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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Missouri American St. Louis County & St. Charles County

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

 

405

Samples

0

Samples exceeding legal limit (MCL)

375

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20145.27 ppb8579ND - 14.7 ppb
20154.13 ppb64640.600 ppb - 12.3 ppb
20163.26 ppb64640.500 ppb - 12.1 ppb
20173.74 ppb6453ND - 13.4 ppb
20184.61 ppb6457ND - 14.3 ppb
20193.77 ppb6458ND - 15.3 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-02-19246906014.70 ppb
2014-02-19246907014.50 ppb
2014-02-19246909014.90 ppb
2014-02-19246910014.50 ppb
2014-02-19246914012.80 ppb
2014-02-19246915012.70 ppb
2014-02-19246916013.30 ppb
2014-02-19246917016.90 ppb
2014-02-192469210113.1 ppb
2014-02-192469220114.0 ppb
2014-02-192469230114.7 ppb
2014-02-192469310112.1 ppb
2014-02-192469320112.5 ppb
2014-02-192469330112.9 ppb
2014-02-192469340111.7 ppb
2014-02-192469350112.3 ppb
2014-05-14255916018.40 ppb
2014-05-14255917017.30 ppb
2014-05-14255919017.80 ppb
2014-05-14255920015.30 ppb
2014-05-14255924014.50 ppb
2014-05-14255925014.40 ppb
2014-05-14255926012.70 ppb
2014-05-1425592701ND
2014-05-14255931010.500 ppb
2014-05-14255932010.600 ppb
2014-05-14255933010.500 ppb
2014-05-14255941010.500 ppb
2014-05-14255942010.500 ppb
2014-05-14255943010.600 ppb
2014-05-14255944010.700 ppb
2014-05-14255945010.700 ppb
2014-07-23AC300689.76 ppb
2014-07-23AC3006910.1 ppb
2014-07-23AC300701.48 ppb
2014-07-23AC300711.70 ppb
2014-07-23AC300728.99 ppb
2014-08-192654730111.0 ppb
2014-08-192654740112.6 ppb
2014-08-192654760112.4 ppb
2014-08-192654770112.0 ppb
2014-08-19265481018.20 ppb
2014-08-19265482019.50 ppb
2014-08-19265483018.20 ppb
2014-08-19265484019.80 ppb
2014-08-19265488011.60 ppb
2014-08-19265489011.80 ppb
2014-08-19265490011.70 ppb
2014-08-19265498011.000 ppb
2014-08-19265499011.000 ppb
2014-08-19265500011.000 ppb
2014-08-19265501011.000 ppb
2014-08-19265502010.900 ppb
2014-08-19AC3093410.8 ppb
2014-08-19AC309351.48 ppb
2014-08-19AC309361.79 ppb
2014-08-19AC3093710.8 ppb
2014-08-19AC3093810.7 ppb
2014-08-19AC309391.36 ppb
2014-08-19AC309409.56 ppb
2014-08-19AC309410.980 ppb
2014-08-19AC309427.18 ppb
2014-08-19AC309430.790 ppb
2014-08-19AC309448.99 ppb
2014-08-19AC309458.50 ppb
2014-08-19AC309460.940 ppb
2014-08-19AC309477.36 ppb
2014-08-19AC309480.760 ppb
2014-08-19AC309490.880 ppb
2014-11-06273798017.10 ppb
2014-11-06273799017.10 ppb
2014-11-06273801017.20 ppb
2014-11-06273802016.80 ppb
2014-11-06273806016.90 ppb
2014-11-06273807016.60 ppb
2014-11-06273808013.70 ppb
2014-11-06273809018.00 ppb
2014-11-06273813010.600 ppb
2014-11-06273814011.40 ppb
2014-11-06273815011.20 ppb
2014-11-0627382301ND
2014-11-0627382401ND
2014-11-0627382501ND
2014-11-0627382601ND
2014-11-0627382701ND
2015-02-12281529012.80 ppb
