Know Your Environment. Protect Your Health.

Trichloroacetic acid

City of Tacoma

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.

 

261

Samples

0

Samples exceeding legal limit (MCL)

220

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.61 ppb5751ND - 4.90 ppb
20193.26 ppb48481.40 ppb - 5.60 ppb
2020N/A00N/A
20211.65 ppb5443ND - 5.40 ppb
20222.12 ppb5149ND - 4.53 ppb
20230.713 ppb5129ND - 3.45 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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. This health guideline protects against cancer and harm to reproduction and child development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-023.00 ppb
2018-01-022.70 ppb
2018-01-023.40 ppb
2018-01-022.30 ppb
2018-01-021.90 ppb
2018-01-022.10 ppb
2018-01-023.40 ppb
2018-01-022.30 ppb
2018-01-022.90 ppb
2018-01-022.70 ppb
2018-01-021.70 ppb
2018-01-031.80 ppb
2018-01-03ND
2018-01-03ND
2018-01-031.40 ppb
2018-04-022.00 ppb
2018-04-022.70 ppb
2018-04-023.10 ppb
2018-04-022.60 ppb
2018-04-022.70 ppb
2018-04-022.50 ppb
2018-04-023.50 ppb
2018-04-022.60 ppb
2018-04-023.30 ppb
2018-04-022.30 ppb
2018-04-022.70 ppb
2018-04-02ND
2018-04-021.80 ppb
2018-04-03ND
2018-04-032.20 ppb
2018-07-021.60 ppb
2018-07-022.20 ppb
2018-07-022.30 ppb
2018-07-02ND
2018-07-02ND
2018-07-021.80 ppb
2018-07-022.00 ppb
2018-07-032.60 ppb
2018-07-032.70 ppb
2018-07-032.40 ppb
2018-07-032.70 ppb
2018-07-033.40 ppb
2018-07-032.70 ppb
2018-07-033.30 ppb
2018-07-032.40 ppb
2018-10-303.30 ppb
2018-10-303.70 ppb
2018-10-304.00 ppb
2018-10-303.40 ppb
2018-10-303.60 ppb
2018-10-314.40 ppb
2018-10-314.40 ppb
2018-10-314.80 ppb
2018-10-314.90 ppb
2018-10-314.80 ppb
2018-10-314.80 ppb
2018-10-314.70 ppb
2019-01-143.40 ppb
2019-01-144.40 ppb
2019-01-143.10 ppb
2019-01-145.60 ppb
2019-01-143.20 ppb
2019-01-145.40 ppb
2019-01-143.30 ppb
2019-01-143.30 ppb
2019-01-142.90 ppb
2019-01-144.20 ppb
2019-01-142.80 ppb
2019-01-153.20 ppb
2019-04-013.70 ppb
2019-04-013.50 ppb
2019-04-013.80 ppb
2019-04-013.20 ppb
2019-04-013.10 ppb
2019-04-013.00 ppb
2019-04-014.30 ppb
2019-04-013.20 ppb
2019-04-013.10 ppb
2019-04-013.80 ppb
2019-04-013.20 ppb
2019-04-032.80 ppb
2019-07-081.40 ppb
2019-07-081.70 ppb
2019-07-082.50 ppb
2019-07-081.50 ppb
2019-07-081.70 ppb
2019-07-081.70 ppb
2019-07-082.20 ppb
2019-07-081.80 ppb
2019-07-082.10 ppb
2019-07-082.00 ppb
2019-07-081.80 ppb
2019-07-081.60 ppb
2019-10-013.80 ppb
2019-10-014.00 ppb
2019-10-013.90 ppb
2019-10-014.00 ppb
2019-10-023.40 ppb
2019-10-024.30 ppb
2019-10-024.50 ppb
2019-10-024.40 ppb
2019-10-024.60 ppb
2019-10-024.80 ppb
2019-10-023.50 ppb
2019-10-023.60 ppb
2021-01-0440612001.40 ppb
2021-01-0440612071.70 ppb
2021-01-0440612052.00 ppb
2021-01-0440612081.30 ppb
2021-01-0440612063.00 ppb
2021-01-0440611991.50 ppb
2021-01-0440612021.80 ppb
2021-01-0440612011.40 ppb
2021-01-0440612091.20 ppb
2021-01-0440612031.20 ppb
2021-01-0440612041.20 ppb
2021-01-0540612101.60 ppb
2021-04-0540993983.43 ppb
2021-04-0540994002.77 ppb
2021-04-0540994012.47 ppb
2021-04-0540993973.67 ppb
2021-04-0540993992.30 ppb
2021-04-0540993912.37 ppb
2021-04-0540993925.40 ppb
2021-04-0540994022.24 ppb
2021-04-0540993951.76 ppb
2021-04-0540993931.70 ppb
2021-04-0540993962.78 ppb
2021-04-0640993942.11 ppb
