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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Tacoma

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

347

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND640ND
20150.216 ppb5515ND - 1.20 ppb
20160.0290 ppb613ND - 0.740 ppb
2017ND600ND
2018ND560ND
2019ND510ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-01-0790631ND
2014-01-0790639ND
2014-01-0790628ND
2014-01-0790634ND
2014-01-0790638ND
2014-01-0790630ND
2014-01-0790635ND
2014-01-0790629ND
2014-01-0790633ND
2014-01-0790636ND
2014-01-0790632ND
2014-01-0790640ND
2014-01-0790637ND
2014-01-0790627ND
2014-01-0790626ND
2014-04-1470463ND
2014-04-1470468ND
2014-04-1470466ND
2014-04-1470467ND
2014-04-1470461ND
2014-04-1470471ND
2014-04-1470469ND
2014-04-1470470ND
2014-04-1470462ND
2014-04-1570475ND
2014-04-1570465ND
2014-04-1570474ND
2014-04-1570473ND
2014-04-1570472ND
2014-04-1570464ND
2014-07-1470686ND
2014-07-1470683ND
2014-07-1470689ND
2014-07-1470682ND
2014-07-1470685ND
2014-07-1470688ND
2014-07-1470691ND
2014-07-1470690ND
2014-07-1470687ND
2014-07-1470684ND
2014-07-1470681ND
2014-07-1570693ND
2014-07-1570695ND
2014-07-1570694ND
2014-07-1570692ND
2014-10-0600256ND
2014-10-0600260ND
2014-10-0600257ND
2014-10-0600255ND
2014-10-0600258ND
2014-10-0600259ND
2014-10-0600254ND
2014-10-0600253ND
2014-10-0600252ND
2014-10-0600261ND
2014-10-0700266ND
2014-10-0700265ND
2014-10-0700262ND
2014-10-0700263ND
2014-10-0700264ND
2014-11-1329191ND
2014-11-1429192ND
2014-11-1830352ND
2014-12-0234852ND
2015-01-1350739ND
2015-01-1350738ND
2015-01-1350737ND
2015-01-1350736ND
2015-01-1350735ND
2015-01-1450733ND
2015-01-1450732ND
2015-01-1450731ND
2015-01-1450730ND
2015-01-1450729ND
2015-01-1450728ND
2015-01-1450727ND
2015-01-1450726ND
2015-01-1450734ND
2015-01-1450725ND
2015-06-0827944ND
2015-07-0790421ND
2015-07-0790423ND
2015-07-0890420ND
2015-07-0890425ND
2015-07-08904271.000 ppb
2015-07-0890422ND
2015-07-0890424ND
2015-07-0890426ND
2015-08-0585793ND
2015-10-1350409ND
2015-10-1350413ND
2015-10-1350412ND
2015-10-1350407ND
2015-10-1350410ND
2015-10-1350399ND
2015-10-1350404ND
2015-10-13504060.600 ppb
2015-10-1350401ND
2015-10-1350403ND
2015-10-1350400ND
2015-10-13504050.630 ppb
2015-10-1350408ND
2015-10-1350402ND
2015-10-1450411ND
2015-12-01386610.590 ppb
2015-12-01386610.590 ppb
2015-12-01386610.590 ppb
2015-12-01386610.590 ppb
2015-12-02386621.20 ppb
2015-12-02386621.20 ppb
2015-12-02386621.20 ppb
2015-12-02386621.20 ppb
2015-12-03386630.620 ppb
2015-12-03386630.620 ppb
2015-12-03386630.620 ppb
2015-12-03386630.620 ppb
2015-12-0741682ND
2015-12-0741681ND
2015-12-0841683ND
2016-01-04ND
2016-01-04ND
2016-01-04ND
2016-01-04ND
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-05ND
2016-01-06ND
2016-01-06ND
2016-01-06ND
2016-01-06ND
2016-01-06ND
2016-04-04ND
2016-04-04ND
2016-04-040.500 ppb
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-040.530 ppb
2016-04-04ND
2016-04-04ND
2016-04-040.740 ppb
2016-04-04ND
2016-04-04ND
2016-04-04ND
2016-04-05ND
2016-04-05ND
2016-04-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-07-06ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-03ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-01-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-03ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-05ND
2017-07-06ND
2017-07-06ND
2017-07-06ND
2017-07-06ND
2017-07-06ND
2017-07-06ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-02ND
2017-10-03ND
2017-10-03ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-02ND
2018-01-03ND
2018-01-03ND
2018-01-03ND
2018-01-03ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-02ND
2018-04-03ND
2018-04-03ND
2018-07-02ND
2018-07-02ND
2018-07-02ND
2018-07-02ND
2018-07-02ND
2018-07-02ND
2018-07-02ND
2018-07-03ND
2018-07-03ND
2018-07-03ND
2018-07-03ND
2018-07-03ND
2018-07-03ND
2018-07-03ND
2018-07-03ND
2018-10-30ND
2018-10-30ND
2018-10-30ND
2018-10-30ND
2018-10-30ND
2018-10-31ND
2018-10-31ND
2018-10-31ND
2018-10-31ND
2018-10-31ND
2018-10-31ND
2018-10-31ND
2019-01-02ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-14ND
2019-01-15ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-01ND
2019-04-03ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-08ND
2019-07-24ND
2019-10-01ND
2019-10-01ND
2019-10-01ND
2019-10-01ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-10-02ND
2019-12-03ND