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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Gloucester City W 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.

MORE ABOUT THIS CONTAMINANT

 

114

Samples

0

Samples exceeding legal limit (MCL)

98

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.99 ppb20201.20 ppb - 7.14 ppb
20153.63 ppb2019ND - 9.80 ppb
20162.17 ppb1815ND - 5.16 ppb
20172.10 ppb2016ND - 7.20 ppb
20180.580 ppb2013ND - 1.90 ppb
20191.24 ppb1615ND - 2.15 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
2014-01-15140115/2114-04T2.15 ppb
2014-01-15140115/2114-03T3.11 ppb
2014-01-15140115/2114-02T3.56 ppb
2014-01-15140115/2114-01T3.17 ppb
2014-03-1014031562-0011.20 ppb
2014-04-02140402/2227-04T1.39 ppb
2014-04-02140402/2227-03T2.26 ppb
2014-04-02140402/2227-02T2.82 ppb
2014-04-02140402/2227-01T2.86 ppb
2014-06-1114061868-0011.20 ppb
2014-07-01140701/2393-04T2.49 ppb
2014-07-01140701/2393-03T4.90 ppb
2014-07-01140701/2393-02T5.61 ppb
2014-07-01140701/2393-01T3.80 ppb
2014-10-02141002/2558-03T7.14 ppb
2014-10-02141002/2558-04T2.68 ppb
2014-10-02141002/2558-02T2.36 ppb
2014-10-02141002/2558-01T1.69 ppb
2014-12-04141204/2653-032.22 ppb
2014-12-09141210/2670-033.28 ppb
2015-01-07150107/2726-04T2.54 ppb
2015-01-07150107/2726-03T7.64 ppb
2015-01-07150107/2726-02T5.56 ppb
2015-01-07150107/2726-01T4.09 ppb
2015-01-14150114/2713-011.21 ppb
2015-04-02150402/2853-4T1.50 ppb
2015-04-02150402/2853-3T2.13 ppb
2015-04-02150402/2853-2T1.79 ppb
2015-04-02150402/2853-1T1.19 ppb
2015-06-29150629/3018-1ND
2015-07-08150708/3052-4T1.54 ppb
2015-07-08150708/3052-3T3.21 ppb
2015-07-08150708/3052-2T3.40 ppb
2015-07-08150708/3052-1T2.73 ppb
2015-09-17150917/3157-18.33 ppb
2015-10-08151008/3238-4T3.51 ppb
2015-10-08151008/3238-3T6.86 ppb
2015-10-08151008/3238-2T9.80 ppb
2015-10-08151008/3238-1T1.89 ppb
2015-11-05151105/3284-43.60 ppb
2016-01-07160107/3376-4T3.12 ppb
2016-01-07160107/3376-3T5.16 ppb
2016-01-07160107/3376-2T2.69 ppb
2016-01-07160107/3376-1T1.97 ppb
2016-01-13160114/3382-11.51 ppb
2016-04-19160419/3573-30.747 ppb
2016-04-20160420/3577-4TND
2016-04-20160420/3577-3TND
2016-04-20160420/3577-2TND
2016-04-20160420/3577-1T0.539 ppb
2016-07-19160719/3742-4T1.26 ppb
2016-07-19160719/3742-2T3.57 ppb
2016-07-19160719/3742-3T4.65 ppb
2016-07-19160719/3742-1T2.02 ppb
2016-10-06161006/3893-2T1.63 ppb
2016-10-06161006/3893-1T3.59 ppb
2016-10-06161006/3893-3T2.67 ppb
2016-10-06161006/3893-4T3.96 ppb
2017-01-25349287022.50 ppb
2017-01-25349287034.00 ppb
2017-01-25349287013.20 ppb
2017-01-25349287043.30 ppb
2017-04-28359508011.70 ppb
2017-04-28359508044.40 ppb
2017-04-28359508026.30 ppb
2017-04-28359508037.20 ppb
2017-06-07364411011.80 ppb
2017-07-2036977504ND
2017-07-20369775021.80 ppb
2017-07-20369775031.60 ppb
2017-07-20369775011.000 ppb
2017-07-20369777010.700 ppb
2017-09-19375481010.800 ppb
2017-10-1137833603ND
2017-10-11378336020.900 ppb
2017-10-1137833601ND
2017-10-11378336040.700 ppb
2017-12-1238493501ND
2018-01-2638859404ND
2018-01-26388594010.800 ppb
2018-01-2638859402ND
2018-01-2638859403ND
2018-03-1439403001ND
2018-04-11396204010.500 ppb
2018-04-11396204031.90 ppb
2018-04-11396204020.900 ppb
2018-04-11396204041.20 ppb
2018-04-1239620405ND
2018-07-1240809701ND
2018-07-1940882001ND
2018-07-19408820041.10 ppb
2018-07-19408820030.900 ppb
2018-07-19408820020.600 ppb
2018-10-03419439030.600 ppb
2018-10-03419439020.900 ppb
2018-10-03419439040.900 ppb
2018-10-03419439010.700 ppb
2018-10-03419439050.600 ppb
2019-01-17R81289TTHM1.43 ppb
2019-01-17R81290TTHM1.70 ppb
2019-01-17R81291TTHM1.01 ppb
2019-01-17R81288TTHM1.58 ppb
2019-04-11R83523TTHM1.06 ppb
2019-04-11R83524TTHM1.48 ppb
2019-04-11R83525TTHM1.03 ppb
2019-05-02R84349TTHM2.09 ppb
2019-07-16R86813TTHM0.600 ppb
2019-07-16R86814TTHM2.15 ppb
2019-07-16R86815TTHM1.77 ppb
2019-07-16R86816TTHM0.980 ppb
2019-10-02R89269TTHMND
2019-10-02R89272TTHM1.14 ppb
2019-10-02R89270TTHM1.08 ppb
2019-10-02R89271TTHM0.710 ppb