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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

CTWC - Shoreline Region-Guilford System

Trichloroacetic 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

 

80

Samples

0

Samples exceeding legal limit (MCL)

80

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20149.59 ppb16161.000 ppb - 15.0 ppb
2015N/A00N/A
20168.72 ppb16163.50 ppb - 14.0 ppb
201713.7 ppb16165.20 ppb - 21.0 ppb
20188.63 ppb16162.10 ppb - 16.0 ppb
20196.33 ppb16162.40 ppb - 11.3 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-213483HAA59.00 ppb
2014-03-213484HAA512.0 ppb
2014-03-213485HAA510.00 ppb
2014-03-213482HAA59.00 ppb
2014-06-1887612HAA51.000 ppb
2014-06-188761HAA51.000 ppb
2014-06-188764HAA511.0 ppb
2014-06-188765HAA510.00 ppb
2014-09-15BH14104HAA59.20 ppb
2014-09-15BH14103HAA511.0 ppb
2014-09-15BH14102HAA59.60 ppb
2014-09-15BH14101HAA57.40 ppb
2014-12-17BH54708HAA59.30 ppb
2014-12-17BH54709HAA514.0 ppb
2014-12-17BH54710HAA515.0 ppb
2014-12-17BH54711HAA515.0 ppb
2016-03-15BK78692HAA58.40 ppb
2016-03-15BK78693HAA55.30 ppb
2016-03-15BK78696HAA57.20 ppb
2016-03-15BK78697HAA57.00 ppb
2016-06-14BN54617HAA56.50 ppb
2016-06-14BN54619HAA58.70 ppb
2016-06-14BN54618HAA59.20 ppb
2016-06-14BN54616HAA57.90 ppb
2016-09-14BV14929HAA59.10 ppb
2016-09-14BV14930HAA55.20 ppb
2016-09-14BV14931HAA514.0 ppb
2016-09-14BV14928HAA59.50 ppb
2016-12-15BX06134HAA514.0 ppb
2016-12-15BX06135HAA513.0 ppb
2016-12-15BX06136HAA53.50 ppb
2016-12-15BX06137HAA511.0 ppb
2017-03-17BX89073HAA55.20 ppb
2017-03-17BX89078HAA58.20 ppb
2017-03-17BX89077HAA59.50 ppb
2017-03-17BX89076HAA59.50 ppb
2017-06-19BY42240HAA515.0 ppb
2017-06-19BY42241HAA521.0 ppb
2017-06-19BY42242HAA521.0 ppb
2017-06-19BY42243HAA515.0 ppb
2017-09-14BZ02390HAA515.0 ppb
2017-09-14BZ02387HAA510.00 ppb
2017-09-14BZ02388HAA514.0 ppb
2017-09-14BZ02389HAA514.0 ppb
2017-12-14BZ60232HAA517.0 ppb
2017-12-14BZ60233HAA512.0 ppb
2017-12-14BZ60234HAA516.0 ppb
2017-12-14BZ60231HAA516.0 ppb
2018-03-15CA03073HAA57.30 ppb
2018-03-15CA03074HAA55.30 ppb
2018-03-15CA03075HAA59.10 ppb
2018-03-15CA03076HAA59.00 ppb
2018-06-26CA80046HAA511.0 ppb
2018-06-26CA80048HAA58.40 ppb
2018-06-26CA80047HAA59.30 ppb
2018-06-26CA80045HAA516.0 ppb
2018-09-12DBP 2005050429.60 ppb
2018-09-12DBP 20050504312.9 ppb
2018-09-12DBP 20050504413.9 ppb
2018-09-12DBP 20050504713.4 ppb
2018-12-17DBP 2005162394.00 ppb
2018-12-17DBP 2005162372.10 ppb
2018-12-17DBP 2005162352.70 ppb
2018-12-17DBP 2005162384.00 ppb
2019-03-11DBP 2005241502.40 ppb
2019-03-11DBP 2005241513.60 ppb
2019-03-11DBP 2005241524.70 ppb
2019-03-11DBP 2005241544.90 ppb
2019-06-14DBP 2005366826.10 ppb
2019-06-14DBP 2005366805.40 ppb
2019-06-14DBP 2005366745.10 ppb
2019-06-14DBP 2005366723.80 ppb
2019-09-17DBP 2005494784.80 ppb
2019-09-17DBP 2005494797.10 ppb
2019-09-17DBP 2005494807.20 ppb
2019-09-17DBP 2005494817.50 ppb
2019-12-10DBP 2005596426.30 ppb
2019-12-10DBP 20055964310.1 ppb
2019-12-10DBP 20055964411.0 ppb
2019-12-10DBP 20055964511.3 ppb