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EWG's Tap Water Database — 2019 UPDATE

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Chloroform

City of Santa Barbara 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.

 

204

Samples

0

Samples exceeding legal limit (MCL)

182

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201224.5 ppb98ND - 32.2 ppb
201329.4 ppb3533ND - 57.5 ppb
201415.6 ppb3834ND - 29.3 ppb
20158.66 ppb3633ND - 18.0 ppb
20164.46 ppb4235ND - 12.0 ppb
201711.9 ppb4439ND - 30.0 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
2012-07-189590-005-0923ND
2012-11-055867-044-095332.2 ppb
2012-11-055867-045-104820.5 ppb
2012-11-055867-046-090631.2 ppb
2012-11-055867-047-093228.7 ppb
2012-11-055867-048-101229.3 ppb
2012-11-055867-049-084530.1 ppb
2012-11-055867-050-111125.0 ppb
2012-11-055867-051-113323.3 ppb
2013-02-045867-044-094254.6 ppb
2013-02-045867-045-130425.4 ppb
2013-02-045867-046-090234.2 ppb
2013-02-045867-047-092034.9 ppb
2013-02-045867-048-095234.0 ppb
2013-02-045867-049-084129.3 ppb
2013-02-045867-050-111127.3 ppb
2013-02-045867-051-102130.5 ppb
2013-04-299590-053-0947ND
2013-05-065867-044-104357.5 ppb
2013-05-065867-045-112128.4 ppb
2013-05-065867-046-100242.8 ppb
2013-05-065867-047-102350.7 ppb
2013-05-065867-048-105853.1 ppb
2013-05-065867-049-093852.5 ppb
2013-05-065867-050-114233.4 ppb
2013-05-065867-051-115639.8 ppb
2013-08-055867-044-083940.7 ppb
2013-08-055867-045-085818.9 ppb
2013-08-055867-046-091935.0 ppb
2013-08-055867-047-094033.9 ppb
2013-08-055867-048-095836.7 ppb
2013-08-055867-049-112834.3 ppb
2013-08-055867-050-102328.5 ppb
2013-08-055867-051-110621.4 ppb
2013-08-189590-031-1605ND
2013-10-079590-022-12151.20 ppb
2013-11-045867-044-084722.9 ppb
2013-11-045867-045-09377.40 ppb
2013-11-045867-046-080321.0 ppb
2013-11-045867-047-082628.5 ppb
2013-11-045867-048-090419.6 ppb
2013-11-045867-049-074119.1 ppb
2013-11-045867-050-100218.0 ppb
2013-11-045867-051-102815.2 ppb
2014-01-145867-004-09111.20 ppb
2014-01-145867-054-09242.90 ppb
2014-02-035867-044-114318.6 ppb
2014-02-035867-045-10065.20 ppb
2014-02-035867-046-104414.8 ppb
2014-02-035867-047-111717.6 ppb
2014-02-035867-048-120213.7 ppb
2014-02-035867-049-102315.4 ppb
2014-02-035867-050-130411.7 ppb
2014-02-035867-051-123017.8 ppb
2014-05-055867-044-115827.1 ppb
2014-05-055867-045-09127.00 ppb
2014-05-055867-046-095623.5 ppb
2014-05-055867-047-102221.2 ppb
2014-05-055867-048-121718.1 ppb
2014-05-055867-049-093218.6 ppb
2014-05-055867-050-082016.9 ppb
2014-05-055867-051-084715.3 ppb
2014-08-045867-044-094129.3 ppb
2014-08-045867-045-081812.2 ppb
2014-08-045867-046-085728.5 ppb
2014-08-045867-047-092128.6 ppb
2014-08-045867-048-095628.3 ppb
2014-08-045867-049-083624.2 ppb
2014-08-045867-050-104324.1 ppb
2014-08-045867-051-075919.6 ppb
2014-10-219590-015-0843ND
2014-10-219590-035-0931ND
2014-10-219590-042-0758ND
2014-10-229590-004-1014ND
2014-11-045867-044-105225.1 ppb
2014-11-045867-045-08447.00 ppb
2014-11-045867-046-100115.2 ppb
2014-11-045867-047-102619.4 ppb
2014-11-045867-048-111020.4 ppb
2014-11-045867-049-094020.2 ppb
2014-11-045867-050-09148.90 ppb
2014-11-045867-051-081813.9 ppb
2015-02-025867-044-092416.0 ppb
2015-02-025867-045-09472.90 ppb
2015-02-025867-046-10108.60 ppb
2015-02-025867-047-104310.9 ppb
2015-02-025867-048-105811.6 ppb
2015-02-025867-049-11509.20 ppb
2015-02-025867-050-09065.10 ppb
2015-02-025867-051-11295.90 ppb
2015-05-049590-044-110718.0 ppb
2015-05-049590-045-09457.70 ppb
