Trichloroacetic acid
City of Houston
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 5.73 ppb | 64 | 63 | ND - 13.0 ppb |
2015 | 7.41 ppb | 63 | 61 | ND - 21.5 ppb |
2016 | 6.04 ppb | 64 | 61 | ND - 16.9 ppb |
2017 | 4.70 ppb | 64 | 61 | ND - 8.30 ppb |
2018 | 6.08 ppb | 64 | 62 | ND - 10.5 ppb |
2019 | 6.39 ppb | 64 | 62 | ND - 11.9 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 |
---|---|---|
2014-03-05 | AC45667 | 9.80 ppb |
2014-03-05 | AC45666 | 9.00 ppb |
2014-03-05 | AC45649 | 6.50 ppb |
2014-03-05 | AC45663 | 9.90 ppb |
2014-03-05 | AC45650 | 7.70 ppb |
2014-03-05 | AC45652 | 5.70 ppb |
2014-03-05 | AC45687 | 8.50 ppb |
2014-03-05 | AC45688 | 1.000 ppb |
2014-03-05 | AC45662 | 8.00 ppb |
2014-03-05 | AC45665 | 13.0 ppb |
2014-03-05 | AC45651 | 6.50 ppb |
2014-03-05 | AC45669 | 9.30 ppb |
2014-03-05 | AC45648 | 7.30 ppb |
2014-03-06 | AC45965 | 7.70 ppb |
2014-03-06 | AC45943 | 8.30 ppb |
2014-03-06 | AC45968 | 8.80 ppb |
2014-05-19 | AC54558 | 5.50 ppb |
2014-05-19 | AC54559 | 6.40 ppb |
2014-05-19 | AC54574 | 5.20 ppb |
2014-05-19 | AC54560 | 5.10 ppb |
2014-05-19 | AC54566 | 6.20 ppb |
2014-05-19 | AC54552 | 5.50 ppb |
2014-05-19 | AC54556 | 4.80 ppb |
2014-05-19 | AC54563 | 6.30 ppb |
2014-05-19 | AC54553 | 6.30 ppb |
2014-05-19 | AC54568 | 6.50 ppb |
2014-05-20 | AC54716 | 5.40 ppb |
2014-05-20 | AC54748 | 4.70 ppb |
2014-05-20 | AC54708 | 3.90 ppb |
2014-05-20 | AC54719 | 4.50 ppb |
2014-05-20 | AC54715 | 5.20 ppb |
2014-05-20 | AC54713 | 1.90 ppb |
2014-07-15 | AC59753 | 6.60 ppb |
2014-07-15 | AC59757 | 5.60 ppb |
2014-07-15 | AC59754 | 8.90 ppb |
2014-07-15 | AC59755 | 7.20 ppb |
2014-07-15 | AC59752 | 8.00 ppb |
2014-07-15 | AC59749 | 8.00 ppb |
2014-07-15 | AC59770 | 6.30 ppb |
2014-07-15 | AC59769 | 6.70 ppb |
2014-07-15 | AC59750 | 8.70 ppb |
2014-07-15 | AC59751 | 8.20 ppb |
2014-07-15 | AC59756 | 8.20 ppb |
2014-07-16 | AC59879 | 4.80 ppb |
2014-07-16 | AC59878 | 5.40 ppb |
2014-07-16 | AC59892 | 4.80 ppb |
2014-07-16 | AC59893 | ND |
2014-07-16 | AC59897 | 5.80 ppb |
2014-12-18 | AC75440 | 2.90 ppb |
2014-12-18 | AC75453 | 3.20 ppb |
2014-12-18 | AC75448 | 3.20 ppb |
2014-12-18 | AC75446 | 2.90 ppb |
2014-12-18 | AC75451 | 2.70 ppb |
2014-12-18 | AC75447 | 2.70 ppb |
