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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Walnut Creek Village

NOTE: Walnut Creek Village purchases water from Wayne Water Districts which is required to test for simazine. Sample information shown below was taken by Wayne Water Districts.

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

 

145

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND100ND
2016ND60ND
2017ND470ND
2018ND300ND
2019ND150ND

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: Walnut Creek Village purchases water from Wayne Water Districts which is required to test for simazine. Sample information shown below was taken by Wayne Water Districts.

Date Lab ID Result
2014-02-058480-020514-ET2SND
2014-03-058480-030514-E03SND
2014-03-058480-030514-E04SND
2014-03-058480-030514-E05SND
2014-03-058480-030514-E08SND
2014-03-058480-030514-ET3SND
2014-05-148480-051414-E14SND
2014-05-148480-051414-E15SND
2014-05-148480-051414-E30SND
2014-05-148480-051414-E37SND
2014-05-148480-051414-ET2SND
2014-06-188480-061814-E01SND
2014-06-188480-061814-E03SND
2014-06-188480-061814-E06SND
2014-06-188480-061814-E27SND
2014-06-188480-061814-ET3SND
2014-06-238480-062314-E04SND
2014-06-238480-062314-E05SND
2014-06-238480-062314-E07SND
2014-06-238480-062314-E08SND
2014-06-238480-062314-E09SND
2014-06-258480-062514-E02SND
2014-06-258480-062514-E11SND
2014-07-238480-072314-E30SND
2014-07-238480-072314-E37SND
2014-09-108480-091014-E06SND
2014-09-108480-091014-E27SND
2014-09-168480-091614-E01SND
2014-09-168480-091614-E07SND
2014-09-168480-091614-E09SND
2014-09-168480-091614-E10SND
2014-09-258480-092514-E02SND
2014-09-258480-092514-E11SND
2014-09-258480-092514-E14SND
2014-09-258480-092514-E15SND
2014-10-298480-102914-E10SND
2014-10-298480-102914-E1ASND
2015-02-11ND
2015-02-11ND
2015-02-11ND
2015-02-11ND
2015-04-29ND
2015-04-29ND
2015-04-29ND
2015-04-29ND
2015-07-08ND
2015-10-21ND
2016-02-178480-021716-E1ASND
2016-04-068480-040616-E36SND
2016-04-068480-040616-E38SND
2016-04-208480-042016-E1ASND
2016-09-148480-091416-E36SND
2016-09-148480-091416-E38SND
2017-03-028480-030217-E03SND
2017-03-028480-030217-E04SND
2017-03-028480-030217-E05SND
2017-03-028480-030217-E08SND
2017-03-028480-030217-ET2SND
2017-03-028480-030217-ET3SND
2017-05-018480-050117-E30SND
2017-06-078480-060717-E15SND
2017-06-078480-060717-E01SND
2017-06-078480-060717-E02SND
2017-06-078480-060717-E03SND
2017-06-078480-060717-E04SND
2017-06-078480-060717-E05SND
2017-06-078480-060717-E06SND
2017-06-078480-060717-E07SND
2017-06-078480-060717-E08SND
2017-06-078480-060717-E09SND
2017-06-078480-060717-E11SND
2017-06-078480-060717-E14SND
2017-06-078480-060717-E27SND
2017-06-078480-060717-E37SND
2017-06-078480-060717-ET2SND
2017-06-078480-060717-ET3SND
2017-08-168480-081617-E01SND
2017-08-168480-081617-E02SND
2017-08-168480-081617-E09SND
2017-08-168480-081617-E10SND
2017-08-168480-081617-E11SND
2017-08-168480-081617-E14SND
2017-08-168480-081617-E30SND
2017-08-168480-081617-E37SND
2017-09-208480-092017-E06SND
2017-09-208480-092017-E07SND
2017-09-208480-092017-E27SND
2017-09-208480-092017-E67SND
2017-09-208480-092017-E68SND
2017-09-208480-092017-E71SND
2017-09-278480-092717-ET1SND
2017-09-278480-092717-ET2SND
2017-11-158480-111517-E15SND
2017-11-158480-111517-E67SND
2017-11-158480-111517-E68SND
2017-11-158480-111517-E71SND
2017-11-158480-111517-ET1SND
2017-11-158480-111517-ET2SND
2017-11-158480-111517-E10SND
2017-12-208480-122017-E30SND
2018-01-248480-012418-E67SND
2018-01-248480-012418-E68SND
2018-01-248480-012418-E71SND
2018-01-248480-012418-ET1SND
2018-01-298480-012918-E40SND
2018-01-298480-012918-E41SND
2018-02-288480-022818-E30SND
2018-02-288480-022818-ET2SND
2018-04-048480-040418-E40SND
2018-04-048480-040418-E41SND
2018-04-048480-040418-E67SND
2018-04-048480-040418-E68SND
2018-04-048480-040418-E71SND
2018-04-118480-041118-ET1SND
2018-05-228480-052218-E30SND
2018-05-308480-053018-ET2SND
2018-07-248480-072418-E67SND
2018-07-248480-072418-E68SND
2018-07-248480-072418-E71SND
2018-09-208480-092018-E30SND
2018-09-208480-092018-ET2SND
2018-09-268480-092618-E1ASND
2018-09-268480-092618-ET1SND
2018-10-248480-102418-E1ASND
2018-10-248480-102418-E67SND
2018-10-248480-102418-E68SND
2018-10-248480-102418-E71SND
2018-11-148480-111418-E30SND
2018-11-148480-111418-ET1SND
2018-11-148480-111418-ET2SND
2019-02-188480-021819-E1ASND
2019-02-188480-021819-E30SND
2019-02-188480-021819-E67SND
2019-02-188480-021819-E68SND
2019-02-188480-021819-E71SND
2019-02-188480-021819-ET1SND
2019-02-188480-021819-ET2SND
2019-03-198480-031919-E36SND
2019-03-198480-031919-E38SND
2019-06-268480-062619-E1ASND
2019-06-268480-062619-E36SND
2019-06-268480-062619-E38SND
2019-09-178480-091719-E38SND
2019-09-208480-092019-E38SND
2019-11-068480-110619-E38SND