Trichloroacetic acid
Meriden Water Division
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 | 18.5 ppb | 53 | 53 | 2.30 ppb - 34.0 ppb |
| 2019 | 13.6 ppb | 56 | 56 | 1.70 ppb - 27.0 ppb |
| 2020 | 13.3 ppb | 56 | 56 | 2.70 ppb - 21.0 ppb |
| 2021 | 16.4 ppb | 53 | 52 | ND - 55.0 ppb |
| 2022 | 13.1 ppb | 56 | 55 | ND - 23.0 ppb |
| 2023 | 14.4 ppb | 56 | 56 | 1.90 ppb - 25.0 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 |
|---|---|---|
| 2018-02-08 | BZ86181HAA5 | 32.0 ppb |
| 2018-02-08 | BZ86182HAA5 | 34.0 ppb |
| 2018-02-08 | BZ86183HAA5 | 14.0 ppb |
| 2018-02-08 | BZ86184HAA5 | 17.0 ppb |
| 2018-02-08 | BZ86185HAA5 | 26.0 ppb |
| 2018-02-08 | BZ86186HAA5 | 2.30 ppb |
| 2018-02-08 | BZ86187HAA5 | 24.0 ppb |
| 2018-02-08 | BZ86188HAA5 | 30.0 ppb |
| 2018-03-12 | CA01226HAA5 | 18.0 ppb |
| 2018-03-12 | CA01227HAA5 | 13.0 ppb |
| 2018-03-12 | CA01228HAA5 | 15.0 ppb |
| 2018-04-12 | CA19004HAA5 | 16.0 ppb |
| 2018-04-12 | CA19005HAA5 | 17.0 ppb |
| 2018-04-12 | CA19006HAA5 | 18.0 ppb |
| 2018-05-10 | CA44958HAA5 | 14.0 ppb |
| 2018-05-10 | CA44959HAA5 | 20.0 ppb |
| 2018-05-10 | CA44960HAA5 | 7.60 ppb |
| 2018-05-10 | CA44961HAA5 | 13.0 ppb |
| 2018-05-10 | CA44962HAA5 | 25.0 ppb |
| 2018-05-10 | CA44963HAA5 | 2.60 ppb |
| 2018-05-10 | CA44964HAA5 | 14.0 ppb |
| 2018-05-10 | CA44965HAA5 | 17.0 ppb |
| 2018-06-07 | CA65949HAA5 | 19.0 ppb |
| 2018-06-07 | CA65950HAA5 | 16.0 ppb |
| 2018-06-07 | CA65951HAA5 | 16.0 ppb |
| 2018-07-12 | CA88491HAA5 | 18.0 ppb |
| 2018-07-12 | CA88492HAA5 | 20.0 ppb |
| 2018-07-12 | CA88493HAA5 | 19.0 ppb |
| 2018-08-09 | CB08267 | 26.0 ppb |
| 2018-08-09 | CB08268 | 22.0 ppb |
| 2018-08-09 | CB08269 | 9.60 ppb |
| 2018-08-09 | CB08270 | 19.0 ppb |
| 2018-08-09 | CB08271 | 21.0 ppb |
| 2018-08-09 | CB08272 | 14.0 ppb |
| 2018-08-09 | CB08273 | 20.0 ppb |
| 2018-08-09 | CB08274 | 15.0 ppb |
| 2018-09-13 | CB30717 | 24.0 ppb |
| 2018-09-13 | CB30718 | 26.0 ppb |
| 2018-09-13 | CB30719 | 21.0 ppb |
| 2018-10-11 | CB69876 | 19.0 ppb |
| 2018-10-11 | CB69877 | 21.0 ppb |
| 2018-10-11 | CB69878 | 19.0 ppb |
| 2018-11-14 | CB97384 | 18.0 ppb |
| 2018-11-14 | CB97385 | 16.0 ppb |
| 2018-11-14 | CB97386 | 32.0 ppb |
| 2018-11-14 | CB97387 | 12.0 ppb |
| 2018-11-20 | CC02615 | 17.0 ppb |
| 2018-11-20 | CC02616 | 21.0 ppb |
| 2018-11-20 | CC02617 | 18.0 ppb |
| 2018-11-20 | CC02618 | 17.0 ppb |
| 2018-12-12 | CC12839 | 18.0 ppb |
| 2018-12-12 | CC12840 | 17.0 ppb |
| 2018-12-12 | CC12841 | 18.0 ppb |