2015-05-049590-046-10259.00 ppb
2015-05-049590-047-10498.90 ppb
2015-05-049590-048-112111.0 ppb
2015-05-049590-049-10068.90 ppb
2015-05-049590-050-12105.70 ppb
2015-05-049590-051-11487.90 ppb
2015-05-129590-055-0842ND
2015-08-039590-044-074511.0 ppb
2015-08-039590-045-09409.10 ppb
2015-08-039590-046-091211.0 ppb
2015-08-039590-047-085215.0 ppb
2015-08-039590-048-081012.0 ppb
2015-08-039590-049-083011.0 ppb
2015-08-039590-050-10108.00 ppb
2015-08-039590-051-10337.20 ppb
2015-10-219590-004-0947ND
2015-10-219590-054-10021.80 ppb
2015-11-029590-044-105512.0 ppb
2015-11-029590-045-11581.40 ppb
2015-11-029590-046-100513.0 ppb
2015-11-029590-047-102913.0 ppb
2015-11-029590-048-110814.0 ppb
2015-11-029590-049-094612.0 ppb
2015-11-029590-050-08588.80 ppb
2015-11-029590-051-11374.20 ppb
2015-11-109590-005-1050ND
2016-01-129590-004-0856ND
2016-01-129590-054-09101.20 ppb
2016-02-019590-044-11267.40 ppb
2016-02-019590-045-10081.90 ppb
2016-02-019590-046-10486.50 ppb
2016-02-019590-047-11058.00 ppb
2016-02-019590-048-11416.60 ppb
2016-02-019590-049-10265.10 ppb
2016-02-019590-050-12272.90 ppb
2016-02-019590-051-12503.70 ppb
2016-04-069590-004-0828ND
2016-04-069590-054-08461.20 ppb
2016-05-029590-044-12017.50 ppb
2016-05-029590-045-1031ND
2016-05-029590-046-11115.20 ppb
2016-05-029590-047-11366.70 ppb
2016-05-029590-048-12135.50 ppb
2016-05-029590-049-10515.10 ppb
2016-05-029590-050-12553.80 ppb
2016-05-029590-051-10052.80 ppb
2016-07-129590-004-0835ND
2016-07-129590-054-08452.40 ppb
2016-08-019590-044-102111.0 ppb
2016-08-019590-045-10556.30 ppb
2016-08-019590-046-093212.0 ppb
2016-08-019590-047-095612.0 ppb
2016-08-019590-048-103412.0 ppb
2016-08-019590-049-091311.0 ppb
2016-08-019590-050-11186.40 ppb
2016-08-019590-051-11436.50 ppb
2016-10-129590-004-1023ND
2016-10-129590-054-11201.40 ppb
2016-11-029590-031-1120ND
2016-11-029590-053-1152ND
2016-11-079590-044-12023.70 ppb
2016-11-079590-045-12403.10 ppb
2016-11-079590-046-11193.00 ppb
2016-11-079590-047-11423.20 ppb
2016-11-079590-048-12184.20 ppb
2016-11-079590-049-09263.40 ppb
2016-11-079590-050-13073.70 ppb
2016-11-079590-051-09061.000 ppb
2017-01-119590-004-1034ND
2017-01-119590-054-10431.50 ppb
2017-02-069590-044-09472.60 ppb
2017-02-069590-045-10571.20 ppb
2017-02-069590-046-08441.90 ppb
2017-02-069590-047-09232.20 ppb
2017-02-069590-048-10342.40 ppb
2017-02-069590-049-08182.20 ppb
2017-02-069590-050-11232.00 ppb
2017-02-069590-051-10131.30 ppb
2017-04-059590-004-09461.40 ppb
2017-04-059590-054-09566.70 ppb
2017-05-019590-044-123926.0 ppb
2017-05-019590-045-101414.0 ppb
2017-05-019590-046-112722.0 ppb
2017-05-019590-047-120221.0 ppb
2017-05-019590-048-130026.0 ppb
2017-05-019590-049-104823.0 ppb
2017-05-019590-050-135230.0 ppb
2017-05-019590-051-091018.0 ppb
2017-05-189590-058-1734ND
2017-07-199590-004-09331.90 ppb
2017-07-199590-054-09456.00 ppb
2017-08-079590-044-122521.0 ppb
2017-08-079590-045-104912.0 ppb
2017-08-079590-046-113125.0 ppb
2017-08-079590-047-120026.0 ppb
2017-08-079590-048-124227.0 ppb
2017-08-079590-049-110822.0 ppb
2017-08-079590-050-133014.0 ppb
2017-08-079590-051-130613.0 ppb
2017-10-049590-004-11241.80 ppb
2017-10-049590-054-11404.60 ppb
2017-11-069590-044-123521.0 ppb
2017-11-069590-045-093711.0 ppb
2017-11-069590-046-113920.0 ppb
2017-11-069590-047-121320.0 ppb
2017-11-069590-048-130420.0 ppb
2017-11-069590-049-110119.0 ppb
2017-11-069590-050-121816.0 ppb
2017-11-069590-051-130015.0 ppb
2017-11-079590-004-0955ND
2017-11-149590-035-0930ND
2017-11-149590-042-0848ND