Know Your Environment. Protect Your Health.

Monochloroacetic acid

St Charles Water District 1 East Bank

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.

 

224

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.91 ppb3218ND - 10.00 ppb
20191.87 ppb6452ND - 4.50 ppb
20201.38 ppb3226ND - 3.20 ppb
20210.660 ppb3217ND - 1.60 ppb
20221.67 ppb3228ND - 3.88 ppb
20231.61 ppb3230ND - 4.00 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic 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.a public health goal. This health guideline protects against change to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-1335380152001ND
2018-03-1335380152002ND
2018-03-1335380152003ND
2018-03-1335380152004ND
2018-03-1335380152001ND
2018-03-1335380152002ND
2018-03-1335380152003ND
2018-03-1335380152004ND
2018-06-12353981210013.30 ppb
2018-06-12353981210022.50 ppb
2018-06-12353981210032.60 ppb
2018-06-12353981210042.80 ppb
2018-06-12353981210013.30 ppb
2018-06-12353981210022.50 ppb
2018-06-12353981210032.60 ppb
2018-06-12353981210042.80 ppb
2018-09-20354194600019.10 ppb
2018-09-20354194600029.40 ppb
2018-09-203541946000310.00 ppb
2018-09-20354194600045.50 ppb
2018-09-20354194600019.10 ppb
2018-09-20354194600029.40 ppb
2018-09-203541946000310.00 ppb
2018-09-20354194600045.50 ppb
2018-12-1335437252001ND
2018-12-1335437252002ND
2018-12-1335437252003ND
2018-12-13354372520041.30 ppb
2018-12-1335437252001ND
2018-12-1335437252002ND
2018-12-1335437252003ND
2018-12-13354372520041.30 ppb
2019-03-1435454705001ND
2019-03-1435454705002ND
2019-03-1435454705003ND
2019-03-14354547050041.90 ppb
2019-03-1435454705001ND
2019-03-1435454705002ND
2019-03-1435454705003ND
2019-03-14354547050041.90 ppb
2019-06-12354756930012.20 ppb
2019-06-12354756930022.30 ppb
2019-06-12354756930033.70 ppb
2019-06-12354756930042.20 ppb
2019-06-12354756930012.20 ppb
2019-06-12354756930022.30 ppb
2019-06-12354756930033.70 ppb
2019-06-12354756930042.20 ppb
2019-09-05354952030014.10 ppb
2019-09-05354952030023.80 ppb
2019-09-05354952030034.20 ppb
2019-09-05354952030044.50 ppb
2019-09-05354952030053.60 ppb
2019-09-05354952030062.60 ppb
2019-09-05354952030073.70 ppb
2019-09-05354952030082.80 ppb
2019-09-05354952030014.10 ppb
2019-09-05354952030023.80 ppb
2019-09-05354952030034.20 ppb
2019-09-05354952030044.50 ppb
2019-09-05354952030053.60 ppb
2019-09-05354952030062.60 ppb
2019-09-05354952030073.70 ppb
2019-09-05354952030082.80 ppb
2019-10-10355044230011.70 ppb
2019-10-10355044230021.80 ppb
2019-10-10355044230031.70 ppb
2019-10-10355044230041.50 ppb
2019-10-10355044230051.40 ppb
2019-10-10355044230061.20 ppb
2019-10-10355044230071.50 ppb
2019-10-10355044230081.30 ppb
2019-10-10355044230011.70 ppb
2019-10-10355044230021.80 ppb
2019-10-10355044230031.70 ppb
2019-10-10355044230041.50 ppb
2019-10-10355044230051.40 ppb
2019-10-10355044230061.20 ppb
2019-10-10355044230071.50 ppb
2019-10-10355044230081.30 ppb
2019-12-10355181260011.40 ppb
2019-12-10355181260021.40 ppb
2019-12-10355181260031.30 ppb
2019-12-1035518126004ND
2019-12-1035518126005ND
2019-12-10355181260060.940 ppb
2019-12-1035518126007ND
2019-12-10355181260081.20 ppb
2019-12-10355181260011.40 ppb
2019-12-10355181260021.40 ppb
2019-12-10355181260031.30 ppb
2019-12-1035518126004ND
2019-12-1035518126005ND
2019-12-10355181260060.940 ppb
2019-12-1035518126007ND
2019-12-10355181260081.20 ppb
2020-03-0535535524001ND
2020-03-0535535524002ND
2020-03-0535535524003ND
2020-03-0535535524004ND
2020-03-0535535524005ND
2020-03-0535535524006ND
2020-03-05355355240071.000 ppb
