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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Bayleaf Master

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.

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448

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND940ND
2015ND710ND
2016ND640ND
2017ND770ND
2018ND740ND
2019ND680ND

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
2014-01-07C316066-02ND
2014-01-09C316059-01ND
2014-01-09C316059-02ND
2014-01-09C316070-01ND
2014-01-09C316074-01ND
2014-01-09C316077-01ND
2014-01-09C400340-01ND
2014-01-13C316068-01ND
2014-01-13C316068-02ND
2014-01-16C316062-01ND
2014-01-20C316038-01ND
2014-01-20C316038-02ND
2014-01-23C316022-01ND
2014-01-23C316042-01ND
2014-01-23C316031-01ND
2014-01-27C316045-01ND
2014-02-04C316014-01ND
2014-02-24C316010-01ND
2014-04-01C402988-01ND
2014-04-01C403000-01ND
2014-04-02C402971-01ND
2014-04-02C402972-01ND
2014-04-02C402976-01ND
2014-04-02C402997-01ND
2014-04-03C404035-01ND
2014-04-07C403013-01ND
2014-04-07C403013-02ND
2014-04-08C402969-01RE2ND
2014-04-08C402969-02RE1ND
2014-04-09C403008-01RE1ND
2014-04-09C403008-02RE1ND
2014-04-09C403008-03RE2ND
2014-04-09C403011-01ND
2014-04-09C403011-02ND
2014-04-10C402991-01RE2ND
2014-04-10C402974-01RE1ND
2014-04-11C402973-01RE1ND
2014-04-11C402996-01RE2ND
2014-04-11C402996-02RE2ND
2014-04-11C402998-01RE2ND
2014-04-14C403010-01ND
2014-04-15C404042-01ND
2014-04-16C403015-01ND
2014-04-16C404794-01RE1ND
2014-04-17C402979-01ND
2014-04-22C404029-01ND
2014-04-23C403016-01ND
2014-04-24C403019-01ND
2014-04-24C402994-01ND
2014-04-24C402994-02ND
2014-04-28C402975-02ND
2014-04-28C402982-01ND
2014-04-28C403002-01ND
2014-05-07C402983-01ND
2014-05-08C404693-01ND
2014-05-19C405410-01ND
2014-06-25C408252-01RE1ND
2014-06-25C407473-01ND
2014-07-07C407794-01RE2ND
2014-07-09C407787-01ND
2014-07-10C407792-01ND
2014-07-16C407801-01RE1ND
2014-07-16C408014-01ND
2014-07-21C408795-01RE1ND
2014-07-22C407785-01ND
2014-07-22C407779-01RE1ND
2014-07-23C407773-01ND
2014-07-23C407773-02RE2ND
2014-07-23C407773-03ND
2014-07-23C407815-01ND
2014-07-23C409349-01ND
2014-07-29C407777-01ND
2014-07-30C407774-01RE1ND
2014-07-30C407775-01RE2ND
2014-07-30C407810-01RE2ND
2014-07-31C407783-03RE2ND
2014-07-31C407796-01RE1ND
2014-07-31C407798-01RE2ND
2014-08-04C409898-01RE2ND
2014-08-04C409898-02ND
2014-08-18C407776-01RE1ND
2014-08-25C410753-01RE2ND
2014-08-28C409121-01ND
2014-09-23C412353-01RE4ND
2014-10-02C411977-01ND
2014-10-07C411986-01ND
2014-10-07C411986-02ND
2014-10-07C411994-01ND
2014-10-13C411981-01ND
2014-10-15C411988-01ND
2014-10-20C413673-01ND
2014-10-21C411992-01RE1ND
