Know Your Environment. Protect Your Health.

Bromoform

South Grafton Water District

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.

 

99

Samples

0

Samples exceeding legal limit (MCL)

76

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.26 ppb26260.600 ppb - 3.50 ppb
20191.82 ppb24240.550 ppb - 9.70 ppb
20201.07 ppb880.610 ppb - 2.30 ppb
20211.44 ppb660.540 ppb - 2.00 ppb
20221.56 ppb74ND - 6.80 ppb
20230.396 ppb288ND - 2.00 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 Result
2018-01-080.600 ppb
2018-01-080.600 ppb
2018-02-050.620 ppb
2018-02-050.620 ppb
2018-03-050.780 ppb
2018-03-050.780 ppb
2018-04-023.50 ppb
2018-04-020.600 ppb
2018-04-020.600 ppb
2018-04-020.820 ppb
2018-04-020.820 ppb
2018-04-023.50 ppb
2018-05-070.860 ppb
2018-05-070.860 ppb
2018-07-090.810 ppb
2018-07-090.810 ppb
2018-08-061.80 ppb
2018-08-061.80 ppb
2018-09-042.00 ppb
2018-09-042.00 ppb
2018-10-091.20 ppb
2018-10-091.20 ppb
2018-11-191.30 ppb
2018-11-191.30 ppb
2018-12-031.50 ppb
2018-12-031.50 ppb
2019-01-071.000 ppb
2019-01-071.000 ppb
2019-02-041.50 ppb
2019-02-041.50 ppb
2019-03-051.30 ppb
2019-03-051.30 ppb
2019-04-021.10 ppb
2019-04-021.10 ppb
2019-05-061.40 ppb
2019-05-060.780 ppb
2019-05-060.780 ppb
2019-05-061.40 ppb
2019-06-030.700 ppb
2019-06-030.700 ppb
2019-08-059.70 ppb
2019-08-059.70 ppb
2019-09-030.890 ppb
2019-09-030.890 ppb
2019-11-042.00 ppb
2019-11-042.00 ppb
2019-11-040.900 ppb
2019-11-040.900 ppb
2019-12-090.550 ppb
2019-12-090.550 ppb
2020-05-042.30 ppb
2020-05-041.20 ppb
2020-05-040.610 ppb
2020-05-040.670 ppb
2020-07-070.700 ppb
2020-08-031.40 ppb
2020-09-010.850 ppb
2020-11-020.800 ppb
2021-01-220.540 ppb
2021-02-011.80 ppb
2021-05-101.50 ppb
2021-05-101.20 ppb
2021-08-021.60 ppb
2021-11-012.00 ppb
2022-02-070.600 ppb
2022-05-021.90 ppb
2022-08-011.60 ppb
2022-09-06ND
2022-10-03ND
2022-11-07ND
2022-11-076.80 ppb
2023-02-06ND
2023-02-061.10 ppb
2023-02-061.30 ppb
2023-02-06ND
2023-03-06ND
2023-03-06ND
2023-04-03ND
2023-04-03ND
2023-05-01ND
2023-05-01ND
2023-05-011.10 ppb
2023-05-01ND
2023-05-011.60 ppb
2023-06-12ND
2023-06-12ND
2023-07-10ND
2023-07-10ND
2023-08-07ND
2023-08-07ND
2023-08-071.000 ppb
2023-08-071.30 ppb
2023-09-05ND
2023-09-05ND
2023-10-02ND
2023-11-06ND
2023-11-061.70 ppb
2023-11-062.00 ppb
2023-12-04ND