Bromoform
Lafayette Utilities 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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.975 ppb | 48 | 28 | ND - 3.90 ppb |
| 2019 | 1.30 ppb | 48 | 48 | 0.700 ppb - 3.60 ppb |
| 2020 | 0.917 ppb | 24 | 19 | ND - 4.20 ppb |
| 2021 | 0.927 ppb | 24 | 16 | ND - 3.90 ppb |
| 2022 | 1.64 ppb | 24 | 23 | ND - 9.30 ppb |
| 2023 | 1.88 ppb | 24 | 24 | 0.490 ppb - 8.80 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 |
|---|---|---|
| 2018-01-12 | 35368396001 | ND |
| 2018-01-12 | 35368396002 | 1.80 ppb |
| 2018-01-12 | 35368396003 | ND |
| 2018-01-12 | 35368396004 | 1.10 ppb |
| 2018-01-12 | 35368396005 | 1.20 ppb |
| 2018-01-12 | 35368396006 | 1.20 ppb |
| 2018-01-12 | 35368396001 | ND |
| 2018-01-12 | 35368396002 | 1.80 ppb |
| 2018-01-12 | 35368396003 | ND |
| 2018-01-12 | 35368396004 | 1.10 ppb |
| 2018-01-12 | 35368396005 | 1.20 ppb |
| 2018-01-12 | 35368396006 | 1.20 ppb |
| 2018-04-05 | 35384677001 | 1.30 ppb |
| 2018-04-05 | 35384677002 | ND |
| 2018-04-05 | 35384677003 | ND |
| 2018-04-05 | 35384677004 | ND |
| 2018-04-05 | 35384677005 | ND |
| 2018-04-05 | 35384677006 | 1.10 ppb |
| 2018-04-05 | 35384677001 | 1.30 ppb |
| 2018-04-05 | 35384677002 | ND |
| 2018-04-05 | 35384677003 | ND |
| 2018-04-05 | 35384677004 | ND |
| 2018-04-05 | 35384677005 | ND |
| 2018-04-05 | 35384677006 | 1.10 ppb |
| 2018-07-31 | 35407898001 | 1.60 ppb |
| 2018-07-31 | 35407898002 | 2.00 ppb |
| 2018-07-31 | 35407898003 | 1.20 ppb |
| 2018-07-31 | 35407898004 | 1.60 ppb |
| 2018-07-31 | 35407898005 | 2.10 ppb |
| 2018-07-31 | 35407898006 | 1.20 ppb |
| 2018-07-31 | 35407898001 | 1.60 ppb |
| 2018-07-31 | 35407898002 | 2.00 ppb |
| 2018-07-31 | 35407898003 | 1.20 ppb |
| 2018-07-31 | 35407898004 | 1.60 ppb |
| 2018-07-31 | 35407898005 | 2.10 ppb |
| 2018-07-31 | 35407898006 | 1.20 ppb |
| 2018-10-18 | 35425428001 | ND |
| 2018-10-18 | 35425428002 | 2.10 ppb |
| 2018-10-18 | 35425428003 | ND |
| 2018-10-18 | 35425428004 | ND |
| 2018-10-18 | 35425428005 | 3.90 ppb |
| 2018-10-18 | 35425428006 | ND |
| 2018-10-18 | 35425428001 | ND |
| 2018-10-18 | 35425428002 | 2.10 ppb |
| 2018-10-18 | 35425428003 | ND |
| 2018-10-18 | 35425428004 | ND |
| 2018-10-18 | 35425428005 | 3.90 ppb |
| 2018-10-18 | 35425428006 | ND |
| 2019-01-10 | 35441863001 | 0.750 ppb |
| 2019-01-10 | 35441863002 | 1.50 ppb |
| 2019-01-10 | 35441863003 | 1.10 ppb |
| 2019-01-10 | 35441863004 | 0.700 ppb |
| 2019-01-10 | 35441863005 | 1.40 ppb |
| 2019-01-10 | 35441863006 | 0.780 ppb |
| 2019-01-10 | 35441863001 | 0.750 ppb |
| 2019-01-10 | 35441863002 | 1.50 ppb |
| 2019-01-10 | 35441863003 | 1.10 ppb |
| 2019-01-10 | 35441863004 | 0.700 ppb |
