Dichloroacetic acid
Lafayette Utilities Water System
Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids 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 | 1.57 ppb | 48 | 48 | 0.790 ppb - 3.10 ppb |
| 2019 | 2.22 ppb | 48 | 48 | 0.830 ppb - 8.50 ppb |
| 2020 | 0.738 ppb | 24 | 18 | ND - 1.90 ppb |
| 2021 | 1.10 ppb | 24 | 23 | ND - 2.50 ppb |
| 2022 | 1.12 ppb | 24 | 20 | ND - 1.80 ppb |
| 2023 | 0.764 ppb | 24 | 18 | ND - 2.00 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.2 ppb
The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was defined by 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 and harm to reproduction and child development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-12 | 35368396001 | 1.000 ppb |
| 2018-01-12 | 35368396002 | 0.870 ppb |
| 2018-01-12 | 35368396003 | 2.10 ppb |
| 2018-01-12 | 35368396004 | 3.10 ppb |
| 2018-01-12 | 35368396005 | 1.70 ppb |
| 2018-01-12 | 35368396006 | 1.80 ppb |
| 2018-01-12 | 35368396001 | 1.000 ppb |
| 2018-01-12 | 35368396002 | 0.870 ppb |
| 2018-01-12 | 35368396003 | 2.10 ppb |
| 2018-01-12 | 35368396004 | 3.10 ppb |
| 2018-01-12 | 35368396005 | 1.70 ppb |
| 2018-01-12 | 35368396006 | 1.80 ppb |
| 2018-04-05 | 35384677001 | 1.20 ppb |
| 2018-04-05 | 35384677002 | 0.920 ppb |
| 2018-04-05 | 35384677003 | 0.810 ppb |
| 2018-04-05 | 35384677004 | 1.30 ppb |
| 2018-04-05 | 35384677005 | 2.10 ppb |
| 2018-04-05 | 35384677006 | 0.800 ppb |
| 2018-04-05 | 35384677001 | 1.20 ppb |
| 2018-04-05 | 35384677002 | 0.920 ppb |
| 2018-04-05 | 35384677003 | 0.810 ppb |
| 2018-04-05 | 35384677004 | 1.30 ppb |
| 2018-04-05 | 35384677005 | 2.10 ppb |
| 2018-04-05 | 35384677006 | 0.800 ppb |
| 2018-07-31 | 35407898001 | 2.60 ppb |
| 2018-07-31 | 35407898002 | 2.00 ppb |
| 2018-07-31 | 35407898003 | 1.80 ppb |
| 2018-07-31 | 35407898004 | 2.40 ppb |
| 2018-07-31 | 35407898005 | 2.00 ppb |
| 2018-07-31 | 35407898006 | 1.80 ppb |
| 2018-07-31 | 35407898001 | 2.60 ppb |
| 2018-07-31 | 35407898002 | 2.00 ppb |
| 2018-07-31 | 35407898003 | 1.80 ppb |
| 2018-07-31 | 35407898004 | 2.40 ppb |
| 2018-07-31 | 35407898005 | 2.00 ppb |
| 2018-07-31 | 35407898006 | 1.80 ppb |
| 2018-10-18 | 35425428001 | 1.60 ppb |
| 2018-10-18 | 35425428002 | 0.980 ppb |
| 2018-10-18 | 35425428003 | 0.790 ppb |
| 2018-10-18 | 35425428004 | 1.20 ppb |
| 2018-10-18 | 35425428005 | 1.70 ppb |
| 2018-10-18 | 35425428006 | 1.20 ppb |
| 2018-10-18 | 35425428001 | 1.60 ppb |
| 2018-10-18 | 35425428002 | 0.980 ppb |
| 2018-10-18 | 35425428003 | 0.790 ppb |
| 2018-10-18 | 35425428004 | 1.20 ppb |
| 2018-10-18 | 35425428005 | 1.70 ppb |
| 2018-10-18 | 35425428006 | 1.20 ppb |
| 2019-01-10 | 35441863001 | 2.10 ppb |
| 2019-01-10 | 35441863002 | 1.80 ppb |
