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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

City of Tacoma

Dichloroacetic 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

 

323

Samples

0

Samples exceeding legal limit (MCL)

286

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20145.86 ppb6045ND - 19.0 ppb
20153.39 ppb3835ND - 6.50 ppb
20162.16 ppb6046ND - 4.90 ppb
20172.62 ppb6057ND - 4.90 ppb
20182.87 ppb5755ND - 5.40 ppb
20193.31 ppb48481.60 ppb - 5.50 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2014-01-0790638ND
2014-01-07906342.00 ppb
2014-01-07906261.50 ppb
2014-01-07906301.30 ppb
2014-01-07906371.40 ppb
2014-01-07906333.20 ppb
2014-01-0790629ND
2014-01-0790640ND
2014-01-07906281.50 ppb
2014-01-07906322.30 ppb
2014-01-07906351.80 ppb
2014-01-07906311.50 ppb
2014-01-0790639ND
2014-01-07906362.00 ppb
2014-01-07906271.20 ppb
2014-04-14704671.10 ppb
2014-04-1470463ND
2014-04-1470469ND
2014-04-1470466ND
2014-04-1470471ND
2014-04-14704701.30 ppb
2014-04-14704611.10 ppb
2014-04-14704681.20 ppb
2014-04-1470462ND
2014-04-1570473ND
2014-04-1570475ND
2014-04-1570472ND
2014-04-1570464ND
2014-04-1570465ND
2014-04-1570474ND
2014-07-147068513.0 ppb
2014-07-147068213.0 ppb
2014-07-14706914.00 ppb
2014-07-147068812.0 ppb
2014-07-147068111.0 ppb
2014-07-147068612.0 ppb
2014-07-14706849.70 ppb
2014-07-147069013.0 ppb
2014-07-147068312.0 ppb
2014-07-147068912.0 ppb
2014-07-147068714.0 ppb
2014-07-157069510.00 ppb
2014-07-15706946.20 ppb
2014-07-157069213.0 ppb
2014-07-15706933.80 ppb
2014-10-060025615.0 ppb
2014-10-060025314.0 ppb
2014-10-06002593.40 ppb
2014-10-060025216.0 ppb
2014-10-060026114.0 ppb
2014-10-060025715.0 ppb
2014-10-06002582.00 ppb
2014-10-06002606.50 ppb
2014-10-060025415.0 ppb
2014-10-060025519.0 ppb
2014-10-07002628.30 ppb
2014-10-07002657.30 ppb
2014-10-070026314.0 ppb
2014-10-07002647.00 ppb
2014-10-070026612.0 ppb
2015-01-13507392.70 ppb
2015-01-13507381.60 ppb
2015-01-13507371.50 ppb
2015-01-13507363.20 ppb
2015-01-13507352.30 ppb
2015-01-14507336.00 ppb
2015-01-14507326.10 ppb
2015-01-14507316.50 ppb
2015-01-14507303.70 ppb
2015-01-14507294.10 ppb
2015-01-1450728ND
2015-01-14507273.60 ppb
2015-01-14507263.60 ppb
2015-01-14507344.00 ppb
2015-01-14507253.90 ppb
2015-07-07904213.00 ppb
2015-07-07904234.60 ppb
2015-07-08904201.10 ppb
2015-07-0890425ND
2015-07-08904271.30 ppb
2015-07-0890422ND
2015-07-08904242.50 ppb
2015-07-08904263.80 ppb
2015-10-13504093.50 ppb
2015-10-13504133.00 ppb
2015-10-13504121.90 ppb
2015-10-13504074.60 ppb
2015-10-13504105.30 ppb
2015-10-13503995.30 ppb
2015-10-13504044.80 ppb
2015-10-13504063.90 ppb
2015-10-13504014.80 ppb
2015-10-13504034.10 ppb
2015-10-13504004.30 ppb
2015-10-13504052.60 ppb
2015-10-13504085.40 ppb
2015-10-13504023.50 ppb
2015-10-14504112.60 ppb
2016-01-041.10 ppb
2016-01-041.40 ppb
2016-01-041.30 ppb
2016-01-041.60 ppb
2016-01-05ND
2016-01-05ND
2016-01-051.10 ppb
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-061.50 ppb
2016-01-061.30 ppb
2016-01-061.90 ppb
2016-01-061.70 ppb
2016-01-061.70 ppb
2016-04-041.10 ppb
2016-04-04ND
2016-04-044.10 ppb
2016-04-04ND
2016-04-04ND
2016-04-042.40 ppb
2016-04-043.40 ppb
2016-04-044.30 ppb
2016-04-042.30 ppb
2016-04-043.90 ppb
2016-04-041.000 ppb
2016-04-042.10 ppb
2016-04-04ND
2016-04-051.40 ppb
2016-04-05ND
2016-07-062.20 ppb
2016-07-06ND
2016-07-062.90 ppb
2016-07-062.80 ppb
2016-07-062.70 ppb
2016-07-06ND
2016-07-063.80 ppb
2016-07-062.90 ppb
2016-07-063.10 ppb
2016-07-063.70 ppb
