Know Your Environment. Protect Your Health.

Dichloroacetic acid

City of Zavalla

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

32

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201810.0 ppb882.30 ppb - 25.2 ppb
20192.41 ppb85ND - 7.90 ppb
20200.775 ppb85ND - 1.70 ppb
20213.48 ppb86ND - 8.70 ppb
202221.4 ppb84ND - 55.7 ppb
20231.80 ppb84ND - 6.60 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
2018-02-12Q18056190203.30 ppb
2018-02-12Q18056190192.30 ppb
2018-05-17Q18202100065.60 ppb
2018-05-17Q182021000525.2 ppb
2018-08-15Q18329650013.60 ppb
2018-08-15Q18329650062.50 ppb
2018-12-03Q184901800118.3 ppb
2018-12-03Q184901800419.4 ppb
2019-02-11Q19060180152.20 ppb
2019-02-11Q19060180163.40 ppb
2019-04-29Q19172480017.90 ppb
2019-04-29Q19172480044.80 ppb
2019-08-21Q1957739006ND
2019-08-21Q1957739005ND
2019-11-05Q19750660051.000 ppb
2019-11-05Q1975066006ND
2020-01-22Q20025090111.000 ppb
2020-01-22Q20025090121.10 ppb
2020-04-08Q2014238005ND
2020-04-08Q2014238006ND
2020-07-14Q20276910051.70 ppb
2020-07-14Q20276910061.40 ppb
2020-10-07Q20393020051.000 ppb
2020-10-07Q2039302006ND
2021-01-12Q21008080173.20 ppb
2021-01-12Q2100808018ND
2021-04-08Q21090000078.70 ppb
2021-04-08Q21090000082.60 ppb
2021-07-28Q21197060057.80 ppb
2021-07-28Q21197060061.30 ppb
2021-10-05Q21272990054.20 ppb
2021-10-05Q2127299006ND
2022-01-05Q2200291011ND
2022-01-05Q2200291012ND
2022-04-05Q221042600555.7 ppb
2022-04-05Q221042600642.2 ppb
2022-07-08Q2219195006ND
2022-07-08Q2219195007ND
2022-10-04Q222974700540.8 ppb
2022-10-04Q222974700632.5 ppb
2023-01-09Q23008030126.60 ppb
2023-01-09Q23008030131.80 ppb
2023-05-15Q23182630012.00 ppb
2023-05-15Q2318263002ND
2023-08-07Q23321440014.00 ppb
2023-08-07Q2332144002ND
2023-10-10Q2343134005ND
2023-10-10Q2343134006ND