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EWG's Tap Water Database — 2021 UPDATE

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Chloroform

Rio Rancho Water and Waterworks Services

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0950 ppb168ND - 0.220 ppb
20150.0625 ppb165ND - 0.230 ppb
20160.0906 ppb169ND - 0.290 ppb
20170.0569 ppb164ND - 0.400 ppb
20180.0750 ppb144ND - 0.400 ppb
20190.119 ppb167ND - 0.570 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
2014-01-1620140015270.200 ppb
2014-01-1620140015250.150 ppb
2014-01-1620140015240.150 ppb
2014-01-1620140015260.220 ppb
2014-04-1520140122290.210 ppb
2014-04-152014012230ND
2014-04-152014012228ND
2014-04-152014012227ND
2014-07-152014022639ND
2014-07-152014022641ND
2014-07-152014022642ND
2014-07-1520140226400.200 ppb
2014-10-1520140324400.200 ppb
2014-10-1520140324410.190 ppb
2014-10-152014032439ND
2014-10-152014032438ND
2015-01-2120150022410.230 ppb
2015-01-2120150022400.180 ppb
2015-01-212015002238ND
2015-01-212015002239ND
2015-05-062015013673ND
2015-05-062015013672ND
2015-05-062015013671ND
2015-05-0620150136740.220 ppb
2015-07-302015021812ND
2015-07-302015021813ND
2015-07-302015021811ND
2015-07-3020150218140.170 ppb
2015-10-1420150309430.200 ppb
2015-10-142015030942ND
2015-10-142015030945ND
2015-10-142015030944ND
2016-01-2120160018600.160 ppb
2016-01-212016001863ND
2016-01-2120160018620.170 ppb
2016-01-2120160018610.290 ppb
2016-04-1320160104580.140 ppb
2016-04-132016010457ND
2016-04-132016010456ND
2016-04-132016010455ND
2016-07-1320160199880.140 ppb
2016-07-1320160199900.120 ppb
2016-07-1320160199890.120 ppb
2016-07-132016019991ND
2016-10-132016029746ND
2016-10-132016029745ND
2016-10-1320160297470.180 ppb
2016-10-1320160297480.130 ppb
2017-01-1220170010470.160 ppb
2017-01-1220170010460.150 ppb
2017-01-122017001044ND
2017-01-122017001045ND
2017-04-1220170108280.200 ppb
2017-04-122017010826ND
2017-04-122017010827ND
2017-04-122017010829ND
2017-07-132017020212ND
2017-07-132017020214ND
2017-07-132017020215ND
2017-07-132017020213ND
2017-10-1120170293630.400 ppb
2017-10-112017029361ND
2017-10-112017029362ND
2017-10-182017029990ND
2018-01-1120180011170.210 ppb
2018-01-1120180011160.220 ppb
2018-04-1120180102820.400 ppb
2018-04-112018010281ND
2018-04-112018010280ND
2018-04-112018010279ND
2018-07-112018018857ND
2018-07-112018018856ND
2018-07-1120180188550.220 ppb
2018-07-242018020453ND
2018-10-102018028970ND
2018-10-102018028969ND
2018-10-102018028968ND
2018-10-102018028967ND
2019-01-0920190006270.210 ppb
2019-01-0920190006260.260 ppb
2019-01-0920190006250.210 ppb
2019-01-092019000624ND
2019-04-1720190096910.220 ppb
2019-04-172019009690ND
2019-04-1720190096890.210 ppb
2019-04-1720190096880.230 ppb
2019-07-112019018939ND
2019-07-112019018938ND
2019-07-112019018937ND
2019-07-112019018936ND
2019-10-162019029636ND
2019-10-162019029638ND
2019-10-1620190296370.570 ppb
2019-10-162019029639ND