Trichloroacetic acid
Lafayette Utilities Water 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.
288
Samples
0
Samples exceeding legal limit (MCL)
144
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.504 ppb | 48 | 20 | ND - 1.90 ppb |
| 2015 | 0.0750 ppb | 48 | 2 | ND - 1.80 ppb |
| 2016 | 0.386 ppb | 48 | 16 | ND - 1.90 ppb |
| 2017 | 0.385 ppb | 48 | 22 | ND - 1.30 ppb |
| 2018 | 0.951 ppb | 48 | 42 | ND - 2.70 ppb |
| 2019 | 1.03 ppb | 48 | 42 | ND - 2.70 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 |
|---|---|---|
| 2014-01-10 | L0038767-02 | ND |
| 2014-01-10 | L0038767-03 | 1.20 ppb |
| 2014-01-10 | L0038767-04 | 1.10 ppb |
| 2014-01-10 | L0038767-05 | ND |
| 2014-01-10 | L0038767-06 | 1.20 ppb |
| 2014-01-10 | L0038767-02 | ND |
| 2014-01-10 | L0038767-03 | 1.20 ppb |
| 2014-01-10 | L0038767-04 | 1.10 ppb |
| 2014-01-10 | L0038767-05 | ND |
| 2014-01-10 | L0038767-06 | 1.20 ppb |
| 2014-01-11 | L0038767-01 | 1.20 ppb |
| 2014-01-11 | L0038767-01 | 1.20 ppb |
| 2014-04-07 | L0041834-01 | 1.000 ppb |
| 2014-04-07 | L0041834-02 | ND |
| 2014-04-07 | L0041834-03 | ND |
| 2014-04-07 | L0041834-04 | 1.10 ppb |
| 2014-04-07 | L0041834-05 | 1.10 ppb |
| 2014-04-07 | L0041834-06 | 1.000 ppb |
| 2014-04-07 | L0041834-01 | 1.000 ppb |
| 2014-04-07 | L0041834-02 | ND |
| 2014-04-07 | L0041834-03 | ND |
| 2014-04-07 | L0041834-04 | 1.10 ppb |
| 2014-04-07 | L0041834-05 | 1.10 ppb |
| 2014-04-07 | L0041834-06 | 1.000 ppb |
| 2014-07-09 | L0045851-01 | 1.90 ppb |
| 2014-07-09 | L0045851-02 | ND |
| 2014-07-09 | L0045851-03 | ND |
| 2014-07-09 | L0045851-04 | ND |
| 2014-07-09 | L0045851-05 | ND |
| 2014-07-09 | L0045851-06 | ND |
| 2014-07-09 | L0045851-01 | 1.90 ppb |
| 2014-07-09 | L0045851-02 | ND |
| 2014-07-09 | L0045851-03 | ND |
| 2014-07-09 | L0045851-04 | ND |
| 2014-07-09 | L0045851-05 | ND |
| 2014-07-09 | L0045851-06 | ND |
| 2014-10-10 | L0049360-01 | 1.30 ppb |
| 2014-10-10 | L0049360-02 | ND |
| 2014-10-10 | L0049360-03 | ND |
| 2014-10-10 | L0049360-05 | ND |
| 2014-10-10 | L0049360-06 | ND |
| 2014-10-10 | L0049360-01 | 1.30 ppb |
| 2014-10-10 | L0049360-02 | ND |
| 2014-10-10 | L0049360-03 | ND |
| 2014-10-10 | L0049360-05 | ND |
| 2014-10-10 | L0049360-06 | ND |
| 2014-10-11 | L0049360-04 | ND |
| 2014-10-11 | L0049360-04 | ND |
| 2015-01-09 | L0052948-01 | ND |
| 2015-01-09 | L0052948-04 | ND |
| 2015-01-09 | L0052948-06 | ND |
| 2015-01-09 | L0052948-01 | ND |
| 2015-01-09 | L0052948-04 | ND |
| 2015-01-09 | L0052948-06 | ND |
| 2015-01-10 | L0052948-02 | ND |
| 2015-01-10 | L0052948-03 | ND |
| 2015-01-10 | L0052948-05 | ND |
| 2015-01-10 | L0052948-02 | ND |
| 2015-01-10 | L0052948-03 | ND |
| 2015-01-10 | L0052948-05 | ND |
| 2015-04-10 | LA5900-3 | ND |
| 2015-04-10 | LA5900-4 | ND |
