08-022706-805-08452.10 ppb
2019-08-022706-806-09322.30 ppb
2019-08-022706-807-07012.20 ppb
2019-08-022706-808-09102.20 ppb
2019-10-034417-004-0800ND
2019-10-034417-005-0815ND
2019-10-092706-801-05452.60 ppb
2019-10-092706-802-05552.70 ppb
2019-10-092706-803-06042.40 ppb
2019-10-092706-804-06102.80 ppb
2019-10-092706-805-06202.20 ppb
2019-10-092706-806-06302.80 ppb
2019-10-092706-807-06432.90 ppb
2019-10-092706-808-06552.90 ppb