Chloroform
City of Corpus Christi
Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.
In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 10.4 ppb | 49 | 49 | 7.30 ppb - 18.5 ppb |
2015 | 14.4 ppb | 49 | 49 | 5.40 ppb - 24.6 ppb |
2016 | 9.36 ppb | 49 | 49 | 6.40 ppb - 13.2 ppb |
2017 | 8.16 ppb | 53 | 53 | 2.80 ppb - 52.0 ppb |
2018 | 4.98 ppb | 50 | 50 | 2.40 ppb - 7.50 ppb |
2019 | 8.30 ppb | 50 | 50 | 1.60 ppb - 16.1 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.4 ppb
The EWG Health Guideline of 0.4 ppb for chloroform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as 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 |
---|---|---|
2014-03-24 | AC48212 | 8.00 ppb |
2014-03-24 | AC48208 | 7.90 ppb |
2014-03-24 | AC48214 | 7.50 ppb |
2014-03-24 | AC48210 | 7.60 ppb |
2014-03-24 | AC48225 | 7.80 ppb |
2014-03-24 | AC48211 | 7.70 ppb |
2014-03-24 | AC48215 | 7.70 ppb |
2014-03-24 | AC48209 | 8.00 ppb |
2014-03-24 | AC48216 | 7.50 ppb |
2014-03-24 | AC48207 | 7.70 ppb |
2014-03-24 | AC48213 | 7.70 ppb |
2014-03-24 | AC48226 | 8.40 ppb |
2014-05-21 | AC54959 | 8.30 ppb |
2014-05-21 | AC54963 | 8.00 ppb |
2014-05-21 | AC54968 | 8.00 ppb |
2014-05-21 | AC54969 | 7.30 ppb |
2014-05-21 | AC54974 | 8.30 ppb |
2014-05-21 | AC54958 | 7.80 ppb |
2014-05-21 | AC54961 | 9.10 ppb |
2014-05-21 | AC54960 | 7.90 ppb |
2014-05-21 | AC54957 | 7.70 ppb |
2014-05-21 | AC54973 | 8.30 ppb |
2014-05-21 | AC54970 | 8.20 ppb |
2014-05-21 | AC54962 | 7.90 ppb |
2014-08-07 | AC62550 | 15.0 ppb |
2014-08-07 | AC62633 | 17.3 ppb |
2014-08-07 | AC62642 | 16.9 ppb |
2014-08-07 | AC62634 | 17.3 ppb |
2014-08-07 | AC62650 | 14.9 ppb |
2014-08-07 | AC62644 | 16.4 ppb |
2014-08-07 | AC62647 | 13.9 ppb |
2014-08-07 | AC62658 | 16.6 ppb |
2014-08-07 | AC62632 | 18.5 ppb |
2014-08-07 | AC62646 | 16.8 ppb |
2014-08-07 | AC62649 | 14.3 ppb |
2014-08-07 | AC62660 | 15.4 ppb |
2014-08-07 | AC62630 | 16.9 ppb |
2014-11-14 | AC72154 | 7.70 ppb |
2014-11-14 | AC72123 | 8.60 ppb |
2014-11-14 | AC72155 | 7.90 ppb |
2014-11-14 | AC72127 | 9.20 ppb |
2014-11-14 | AC72152 | 8.40 ppb |
2014-11-14 | AC72156 | 8.10 ppb |
2014-11-14 | AC72187 | 12.6 ppb |
2014-11-14 | AC72178 | 7.70 ppb |
2014-11-14 | AC72126 | 8.90 ppb |
2014-11-14 | AC72125 | 9.40 ppb |
2014-11-14 | AC72188 | 14.2 ppb |
2014-11-14 | AC72153 | 7.30 ppb |
2015-02-17 | AC80688 | 7.90 ppb |
2015-02-17 | AC80685 | 8.00 ppb |
2015-02-17 | AC80683 | 7.50 ppb |
2015-02-17 | AC80679 | 7.90 ppb |
2015-02-17 | AC80689 | 6.10 ppb |
2015-02-17 | AC80686 | 8.80 ppb |
2015-02-17 | AC80697 | 9.50 ppb |
2015-02-17 | AC80696 | 11.5 ppb |
2015-02-17 | AC80690 | 7.30 ppb |
2015-02-17 | AC80684 | 6.40 ppb |
2015-02-17 | AC80695 | 10.6 ppb |