| 2015-04-10 | LA5900-5 | ND |
| 2015-04-10 | LA5900-6 | ND |
| 2015-04-10 | LA5900-3 | ND |
| 2015-04-10 | LA5900-4 | ND |
| 2015-04-10 | LA5900-5 | ND |
| 2015-04-10 | LA5900-6 | ND |
| 2015-04-11 | LA5900-1 | ND |
| 2015-04-11 | LA5900-2 | ND |
| 2015-04-11 | LA5900-1 | ND |
| 2015-04-11 | LA5900-2 | ND |
| 2015-07-14 | LA9484-1 | ND |
| 2015-07-14 | LA9484-2 | ND |
| 2015-07-14 | LA9484-3 | ND |
| 2015-07-14 | LA9484-4 | ND |
| 2015-07-14 | LA9484-5 | ND |
| 2015-07-14 | LA9484-6 | ND |
| 2015-07-14 | LA9484-1 | ND |
| 2015-07-14 | LA9484-2 | ND |
| 2015-07-14 | LA9484-3 | ND |
| 2015-07-14 | LA9484-4 | ND |
| 2015-07-14 | LA9484-5 | ND |
| 2015-07-14 | LA9484-6 | ND |
| 2015-10-12 | LA12747-1 | 1.80 ppb |
| 2015-10-12 | LA12747-2 | ND |
| 2015-10-12 | LA12747-3 | ND |
| 2015-10-12 | LA12747-4 | ND |
| 2015-10-12 | LA12747-5 | ND |
| 2015-10-12 | LA12747-6 | ND |
| 2015-10-12 | LA12747-1 | 1.80 ppb |
| 2015-10-12 | LA12747-2 | ND |
| 2015-10-12 | LA12747-3 | ND |
| 2015-10-12 | LA12747-4 | ND |
| 2015-10-12 | LA12747-5 | ND |
| 2015-10-12 | LA12747-6 | ND |
| 2016-01-11 | LA16317-1 | ND |
| 2016-01-11 | LA16317-2 | ND |
| 2016-01-11 | LA16317-3 | 0.810 ppb |
| 2016-01-11 | LA16317-4 | ND |
| 2016-01-11 | LA16317-5 | ND |
| 2016-01-11 | LA16317-6 | ND |
| 2016-01-11 | LA16317-1 | ND |
| 2016-01-11 | LA16317-2 | ND |
| 2016-01-11 | LA16317-3 | 0.810 ppb |
| 2016-01-11 | LA16317-4 | ND |
| 2016-01-11 | LA16317-5 | ND |
| 2016-01-11 | LA16317-6 | ND |
| 2016-04-11 | LA19308-1 | 1.10 ppb |
| 2016-04-11 | LA19308-2 | ND |
| 2016-04-11 | LA19308-3 | ND |
| 2016-04-11 | LA19308-4 | 1.10 ppb |
| 2016-04-11 | LA19308-5 | 1.90 ppb |
| 2016-04-11 | LA19308-6 | 1.000 ppb |
| 2016-04-11 | LA19308-1 | 1.10 ppb |
| 2016-04-11 | LA19308-2 | ND |
| 2016-04-11 | LA19308-3 | ND |
| 2016-04-11 | LA19308-4 | 1.10 ppb |
| 2016-04-11 | LA19308-5 | 1.90 ppb |
| 2016-04-11 | LA19308-6 | 1.000 ppb |
| 2016-07-12 | LA22986-1 | ND |
| 2016-07-12 | LA22986-2 | ND |
| 2016-07-12 | LA22986-3 | ND |
| 2016-07-12 | LA22986-4 | ND |
| 2016-07-12 | LA22986-5 | 0.960 ppb |
| 2016-07-12 | LA22986-6 | ND |
| 2016-07-12 | LA22986-1 | ND |
| 2016-07-12 | LA22986-2 | ND |
| 2016-07-12 | LA22986-3 | ND |
| 2016-07-12 | LA22986-4 | ND |
| 2016-07-12 | LA22986-5 | 0.960 ppb |
| 2016-07-12 | LA22986-6 | ND |
| 2016-10-12 | LA26681-1 | 1.000 ppb |
| 2016-10-12 | LA26681-2 | ND |
| 2016-10-12 | LA26681-3 | ND |
| 2016-10-12 | LA26681-4 | ND |
| 2016-10-12 | LA26681-5 | 1.40 ppb |
| 2016-10-12 | LA26681-6 | ND |
| 2016-10-12 | LA26681-1 | 1.000 ppb |
| 2016-10-12 | LA26681-2 | ND |
| 2016-10-12 | LA26681-3 | ND |
| 2016-10-12 | LA26681-4 | ND |
| 2016-10-12 | LA26681-5 | 1.40 ppb |
| 2016-10-12 | LA26681-6 | ND |
| 2017-01-12 | 35289032001 | ND |
| 2017-01-12 | 35289032002 | ND |
