Trichloroacetic acid
Schriever Water Treatment Service Area
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.
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 | 6.79 ppb | 64 | 64 | 3.70 ppb - 9.90 ppb |
| 2019 | 7.38 ppb | 64 | 64 | 5.70 ppb - 10.2 ppb |
| 2020 | 4.98 ppb | 32 | 32 | 3.60 ppb - 8.20 ppb |
| 2021 | 10.5 ppb | 33 | 33 | 4.50 ppb - 25.0 ppb |
| 2022 | 6.71 ppb | 34 | 34 | 2.90 ppb - 15.9 ppb |
| 2023 | 7.01 ppb | 32 | 32 | 2.40 ppb - 12.4 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 |
|---|---|---|
| 2018-03-09 | 35379412001 | 3.70 ppb |
| 2018-03-09 | 35379412002 | 5.20 ppb |
| 2018-03-09 | 35379412003 | 4.40 ppb |
| 2018-03-09 | 35379412004 | 4.40 ppb |
| 2018-03-09 | 35379412005 | 4.20 ppb |
| 2018-03-09 | 35379412006 | 4.90 ppb |
| 2018-03-09 | 35379412007 | 4.10 ppb |
| 2018-03-09 | 35379412008 | 4.50 ppb |
| 2018-03-09 | 35379412001 | 3.70 ppb |
| 2018-03-09 | 35379412002 | 5.20 ppb |
| 2018-03-09 | 35379412003 | 4.40 ppb |
| 2018-03-09 | 35379412004 | 4.40 ppb |
| 2018-03-09 | 35379412005 | 4.20 ppb |
| 2018-03-09 | 35379412006 | 4.90 ppb |
| 2018-03-09 | 35379412007 | 4.10 ppb |
| 2018-03-09 | 35379412008 | 4.50 ppb |
| 2018-06-05 | 35396534001 | 5.70 ppb |
| 2018-06-05 | 35396534002 | 6.20 ppb |
| 2018-06-05 | 35396534003 | 5.90 ppb |
| 2018-06-05 | 35396534004 | 6.00 ppb |
| 2018-06-05 | 35396534005 | 6.20 ppb |
| 2018-06-05 | 35396534006 | 5.00 ppb |
| 2018-06-05 | 35396534007 | 6.00 ppb |
| 2018-06-05 | 35396534008 | 6.20 ppb |
| 2018-06-05 | 35396534001 | 5.70 ppb |
| 2018-06-05 | 35396534002 | 6.20 ppb |
| 2018-06-05 | 35396534003 | 5.90 ppb |
| 2018-06-05 | 35396534004 | 6.00 ppb |
| 2018-06-05 | 35396534005 | 6.20 ppb |
| 2018-06-05 | 35396534006 | 5.00 ppb |
| 2018-06-05 | 35396534007 | 6.00 ppb |
| 2018-06-05 | 35396534008 | 6.20 ppb |
| 2018-09-19 | 35419185001 | 5.70 ppb |
| 2018-09-19 | 35419185002 | 7.80 ppb |
| 2018-09-19 | 35419185003 | 7.90 ppb |
| 2018-09-19 | 35419185004 | 8.40 ppb |
| 2018-09-19 | 35419185005 | 7.70 ppb |
| 2018-09-19 | 35419185006 | 7.00 ppb |
| 2018-09-19 | 35419185007 | 7.90 ppb |
| 2018-09-19 | 35419185008 | 8.60 ppb |
| 2018-09-19 | 35419185001 | 5.70 ppb |
| 2018-09-19 | 35419185002 | 7.80 ppb |
| 2018-09-19 | 35419185003 | 7.90 ppb |
| 2018-09-19 | 35419185004 | 8.40 ppb |
| 2018-09-19 | 35419185005 | 7.70 ppb |
| 2018-09-19 | 35419185006 | 7.00 ppb |
| 2018-09-19 | 35419185007 | 7.90 ppb |
| 2018-09-19 | 35419185008 | 8.60 ppb |
| 2018-12-04 | 35435069001 | 7.80 ppb |
| 2018-12-04 | 35435069002 | 9.00 ppb |
| 2018-12-04 | 35435069003 | 9.60 ppb |
| 2018-12-04 | 35435069004 | 9.90 ppb |
| 2018-12-04 | 35435069005 | 9.60 ppb |
| 2018-12-04 | 35435069006 | 8.50 ppb |
| 2018-12-04 | 35435069007 | 9.60 ppb |
