Know Your Environment. Protect Your Health.

Chloroform

City of Krum

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.

Click here to read more about disinfection byproducts.

 

72

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0992 ppb121ND - 1.19 ppb
2019ND120ND
2020ND120ND
20210.214 ppb122ND - 1.33 ppb
2022ND120ND
2023ND120ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on 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 fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-10Q1801331004ND
2018-01-10Q1801331005ND
2018-01-10Q1801331008ND
2018-01-10Q1801331015ND
2018-01-10Q1801331016ND
2018-01-10Q1801331001ND
2018-04-10Q1814607001ND
2018-04-10Q1814607002ND
2018-07-18Q18288600021.19 ppb
2018-07-18Q1828860003ND
2018-10-09Q1840450001ND
2018-10-09Q1840450002ND
2019-01-09Q1901597002ND
2019-01-09Q1901597004ND
2019-01-09Q1901597005ND
2019-01-09Q1901597019ND
2019-01-09Q1901597020ND
2019-04-04Q1913696001ND
2019-04-04Q1913696002ND
2019-08-20Q1957155001ND
2019-08-20Q1957155008ND
2019-08-20Q1957155007ND
2019-10-15Q1972688001ND
2019-10-15Q1972688002ND
2020-02-03Q2004501001ND
2020-02-03Q2004501002ND
2020-05-11Q2018215005ND
2020-05-11Q2018215011ND
2020-05-11Q2018215012ND
2020-08-04Q2030359001ND
2020-08-04Q2030359002ND
2020-10-06Q2039052006ND
2020-10-06Q2039052008ND
2020-10-06Q2039052010ND
2020-10-06Q2039052022ND
2020-10-06Q2039052023ND
2021-01-20Q2101424002ND
2021-01-20Q2101424006ND
2021-01-20Q2101424005ND
2021-05-25Q2113519001ND
2021-05-25Q2113519002ND
2021-08-19Q21225420011.33 ppb
2021-08-19Q21225420021.24 ppb
2021-11-18Q2132474001ND
2021-11-18Q2132474003ND
2021-11-18Q2132474010ND
2021-11-18Q2132474012ND
2021-11-18Q2132474013ND
2022-02-08Q2204313004ND
2022-02-08Q2204313006ND
2022-02-08Q2204313011ND
2022-02-08Q2204313012ND
2022-04-13Q2211388001ND
2022-04-13Q2211388002ND
2022-08-02Q2222011002ND
2022-08-02Q2222011001ND
2022-10-19Q2231852005ND
2022-10-19Q2231852007ND
2022-10-19Q2231852015ND
2022-10-19Q2231852016ND
2023-02-28Q2307984004ND
2023-03-15Q2310240001ND
2023-03-15Q2310240002ND
2023-06-12Q2322093001ND
2023-06-12Q2322093002ND
2023-08-14Q2333742005ND
2023-08-14Q2333742006ND
2023-08-14Q2333742007ND
2023-11-07Q2347808003ND
2023-11-07Q2347808010ND
2023-11-07Q2347808011ND
2023-11-29Q2350801001ND