2014-10-21C411997-01ND
2014-10-31C411991-01ND
2015-01-20ND
2015-01-21ND
2015-01-21ND
2015-01-21ND
2015-01-22ND
2015-01-22ND
2015-01-23ND
2015-01-26ND
2015-01-27ND
2015-01-28ND
2015-01-28ND
2015-01-28ND
2015-01-28ND
2015-01-28ND
2015-01-29ND
2015-01-29ND
2015-01-30ND
2015-01-30ND
2015-02-03ND
2015-04-10ND
2015-04-16ND
2015-04-20ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-23ND
2015-04-23ND
2015-04-23ND
2015-04-24ND
2015-04-24ND
2015-04-28ND
2015-04-28ND
2015-04-29ND
2015-04-29ND
2015-04-29ND
2015-04-29ND
2015-04-29ND
2015-04-30ND
2015-04-30ND
2015-05-06ND
2015-05-06ND
2015-05-06ND
2015-05-06ND
2015-05-06ND
2015-05-06ND
2015-05-07ND
2015-05-13ND
2015-05-13ND
2015-07-10ND
2015-07-15ND
2015-07-15ND
2015-07-21ND
2015-07-21ND
2015-07-22ND
2015-07-22ND
2015-07-22ND
2015-07-23ND
2015-07-29ND
2015-07-29ND
2015-07-30ND
2015-07-30ND
2015-07-31ND
2015-07-31ND
2015-08-05ND
2015-08-05ND
2015-08-07ND
2015-08-10ND
2015-10-09ND
2015-10-21ND
2015-11-04ND
2016-01-05C515812-01ND
2016-01-05C515839-01RE1ND
2016-01-07C515785-01ND
2016-01-07C515788-01ND
2016-01-12C515799-01ND
2016-01-13C515798-02RE1ND
2016-01-18C515792-01RE1ND
2016-01-18C515808-01ND
2016-01-27C515838-01ND
2016-02-09CZ01814-01ND
2016-02-10C515826-01ND
2016-02-17C515800-01ND
2016-02-18CZ02145-01RE2ND
2016-02-22C515781-01ND
2016-02-25CZ02371-01ND
2016-03-17C515833-01ND
2016-03-17C515833-02ND
2016-03-23CZ02855-01ND
2016-04-14CZ03127-01ND
2016-04-18CZ03146-01ND
2016-04-18CZ03146-02ND
2016-04-18CZ03170-01ND
2016-04-19CZ03132-01ND
2016-04-19CZ03136-01ND
2016-04-19CZ03149-01ND
2016-04-20CZ03154-01ND
2016-04-21CZ03167-01ND
2016-04-21CZ03116-01ND
2016-04-22CZ03118-01RE3ND
2016-04-26CZ03122-01ND
2016-04-26CZ03157-01ND
2016-04-28CZ03139-01ND
2016-04-28CZ03164-01ND
2016-04-28CZ03164-02ND
2016-05-03CZ03151-01ND
2016-05-03CZ06064-01ND
2016-05-03CZ03150-01RE2ND
2016-05-04CZ03134-01RE1ND
2016-05-04CZ03152-01ND
2016-05-17CZ03120-01ND
2016-05-17CZ07299-01RE1ND
2016-05-19CZ03142-01ND
2016-05-19CZ03142-02ND
2016-05-24CZ03126-01ND
2016-05-27CZ03113-01ND
2016-06-09CZ03162-01ND
2016-06-14CZ09074-01ND
2016-07-05CZ08305-01ND
2016-07-07CZ08293-01ND
2016-07-08CZ08299-01ND
2016-07-11CZ08312-01ND
2016-07-18CZ08295-01ND
2016-07-28CZ08294-01ND
2016-07-28CZ08308-01ND
2016-07-28CZ08309-01ND
2016-07-28CZ08310-01ND
2016-08-04CZ08302-01ND
2016-08-09CZ08313-01ND
2016-08-16CZ08300-01ND
2016-08-17CZ12208-01ND
2016-08-30CZ13065-01ND
2016-09-19CZ08291-01ND
2016-10-12CZ13732-01ND
2016-11-17CZ13727-01ND
2017-01-16CZ18677-01ND
2017-01-16CZ18677-02ND
2017-01-17CZ18655-01ND
2017-01-17CZ18681-01RE1ND
2017-01-18CZ18651-01ND
2017-01-18CZ18684-01ND
