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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Southern Okla Water Corp

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

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND400ND
2019ND200ND

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
2018-01-151801438ND
2018-01-151801437ND
2018-01-151801436ND
2018-01-151801435ND
2018-02-061802218ND
2018-02-061802217ND
2018-02-061802215ND
2018-02-131802465ND
2018-02-131802464ND
2018-02-271802749ND
2018-04-101804401ND
2018-04-101804400ND
2018-04-241804704ND
2018-04-241804703ND
2018-05-151805520ND
2018-05-151805519ND
2018-06-191806560ND
2018-06-191806559ND
2018-06-261806728ND
2018-06-261806727ND
2018-07-171807552ND
2018-07-171807551ND
2018-08-071808226ND
2018-08-071808225ND
2018-08-2118081130ND
2018-08-2118081129ND
2018-09-131809537ND
2018-09-131809540ND
2018-09-131809539ND
2018-09-131809538ND
2018-10-091810353ND
2018-10-091810352ND
2018-10-161810469ND
2018-10-161810468ND
2018-11-131811422ND
2018-11-131811421ND
2018-11-271811683ND
2018-11-271811684ND
2018-12-041812120ND
2018-12-041812119ND
2019-10-011910025ND
2019-10-011910024ND
2019-10-011910023ND
2019-10-011910022ND
2019-11-241911700ND
2019-11-241911697ND
2019-11-241911698ND
2019-11-241911699ND
2019-12-101912371ND
2019-12-101912370ND
2019-12-101912369ND
2019-12-101912368ND
2019-12-101912367ND
2019-12-101912366ND
2019-12-101912365ND
2019-12-101912364ND
2019-12-171912630ND
2019-12-171912633ND
2019-12-171912632ND
2019-12-171912631ND