Know Your Environment. Protect Your Health.

Simazine

China Lake Naval Air Weapons Station

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND40ND
2021ND10ND
2022ND30ND
2023ND80ND

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
2020-11-30CA1510703_002_002-202011301301ND
2020-11-30CA1510703_004_004-202011301420ND
2020-11-30CA1510703_013_013-202011301346ND
2020-11-30CA1510703_017_017-202011301450ND
2021-06-15CA1510703_015_015-202106150945ND
2022-06-28CA1510703_043_043-202206280900ND
2022-09-05CA1510703_043_043-202209050939ND
2022-11-08CA1510703_043_043-202211080845ND
2023-01-24CA1510703_043_043-202301240755ND
2023-04-11CA1510703_043_043-202304110856ND
2023-11-07CA1510703_017_017-202311070732ND
2023-11-07CA1510703_004_004-202311070717ND
2023-11-07CA1510703_015_015-202311070807ND
2023-11-07CA1510703_002_002-202311070901ND
2023-11-07CA1510703_013_013-202311070824ND
2023-11-07CA1510703_043_043-202311070917ND