Know Your Environment. Protect Your Health.

Chloroform

Middletown Water Department

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.

 

109

Samples

0

Samples exceeding legal limit (MCL)

109

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201839.4 ppb18185.40 ppb - 73.6 ppb
201940.2 ppb18185.80 ppb - 71.1 ppb
202033.8 ppb18184.80 ppb - 75.1 ppb
202136.3 ppb19192.30 ppb - 90.5 ppb
202231.8 ppb18184.00 ppb - 61.6 ppb
202338.9 ppb18188.10 ppb - 90.6 ppb

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
2018-01-05DBP 20048541020.0 ppb
2018-01-05DBP 20048541123.9 ppb
2018-01-05DBP 20048541249.3 ppb
2018-01-05DBP 20048541326.7 ppb
2018-03-28VOC1 20049077015.8 ppb
2018-04-05DBP 20049144629.7 ppb
2018-04-05DBP 20049144727.6 ppb
2018-04-05DBP 20049144830.6 ppb
2018-04-05DBP 20049144928.5 ppb
2018-04-16VOC1 2004921545.40 ppb
2018-07-04DBP 20049863856.5 ppb
2018-07-04DBP 20049863950.0 ppb
2018-07-04DBP 20049864060.5 ppb
2018-07-04DBP 20049864173.6 ppb
2018-10-04DBP 20050804749.2 ppb
2018-10-04DBP 20050804848.1 ppb
2018-10-04DBP 20050804957.5 ppb
2018-10-04DBP 20050805056.2 ppb
2019-01-03DBP 20051750625.1 ppb
2019-01-03DBP 20051750727.6 ppb
2019-01-03DBP 20051750854.2 ppb
2019-01-03DBP 20051750930.3 ppb
2019-04-04DBP 20052718235.9 ppb
2019-04-04DBP 20052718333.5 ppb
2019-04-04DBP 20052718441.9 ppb
2019-04-04DBP 20052718542.7 ppb
2019-05-13VOC1 2005318935.80 ppb
2019-05-21VOC1 20053308330.0 ppb
2019-07-03DBP 20053892271.1 ppb
2019-07-03DBP 20053892350.6 ppb
2019-07-03DBP 20053892467.1 ppb
2019-07-03DBP 20053892569.4 ppb
2019-10-17DBP 20055333326.8 ppb
2019-10-17DBP 20055333535.8 ppb
2019-10-17DBP 20055333736.8 ppb
2019-10-17DBP 20055333938.3 ppb
2020-01-09DBP 20056231317.0 ppb
2020-01-09DBP 20056231418.9 ppb
2020-01-09DBP 20056231524.2 ppb
2020-01-09DBP 20056231620.6 ppb
2020-04-09DBP 20057189336.2 ppb
2020-04-09DBP 20057189536.3 ppb
2020-04-09DBP 20057189632.3 ppb
2020-04-09DBP 20057189735.4 ppb
2020-05-06VOC1 20057472317.1 ppb
2020-05-14VOC1 2005758334.80 ppb
2020-07-09DBP 20058208456.9 ppb
2020-07-09DBP 20058208549.7 ppb
2020-07-09DBP 20058208655.6 ppb
2020-07-09DBP 20058208775.1 ppb
2020-10-15DBP 20059416730.4 ppb
2020-10-15DBP 20059416825.4 ppb
2020-10-15DBP 20059416934.1 ppb
2020-10-15DBP 20059417038.6 ppb
2021-01-14DBP 20060389924.4 ppb
2021-01-14DBP 20060390021.3 ppb
2021-01-14DBP 20060390115.7 ppb
2021-01-14DBP 20060390223.4 ppb
2021-03-03VOC1 2006121855.00 ppb
2021-03-30VOC1 20061218317.7 ppb
2021-03-30VOC1 2006121842.30 ppb
2021-04-15DBP 20061333734.4 ppb
2021-04-15DBP 20061333823.7 ppb
2021-04-15DBP 20061333922.7 ppb
2021-04-15DBP 20061334033.0 ppb
2021-07-08DBP 20062369152.4 ppb
2021-07-08DBP 20062369351.9 ppb
2021-07-08DBP 20062370852.0 ppb
2021-07-08DBP 20062370971.6 ppb
2021-10-21B300086243 30008624537.4 ppb
2021-10-21B300086246 30008624862.3 ppb
2021-10-21B300086249 30008625190.5 ppb
2021-10-21B300086252 30008625447.4 ppb
2022-01-06D300128620 30012862230.2 ppb
2022-01-06D300128623 30012862526.5 ppb
2022-01-06D300128626 30012862832.3 ppb
2022-01-06D300128629 30012863127.1 ppb
2022-04-07D300167654 30016765626.7 ppb
2022-04-07D300167657 30016765922.2 ppb
2022-04-07D300167660 30016766226.2 ppb
2022-04-07D300167663 30016766520.8 ppb
2022-05-11V300182524 30018253117.6 ppb
2022-05-11V300182526 3001825444.00 ppb
2022-07-07D300209431 30020943349.7 ppb
2022-07-07D300209434 30020943646.3 ppb
2022-07-07D300209437 30020943961.6 ppb
2022-07-07D300209440 30020944252.3 ppb
2022-10-27D300264516 30026451836.3 ppb
2022-10-27D300264519 30026452126.9 ppb
2022-10-27D300264522 30026452442.5 ppb
2022-10-27D300264525 30026452723.6 ppb
2023-01-12D300297210 30029721224.6 ppb
2023-01-12D300297213 30029721520.0 ppb
2023-01-12D300297216 30029721827.5 ppb
2023-01-12D300297219 30029722127.7 ppb
2023-04-20D300336739 30033674136.1 ppb
2023-04-20D300336742 30033674431.8 ppb
2023-04-20D300336745 30033674739.2 ppb
2023-04-20D300336748 30033675047.5 ppb
2023-06-23V300370771 30037077227.3 ppb
2023-06-23V300370773 3003707748.10 ppb
2023-07-06D300377098 30037710064.8 ppb
2023-07-06D300377101 30037710369.6 ppb
2023-07-06D300377104 30037710690.6 ppb
2023-07-06D300377107 30037710960.8 ppb
2023-10-19D300433229 30043323129.7 ppb
2023-10-19D300433232 30043323426.8 ppb
2023-10-19D300433235 30043323743.2 ppb
2023-10-19D300433238 30043324024.5 ppb