2016-07-062.80 ppb
2016-07-064.80 ppb
2016-07-064.70 ppb
2016-07-061.90 ppb
2016-07-061.80 ppb
2016-10-033.40 ppb
2016-10-034.70 ppb
2016-10-034.20 ppb
2016-10-034.00 ppb
2016-10-034.20 ppb
2016-10-034.20 ppb
2016-10-034.90 ppb
2016-10-031.70 ppb
2016-10-034.10 ppb
2016-10-033.60 ppb
2016-10-04ND
2016-10-043.00 ppb
2016-10-04ND
2016-10-044.00 ppb
2016-10-043.00 ppb
2017-01-032.60 ppb
2017-01-031.20 ppb
2017-01-032.10 ppb
2017-01-032.10 ppb
2017-01-031.90 ppb
2017-01-03ND
2017-01-032.80 ppb
2017-01-032.00 ppb
2017-01-032.60 ppb
2017-01-03ND
2017-01-032.00 ppb
2017-01-031.60 ppb
2017-01-032.10 ppb
2017-01-031.50 ppb
2017-01-031.20 ppb
2017-04-032.50 ppb
2017-04-032.40 ppb
2017-04-033.00 ppb
2017-04-033.50 ppb
2017-04-032.80 ppb
2017-04-032.90 ppb
2017-04-032.70 ppb
2017-04-032.90 ppb
2017-04-033.00 ppb
2017-04-032.60 ppb
2017-04-032.80 ppb
2017-04-041.40 ppb
2017-04-042.00 ppb
2017-04-041.30 ppb
2017-04-052.90 ppb
2017-07-051.90 ppb
2017-07-05ND
2017-07-051.10 ppb
2017-07-053.40 ppb
2017-07-053.50 ppb
2017-07-052.40 ppb
2017-07-052.40 ppb
2017-07-052.40 ppb
2017-07-052.80 ppb
2017-07-063.30 ppb
2017-07-063.20 ppb
2017-07-062.90 ppb
2017-07-062.40 ppb
2017-07-062.40 ppb
2017-07-062.10 ppb
2017-10-024.00 ppb
2017-10-024.50 ppb
2017-10-024.80 ppb
2017-10-024.40 ppb
2017-10-023.00 ppb
2017-10-021.70 ppb
2017-10-023.20 ppb
2017-10-024.20 ppb
2017-10-024.00 ppb
2017-10-024.20 ppb
2017-10-024.30 ppb
2017-10-024.00 ppb
2017-10-024.90 ppb
2017-10-033.70 ppb
2017-10-031.80 ppb
2018-01-022.60 ppb
2018-01-022.70 ppb
2018-01-023.20 ppb
2018-01-022.40 ppb
2018-01-022.10 ppb
2018-01-022.20 ppb
2018-01-022.50 ppb
2018-01-022.40 ppb
2018-01-022.90 ppb
2018-01-022.60 ppb
2018-01-021.90 ppb
2018-01-031.90 ppb
2018-01-03ND
2018-01-03ND
2018-01-031.60 ppb
2018-04-022.10 ppb
2018-04-022.40 ppb
2018-04-022.70 ppb
2018-04-022.50 ppb
2018-04-022.40 ppb
2018-04-022.40 ppb
2018-04-022.70 ppb
2018-04-022.40 ppb
2018-04-023.20 ppb
2018-04-022.30 ppb
2018-04-022.50 ppb
2018-04-021.40 ppb
2018-04-021.90 ppb
2018-04-031.80 ppb
2018-04-033.00 ppb
2018-07-022.70 ppb
2018-07-023.30 ppb
2018-07-023.10 ppb
2018-07-021.70 ppb
2018-07-021.70 ppb
2018-07-022.60 ppb
2018-07-023.00 ppb
2018-07-033.00 ppb
2018-07-033.20 ppb
2018-07-032.90 ppb
2018-07-032.90 ppb
2018-07-033.70 ppb
2018-07-033.20 ppb
2018-07-034.20 ppb
2018-07-032.90 ppb
2018-10-304.10 ppb
2018-10-304.70 ppb
2018-10-304.40 ppb
2018-10-304.20 ppb
2018-10-304.40 ppb
2018-10-313.80 ppb
2018-10-314.80 ppb
2018-10-312.00 ppb
2018-10-315.40 ppb
2018-10-315.20 ppb
2018-10-315.10 ppb
2018-10-314.90 ppb
2019-01-142.90 ppb
2019-01-143.60 ppb
2019-01-142.90 ppb
2019-01-143.80 ppb
2019-01-143.10 ppb
2019-01-142.50 ppb
2019-01-143.00 ppb
2019-01-143.20 ppb
2019-01-142.40 ppb
2019-01-143.80 ppb
2019-01-142.40 ppb
2019-01-153.00 ppb
2019-04-013.50 ppb
2019-04-014.30 ppb
2019-04-013.90 ppb
2019-04-013.30 ppb
2019-04-013.40 ppb
2019-04-013.20 ppb
2019-04-014.80 ppb
2019-04-013.30 ppb
2019-04-013.20 ppb
2019-04-014.50 ppb
2019-04-013.90 ppb
2019-04-033.30 ppb
2019-07-081.70 ppb
2019-07-082.10 ppb
2019-07-082.60 ppb
2019-07-082.00 ppb
2019-07-082.10 ppb
2019-07-082.20 ppb
2019-07-082.50 ppb
2019-07-082.10 ppb
2019-07-082.80 ppb
2019-07-082.60 ppb
2019-07-082.20 ppb
2019-07-081.90 ppb
2019-10-014.50 ppb
2019-10-014.60 ppb
2019-10-014.60 ppb
2019-10-014.50 ppb
2019-10-023.80 ppb
2019-10-025.00 ppb
2019-10-023.90 ppb
2019-10-024.90 ppb
2019-10-025.50 ppb
2019-10-021.60 ppb
2019-10-024.00 ppb
2019-10-024.20 ppb