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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

El Dorado ID - Main

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

 

244

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
20142.05 ppb3315ND - 10.00 ppb
20152.05 ppb3315ND - 7.80 ppb
20162.11 ppb3414ND - 11.0 ppb
20171.97 ppb3116ND - 6.60 ppb
20182.46 ppb4223ND - 8.50 ppb
20192.45 ppb7142ND - 8.00 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
2014-02-039590-004-1020ND
2014-02-119590-901-10394.10 ppb
2014-02-119590-902-13454.90 ppb
2014-02-119590-903-09163.40 ppb
2014-02-119590-905-12152.50 ppb
2014-02-119590-907-092010.00 ppb
2014-02-119590-908-12204.00 ppb
2014-02-119590-909-1050ND
2014-02-119590-910-10104.50 ppb
2014-05-139590-907-09209.50 ppb
2014-05-139590-908-13302.40 ppb
2014-05-139590-909-12006.70 ppb
2014-05-139590-910-10102.80 ppb
2014-05-149590-901-1116ND
2014-05-149590-902-1500ND
2014-05-149590-903-09503.60 ppb
2014-05-149590-905-1310ND
2014-08-139590-907-09252.80 ppb
2014-08-139590-908-1325ND
2014-08-139590-909-1225ND
2014-08-139590-910-1015ND
2014-08-159590-901-1105ND
2014-08-159590-902-1420ND
2014-08-159590-903-09402.90 ppb
2014-08-159590-905-1305ND
2014-11-109590-901-1025ND
2014-11-109590-902-1330ND
2014-11-109590-903-09203.40 ppb
2014-11-109590-905-1205ND
2014-11-149590-907-1305ND
2014-11-149590-908-1345ND
2014-11-149590-909-1150ND
2014-11-149590-910-0900ND
2015-02-109590-901-11073.20 ppb
2015-02-109590-902-1417ND
2015-02-109590-903-09207.80 ppb
2015-02-109590-905-12496.40 ppb
2015-02-119590-907-09103.40 ppb
2015-02-119590-908-1320ND
2015-02-119590-909-10355.70 ppb
2015-02-119590-910-10005.40 ppb
2015-05-079590-910-09202.10 ppb
2015-05-129590-901-1025ND
2015-05-129590-902-1420ND
2015-05-129590-903-09022.50 ppb
2015-05-129590-905-1235ND
2015-05-129590-907-0920ND
2015-05-129590-908-1305ND
2015-05-129590-909-10505.10 ppb
2015-05-129590-910-1005ND
2015-08-109590-901-09453.50 ppb
2015-08-109590-902-1350ND
2015-08-109590-903-0815ND
2015-08-109590-905-1200ND
2015-08-149590-907-07502.90 ppb
2015-08-149590-908-1340ND
2015-08-149590-909-1255ND
2015-08-149590-910-1200ND
2015-11-099590-901-10202.80 ppb
2015-11-099590-902-1340ND
2015-11-099590-903-09156.40 ppb
2015-11-099590-905-12103.80 ppb
2015-11-099590-907-08456.60 ppb
2015-11-099590-908-1050ND
2015-11-099590-909-1010ND
2015-11-099590-910-0930ND
2016-02-099590-905-13009.10 ppb
2016-02-099590-907-09305.80 ppb
2016-02-099590-908-1230ND
2016-02-099590-909-11502.30 ppb
2016-02-099590-910-10152.30 ppb
2016-02-109590-901-10209.60 ppb
2016-02-109590-902-1250ND
2016-02-109590-903-091011.0 ppb
2016-05-129590-905-13104.60 ppb
2016-05-129590-907-09004.80 ppb
2016-05-129590-908-1105ND
2016-05-129590-909-1025ND
2016-05-129590-910-0945ND
2016-05-139590-901-10482.40 ppb
2016-05-139590-902-1318ND
2016-05-139590-903-09403.80 ppb
2016-08-099590-907-0945ND
2016-08-099590-908-1405ND
2016-08-099590-909-1120ND
2016-08-099590-910-1045ND
2016-08-119590-905-1315ND
2016-08-129590-901-1055ND
2016-08-129590-902-1255ND
2016-08-129590-903-09502.70 ppb
2016-09-139590-909-1300ND
2016-09-269590-909-1335ND
2016-11-089590-901-10103.30 ppb
2016-11-089590-902-1148ND
2016-11-089590-903-09006.80 ppb
2016-11-089590-907-09523.10 ppb
2016-11-089590-908-1330ND
2016-11-089590-909-1120ND
2016-11-089590-910-1035ND
2016-11-109590-905-1145ND
2017-02-079590-901-10453.10 ppb
2017-02-079590-903-09406.60 ppb
2017-02-079590-905-13404.30 ppb
2017-02-089590-902-0945ND
2017-02-089590-907-1045ND
2017-02-089590-908-1158ND
2017-02-089590-909-1135ND
2017-02-089590-910-11155.90 ppb
2017-05-089590-901-11253.60 ppb
2017-05-089590-903-14205.30 ppb
2017-05-089590-905-13203.80 ppb
2017-05-099590-907-09155.80 ppb
2017-05-099590-908-11502.20 ppb
2017-05-099590-909-1035ND
2017-05-099590-910-09553.80 ppb