2014-12-19 | AC75631 | 3.90 ppb |
2014-12-19 | AC75628 | 2.70 ppb |
2014-12-19 | AC75649 | 3.90 ppb |
2014-12-19 | AC75637 | 2.70 ppb |
2014-12-19 | AC75645 | 3.60 ppb |
2014-12-19 | AC75629 | 3.00 ppb |
2014-12-19 | AC75625 | 3.70 ppb |
2014-12-19 | AC75626 | 4.00 ppb |
2014-12-19 | AC75638 | 4.10 ppb |
2014-12-19 | AC75633 | 3.60 ppb |
2015-03-04 | AC82676 | 3.80 ppb |
2015-03-04 | AC82679 | 3.90 ppb |
2015-03-04 | AC82733 | 4.30 ppb |
2015-03-04 | AC82669 | 3.70 ppb |
2015-03-04 | AC82675 | 4.00 ppb |
2015-03-04 | AC82671 | 4.00 ppb |
2015-03-04 | AC82728 | 3.90 ppb |
2015-03-04 | AC82667 | 3.80 ppb |
2015-03-04 | AC82672 | 4.10 ppb |
2015-03-04 | AC82668 | 4.20 ppb |
2015-03-04 | AC82664 | 4.20 ppb |
2015-03-04 | AC82673 | 3.80 ppb |
2015-03-05 | AC82712 | 2.60 ppb |
2015-03-05 | AC82708 | 2.80 ppb |
2015-03-05 | AC82707 | 2.20 ppb |
2015-03-05 | AC82688 | 5.00 ppb |
2015-06-16 | AC96151 | 13.2 ppb |
2015-06-16 | AC96154 | 12.3 ppb |
2015-06-16 | AC96145 | 14.5 ppb |
2015-06-16 | AC96139 | 10.9 ppb |
2015-06-16 | AC96142 | 12.0 ppb |
2015-06-16 | AC96137 | 12.9 ppb |
2015-06-16 | AC96155 | 12.5 ppb |
2015-06-16 | AC96150 | 14.0 ppb |
2015-06-16 | AC96138 | 13.0 ppb |
2015-06-17 | AC96243 | 17.6 ppb |
2015-06-17 | AC96260 | 19.9 ppb |
2015-06-17 | AC96262 | 21.5 ppb |
2015-06-17 | AC96274 | 19.5 ppb |
2015-06-17 | AC96273 | 19.8 ppb |
2015-06-17 | AC96265 | 17.4 ppb |
2015-09-16 | AD07294 | 3.80 ppb |
2015-09-16 | AD07297 | 6.20 ppb |
2015-09-16 | AD07293 | 6.80 ppb |
2015-09-16 | AD07312 | 5.30 ppb |
2015-09-16 | AD07313 | 5.10 ppb |
2015-09-16 | AD07304 | 6.50 ppb |
2015-09-16 | AD07302 | 5.10 ppb |
2015-09-16 | AD07311 | 3.80 ppb |
2015-09-16 | AD07292 | 5.90 ppb |
2015-09-16 | AD07329 | 6.40 ppb |
2015-09-16 | AD07327 | 4.50 ppb |
2015-09-17 | AD07537 | 4.00 ppb |
2015-09-17 | AD07538 | 4.20 ppb |
2015-09-17 | AD07563 | 4.10 ppb |
2015-09-17 | AD07536 | ND |
2015-09-17 | AD07546 | 5.10 ppb |
2015-11-16 | AD13562 | 8.90 ppb |
2015-11-16 | AD13618 | 9.30 ppb |
2015-11-16 | AD13561 | 4.90 ppb |
2015-11-16 | AD13559 | 7.30 ppb |
2015-11-16 | AD13619 | 8.50 ppb |
2015-11-16 | AD13558 | 8.60 ppb |
2015-11-16 | AD13565 | 4.70 ppb |
2015-11-16 | AD13556 | 10.4 ppb |
