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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Carson City Public Works

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

 

254

Samples

0

Samples exceeding legal limit (MCL)

36

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.227 ppb367ND - 1.94 ppb
20150.176 ppb589ND - 1.85 ppb
20160.475 ppb337ND - 4.85 ppb
20170.177 ppb373ND - 3.30 ppb
20180.214 ppb526ND - 3.18 ppb
20190.345 ppb385ND - 4.30 ppb

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
2014-01-282014013001740.860 ppb
2014-01-28201401300175ND
2014-01-28201401300176ND
2014-01-28201401300177ND
2014-01-28201401300178ND
2014-01-28201401300179ND
2014-01-28201401300180ND
2014-01-282014013001810.670 ppb
2014-02-24201402260926-VND
2014-04-082014041202481.56 ppb
2014-04-08201404120249ND
2014-04-08201404120250ND
2014-04-08201404120251ND
2014-04-08201404120252ND
2014-04-08201404120253ND
2014-04-08201404120254ND
2014-04-08201404120255ND
2014-05-27201405280593-VND
2014-07-01201407020370ND
2014-07-282014073002631.94 ppb
2014-07-28201407300264ND
2014-07-28201407300265ND
2014-07-28201407300266ND
2014-07-28201407300267ND
2014-07-28201407300268ND
2014-07-28201407300269ND
2014-07-282014073002701.32 ppb
2014-09-04201409050252ND
2014-10-272014102904400.930 ppb
2014-10-27201410290441ND
2014-10-27201410290442ND
2014-10-27201410290443ND
2014-10-27201410290444ND
2014-10-27201410290445ND
2014-10-27201410290446ND
2014-10-272014102904470.900 ppb
2015-01-262015012807171.01 ppb
2015-01-26201501280718ND
2015-01-26201501280719ND
2015-01-26201501280720ND
2015-01-26201501280721ND
2015-01-26201501280722ND
2015-01-26201501280723ND
2015-01-26201501280724ND
2015-04-282015043001121.85 ppb
2015-04-28201504300113ND
2015-04-28201504300114ND
2015-04-28201504300115ND
2015-04-282015043001161.23 ppb
2015-04-282015043001170.680 ppb
2015-04-28201504300118ND
2015-04-28201504300119ND
2015-05-19201505210392VND
2015-05-19201505210480VND
2015-05-19201505210341VND
2015-05-19201505210388VND
2015-05-20201505210403VND
2015-05-20201505210412VND
2015-05-20201505210405-VOCND
2015-05-21201505220242VND
2015-05-21201505220202V1.000 ppb
2015-05-21201505220247-VOCND
2015-06-01201506030407-VOCND
2015-06-01201506030355-VOCND
2015-06-012015506030247-VOND
2015-06-01201506030333-VOCND
2015-06-09201506120280-VOCND
2015-06-09201506120278-VOCND
2015-06-11201506120209-VOCND
2015-06-11201506120140-VOCND
2015-06-29201506300124-VOCND
2015-06-29201506300177-VOCND
2015-06-30201507010430-VOCND
2015-06-30201507160442-VOCND
2015-07-282015073002291.68 ppb
2015-07-28201507300230ND
2015-07-28201507300231ND
2015-07-28201507300232ND
2015-07-282015073002330.980 ppb
2015-07-282015073002341.24 ppb
2015-07-28201507300235ND
2015-07-28201507300236ND
2015-08-03201508040410-VOCND
2015-08-04201508050421-VOCND
2015-08-10201508110263-VOCND
2015-09-15201509020134-VOCND
2015-10-12201510140539ND
2015-10-12201510140540ND
2015-10-12201510140541ND
2015-10-12201510140542ND
2015-10-12201510140543ND
2015-10-12201510140544ND
2015-10-122015101405450.550 ppb
2015-10-12201510140546ND
2016-01-202016012202251.49 ppb
2016-01-20201601220226ND
2016-01-20201601220227ND
2016-01-202016012202282.21 ppb
2016-01-20201601220229ND
2016-01-20201601220230ND
2016-01-20201601220231ND
2016-01-20201601220232ND
2016-04-262016042803782.00 ppb
2016-04-26201604280379ND
2016-04-26201604280380ND
2016-04-262016042803810.920 ppb
2016-04-26201604280382ND
2016-04-26201604280383ND
2016-04-27201604280384ND
2016-04-27201604280385ND
2016-06-22201606230265-VOCND
2016-07-27201602804203.39 ppb
2016-07-27201607280421ND
2016-07-27201607280422ND
