Simazine

Londonderry Court Mobile Home Park

NOTE: Londonderry Court Mobile Home Park purchases water from Chester Water Authority which is required to test for simazine. Sample information shown below was taken by Chester Water Authority.

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	ND	2	ND
2015	ND	4	ND
2016	N/A	0	N/A
2017	ND	2	ND
2018	ND	1	ND
2019	N/A	0	N/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

NOTE: Londonderry Court Mobile Home Park purchases water from Chester Water Authority which is required to test for simazine. Sample information shown below was taken by Chester Water Authority.

Date	Lab ID	Result
2014-04-23	1414304	ND
2014-07-09	1425425	ND
2015-04-06	12630671	ND
2015-07-29	13010353	ND
2017-04-11	15934431	ND
2017-07-07	16410728	ND
2018-04-10	2308353001	ND