2015-02-17 | AC80687 | 6.90 ppb |
2015-04-21 | AC89004 | 22.5 ppb |
2015-04-21 | AC88996 | 23.0 ppb |
2015-04-21 | AC89002 | 22.1 ppb |
2015-04-21 | AC89001 | 16.1 ppb |
2015-04-21 | AC89000 | 23.0 ppb |
2015-04-21 | AC88992 | 21.8 ppb |
2015-04-21 | AC88994 | 22.4 ppb |
2015-04-21 | AC88995 | 23.9 ppb |
2015-04-21 | AC88997 | 23.8 ppb |
2015-04-21 | AC88998 | 20.7 ppb |
2015-04-21 | AC88999 | 22.2 ppb |
2015-04-21 | AC88993 | 22.0 ppb |
2015-08-13 | AD04130 | 22.0 ppb |
2015-08-13 | AD04040 | 23.1 ppb |
2015-08-13 | AD04084 | 16.9 ppb |
2015-08-13 | AD04085 | 21.0 ppb |
2015-08-13 | AD04039 | 22.1 ppb |
2015-08-13 | AD04055 | 16.0 ppb |
2015-08-13 | AD04044 | 21.0 ppb |
2015-08-13 | AD04043 | 22.6 ppb |
2015-08-13 | AD04042 | 22.8 ppb |
2015-08-13 | AD04041 | 24.6 ppb |
2015-08-13 | AD04054 | 14.0 ppb |
2015-08-13 | AD04047 | 21.9 ppb |
2015-08-13 | AD04045 | 19.9 ppb |
2015-11-30 | AD14713 | 7.00 ppb |
2015-11-30 | AD14711 | 6.00 ppb |
2015-11-30 | AD14696 | 6.60 ppb |
2015-11-30 | AD14716 | 6.70 ppb |
2015-11-30 | AD14719 | 5.40 ppb |
2015-11-30 | AD14710 | 7.40 ppb |
2015-11-30 | AD14718 | 5.90 ppb |
2015-11-30 | AD14717 | 6.40 ppb |
2015-11-30 | AD14715 | 6.60 ppb |
2015-11-30 | AD14697 | 6.10 ppb |
2015-11-30 | AD14712 | 6.40 ppb |
2015-11-30 | AD14714 | 6.70 ppb |
2016-02-10 | AD22991 | 7.80 ppb |
2016-02-10 | AD22985 | 8.90 ppb |
2016-02-10 | AD22986 | 7.50 ppb |
2016-02-10 | AD22989 | 6.40 ppb |
2016-02-10 | AD22988 | 7.90 ppb |
2016-02-10 | AD22987 | 7.60 ppb |
2016-02-10 | AD22993 | 7.60 ppb |
2016-02-10 | AD22992 | 7.50 ppb |
2016-02-10 | AD22983 | 7.60 ppb |
2016-02-10 | AD22982 | 8.20 ppb |
2016-02-10 | AD22984 | 7.10 ppb |
2016-02-10 | AD22990 | 7.80 ppb |
2016-04-14 | AD33147 | 7.00 ppb |
2016-04-14 | AD33150 | 7.80 ppb |
2016-04-14 | AD33156 | 6.90 ppb |
2016-04-14 | AD33149 | 6.70 ppb |
2016-04-14 | AD33148 | 7.60 ppb |
2016-04-14 | AD33152 | 8.00 ppb |
2016-04-14 | AD33155 | 7.30 ppb |
2016-04-14 | AD33151 | 6.70 ppb |
2016-04-14 | AD33153 | 6.80 ppb |
2016-04-14 | AD33146 | 8.50 ppb |
2016-04-14 | AD33154 | 6.90 ppb |
2016-04-14 | AD33145 | 6.40 ppb |
2016-09-14 | AD49468 | 10.00 ppb |
2016-09-14 | AD49369 | 11.5 ppb |
2016-09-14 | AD49366 | 11.7 ppb |
2016-09-14 | AD49370 | 12.8 ppb |
2016-09-14 | AD49359 | 10.8 ppb |
2016-09-14 | AD49362 | 11.8 ppb |
2016-09-14 | AD49368 | 10.5 ppb |
2016-09-14 | AD49363 | 11.3 ppb |
2016-09-14 | AD49367 | 12.2 ppb |
2016-09-14 | AD49360 | 9.40 ppb |
2016-09-14 | AD49365 | 12.0 ppb |
2016-09-14 | AD49361 | 10.1 ppb |
2016-09-14 | AD49364 | 12.1 ppb |
2016-11-08 | AD57061 | 10.9 ppb |
2016-11-08 | AD57069 | 8.80 ppb |
2016-11-08 | AD57056 | 12.2 ppb |
2016-11-08 | AD57063 | 10.9 ppb |
2016-11-08 | AD57062 | 11.7 ppb |