2020-03-05355355240081.40 ppb
2020-06-18355577730011.70 ppb
2020-06-18355577730021.80 ppb
2020-06-18355577730032.20 ppb
2020-06-18355577730041.70 ppb
2020-06-18355577730051.70 ppb
2020-06-18355577730062.00 ppb
2020-06-18355577730072.00 ppb
2020-06-18355577730081.30 ppb
2020-09-18355790100011.50 ppb
2020-09-18355790100021.40 ppb
2020-09-18355790100031.60 ppb
2020-09-18355790100043.10 ppb
2020-09-18355790100052.60 ppb
2020-09-18355790100063.20 ppb
2020-09-18355790100071.70 ppb
2020-09-18355790100081.70 ppb
2020-12-11355985460011.70 ppb
2020-12-11355985460021.70 ppb
2020-12-11355985460031.30 ppb
2020-12-11355985460041.000 ppb
2020-12-11355985460051.40 ppb
2020-12-11355985460061.20 ppb
2020-12-11355985460071.000 ppb
2020-12-11355985460081.30 ppb
2021-03-11356186770011.40 ppb
2021-03-11356186770021.20 ppb
2021-03-11356186770031.10 ppb
2021-03-11356186770040.920 ppb
2021-03-11356186770051.20 ppb
2021-03-1135618677006ND
2021-03-1135618677007ND
2021-03-11356186770081.30 ppb
2021-06-0935639743001ND
2021-06-0935639743002ND
2021-06-0935639743003ND
2021-06-0935639743004ND
2021-06-0935639743005ND
2021-06-0935639743006ND
2021-06-0935639743007ND
2021-06-0935639743008ND
2021-09-22356660650011.10 ppb
2021-09-22356660650021.40 ppb
2021-09-22356660650031.40 ppb
2021-09-22356660650041.30 ppb
2021-09-22356660650051.40 ppb
2021-09-22356660650061.60 ppb
2021-09-22356660650071.30 ppb
2021-09-22356660650081.50 ppb
2021-12-21356859490011.10 ppb
2021-12-21356859490021.000 ppb
2021-12-21356859490030.910 ppb
2021-12-2135685949004ND
2021-12-2135685949005ND
2021-12-2135685949006ND
2021-12-2135685949007ND
2021-12-2135685949008ND
2022-03-02357015600011.80 ppb
2022-03-02357015600021.60 ppb
2022-03-02357015600031.10 ppb
2022-03-02357015600041.10 ppb
2022-03-02357015600051.20 ppb
2022-03-02357015600061.10 ppb
2022-03-02357015600070.990 ppb
2022-03-02357015600081.40 ppb
2022-06-09B2202697-0013.86 ppb
2022-06-09B2202697-0023.18 ppb
2022-06-09B2202697-0032.74 ppb
2022-06-09B2202697-0043.48 ppb
2022-06-09B2202697-0053.35 ppb
2022-06-09B2202697-0063.72 ppb
2022-06-09B2202697-0073.19 ppb
2022-06-09B2202697-0083.88 ppb
2022-09-15357472180011.40 ppb
2022-09-15357472180021.50 ppb
2022-09-15357472180031.40 ppb
2022-09-15357472180041.30 ppb
2022-09-15357472180051.20 ppb
2022-09-15357472180061.90 ppb
2022-09-15357472180071.40 ppb
2022-09-15357472180081.30 ppb
2022-12-15357672030011.40 ppb
2022-12-15357672030021.20 ppb
2022-12-15357672030030.960 ppb
2022-12-1535767203004ND
2022-12-1535767203005ND
2022-12-1535767203006ND
2022-12-1535767203007ND
2022-12-15357672030080.910 ppb
2023-03-14357859000011.30 ppb
2023-03-14357859000021.20 ppb
2023-03-14357859000031.20 ppb
2023-03-14357859000041.10 ppb
2023-03-14357859000051.10 ppb
2023-03-14357859000061.10 ppb
2023-03-14357859000071.10 ppb
2023-03-14357859000081.10 ppb
2023-06-09358055530012.10 ppb
2023-06-09358055530021.70 ppb
2023-06-09358055530033.40 ppb
2023-06-09358055530044.00 ppb
2023-06-09358055530053.60 ppb
2023-06-09358055530063.40 ppb
2023-06-09358055530073.50 ppb
2023-06-09358055530081.40 ppb
2023-09-06358261170011.30 ppb
2023-09-06358261170021.20 ppb
2023-09-06358261170031.10 ppb
2023-09-06358261170041.40 ppb
2023-09-06358261170051.40 ppb
2023-09-06358261170061.30 ppb
2023-09-06358261170071.30 ppb
2023-09-06358261170081.40 ppb
2023-12-19358493650011.60 ppb
2023-12-19358493650021.70 ppb
2023-12-19358493650031.20 ppb
2023-12-1935849365004ND
2023-12-19358493650061.40 ppb
2023-12-19358493650071.70 ppb
2023-12-19358493650081.20 ppb
2023-12-1935849991001ND