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.
288
Samples
0
Samples exceeding legal limit (MCL)
172
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 48 | 0 | ND |
| 2015 | 0.400 ppb | 48 | 12 | ND - 3.30 ppb |
| 2016 | 1.02 ppb | 48 | 40 | ND - 1.90 ppb |
| 2017 | 0.741 ppb | 48 | 24 | ND - 2.80 ppb |
| 2018 | 1.57 ppb | 48 | 48 | 0.790 ppb - 3.10 ppb |
| 2019 | 2.22 ppb | 48 | 48 | 0.830 ppb - 8.50 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.2 ppb
The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.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 |
|---|---|---|
| 2014-01-10 | L0038767-02 | ND |
| 2014-01-10 | L0038767-03 | ND |
| 2014-01-10 | L0038767-04 | ND |
| 2014-01-10 | L0038767-05 | ND |
| 2014-01-10 | L0038767-06 | ND |
| 2014-01-10 | L0038767-02 | ND |
| 2014-01-10 | L0038767-03 | ND |
| 2014-01-10 | L0038767-04 | ND |
| 2014-01-10 | L0038767-05 | ND |
| 2014-01-10 | L0038767-06 | ND |
| 2014-01-11 | L0038767-01 | ND |
| 2014-01-11 | L0038767-01 | ND |
| 2014-04-07 | L0041834-01 | ND |
| 2014-04-07 | L0041834-02 | ND |
| 2014-04-07 | L0041834-03 | ND |
| 2014-04-07 | L0041834-04 | ND |
| 2014-04-07 | L0041834-05 | ND |
| 2014-04-07 | L0041834-06 | ND |
| 2014-04-07 | L0041834-01 | ND |
| 2014-04-07 | L0041834-02 | ND |
| 2014-04-07 | L0041834-03 | ND |
| 2014-04-07 | L0041834-04 | ND |
| 2014-04-07 | L0041834-05 | ND |
| 2014-04-07 | L0041834-06 | ND |
| 2014-07-09 | L0045851-01 | ND |
| 2014-07-09 | L0045851-02 | ND |
| 2014-07-09 | L0045851-03 | ND |
| 2014-07-09 | L0045851-04 | ND |
| 2014-07-09 | L0045851-05 | ND |
| 2014-07-09 | L0045851-06 | ND |
| 2014-07-09 | L0045851-01 | ND |
| 2014-07-09 | L0045851-02 | ND |
| 2014-07-09 | L0045851-03 | ND |
| 2014-07-09 | L0045851-04 | ND |
| 2014-07-09 | L0045851-05 | ND |
| 2014-07-09 | L0045851-06 | ND |
| 2014-10-10 | L0049360-01 | ND |
| 2014-10-10 | L0049360-02 | ND |
| 2014-10-10 | L0049360-03 | ND |
| 2014-10-10 | L0049360-05 | ND |
| 2014-10-10 | L0049360-06 | ND |
| 2014-10-10 | L0049360-01 | ND |
| 2014-10-10 | L0049360-02 | ND |
| 2014-10-10 | L0049360-03 | ND |
| 2014-10-10 | L0049360-05 | ND |
| 2014-10-10 | L0049360-06 | ND |
| 2014-10-11 | L0049360-04 | ND |
| 2014-10-11 | L0049360-04 | ND |
| 2015-01-09 | L0052948-01 | ND |
| 2015-01-09 | L0052948-04 | ND |
| 2015-01-09 | L0052948-06 | ND |
| 2015-01-09 | L0052948-01 | ND |
| 2015-01-09 | L0052948-04 | ND |
| 2015-01-09 | L0052948-06 | ND |
| 2015-01-10 | L0052948-02 | ND |
| 2015-01-10 | L0052948-03 | ND |
