Know Your Environment. Protect Your Health.

Dichloroacetic acid

Zachary Water System

Dichloroacetic 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.

 

128

Samples

0

Samples exceeding legal limit (MCL)

115

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.65 ppb3224ND - 3.60 ppb
20191.89 ppb32320.780 ppb - 4.10 ppb
20201.78 ppb16161.10 ppb - 3.50 ppb
20212.19 ppb16161.000 ppb - 7.40 ppb
20221.95 ppb1615ND - 4.60 ppb
20231.59 ppb1612ND - 3.80 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-01353719060010.920 ppb
2018-02-01353719060023.50 ppb
2018-02-0135371906003ND
2018-02-01353719060041.60 ppb
2018-02-01353719060010.920 ppb
2018-02-01353719060023.50 ppb
2018-02-0135371906003ND
2018-02-01353719060041.60 ppb
2018-05-04353903350012.50 ppb
2018-05-04353903350023.60 ppb
2018-05-04353903350032.10 ppb
2018-05-04353903350042.10 ppb
2018-05-04353903350012.50 ppb
2018-05-04353903350023.60 ppb
2018-05-04353903350032.10 ppb
2018-05-04353903350042.10 ppb
2018-08-1735412007001ND
2018-08-17354120070022.80 ppb
2018-08-1735412007003ND
2018-08-1735412007004ND
2018-08-1735412007001ND
2018-08-17354120070022.80 ppb
2018-08-1735412007003ND
2018-08-1735412007004ND
2018-11-02354282050011.40 ppb
2018-11-02354282050022.40 ppb
2018-11-02354282050031.20 ppb
2018-11-02354282050042.30 ppb
2018-11-02354282050011.40 ppb
2018-11-02354282050022.40 ppb
2018-11-02354282050031.20 ppb
2018-11-02354282050042.30 ppb
2019-02-01354457550013.50 ppb
2019-02-01354457550024.10 ppb
2019-02-01354457550031.60 ppb
2019-02-01354457550042.80 ppb
2019-02-01354457550013.50 ppb
2019-02-01354457550024.10 ppb
2019-02-01354457550031.60 ppb
2019-02-01354457550042.80 ppb
2019-05-01354654080011.000 ppb
2019-05-01354654080022.80 ppb
2019-05-01354654080030.940 ppb
2019-05-01354654080041.10 ppb
2019-05-01354654080011.000 ppb
2019-05-01354654080022.80 ppb
2019-05-01354654080030.940 ppb
2019-05-01354654080041.10 ppb
2019-08-19354939800011.30 ppb
2019-08-19354939800022.30 ppb
2019-08-19354939800030.780 ppb
2019-08-19354939800041.40 ppb
2019-08-19354939800011.30 ppb
2019-08-19354939800022.30 ppb
2019-08-19354939800030.780 ppb
2019-08-19354939800041.40 ppb
2019-11-05355108750011.20 ppb
2019-11-05355108750022.40 ppb
2019-11-05355108750031.20 ppb
2019-11-05355108750041.80 ppb
2019-11-05355108750011.20 ppb
2019-11-05355108750022.40 ppb
2019-11-05355108750031.20 ppb
2019-11-05355108750041.80 ppb
2020-02-03355293490011.40 ppb
2020-02-03355293490022.00 ppb
2020-02-03355293490031.10 ppb
2020-02-03355293490041.60 ppb
2020-05-04355480190011.60 ppb
2020-05-04355480190022.20 ppb
2020-05-04355480190031.30 ppb
2020-05-04355480190041.80 ppb
2020-08-03355680150011.30 ppb
2020-08-03355680150022.10 ppb
2020-08-03355680150032.10 ppb
2020-08-03355680150041.60 ppb
2020-11-04355905280011.70 ppb
2020-11-04355905280023.50 ppb
2020-11-04355905280031.10 ppb
2020-11-04355905280042.10 ppb
2021-02-01356100660011.40 ppb
2021-02-01356100660021.60 ppb
2021-02-01356100660037.40 ppb
2021-02-01356100660041.70 ppb
2021-05-03356316890011.10 ppb
2021-05-03356316890022.00 ppb
2021-05-03356316890031.000 ppb
2021-05-03356316890041.50 ppb
2021-08-02356543060013.10 ppb
2021-08-02356543060022.40 ppb
2021-08-02356543060033.10 ppb
2021-08-02356543060041.50 ppb
2021-11-02356766420011.000 ppb
2021-11-02356766420022.40 ppb
2021-11-02356766420032.40 ppb
2021-11-02356766420041.50 ppb
2022-02-02356966770010.820 ppb
2022-02-02356966770021.50 ppb
2022-02-02356966770031.50 ppb
2022-02-02356966770041.90 ppb
2022-05-02357154310012.30 ppb
2022-05-02357154310024.20 ppb
2022-05-02357154310032.10 ppb
2022-05-02357154310042.10 ppb
2022-08-01357369730014.60 ppb
2022-08-01357369730022.20 ppb
2022-08-0135736973003ND
2022-08-01357369730041.10 ppb
2022-11-01357581470011.000 ppb
2022-11-01357581470022.80 ppb
2022-11-01357581470031.20 ppb
2022-11-01357581470041.90 ppb
2023-02-06357781730011.10 ppb
2023-02-0635778173002ND
2023-02-0635778173003ND
2023-02-0635778173004ND
2023-05-08357989880011.90 ppb
2023-05-08357989880023.10 ppb
2023-05-0835798988003ND
2023-05-08357989880041.90 ppb
2023-08-01358177240012.60 ppb
2023-08-01358177240023.40 ppb
2023-08-01358177240031.20 ppb
2023-08-01358177240041.90 ppb
2023-11-06358405320011.60 ppb
2023-11-06358405320023.80 ppb
2023-11-06358405320031.10 ppb
2023-11-06358405320041.80 ppb