| 2017-01-12 | 35289032003 | ND |
| 2017-01-12 | 35289032004 | ND |
| 2017-01-12 | 35289032001 | ND |
| 2017-01-12 | 35289032002 | ND |
| 2017-01-12 | 35289032003 | ND |
| 2017-01-12 | 35289032004 | ND |
| 2017-01-13 | 35289034001 | 1.30 ppb |
| 2017-01-13 | 35289034002 | ND |
| 2017-01-13 | 35289034001 | 1.30 ppb |
| 2017-01-13 | 35289034002 | ND |
| 2017-04-13 | 35306502001 | 0.610 ppb |
| 2017-04-13 | 35306502002 | ND |
| 2017-04-13 | 35306502003 | ND |
| 2017-04-13 | 35306502004 | ND |
| 2017-04-13 | 35306502005 | 0.790 ppb |
| 2017-04-13 | 35306502006 | ND |
| 2017-04-13 | 35306502001 | 0.610 ppb |
| 2017-04-13 | 35306502002 | ND |
| 2017-04-13 | 35306502003 | ND |
| 2017-04-13 | 35306502004 | ND |
| 2017-04-13 | 35306502005 | 0.790 ppb |
| 2017-04-13 | 35306502006 | ND |
| 2017-07-13 | 35324177015 | 0.590 ppb |
| 2017-07-13 | 35324177016 | ND |
| 2017-07-13 | 35324177017 | ND |
| 2017-07-13 | 35324177018 | ND |
| 2017-07-13 | 35324177019 | 0.800 ppb |
| 2017-07-13 | 35324177020 | 0.600 ppb |
| 2017-07-13 | 35324177015 | 0.590 ppb |
| 2017-07-13 | 35324177016 | ND |
| 2017-07-13 | 35324177017 | ND |
| 2017-07-13 | 35324177018 | ND |
| 2017-07-13 | 35324177019 | 0.800 ppb |
| 2017-07-13 | 35324177020 | 0.600 ppb |
| 2017-10-06 | 35340512001 | 0.930 ppb |
| 2017-10-06 | 35340512002 | ND |
| 2017-10-06 | 35340512003 | 1.000 ppb |
| 2017-10-06 | 35340512004 | 0.920 ppb |
| 2017-10-06 | 35340512005 | 1.000 ppb |
| 2017-10-06 | 35340512006 | 0.690 ppb |
| 2017-10-06 | 35340512001 | 0.930 ppb |
| 2017-10-06 | 35340512002 | ND |
| 2017-10-06 | 35340512003 | 1.000 ppb |
| 2017-10-06 | 35340512004 | 0.920 ppb |
| 2017-10-06 | 35340512005 | 1.000 ppb |
| 2017-10-06 | 35340512006 | 0.690 ppb |
| 2018-01-12 | 35368396001 | 0.790 ppb |
| 2018-01-12 | 35368396002 | ND |
| 2018-01-12 | 35368396003 | ND |
| 2018-01-12 | 35368396004 | ND |
| 2018-01-12 | 35368396005 | 1.90 ppb |
| 2018-01-12 | 35368396006 | 1.80 ppb |
| 2018-01-12 | 35368396001 | 0.790 ppb |
| 2018-01-12 | 35368396002 | ND |
| 2018-01-12 | 35368396003 | ND |
| 2018-01-12 | 35368396004 | ND |
| 2018-01-12 | 35368396005 | 1.90 ppb |
| 2018-01-12 | 35368396006 | 1.80 ppb |
| 2018-04-05 | 35384677001 | 1.20 ppb |
| 2018-04-05 | 35384677002 | 0.760 ppb |
| 2018-04-05 | 35384677003 | 0.730 ppb |
| 2018-04-05 | 35384677004 | 1.10 ppb |
| 2018-04-05 | 35384677005 | 2.70 ppb |
| 2018-04-05 | 35384677006 | 0.730 ppb |
| 2018-04-05 | 35384677001 | 1.20 ppb |
| 2018-04-05 | 35384677002 | 0.760 ppb |
| 2018-04-05 | 35384677003 | 0.730 ppb |
| 2018-04-05 | 35384677004 | 1.10 ppb |
| 2018-04-05 | 35384677005 | 2.70 ppb |
| 2018-04-05 | 35384677006 | 0.730 ppb |
| 2018-07-31 | 35407898001 | 1.40 ppb |
| 2018-07-31 | 35407898002 | 0.820 ppb |
| 2018-07-31 | 35407898003 | 0.820 ppb |