| 2019-01-10 | 35441863003 | 1.70 ppb |
| 2019-01-10 | 35441863004 | 2.10 ppb |
| 2019-01-10 | 35441863005 | 2.60 ppb |
| 2019-01-10 | 35441863006 | 2.00 ppb |
| 2019-01-10 | 35441863001 | 2.10 ppb |
| 2019-01-10 | 35441863002 | 1.80 ppb |
| 2019-01-10 | 35441863003 | 1.70 ppb |
| 2019-01-10 | 35441863004 | 2.10 ppb |
| 2019-01-10 | 35441863005 | 2.60 ppb |
| 2019-01-10 | 35441863006 | 2.00 ppb |
| 2019-04-11 | 35461551001 | 1.50 ppb |
| 2019-04-11 | 35461551002 | 0.990 ppb |
| 2019-04-11 | 35461551003 | 0.890 ppb |
| 2019-04-11 | 35461551004 | 1.30 ppb |
| 2019-04-11 | 35461551005 | 2.90 ppb |
| 2019-04-11 | 35461551006 | 1.40 ppb |
| 2019-04-11 | 35461551001 | 1.50 ppb |
| 2019-04-11 | 35461551002 | 0.990 ppb |
| 2019-04-11 | 35461551003 | 0.890 ppb |
| 2019-04-11 | 35461551004 | 1.30 ppb |
| 2019-04-11 | 35461551005 | 2.90 ppb |
| 2019-04-11 | 35461551006 | 1.40 ppb |
| 2019-07-19 | 35483795001 | 3.00 ppb |
| 2019-07-19 | 35483795002 | 1.70 ppb |
| 2019-07-19 | 35483795003 | 1.60 ppb |
| 2019-07-19 | 35483795004 | 2.20 ppb |
| 2019-07-19 | 35483795005 | 2.50 ppb |
| 2019-07-19 | 35483795006 | 5.00 ppb |
| 2019-07-19 | 35483795001 | 3.00 ppb |
| 2019-07-19 | 35483795002 | 1.70 ppb |
| 2019-07-19 | 35483795003 | 1.60 ppb |
| 2019-07-19 | 35483795004 | 2.20 ppb |
| 2019-07-19 | 35483795005 | 2.50 ppb |
| 2019-07-19 | 35483795006 | 5.00 ppb |
| 2019-10-18 | 35506260001 | 1.90 ppb |
| 2019-10-18 | 35506260002 | 1.20 ppb |
| 2019-10-18 | 35506260003 | 0.830 ppb |
| 2019-10-18 | 35506260004 | 1.40 ppb |
| 2019-10-18 | 35506260005 | 2.20 ppb |
| 2019-10-18 | 35506260006 | 8.50 ppb |
| 2019-10-18 | 35506260001 | 1.90 ppb |
| 2019-10-18 | 35506260002 | 1.20 ppb |
| 2019-10-18 | 35506260003 | 0.830 ppb |
| 2019-10-18 | 35506260004 | 1.40 ppb |
| 2019-10-18 | 35506260005 | 2.20 ppb |
| 2019-10-18 | 35506260006 | 8.50 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 | ND |
| 2020-01-03 | 35521914006 | ND |
| 2020-04-17 | 35544573001 | 1.30 ppb |
| 2020-04-17 | 35544573002 | 0.620 ppb |
| 2020-04-17 | 35544573003 | 0.540 ppb |
| 2020-04-17 | 35544573004 | 0.800 ppb |
| 2020-04-17 | 35544573005 | 0.870 ppb |
| 2020-04-17 | 35544573006 | 1.90 ppb |
| 2020-07-17 | 35564240001 | 1.50 ppb |
| 2020-07-17 | 35564240002 | 0.690 ppb |
| 2020-07-17 | 35564240003 | 0.510 ppb |
| 2020-07-17 | 35564240004 | 0.740 ppb |
| 2020-07-17 | 35564240005 | 0.810 ppb |
| 2020-07-17 | 35564240006 | 0.560 ppb |
| 2020-10-23 | 35587245001 | 1.70 ppb |
| 2020-10-23 | 35587245002 | 0.860 ppb |
| 2020-10-23 | 35587245003 | 0.720 ppb |
| 2020-10-23 | 35587245004 | 1.20 ppb |
| 2020-10-23 | 35587245005 | 1.20 ppb |
| 2020-10-23 | 35587245006 | 1.20 ppb |
| 2021-01-21 | 35606716001 | 1.10 ppb |
| 2021-01-21 | 35606716002 | 0.590 ppb |
