Monochloroacetic acid
Monroe 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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.453 ppb | 64 | 14 | ND - 2.50 ppb |
| 2019 | 4.29 ppb | 82 | 66 | ND - 13.7 ppb |
| 2020 | 1.69 ppb | 32 | 24 | ND - 3.10 ppb |
| 2021 | 2.43 ppb | 32 | 32 | 1.20 ppb - 3.90 ppb |
| 2022 | 2.35 ppb | 38 | 31 | ND - 5.00 ppb |
| 2023 | 1.60 ppb | 32 | 20 | ND - 4.20 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 |
|---|---|---|
| 2018-02-09 | 35374042001 | ND |
| 2018-02-09 | 35374042002 | ND |
| 2018-02-09 | 35374042003 | ND |
| 2018-02-09 | 35374042004 | ND |
| 2018-02-09 | 35374042005 | ND |
| 2018-02-09 | 35374042006 | ND |
| 2018-02-09 | 35374042007 | ND |
| 2018-02-09 | 35374042008 | ND |
| 2018-02-09 | 35374042001 | ND |
| 2018-02-09 | 35374042002 | ND |
| 2018-02-09 | 35374042003 | ND |
| 2018-02-09 | 35374042004 | ND |
| 2018-02-09 | 35374042005 | ND |
| 2018-02-09 | 35374042006 | ND |
| 2018-02-09 | 35374042007 | ND |
| 2018-02-09 | 35374042008 | ND |
| 2018-05-11 | 35391887001 | ND |
| 2018-05-11 | 35391887002 | ND |
| 2018-05-11 | 35391887003 | ND |
| 2018-05-11 | 35391887004 | ND |
| 2018-05-11 | 35391887005 | ND |
| 2018-05-11 | 35391887006 | ND |
| 2018-05-11 | 35391887007 | ND |
| 2018-05-11 | 35391887008 | ND |
| 2018-05-11 | 35391887001 | ND |
| 2018-05-11 | 35391887002 | ND |
| 2018-05-11 | 35391887003 | ND |
| 2018-05-11 | 35391887004 | ND |
| 2018-05-11 | 35391887005 | ND |
| 2018-05-11 | 35391887006 | ND |
| 2018-05-11 | 35391887007 | ND |
| 2018-05-11 | 35391887008 | ND |
| 2018-08-08 | 35410403001 | ND |
| 2018-08-08 | 35410403002 | ND |
| 2018-08-08 | 35410403003 | ND |
| 2018-08-08 | 35410403004 | ND |
| 2018-08-08 | 35410403005 | ND |
| 2018-08-08 | 35410403006 | ND |
| 2018-08-08 | 35410403007 | ND |
| 2018-08-08 | 35410403008 | 2.20 ppb |
| 2018-08-08 | 35410403001 | ND |
| 2018-08-08 | 35410403002 | ND |
| 2018-08-08 | 35410403003 | ND |
| 2018-08-08 | 35410403004 | ND |
| 2018-08-08 | 35410403005 | ND |
| 2018-08-08 | 35410403006 | ND |
| 2018-08-08 | 35410403007 | ND |
| 2018-08-08 | 35410403008 | 2.20 ppb |
| 2018-11-05 | 35429700001 | 2.30 ppb |
| 2018-11-05 | 35429700002 | 2.50 ppb |
| 2018-11-05 | 35429700003 | 2.10 ppb |
| 2018-11-05 | 35429700004 | 1.70 ppb |
| 2018-11-05 | 35429700005 | 1.80 ppb |
| 2018-11-05 | 35429700006 | 1.90 ppb |
| 2018-11-05 | 35429700007 | ND |
| 2018-11-05 | 35429700008 | ND |
| 2018-11-05 | 35429700001 | 2.30 ppb |
| 2018-11-05 | 35429700002 | 2.50 ppb |
| 2018-11-05 | 35429700003 | 2.10 ppb |
| 2018-11-05 | 35429700004 | 1.70 ppb |
| 2018-11-05 | 35429700005 | 1.80 ppb |
| 2018-11-05 | 35429700006 | 1.90 ppb |
| 2018-11-05 | 35429700007 | ND |
| 2018-11-05 | 35429700008 | ND |
| 2019-02-06 | 35446801001 | 12.8 ppb |
