Trichloroacetic acid
Beauregard Water Works District #3
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 | 1.18 ppb | 48 | 48 | 0.470 ppb - 2.20 ppb |
| 2019 | 1.43 ppb | 48 | 48 | 0.460 ppb - 2.60 ppb |
| 2020 | 1.33 ppb | 24 | 24 | 0.390 ppb - 2.90 ppb |
| 2021 | 1.24 ppb | 24 | 24 | 0.360 ppb - 2.00 ppb |
| 2022 | 1.20 ppb | 24 | 23 | ND - 2.40 ppb |
| 2023 | 0.898 ppb | 24 | 17 | ND - 1.90 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 |
|---|---|---|
| 2018-03-07 | 35379177001 | 0.730 ppb |
| 2018-03-07 | 35379177002 | 1.70 ppb |
| 2018-03-07 | 35379177003 | 0.810 ppb |
| 2018-03-07 | 35379177004 | 0.620 ppb |
| 2018-03-07 | 35379177005 | 1.50 ppb |
| 2018-03-07 | 35379177006 | 0.710 ppb |
| 2018-03-07 | 35379177001 | 0.730 ppb |
| 2018-03-07 | 35379177002 | 1.70 ppb |
| 2018-03-07 | 35379177003 | 0.810 ppb |
| 2018-03-07 | 35379177004 | 0.620 ppb |
| 2018-03-07 | 35379177005 | 1.50 ppb |
| 2018-03-07 | 35379177006 | 0.710 ppb |
| 2018-06-13 | 35398741001 | 0.970 ppb |
| 2018-06-13 | 35398741002 | 1.30 ppb |
| 2018-06-13 | 35398741003 | 0.840 ppb |
| 2018-06-13 | 35398741004 | 0.850 ppb |
| 2018-06-13 | 35398741005 | 0.470 ppb |
| 2018-06-13 | 35398741006 | 1.20 ppb |
| 2018-06-13 | 35398741001 | 0.970 ppb |
| 2018-06-13 | 35398741002 | 1.30 ppb |
| 2018-06-13 | 35398741003 | 0.840 ppb |
| 2018-06-13 | 35398741004 | 0.850 ppb |
| 2018-06-13 | 35398741005 | 0.470 ppb |
| 2018-06-13 | 35398741006 | 1.20 ppb |
| 2018-09-04 | 35416221001 | 1.20 ppb |
| 2018-09-04 | 35416221002 | 0.900 ppb |
| 2018-09-04 | 35416221003 | 1.90 ppb |
| 2018-09-04 | 35416226001 | 2.20 ppb |
| 2018-09-04 | 35416226002 | 1.20 ppb |
| 2018-09-04 | 35416226003 | 1.70 ppb |
| 2018-09-04 | 35416221001 | 1.20 ppb |
| 2018-09-04 | 35416221002 | 0.900 ppb |
| 2018-09-04 | 35416221003 | 1.90 ppb |
| 2018-09-04 | 35416226001 | 2.20 ppb |
| 2018-09-04 | 35416226002 | 1.20 ppb |
| 2018-09-04 | 35416226003 | 1.70 ppb |
| 2018-12-12 | 35437374001 | 2.00 ppb |
| 2018-12-12 | 35437374002 | 1.70 ppb |
| 2018-12-12 | 35437374003 | 0.860 ppb |
| 2018-12-12 | 35437374004 | 0.900 ppb |
| 2018-12-12 | 35437374005 | 1.30 ppb |
| 2018-12-12 | 35437374006 | 0.730 ppb |
| 2018-12-12 | 35437374001 | 2.00 ppb |
| 2018-12-12 | 35437374002 | 1.70 ppb |
| 2018-12-12 | 35437374003 | 0.860 ppb |
| 2018-12-12 | 35437374004 | 0.900 ppb |
| 2018-12-12 | 35437374005 | 1.30 ppb |
| 2018-12-12 | 35437374006 | 0.730 ppb |
| 2019-03-11 | 35454715001 | 2.30 ppb |
| 2019-03-11 | 35454715002 | 0.980 ppb |
| 2019-03-11 | 35454716001 | 2.60 ppb |
| 2019-03-11 | 35454716002 | 0.740 ppb |
| 2019-03-11 | 35454716003 | 0.690 ppb |
| 2019-03-11 | 35454715001 | 2.30 ppb |
| 2019-03-11 | 35454715002 | 0.980 ppb |
| 2019-03-11 | 35454716001 | 2.60 ppb |
