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EWG's Tap Water Database — 2021 UPDATE

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Simazine

North Kona

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

 

77

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND180ND
2015ND20ND
2016ND180ND
2017ND120ND
2018ND200ND
2019ND70ND

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
2014-03-18C14-03-0131AND
2014-03-18C14-03-0132ND
2014-03-18C14-03-0133ND
2014-03-18C14-03-0134ND
2014-03-18C14-03-0135ND
2014-03-18C14-03-0136ND
2014-03-18C14-03-0137ND
2014-03-18C14-03-0138AND
2014-03-18C14-03-0130ND
2014-04-15C14-04-0208ND
2014-04-15C14-04-0212ND
2014-04-15C14-04-0211ND
2014-04-15C14-04-0207ND
2014-04-15C14-04-0206ND
2014-04-15C14-04-0205ND
2014-04-15C14-04-0204ND
2014-04-15C14-04-0203ND
2014-07-07C14-07-0098ND
2015-08-19201508150137ND
2015-11-18201508150170ND
2016-03-15ND
2016-03-15ND
2016-03-15ND
2016-03-21ND
2016-03-21ND
2016-03-21ND
2016-03-21ND
2016-03-21ND
2016-03-21ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-05-25ND
2016-05-25ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2018-01-17C18-01-0066AND
2018-01-17C18-01-0065ND
2018-05-22201805170773ND
2018-05-22201805170778ND
2018-05-23201805170774ND
2018-05-23201805290225ND
2018-05-23201805290227ND
2018-05-23201805290216ND
2018-06-18C18-06-0122ND
2018-07-08201805230559ND
2018-09-24C18-09-0284ND
2018-09-24C18-09-0285ND
2018-10-15201810170192ND
2018-10-22201810240383ND
2018-10-22201810240336ND
2018-10-29201810310535ND
2018-10-29201810310409ND
2018-10-29201810310336ND
2018-10-29201810310350ND
2018-12-03C18-12-0014ND
2019-01-07201901090296ND
2019-01-07201901090308ND
2019-04-29201905010517ND
2019-07-15201907170652ND
2019-07-15201907170514ND
2019-09-09201909100461ND
2019-10-09C19-10-0029AND