Know Your Environment. Protect Your Health.

Simazine

Tesoro Viejo Master Mwc, Inc.

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND40ND
2020ND60ND
2021ND40ND
2022ND40ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-08-31CA2010017_002_002-201808310845ND
2018-12-06CA2010017_006_006-201812061037ND
2018-12-12CA2010017_001_001-201812121105ND
2019-03-20CA2010017_001_001-201903200815ND
2019-06-12CA2010017_006_006-201906121015ND
2019-08-21CA2010017_002_002-201908210955ND
2019-11-13CA2010017_006_006-201911131010ND
2020-02-05CA2010017_006_006-202002051000ND
2020-05-13CA2010017_006_006-202005131000ND
2020-06-03CA2010017_002_002-202006031215ND
2020-06-09CA2010017_001_001-202006090845ND
2020-09-02CA2010017_001_001-202009020840ND
2020-12-09CA2010017_001_001-202012090945ND
2021-03-16CA2010017_001_001-202103161000ND
2021-06-28CA2010017_002_002-202106280955ND
2021-09-15CA2010017_001_001-202109151045ND
2021-12-15CA2010017_001_001-202112151110ND
2022-06-08CA2010017_001_001-202206080930ND
2022-07-06CA2010017_002_002-202207060900ND
2022-09-13CA2010017_001_001-202209131030ND
2022-12-05CA2010017_001_001-202212051045ND
2023-02-14CA2010017_006_006-202302141040ND