2015-11-16 | AD13557 | 8.10 ppb |
2015-11-16 | AD13560 | 5.80 ppb |
2015-11-17 | AD13768 | 4.40 ppb |
2015-11-17 | AD13773 | 5.20 ppb |
2015-11-17 | AD13767 | 4.60 ppb |
2015-11-17 | AD13772 | 5.20 ppb |
2015-11-17 | AD13771 | ND |
2015-11-17 | AD13766 | 3.00 ppb |
2016-03-16 | AD29018 | 6.40 ppb |
2016-03-16 | AD29033 | 6.20 ppb |
2016-03-16 | AD29030 | 8.50 ppb |
2016-03-16 | AD29037 | 9.20 ppb |
2016-03-16 | AD29019 | 6.60 ppb |
2016-03-16 | AD29027 | 5.70 ppb |
2016-03-16 | AD29029 | 8.50 ppb |
2016-03-16 | AD29036 | 7.20 ppb |
2016-03-16 | AD29032 | 5.00 ppb |
2016-03-16 | AD29026 | 7.50 ppb |
2016-03-17 | AD29319 | 10.5 ppb |
2016-03-17 | AD29323 | 10.00 ppb |
2016-03-17 | AD29322 | 8.40 ppb |
2016-03-17 | AD29318 | 10.7 ppb |
2016-03-17 | AD29320 | ND |
2016-03-17 | AD29321 | 9.40 ppb |
2016-06-15 | AD40718 | 12.9 ppb |
2016-06-15 | AD40714 | 8.80 ppb |
2016-06-15 | AD40722 | 10.5 ppb |
2016-06-15 | AD40725 | 9.20 ppb |
2016-06-15 | AD40726 | 12.4 ppb |
2016-06-15 | AD40716 | 9.50 ppb |
2016-06-15 | AD40719 | 13.8 ppb |
2016-06-15 | AD40710 | 8.40 ppb |
2016-06-15 | AD40730 | 13.9 ppb |
2016-06-15 | AD40727 | 9.40 ppb |
2016-06-15 | AD40720 | 13.1 ppb |
2016-06-15 | AD40717 | 9.50 ppb |
2016-06-16 | AD40972 | 9.10 ppb |
2016-06-16 | AD40971 | 7.90 ppb |
2016-06-16 | AD40964 | ND |
2016-06-16 | AD40968 | 16.9 ppb |
2016-09-20 | AD50324 | 4.60 ppb |
2016-09-20 | AD50327 | 4.00 ppb |
2016-09-20 | AD50330 | 3.70 ppb |
2016-09-20 | AD50329 | 3.60 ppb |
2016-09-20 | AD50325 | 3.50 ppb |
2016-09-20 | AD50328 | 3.90 ppb |
2016-09-20 | AD50326 | 3.30 ppb |
2016-09-21 | AD50707 | 3.70 ppb |
2016-09-21 | AD50686 | 6.30 ppb |
2016-09-21 | AD50697 | 3.40 ppb |
2016-09-21 | AD50708 | 3.70 ppb |
2016-09-21 | AD50712 | 4.00 ppb |
2016-09-21 | AD50710 | ND |
2016-09-21 | AD50696 | 3.80 ppb |
2016-09-21 | AD50706 | 3.60 ppb |
2016-09-21 | AD50695 | 3.80 ppb |
2016-11-17 | AD58543 | 2.60 ppb |
2016-11-17 | AD58538 | 3.20 ppb |
2016-11-17 | AD58539 | 4.30 ppb |
2016-11-17 | AD58536 | 2.90 ppb |
2016-11-17 | AD58544 | 2.30 ppb |
2016-11-17 | AD58545 | 2.50 ppb |
2016-11-18 | AD58825 | 2.60 ppb |
2016-11-18 | AD58817 | 2.70 ppb |
2016-11-18 | AD58820 | 2.50 ppb |
2016-11-18 | AD58816 | 1.80 ppb |