| 2019-01-10 | 35441863005 | 1.40 ppb |
| 2019-01-10 | 35441863006 | 0.780 ppb |
| 2019-04-11 | 35461551001 | 0.770 ppb |
| 2019-04-11 | 35461551002 | 1.60 ppb |
| 2019-04-11 | 35461551003 | 1.20 ppb |
| 2019-04-11 | 35461551004 | 0.970 ppb |
| 2019-04-11 | 35461551005 | 1.000 ppb |
| 2019-04-11 | 35461551006 | 0.980 ppb |
| 2019-04-11 | 35461551001 | 0.770 ppb |
| 2019-04-11 | 35461551002 | 1.60 ppb |
| 2019-04-11 | 35461551003 | 1.20 ppb |
| 2019-04-11 | 35461551004 | 0.970 ppb |
| 2019-04-11 | 35461551005 | 1.000 ppb |
| 2019-04-11 | 35461551006 | 0.980 ppb |
| 2019-07-19 | 35483795001 | 1.30 ppb |
| 2019-07-19 | 35483795002 | 1.70 ppb |
| 2019-07-19 | 35483795003 | 1.10 ppb |
| 2019-07-19 | 35483795004 | 0.940 ppb |
| 2019-07-19 | 35483795005 | 3.60 ppb |
| 2019-07-19 | 35483795006 | 1.10 ppb |
| 2019-07-19 | 35483795001 | 1.30 ppb |
| 2019-07-19 | 35483795002 | 1.70 ppb |
| 2019-07-19 | 35483795003 | 1.10 ppb |
| 2019-07-19 | 35483795004 | 0.940 ppb |
| 2019-07-19 | 35483795005 | 3.60 ppb |
| 2019-07-19 | 35483795006 | 1.10 ppb |
| 2019-10-18 | 35506260001 | 0.970 ppb |
| 2019-10-18 | 35506260002 | 1.60 ppb |
| 2019-10-18 | 35506260003 | 1.30 ppb |
| 2019-10-18 | 35506260004 | 0.810 ppb |
| 2019-10-18 | 35506260005 | 3.20 ppb |
| 2019-10-18 | 35506260006 | 0.860 ppb |
| 2019-10-18 | 35506260001 | 0.970 ppb |
| 2019-10-18 | 35506260002 | 1.60 ppb |
| 2019-10-18 | 35506260003 | 1.30 ppb |
| 2019-10-18 | 35506260004 | 0.810 ppb |
| 2019-10-18 | 35506260005 | 3.20 ppb |
| 2019-10-18 | 35506260006 | 0.860 ppb |
| 2020-01-03 | 35521914001 | ND |
| 2020-01-03 | 35521914002 | ND |
| 2020-01-03 | 35521914003 | ND |
| 2020-01-03 | 35521914004 | ND |
| 2020-01-03 | 35521914005 | 1.20 ppb |
| 2020-01-03 | 35521914006 | ND |
| 2020-04-17 | 35544573001 | 0.580 ppb |
| 2020-04-17 | 35544573002 | 0.660 ppb |
| 2020-04-17 | 35544573003 | 0.430 ppb |
| 2020-04-17 | 35544573004 | 0.580 ppb |
| 2020-04-17 | 35544573005 | 1.50 ppb |
| 2020-04-17 | 35544573006 | 1.60 ppb |
| 2020-07-17 | 35564240001 | 0.360 ppb |
| 2020-07-17 | 35564240002 | 0.830 ppb |
| 2020-07-17 | 35564240003 | 0.510 ppb |
| 2020-07-17 | 35564240004 | 0.770 ppb |
| 2020-07-17 | 35564240005 | 3.90 ppb |
| 2020-07-17 | 35564240006 | 0.690 ppb |
| 2020-10-23 | 35587245001 | 0.460 ppb |
| 2020-10-23 | 35587245002 | 1.30 ppb |
| 2020-10-23 | 35587245003 | 0.910 ppb |
| 2020-10-23 | 35587245004 | 0.760 ppb |
| 2020-10-23 | 35587245005 | 4.20 ppb |
| 2020-10-23 | 35587245006 | 0.760 ppb |
| 2021-01-21 | 35606716001 | ND |
| 2021-01-21 | 35606716002 | 0.710 ppb |
| 2021-01-21 | 35606716003 | 0.870 ppb |
| 2021-01-21 | 35606716004 | 1.40 ppb |
| 2021-01-21 | 35606716005 | 1.20 ppb |