2017-01-19CZ18712-01ND
2017-01-19CZ18715-01RE1ND
2017-01-20CZ18696-01ND
2017-01-20CZ18704-02ND
2017-01-25CZ18708-01ND
2017-01-25CA01150-01ND
2017-01-30CA01345-01ND
2017-02-01CA01491-01ND
2017-02-01CZ18670-01RE1ND
2017-02-01CZ18700-01RE2ND
2017-02-03CZ18706-02RE2ND
2017-02-03CZ18662-01RE1ND
2017-02-17CA02512-01ND
2017-04-17CA02814-02ND
2017-04-17CA02834-01ND
2017-04-18CA02803-01ND
2017-04-18CA02803-03RE1ND
2017-04-18CA02826-01RE1ND
2017-04-18CA02826-02ND
2017-04-19CA02810-01ND
2017-04-19CA02805-01RE3ND
2017-04-19CA02829-01ND
2017-04-19CA02852-01ND
2017-04-19CA02853-01ND
2017-04-19CA02855-01ND
2017-04-20CA02806-01ND
2017-04-20CA02808-01ND
2017-04-24CA02828-01ND
2017-04-24CA02828-02ND
2017-04-24CA02830-01ND
2017-04-24CA02807-01RE1ND
2017-04-24CA02809-01ND
2017-04-24CA02809-02ND
2017-04-24CA02815-01ND
2017-05-01CA06485-01RE1ND
2017-05-03CA02857-01ND
2017-05-04CA02842-03ND
2017-05-08CA02824-01ND
2017-05-10CA02851-01ND
2017-05-11CA02845-01ND
2017-05-11CA07290-01ND
2017-05-18CA02846-01RE1ND
2017-05-18CA02846-02ND
2017-05-23CA02832-01ND
2017-05-24CA08392-01RE1ND
2017-05-25CA02849-02RE2ND
2017-05-25CA08414-01RE2ND
2017-05-31CA08567-01RE1ND
2017-06-05CA02821-01ND
2017-06-07CA02812-01ND
2017-06-09CA09033-01ND
2017-07-10CA07669-01RE1ND
2017-07-12CA07661-01ND
2017-07-12CA07659-01ND
2017-07-12CA07659-03RE1ND
2017-07-12CA07664-01RE1ND
2017-07-12CA07688-01RE1ND
2017-07-13CA07662-01ND
2017-07-19CA07671-01ND
2017-07-19CA07675-01ND
2017-07-19CA07675-02ND
2017-07-20CA07880-01ND
2017-07-21CA07677-01ND
2017-07-21CA07667-01ND
2017-07-21CA07663-01RE1ND
2017-07-24CA07678-01RE2ND
2017-07-26CA11475-01ND
2017-09-06CA07680-01ND
2017-09-13CA14347-01ND
2017-09-22CA14697-01RE1ND
2017-11-29CA14915-01RE1ND
2018-01-22CA18131-01 ND
2018-01-23CA18180-01 ND
2018-01-24CA18103-01 ND
2018-01-24CA18117-01 ND
2018-01-24CA18138-01 ND
2018-01-24CA18182-01RE1 ND
2018-01-25CA18186-01 ND
2018-01-26CA18203-01 ND
2018-01-31CA18167-01 ND
2018-02-01CA18190-01 ND
2018-02-01CA18190-02RE1 ND
2018-02-01CA18195-01RE1 ND
2018-02-01CA18195-03 ND
2018-02-02CA18129-01 ND
2018-02-08CA18122-01 ND
2018-02-08CA18127-01 ND
2018-02-08CA18202-01 ND
2018-03-27CB04380-01RE2 ND
2018-04-05CB03226-01 ND
2018-04-05CB03226-02 ND
2018-04-05CB03226-03 ND
2018-04-13CB03220-01RE1 ND
2018-04-17CB03242-01RE1 ND
2018-04-17CB03263-01 ND
2018-04-18CB03239-01 ND
2018-04-18CB03245-01RE1 ND
2018-04-18CB03260-01RE1 ND
2018-04-18CB03260-03RE1 ND
2018-04-19CB03233-01 ND
2018-04-19CB03246-01 ND
2018-04-19CB03254-01 ND
2018-04-19CB03256-05RE1 ND
2018-04-19CB03256-06 ND
2018-04-25CB03227-01 ND
2018-04-25CB03250-01 ND
2018-04-25CB03253-01 ND