2017-08-079590-901-10303.20 ppb
2017-08-079590-902-14003.50 ppb
2017-08-079590-903-09002.30 ppb
2017-08-079590-905-1240ND
2017-08-089590-907-09452.80 ppb
2017-08-089590-908-1300ND
2017-08-089590-909-1150ND
2017-08-089590-910-1030ND
2017-11-079590-901-1030ND
2017-11-079590-903-09152.60 ppb
2017-11-079590-905-1205ND
2017-11-089590-902-1355ND
2017-11-089590-907-09452.30 ppb
2017-11-089590-908-1445ND
2017-11-089590-909-1410ND
2017-11-089590-910-1330ND
2018-02-129590-901-10455.40 ppb
2018-02-129590-902-1335ND
2018-02-129590-903-09257.30 ppb
2018-02-129590-905-12353.90 ppb
2018-02-139590-907-09206.00 ppb
2018-02-139590-908-1225ND
2018-02-139590-909-1050ND
2018-02-139590-910-10025.30 ppb
2018-05-079590-901-12503.50 ppb
2018-05-079590-903-14156.50 ppb
2018-05-079590-905-10432.80 ppb
2018-05-079590-907-15158.50 ppb
2018-05-089590-909-12503.30 ppb
2018-05-089590-910-13304.00 ppb
2018-05-099590-902-1320ND
2018-05-099590-908-09254.50 ppb
2018-08-139590-901-11353.00 ppb
2018-08-139590-902-1435ND
2018-08-139590-903-10103.00 ppb
2018-08-139590-905-1315ND
2018-08-149590-907-09103.50 ppb
2018-08-149590-908-1220ND
2018-08-149590-909-1030ND
2018-08-149590-910-0950ND
2018-10-309590-901-10103.80 ppb
2018-10-309590-902-1325ND
2018-10-309590-903-08553.60 ppb
2018-10-309590-905-11352.00 ppb
2018-10-309590-907-14302.80 ppb
2018-11-139590-907-09153.80 ppb
2018-11-139590-908-1227ND
2018-11-139590-909-1010ND
2018-11-139590-910-1150ND
2018-11-149590-901-1035ND
2018-11-149590-902-1418ND
2018-11-149590-903-0920ND
2018-11-149590-905-1205ND
2018-12-119590-901-10004.90 ppb
2018-12-119590-902-1450ND
2018-12-119590-903-08406.30 ppb
2018-12-119590-905-1335ND
2018-12-129590-907-09125.80 ppb
2019-01-089590-901-10505.10 ppb
2019-01-089590-902-1415ND
2019-01-089590-903-09305.80 ppb
2019-01-089590-905-12102.00 ppb
2019-01-089590-907-15104.00 ppb
2019-02-159590-901-11005.30 ppb
2019-02-159590-902-1315ND
2019-02-159590-903-09306.20 ppb
2019-02-159590-907-09203.60 ppb
2019-02-159590-908-1220ND
2019-02-159590-909-10122.30 ppb
2019-02-159590-910-1138ND
2019-03-139590-901-10205.90 ppb
2019-03-139590-902-1350ND
2019-03-139590-903-09005.30 ppb
2019-03-139590-905-11504.20 ppb
2019-03-139590-907-14453.60 ppb
2019-04-099590-901-10207.10 ppb
2019-04-099590-902-1315ND
2019-04-099590-903-09058.00 ppb
2019-04-099590-905-11255.30 ppb
2019-04-099590-907-14204.70 ppb
2019-05-149590-901-1050ND
2019-05-149590-902-1355ND
2019-05-149590-903-09104.00 ppb
2019-05-149590-905-1200ND
2019-05-149590-907-09123.00 ppb
2019-05-149590-908-1300ND
2019-05-149590-909-10352.40 ppb
2019-05-149590-910-12102.70 ppb
2019-06-119590-901-1010ND
2019-06-119590-902-1252ND
2019-06-119590-903-0850ND
2019-06-119590-905-1115ND
2019-06-119590-907-1347ND
2019-07-099590-901-1035ND
2019-07-099590-902-1410ND
2019-07-099590-903-0905ND
2019-07-099590-905-1205ND
2019-07-099590-907-1512ND
2019-08-139590-901-10354.40 ppb
2019-08-139590-902-13504.00 ppb
2019-08-139590-903-09153.70 ppb
2019-08-139590-905-1150ND
2019-08-139590-907-09404.50 ppb
2019-08-139590-908-12452.10 ppb
2019-08-139590-909-1030ND
2019-08-139590-910-1215ND
2019-09-109590-901-11053.90 ppb
2019-09-109590-902-13553.30 ppb
2019-09-109590-903-09303.30 ppb
2019-09-109590-905-1220ND
2019-09-109590-907-15004.60 ppb
2019-10-089590-901-1045ND
2019-10-089590-902-13452.60 ppb
2019-10-089590-903-09204.20 ppb
2019-10-089590-905-12002.20 ppb
2019-10-089590-907-14505.10 ppb
2019-11-129590-901-10404.40 ppb
2019-11-129590-902-1355ND
2019-11-129590-903-09154.10 ppb
2019-11-129590-905-12053.90 ppb
2019-11-129590-907-15053.80 ppb
2019-11-129590-908-1200ND
2019-11-129590-909-1015ND
2019-11-129590-910-11302.10 ppb
2019-12-109590-901-10154.40 ppb
2019-12-109590-902-1350ND
2019-12-109590-903-08455.20 ppb
2019-12-109590-905-11353.50 ppb
2019-12-109590-907-14554.50 ppb