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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Santa Margarita Water District

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.

MORE ABOUT THIS CONTAMINANT

 

192

Samples

0

Samples exceeding legal limit (MCL)

155

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201410.2 ppb32321.29 ppb - 15.6 ppb
20155.34 ppb32321.64 ppb - 10.7 ppb
20162.12 ppb3223ND - 7.21 ppb
20172.77 ppb3224ND - 9.60 ppb
20181.86 ppb3224ND - 3.90 ppb
20192.48 ppb3220ND - 9.40 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
2014-01-071805-801-070015.6 ppb
2014-01-071805-802-070014.5 ppb
2014-01-071805-803-070012.1 ppb
2014-01-071805-804-070010.7 ppb
2014-01-071805-805-07007.65 ppb
2014-01-071805-806-070011.2 ppb
2014-01-071805-807-070012.9 ppb
2014-01-071805-808-070014.5 ppb
2014-04-031805-801-073014.7 ppb
2014-04-031805-802-07309.72 ppb
2014-04-031805-803-07308.65 ppb
2014-04-031805-804-073011.1 ppb
2014-04-031805-805-073012.0 ppb
2014-04-031805-806-073010.7 ppb
2014-04-031805-807-07309.74 ppb
2014-04-031805-808-07308.88 ppb
2014-07-011805-801-000012.5 ppb
2014-07-011805-802-000012.9 ppb
2014-07-011805-803-000011.5 ppb
2014-07-011805-804-000014.7 ppb
2014-07-011805-805-000015.2 ppb
2014-07-011805-806-000015.3 ppb
2014-07-011805-807-000012.0 ppb
2014-07-011805-808-000014.9 ppb
2014-10-071805-801-00001.29 ppb
2014-10-071805-802-00005.07 ppb
2014-10-071805-803-00006.37 ppb
2014-10-071805-804-00005.20 ppb
2014-10-071805-805-00002.79 ppb
2014-10-071805-806-00001.60 ppb
2014-10-071805-807-00003.86 ppb
2014-10-071805-808-00005.72 ppb
2015-01-061805-801-00004.45 ppb
2015-01-061805-802-00003.28 ppb
2015-01-061805-803-000010.7 ppb
2015-01-061805-804-00001.64 ppb
2015-01-061805-805-00008.85 ppb
2015-01-061805-806-00001.74 ppb
2015-01-061805-807-00008.52 ppb
2015-01-061805-808-00004.46 ppb
2015-04-061805-801-09495.17 ppb
2015-04-061805-802-09586.30 ppb
2015-04-061805-803-10147.60 ppb
2015-04-061805-804-10516.14 ppb
2015-04-061805-805-13332.83 ppb
2015-04-061805-806-15072.15 ppb
2015-04-061805-807-14222.97 ppb
2015-04-061805-808-08492.81 ppb
2015-07-071805-801-00008.45 ppb
2015-07-071805-802-00007.77 ppb
2015-07-071805-803-00008.19 ppb
2015-07-071805-804-00008.82 ppb
2015-07-081805-805-00004.41 ppb
2015-07-081805-806-00003.95 ppb
2015-07-081805-807-00004.52 ppb
2015-07-091805-808-00007.55 ppb
2015-10-051805-801-08424.71 ppb
2015-10-051805-802-08585.13 ppb
2015-10-051805-803-09158.59 ppb
2015-10-051805-804-09574.47 ppb
2015-10-051805-805-13313.74 ppb
2015-10-051805-806-15452.44 ppb
2015-10-051805-807-15293.76 ppb
2015-10-071805-808-11034.80 ppb
2016-01-051805-801-08505.27 ppb
2016-01-051805-802-09044.03 ppb
2016-01-051805-803-09187.21 ppb
2016-01-051805-804-09534.36 ppb
2016-01-051805-805-12394.01 ppb
2016-01-051805-806-15515.61 ppb
2016-01-051805-807-14494.07 ppb
2016-01-061805-808-12046.03 ppb
2016-04-139590-801-0938ND
2016-04-139590-802-0955ND
2016-04-139590-803-1014ND
2016-04-139590-804-15201.80 ppb
2016-04-139590-805-14301.000 ppb
2016-04-139590-806-1622ND
2016-04-139590-807-15282.60 ppb
2016-04-149590-808-10542.10 ppb
2016-07-079590-801-13301.80 ppb
2016-07-079590-802-13501.20 ppb
2016-07-079590-803-1410ND
2016-07-079590-804-14251.60 ppb