| 2018-07-31 | 35407898004 | 1.40 ppb |
| 2018-07-31 | 35407898005 | 0.820 ppb |
| 2018-07-31 | 35407898006 | 0.810 ppb |
| 2018-07-31 | 35407898001 | 1.40 ppb |
| 2018-07-31 | 35407898002 | 0.820 ppb |
| 2018-07-31 | 35407898003 | 0.820 ppb |
| 2018-07-31 | 35407898004 | 1.40 ppb |
| 2018-07-31 | 35407898005 | 0.820 ppb |
| 2018-07-31 | 35407898006 | 0.810 ppb |
| 2018-10-18 | 35425428001 | 1.20 ppb |
| 2018-10-18 | 35425428002 | 0.450 ppb |
| 2018-10-18 | 35425428003 | 0.440 ppb |
| 2018-10-18 | 35425428004 | 0.770 ppb |
| 2018-10-18 | 35425428005 | 1.40 ppb |
| 2018-10-18 | 35425428006 | 0.780 ppb |
| 2018-10-18 | 35425428001 | 1.20 ppb |
| 2018-10-18 | 35425428002 | 0.450 ppb |
| 2018-10-18 | 35425428003 | 0.440 ppb |
| 2018-10-18 | 35425428004 | 0.770 ppb |
| 2018-10-18 | 35425428005 | 1.40 ppb |
| 2018-10-18 | 35425428006 | 0.780 ppb |
| 2019-01-10 | 35441863001 | 1.40 ppb |
| 2019-01-10 | 35441863002 | 0.880 ppb |
| 2019-01-10 | 35441863003 | 0.660 ppb |
| 2019-01-10 | 35441863004 | 1.20 ppb |
| 2019-01-10 | 35441863005 | 1.80 ppb |
| 2019-01-10 | 35441863006 | 1.30 ppb |
| 2019-01-10 | 35441863001 | 1.40 ppb |
| 2019-01-10 | 35441863002 | 0.880 ppb |
| 2019-01-10 | 35441863003 | 0.660 ppb |
| 2019-01-10 | 35441863004 | 1.20 ppb |
| 2019-01-10 | 35441863005 | 1.80 ppb |
| 2019-01-10 | 35441863006 | 1.30 ppb |
| 2019-04-11 | 35461551001 | 1.40 ppb |
| 2019-04-11 | 35461551002 | 0.650 ppb |
| 2019-04-11 | 35461551003 | 0.650 ppb |
| 2019-04-11 | 35461551004 | 0.940 ppb |
| 2019-04-11 | 35461551005 | 2.70 ppb |
| 2019-04-11 | 35461551006 | 0.910 ppb |
| 2019-04-11 | 35461551001 | 1.40 ppb |
| 2019-04-11 | 35461551002 | 0.650 ppb |
| 2019-04-11 | 35461551003 | 0.650 ppb |
| 2019-04-11 | 35461551004 | 0.940 ppb |
| 2019-04-11 | 35461551005 | 2.70 ppb |
| 2019-04-11 | 35461551006 | 0.910 ppb |
| 2019-07-19 | 35483795001 | 1.40 ppb |
| 2019-07-19 | 35483795002 | ND |
| 2019-07-19 | 35483795003 | ND |
| 2019-07-19 | 35483795004 | 0.810 ppb |
| 2019-07-19 | 35483795005 | 2.20 ppb |
| 2019-07-19 | 35483795006 | 0.840 ppb |
| 2019-07-19 | 35483795001 | 1.40 ppb |
| 2019-07-19 | 35483795002 | ND |
| 2019-07-19 | 35483795003 | ND |
| 2019-07-19 | 35483795004 | 0.810 ppb |
| 2019-07-19 | 35483795005 | 2.20 ppb |
| 2019-07-19 | 35483795006 | 0.840 ppb |
| 2019-10-18 | 35506260001 | 1.30 ppb |
| 2019-10-18 | 35506260002 | 0.430 ppb |
| 2019-10-18 | 35506260003 | ND |
| 2019-10-18 | 35506260004 | 0.710 ppb |
| 2019-10-18 | 35506260005 | 2.00 ppb |
| 2019-10-18 | 35506260006 | 0.570 ppb |
| 2019-10-18 | 35506260001 | 1.30 ppb |
| 2019-10-18 | 35506260002 | 0.430 ppb |
| 2019-10-18 | 35506260003 | ND |
| 2019-10-18 | 35506260004 | 0.710 ppb |
| 2019-10-18 | 35506260005 | 2.00 ppb |
| 2019-10-18 | 35506260006 | 0.570 ppb |