2016-11-18 | AD58818 | 2.50 ppb |
2016-11-18 | AD58815 | 1.70 ppb |
2016-11-18 | AD58819 | 2.30 ppb |
2016-11-18 | AD58814 | 2.00 ppb |
2016-11-21 | AD58774 | 3.30 ppb |
2016-11-21 | AD58775 | 3.30 ppb |
2017-02-28 | AD72422 | 5.10 ppb |
2017-02-28 | AD72419 | 5.00 ppb |
2017-02-28 | AD72424 | 3.60 ppb |
2017-02-28 | AD72399 | 4.10 ppb |
2017-02-28 | AD72421 | 4.60 ppb |
2017-02-28 | AD72420 | 4.30 ppb |
2017-02-28 | AD72398 | 4.00 ppb |
2017-02-28 | AD72418 | 4.60 ppb |
2017-02-28 | AD72423 | 5.70 ppb |
2017-02-28 | AD72397 | 4.10 ppb |
2017-03-01 | AD72739 | 3.60 ppb |
2017-03-01 | AD72742 | 3.50 ppb |
2017-03-01 | AD72745 | 3.60 ppb |
2017-03-01 | AD72737 | 3.70 ppb |
2017-03-01 | AD72740 | ND |
2017-03-01 | AD72738 | 3.90 ppb |
2017-04-26 | AD81142 | 4.50 ppb |
2017-04-26 | AD81144 | 3.40 ppb |
2017-04-26 | AD81139 | 4.00 ppb |
2017-04-26 | AD81140 | 3.80 ppb |
2017-04-26 | AD81136 | 4.80 ppb |
2017-04-26 | AD81135 | 4.30 ppb |
2017-04-26 | AD81143 | 4.50 ppb |
2017-04-26 | AD81141 | 3.30 ppb |
2017-04-26 | AD81145 | 3.40 ppb |
2017-04-26 | AD81146 | 3.60 ppb |
2017-04-26 | AD81137 | 4.40 ppb |
2017-04-26 | AD81138 | 4.40 ppb |
2017-04-27 | AD81479 | 4.30 ppb |
2017-04-27 | AD81475 | 3.90 ppb |
2017-04-27 | AD81478 | ND |
2017-04-27 | AD81477 | 3.80 ppb |
2017-07-25 | AD90530 | 5.30 ppb |
2017-07-25 | AD90522 | 8.30 ppb |
2017-07-25 | AD90525 | 7.50 ppb |
2017-07-25 | AD90543 | 5.40 ppb |
2017-07-25 | AD90545 | 5.50 ppb |
2017-07-25 | AD90544 | 6.40 ppb |
2017-07-25 | AD90523 | 6.20 ppb |
2017-07-25 | AD90532 | 6.20 ppb |
2017-07-25 | AD90524 | 6.80 ppb |
2017-07-25 | AD90531 | 7.60 ppb |
2017-07-25 | AD90521 | 4.60 ppb |
2017-07-26 | AD90799 | 5.50 ppb |
2017-07-26 | AD90804 | 4.40 ppb |
2017-07-26 | AD90796 | 5.70 ppb |
2017-07-26 | AD90797 | 2.30 ppb |
2017-07-26 | AD90802 | 4.90 ppb |
2017-11-15 | AE04936 | 5.70 ppb |
2017-11-15 | AE04933 | 6.30 ppb |
2017-11-15 | AE04925 | 6.60 ppb |
2017-11-15 | AE04930 | 6.10 ppb |
2017-11-15 | AE04931 | 3.70 ppb |
2017-11-15 | AE04924 | 6.30 ppb |
2017-11-15 | AE04926 | 5.60 ppb |
2017-11-15 | AE04927 | ND |
2017-11-15 | AE04929 | 5.30 ppb |
2017-11-15 | AE04935 | 6.80 ppb |
2017-11-15 | AE04928 | 5.80 ppb |
2017-11-15 | AE04934 | 7.80 ppb |
