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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Albany

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.

 

253

Samples

0

Samples exceeding legal limit (MCL)

122

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.30 ppb5922ND - 10.00 ppb
20152.12 ppb3318ND - 8.80 ppb
20162.43 ppb3323ND - 10.00 ppb
20171.67 ppb5922ND - 14.0 ppb
20182.68 ppb3615ND - 13.0 ppb
20193.32 ppb3322ND - 11.0 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
2014-02-11AI280554.20 ppb
2014-02-11AI280563.70 ppb
2014-02-11AI280573.70 ppb
2014-02-11AI280581.60 ppb
2014-02-11AI28059ND
2014-02-11AI28060ND
2014-02-11AI28061ND
2014-02-11AI28062ND
2014-03-04AI29212ND
2014-03-04AI29213ND
2014-03-04AI29214ND
2014-03-04AI29215ND
2014-03-04AI29216ND
2014-03-04AI29217ND
2014-03-04AI29218ND
2014-03-04AI29219ND
2014-03-04AI29220ND
2014-03-04AI29221ND
2014-03-06AI29421ND
2014-03-06AI29422ND
2014-03-06AI29423ND
2014-03-06AI29424ND
2014-03-06AI29425ND
2014-03-06AI29426ND
2014-03-06AI29427ND
2014-03-06AI29428ND
2014-03-06AI29429ND
2014-03-06AI29430ND
2014-03-10AI29541ND
2014-03-10AI29542ND
2014-03-10AI29543ND
2014-03-10AI29544ND
2014-03-10AI29545ND
2014-04-09AI378090.670 ppb
2014-04-22AI38636ND
2014-05-07AI402263.40 ppb
2014-05-07AI40227ND
2014-05-07AI40228ND
2014-05-07AI402296.30 ppb
2014-05-07AI402302.10 ppb
2014-05-07AI40231ND
2014-05-07AI402322.00 ppb
2014-05-07AI402331.80 ppb
2014-08-11AI4965610.00 ppb
2014-08-11AI496576.90 ppb
2014-08-11AI496589.70 ppb
2014-08-11AI49659ND
2014-08-11AI49660ND
2014-08-11AI49661ND
2014-08-11AI496621.20 ppb
2014-08-11AI496631.20 ppb
2014-11-13AI595974.70 ppb
2014-11-13AI595983.70 ppb
2014-11-13AI595995.00 ppb
2014-11-13AI596001.30 ppb
2014-11-13AI596011.10 ppb
2014-11-13AI596021.20 ppb
2014-11-13AI596031.30 ppb
2014-11-13AI59604ND
2015-02-10AI648653.90 ppb
2015-02-10AI648663.20 ppb
2015-02-10AI648673.00 ppb
2015-02-10AI64868ND
2015-02-10AI648691.40 ppb
2015-02-10AI64870ND
2015-02-10AI64871ND
2015-02-10AI64872ND
2015-05-04AI76184ND
2015-05-11AI770374.40 ppb
2015-05-11AI770383.90 ppb
2015-05-11AI770395.10 ppb
2015-05-11AI77040ND
2015-05-11AI77041ND
2015-05-11AI77042ND
2015-05-11AI77043ND
2015-05-11AI77044ND
2015-08-11AI863818.40 ppb
2015-08-11AI863826.60 ppb
2015-08-11AI863838.80 ppb
2015-08-11AI863842.60 ppb
2015-08-11AI86385ND
2015-08-11AI86386ND
2015-08-11AI86387ND
2015-08-11AI86388ND
2015-11-10AJ009304.90 ppb
2015-11-10AJ009313.70 ppb
2015-11-10AJ009324.70 ppb
2015-11-10AJ009331.10 ppb
2015-11-10AJ009341.000 ppb
2015-11-10AJ009352.20 ppb
2015-11-10AJ009361.10 ppb
2015-11-10AJ00937ND
2016-02-10AJ063782.90 ppb
2016-02-10AJ063792.70 ppb
2016-02-10AJ063803.10 ppb
2016-02-10AJ06381ND
2016-02-10AJ063821.20 ppb
2016-02-10AJ063831.30 ppb
2016-02-10AJ06384ND
2016-02-10AJ06385ND
2016-03-02AJ075140.780 ppb
2016-05-10AJ120847.50 ppb
2016-05-10AJ120854.60 ppb
2016-05-10AJ120865.10 ppb
2016-05-10AJ12087ND
2016-05-10AJ120881.20 ppb
2016-05-10AJ12089ND
2016-05-10AJ120901.20 ppb
2016-05-10AJ12091ND
2016-08-08AJ220076.20 ppb
2016-08-08AJ220085.10 ppb
2016-08-08AJ220095.70 ppb
2016-08-08AJ220102.50 ppb
2016-08-08AJ220111.10 ppb
2016-08-08AJ22012ND