2021-07-064145135ND
2021-07-064145146ND
2021-07-064145142ND
2021-07-064145148ND
2021-07-064145134ND
2021-07-064145143ND
2021-07-0641451411.40 ppb
2021-07-0641451471.14 ppb
2021-07-0641451451.05 ppb
2021-07-074145140ND
2021-07-0741451371.02 ppb
2021-07-0741451441.19 ppb
2021-07-0741451361.18 ppb
2021-07-074145138ND
2021-07-074145139ND
2021-10-0441984822.49 ppb
2021-10-0441984992.58 ppb
2021-10-0441984922.33 ppb
2021-10-0441984851.59 ppb
2021-10-0441984951.90 ppb
2021-10-0441984962.43 ppb
2021-10-0441985001.75 ppb
2021-10-0441984982.75 ppb
2021-10-0441984942.33 ppb
2021-10-0441984972.12 ppb
2021-10-0541985012.52 ppb
2021-10-054198503ND
2021-10-054198502ND
2021-10-0541985042.06 ppb
2021-10-0541984932.82 ppb
2022-01-0342278334.53 ppb
2022-01-0342278362.69 ppb
2022-01-0342278253.14 ppb
2022-01-0342278282.12 ppb
2022-01-0342278232.26 ppb
2022-01-0342278303.07 ppb
2022-01-0342278272.88 ppb
2022-01-0342278241.67 ppb
2022-01-0342278412.30 ppb
2022-01-0342278392.92 ppb
2022-01-0442278262.09 ppb
2022-01-044227844ND
2022-04-0442715332.02 ppb
2022-04-0442715401.91 ppb
2022-04-0442715352.82 ppb
2022-04-0442715371.76 ppb
2022-04-0442715391.57 ppb
2022-04-0442715311.86 ppb
2022-04-0442715363.83 ppb
2022-04-0442715381.57 ppb
2022-04-0442715291.78 ppb
2022-04-0442715321.96 ppb
2022-04-0442715342.32 ppb
2022-04-0442715301.86 ppb
2022-07-0543221622.72 ppb
2022-07-0543221711.93 ppb
2022-07-0543221642.80 ppb
2022-07-0543221682.30 ppb
2022-07-0543221672.61 ppb
2022-07-0543221632.69 ppb
2022-07-0543221693.71 ppb
2022-07-0543221702.44 ppb
2022-07-0643221732.77 ppb
2022-07-0643221771.07 ppb
2022-07-0643221791.75 ppb
2022-07-0643221781.10 ppb
2022-07-0643221662.87 ppb
2022-07-0643221722.47 ppb
2022-07-064322165ND
2022-10-0343705641.50 ppb
2022-10-0343705281.97 ppb
2022-10-0343705581.52 ppb
2022-10-0343705671.91 ppb
2022-10-0343705491.49 ppb
2022-10-0343705351.79 ppb
2022-10-0343705591.72 ppb
2022-10-0343705521.24 ppb
2022-10-0343705611.53 ppb
2022-10-0343705312.05 ppb
2022-10-0443705462.11 ppb
2022-10-0443705701.14 ppb
2023-01-0344153041.31 ppb
2023-01-0344152991.52 ppb
2023-01-0344152971.33 ppb
2023-01-0344153021.18 ppb
2023-01-0344153051.20 ppb
2023-01-0344153031.37 ppb
2023-01-0344153011.19 ppb
2023-01-0344153001.13 ppb
2023-01-0344152981.32 ppb
2023-01-0344152961.13 ppb
2023-01-0444153061.24 ppb
2023-01-0444153071.34 ppb
2023-04-0544442371.03 ppb
2023-04-0544442301.08 ppb
2023-04-054444232ND
2023-04-0544442281.000 ppb
2023-04-0544442361.15 ppb
2023-04-054444235ND
2023-04-0544442291.36 ppb
2023-04-0544442381.27 ppb
2023-04-054444233ND
2023-04-054444231ND
2023-04-054444234ND
2023-04-064444162ND
2023-04-064444158ND
2023-04-064444131ND
2023-04-064444169ND
2023-07-104507179ND
2023-07-104507185ND
2023-07-104507183ND
2023-07-104507181ND
2023-07-104507188ND
2023-07-104507184ND
2023-07-1045071823.45 ppb
2023-07-104507189ND
2023-07-104507187ND
2023-07-1045071801.13 ppb
2023-07-104507178ND
2023-07-114507186ND
2023-10-024554173ND
2023-10-024554182ND
2023-10-0245541751.21 ppb
2023-10-0245541791.06 ppb
2023-10-0245541771.03 ppb
2023-10-0245541721.05 ppb
2023-10-024554181ND
2023-10-0245541831.000 ppb
2023-10-0245541781.000 ppb
2023-10-0245541801.11 ppb
2023-10-0245541741.000 ppb
2023-10-0245541761.19 ppb