2016-11-08 | AD57065 | 9.10 ppb |
2016-11-08 | AD57068 | 12.0 ppb |
2016-11-08 | AD57060 | 12.7 ppb |
2016-11-08 | AD57059 | 13.2 ppb |
2016-11-08 | AD57057 | 9.50 ppb |
2016-11-08 | AD57055 | 11.1 ppb |
2016-11-08 | AD57064 | 11.7 ppb |
2017-01-18 | AD65327 | 11.5 ppb |
2017-01-18 | AD65326 | 8.90 ppb |
2017-01-18 | AD65325 | 10.9 ppb |
2017-01-18 | AD65324 | 10.6 ppb |
2017-01-18 | AD65337 | 11.1 ppb |
2017-01-18 | AD65336 | 10.6 ppb |
2017-01-18 | AD65335 | 12.5 ppb |
2017-01-18 | AD65350 | 12.0 ppb |
2017-01-18 | AD65351 | 10.4 ppb |
2017-01-18 | AD65328 | 11.3 ppb |
2017-01-18 | AD65331 | 11.6 ppb |
2017-01-18 | AD65333 | 10.2 ppb |
2017-03-21 | AD76053 | 52.0 ppb |
2017-05-16 | AD84432 | 6.80 ppb |
2017-05-16 | AD84426 | 7.60 ppb |
2017-05-16 | AD84429 | 7.30 ppb |
2017-05-16 | AD84424 | 9.40 ppb |
2017-05-16 | AD84422 | 8.00 ppb |
2017-05-16 | AD84423 | 8.40 ppb |
2017-05-16 | AD84427 | 7.40 ppb |
2017-05-16 | AD84433 | 7.30 ppb |
2017-05-16 | AD84425 | 6.40 ppb |
2017-05-16 | AD84430 | 7.70 ppb |
2017-05-16 | AD84431 | 7.60 ppb |
2017-05-16 | AD84428 | 7.50 ppb |
2017-05-16 | AD84466 | 6.20 ppb |
2017-07-28 | AD91401 | 2.80 ppb |
2017-07-28 | AD91393 | 3.60 ppb |
2017-08-23 | AD93942 | 3.30 ppb |
2017-08-23 | AD93937 | 3.60 ppb |
2017-08-23 | AD93940 | 4.70 ppb |
2017-08-23 | AD93944 | 4.30 ppb |
2017-08-23 | AD93952 | 4.00 ppb |
2017-08-23 | AD93950 | 5.30 ppb |
2017-08-23 | AD93938 | 4.70 ppb |
2017-08-23 | AD93936 | 4.30 ppb |
2017-08-23 | AD93948 | 3.90 ppb |
2017-08-23 | AD93946 | 4.60 ppb |
2017-08-23 | AD93941 | 4.20 ppb |
2017-08-23 | AD93953 | 4.70 ppb |
2017-11-14 | AE04715 | 5.90 ppb |
2017-11-14 | AE04731 | 7.30 ppb |
2017-11-14 | AE04734 | 7.50 ppb |
2017-11-14 | AE04733 | 8.30 ppb |
2017-11-14 | AE04724 | 6.40 ppb |
2017-11-14 | AE04723 | 8.10 ppb |
2017-11-14 | AE04721 | 7.70 ppb |
2017-11-14 | AE04735 | 8.20 ppb |
2017-11-14 | AE04716 | 6.50 ppb |
2017-11-14 | AE04722 | 7.60 ppb |
2017-11-14 | AE04714 | 6.30 ppb |
2017-11-14 | AE04732 | 7.60 ppb |
2017-11-14 | AE04787 | 6.10 ppb |
2018-02-06 | AE12542 | 4.10 ppb |
2018-02-06 | AE12469 | 5.60 ppb |
2018-02-06 | AE12475 | 5.60 ppb |
2018-02-06 | AE12484 | 5.60 ppb |
2018-02-06 | AE12483 | 5.30 ppb |
2018-02-06 | AE12488 | 4.30 ppb |
2018-02-06 | AE12470 | 4.80 ppb |
2018-02-06 | AE12473 | 5.80 ppb |
2018-02-06 | AE12482 | 6.20 ppb |
2018-02-06 | AE12485 | 5.00 ppb |
2018-02-06 | AE12471 | 5.00 ppb |
2018-02-06 | AE12472 | 4.90 ppb |
2018-02-06 | AE12477 | 5.60 ppb |
2018-04-24 | AE23704 | 4.30 ppb |
2018-04-24 | AE23702 | 4.70 ppb |
2018-04-24 | AE23700 | 5.10 ppb |
2018-04-24 | AE23706 | 4.90 ppb |
2018-04-24 | AE23708 | 4.60 ppb |
2018-04-24 | AE23698 | 4.80 ppb |
2018-04-24 | AE23699 | 5.10 ppb |
