Know Your Environment. Protect Your Health.

Monochloroacetic acid

City of Lancaster

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.

 

264

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.36 ppb2310ND - 4.80 ppb
20191.70 ppb3317ND - 5.20 ppb
2020ND400ND
20210.0509 ppb451ND - 2.29 ppb
20220.227 ppb605ND - 3.50 ppb
2023ND630ND

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
2018-02-068002953-02ND
2018-02-068002953-05ND
2018-02-068002953-06ND
2018-02-068002953-07ND
2018-02-088002953-01ND
2018-02-088002953-03ND
2018-02-088002953-04ND
2018-02-088002953-08ND
2018-09-2523410350024.80 ppb
2018-11-072349167001ND
2018-11-0723491670033.90 ppb
2018-11-0723491670043.20 ppb
2018-11-072349167005ND
2018-11-0823491670022.30 ppb
2018-11-0823491670062.50 ppb
2018-11-0823491670072.90 ppb
2018-11-0823491670083.70 ppb
2018-12-123006044001ND
2018-12-1230060440023.10 ppb
2018-12-1230060440032.30 ppb
2018-12-123006044005ND
2018-12-1230060440062.50 ppb
2018-12-133006044007ND
2019-02-0630155560022.50 ppb
2019-02-0630155560042.50 ppb
2019-02-063015556005ND
2019-02-0630155560062.60 ppb
2019-02-0630155560073.30 ppb
2019-02-0730155560013.60 ppb
2019-02-0730155560032.80 ppb
2019-02-0730155560082.90 ppb
2019-05-063032689001ND
2019-05-0630326890024.10 ppb
2019-05-0630326890044.30 ppb
2019-05-0630326890055.00 ppb
2019-05-0730326890035.20 ppb
2019-05-0730326890065.00 ppb
2019-05-0730326890074.00 ppb
2019-05-073032689008ND
2019-08-063050286002ND
2019-08-063050286003ND
2019-08-063050286004ND
2019-08-063050286006ND
2019-08-073050286001ND
2019-08-073050286005ND
2019-08-073050286007ND
2019-08-073050286008ND
2019-11-073068920001ND
2019-11-073068920002ND
2019-11-073068920003ND
2019-11-073068920004ND
2019-11-0730689200052.10 ppb
2019-11-0830699980012.00 ppb
2019-11-083069998002ND
2019-11-0830699980032.10 ppb
2019-12-1830766130012.10 ppb
2020-02-10ND
2020-02-10ND
2020-02-10ND
2020-02-10ND
2020-02-10ND
2020-02-11ND
2020-02-11ND
2020-02-11ND
2020-05-06ND
2020-05-06ND
2020-05-06ND
2020-05-06ND
2020-05-07ND
2020-05-07ND
2020-05-07ND
2020-05-07ND
2020-08-10ND
2020-08-10ND
2020-08-10ND
2020-08-11ND
2020-08-11ND
2020-08-11ND
2020-08-11ND
2020-08-11ND
2020-09-26ND
2020-09-29ND
2020-09-29ND
2020-09-29ND
2020-09-29ND
2020-09-30ND
2020-11-09ND
2020-11-09ND
2020-11-09ND
2020-11-09ND
2020-11-09ND
2020-11-10ND
2020-11-10ND
2020-12-15ND
2020-12-15ND
2020-12-15ND
2021-02-08ND
2021-02-08ND
2021-02-08ND
2021-02-08ND
2021-02-09ND
2021-02-09ND
2021-02-09ND
2021-02-09ND
2021-05-10ND
2021-05-102.29 ppb
2021-05-10ND
2021-05-10ND
2021-05-11ND
2021-05-11ND
2021-05-11ND
2021-05-11ND
2021-08-09ND
2021-08-09ND
2021-08-09ND
2021-08-09ND
2021-08-10ND
2021-08-10ND
2021-08-10ND
2021-08-10ND
2021-09-15ND
2021-09-22ND
2021-09-28ND
2021-09-28ND
2021-11-08ND
2021-11-09ND
2021-11-09ND
2021-11-09ND
2021-11-09ND
2021-11-09ND
2021-11-10ND
2021-11-10ND
2021-12-10ND
2021-12-13ND
2021-12-14ND
2021-12-14ND
2021-12-14ND
2021-12-15ND
2021-12-15ND
2021-12-15ND
2021-12-15ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-02-08ND
2022-03-08ND
2022-03-08ND
2022-03-09ND
2022-03-09ND
2022-03-09ND
2022-03-10ND
2022-03-10ND
2022-03-10ND
2022-03-15ND
2022-04-052.50 ppb
2022-04-052.80 ppb
2022-04-05ND
2022-04-052.20 ppb
2022-04-053.50 ppb
2022-04-05ND
2022-04-05ND
2022-04-062.60 ppb
2022-05-06ND
2022-05-06ND
2022-05-06ND
2022-05-06ND
2022-05-06ND
2022-05-06ND
2022-05-06ND
2022-05-09ND
2022-08-08ND
2022-08-08ND
2022-08-08ND
2022-08-08ND
2022-08-09ND
2022-08-09ND
2022-08-09ND
2022-08-09ND
2022-09-29ND
2022-11-09ND
2022-11-09ND
2022-11-09ND
2022-11-09ND
2022-11-09ND
2022-11-09ND
2022-11-09ND
2022-11-09ND
2022-12-22ND
2022-12-22ND
2022-12-22ND
2022-12-22ND
2022-12-22ND
2022-12-22ND
2022-12-23ND
2022-12-23ND
2022-12-29ND
2022-12-29ND
2023-02-06ND
2023-02-06ND
2023-02-06ND
2023-02-06ND
2023-02-07ND
2023-02-07ND
2023-02-07ND
2023-02-07ND
2023-04-06ND
2023-04-06ND
2023-04-06ND
2023-04-06ND
2023-04-06ND
2023-04-06ND
2023-04-06ND
2023-04-06ND
2023-05-09ND
2023-05-09ND
2023-05-09ND
2023-05-09ND
2023-05-10ND
2023-05-10ND
2023-05-10ND
2023-05-10ND
2023-05-30ND
2023-05-30ND
2023-05-30ND
2023-05-30ND
2023-05-30ND
2023-05-30ND
2023-08-08ND
2023-08-08ND
2023-08-08ND
2023-08-08ND
2023-08-08ND
2023-08-10ND
2023-08-10ND
2023-08-10ND
2023-09-22ND
2023-09-22ND
2023-09-22ND
2023-09-22ND
2023-09-25ND
2023-09-25ND
2023-09-25ND
2023-09-25ND
2023-11-08ND
2023-11-08ND
2023-11-08ND
2023-11-08ND
2023-11-08ND
2023-11-09ND
2023-11-09ND
2023-11-09ND
2023-12-06ND
2023-12-06ND
2023-12-06ND
2023-12-06ND
2023-12-06ND
2023-12-07ND
2023-12-07ND
2023-12-07ND
2023-12-28ND