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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Butte-Silver Bow Water Department

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.

MORE ABOUT THIS CONTAMINANT

 

208

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.535 ppb4824ND - 1.60 ppb
20150.571 ppb4820ND - 3.40 ppb
20160.503 ppb4821ND - 1.80 ppb
20171.02 ppb3226ND - 2.20 ppb
20180.180 ppb163ND - 1.10 ppb
20190.0994 ppb162ND - 0.810 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-12B14030943-001B0.770 ppb
2014-03-12B14030943-002BND
2014-03-12B14030943-003BND
2014-03-12B14030943-004B0.750 ppb
2014-03-12B14030943-005BND
2014-03-12B14030943-006BND
2014-03-12B14030943-007BND
2014-03-12B14030943-008BND
2014-03-12B14030943-009B0.810 ppb
2014-03-12B14030943-010B0.880 ppb
2014-03-12B14030943-011B1.60 ppb
2014-03-12B14030943-012BND
2014-06-09B14060874-001B1.20 ppb
2014-06-09B14060874-002B1.20 ppb
2014-06-09B14060874-003B1.40 ppb
2014-06-09B14060874-004B1.10 ppb
2014-06-09B14060874-005B0.910 ppb
2014-06-09B14060874-006B1.10 ppb
2014-06-09B14060874-007BND
2014-06-09B14060874-008B0.960 ppb
2014-06-09B14060874-009BND
2014-06-09B14060874-010BND
2014-06-09B14060874-011BND
2014-06-09B14060874-012BND
2014-09-15B14091399-001B1.10 ppb
2014-09-15B14091399-002B1.20 ppb
2014-09-15B14091399-003B1.60 ppb
2014-09-15B14091399-004B1.40 ppb
2014-09-15B14091399-005B1.10 ppb
2014-09-15B14091399-006B1.20 ppb
2014-09-15B14091399-007B0.890 ppb
2014-09-15B14091399-008B1.10 ppb
2014-09-15B14091399-009B0.950 ppb
2014-09-15B14091399-010B0.940 ppb
2014-09-15B14091399-011B0.780 ppb
2014-09-15B14091399-012BND
2014-12-10B14121049-001B0.760 ppb
2014-12-10B14121049-002BND
2014-12-10B14121049-003BND
2014-12-10B14121049-004BND
2014-12-10B14121049-005BND
2014-12-10B14121049-006BND
2014-12-10B14121049-007BND
2014-12-10B14121049-008BND
2014-12-10B14121049-009BND
2014-12-10B14121049-010BND
2014-12-10B14121049-011BND
2014-12-10B14121049-012BND
2015-03-09B15030709-001BND
2015-03-09B15030709-002BND
2015-03-09B15030709-003BND
2015-03-09B15030709-004BND
2015-03-09B15030709-005BND
2015-03-09B15030709-006BND
2015-03-09B15030709-007BND
2015-03-09B15030709-008BND
2015-03-09B15030709-009BND
2015-03-09B15030709-010BND
2015-03-09B15030709-011BND
2015-03-09B15030709-012BND
2015-06-08B15060859-001B1.000 ppb
2015-06-08B15060859-002B1.40 ppb
2015-06-08B15060859-003B1.20 ppb
2015-06-08B15060859-004B1.90 ppb
2015-06-08B15060859-005B1.60 ppb
2015-06-08B15060859-006B0.770 ppb
2015-06-08B15060859-007B3.40 ppb
2015-06-08B15060859-008B2.30 ppb
2015-06-08B15060859-009B0.940 ppb
2015-06-08B15060859-010BND
2015-06-08B15060859-011BND
2015-06-08B15060859-012BND
2015-09-14B15091265-001B1.000 ppb
2015-09-14B15091265-002B0.790 ppb
2015-09-14B15091265-003B1.50 ppb
2015-09-14B15091265-004B1.40 ppb
2015-09-14B15091265-005B1.30 ppb
2015-09-14B15091265-006B1.50 ppb
2015-09-14B15091265-007B0.920 ppb
2015-09-14B15091265-008B1.50 ppb
2015-09-14B15091265-009B0.750 ppb
2015-09-14B15091265-010B0.840 ppb
2015-09-14B15091265-011B1.40 ppb
2015-09-14B15091265-012BND
2015-12-09B15120901-001BND
2015-12-09B15120901-002BND
2015-12-09B15120901-003BND
2015-12-09B15120901-004BND
2015-12-09B15120901-005BND
2015-12-09B15120901-006BND
2015-12-09B15120901-007BND
2015-12-09B15120901-008BND
2015-12-09B15120901-009BND
2015-12-09B15120901-010BND
2015-12-09B15120901-011BND