2015-02-12281533013.10 ppb
2015-02-12281538011.80 ppb
2015-02-12281544018.10 ppb
2015-02-12281558014.60 ppb
2015-02-12281530012.70 ppb
2015-02-12281532013.60 ppb
2015-02-12281537011.60 ppb
2015-02-12281539011.50 ppb
2015-02-12281540012.20 ppb
2015-02-12281545019.40 ppb
2015-02-12281546018.80 ppb
2015-02-12281554017.30 ppb
2015-02-12281555018.00 ppb
2015-02-12281556014.50 ppb
2015-02-12281557014.90 ppb
2015-05-12288842016.60 ppb
2015-05-12288845018.50 ppb
2015-05-12288850014.00 ppb
2015-05-12288851012.00 ppb
2015-05-12288859010.800 ppb
2015-05-12288870010.600 ppb
2015-05-12288871010.800 ppb
2015-05-12288872011.30 ppb
2015-05-12288841015.40 ppb
2015-05-12288844015.30 ppb
2015-05-12288852011.50 ppb
2015-05-12288853010.600 ppb
2015-05-12288858010.600 ppb
2015-05-12288860010.700 ppb
2015-05-12288869010.600 ppb
2015-05-12288873010.800 ppb
2015-08-25298009015.20 ppb
2015-08-25298012017.60 ppb
2015-08-25298013017.10 ppb
2015-08-25298018017.70 ppb
2015-08-25298019016.30 ppb
2015-08-25298020014.90 ppb
2015-08-25298026010.800 ppb
2015-08-25298027010.700 ppb
2015-08-25298028010.700 ppb
2015-08-25298038011.000 ppb
2015-08-25298040010.600 ppb
2015-08-25298010017.40 ppb
2015-08-25298021014.10 ppb
2015-08-25298037011.000 ppb
2015-08-25298039010.900 ppb
2015-08-25298041010.900 ppb
2015-11-12306469015.00 ppb
2015-11-12306470015.60 ppb
2015-11-12306475015.40 ppb
2015-11-123064830111.7 ppb
2015-11-123064840112.3 ppb
2015-11-123064850112.0 ppb
2015-11-12306494014.80 ppb
2015-11-12306495016.80 ppb
2015-11-12306496012.90 ppb
2015-11-12306497014.20 ppb
2015-11-12306476014.00 ppb
2015-11-12306477014.00 ppb
2015-11-12306478012.20 ppb
2015-11-12306498012.60 ppb
2015-11-12306466014.60 ppb
2015-11-12306467014.60 ppb
2016-02-16312629012.80 ppb
2016-02-16312635012.50 ppb
2016-02-16312636012.10 ppb
2016-02-16312637013.90 ppb
2016-02-16312657010.800 ppb
2016-02-16312625012.50 ppb
2016-02-16312626013.00 ppb
2016-02-16312628013.20 ppb
2016-02-16312634012.90 ppb
2016-02-163126420111.6 ppb
2016-02-16312653011.70 ppb
2016-02-16312654013.20 ppb
2016-02-16312655011.10 ppb
2016-02-16312656011.90 ppb
2016-02-253158060112.0 ppb
2016-02-253158070112.1 ppb
2016-05-17319637013.60 ppb
2016-05-17319642012.60 ppb
2016-05-17319643013.80 ppb
2016-05-17319652010.700 ppb
2016-05-17319662010.500 ppb
2016-05-17319665010.600 ppb
2016-05-17319633013.50 ppb
2016-05-17319634013.80 ppb
2016-05-17319636013.20 ppb
2016-05-17319644012.70 ppb
2016-05-17319645010.900 ppb
2016-05-17319650010.800 ppb
2016-05-17319651010.600 ppb
2016-05-17319661010.500 ppb
2016-05-17319663010.600 ppb
2016-05-17319664010.500 ppb
2016-08-16330167014.30 ppb
2016-08-16330170016.10 ppb
2016-08-16330171016.20 ppb
2016-08-16330176014.30 ppb
2016-08-16330177013.10 ppb
2016-08-16330179011.10 ppb
2016-08-16330185011.000 ppb
2016-08-16330186011.20 ppb
2016-08-16330195011.000 ppb
