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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Henderson-Kerr Lake Reg Water

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND160ND
20150.813 ppb165ND - 2.90 ppb
20160.269 ppb162ND - 2.20 ppb
20171.94 ppb1611ND - 4.10 ppb
20180.831 ppb165ND - 3.10 ppb
20191.03 ppb167ND - 2.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-1192189677002-2ND
2014-02-1192189677003-2ND
2014-02-1192189677004-2ND
2014-02-1192189677001-2ND
2014-05-1392201161001TTH-2ND
2014-05-1392201161002TTH-2ND
2014-05-1392201161003TTH-2ND
2014-05-1392201161004TTH-2ND
2014-08-1292213201001TTH-2ND
2014-08-1292213201002TTH-2ND
2014-08-1292213201003TTH-2ND
2014-08-1292213201004TTH-2ND
2014-11-1292225453003TTH-2ND
2014-11-1292225453002TTH-2ND
2014-11-1292225453001TTH-2ND
2014-11-1392225453004TTH-2ND
2015-02-10ND
2015-02-10ND
2015-02-10ND
2015-02-10ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-05-12ND
2015-08-112.10 ppb
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-11-102.70 ppb
2015-11-102.60 ppb
2015-11-102.90 ppb
2015-11-102.70 ppb
2016-02-0992285879004TTH-2ND
2016-02-0992285879003TTH-2ND
2016-02-0992285879002TTH-2ND
2016-02-0992285879001TTH-2ND
2016-05-1092297063004TTH-2ND
2016-05-1092297063003TTH-2ND
2016-05-1092297063002TTH-2ND
2016-05-1092297063001TTH-2ND
2016-08-0992308578001TTH-2ND
2016-08-0992308578002TTH-22.10 ppb
2016-08-0992308578003TTH-22.20 ppb
2016-08-0992308578004TTH-2ND
2016-11-0892318998003TTH-2ND
2016-11-0892318998004TTH-2ND
2016-11-0892318998006TTH-2ND
2016-11-0892318998011TTH-2ND
2017-02-1592330204004TTHND
2017-02-1592330204011TTH2.20 ppb
2017-02-1592330204006TTH3.00 ppb
2017-02-1592330204007TTHND
2017-05-0992340094001TTH2.50 ppb
2017-05-0992340094002TTH2.70 ppb
2017-05-0992340094003TTH2.40 ppb
2017-05-0992340094004TTH2.40 ppb
2017-08-0892350856011TTH3.70 ppb
2017-08-0892350856010TTH2.70 ppb
2017-08-0892350856008TTH3.20 ppb
2017-08-0892350856003TTH4.10 ppb
2017-11-1492363440001TTHND
2017-11-1492363440002TTHND
2017-11-1492363440005TTH2.20 ppb
2017-11-1492363440006TTHND
2018-02-1392373408008TTH ND
2018-02-1392373408005TTH ND
2018-02-1392373408004TTH ND
2018-02-1392373408001TTH 2.60 ppb
2018-05-0192383116004TTH ND
2018-05-0192383116001TTH ND
2018-05-0192383116002TTH ND
2018-05-0192383116003TTH ND
2018-08-0892395245004TTH ND
2018-08-0892395245003TTH 3.10 ppb
2018-08-0892395245002TTH 2.30 ppb
2018-08-0892395245001TTH ND
2018-11-0692406545003TTH ND
2018-11-0692406545007TTH 2.60 ppb
2018-11-0692406545008TTH 2.70 ppb
2018-11-0692406545011TTH ND
2019-02-0592416954001_3770ND
2019-02-0592416954002_3770ND
2019-02-0592416954003_37702.20 ppb
2019-02-0592416954004_3770ND
2019-05-0792428873001_37702.70 ppb
2019-05-0792428873004_37702.30 ppb
2019-05-0792428873003_37702.20 ppb
2019-05-0792428873002_3770ND
2019-08-0692440471004_3770ND
2019-08-0692440471008_3770ND
2019-08-0692440471005_3770ND
2019-08-0692440471001_3770ND
2019-11-0592452959004_3770ND
2019-11-0592452959003_37702.20 ppb
2019-11-0592452959002_37702.30 ppb
2019-11-0592452959001_37702.50 ppb