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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Clear Lake City Water Authority

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

 

192

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
20140.219 ppb321ND - 7.00 ppb
20151.27 ppb328ND - 6.50 ppb
20160.663 ppb326ND - 4.80 ppb
20170.378 ppb322ND - 7.70 ppb
20180.769 ppb327ND - 4.90 ppb
20192.02 ppb3213ND - 6.90 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
2014-02-26AC44728ND
2014-02-26AC44700ND
2014-02-26AC44702ND
2014-02-26AC44704ND
2014-02-26AC44731ND
2014-02-26AC44727ND
2014-02-26AC44698ND
2014-02-26AC44724ND
2014-04-22AC51364ND
2014-04-22AC51383ND
2014-04-22AC51358ND
2014-04-22AC51363ND
2014-04-22AC51362ND
2014-04-22AC51379ND
2014-04-22AC51377ND
2014-04-22AC51380ND
2014-07-22AC60555ND
2014-07-22AC60558ND
2014-07-22AC60553ND
2014-07-22AC60569ND
2014-07-22AC60567ND
2014-07-22AC60565ND
2014-07-22AC60575ND
2014-07-22AC60605ND
2014-11-12AC71881ND
2014-11-12AC71887ND
2014-11-12AC71889ND
2014-11-12AC71891ND
2014-11-12AC71876ND
2014-11-12AC71875ND
2014-11-12AC71880ND
2014-11-12AC719127.00 ppb
2015-01-20AC769026.00 ppb
2015-01-20AC76942ND
2015-01-20AC768995.00 ppb
2015-01-20AC76905ND
2015-01-20AC76922ND
2015-01-20AC769004.80 ppb
2015-01-20AC769016.50 ppb
2015-01-20AC76917ND
2015-05-08AC91261ND
2015-05-08AC91280ND
2015-05-08AC912912.60 ppb
2015-05-08AC91279ND
2015-05-08AC91254ND
2015-05-08AC91263ND
2015-05-08AC91260ND
2015-05-08AC91278ND
2015-08-19AD04659ND
2015-08-19AD046664.10 ppb
2015-08-19AD046655.10 ppb
2015-08-19AD04657ND
2015-08-19AD04653ND
2015-08-19AD046626.40 ppb
2015-08-19AD04654ND
2015-08-19AD04663ND
2015-11-06AD12925ND
2015-11-06AD12941ND
2015-11-06AD12928ND
2015-11-06AD12945ND
2015-11-06AD12926ND
2015-11-06AD12924ND
2015-11-06AD12923ND
2015-11-06AD12927ND
2016-01-19AD185664.00 ppb
2016-01-19AD18573ND
2016-01-19AD185642.60 ppb
2016-01-19AD18576ND
2016-01-19AD185654.80 ppb
2016-01-19AD185682.60 ppb
2016-01-19AD18569ND
2016-01-19AD18577ND
2016-05-03AD35028ND
2016-05-03AD35029ND
2016-05-03AD35024ND
2016-05-03AD35026ND
2016-05-03AD35025ND
2016-05-03AD35032ND
2016-05-03AD35030ND
2016-05-03AD35033ND
2016-07-13AD44030ND
2016-07-13AD44027ND
2016-07-13AD440294.70 ppb
2016-07-13AD44025ND
2016-07-13AD44021ND
2016-07-13AD44046ND
2016-07-13AD44022ND
2016-07-13AD440282.50 ppb
2016-12-02AD60312ND
2016-12-02AD60310ND
2016-12-02AD60307ND
2016-12-02AD60308ND
2016-12-02AD60309ND
2016-12-02AD60306ND
2016-12-02AD60311ND
2016-12-02AD60277ND
2017-01-19AD65686ND
2017-01-19AD656974.40 ppb
2017-01-19AD65682ND
2017-01-19AD65694ND
2017-01-19AD65684ND
2017-01-19AD65685ND
2017-01-19AD65695ND
2017-01-19AD65691ND
2017-04-19AD80156ND
2017-04-19AD80154ND
2017-04-19AD80148ND
2017-04-19AD80152ND
2017-04-19AD80155ND
2017-04-21AD80626ND
2017-04-21AD80627ND
2017-04-21AD80624ND
2017-07-20AD90102ND
2017-07-20AD90108ND
2017-07-20AD90106ND
2017-07-20AD90105ND
2017-07-20AD90104ND
2017-07-20AD90101ND
2017-07-20AD90109ND
2017-07-20AD90107ND
2017-10-25AE02087ND
2017-10-25AE02083ND
2017-10-25AE02086ND
2017-10-25AE02080ND
2017-10-25AE02084ND
2017-10-25AE020817.70 ppb
2017-10-25AE02082ND
2017-10-25AE02079ND
2018-02-20AE14393ND
2018-02-20AE14392ND
2018-02-20AE143954.20 ppb
2018-02-20AE14404ND
2018-02-20AE14398ND
2018-02-20AE143914.90 ppb
2018-02-20AE14403ND
2018-02-20AE143893.60 ppb
2018-04-24AE23675ND
2018-04-24AE23676ND
2018-04-24AE23668ND
2018-04-24AE23674ND
2018-04-24AE23669ND
2018-04-24AE23673ND
2018-04-24AE23670ND
2018-04-24AE23671ND
2018-08-22AE38104ND
2018-08-22AE38100ND
2018-08-22AE381082.40 ppb
2018-08-22AE38105ND
2018-08-22AE38101ND
2018-08-22AE38107ND
2018-08-22AE38106ND
2018-08-22AE38102ND
2018-11-06AE45392ND
2018-11-06AE453963.20 ppb
2018-11-06AE453972.60 ppb
2018-11-06AE45390ND
2018-11-06AE45398ND
2018-11-06AE45393ND
2018-11-06AE45395ND
2018-11-06AE453943.70 ppb
2019-02-27AE56224ND
2019-02-27AE56223ND
2019-02-27AE562182.60 ppb
2019-02-27AE562215.30 ppb
2019-02-27AE56217ND
2019-02-27AE56220ND
2019-02-27AE56222ND
2019-02-27AE562162.60 ppb
2019-04-03AE61006ND
2019-04-03AE61008ND
2019-04-03AE61007ND
2019-04-03AE61005ND
2019-04-03AE61011ND
2019-04-03AE61004ND
2019-04-03AE61003ND
2019-04-03AE61009ND
2019-07-17AE74790ND
2019-07-17AE74844ND
2019-07-17AE74779ND
2019-07-17AE74843ND
2019-07-17AE748186.50 ppb
2019-07-17AE74845ND
2019-07-17AE74780ND
2019-07-17AE748235.30 ppb
2019-10-03AE856526.40 ppb
2019-10-03AE856485.70 ppb
2019-10-03AE856495.00 ppb
2019-10-03AE856533.00 ppb
2019-10-03AE856465.60 ppb
2019-10-03AE856515.10 ppb
2019-10-03AE856506.90 ppb
2019-10-03AE856544.70 ppb