2017-11-15 | AE04932 | 5.30 ppb |
2017-11-16 | AE05180 | 4.40 ppb |
2017-11-16 | AE05181 | 4.30 ppb |
2017-11-16 | AE05182 | 4.40 ppb |
2018-02-07 | AE12988 | 5.30 ppb |
2018-02-07 | AE12993 | 5.00 ppb |
2018-02-07 | AE12992 | 5.70 ppb |
2018-02-07 | AE12989 | 7.70 ppb |
2018-02-07 | AE13012 | 6.20 ppb |
2018-02-07 | AE12952 | 4.90 ppb |
2018-02-07 | AE12999 | 5.50 ppb |
2018-02-07 | AE12958 | 7.00 ppb |
2018-02-08 | AE12996 | 5.10 ppb |
2018-02-08 | AE12990 | 4.50 ppb |
2018-02-08 | AE12963 | 4.20 ppb |
2018-02-08 | AE12991 | 5.70 ppb |
2018-02-08 | AE13014 | 1.70 ppb |
2018-02-08 | AE12997 | 6.10 ppb |
2018-02-08 | AE13010 | 7.60 ppb |
2018-02-08 | AE13011 | 6.10 ppb |
2018-04-17 | AE22960 | 10.1 ppb |
2018-04-17 | AE22998 | 10.2 ppb |
2018-04-17 | AE22956 | 10.5 ppb |
2018-04-17 | AE22955 | 9.00 ppb |
2018-04-17 | AE22996 | 7.50 ppb |
2018-04-17 | AE22961 | 8.90 ppb |
2018-04-17 | AE22953 | 9.30 ppb |
2018-04-17 | AE22994 | 9.20 ppb |
2018-04-17 | AE22959 | 8.70 ppb |
2018-04-18 | AE22995 | 8.90 ppb |
2018-04-18 | AE22958 | 8.40 ppb |
2018-04-18 | AE22962 | 7.40 ppb |
2018-04-18 | AE22966 | 7.20 ppb |
2018-04-18 | AE22965 | ND |
2018-04-18 | AE22954 | 9.80 ppb |
2018-05-22 | AE27203 | 8.40 ppb |
2018-08-28 | AE38800 | 4.30 ppb |
2018-08-28 | AE38798 | 3.40 ppb |
2018-08-28 | AE38793 | 3.20 ppb |
2018-08-28 | AE38807 | 3.80 ppb |
2018-08-28 | AE38796 | 4.70 ppb |
2018-08-28 | AE38805 | 3.60 ppb |
2018-08-28 | AE38803 | 4.40 ppb |
2018-08-28 | AE38792 | 3.00 ppb |
2018-08-28 | AE38799 | 4.40 ppb |
2018-08-28 | AE38797 | 3.60 ppb |
2018-08-28 | AE38794 | 4.60 ppb |
2018-08-28 | AE38795 | 4.30 ppb |
2018-08-29 | AE38802 | 3.60 ppb |
2018-08-29 | AE38806 | 3.80 ppb |
2018-08-29 | AE38801 | ND |
2018-08-29 | AE38804 | 4.10 ppb |
2018-11-13 | AE46051 | 6.90 ppb |
2018-11-13 | AE46052 | 6.80 ppb |
2018-11-13 | AE46033 | 7.80 ppb |
2018-11-13 | AE46049 | 6.70 ppb |
2018-11-13 | AE46044 | 6.80 ppb |
2018-11-13 | AE46050 | 9.00 ppb |
2018-11-13 | AE46045 | 6.00 ppb |
2018-11-13 | AE46055 | 7.70 ppb |
2018-11-13 | AE46037 | 7.50 ppb |
2018-11-13 | AE46054 | 8.90 ppb |
2018-11-13 | AE46038 | 3.30 ppb |
2018-11-13 | AE46039 | 7.40 ppb |
2018-11-14 | AE46042 | 6.50 ppb |
2018-11-14 | AE46043 | 5.80 ppb |