2016-08-16330198011.50 ppb
2016-08-16330199011.60 ppb
2016-08-16330168017.20 ppb
2016-08-16330178013.00 ppb
2016-08-16330184011.10 ppb
2016-08-16330196011.10 ppb
2016-08-16330197011.50 ppb
2016-11-10337031016.10 ppb
2016-11-10337032017.80 ppb
2016-11-10337040014.40 ppb
2016-11-10337049011.30 ppb
2016-11-10337060012.90 ppb
2016-11-10337063011.40 ppb
2016-11-10337034017.80 ppb
2016-11-10337035016.00 ppb
2016-11-10337041015.10 ppb
2016-11-10337042013.50 ppb
2016-11-10337043012.60 ppb
2016-11-10337048011.30 ppb
2016-11-10337050010.700 ppb
2016-11-10337059014.10 ppb
2016-11-10337061018.50 ppb
2016-11-10337062013.80 ppb
2017-02-02345672013.20 ppb
2017-02-02345673013.10 ppb
2017-02-023456780111.0 ppb
2017-02-02345691017.70 ppb
2017-02-02345692018.00 ppb
2017-02-02345693017.70 ppb
2017-02-023456790110.9 ppb
2017-02-02345689019.50 ppb
2017-02-023456900111.1 ppb
2017-02-02345665013.20 ppb
2017-02-02345670012.80 ppb
2017-02-02345671013.40 ppb
2017-02-02345661012.90 ppb
2017-02-02345662013.30 ppb
2017-02-02345664013.10 ppb
2017-02-16349543011.30 ppb
2017-05-25354028014.80 ppb
2017-05-25354033015.80 ppb
2017-05-25354034015.30 ppb
2017-05-25354036010.600 ppb
2017-05-2535404101ND
2017-05-2535405301ND
2017-05-2535405401ND
2017-05-25354058010.600 ppb
2017-05-25354024015.00 ppb
2017-05-25354025012.90 ppb
2017-05-25354027015.00 ppb
2017-05-25354035014.70 ppb
2017-05-25354042010.600 ppb
2017-05-25354043010.500 ppb
2017-05-2535405501ND
2017-05-2535405601ND
2017-08-17365723017.90 ppb
2017-08-17365725017.50 ppb
2017-08-17365726017.90 ppb
2017-08-17365731014.90 ppb
2017-08-17365733012.80 ppb
2017-08-17365737010.600 ppb
2017-08-1736573801ND
2017-08-1736574801ND
2017-08-17365722016.30 ppb
2017-08-17365730017.70 ppb
2017-08-17365732015.00 ppb
2017-08-17365739010.700 ppb
2017-08-1736574701ND
2017-08-17365749010.600 ppb
2017-08-1736575001ND
2017-08-1736575101ND
2017-11-09376608015.90 ppb
2017-11-09376609015.60 ppb
2017-11-09376614014.10 ppb
2017-11-09376616013.00 ppb
2017-11-09376621014.00 ppb
2017-11-09376622010.700 ppb
2017-11-09376632011.000 ppb
2017-11-09376605014.60 ppb
2017-11-09376606015.50 ppb
2017-11-09376613014.20 ppb
2017-11-09376615013.30 ppb
2017-11-093766200113.4 ppb
2017-11-09376630011.40 ppb
2017-11-09376631011.90 ppb
2017-11-09376633011.000 ppb
2017-11-0937663401ND
2018-02-14385835013.30 ppb
2018-02-14385836012.60 ppb
2018-02-14385838012.60 ppb
2018-02-14385839012.70 ppb
2018-02-14385843013.30 ppb
2018-02-14385844012.80 ppb
2018-02-14385845013.60 ppb
2018-02-14385846017.30 ppb
2018-02-14385850019.10 ppb
2018-02-143858510111.7 ppb
2018-02-143858520111.1 ppb
2018-02-143858600114.3 ppb
2018-02-143858610111.3 ppb
2018-02-143858620113.4 ppb
2018-02-143858630110.3 ppb
2018-02-143858640113.5 ppb
2018-05-10393451013.00 ppb
2018-05-10393452012.60 ppb
2018-05-10393454012.50 ppb
2018-05-10393455013.00 ppb