| 2021-01-21 | 35606716003 | 0.620 ppb |
| 2021-01-21 | 35606716004 | 0.850 ppb |
| 2021-01-21 | 35606716005 | 1.20 ppb |
| 2021-01-21 | 35606716006 | 0.810 ppb |
| 2021-04-15 | 35626825001 | 1.10 ppb |
| 2021-04-15 | 35626825002 | 0.730 ppb |
| 2021-04-15 | 35626825003 | ND |
| 2021-04-15 | 35626825004 | 0.910 ppb |
| 2021-04-15 | 35626825005 | 1.10 ppb |
| 2021-04-15 | 35626825006 | 0.910 ppb |
| 2021-07-16 | 35648545001 | 2.50 ppb |
| 2021-07-16 | 35648545002 | 1.30 ppb |
| 2021-07-16 | 35648545003 | 1.40 ppb |
| 2021-07-16 | 35648545004 | 1.80 ppb |
| 2021-07-16 | 35648545005 | 1.70 ppb |
| 2021-07-16 | 35648545006 | 2.00 ppb |
| 2021-10-08 | 35670558001 | 1.40 ppb |
| 2021-10-08 | 35670558002 | 0.650 ppb |
| 2021-10-08 | 35670558003 | 0.570 ppb |
| 2021-10-08 | 35670558004 | 0.960 ppb |
| 2021-10-08 | 35670558005 | 1.10 ppb |
| 2021-10-08 | 35670558006 | 0.980 ppb |
| 2022-01-07 | 35689217001 | 1.60 ppb |
| 2022-01-07 | 35689217002 | 1.30 ppb |
| 2022-01-07 | 35689217003 | 1.10 ppb |
| 2022-01-07 | 35689217004 | 1.20 ppb |
| 2022-01-07 | 35689217005 | 1.70 ppb |
| 2022-01-07 | 35689217006 | 1.20 ppb |
| 2022-04-01 | 35707491001 | 1.60 ppb |
| 2022-04-01 | 35707491002 | 1.000 ppb |
| 2022-04-01 | 35707491003 | 0.930 ppb |
| 2022-04-01 | 35707491004 | 1.40 ppb |
| 2022-04-01 | 35707491005 | 1.30 ppb |
| 2022-04-01 | 35707491006 | 1.50 ppb |
| 2022-07-14 | 35731989001 | ND |
| 2022-07-14 | 35731989002 | ND |
| 2022-07-14 | 35731989003 | ND |
| 2022-07-14 | 35731989004 | ND |
| 2022-07-14 | 35731989005 | 1.20 ppb |
| 2022-07-14 | 35731989006 | 1.80 ppb |
| 2022-10-07 | 35751863001 | 1.80 ppb |
| 2022-10-07 | 35751863002 | 1.000 ppb |
| 2022-10-07 | 35751863003 | 0.900 ppb |
| 2022-10-07 | 35751863004 | 1.40 ppb |
| 2022-10-07 | 35751863005 | 1.60 ppb |
| 2022-10-07 | 35751863006 | 1.40 ppb |
| 2023-01-12 | 35772807001 | 1.30 ppb |
| 2023-01-12 | 35772807002 | 0.580 ppb |
| 2023-01-12 | 35772807003 | 0.540 ppb |
| 2023-01-12 | 35772807004 | 1.10 ppb |
| 2023-01-12 | 35772807005 | 0.950 ppb |
| 2023-01-12 | 35772807006 | 1.20 ppb |
| 2023-04-14 | 35792900001 | 1.40 ppb |
| 2023-04-14 | 35792900002 | ND |
| 2023-04-14 | 35792900003 | ND |
| 2023-04-14 | 35792900004 | ND |
| 2023-04-14 | 35792900005 | 0.620 ppb |
| 2023-04-14 | 35792900006 | ND |
| 2023-07-07 | 35811436001 | 1.30 ppb |
| 2023-07-07 | 35811436002 | ND |
| 2023-07-07 | 35811436003 | ND |
| 2023-07-07 | 35811436004 | 1.000 ppb |
| 2023-07-07 | 35811436005 | 0.880 ppb |
| 2023-07-07 | 35811436006 | 0.900 ppb |
| 2023-10-13 | 35834666001 | 1.30 ppb |
| 2023-10-13 | 35834666002 | 0.760 ppb |
| 2023-10-13 | 35834666003 | 0.660 ppb |
| 2023-10-13 | 35834666004 | 0.950 ppb |
| 2023-10-13 | 35834666005 | 2.00 ppb |
| 2023-10-13 | 35834666006 | 0.890 ppb |