| 2019-01-09 | CC26159 | 17.0 ppb |
| 2019-01-09 | CC26160 | 18.0 ppb |
| 2019-01-09 | CC26161 | 15.0 ppb |
| 2019-02-13 | CC51440 | 11.0 ppb |
| 2019-02-13 | CC51441 | 13.0 ppb |
| 2019-02-13 | CC51442 | 6.60 ppb |
| 2019-02-13 | CC51443 | 14.0 ppb |
| 2019-02-13 | CC51444 | 13.0 ppb |
| 2019-02-13 | CC51445 | 1.70 ppb |
| 2019-02-13 | CC51446 | 10.00 ppb |
| 2019-02-13 | CC51447 | 14.0 ppb |
| 2019-03-13 | CC67336 | 9.60 ppb |
| 2019-03-13 | CC67337 | 8.20 ppb |
| 2019-03-13 | CC67338 | 11.0 ppb |
| 2019-04-10 | CC92173 | 9.20 ppb |
| 2019-04-10 | CC92174 | 7.90 ppb |
| 2019-04-10 | CC92175 | 18.0 ppb |
| 2019-05-08 | CD09263 | 12.0 ppb |
| 2019-05-08 | CD09264 | 9.70 ppb |
| 2019-05-08 | CD09265 | 9.90 ppb |
| 2019-05-08 | CD09266 | 13.0 ppb |
| 2019-05-08 | CD09267 | 13.0 ppb |
| 2019-05-08 | CD09268 | 7.20 ppb |
| 2019-05-08 | CD09269 | 16.0 ppb |
| 2019-05-08 | CD09270 | 11.0 ppb |
| 2019-06-12 | CD33213 | 12.0 ppb |
| 2019-06-12 | CD33214 | 11.0 ppb |
| 2019-06-12 | CD33215 | 15.0 ppb |
| 2019-07-10 | CD53538 | 16.0 ppb |
| 2019-07-10 | CD53539 | 14.0 ppb |
| 2019-07-10 | CD53540 | 14.0 ppb |
| 2019-08-14 | CD84984 | 19.0 ppb |
| 2019-08-14 | CD84985 | 19.0 ppb |
| 2019-08-14 | CD84986 | 8.60 ppb |
| 2019-08-14 | CD84987 | 15.0 ppb |
| 2019-08-14 | CD84988 | 16.0 ppb |
| 2019-08-14 | CD84989 | 2.20 ppb |
| 2019-08-14 | CD84990 | 19.0 ppb |
| 2019-08-14 | CD84991 | 9.70 ppb |
| 2019-09-11 | CE06528 | 25.0 ppb |
| 2019-09-11 | CE06529 | 27.0 ppb |
| 2019-09-11 | CE06530 | 16.0 ppb |
| 2019-10-09 | CE29947 | 18.0 ppb |
| 2019-10-09 | CE29948 | 21.0 ppb |
| 2019-10-09 | CE29949 | 17.0 ppb |
| 2019-11-14 | CE60570 | 16.0 ppb |
| 2019-11-14 | CE60571 | 17.0 ppb |
| 2019-11-14 | CE60572 | 11.0 ppb |
| 2019-11-14 | CE60573 | 18.0 ppb |
| 2019-11-14 | CE60574 | 17.0 ppb |
| 2019-11-14 | CE60575 | 2.60 ppb |
| 2019-11-14 | CE60576 | 15.0 ppb |
| 2019-11-14 | CE60577 | 9.30 ppb |
| 2019-12-11 | CE85082 | 17.0 ppb |
| 2019-12-11 | CE85083 | 18.0 ppb |
| 2019-12-11 | CE85084 | 17.0 ppb |
| 2020-01-31 | CF24539 | 16.0 ppb |
| 2020-01-31 | CF24540 | 17.0 ppb |
| 2020-01-31 | CF24541 | 15.0 ppb |
| 2020-02-19 | CF34503 | 16.0 ppb |
| 2020-02-19 | CF34504 | 16.0 ppb |
| 2020-02-19 | CF34505 | 11.0 ppb |
| 2020-02-19 | CF34506 | 3.70 ppb |
| 2020-02-19 | CF34507 | 12.0 ppb |
| 2020-02-19 | CF34508 | 2.70 ppb |
| 2020-02-19 | CF34509 | 13.0 ppb |
| 2020-02-19 | CF34510 | 12.0 ppb |
| 2020-03-16 | CF50882 | 15.0 ppb |
| 2020-03-16 | CF50883 | 13.0 ppb |
