Know Your Environment. Protect Your Health.

Simazine

Arizona Water Company - Sierra Vista

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND140ND
2019N/A00N/A
2020N/A00N/A
20210.0350 ppb162ND - 0.460 ppb
2022N/A00N/A
2023N/A00N/A

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
2018-01-23201801240115SBND
2018-01-23201801240115SCND
2018-01-23201801240115SDND
2018-01-23201801240130SAND
2018-01-23201801240130SBND
2018-01-23201801240130SCND
2018-01-23201801240115SAND
2018-07-25201807250658SCND
2018-07-25201807250662SCND
2018-07-25201807250662SBND
2018-07-25201807250662SAND
2018-07-25201807250658SDND
2018-07-25201807250658SBND
2018-07-25201807250658SAND
2021-05-2021E2311-02 SOCND
2021-05-2021E2311-07SOCND
2021-05-2021E2311-06SOCND
2021-05-2021E2311-05SOCND
2021-05-2021E2311-04 SOCND
2021-05-2021E2311-03 SOCND
2021-05-2021E2311-01 SOCND
2021-11-1621K2237-010.460 ppb
2021-11-1621K2237-02ND
2021-11-1621K2237-030.1000 ppb
2021-11-1721K2431-01ND
2021-11-1721K2431-02ND
2021-11-1721K2431-03ND
2021-11-1721K2431-04ND
2021-12-0821L1169-01ND
2021-12-2221L2776-01ND