2016-07-27201607280423ND
2016-07-27201607280424ND
2016-07-27201607280425ND
2016-07-27201607280426ND
2016-07-27201607280430ND
2016-10-122016101305124.85 ppb
2016-10-12201610130513ND
2016-10-12201610130514ND
2016-10-12201610130515ND
2016-10-12201610130516ND
2016-10-12201610130517ND
2016-10-12201610130518ND
2016-10-122016101305190.820 ppb
2017-01-25201701270428ND
2017-01-25201701270429ND
2017-01-25201701270430ND
2017-01-25201701270431ND
2017-01-25201701270433ND
2017-01-25201701270434ND
2017-01-25201701270435ND
2017-01-2520171270432ND
2017-02-212017022209281.64 ppb
2017-04-24201704260763ND
2017-04-24201704260764ND
2017-04-24201704260765ND
2017-04-24201704260766ND
2017-04-24201704260767ND
2017-04-24201704260768ND
2017-04-24201704260769ND
2017-04-242017042607701.62 ppb
2017-05-15201705160571ND
2017-05-16201705170782-VOCND
2017-05-23201705240769ND
2017-06-21201706220614ND
2017-07-18201707190690ND
2017-07-18201707190691ND
2017-07-18201707190692ND
2017-07-18201707190693ND
2017-07-18201707190694ND
2017-07-18201707190695ND
2017-07-18201707190696ND
2017-07-18201707190697ND
2017-10-052017100601503.30 ppb
2017-10-05201710060152ND
2017-10-05201710060153ND
2017-10-05201710060154ND
2017-10-05201710060155ND
2017-10-05201710060156ND
2017-10-05201710060157ND
2017-10-16201710170612ND
2018-02-272018022804321.66 ppb
2018-02-27201802280435ND
2018-02-27201802280436ND
2018-02-27201802280437ND
2018-02-27201802280438ND
2018-02-27201802280439ND
2018-02-27201802280440ND
2018-02-272018022804411.41 ppb
2018-04-26201804300373ND
2018-05-102018051106392.16 ppb
2018-05-10201805110640ND
2018-05-10201805110641ND
2018-05-10201805110642ND
2018-05-10201805110643ND
2018-05-10201805110644ND
2018-05-10201805110645ND
2018-05-102018051106460.500 ppb
2018-05-15201805161020ND
2018-05-24201805250730ND
2018-05-30201805310575ND
2018-05-31201806010519ND
2018-07-23201807240376ND
2018-07-242018072604383.18 ppb
2018-07-24201807260439ND
2018-07-24201807260440ND
2018-07-24201807260441ND
2018-07-24201807260442ND
2018-07-24201807260443ND
2018-07-24201807260444ND
2018-07-24201807260445ND
2018-08-09201808110163ND
2018-08-14201808160451ND
2018-08-14201808160455ND
2018-09-13201809140770ND
2018-09-13201809140813-VOCND
2018-09-18201809190678ND
2018-09-19201809200852ND
2018-10-16201810170779ND
2018-10-16201810170780ND
2018-10-16201810180738AND
2018-10-16201810180748AND
2018-10-17201810190329AND
2018-10-18201810190370AND
2018-10-182018101906002.20 ppb
2018-10-18201810190601ND
2018-10-18201810190602ND
2018-10-18201810190603ND
2018-10-18201810190604ND
2018-10-18201810190605ND
2018-10-18201810190606ND
2018-10-18201810190607ND
2018-11-26201811270444ND
2019-01-232019012404273.67 ppb
2019-01-23201901240428ND
2019-01-23201901240429ND
2019-01-23201901240430ND
2019-01-23201901240431ND
2019-01-23201901240432ND
2019-01-23201901240433ND
2019-01-23201901240434ND
2019-04-232019042502211.07 ppb
2019-04-23201904250222ND
2019-04-23201904250223ND
2019-04-232019042502241.91 ppb
2019-04-24201904250225ND
2019-04-24201904250226ND
2019-04-24201904250227ND
2019-04-24201904250228ND
2019-06-24201906250202AND
2019-06-26201906270391ND
2019-07-232019072404742.15 ppb
2019-07-23201907240475ND
2019-07-23201907240476ND
2019-07-23201907240477ND
2019-07-23201907240478ND
2019-07-23201907240479ND
2019-07-23201907240480ND
2019-07-23201907240481ND
2019-08-21201908220455AND
2019-08-22201908230667AND
2019-09-24201909250291ND
2019-09-24201909250649AND
2019-10-222019102307174.30 ppb
2019-10-22201910230718ND
2019-10-22201910230719ND
2019-10-22201910230720ND
2019-10-22201910230721ND
2019-10-22201910230722ND
2019-10-22201910230723ND
2019-10-22201910230724ND