| 2018-12-04 | 35435069008 | 9.80 ppb |
| 2018-12-04 | 35435069001 | 7.80 ppb |
| 2018-12-04 | 35435069002 | 9.00 ppb |
| 2018-12-04 | 35435069003 | 9.60 ppb |
| 2018-12-04 | 35435069004 | 9.90 ppb |
| 2018-12-04 | 35435069005 | 9.60 ppb |
| 2018-12-04 | 35435069006 | 8.50 ppb |
| 2018-12-04 | 35435069007 | 9.60 ppb |
| 2018-12-04 | 35435069008 | 9.80 ppb |
| 2019-03-12 | 35454240001 | 6.80 ppb |
| 2019-03-12 | 35454240002 | 6.50 ppb |
| 2019-03-12 | 35454240003 | 7.30 ppb |
| 2019-03-12 | 35454240004 | 6.70 ppb |
| 2019-03-12 | 35454240005 | 6.90 ppb |
| 2019-03-12 | 35454240006 | 6.90 ppb |
| 2019-03-12 | 35454240007 | 6.90 ppb |
| 2019-03-12 | 35454240008 | 7.00 ppb |
| 2019-03-12 | 35454240001 | 6.80 ppb |
| 2019-03-12 | 35454240002 | 6.50 ppb |
| 2019-03-12 | 35454240003 | 7.30 ppb |
| 2019-03-12 | 35454240004 | 6.70 ppb |
| 2019-03-12 | 35454240005 | 6.90 ppb |
| 2019-03-12 | 35454240006 | 6.90 ppb |
| 2019-03-12 | 35454240007 | 6.90 ppb |
| 2019-03-12 | 35454240008 | 7.00 ppb |
| 2019-06-10 | 35474484001 | 6.70 ppb |
| 2019-06-10 | 35474484002 | 9.00 ppb |
| 2019-06-10 | 35474484003 | 8.90 ppb |
| 2019-06-10 | 35474484004 | 8.60 ppb |
| 2019-06-10 | 35474484005 | 8.50 ppb |
| 2019-06-10 | 35474484006 | 8.90 ppb |
| 2019-06-10 | 35474484007 | 8.30 ppb |
| 2019-06-10 | 35474484008 | 8.10 ppb |
| 2019-06-10 | 35474484001 | 6.70 ppb |
| 2019-06-10 | 35474484002 | 9.00 ppb |
| 2019-06-10 | 35474484003 | 8.90 ppb |
| 2019-06-10 | 35474484004 | 8.60 ppb |
| 2019-06-10 | 35474484005 | 8.50 ppb |
| 2019-06-10 | 35474484006 | 8.90 ppb |
| 2019-06-10 | 35474484007 | 8.30 ppb |
| 2019-06-10 | 35474484008 | 8.10 ppb |
| 2019-09-10 | 35496772001 | 6.10 ppb |
| 2019-09-10 | 35496772002 | 6.30 ppb |
| 2019-09-10 | 35496772003 | 8.70 ppb |
| 2019-09-10 | 35496772004 | 7.80 ppb |
| 2019-09-10 | 35496772005 | 8.30 ppb |
| 2019-09-10 | 35496772006 | 10.2 ppb |
| 2019-09-10 | 35496772007 | 7.90 ppb |
| 2019-09-10 | 35496772008 | 7.10 ppb |
| 2019-09-10 | 35496772001 | 6.10 ppb |
| 2019-09-10 | 35496772002 | 6.30 ppb |
| 2019-09-10 | 35496772003 | 8.70 ppb |
| 2019-09-10 | 35496772004 | 7.80 ppb |
| 2019-09-10 | 35496772005 | 8.30 ppb |
| 2019-09-10 | 35496772006 | 10.2 ppb |
| 2019-09-10 | 35496772007 | 7.90 ppb |
| 2019-09-10 | 35496772008 | 7.10 ppb |
| 2019-12-11 | 35518241001 | 7.10 ppb |
| 2019-12-11 | 35518241002 | 6.40 ppb |
| 2019-12-11 | 35518241003 | 6.60 ppb |
| 2019-12-11 | 35518241004 | 6.60 ppb |
| 2019-12-11 | 35518241005 | 6.60 ppb |
| 2019-12-11 | 35518241006 | 6.60 ppb |
| 2019-12-11 | 35518241007 | 6.30 ppb |
| 2019-12-11 | 35518241008 | 5.70 ppb |
| 2019-12-11 | 35518241001 | 7.10 ppb |
| 2019-12-11 | 35518241002 | 6.40 ppb |
| 2019-12-11 | 35518241003 | 6.60 ppb |