| 2019-03-11 | 35454716002 | 0.740 ppb |
| 2019-03-11 | 35454716003 | 0.690 ppb |
| 2019-03-14 | 35454715003 | 1.60 ppb |
| 2019-03-14 | 35454715003 | 1.60 ppb |
| 2019-06-03 | 35474282001 | 1.80 ppb |
| 2019-06-03 | 35474282002 | 0.960 ppb |
| 2019-06-03 | 35474282003 | 0.900 ppb |
| 2019-06-03 | 35474284001 | 2.20 ppb |
| 2019-06-03 | 35474284002 | 1.60 ppb |
| 2019-06-03 | 35474284003 | 0.940 ppb |
| 2019-06-03 | 35474282001 | 1.80 ppb |
| 2019-06-03 | 35474282002 | 0.960 ppb |
| 2019-06-03 | 35474282003 | 0.900 ppb |
| 2019-06-03 | 35474284001 | 2.20 ppb |
| 2019-06-03 | 35474284002 | 1.60 ppb |
| 2019-06-03 | 35474284003 | 0.940 ppb |
| 2019-09-03 | 35495824001 | 2.20 ppb |
| 2019-09-03 | 35495831001 | 2.30 ppb |
| 2019-09-03 | 35495831002 | 1.000 ppb |
| 2019-09-03 | 35495831003 | 0.550 ppb |
| 2019-09-03 | 35495824001 | 2.20 ppb |
| 2019-09-03 | 35495831001 | 2.30 ppb |
| 2019-09-03 | 35495831002 | 1.000 ppb |
| 2019-09-03 | 35495831003 | 0.550 ppb |
| 2019-09-26 | 35501131001 | 1.10 ppb |
| 2019-09-26 | 35501131002 | 1.70 ppb |
| 2019-09-26 | 35501131001 | 1.10 ppb |
| 2019-09-26 | 35501131002 | 1.70 ppb |
| 2019-12-02 | 35516981001 | 2.40 ppb |
| 2019-12-02 | 35516981002 | 1.000 ppb |
| 2019-12-02 | 35516981003 | 1.60 ppb |
| 2019-12-02 | 35516986001 | 2.00 ppb |
| 2019-12-02 | 35516986002 | 0.580 ppb |
| 2019-12-02 | 35516986003 | 0.460 ppb |
| 2019-12-02 | 35516981001 | 2.40 ppb |
| 2019-12-02 | 35516981002 | 1.000 ppb |
| 2019-12-02 | 35516981003 | 1.60 ppb |
| 2019-12-02 | 35516986001 | 2.00 ppb |
| 2019-12-02 | 35516986002 | 0.580 ppb |
| 2019-12-02 | 35516986003 | 0.460 ppb |
| 2020-03-12 | 35537457001 | 2.30 ppb |
| 2020-03-12 | 35537457002 | 2.00 ppb |
| 2020-03-12 | 35537457003 | 1.000 ppb |
| 2020-03-12 | 35537457004 | 1.30 ppb |
| 2020-03-12 | 35537457005 | 1.70 ppb |
| 2020-03-12 | 35537457006 | 0.690 ppb |
| 2020-06-04 | 35554631001 | 1.60 ppb |
| 2020-06-04 | 35554631002 | 2.20 ppb |
| 2020-06-04 | 35554631003 | 0.790 ppb |
| 2020-06-04 | 35554631004 | 0.760 ppb |
| 2020-06-04 | 35554631005 | 1.10 ppb |
| 2020-06-04 | 35554631006 | 0.390 ppb |
| 2020-09-25 | 35580612001 | 1.50 ppb |
| 2020-09-25 | 35580612002 | 1.40 ppb |
| 2020-09-25 | 35580612003 | 0.570 ppb |
| 2020-09-25 | 35580612004 | 1.20 ppb |
| 2020-09-25 | 35580612005 | 1.000 ppb |
| 2020-09-25 | 35580612006 | 0.440 ppb |
| 2020-12-04 | 35596660001 | 2.90 ppb |
| 2020-12-04 | 35596660002 | 2.50 ppb |
| 2020-12-04 | 35596660003 | 1.000 ppb |
| 2020-12-04 | 35596660004 | 1.20 ppb |
| 2020-12-04 | 35596660005 | 1.70 ppb |
| 2020-12-04 | 35596660006 | 0.740 ppb |
| 2021-03-29 | 35622529001 | 1.40 ppb |
| 2021-03-29 | 35622529002 | 1.50 ppb |
| 2021-03-29 | 35622529003 | 0.790 ppb |