| 2020-03-16 | CF50884 | 14.0 ppb |
| 2020-04-08 | CF70494 | 14.0 ppb |
| 2020-04-08 | CF70495 | 16.0 ppb |
| 2020-04-08 | CF70496 | 15.0 ppb |
| 2020-05-20 | CF98466 | 16.0 ppb |
| 2020-05-20 | CF98467 | 5.30 ppb |
| 2020-05-20 | CF98468 | 14.0 ppb |
| 2020-05-20 | CF98469 | 5.30 ppb |
| 2020-05-20 | CF98470 | 13.0 ppb |
| 2020-05-21 | CF99453 | 17.0 ppb |
| 2020-05-21 | CF99454 | 9.80 ppb |
| 2020-05-21 | CF99455 | 16.0 ppb |
| 2020-06-10 | CG10480 | 14.0 ppb |
| 2020-06-10 | CG10481 | 14.0 ppb |
| 2020-06-10 | CG10482 | 16.0 ppb |
| 2020-07-15 | CG34276 | 15.0 ppb |
| 2020-07-15 | CG34277 | 16.0 ppb |
| 2020-07-15 | CG34278 | 13.0 ppb |
| 2020-08-12 | CG52360 | 19.0 ppb |
| 2020-08-12 | CG52361 | 17.0 ppb |
| 2020-08-12 | CG52362 | 13.0 ppb |
| 2020-08-12 | CG52363 | 8.10 ppb |
| 2020-08-12 | CG52364 | 14.0 ppb |
| 2020-08-12 | CG52365 | 12.0 ppb |
| 2020-08-12 | CG52366 | 15.0 ppb |
| 2020-08-12 | CG52367 | 8.70 ppb |
| 2020-09-09 | CG73199 | 14.0 ppb |
| 2020-09-09 | CG73200 | 15.0 ppb |
| 2020-09-09 | CG73201 | 13.0 ppb |
| 2020-10-14 | CG96690 | 19.0 ppb |
| 2020-10-14 | CG96691 | 18.0 ppb |
| 2020-10-14 | CG96692 | 13.0 ppb |
| 2020-11-12 | CH13749 | 21.0 ppb |
| 2020-11-12 | CH13750 | 20.0 ppb |
| 2020-11-12 | CH13751 | 6.00 ppb |
| 2020-11-12 | CH13752 | 13.0 ppb |
| 2020-11-12 | CH13753 | 14.0 ppb |
| 2020-11-12 | CH13754 | 8.00 ppb |
| 2020-11-12 | CH13755 | 10.00 ppb |
| 2020-11-12 | CH13756 | 12.0 ppb |
| 2020-12-09 | CH28026 | 14.0 ppb |
| 2020-12-09 | CH28027 | 14.0 ppb |
| 2020-12-09 | CH28028 | 8.10 ppb |
| 2021-01-13 | CH45536 | 14.0 ppb |
| 2021-01-13 | CH45537 | 13.0 ppb |
| 2021-01-13 | CH45538 | 15.0 ppb |
| 2021-02-04 | CH56876 | 18.0 ppb |
| 2021-02-04 | CH56877 | 17.0 ppb |
| 2021-02-04 | CH56878 | 16.0 ppb |
| 2021-02-04 | CH56879 | 13.0 ppb |
| 2021-02-04 | CH56880 | 15.0 ppb |
| 2021-02-04 | CH56881 | ND |
| 2021-02-04 | CH56882 | 17.0 ppb |
| 2021-02-04 | CH56883 | 16.0 ppb |
| 2021-03-17 | CH80218 | 14.0 ppb |
| 2021-03-17 | CH80219 | 15.0 ppb |
| 2021-03-17 | CH80220 | 11.0 ppb |
| 2021-04-14 | CH99106 | 13.0 ppb |
| 2021-04-14 | CH99107 | 13.0 ppb |
| 2021-04-14 | CH99108 | 9.30 ppb |
| 2021-05-05 | CI23778 | 12.0 ppb |
| 2021-05-05 | CI23779 | 12.0 ppb |
| 2021-05-05 | CI23780 | 8.60 ppb |
| 2021-05-05 | CI23781 | 7.40 ppb |
| 2021-05-05 | CI23782 | 8.30 ppb |
| 2021-05-05 | CI23783 | 4.40 ppb |
| 2021-05-05 | CI23784 | 14.0 ppb |
| 2021-05-05 | CI23785 | 6.80 ppb |
| 2021-06-16 | CI56522 | 16.0 ppb |
| 2021-06-16 | CI56523 | 17.0 ppb |