| 2015-01-10 | L0052948-05 | ND |
| 2015-01-10 | L0052948-02 | ND |
| 2015-01-10 | L0052948-03 | ND |
| 2015-01-10 | L0052948-05 | ND |
| 2015-04-10 | LA5900-3 | ND |
| 2015-04-10 | LA5900-4 | ND |
| 2015-04-10 | LA5900-5 | ND |
| 2015-04-10 | LA5900-6 | 0.880 ppb |
| 2015-04-10 | LA5900-3 | ND |
| 2015-04-10 | LA5900-4 | ND |
| 2015-04-10 | LA5900-5 | ND |
| 2015-04-10 | LA5900-6 | 0.880 ppb |
| 2015-04-11 | LA5900-1 | 3.30 ppb |
| 2015-04-11 | LA5900-2 | ND |
| 2015-04-11 | LA5900-1 | 3.30 ppb |
| 2015-04-11 | LA5900-2 | ND |
| 2015-07-14 | LA9484-1 | ND |
| 2015-07-14 | LA9484-2 | ND |
| 2015-07-14 | LA9484-3 | ND |
| 2015-07-14 | LA9484-4 | ND |
| 2015-07-14 | LA9484-5 | ND |
| 2015-07-14 | LA9484-6 | ND |
| 2015-07-14 | LA9484-1 | ND |
| 2015-07-14 | LA9484-2 | ND |
| 2015-07-14 | LA9484-3 | ND |
| 2015-07-14 | LA9484-4 | ND |
| 2015-07-14 | LA9484-5 | ND |
| 2015-07-14 | LA9484-6 | ND |
| 2015-10-12 | LA12747-1 | 2.40 ppb |
| 2015-10-12 | LA12747-2 | ND |
| 2015-10-12 | LA12747-3 | ND |
| 2015-10-12 | LA12747-4 | 1.000 ppb |
| 2015-10-12 | LA12747-5 | 0.820 ppb |
| 2015-10-12 | LA12747-6 | 1.20 ppb |
| 2015-10-12 | LA12747-1 | 2.40 ppb |
| 2015-10-12 | LA12747-2 | ND |
| 2015-10-12 | LA12747-3 | ND |
| 2015-10-12 | LA12747-4 | 1.000 ppb |
| 2015-10-12 | LA12747-5 | 0.820 ppb |
| 2015-10-12 | LA12747-6 | 1.20 ppb |
| 2016-01-11 | LA16317-1 | 1.50 ppb |
| 2016-01-11 | LA16317-2 | 1.10 ppb |
| 2016-01-11 | LA16317-3 | 1.60 ppb |
| 2016-01-11 | LA16317-4 | 1.90 ppb |
| 2016-01-11 | LA16317-5 | 1.70 ppb |
| 2016-01-11 | LA16317-6 | 1.60 ppb |
| 2016-01-11 | LA16317-1 | 1.50 ppb |
| 2016-01-11 | LA16317-2 | 1.10 ppb |
| 2016-01-11 | LA16317-3 | 1.60 ppb |
| 2016-01-11 | LA16317-4 | 1.90 ppb |
| 2016-01-11 | LA16317-5 | 1.70 ppb |
| 2016-01-11 | LA16317-6 | 1.60 ppb |
| 2016-04-11 | LA19308-1 | 1.40 ppb |
| 2016-04-11 | LA19308-2 | 1.000 ppb |
| 2016-04-11 | LA19308-3 | 1.000 ppb |
| 2016-04-11 | LA19308-4 | 0.830 ppb |
| 2016-04-11 | LA19308-5 | 1.50 ppb |
| 2016-04-11 | LA19308-6 | 0.960 ppb |
| 2016-04-11 | LA19308-1 | 1.40 ppb |
| 2016-04-11 | LA19308-2 | 1.000 ppb |
| 2016-04-11 | LA19308-3 | 1.000 ppb |
| 2016-04-11 | LA19308-4 | 0.830 ppb |
| 2016-04-11 | LA19308-5 | 1.50 ppb |
| 2016-04-11 | LA19308-6 | 0.960 ppb |
| 2016-07-12 | LA22986-1 | 0.940 ppb |
| 2016-07-12 | LA22986-2 | ND |
| 2016-07-12 | LA22986-3 | ND |
| 2016-07-12 | LA22986-4 | 0.990 ppb |
| 2016-07-12 | LA22986-5 | 1.20 ppb |
| 2016-07-12 | LA22986-6 | 0.910 ppb |
| 2016-07-12 | LA22986-1 | 0.940 ppb |