| 2021-03-29 | 35622529004 | 0.740 ppb |
| 2021-03-29 | 35622529005 | 1.20 ppb |
| 2021-03-29 | 35622529006 | 0.410 ppb |
| 2021-06-23 | 35643508001 | 1.90 ppb |
| 2021-06-23 | 35643508002 | 2.00 ppb |
| 2021-06-23 | 35643508003 | 1.20 ppb |
| 2021-06-23 | 35643508004 | 1.20 ppb |
| 2021-06-23 | 35643508005 | 1.30 ppb |
| 2021-06-23 | 35643508006 | 0.490 ppb |
| 2021-09-09 | 35663633001 | 1.90 ppb |
| 2021-09-09 | 35663633002 | 1.90 ppb |
| 2021-09-09 | 35663633003 | 1.30 ppb |
| 2021-09-09 | 35663633004 | 1.000 ppb |
| 2021-09-09 | 35663633005 | 1.40 ppb |
| 2021-09-09 | 35663633006 | 0.990 ppb |
| 2021-12-17 | 35685396001 | 1.80 ppb |
| 2021-12-17 | 35685396002 | 1.60 ppb |
| 2021-12-17 | 35685396003 | 0.650 ppb |
| 2021-12-17 | 35685396004 | 0.930 ppb |
| 2021-12-17 | 35685396005 | 1.80 ppb |
| 2021-12-17 | 35685396006 | 0.360 ppb |
| 2022-03-17 | 35704944001 | 1.80 ppb |
| 2022-03-17 | 35704944002 | 1.60 ppb |
| 2022-03-17 | 35704944003 | 0.850 ppb |
| 2022-03-17 | 35704944004 | 1.10 ppb |
| 2022-03-17 | 35704944005 | 1.60 ppb |
| 2022-03-17 | 35704944006 | 0.630 ppb |
| 2022-06-02 | 35722448001 | 1.60 ppb |
| 2022-06-02 | 35722448002 | 1.70 ppb |
| 2022-06-02 | 35722448003 | 0.620 ppb |
| 2022-06-02 | 35722448004 | 0.840 ppb |
| 2022-06-02 | 35722448005 | 1.20 ppb |
| 2022-06-02 | 35722448006 | 0.390 ppb |
| 2022-09-09 | 35745863001 | 1.80 ppb |
| 2022-09-09 | 35745863002 | 1.50 ppb |
| 2022-09-09 | 35745863003 | 0.950 ppb |
| 2022-09-09 | 35745863004 | 0.780 ppb |
| 2022-09-09 | 35745863005 | 1.70 ppb |
| 2022-09-09 | 35745863006 | ND |
| 2022-12-09 | 35765897001 | 0.850 ppb |
| 2022-12-09 | 35765897002 | 2.40 ppb |
| 2022-12-09 | 35765897003 | 1.80 ppb |
| 2022-12-09 | 35765897004 | 2.00 ppb |
| 2022-12-09 | 35765897005 | 0.500 ppb |
| 2022-12-09 | 35765897006 | 0.550 ppb |
| 2023-03-17 | 35786901001 | 1.80 ppb |
| 2023-03-17 | 35786901002 | ND |
| 2023-03-17 | 35786901003 | ND |
| 2023-03-17 | 35786901004 | 1.30 ppb |
| 2023-03-17 | 35786901005 | ND |
| 2023-03-17 | 35786901006 | ND |
| 2023-06-28 | 35809733001 | 1.10 ppb |
| 2023-06-28 | 35809733002 | 1.50 ppb |
| 2023-06-28 | 35809733003 | ND |
| 2023-06-28 | 35809733004 | 0.630 ppb |
| 2023-06-28 | 35809733005 | 1.40 ppb |
| 2023-06-28 | 35809733006 | ND |
| 2023-09-12 | 35827904001 | 1.40 ppb |
| 2023-09-12 | 35827904002 | 1.90 ppb |
| 2023-09-12 | 35827904003 | 0.830 ppb |
| 2023-09-12 | 35827904004 | 1.000 ppb |
| 2023-09-12 | 35827904005 | 1.60 ppb |
| 2023-09-12 | 35827904006 | ND |
| 2023-12-05 | 35846836001 | 0.840 ppb |
| 2023-12-05 | 35846836002 | 1.70 ppb |
| 2023-12-05 | 35846836003 | 1.60 ppb |
| 2023-12-05 | 35846836004 | 1.70 ppb |
| 2023-12-05 | 35846836005 | 0.770 ppb |
| 2023-12-05 | 35846836006 | 0.480 ppb |