| 2021-06-16 | CI56524 | 12.0 ppb |
| 2021-08-25 | CJ13502 | 16.0 ppb |
| 2021-08-25 | CJ13503 | 16.0 ppb |
| 2021-08-25 | CJ13504 | 18.0 ppb |
| 2021-08-25 | CJ13505 | 13.0 ppb |
| 2021-08-25 | CJ13506 | 12.0 ppb |
| 2021-08-25 | CJ13507 | 12.0 ppb |
| 2021-08-25 | CJ13508 | 23.0 ppb |
| 2021-08-25 | CJ13509 | 16.0 ppb |
| 2021-09-15 | CJ28964 | 25.0 ppb |
| 2021-09-15 | CJ28965 | 28.0 ppb |
| 2021-09-15 | CJ28966 | 23.0 ppb |
| 2021-10-20 | CJ65919 | 21.0 ppb |
| 2021-10-20 | CJ65920 | 20.0 ppb |
| 2021-10-20 | CJ65921 | 19.0 ppb |
| 2021-11-17 | CJ79930 | 25.0 ppb |
| 2021-11-17 | CJ79931 | 25.0 ppb |
| 2021-11-17 | CJ79932 | 14.0 ppb |
| 2021-11-17 | CJ79933 | 25.0 ppb |
| 2021-11-17 | CJ79934 | 19.0 ppb |
| 2021-11-17 | CJ79935 | 3.10 ppb |
| 2021-11-17 | CJ79936 | 55.0 ppb |
| 2021-11-17 | CJ79937 | 23.0 ppb |
| 2021-12-15 | CJ98528 | 24.0 ppb |
| 2021-12-15 | CJ98529 | 23.0 ppb |
| 2021-12-15 | CJ98530 | 21.0 ppb |
| 2022-01-12 | CK14621 | 18.0 ppb |
| 2022-01-12 | CK14622 | 19.0 ppb |
| 2022-01-12 | CK14623 | 20.0 ppb |
| 2022-02-09 | CK33235 | 16.0 ppb |
| 2022-02-09 | CK33236 | 16.0 ppb |
| 2022-02-09 | CK33237 | 9.60 ppb |
| 2022-02-09 | CK33238 | 15.0 ppb |
| 2022-02-09 | CK33239 | 13.0 ppb |
| 2022-02-09 | CK33240 | ND |
| 2022-02-09 | CK33241 | 9.70 ppb |
| 2022-02-09 | CK33242 | 12.0 ppb |
| 2022-03-10 | CK83380 | 12.0 ppb |
| 2022-03-10 | CK83381 | 12.0 ppb |
| 2022-03-10 | CK83382 | 9.80 ppb |
| 2022-04-13 | CL07788 | 14.0 ppb |
| 2022-04-13 | CL07789 | 14.0 ppb |
| 2022-04-13 | CL07790 | 16.0 ppb |
| 2022-05-19 | CL34117 | 17.0 ppb |
| 2022-05-19 | CL34118 | 18.0 ppb |
| 2022-05-19 | CL34119 | 7.40 ppb |
| 2022-05-19 | CL34120 | 11.0 ppb |
| 2022-05-19 | CL34121 | 14.0 ppb |
| 2022-05-19 | CL34122 | 1.90 ppb |
| 2022-05-19 | CL34123 | 11.0 ppb |
| 2022-05-19 | CL34124 | 8.40 ppb |
| 2022-06-15 | CL56834 | 14.0 ppb |
| 2022-06-15 | CL56835 | 14.0 ppb |
| 2022-06-15 | CL56836 | 14.0 ppb |
| 2022-07-13 | CL76342 | 14.0 ppb |
| 2022-07-13 | CL76343 | 15.0 ppb |
| 2022-07-13 | CL76344 | 11.0 ppb |
| 2022-08-10 | CM01659 | 20.0 ppb |
| 2022-08-10 | CM01660 | 23.0 ppb |
| 2022-08-10 | CM01661 | 10.00 ppb |
| 2022-08-10 | CM01662 | 13.0 ppb |
| 2022-08-10 | CM01663 | 14.0 ppb |
| 2022-08-10 | CM01664 | 7.70 ppb |
| 2022-08-10 | CM01665 | 13.0 ppb |
| 2022-08-10 | CM01666 | 11.0 ppb |
| 2022-09-14 | CM30991 | 19.0 ppb |
| 2022-09-14 | CM30992 | 19.0 ppb |
| 2022-09-14 | CM30993 | 15.0 ppb |
| 2022-10-12 | CM60353 | 14.0 ppb |
