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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Opelousas Water System

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
20140.627 ppb326ND - 5.00 ppb
2015ND320ND
2016ND320ND
20170.442 ppb3212ND - 1.90 ppb
20180.131 ppb324ND - 1.10 ppb
20190.144 ppb322ND - 2.30 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
2014-02-24680-98951-10.530 ppb
2014-02-24680-98951-2ND
2014-02-24680-98951-3ND
2014-02-24680-98951-4ND
2014-02-24680-98951-10.530 ppb
2014-02-24680-98951-2ND
2014-02-24680-98951-3ND
2014-02-24680-98951-4ND
2014-06-02680-101971-14.50 ppb
2014-06-02680-101971-25.00 ppb
2014-06-02680-101971-3ND
2014-06-02680-101971-4ND
2014-06-02680-101971-14.50 ppb
2014-06-02680-101971-25.00 ppb
2014-06-02680-101971-3ND
2014-06-02680-101971-4ND
2014-08-06680-104100-6ND
2014-08-06680-104100-7ND
2014-08-06680-104100-8ND
2014-08-06680-104100-9ND
2014-08-06680-104100-6ND
2014-08-06680-104100-7ND
2014-08-06680-104100-8ND
2014-08-06680-104100-9ND
2014-11-05680-107074-1ND
2014-11-05680-107074-2ND
2014-11-05680-107074-3ND
2014-11-05680-107074-4ND
2014-11-05680-107074-1ND
2014-11-05680-107074-2ND
2014-11-05680-107074-3ND
2014-11-05680-107074-4ND
2015-02-10680-109880-1ND
2015-02-10680-109880-2ND
2015-02-10680-109880-3ND
2015-02-10680-109880-4ND
2015-02-10680-109880-1ND
2015-02-10680-109880-2ND
2015-02-10680-109880-3ND
2015-02-10680-109880-4ND
2015-05-06680-112382-1ND
2015-05-06680-112382-2ND
2015-05-06680-112382-3ND
2015-05-06680-112382-4ND
2015-05-06680-112382-1ND
2015-05-06680-112382-2ND
2015-05-06680-112382-3ND
2015-05-06680-112382-4ND
2015-08-05680-115394-1ND
2015-08-05680-115394-2ND
2015-08-05680-115394-3ND
2015-08-05680-115394-4ND
2015-08-05680-115394-1ND
2015-08-05680-115394-2ND
2015-08-05680-115394-3ND
2015-08-05680-115394-4ND
2015-11-12680-119028-1ND
2015-11-12680-119028-2ND
2015-11-12680-119028-3ND
2015-11-12680-119028-4ND
2015-11-12680-119028-1ND
2015-11-12680-119028-2ND
2015-11-12680-119028-3ND
2015-11-12680-119028-4ND
2016-02-11680-121842-5ND
2016-02-11680-121842-6ND
2016-02-11680-121842-7ND
2016-02-11680-121842-8ND
2016-02-11680-121842-5ND
2016-02-11680-121842-6ND
2016-02-11680-121842-7ND
2016-02-11680-121842-8ND
2016-05-10680-125205-10ND
2016-05-10680-125205-7ND
2016-05-10680-125205-8ND
2016-05-10680-125205-9ND
2016-05-10680-125205-10ND
2016-05-10680-125205-7ND
2016-05-10680-125205-8ND
2016-05-10680-125205-9ND
2016-08-09680-128606-1ND
2016-08-09680-128606-2ND
2016-08-09680-128606-3ND
2016-08-09680-128606-4ND
2016-08-09680-128606-1ND
2016-08-09680-128606-2ND
2016-08-09680-128606-3ND
2016-08-09680-128606-4ND
2016-11-08680-131950-10ND
2016-11-08680-131950-11ND
2016-11-08680-131950-12ND
2016-11-08680-131950-9ND
2016-11-08680-131950-10ND
2016-11-08680-131950-11ND
2016-11-08680-131950-12ND
2016-11-08680-131950-9ND
2017-02-0935294583021ND
2017-02-0935294583022ND
2017-02-0935294583023ND
2017-02-0935294583024ND
2017-02-0935294583021ND
2017-02-0935294583022ND
2017-02-0935294583023ND
2017-02-0935294583024ND
2017-05-05353107630161.80 ppb
2017-05-05353107630171.90 ppb
2017-05-0535310763018ND
2017-05-0535310763019ND
2017-05-05353107630161.80 ppb
2017-05-05353107630171.90 ppb
2017-05-0535310763018ND
2017-05-0535310763019ND
2017-09-2635338855021ND
2017-09-2635338855022ND
2017-09-2635338855023ND
2017-09-2635338855024ND
2017-09-2635338855021ND
2017-09-2635338855022ND
2017-09-2635338855023ND
2017-09-2635338855024ND
2017-11-03353461900011.10 ppb
2017-11-03353461900021.20 ppb
2017-11-03353461900030.460 ppb
2017-11-03353461900040.610 ppb
2017-11-03353461900011.10 ppb
2017-11-03353461900021.20 ppb
2017-11-03353461900030.460 ppb
2017-11-03353461900040.610 ppb
2018-02-0235371894001ND
2018-02-0235371894002ND
2018-02-0235371894003ND
2018-02-0235371894004ND
2018-02-0235371894001ND
2018-02-0235371894002ND
2018-02-0235371894003ND
2018-02-0235371894004ND
2018-05-2935394932001ND
2018-05-29353949320020.990 ppb
2018-05-2935394932003ND
2018-05-2935394932004ND
2018-05-2935394932001ND
2018-05-29353949320020.990 ppb
2018-05-2935394932003ND
2018-05-2935394932004ND
2018-08-2735414265001ND
2018-08-27354142650021.10 ppb
2018-08-2735414265003ND
2018-08-2735414265004ND
2018-08-2735414265001ND
2018-08-27354142650021.10 ppb
2018-08-2735414265003ND
2018-08-2735414265004ND
2018-11-1535432059001ND
2018-11-1535432059002ND
2018-11-1535432059003ND
2018-11-1535432059004ND
2018-11-1535432059001ND
2018-11-1535432059002ND
2018-11-1535432059003ND
2018-11-1535432059004ND
2019-02-1435449051001ND
2019-02-1435449051002ND
2019-02-1435449051003ND
2019-02-1435449051004ND
2019-02-1435449051001ND
2019-02-1435449051002ND
2019-02-1435449051003ND
2019-02-1435449051004ND
2019-05-1535469471001ND
2019-05-1535469471002ND
2019-05-1535469471003ND
2019-05-1535469471004ND
2019-05-1535469471001ND
2019-05-1535469471002ND
2019-05-1535469471003ND
2019-05-1535469471004ND
2019-08-0135487151001ND
2019-08-01354871510022.30 ppb
2019-08-0135487151003ND
2019-08-0135487151004ND
2019-08-0135487151001ND
2019-08-01354871510022.30 ppb
2019-08-0135487151003ND
2019-08-0135487151004ND
2019-11-0735511085001ND
2019-11-0735511085002ND
2019-11-0735511085003ND
2019-11-0735511085004ND
2019-11-0735511085001ND
2019-11-0735511085002ND
2019-11-0735511085003ND
2019-11-0735511085004ND