| 2019-12-11 | 35518241004 | 6.60 ppb |
| 2019-12-11 | 35518241005 | 6.60 ppb |
| 2019-12-11 | 35518241006 | 6.60 ppb |
| 2019-12-11 | 35518241007 | 6.30 ppb |
| 2019-12-11 | 35518241008 | 5.70 ppb |
| 2020-03-12 | 35537425001 | 5.20 ppb |
| 2020-03-12 | 35537425002 | 4.90 ppb |
| 2020-03-12 | 35537425003 | 4.60 ppb |
| 2020-03-12 | 35537425004 | 4.50 ppb |
| 2020-03-12 | 35537425005 | 4.30 ppb |
| 2020-03-12 | 35537425006 | 4.80 ppb |
| 2020-03-12 | 35537425007 | 4.60 ppb |
| 2020-03-12 | 35537425008 | 4.30 ppb |
| 2020-06-12 | 35556393001 | 8.20 ppb |
| 2020-06-12 | 35556393002 | 6.50 ppb |
| 2020-06-12 | 35556393003 | 6.70 ppb |
| 2020-06-12 | 35556393004 | 6.60 ppb |
| 2020-06-12 | 35556393005 | 7.00 ppb |
| 2020-06-12 | 35556393006 | 6.70 ppb |
| 2020-06-12 | 35556393007 | 6.20 ppb |
| 2020-06-12 | 35556393008 | 6.20 ppb |
| 2020-09-17 | 35578893001 | 4.20 ppb |
| 2020-09-17 | 35578893002 | 3.90 ppb |
| 2020-09-17 | 35578893003 | 3.60 ppb |
| 2020-09-17 | 35578893004 | 4.00 ppb |
| 2020-09-17 | 35578893005 | 3.60 ppb |
| 2020-09-17 | 35578893006 | 4.00 ppb |
| 2020-09-17 | 35578893007 | 3.80 ppb |
| 2020-09-17 | 35578893008 | 4.60 ppb |
| 2020-12-17 | 35600000001 | 5.60 ppb |
| 2020-12-17 | 35600000002 | 4.60 ppb |
| 2020-12-17 | 35600000003 | 4.90 ppb |
| 2020-12-17 | 35600000004 | 4.20 ppb |
| 2020-12-17 | 35600000005 | 4.60 ppb |
| 2020-12-17 | 35600000006 | 4.20 ppb |
| 2020-12-17 | 35600000007 | 4.10 ppb |
| 2020-12-17 | 35600000008 | 4.10 ppb |
| 2021-03-05 | 35617074001 | 5.70 ppb |
| 2021-03-05 | 35617074002 | 4.50 ppb |
| 2021-03-05 | 35617074003 | 4.90 ppb |
| 2021-03-05 | 35617074004 | 5.30 ppb |
| 2021-03-05 | 35617074005 | 5.10 ppb |
| 2021-03-05 | 35617074006 | 5.40 ppb |
| 2021-03-05 | 35617074007 | 5.40 ppb |
| 2021-03-05 | 35617074008 | 4.50 ppb |
| 2021-06-10 | 35640075001 | 6.90 ppb |
| 2021-06-10 | 35640075002 | 6.60 ppb |
| 2021-06-10 | 35640075003 | 6.10 ppb |
| 2021-06-10 | 35640075004 | 6.70 ppb |
| 2021-06-10 | 35640075005 | 6.50 ppb |
| 2021-06-10 | 35640075006 | 6.20 ppb |
| 2021-06-10 | 35640075007 | 6.30 ppb |
| 2021-06-10 | 35640075008 | 6.20 ppb |
| 2021-09-16 | 35664177001 | 9.30 ppb |
| 2021-09-16 | 35664177003 | 11.3 ppb |
| 2021-09-16 | 35664177004 | 14.3 ppb |
| 2021-09-30 | 35669021001 | 18.7 ppb |
| 2021-10-29 | 35675828001 | 13.4 ppb |
| 2021-10-29 | 35675828002 | 18.6 ppb |
| 2021-10-29 | 35675828003 | 16.9 ppb |
| 2021-10-29 | 35675828004 | 18.3 ppb |
| 2021-10-29 | 35675828005 | 13.1 ppb |
| 2021-12-02 | 35681497001 | 8.50 ppb |
| 2021-12-02 | 35681497002 | 14.6 ppb |
| 2021-12-02 | 35681497003 | 13.1 ppb |
| 2021-12-02 | 35681497004 | 13.5 ppb |
| 2021-12-02 | 35681497005 | 17.4 ppb |
| 2021-12-02 | 35681497006 | 15.5 ppb |