2018-04-25CB06129-01 ND
2018-04-25CB06129-02 ND
2018-04-27CB03234-01 ND
2018-04-27CB03257-01 ND
2018-04-27CB03257-02 ND
2018-04-27CB03269-01 ND
2018-05-02CB06580-01RE1 ND
2018-05-03CB06594-01RE2 ND
2018-05-10CB07099-01 ND
2018-05-10CB07099-02 ND
2018-05-10CB07099-03RE1 ND
2018-05-21CB07571-01 ND
2018-05-21CB07571-02 ND
2018-05-24CB07822-01 ND
2018-05-24CB07822-02 ND
2018-06-21CB03270-01 ND
2018-07-19CB08093-01 ND
2018-07-19CB08098-01 ND
2018-07-24CB08082-01 ND
2018-07-25CB08089-01 ND
2018-07-26CB08105-01 ND
2018-07-26CB08105-03 ND
2018-08-02CB08100-01 ND
2018-08-02CB08100-02RE2 ND
2018-08-02CB08100-03 ND
2018-08-02CB08100-04 ND
2018-08-02CB08100-05 ND
2018-08-02CB08100-06 ND
2018-08-02CB11707-01RE2 ND
2018-08-03CB11829-01RE1 ND
2018-08-03CB11829-02RE1 ND
2018-08-03CB11829-03RE1 ND
2018-08-09CB08084-01 ND
2018-08-09CB08084-02 ND
2018-08-09CB08084-03RE2 ND
2018-09-25CB14505-01 ND
2018-10-25CB14501-01 ND
2018-10-26CB16357-01RE2 ND
2019-01-11CB18625-01 ND
2019-01-18CB18614-01 ND
2019-01-18CB18618-01 ND
2019-01-23CB18667-01RE3 ND
2019-01-24CB18673-01 ND
2019-01-29CC01414-01 ND
2019-02-06CB18677-01RE1 ND
2019-02-08CB18631-01 ND
2019-02-08CB18632-01RE1 ND
2019-02-08CB18632-02RE1 ND
2019-02-08CB18659-01 ND
2019-02-15CB18644-01 ND
2019-02-21CB18621-01 ND
2019-02-21CB18621-02_A ND
2019-02-21CB18621-03RE1 ND
2019-02-22CB18630-01 ND
2019-02-22CB18630-02 ND
2019-03-12CB18640-01 ND
2019-03-12CB18674-01 ND
2019-04-12CC03992-01 ND
2019-04-15CC04002-01 ND
2019-04-15CC04011-01 ND
2019-04-15CC04040-01 ND
2019-04-17CC03996-01 ND
2019-04-17CC04016-01 ND
2019-04-18CC03999-01RE1 ND
2019-04-18CC04004-01RE1 ND
2019-04-18CC04057-01RE1 ND
2019-04-24CC04037-01 ND
2019-04-24CC04054-01 ND
2019-04-24CC04054-02 ND
2019-04-25CC04031-01 ND
2019-04-25CC06331-01 ND
2019-04-26CC04019-01RE1 ND
2019-04-26CC04019-02 ND
2019-04-26CC04027-01 ND
2019-04-26CC04027-02 ND
2019-05-01CC04009-02 ND
2019-05-02CC04021-01 ND
2019-05-03CC04024-01RE2 ND
2019-05-03CC04024-02 ND
2019-05-03CC04024-03 ND
2019-05-03CC04035-01 ND
2019-05-03CC04043-01 ND
2019-05-03CC04050-01 ND
2019-05-14CC04060-01 ND
2019-05-14CC07576-01RE1 ND
2019-05-15CC04063-01 ND
2019-06-13CC04038-01 ND
2019-06-28CC04036-01 ND
2019-07-24CC10474-01 ND
2019-07-25CC10488-01 ND
2019-07-26CC10509-01 ND
2019-08-02CC10496-01 ND
2019-08-15CC10479-01 ND
2019-08-15CC10485-01 ND
2019-08-15CC10485-02 ND
2019-08-15CC10485-03 ND
2019-08-15CC10497-01 ND
2019-08-28CC10491-01 ND
2019-08-28CC10493-01RE2 ND
2019-08-28CC10494-01 ND
2019-09-10CC10476-01 ND
2019-09-10CC10477-01RE1 ND
2019-09-10CC10483-01 ND
2019-10-22CC15781-01RE1 ND
2019-11-07CC15767-01 ND
2019-11-19CC15773-01 ND