| 2022-10-12 | CM60354 | 16.0 ppb |
| 2022-10-12 | CM60355 | 16.0 ppb |
| 2022-11-15 | CM87043 | 15.0 ppb |
| 2022-11-15 | CM87044 | 16.0 ppb |
| 2022-11-15 | CM87046 | 14.0 ppb |
| 2022-11-15 | CM87047 | 10.00 ppb |
| 2022-11-15 | CM87049 | 8.60 ppb |
| 2022-11-15 | CM87050 | 13.0 ppb |
| 2022-11-16 | CM87048 | 2.70 ppb |
| 2022-11-16 | CM87045 | 8.30 ppb |
| 2022-12-21 | CN09696 | 13.0 ppb |
| 2022-12-21 | CN09697 | 12.0 ppb |
| 2022-12-21 | CN09698 | 11.0 ppb |
| 2023-01-11 | CN21149 | 9.10 ppb |
| 2023-01-11 | CN21150 | 9.90 ppb |
| 2023-01-11 | CN21151 | 9.70 ppb |
| 2023-02-15 | CN43462 | 11.0 ppb |
| 2023-02-15 | CN43463 | 11.0 ppb |
| 2023-02-15 | CN43464 | 6.20 ppb |
| 2023-02-15 | CN43465 | 9.80 ppb |
| 2023-02-15 | CN43466 | 13.0 ppb |
| 2023-02-15 | CN43467 | 1.90 ppb |
| 2023-02-15 | CN43468 | 8.60 ppb |
| 2023-02-15 | CN43469 | 6.20 ppb |
| 2023-03-08 | CN55434 | 9.90 ppb |
| 2023-03-08 | CN55435 | 9.40 ppb |
| 2023-03-08 | CN55436 | 14.0 ppb |
| 2023-04-19 | CN86745 | 13.0 ppb |
| 2023-04-19 | CN86746 | 13.0 ppb |
| 2023-04-19 | CN86747 | 11.0 ppb |
| 2023-05-10 | CO02317 | 22.0 ppb |
| 2023-05-10 | CO02318 | 15.0 ppb |
| 2023-05-10 | CO02319 | 11.0 ppb |
| 2023-05-10 | CO02320 | 12.0 ppb |
| 2023-05-10 | CO02321 | 17.0 ppb |
| 2023-05-10 | CO02322 | 2.00 ppb |
| 2023-05-10 | CO02323 | 15.0 ppb |
| 2023-05-10 | CO02324 | 11.0 ppb |
| 2023-06-14 | CO27763 | 19.0 ppb |
| 2023-06-14 | CO27764 | 21.0 ppb |
| 2023-06-14 | CO27765 | 13.0 ppb |
| 2023-07-12 | CO48627 | 20.0 ppb |
| 2023-07-12 | CO48628 | 20.0 ppb |
| 2023-07-12 | CO48629 | 15.0 ppb |
| 2023-08-10 | CO71756 | 12.0 ppb |
| 2023-08-10 | CO71757 | 15.0 ppb |
| 2023-08-10 | CO71758 | 12.0 ppb |
| 2023-08-10 | CO71759 | 19.0 ppb |
| 2023-08-10 | CO71760 | 14.0 ppb |
| 2023-08-10 | CO71761 | 6.20 ppb |
| 2023-08-10 | CO71762 | 16.0 ppb |
| 2023-08-10 | CO71763 | 12.0 ppb |
| 2023-09-20 | CP04549 | 15.0 ppb |
| 2023-09-20 | CP04550 | 13.0 ppb |
| 2023-09-20 | CP04551 | 16.0 ppb |
| 2023-10-11 | CP22990 | 19.0 ppb |
| 2023-10-11 | CP22991 | 20.0 ppb |
| 2023-10-11 | CP22992 | 21.0 ppb |
| 2023-11-08 | CP43390 | 19.0 ppb |
| 2023-11-08 | CP43391 | 20.0 ppb |
| 2023-11-08 | CP43392 | 16.0 ppb |
| 2023-11-08 | CP43393 | 25.0 ppb |
| 2023-11-08 | CP43394 | 25.0 ppb |
| 2023-11-08 | CP43395 | 19.0 ppb |
| 2023-11-08 | CP43396 | 18.0 ppb |
| 2023-11-08 | CP43397 | 23.0 ppb |
| 2023-12-13 | CP66586 | 18.0 ppb |
| 2023-12-13 | CP66587 | 18.0 ppb |
| 2023-12-13 | CP66588 | 18.0 ppb |