2016-07-079590-805-15001.60 ppb
2016-07-079590-806-1530ND
2016-07-079590-807-15151.80 ppb
2016-07-079590-808-12552.00 ppb
2016-10-069590-801-12032.40 ppb
2016-10-069590-802-13321.80 ppb
2016-10-069590-803-1352ND
2016-10-069590-804-10482.50 ppb
2016-10-069590-805-1113ND
2016-10-069590-806-1416ND
2016-10-069590-807-11351.10 ppb
2016-10-069590-808-10002.00 ppb
2017-01-069590-801-1002ND
2017-01-069590-802-1023ND
2017-01-069590-803-1050ND
2017-01-069590-804-11181.60 ppb
2017-01-069590-805-11401.70 ppb
2017-01-069590-806-1227ND
2017-01-069590-807-1252ND
2017-01-069590-808-11571.70 ppb
2017-04-069590-801-08505.50 ppb
2017-04-069590-802-09156.10 ppb
2017-04-069590-803-0935ND
2017-04-069590-804-09587.20 ppb
2017-04-069590-805-10308.70 ppb
2017-04-069590-806-11097.30 ppb
2017-04-069590-807-10503.50 ppb
2017-04-069590-808-09379.60 ppb
2017-07-069590-801-10323.80 ppb
2017-07-069590-802-10502.60 ppb
2017-07-069590-803-11073.10 ppb
2017-07-069590-804-12083.40 ppb
2017-07-069590-805-13002.40 ppb
2017-07-069590-806-13381.60 ppb
2017-07-069590-807-1242ND
2017-07-069590-808-08202.40 ppb
2017-10-059590-801-10423.00 ppb
2017-10-059590-802-10552.10 ppb
2017-10-059590-803-1108ND
2017-10-059590-804-11262.80 ppb
2017-10-059590-805-12251.80 ppb
2017-10-059590-806-12592.00 ppb
2017-10-059590-807-12451.80 ppb
2017-10-059590-808-08573.00 ppb
2018-01-049590-801-13302.90 ppb
2018-01-049590-802-13111.90 ppb
2018-01-049590-803-12512.20 ppb
2018-01-049590-804-12252.60 ppb
2018-01-049590-805-11571.80 ppb
2018-01-049590-806-11111.90 ppb
2018-01-049590-807-11282.00 ppb
2018-01-049590-808-08282.40 ppb
2018-04-059590-801-10093.20 ppb
2018-04-059590-802-10212.00 ppb
2018-04-059590-803-10392.40 ppb
2018-04-059590-804-10582.20 ppb
2018-04-059590-805-1329ND
2018-04-059590-806-1253ND
2018-04-059590-807-1310ND
2018-04-059590-808-08282.10 ppb
2018-07-039590-801-1252ND
2018-07-039590-802-12392.30 ppb
2018-07-039590-803-1225ND
2018-07-039590-804-11562.60 ppb
2018-07-039590-805-1116ND
2018-07-039590-806-1023ND
2018-07-039590-807-10471.60 ppb
2018-07-039590-808-09502.50 ppb
2018-10-049590-801-10043.90 ppb
2018-10-049590-802-10153.50 ppb
2018-10-049590-803-10283.40 ppb
2018-10-049590-804-10462.70 ppb
2018-10-049590-805-11062.40 ppb
2018-10-049590-806-1153ND
2018-10-049590-807-11311.90 ppb
2018-10-049590-808-09283.00 ppb
2019-01-109590-801-09562.40 ppb
2019-01-109590-802-1017ND
2019-01-109590-803-10401.80 ppb
2019-01-109590-804-1101ND
2019-01-109590-805-1259ND
2019-01-109590-806-1343ND
2019-01-109590-808-08282.40 ppb
2019-01-159590-807-1350ND
2019-04-049590-801-08232.20 ppb
2019-04-049590-802-0837ND
2019-04-049590-803-09003.70 ppb
2019-04-049590-804-09303.90 ppb
2019-04-049590-805-0956ND
2019-04-049590-806-1110ND
2019-04-049590-807-1041ND
2019-04-049590-808-12412.90 ppb
2019-07-259590-801-10439.30 ppb
2019-07-259590-802-10592.80 ppb
2019-07-259590-803-1125ND
2019-07-259590-804-11472.60 ppb
2019-07-259590-805-13005.90 ppb
2019-07-259590-806-13578.30 ppb
2019-07-259590-807-13269.40 ppb
2019-07-259590-808-09327.70 ppb
2019-10-089590-801-11032.30 ppb
2019-10-089590-802-11201.80 ppb
2019-10-089590-803-11592.40 ppb
2019-10-089590-804-12202.40 ppb
2019-10-089590-805-1314ND
2019-10-089590-806-1441ND
2019-10-089590-807-14031.20 ppb
2019-10-089590-808-08513.90 ppb