| 2016-07-12 | LA22986-2 | ND |
| 2016-07-12 | LA22986-3 | ND |
| 2016-07-12 | LA22986-4 | 0.990 ppb |
| 2016-07-12 | LA22986-5 | 1.20 ppb |
| 2016-07-12 | LA22986-6 | 0.910 ppb |
| 2016-10-12 | LA26681-1 | 1.30 ppb |
| 2016-10-12 | LA26681-2 | ND |
| 2016-10-12 | LA26681-3 | ND |
| 2016-10-12 | LA26681-4 | 0.970 ppb |
| 2016-10-12 | LA26681-5 | 1.30 ppb |
| 2016-10-12 | LA26681-6 | 0.890 ppb |
| 2016-10-12 | LA26681-1 | 1.30 ppb |
| 2016-10-12 | LA26681-2 | ND |
| 2016-10-12 | LA26681-3 | ND |
| 2016-10-12 | LA26681-4 | 0.970 ppb |
| 2016-10-12 | LA26681-5 | 1.30 ppb |
| 2016-10-12 | LA26681-6 | 0.890 ppb |
| 2017-01-12 | 35289032001 | ND |
| 2017-01-12 | 35289032002 | ND |
| 2017-01-12 | 35289032003 | ND |
| 2017-01-12 | 35289032004 | 1.000 ppb |
| 2017-01-12 | 35289032001 | ND |
| 2017-01-12 | 35289032002 | ND |
| 2017-01-12 | 35289032003 | ND |
| 2017-01-12 | 35289032004 | 1.000 ppb |
| 2017-01-13 | 35289034001 | 1.40 ppb |
| 2017-01-13 | 35289034002 | 2.80 ppb |
| 2017-01-13 | 35289034001 | 1.40 ppb |
| 2017-01-13 | 35289034002 | 2.80 ppb |
| 2017-04-13 | 35306502001 | 1.10 ppb |
| 2017-04-13 | 35306502002 | ND |
| 2017-04-13 | 35306502003 | ND |
| 2017-04-13 | 35306502004 | ND |
| 2017-04-13 | 35306502005 | ND |
| 2017-04-13 | 35306502006 | ND |
| 2017-04-13 | 35306502001 | 1.10 ppb |
| 2017-04-13 | 35306502002 | ND |
| 2017-04-13 | 35306502003 | ND |
| 2017-04-13 | 35306502004 | ND |
| 2017-04-13 | 35306502005 | ND |
| 2017-04-13 | 35306502006 | ND |
| 2017-07-13 | 35324177015 | 1.60 ppb |
| 2017-07-13 | 35324177016 | ND |
| 2017-07-13 | 35324177017 | ND |
| 2017-07-13 | 35324177018 | ND |
| 2017-07-13 | 35324177019 | 0.710 ppb |
| 2017-07-13 | 35324177020 | ND |
| 2017-07-13 | 35324177015 | 1.60 ppb |
| 2017-07-13 | 35324177016 | ND |
| 2017-07-13 | 35324177017 | ND |
| 2017-07-13 | 35324177018 | ND |
| 2017-07-13 | 35324177019 | 0.710 ppb |
| 2017-07-13 | 35324177020 | ND |
| 2017-10-06 | 35340512001 | 1.60 ppb |
| 2017-10-06 | 35340512002 | 1.10 ppb |
| 2017-10-06 | 35340512003 | 2.00 ppb |
| 2017-10-06 | 35340512004 | 2.20 ppb |
| 2017-10-06 | 35340512005 | 0.580 ppb |
| 2017-10-06 | 35340512006 | 1.70 ppb |
| 2017-10-06 | 35340512001 | 1.60 ppb |
| 2017-10-06 | 35340512002 | 1.10 ppb |
| 2017-10-06 | 35340512003 | 2.00 ppb |
| 2017-10-06 | 35340512004 | 2.20 ppb |
| 2017-10-06 | 35340512005 | 0.580 ppb |
| 2017-10-06 | 35340512006 | 1.70 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 |
| 2018-01-12 | 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 |