Know Your Environment. Protect Your Health.

Chloroform

Hazardville Water Company

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.

 

135

Samples

0

Samples exceeding legal limit (MCL)

93

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.84 ppb2214ND - 8.00 ppb
20191.35 ppb2113ND - 9.10 ppb
20201.26 ppb2517ND - 4.30 ppb
20212.42 ppb2116ND - 9.00 ppb
20222.29 ppb2115ND - 10.00 ppb
20232.44 ppb2518ND - 12.0 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
2018-01-03BZ68303VOC1ND
2018-01-22BZ78627TTHM1.40 ppb
2018-01-22BZ78628TTHM3.60 ppb
2018-01-22BZ78629TTHMND
2018-01-22BZ78630TTHMND
2018-04-03CA12985VOC1ND
2018-04-23CA35126TTHM1.70 ppb
2018-04-23CA35127TTHM4.00 ppb
2018-04-23CA35128TTHM2.10 ppb
2018-04-23CA35129TTHM0.630 ppb
2018-07-02CA82194ND
2018-07-02CA82195ND
2018-07-02CA82195VOC1ND
2018-07-23CA967623.10 ppb
2018-07-23CA967638.00 ppb
2018-07-23CA967643.00 ppb
2018-07-23CA967651.70 ppb
2018-10-10CB69247ND
2018-10-22CB803922.60 ppb
2018-10-22CB803936.90 ppb
2018-10-22CB803940.690 ppb
2018-10-22CB803951.000 ppb
2019-01-07CC25226ND
2019-01-21CC326301.50 ppb
2019-01-21CC326311.10 ppb
2019-01-21CC326320.640 ppb
2019-01-21CC32633ND
2019-04-02CC79783ND
2019-04-22CC99840ND
2019-04-22CC998413.70 ppb
2019-04-22CC998420.580 ppb
2019-04-22CC998430.730 ppb
2019-07-09CD52639ND
2019-07-09CD52640ND
2019-07-22CD632550.800 ppb
2019-07-22CD632569.10 ppb
2019-07-22CD632572.50 ppb
2019-07-22CD632582.00 ppb
2019-10-08CE28924ND
2019-10-21CE457052.20 ppb
2019-10-21CE457062.20 ppb
2019-10-21CE45707ND
2019-10-21CE457081.40 ppb
2020-01-13CF12156ND
2020-01-27CF222221.20 ppb
2020-01-27CF222232.10 ppb
2020-01-27CF222240.530 ppb
2020-01-27CF22225ND
2020-04-01CF59969ND
2020-04-21CF766611.80 ppb
2020-04-21CF766622.50 ppb
2020-04-21CF766630.840 ppb
2020-04-21CF766640.790 ppb
2020-07-01CG26322ND
2020-07-01CG263190.630 ppb
2020-07-01CG26321ND
2020-07-01CG26323ND
2020-07-01CG263200.910 ppb
2020-07-01CG26324ND
2020-07-21CG376220.890 ppb
2020-07-21CG376234.30 ppb
2020-07-21CG376242.30 ppb
2020-07-21CG376252.40 ppb
2020-10-26CH044472.40 ppb
2020-10-26CH044483.70 ppb
2020-10-26CH044491.50 ppb
2020-10-26CH044502.60 ppb
2020-12-21CH35890ND
2021-01-25CH526401.90 ppb
2021-01-25CH526414.10 ppb
2021-01-25CH526421.40 ppb
2021-01-25CH526431.000 ppb
2021-02-02CH56335ND
2021-04-12CH98310ND
2021-04-26CI162413.80 ppb
2021-04-26CI162423.40 ppb
2021-04-26CI162431.20 ppb
2021-04-26CI162442.80 ppb
2021-07-07CI68950ND
2021-07-07CI68951ND
2021-07-26CI828571.90 ppb
2021-07-26CI828587.00 ppb
2021-07-26CI828592.10 ppb
2021-07-26CI828604.30 ppb
2021-10-12CJ55044ND
2021-10-25CJ648353.50 ppb
2021-10-25CJ648369.00 ppb
2021-10-25CJ648372.00 ppb
2021-10-25CJ648381.50 ppb
2022-01-05CK10281ND
2022-01-24CK224950.520 ppb
2022-01-24CK224961.40 ppb
2022-01-24CK224970.990 ppb
2022-01-24CK22498ND
2022-04-12CL06123ND
2022-04-25CL158202.00 ppb
2022-04-25CL158214.20 ppb
2022-04-25CL158221.20 ppb
2022-04-25CL158232.20 ppb
2022-07-18CL79816ND
2022-07-18CL79821ND
2022-07-25CL862242.20 ppb
2022-07-25CL862257.90 ppb
2022-07-25CL862263.10 ppb
2022-07-25CL862276.30 ppb
2022-10-04CM49070ND
2022-10-24CM697511.50 ppb
2022-10-24CM6975210.00 ppb
2022-10-24CM697531.20 ppb
2022-10-24CM697543.30 ppb
2023-01-09CN19981ND
2023-01-23CN282121.60 ppb
2023-01-23CN282132.30 ppb
2023-01-23CN282140.890 ppb
2023-01-23CN282151.000 ppb
2023-04-03CN75054ND
2023-04-24CN896792.70 ppb
2023-04-24CN896802.80 ppb
2023-04-24CN896811.20 ppb
2023-04-24CN896822.20 ppb
2023-07-17CO51862ND
2023-07-17CO518590.800 ppb
2023-07-17CO51861ND
2023-07-17CO51863ND
2023-07-17CO518601.30 ppb
2023-07-17CO51864ND
2023-07-24CO569142.50 ppb
2023-07-24CO569155.70 ppb
2023-07-24CO569162.60 ppb
2023-07-24CO569178.30 ppb
2023-10-10CP21649ND
2023-10-23CP314675.10 ppb
2023-10-23CP3146812.0 ppb
2023-10-23CP314693.10 ppb
2023-10-23CP314705.00 ppb