| 2021-01-21 | 35606716006 | 1.40 ppb |
| 2021-04-15 | 35626825001 | ND |
| 2021-04-15 | 35626825002 | 0.570 ppb |
| 2021-04-15 | 35626825003 | 0.730 ppb |
| 2021-04-15 | 35626825004 | 0.750 ppb |
| 2021-04-15 | 35626825005 | 1.80 ppb |
| 2021-04-15 | 35626825006 | 0.800 ppb |
| 2021-07-16 | 35648545001 | ND |
| 2021-07-16 | 35648545002 | 2.00 ppb |
| 2021-07-16 | 35648545003 | 1.40 ppb |
| 2021-07-16 | 35648545004 | 0.880 ppb |
| 2021-07-16 | 35648545005 | 3.00 ppb |
| 2021-07-16 | 35648545006 | 0.840 ppb |
| 2021-10-08 | 35670558001 | ND |
| 2021-10-08 | 35670558002 | ND |
| 2021-10-08 | 35670558003 | ND |
| 2021-10-08 | 35670558004 | ND |
| 2021-10-08 | 35670558005 | 3.90 ppb |
| 2021-10-08 | 35670558006 | ND |
| 2022-01-07 | 35689217001 | ND |
| 2022-01-07 | 35689217002 | 0.560 ppb |
| 2022-01-07 | 35689217003 | 0.450 ppb |
| 2022-01-07 | 35689217004 | 0.710 ppb |
| 2022-01-07 | 35689217005 | 2.80 ppb |
| 2022-01-07 | 35689217006 | 0.750 ppb |
| 2022-04-01 | 35707491001 | 0.810 ppb |
| 2022-04-01 | 35707491002 | 1.60 ppb |
| 2022-04-01 | 35707491003 | 1.30 ppb |
| 2022-04-01 | 35707491004 | 1.10 ppb |
| 2022-04-01 | 35707491005 | 1.30 ppb |
| 2022-04-01 | 35707491006 | 5.00 ppb |
| 2022-07-14 | 35731989001 | 0.500 ppb |
| 2022-07-14 | 35731989002 | 0.730 ppb |
| 2022-07-14 | 35731989003 | 0.440 ppb |
| 2022-07-14 | 35731989004 | 0.840 ppb |
| 2022-07-14 | 35731989005 | 4.40 ppb |
| 2022-07-14 | 35731989006 | 0.940 ppb |
| 2022-10-07 | 35751863001 | 0.670 ppb |
| 2022-10-07 | 35751863002 | 2.00 ppb |
| 2022-10-07 | 35751863003 | 1.50 ppb |
| 2022-10-07 | 35751863004 | 0.840 ppb |
| 2022-10-07 | 35751863005 | 9.30 ppb |
| 2022-10-07 | 35751863006 | 0.870 ppb |
| 2023-01-12 | 35772807001 | 0.490 ppb |
| 2023-01-12 | 35772807002 | 1.50 ppb |
| 2023-01-12 | 35772807003 | 0.890 ppb |
| 2023-01-12 | 35772807004 | 0.830 ppb |
| 2023-01-12 | 35772807005 | 3.00 ppb |
| 2023-01-12 | 35772807006 | 0.970 ppb |
| 2023-04-14 | 35792900001 | 0.960 ppb |
| 2023-04-14 | 35792900002 | 1.60 ppb |
| 2023-04-14 | 35792900003 | 1.20 ppb |
| 2023-04-14 | 35792900004 | 0.940 ppb |
| 2023-04-14 | 35792900005 | 8.80 ppb |
| 2023-04-14 | 35792900006 | 1.000 ppb |
| 2023-07-07 | 35811436001 | 0.590 ppb |
| 2023-07-07 | 35811436002 | 1.70 ppb |
| 2023-07-07 | 35811436003 | 1.10 ppb |
| 2023-07-07 | 35811436004 | 0.790 ppb |
| 2023-07-07 | 35811436005 | 5.40 ppb |
| 2023-07-07 | 35811436006 | 0.870 ppb |
| 2023-10-13 | 35834666001 | 0.690 ppb |
| 2023-10-13 | 35834666002 | 1.60 ppb |
| 2023-10-13 | 35834666003 | 1.30 ppb |
| 2023-10-13 | 35834666004 | 0.910 ppb |
| 2023-10-13 | 35834666005 | 7.00 ppb |
| 2023-10-13 | 35834666006 | 0.880 ppb |