2018-04-24 | AE23709 | 5.40 ppb |
2018-04-24 | AE23707 | 3.70 ppb |
2018-04-24 | AE23705 | 5.40 ppb |
2018-04-24 | AE23701 | 4.80 ppb |
2018-04-24 | AE23703 | 4.90 ppb |
2018-07-25 | AE34518 | 2.40 ppb |
2018-07-25 | AE34477 | 3.50 ppb |
2018-07-25 | AE34479 | 2.90 ppb |
2018-07-25 | AE34458 | 3.40 ppb |
2018-07-25 | AE34448 | 2.80 ppb |
2018-07-25 | AE34461 | 3.70 ppb |
2018-07-25 | AE34446 | 2.70 ppb |
2018-07-25 | AE34484 | 4.60 ppb |
2018-07-25 | AE34442 | 3.00 ppb |
2018-07-25 | AE34445 | 3.60 ppb |
2018-07-25 | AE34438 | 4.30 ppb |
2018-07-25 | AE34483 | 3.20 ppb |
2018-07-25 | AE34485 | 3.60 ppb |
2018-10-17 | AE43784 | 6.80 ppb |
2018-10-17 | AE43776 | 5.00 ppb |
2018-10-17 | AE43774 | 6.50 ppb |
2018-10-17 | AE43782 | 7.50 ppb |
2018-10-17 | AE43777 | 6.80 ppb |
2018-10-17 | AE43781 | 7.00 ppb |
2018-10-17 | AE43773 | 6.10 ppb |
2018-10-17 | AE43783 | 7.00 ppb |
2018-10-17 | AE43779 | 6.30 ppb |
2018-10-17 | AE43780 | 7.10 ppb |
2018-10-17 | AE43778 | 7.20 ppb |
2018-10-17 | AE43775 | 6.40 ppb |
2019-01-23 | AE50977 | 5.50 ppb |
2019-01-23 | AE50899 | 16.1 ppb |
2019-01-23 | AE50910 | 16.0 ppb |
2019-01-23 | AE50908 | 14.3 ppb |
2019-01-23 | AE50901 | 11.1 ppb |
2019-01-23 | AE50907 | 13.4 ppb |
2019-01-23 | AE50906 | 12.9 ppb |
2019-01-23 | AE50903 | 14.7 ppb |
2019-01-23 | AE50904 | 14.9 ppb |
2019-01-23 | AE50905 | 12.2 ppb |
2019-01-23 | AE50902 | 13.2 ppb |
2019-01-23 | AE50909 | 14.1 ppb |
2019-01-23 | AE50900 | 15.2 ppb |
2019-04-17 | AE62730 | 14.1 ppb |
2019-04-17 | AE62732 | 11.5 ppb |
2019-04-17 | AE62733 | 14.4 ppb |
2019-04-17 | AE62731 | 14.0 ppb |
2019-04-17 | AE62728 | 14.1 ppb |
2019-04-17 | AE62737 | 11.3 ppb |
2019-04-17 | AE62736 | 15.0 ppb |
2019-04-17 | AE62734 | 14.4 ppb |
2019-04-17 | AE62729 | 13.4 ppb |
2019-04-17 | AE62727 | 12.3 ppb |
2019-04-17 | AE62735 | 13.6 ppb |
2019-04-17 | AE62738 | 14.4 ppb |
2019-07-30 | AE76437 | 2.70 ppb |
2019-07-30 | AE76387 | 4.60 ppb |
2019-07-30 | AE76400 | 4.40 ppb |
2019-07-30 | AE76388 | 4.80 ppb |
2019-07-30 | AE76401 | 4.20 ppb |
2019-07-30 | AE76398 | 4.60 ppb |
2019-07-30 | AE76396 | 4.30 ppb |
2019-07-30 | AE76399 | 4.00 ppb |
2019-07-30 | AE76385 | 3.90 ppb |
2019-07-30 | AE76402 | 4.10 ppb |
2019-07-30 | AE76397 | 4.60 ppb |
2019-07-30 | AE76389 | 4.60 ppb |
2019-07-30 | AE76395 | 4.60 ppb |
2019-11-19 | AE89945 | 1.80 ppb |
2019-11-19 | AE89957 | 3.20 ppb |
2019-11-19 | AE89948 | 1.70 ppb |
2019-11-19 | AE89944 | 1.90 ppb |
2019-11-19 | AE89959 | 1.80 ppb |
2019-11-19 | AE89960 | 2.00 ppb |
2019-11-19 | AE89949 | 1.80 ppb |
2019-11-19 | AE89953 | 1.70 ppb |
2019-11-19 | AE89956 | 1.70 ppb |
2019-11-19 | AE89947 | 2.10 ppb |
2019-11-19 | AE89951 | 1.60 ppb |
2019-11-19 | AE89952 | 2.00 ppb |