2015-12-09B15120901-012BND
2016-03-09B16031005-001BND
2016-03-09B16031005-002BND
2016-03-09B16031005-003BND
2016-03-09B16031005-004BND
2016-03-09B16031005-005BND
2016-03-09B16031005-006BND
2016-03-09B16031005-007BND
2016-03-09B16031005-008BND
2016-03-09B16031005-009BND
2016-03-09B16031005-010BND
2016-03-09B16031005-011BND
2016-03-09B16031005-012BND
2016-06-07B16060715-001B1.80 ppb
2016-06-07B16060715-002B1.20 ppb
2016-06-07B16060715-003B1.50 ppb
2016-06-07B16060715-004B1.30 ppb
2016-06-07B16060715-005B1.10 ppb
2016-06-07B16060715-006B0.940 ppb
2016-06-07B16060715-007B1.30 ppb
2016-06-07B16060715-008B0.910 ppb
2016-06-07B16060715-009B0.980 ppb
2016-06-07B16060715-010B0.850 ppb
2016-06-07B16060715-011B0.790 ppb
2016-06-07B16060715-012BND
2016-09-08B16090760-001B1.40 ppb
2016-09-08B16090760-002B0.910 ppb
2016-09-08B16090760-003B1.30 ppb
2016-09-08B16090760-004B1.30 ppb
2016-09-08B16090760-005B1.10 ppb
2016-09-08B16090760-006B1.30 ppb
2016-09-08B16090760-007BND
2016-09-08B16090760-008B1.10 ppb
2016-09-08B16090760-009B0.880 ppb
2016-09-08B16090760-010B1.10 ppb
2016-09-08B16090760-011B1.10 ppb
2016-09-08B16090760-012BND
2016-12-12B16120906-001BND
2016-12-12B16120906-002BND
2016-12-12B16120906-003BND
2016-12-12B16120906-004BND
2016-12-12B16120906-005BND
2016-12-12B16120906-006BND
2016-12-12B16120906-007BND
2016-12-12B16120906-008BND
2016-12-12B16120906-009BND
2016-12-12B16120906-010BND
2016-12-12B16120906-011BND
2016-12-12B16120906-012BND
2017-03-13B17030964-001B1.000 ppb
2017-03-13B17030964-002B1.20 ppb
2017-03-13B17030964-003B1.20 ppb
2017-03-13B17030964-004B1.000 ppb
2017-03-13B17030964-005B1.20 ppb
2017-03-13B17030964-006B1.20 ppb
2017-03-13B17030964-007B1.30 ppb
2017-03-13B17030964-008B0.930 ppb
2017-03-13B17030964-009B1.10 ppb
2017-03-13B17030964-010B1.20 ppb
2017-03-13B17030964-011B1.000 ppb
2017-03-13B17030964-012BND
2017-06-13B17061376-001A0.820 ppb
2017-06-13B17061376-002A1.000 ppb
2017-06-13B17061376-003A0.800 ppb
2017-06-13B17061376-004A1.60 ppb
2017-06-13B17061376-005A1.80 ppb
2017-06-13B17061376-006A1.90 ppb
2017-06-13B17061376-007A2.20 ppb
2017-06-13B17061376-008A1.80 ppb
2017-06-13B17061376-009A1.40 ppb
2017-06-13B17061376-010A1.30 ppb
2017-06-13B17061376-011A1.30 ppb
2017-06-13B17061376-012A1.000 ppb
2017-09-13B17091212-001B1.10 ppb
2017-09-13B17091212-002B1.30 ppb
2017-09-13B17091212-003BND
2017-09-13B17091212-004BND
2017-12-13B17121307-001B0.850 ppb
2017-12-13B17121307-002BND
2017-12-13B17121307-003BND
2017-12-13B17121307-004BND
2018-03-14B18031225-001BND
2018-03-14B18031225-002BND
2018-03-14B18031225-003BND
2018-03-14B18031225-004BND
2018-06-11B18061054-001B1.10 ppb
2018-06-11B18061054-002B1.000 ppb
2018-06-11B18061054-003BND
2018-06-11B18061054-004B0.780 ppb
2018-09-11B18090899-001AND
2018-09-11B18090899-002AND
2018-09-11B18090899-003AND
2018-09-11B18090899-004AND
2018-12-12B18121075-001AND
2018-12-12B18121075-002AND
2018-12-12B18121075-003AND
2018-12-12B18121075-004AND
2019-03-13B19031024-001AND
2019-03-13B19031024-002AND
2019-03-13B19031024-003AND
2019-03-13B19031024-004AND
2019-06-12B19061217-001A0.780 ppb
2019-06-12B19061217-002A0.810 ppb
2019-06-12B19061217-003AND
2019-06-12B19061217-004AND
2019-09-11B19091090-001AND
2019-09-11B19091090-002AND
2019-09-11B19091090-003AND
2019-09-11B19091090-004AND
2019-12-11B19121117-001AND
2019-12-11B19121117-002AND
2019-12-11B19121117-003AND
2019-12-11B19121117-004AND