2016-08-08AJ22013ND
2016-08-08AJ220141.10 ppb
2016-11-08AJ3330010.00 ppb
2016-11-08AJ333016.00 ppb
2016-11-08AJ333025.60 ppb
2016-11-08AJ33303ND
2016-11-08AJ333041.70 ppb
2016-11-08AJ33305ND
2016-11-08AJ333061.80 ppb
2016-11-08AJ333071.70 ppb
2017-02-08AJ462324.90 ppb
2017-02-08AJ462333.50 ppb
2017-02-08AJ462344.30 ppb
2017-02-08AJ462351.60 ppb
2017-02-08AJ46236ND
2017-02-08AJ46237ND
2017-02-08AJ46238ND
2017-02-08AJ46239ND
2017-05-09AJ55093ND
2017-05-09AJ55094ND
2017-05-09AJ55095ND
2017-05-09AJ55096ND
2017-05-09AJ55097ND
2017-05-09AJ55099ND
2017-05-09AJ55100ND
2017-05-09AJ55101ND
2017-05-09AJ55102ND
2017-05-09AJ55104ND
2017-05-09AJ55105ND
2017-05-09AJ55106ND
2017-05-09AJ55107ND
2017-05-09AJ55108ND
2017-05-09AJ55109ND
2017-05-09AJ55110ND
2017-05-09AJ55111ND
2017-05-09AJ55112ND
2017-05-09AJ552266.70 ppb
2017-05-09AJ552276.10 ppb
2017-05-09AJ552286.40 ppb
2017-05-09AJ55229ND
2017-05-09AJ55230ND
2017-05-09AJ552311.50 ppb
2017-05-09AJ55232ND
2017-05-09AJ55233ND
2017-05-10AJ55234ND
2017-05-10AJ552360.750 ppb
2017-05-10AJ55237ND
2017-05-17AJ55706ND
2017-05-17AJ557070.790 ppb
2017-05-17AJ55708ND
2017-05-17AJ55709ND
2017-05-17AJ55710ND
2017-06-22AJ58367ND
2017-08-09AJ6392014.0 ppb
2017-08-09AJ6392110.00 ppb
2017-08-09AJ639228.40 ppb
2017-08-09AJ639231.90 ppb
2017-08-09AJ639241.70 ppb
2017-08-09AJ639252.50 ppb
2017-08-09AJ639261.30 ppb
2017-08-09AJ63927ND
2017-11-07AJ736707.10 ppb
2017-11-07AJ736716.70 ppb
2017-11-07AJ736726.10 ppb
2017-11-07AJ73673ND
2017-11-07AJ736741.30 ppb
2017-11-07AJ73675ND
2017-11-07AJ736761.10 ppb
2017-11-07AJ73677ND
2018-01-25AJ779701.10 ppb
2018-02-06AJ835045.90 ppb
2018-02-06AJ835053.80 ppb
2018-02-06AJ835063.80 ppb
2018-02-06AJ835071.60 ppb
2018-02-06AJ83508ND
2018-02-06AJ83509ND
2018-02-06AJ83510ND
2018-02-06AJ83511ND
2018-05-09AJ893429.60 ppb
2018-05-09AJ89343ND
2018-05-09AJ89344ND
2018-05-09AJ89345ND
2018-05-09AJ89346ND
2018-05-09AJ89347ND
2018-05-09AJ89348ND
2018-05-09AJ89349ND
2018-08-07AJ9738712.0 ppb
2018-08-07AJ973888.80 ppb
2018-08-07AJ973898.20 ppb
2018-08-07AJ97390ND
2018-08-07AJ973911.30 ppb
2018-08-07AJ97392ND
2018-08-07AJ97393ND
2018-08-07AJ97394ND
2018-11-12AK0608713.0 ppb
2018-11-12AK0608813.0 ppb
2018-11-12AK0608911.0 ppb
2018-11-12AK060901.50 ppb
2018-11-12AK06091ND
2018-11-12AK060921.80 ppb
2018-11-12AK06093ND
2018-11-12AK06094ND
2018-12-26AK08589ND
2018-12-26AK08590ND
2018-12-26AK08591ND
2019-02-12AK113366.10 ppb
2019-02-12AK113374.80 ppb
2019-02-12AK113384.40 ppb
2019-02-12AK113391.20 ppb
2019-02-12AK11340ND
2019-02-12AK113411.000 ppb
2019-02-12AK11342ND
2019-02-12AK11343ND
2019-04-04AK146770.600 ppb
2019-05-06AK167849.70 ppb
2019-05-06AK167856.90 ppb
2019-05-06AK167866.10 ppb
2019-05-06AK16787ND
2019-05-06AK16788ND
2019-05-21AK181903.00 ppb
2019-05-21AK18191ND
2019-05-21AK181922.40 ppb
2019-08-13AK2628411.0 ppb
2019-08-13AK2628511.0 ppb
2019-08-13AK262867.20 ppb
2019-08-13AK262872.20 ppb
2019-08-13AK26288ND
2019-08-13AK262891.70 ppb
2019-08-13AK26290ND
2019-08-13AK26291ND
2019-11-11AK366158.70 ppb
2019-11-11AK366167.30 ppb
2019-11-11AK366177.60 ppb
2019-11-11AK366183.40 ppb
2019-11-11AK366191.40 ppb
2019-11-11AK366201.70 ppb
2019-11-11AK36621ND
2019-11-11AK36622ND