Know Your Environment. Protect Your Health.

Bromoform

Zachary Water System

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.

 

128

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND320ND
20190.0656 ppb324ND - 0.580 ppb
20200.266 ppb169ND - 0.640 ppb
20210.179 ppb166ND - 0.620 ppb
20220.184 ppb164ND - 0.850 ppb
20230.461 ppb168ND - 3.20 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform is based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development .

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-0135371906001ND
2018-02-0135371906002ND
2018-02-0135371906003ND
2018-02-0135371906004ND
2018-02-0135371906001ND
2018-02-0135371906002ND
2018-02-0135371906003ND
2018-02-0135371906004ND
2018-05-0435390335001ND
2018-05-0435390335002ND
2018-05-0435390335003ND
2018-05-0435390335004ND
2018-05-0435390335001ND
2018-05-0435390335002ND
2018-05-0435390335003ND
2018-05-0435390335004ND
2018-08-1735412007001ND
2018-08-1735412007002ND
2018-08-1735412007003ND
2018-08-1735412007004ND
2018-08-1735412007001ND
2018-08-1735412007002ND
2018-08-1735412007003ND
2018-08-1735412007004ND
2018-11-0235428205001ND
2018-11-0235428205002ND
2018-11-0235428205003ND
2018-11-0235428205004ND
2018-11-0235428205001ND
2018-11-0235428205002ND
2018-11-0235428205003ND
2018-11-0235428205004ND
2019-02-0135445755001ND
2019-02-0135445755002ND
2019-02-0135445755003ND
2019-02-0135445755004ND
2019-02-0135445755001ND
2019-02-0135445755002ND
2019-02-0135445755003ND
2019-02-0135445755004ND
2019-05-0135465408001ND
2019-05-0135465408002ND
2019-05-0135465408003ND
2019-05-01354654080040.580 ppb
2019-05-0135465408001ND
2019-05-0135465408002ND
2019-05-0135465408003ND
2019-05-01354654080040.580 ppb
2019-08-1935493980001ND
2019-08-1935493980002ND
2019-08-1935493980003ND
2019-08-19354939800040.470 ppb
2019-08-1935493980001ND
2019-08-1935493980002ND
2019-08-1935493980003ND
2019-08-19354939800040.470 ppb
2019-11-0535510875001ND
2019-11-0535510875002ND
2019-11-0535510875003ND
2019-11-0535510875004ND
2019-11-0535510875001ND
2019-11-0535510875002ND
2019-11-0535510875003ND
2019-11-0535510875004ND
2020-02-0335529349001ND
2020-02-0335529349002ND
2020-02-0335529349003ND
2020-02-0335529349004ND
2020-05-04355480190010.440 ppb
2020-05-0435548019002ND
2020-05-0435548019003ND
2020-05-04355480190040.540 ppb
2020-08-03355680150010.500 ppb
2020-08-03355680150020.410 ppb
2020-08-03355680150030.460 ppb
2020-08-03355680150040.460 ppb
2020-11-04355905280010.400 ppb
2020-11-04355905280020.410 ppb
2020-11-0435590528003ND
2020-11-04355905280040.640 ppb
2021-02-01356100660010.440 ppb
2021-02-01356100660020.520 ppb
2021-02-01356100660030.620 ppb
2021-02-0135610066004ND
2021-05-0335631689001ND
2021-05-0335631689002ND
2021-05-0335631689003ND
2021-05-0335631689004ND
2021-08-02356543060010.370 ppb
2021-08-0235654306002ND
2021-08-02356543060030.410 ppb
2021-08-02356543060040.500 ppb
2021-11-0235676642001ND
2021-11-0235676642002ND
2021-11-0235676642003ND
2021-11-0235676642004ND
2022-02-02356966770010.800 ppb
2022-02-0235696677002ND
2022-02-0235696677003ND
2022-02-0235696677004ND
2022-05-0235715431001ND
2022-05-0235715431002ND
2022-05-0235715431003ND
2022-05-02357154310040.720 ppb
2022-08-01357369730010.850 ppb
2022-08-0135736973002ND
2022-08-0135736973003ND
2022-08-0135736973004ND
2022-11-0135758147001ND
2022-11-0135758147002ND
2022-11-0135758147003ND
2022-11-01357581470040.570 ppb
2023-02-06357781730010.940 ppb
2023-02-0635778173002ND
2023-02-0635778173003ND
2023-02-06357781730040.530 ppb
2023-05-08357989880010.550 ppb
2023-05-0835798988002ND
2023-05-0835798988003ND
2023-05-08357989880040.630 ppb
2023-08-01358177240013.20 ppb
2023-08-01358177240020.410 ppb
2023-08-0135817724003ND
2023-08-0135817724004ND
2023-11-06358405320010.560 ppb
2023-11-0635840532002ND
2023-11-0635840532003ND
2023-11-06358405320040.550 ppb