| 2021-12-02 | 35681497007 | 25.0 ppb |
| 2021-12-02 | 35681497008 | 14.3 ppb |
| 2022-03-11 | 35703403001 | 4.10 ppb |
| 2022-03-11 | 35703403002 | 4.30 ppb |
| 2022-03-11 | 35703403003 | 8.40 ppb |
| 2022-03-11 | 35703403004 | 8.40 ppb |
| 2022-03-11 | 35703403005 | 8.20 ppb |
| 2022-03-11 | 35703403006 | 8.40 ppb |
| 2022-03-11 | 35703403007 | 5.40 ppb |
| 2022-03-11 | 35703403008 | 4.50 ppb |
| 2022-03-17 | 35704970001 | 4.80 ppb |
| 2022-03-17 | 35704970002 | 5.10 ppb |
| 2022-06-15 | B2202780-001 | 8.81 ppb |
| 2022-06-15 | B2202780-002 | 6.04 ppb |
| 2022-06-15 | B2202780-003 | 6.66 ppb |
| 2022-06-15 | B2202780-004 | 8.82 ppb |
| 2022-06-15 | B2202780-005 | 8.28 ppb |
| 2022-06-15 | B2202780-006 | 5.76 ppb |
| 2022-06-15 | B2202780-007 | 5.70 ppb |
| 2022-06-15 | B2202780-008 | 8.30 ppb |
| 2022-09-08 | 35745433001 | 4.50 ppb |
| 2022-09-08 | 35745433002 | 4.70 ppb |
| 2022-09-08 | 35745433003 | 4.50 ppb |
| 2022-09-08 | 35745433004 | 8.70 ppb |
| 2022-09-08 | 35745433005 | 9.20 ppb |
| 2022-09-08 | 35745433006 | 9.50 ppb |
| 2022-09-08 | 35745433007 | 15.9 ppb |
| 2022-09-08 | 35745433008 | 4.50 ppb |
| 2022-12-08 | 35765453001 | 2.90 ppb |
| 2022-12-08 | 35765453002 | 4.70 ppb |
| 2022-12-08 | 35765453003 | 4.50 ppb |
| 2022-12-08 | 35765453004 | 7.90 ppb |
| 2022-12-08 | 35765453005 | 7.30 ppb |
| 2022-12-08 | 35765453006 | 7.00 ppb |
| 2022-12-08 | 35765453007 | 6.90 ppb |
| 2022-12-08 | 35765453008 | 5.30 ppb |
| 2023-03-02 | 35783375001 | 4.00 ppb |
| 2023-03-02 | 35783375002 | 5.10 ppb |
| 2023-03-02 | 35783375003 | 5.30 ppb |
| 2023-03-02 | 35783375004 | 10.2 ppb |
| 2023-03-02 | 35783375005 | 11.6 ppb |
| 2023-03-02 | 35783375006 | 12.2 ppb |
| 2023-03-02 | 35783375007 | 11.3 ppb |
| 2023-03-02 | 35783375008 | 5.10 ppb |
| 2023-06-14 | 35806771001 | 8.00 ppb |
| 2023-06-14 | 35806771002 | 7.90 ppb |
| 2023-06-14 | 35806771003 | 8.60 ppb |
| 2023-06-14 | 35806771004 | 12.4 ppb |
| 2023-06-14 | 35806771005 | 11.0 ppb |
| 2023-06-14 | 35806771006 | 11.3 ppb |
| 2023-06-14 | 35806771007 | 11.2 ppb |
| 2023-06-14 | 35806771008 | 7.50 ppb |
| 2023-09-12 | 35827662001 | 4.70 ppb |
| 2023-09-12 | 35827662002 | 4.30 ppb |
| 2023-09-12 | 35827662003 | 4.40 ppb |
| 2023-09-12 | 35827662004 | 8.50 ppb |
| 2023-09-12 | 35827662005 | 9.70 ppb |
| 2023-09-12 | 35827662006 | 10.6 ppb |
| 2023-09-12 | 35827662007 | 11.0 ppb |
| 2023-09-12 | 35827662008 | 4.90 ppb |
| 2023-12-15 | 35849368001 | 3.10 ppb |
| 2023-12-15 | 35849368002 | 2.40 ppb |
| 2023-12-15 | 35849368003 | 2.50 ppb |
| 2023-12-15 | 35849368004 | 3.30 ppb |
| 2023-12-15 | 35849368005 | 2.90 ppb |
| 2023-12-15 | 35849368006 | 3.00 ppb |
| 2023-12-15 | 35849368007 | 2.90 ppb |
| 2023-12-15 | 35849368008 | 3.30 ppb |