| 2019-02-06 | 35446801002 | 10.4 ppb |
| 2019-02-06 | 35446801003 | 13.0 ppb |
| 2019-02-06 | 35446801004 | 12.9 ppb |
| 2019-02-06 | 35446801005 | 11.1 ppb |
| 2019-02-06 | 35446801006 | 10.8 ppb |
| 2019-02-06 | 35446801007 | 9.20 ppb |
| 2019-02-06 | 35446801008 | 13.7 ppb |
| 2019-02-06 | 35446801001 | 12.8 ppb |
| 2019-02-06 | 35446801002 | 10.4 ppb |
| 2019-02-06 | 35446801003 | 13.0 ppb |
| 2019-02-06 | 35446801004 | 12.9 ppb |
| 2019-02-06 | 35446801005 | 11.1 ppb |
| 2019-02-06 | 35446801006 | 10.8 ppb |
| 2019-02-06 | 35446801007 | 9.20 ppb |
| 2019-02-06 | 35446801008 | 13.7 ppb |
| 2019-03-12 | 35454648001 | 3.60 ppb |
| 2019-03-12 | 35454648001 | 3.60 ppb |
| 2019-05-08 | 35467838001 | 5.90 ppb |
| 2019-05-08 | 35467838002 | 6.40 ppb |
| 2019-05-08 | 35467838003 | 5.50 ppb |
| 2019-05-08 | 35467838004 | 4.80 ppb |
| 2019-05-08 | 35467838005 | 3.70 ppb |
| 2019-05-08 | 35467838006 | 5.00 ppb |
| 2019-05-08 | 35467838007 | 5.50 ppb |
| 2019-05-08 | 35467838008 | 6.80 ppb |
| 2019-05-08 | 35467838001 | 5.90 ppb |
| 2019-05-08 | 35467838002 | 6.40 ppb |
| 2019-05-08 | 35467838003 | 5.50 ppb |
| 2019-05-08 | 35467838004 | 4.80 ppb |
| 2019-05-08 | 35467838005 | 3.70 ppb |
| 2019-05-08 | 35467838006 | 5.00 ppb |
| 2019-05-08 | 35467838007 | 5.50 ppb |
| 2019-05-08 | 35467838008 | 6.80 ppb |
| 2019-05-30 | 35472092001 | 3.10 ppb |
| 2019-05-30 | 35472092002 | 2.30 ppb |
| 2019-05-30 | 35472092003 | 2.90 ppb |
| 2019-05-30 | 35472092004 | 2.10 ppb |
| 2019-05-30 | 35472092001 | 3.10 ppb |
| 2019-05-30 | 35472092002 | 2.30 ppb |
| 2019-05-30 | 35472092003 | 2.90 ppb |
| 2019-05-30 | 35472092004 | 2.10 ppb |
| 2019-05-31 | 35472092005 | 2.40 ppb |
| 2019-05-31 | 35472092006 | 2.80 ppb |
| 2019-05-31 | 35472092007 | 2.20 ppb |
| 2019-05-31 | 35472092008 | 2.50 ppb |
| 2019-05-31 | 35472092005 | 2.40 ppb |
| 2019-05-31 | 35472092006 | 2.80 ppb |
| 2019-05-31 | 35472092007 | 2.20 ppb |
| 2019-05-31 | 35472092008 | 2.50 ppb |
| 2019-08-01 | 35487255001 | ND |
| 2019-08-01 | 35487255002 | ND |
| 2019-08-01 | 35487255003 | ND |
| 2019-08-01 | 35487255004 | ND |
| 2019-08-01 | 35487255005 | ND |
| 2019-08-01 | 35487255006 | ND |
| 2019-08-01 | 35487255007 | ND |
| 2019-08-01 | 35487255008 | ND |
| 2019-08-01 | 35487255001 | ND |
| 2019-08-01 | 35487255002 | ND |
| 2019-08-01 | 35487255003 | ND |
| 2019-08-01 | 35487255004 | ND |
| 2019-08-01 | 35487255005 | ND |
| 2019-08-01 | 35487255006 | ND |
| 2019-08-01 | 35487255007 | ND |
| 2019-08-01 | 35487255008 | ND |
| 2019-11-07 | 35510955001 | 2.00 ppb |
| 2019-11-07 | 35510955002 | 1.70 ppb |
| 2019-11-07 | 35510955003 | 2.00 ppb |
| 2019-11-07 | 35510955004 | 1.80 ppb |
| 2019-11-07 | 35510955005 | 1.90 ppb |
| 2019-11-07 | 35510955006 | 2.10 ppb |
| 2019-11-07 | 35510955007 | 1.40 ppb |
