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EWG's Tap Water Database — 2019 UPDATE

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Simazine

Florin County Water District

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.

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND60ND
2014ND80ND
2015ND170ND
2016N/A00N/A
2017N/A00N/A

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
2012-05-305810-009-0956ND
2012-08-295810-003-0937ND
2013-04-155810-012-1325ND
2013-12-125810-004-1155ND
2013-12-125810-002-1114ND
2013-12-125810-006-1427ND
2013-12-125810-007-0950ND
2013-12-125810-010-1304ND
2014-04-305810-009-1200ND
2014-04-305810-003-0927ND
2014-04-305810-007-0841ND
2014-04-305810-002-1017ND
2014-04-305810-006-1241ND
2014-04-305810-004-1054ND
2014-08-075810-010-1305ND
2014-08-075810-012-1010ND
2015-02-115810-010-1305ND
2015-02-115810-006-1402ND
2015-02-115810-009-1216ND
2015-02-115810-004-1115ND
2015-02-115810-007-0906ND
2015-02-115810-012-0948ND
2015-05-275810-003-1012ND
2015-05-275810-012-0923ND
2015-05-275810-009-1159ND
2015-05-275810-004-1053ND
2015-05-275810-006-1258ND
2015-09-235810-003-1044ND
2015-09-235810-004-1147ND
2015-09-235810-006-1336ND
2015-09-235810-007-0932ND
2015-09-235810-009-1247ND
2015-09-235810-012-1009ND