Simazine

Woodstock

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	20	ND

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
2019-01-22	AK09877	ND
2019-01-22	AK09875	ND
2019-01-22	AK09873	ND
2019-01-22	AK09871	ND
2019-01-22	AK09869	ND
2019-04-08	AK14962	ND
2019-04-08	AK14970	ND
2019-04-08	AK14968	ND
2019-04-08	AK14966	ND
2019-04-08	AK14964	ND
2019-07-16	AK22599	ND
2019-07-16	AK22595	ND
2019-07-16	AK22593	ND
2019-07-16	AK22588	ND
2019-07-16	AK22581	ND
2019-10-07	AK34621	ND
2019-10-07	AK34629	ND
2019-10-07	AK34627	ND
2019-10-07	AK34625	ND
2019-10-07	AK34623	ND