| 2019-11-07 | 35510955008 | 1.70 ppb |
| 2019-11-07 | 35510955001 | 2.00 ppb |
| 2019-11-07 | 35510955002 | 1.70 ppb |
| 2019-11-07 | 35510955003 | 2.00 ppb |
| 2019-11-07 | 35510955004 | 1.80 ppb |
| 2019-11-07 | 35510955005 | 1.90 ppb |
| 2019-11-07 | 35510955006 | 2.10 ppb |
| 2019-11-07 | 35510955007 | 1.40 ppb |
| 2019-11-07 | 35510955008 | 1.70 ppb |
| 2020-02-07 | 35529452001 | ND |
| 2020-02-07 | 35529452002 | ND |
| 2020-02-07 | 35529452003 | ND |
| 2020-02-07 | 35529452004 | ND |
| 2020-02-07 | 35529452005 | ND |
| 2020-02-07 | 35529452006 | ND |
| 2020-02-07 | 35529452007 | 2.70 ppb |
| 2020-02-07 | 35529452008 | ND |
| 2020-05-01 | 35547130001 | 1.70 ppb |
| 2020-05-01 | 35547130002 | 1.70 ppb |
| 2020-05-01 | 35547130003 | 2.00 ppb |
| 2020-05-01 | 35547130004 | 2.00 ppb |
| 2020-05-01 | 35547130005 | 1.70 ppb |
| 2020-05-01 | 35547130006 | 1.80 ppb |
| 2020-05-01 | 35547130007 | 1.70 ppb |
| 2020-05-01 | 35547130008 | 1.60 ppb |
| 2020-08-13 | 35570919001 | 2.90 ppb |
| 2020-08-13 | 35570919002 | 2.80 ppb |
| 2020-08-13 | 35570919003 | 2.90 ppb |
| 2020-08-13 | 35570919004 | 2.80 ppb |
| 2020-08-13 | 35570919005 | 2.60 ppb |
| 2020-08-13 | 35570919006 | 3.10 ppb |
| 2020-08-13 | 35570919007 | 2.90 ppb |
| 2020-08-13 | 35570919008 | ND |
| 2020-11-02 | 35589216001 | 2.40 ppb |
| 2020-11-02 | 35589216002 | 2.30 ppb |
| 2020-11-02 | 35589216003 | 2.40 ppb |
| 2020-11-02 | 35589216004 | 2.20 ppb |
| 2020-11-02 | 35589216005 | 2.30 ppb |
| 2020-11-02 | 35589216006 | 2.30 ppb |
| 2020-11-02 | 35589216007 | 2.30 ppb |
| 2020-11-02 | 35589216008 | 1.000 ppb |
| 2021-02-04 | 35609874001 | 1.80 ppb |
| 2021-02-04 | 35609874002 | 2.30 ppb |
| 2021-02-04 | 35609874003 | 2.20 ppb |
| 2021-02-04 | 35609874004 | 2.00 ppb |
| 2021-02-04 | 35609874005 | 2.00 ppb |
| 2021-02-04 | 35609874006 | 1.90 ppb |
| 2021-02-04 | 35609874007 | 2.20 ppb |
| 2021-02-04 | 35609874008 | 2.30 ppb |
| 2021-05-06 | 35631676001 | 3.30 ppb |
| 2021-05-06 | 35631676002 | 3.40 ppb |
| 2021-05-06 | 35631676003 | 3.20 ppb |
| 2021-05-06 | 35631676004 | 3.20 ppb |
| 2021-05-06 | 35631676005 | 3.20 ppb |
| 2021-05-06 | 35631676006 | 3.00 ppb |
| 2021-05-06 | 35631676007 | 2.40 ppb |
| 2021-05-06 | 35631676008 | 1.90 ppb |
| 2021-08-11 | 35655886001 | 3.40 ppb |
| 2021-08-11 | 35655886002 | 3.90 ppb |
| 2021-08-11 | 35655886003 | 3.80 ppb |
| 2021-08-11 | 35655886004 | 3.50 ppb |
| 2021-08-11 | 35655886005 | 3.80 ppb |
| 2021-08-11 | 35655886007 | 3.80 ppb |
| 2021-08-11 | 35655886008 | 1.30 ppb |
| 2021-09-27 | 35666235001 | 3.00 ppb |
| 2021-11-09 | 35676728001 | 1.30 ppb |
| 2021-11-09 | 35676728002 | 1.30 ppb |
| 2021-11-09 | 35676728003 | 1.40 ppb |
| 2021-11-09 | 35676728004 | 1.20 ppb |
| 2021-11-09 | 35676728005 | 1.50 ppb |
| 2021-11-09 | 35676728006 | 1.40 ppb |