2018-11-14 | AE46058 | 1.80 ppb |
2018-11-14 | AE46053 | 9.30 ppb |
2019-01-15 | AE50125 | 8.20 ppb |
2019-01-15 | AE50069 | 9.00 ppb |
2019-01-15 | AE50072 | 10.9 ppb |
2019-01-15 | AE50068 | 10.5 ppb |
2019-01-15 | AE50067 | 7.80 ppb |
2019-01-15 | AE50075 | 8.90 ppb |
2019-01-15 | AE50084 | 11.3 ppb |
2019-01-15 | AE50070 | 9.00 ppb |
2019-01-15 | AE50071 | 4.50 ppb |
2019-01-15 | AE50093 | 10.00 ppb |
2019-01-16 | AE50087 | 9.70 ppb |
2019-01-16 | AE50074 | 9.60 ppb |
2019-01-16 | AE50088 | 9.70 ppb |
2019-01-16 | AE50080 | 9.10 ppb |
2019-01-16 | AE50073 | ND |
2019-01-16 | AE50126 | 11.9 ppb |
2019-04-10 | AE62008 | 5.80 ppb |
2019-04-10 | AE62027 | 5.90 ppb |
2019-04-10 | AE62002 | 6.00 ppb |
2019-04-10 | AE62030 | 4.70 ppb |
2019-04-10 | AE62006 | 5.80 ppb |
2019-04-10 | AE62007 | 5.10 ppb |
2019-04-10 | AE62019 | 7.50 ppb |
2019-04-10 | AE62020 | 6.30 ppb |
2019-04-10 | AE62029 | 3.40 ppb |
2019-04-10 | AE61994 | 3.90 ppb |
2019-04-11 | AE61988 | 5.90 ppb |
2019-04-11 | AE61985 | 7.20 ppb |
2019-04-11 | AE61983 | 4.60 ppb |
2019-04-11 | AE61984 | 4.40 ppb |
2019-04-11 | AE61986 | 2.10 ppb |
2019-04-11 | AE61987 | 7.40 ppb |
2019-07-24 | AE75953 | 4.30 ppb |
2019-07-24 | AE75954 | 5.70 ppb |
2019-07-24 | AE75952 | 6.00 ppb |
2019-07-24 | AE75955 | 5.90 ppb |
2019-07-24 | AE75951 | 5.60 ppb |
2019-07-24 | AE75949 | 5.10 ppb |
2019-07-24 | AE75950 | 4.30 ppb |
2019-07-24 | AE75944 | 6.30 ppb |
2019-07-24 | AE75945 | 4.40 ppb |
2019-07-24 | AE75956 | 4.10 ppb |
2019-07-25 | AE75909 | 6.70 ppb |
2019-07-25 | AE75904 | 5.80 ppb |
2019-07-25 | AE75910 | 6.40 ppb |
2019-07-25 | AE75906 | 5.40 ppb |
2019-07-25 | AE75943 | 2.50 ppb |
2019-07-25 | AE75942 | 4.60 ppb |
2019-10-09 | AE86125 | ND |
2019-10-09 | AE86124 | 8.60 ppb |
2019-10-09 | AE86127 | 6.10 ppb |
2019-10-09 | AE86128 | 8.50 ppb |
2019-10-09 | AE86126 | 8.20 ppb |
2019-10-09 | AE86122 | 8.70 ppb |
2019-10-09 | AE86121 | 9.10 ppb |
2019-10-09 | AE86129 | 6.40 ppb |
2019-10-09 | AE86123 | 5.80 ppb |
2019-10-10 | AE86286 | 4.90 ppb |
2019-10-10 | AE86282 | 5.70 ppb |
2019-10-10 | AE86285 | 5.30 ppb |
2019-10-10 | AE86281 | 7.10 ppb |
2019-10-10 | AE86283 | 3.00 ppb |
2019-10-10 | AE86284 | 5.60 ppb |
2019-10-10 | AE86287 | 6.80 ppb |