Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Simazine

City of Orange

Simazine is a hormone-disrupting herbicide related to atrazine. It affects the male and female reproductive systems. In studies of laboratory animals, simazine increases blood levels of estrogen, decreases prolactin and progesterone, and causes mammary and ovarian tumors.

MORE ABOUT THIS CONTAMINANT

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND50ND
2015ND20ND
2016ND230ND
2017ND100ND
2018ND170ND
2019ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for simazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

EPA Maximum Contaminant
Level (MCL) 4 ppb

The legal limit for simazine, established in 1992, was based on toxicity studies in laboratory animals conducted in the 1980s. This limit does not fully protect against harm to the reproductive system, harm to the developing fetus, and hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-134417-023-0930ND
2014-05-144417-034-0930ND
2014-05-144417-008-1335ND
2014-08-274417-034-0830ND
2014-08-274417-008-1050ND
2015-03-254417-017-1110ND
2015-04-284417-017-1000ND
2016-01-194417-021-0945ND
2016-01-194417-016-0910ND
2016-01-264417-034-1010ND
2016-01-264417-018-1030ND
2016-01-264417-019-1220ND
2016-01-264417-020-1115ND
2016-01-264417-023-1055ND
2016-01-264417-009-0925ND
2016-01-264417-003-0950ND
2016-04-144417-003-1150ND
2016-04-144417-015-1110ND
2016-04-254417-009-1245ND
2016-04-254417-018-1020ND
2016-04-254417-023-1115ND
2016-04-254417-019-1225ND
2016-04-254417-016-1045ND
2016-04-254417-021-1150ND
2016-07-274417-049-0850ND
2016-07-274417-015-1015ND
2016-09-134417-020-1035ND
2016-10-064417-049-1030ND
2016-10-184417-020-0920ND
2016-12-134417-022-1015ND
2017-01-114417-049-0920ND
2017-01-114417-022-1020ND
2017-01-164417-008-1050ND
2017-04-054417-049-0950ND
2017-04-254417-008-0920ND
2017-04-254417-022-1000ND
2017-05-184417-022-0950ND
2017-05-184417-034-0820ND
2017-05-234417-008-1005ND
2017-08-234417-034-0830ND
2018-03-064417-017-1115ND
2018-03-064417-009-1220ND
2018-03-064417-049-0935ND
2018-03-064417-018-0840ND
2018-03-064417-023-0950ND
2018-03-064417-016-0915ND
2018-03-064417-019-1135ND
2018-03-064417-020-1015ND
2018-03-064417-021-1055ND
2018-05-094417-023-1035ND
2018-05-094417-009-1310ND
2018-05-094417-018-0940ND
2018-05-094417-016-1005ND
2018-05-094417-019-1255ND
2018-05-094417-049-1050ND
2018-05-094417-017-1230ND
2018-05-094417-020-1120ND
2019-04-224417-021-1010ND
2019-09-054417-021-1210ND