| 2021-11-09 | 35676728007 | 1.50 ppb |
| 2021-11-09 | 35676728008 | 1.20 ppb |
| 2022-02-02 | 35695215001 | ND |
| 2022-02-02 | 35695215002 | ND |
| 2022-02-02 | 35695215003 | ND |
| 2022-02-02 | 35695215004 | ND |
| 2022-02-02 | 35695215005 | ND |
| 2022-02-02 | 35695215007 | 1.50 ppb |
| 2022-02-02 | 35695215008 | 1.20 ppb |
| 2022-02-03 | 35695215006 | 1.20 ppb |
| 2022-05-12 | 35718290001 | 2.70 ppb |
| 2022-05-12 | 35718290002 | 2.50 ppb |
| 2022-05-12 | 35718290003 | 2.80 ppb |
| 2022-05-12 | 35718290004 | 2.80 ppb |
| 2022-05-12 | 35718290005 | 3.00 ppb |
| 2022-05-12 | 35718290006 | 2.60 ppb |
| 2022-05-12 | 35718290007 | 3.00 ppb |
| 2022-05-12 | 35718290008 | 3.10 ppb |
| 2022-08-04 | 35737488001 | 3.20 ppb |
| 2022-08-04 | 35737488002 | 3.30 ppb |
| 2022-08-04 | 35737488003 | 4.40 ppb |
| 2022-08-04 | 35737488004 | 4.40 ppb |
| 2022-08-04 | 35737488005 | 4.90 ppb |
| 2022-08-04 | 35737488006 | 3.90 ppb |
| 2022-08-04 | 35737488007 | 5.00 ppb |
| 2022-08-04 | 35737488008 | 3.00 ppb |
| 2022-08-30 | 35744026001 | 3.60 ppb |
| 2022-08-30 | 35744026002 | 3.50 ppb |
| 2022-08-30 | 35744026003 | 3.80 ppb |
| 2022-08-30 | 35744026004 | 3.50 ppb |
| 2022-08-30 | 35744026005 | 3.50 ppb |
| 2022-08-30 | 35744026006 | ND |
| 2022-11-03 | 35758052001 | 1.90 ppb |
| 2022-11-03 | 35758052002 | 1.80 ppb |
| 2022-11-03 | 35758052003 | 2.00 ppb |
| 2022-11-03 | 35758052004 | 1.80 ppb |
| 2022-11-03 | 35758052005 | 1.70 ppb |
| 2022-11-03 | 35758052006 | 2.00 ppb |
| 2022-11-03 | 35758052007 | 1.80 ppb |
| 2022-11-03 | 35758052008 | ND |
| 2023-02-03 | 35776923001 | 2.00 ppb |
| 2023-02-03 | 35776923002 | 2.10 ppb |
| 2023-02-03 | 35776923003 | 1.90 ppb |
| 2023-02-03 | 35776923004 | 2.30 ppb |
| 2023-02-03 | 35776923005 | 2.00 ppb |
| 2023-02-03 | 35776923006 | 2.60 ppb |
| 2023-02-03 | 35776923007 | 2.00 ppb |
| 2023-02-03 | 35776923008 | 2.90 ppb |
| 2023-05-03 | 35797763001 | ND |
| 2023-05-03 | 35797763002 | ND |
| 2023-05-03 | 35797763003 | ND |
| 2023-05-03 | 35797763004 | ND |
| 2023-05-03 | 35797763005 | ND |
| 2023-05-03 | 35797763006 | ND |
| 2023-05-03 | 35797763007 | ND |
| 2023-05-03 | 35797763008 | ND |
| 2023-08-02 | 35818360001 | 3.20 ppb |
| 2023-08-02 | 35818360002 | 3.50 ppb |
| 2023-08-02 | 35818360003 | 3.90 ppb |
| 2023-08-02 | 35818360004 | 4.20 ppb |
| 2023-08-02 | 35818360005 | 3.70 ppb |
| 2023-08-02 | 35818360006 | 3.70 ppb |
| 2023-08-02 | 35818360007 | 3.90 ppb |
| 2023-08-02 | 35818360008 | 0.990 ppb |
| 2023-11-02 | 35839243001 | ND |
| 2023-11-02 | 35839243002 | ND |
| 2023-11-02 | 35839243003 | ND |
| 2023-11-02 | 35839243004 | 1.10 ppb |
| 2023-11-02 | 35839243005 | ND |
| 2023-11-02 | 35839243006 | 1.40 ppb |
| 2023-11-02 | 35839243007 | 1.40 ppb |
| 2023-11-02 | 35839243008 | 2.30 ppb |