2018-05-10393459013.40 ppb
2018-05-10393460012.90 ppb
2018-05-10393461013.10 ppb
2018-05-1039346201ND
2018-05-10393466012.30 ppb
2018-05-10393467012.20 ppb
2018-05-10393468014.20 ppb
2018-05-1039347701ND
2018-05-1039347801ND
2018-05-10393479011.000 ppb
2018-05-10393480012.00 ppb
2018-05-10393481011.30 ppb
2018-08-14405608017.80 ppb
2018-08-14405609017.60 ppb
2018-08-14405611017.20 ppb
2018-08-14405612017.50 ppb
2018-08-14405616018.50 ppb
2018-08-14405617017.70 ppb
2018-08-14405618013.10 ppb
2018-08-14405619015.70 ppb
2018-08-14405623010.700 ppb
2018-08-14405624010.500 ppb
2018-08-14405625010.600 ppb
2018-08-1440563301ND
2018-08-1440563401ND
2018-08-14405635010.600 ppb
2018-08-1440563601ND
2018-08-1440563701ND
2018-11-06417889013.70 ppb
2018-11-06417890014.90 ppb
2018-11-06417892015.00 ppb
2018-11-06417893014.80 ppb
2018-11-06417897013.00 ppb
2018-11-06417898013.00 ppb
2018-11-06417899014.00 ppb
2018-11-06417900016.20 ppb
2018-11-064179040111.5 ppb
2018-11-064179050112.5 ppb
2018-11-064179060112.6 ppb
2018-11-06417914011.70 ppb
2018-11-06417915011.000 ppb
2018-11-06417916011.40 ppb
2018-11-06417917014.50 ppb
2018-11-06417918011.50 ppb
2019-03-12431993013.50 ppb
2019-03-12431994013.50 ppb
2019-03-12431995013.60 ppb
2019-03-12431996013.60 ppb
2019-03-12432002012.20 ppb
2019-03-12432003012.50 ppb
2019-03-12432004012.50 ppb
2019-03-12432005013.90 ppb
2019-03-124320150110.1 ppb
2019-03-124320160110.00 ppb
2019-03-124320170110.1 ppb
2019-03-12432029010.500 ppb
2019-03-12432030011.70 ppb
2019-03-12432031010.900 ppb
2019-03-12432032010.600 ppb
2019-03-12432033011.20 ppb
2019-06-12445828015.10 ppb
2019-06-12445829015.10 ppb
2019-06-12445830014.70 ppb
2019-06-12445831015.10 ppb
2019-06-12445840013.70 ppb
2019-06-12445841012.60 ppb
2019-06-12445842014.90 ppb
2019-06-12445843015.00 ppb
2019-06-12445855010.600 ppb
2019-06-1244585601ND
2019-06-12445857010.600 ppb
2019-06-1244591501ND
2019-06-12445916010.600 ppb
2019-06-12445917010.500 ppb
2019-06-1244591801ND
2019-06-12445919010.500 ppb
2019-09-12463876019.20 ppb
2019-09-12463877019.60 ppb
2019-09-12463878019.30 ppb
2019-09-12463879019.50 ppb
2019-09-12463888015.80 ppb
2019-09-1246388901ND
2019-09-12463890015.60 ppb
2019-09-12463893016.00 ppb
2019-09-12463904010.700 ppb
2019-09-12463905010.700 ppb
2019-09-12463906010.600 ppb
2019-09-12463915010.500 ppb
2019-09-12463916010.600 ppb
2019-09-1246391701ND
2019-09-12463918010.600 ppb
2019-09-1246391901ND
2019-12-10475317012.80 ppb
2019-12-10475318013.30 ppb
2019-12-10475319013.30 ppb
2019-12-10475320013.30 ppb
2019-12-10475327013.30 ppb
2019-12-10475328012.90 ppb
2019-12-10475329012.70 ppb
2019-12-10475330012.90 ppb
2019-12-104753400115.3 ppb
2019-12-104753410111.9 ppb
2019-12-104753420114.5 ppb
2019-12-10475349013.50 ppb
2019-12-10475350013.70 ppb
2019-12-10475351014.80 ppb
2019-12-10475352012.00 ppb
2019-12-10475353013.00 ppb