Monochloroacetic acid
Watertown Water & Sewer Authority
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.
96
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.863 ppb | 16 | 13 | ND - 1.30 ppb |
| 2019 | 0.913 ppb | 16 | 15 | ND - 1.50 ppb |
| 2020 | 1.19 ppb | 16 | 15 | ND - 1.60 ppb |
| 2021 | 1.31 ppb | 16 | 16 | 0.500 ppb - 2.40 ppb |
| 2022 | 1.43 ppb | 16 | 15 | ND - 2.14 ppb |
| 2023 | 2.14 ppb | 16 | 16 | 0.790 ppb - 7.72 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 |
|---|---|---|
| 2018-03-07 | DBP 200489534 | 1.10 ppb |
| 2018-03-07 | DBP 200489535 | 1.30 ppb |
| 2018-03-07 | DBP 200489536 | 1.30 ppb |
| 2018-03-07 | DBP 200489533 | 0.900 ppb |
| 2018-06-06 | DBP 200496328 | 0.900 ppb |
| 2018-06-06 | DBP 200496329 | 1.20 ppb |
| 2018-06-06 | DBP 200496330 | 1.30 ppb |
| 2018-06-06 | DBP 200496331 | 1.20 ppb |
| 2018-09-05 | DBP 200504061 | ND |
| 2018-09-05 | DBP 200504062 | 0.500 ppb |
| 2018-09-05 | DBP 200504063 | ND |
| 2018-09-05 | DBP 200504064 | 1.10 ppb |
| 2018-12-05 | DBP 200514980 | ND |
| 2018-12-05 | DBP 200514982 | 1.10 ppb |
| 2018-12-05 | DBP 200514981 | 1.10 ppb |
| 2018-12-05 | DBP 200514978 | 0.800 ppb |
| 2019-03-06 | DBP 200523708 | 1.20 ppb |
| 2019-03-06 | DBP 200523709 | 0.600 ppb |
| 2019-03-06 | DBP 200523710 | 0.900 ppb |
| 2019-03-06 | DBP 200523711 | 0.600 ppb |
| 2019-06-05 | DBP 200535068 | 1.10 ppb |
| 2019-06-05 | DBP 200535069 | 1.20 ppb |
| 2019-06-05 | DBP 200535070 | 0.900 ppb |
| 2019-06-05 | DBP 200535071 | 1.10 ppb |
| 2019-09-05 | DBP 200547637 | 1.50 ppb |
| 2019-09-05 | DBP 200547640 | 1.40 ppb |
| 2019-09-05 | DBP 200547639 | 1.30 ppb |
| 2019-09-05 | DBP 200547636 | 0.700 ppb |
| 2019-12-05 | DBP 200559147 | 0.500 ppb |
| 2019-12-05 | DBP 200559148 | 1.000 ppb |
| 2019-12-05 | DBP 200559149 | 0.600 ppb |
| 2019-12-05 | DBP 200559146 | ND |
| 2020-03-04 | DBP 200568197 | 0.800 ppb |
| 2020-03-04 | DBP 200568198 | 0.700 ppb |
| 2020-03-04 | DBP 200568199 | 0.600 ppb |
| 2020-03-04 | DBP 200568200 | 0.600 ppb |
| 2020-06-03 | DBP 200577855 | 1.50 ppb |
| 2020-06-03 | DBP 200577856 | 1.40 ppb |
| 2020-06-03 | DBP 200577854 | 1.40 ppb |
| 2020-06-03 | DBP 200577853 | 1.50 ppb |
| 2020-09-02 | DBP 200588679 | ND |
| 2020-09-02 | DBP 200588680 | 1.50 ppb |
| 2020-09-02 | DBP 200588681 | 1.40 ppb |
| 2020-09-02 | DBP 200588682 | 1.50 ppb |
| 2020-12-02 | DBP 200599791 | 1.60 ppb |
| 2020-12-02 | DBP 200599792 | 1.30 ppb |
| 2020-12-02 | DBP 200599793 | 1.60 ppb |
| 2020-12-02 | DBP 200599794 | 1.60 ppb |
| 2021-03-10 | DBP 200609349 | 0.900 ppb |
| 2021-03-10 | DBP 200609346 | 1.10 ppb |
| 2021-03-10 | DBP 200609347 | 0.800 ppb |
| 2021-03-10 | DBP 200609348 | 0.900 ppb |
| 2021-06-02 | DBP 200619137 | 0.900 ppb |
| 2021-06-02 | DBP 200619139 | 1.10 ppb |
| 2021-06-02 | DBP 200619140 | 1.30 ppb |
| 2021-06-02 | DBP 200619136 | 1.70 ppb |
| 2021-09-08 | 300053894 300053895 | 0.530 ppb |
| 2021-09-08 | 300053900 300053901 | 0.500 ppb |
| 2021-09-08 | 300053903 300053904 | 1.12 ppb |
| 2021-09-22 | 300065698 300065699 | 1.36 ppb |
| 2021-12-01 | D300110687 300110688 | 2.40 ppb |
| 2021-12-01 | D300110684 300110685 | 2.30 ppb |
| 2021-12-01 | D300110681 300110682 | 1.90 ppb |
| 2021-12-01 | D300110678 300110679 | 2.10 ppb |
| 2022-03-02 | D300151783 300151784 | 0.650 ppb |
| 2022-03-02 | D300151786 300151787 | 0.990 ppb |
| 2022-03-02 | D300151789 300151790 | 0.530 ppb |
| 2022-03-02 | D300151792 300151793 | ND |
| 2022-06-01 | D300192098 300192099 | 1.77 ppb |
| 2022-06-01 | D300192101 300192102 | 1.62 ppb |
| 2022-06-01 | D300192104 300192105 | 1.61 ppb |
| 2022-06-01 | D300192107 300192108 | 1.74 ppb |
| 2022-09-14 | D300244033 300244034 | 1.94 ppb |
| 2022-09-14 | D300244027 300244028 | 1.02 ppb |
| 2022-09-14 | D300244024 300244025 | 1.01 ppb |
| 2022-09-14 | D300244030 300244031 | 2.13 ppb |
| 2022-12-07 | D300282718 300282719 | 1.86 ppb |
| 2022-12-07 | D300282721 300282722 | 2.14 ppb |
| 2022-12-07 | D300282724 300282725 | 1.93 ppb |
| 2022-12-07 | D300282727 300282728 | 1.99 ppb |
| 2023-03-16 | D300321892 300321893 | 1.06 ppb |
| 2023-03-16 | D300321895 300321896 | 1.000 ppb |
| 2023-03-16 | D300321898 300321899 | 1.32 ppb |
| 2023-03-16 | D300321901 300321902 | 1.01 ppb |
| 2023-06-14 | D300365450 300365451 | 1.28 ppb |
| 2023-06-14 | D300365456 300365457 | 1.53 ppb |
| 2023-06-14 | D300365453 300365454 | 1.53 ppb |
| 2023-06-14 | D300365447 300365448 | 1.50 ppb |
| 2023-09-06 | D300410877 300410878 | 4.54 ppb |
| 2023-09-06 | D300410880 300410881 | 3.40 ppb |
| 2023-09-06 | D300410883 300410884 | 7.72 ppb |
| 2023-09-06 | D300410886 300410887 | 4.50 ppb |
| 2023-12-07 | D300456855 300456856 | 0.790 ppb |
| 2023-12-07 | D300456858 300456859 | 0.850 ppb |
| 2023-12-07 | D300456861 300456862 | 1.08 ppb |
| 2023-12-07 | D300456864 300456865 | 1.07 ppb |