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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Baltimore

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.

 

55

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND110ND
2013ND130ND
20140.350 ppb41ND - 1.40 ppb
20150.0154 ppb131ND - 0.200 ppb
2016ND60ND
2017ND80ND

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
2012-04-300300002_01_BC043ND
2012-04-300300002_02_BC043ND
2012-06-270300002_01_BC062ND
2012-06-270300002_02_BC062ND
2012-07-090300002_02_07091ND
2012-07-090300002_01_07091ND
2012-07-100300002_01_00008ND
2012-07-100300002_02_00008ND
2012-09-140300002_01_09141ND
2012-09-140300002_02_09141ND
2012-09-260300002_01_99884ND
2013-02-280300002_01_00419ND
2013-02-280300002_02_00419ND
2013-06-050300002_01_BC060ND
2013-06-050300002_02_BC060ND
2013-06-280300002_02_BC062ND
2013-06-280300002_02_03535ND
2013-06-280300002_01_BC062ND
2013-06-280300002_01_03535ND
2013-09-230300002_01_TREATND
2013-09-230300002_02_04973ND
2013-09-230300002_02_COB09ND
2013-09-230300002_01_04973ND
2013-09-230300002_01_CB092ND
2014-01-290300002_01_00348ND
2014-01-290300002_02_00348ND
2014-06-300300002_02_PLTS11.40 ppb
2014-07-300300002_01_TREATND
2015-03-182060750003ND
2015-03-182060750002ND
2015-06-032075366003ND
2015-06-032075366001ND
2015-06-032075366002ND
2015-06-22E15004053003ND
2015-06-22E15004053001ND
2015-09-102095329003ND
2015-09-102095329002ND
2015-09-102095329001ND
2015-12-10ASH_T0.200 ppb
2015-12-10PLTS_1ND
2015-12-10PLT_2ND
2016-05-23E16004413004ND
2016-05-23E16004413006ND
2016-05-23E16004413002ND
2016-09-21TREATED_A_1ND
2016-09-21PLT_1ND
2016-09-21PLT_2ND
2017-04-20TREATED_A_AND
2017-04-20TREATED_T1_AND
2017-04-20TREATED_T4_1ND
2017-06-08TREATED_A_CND
2017-06-08PLANT_2ND
2017-06-12PLANT_1ND
2017-06-20E17005034001ND
2017-06-20E17005035001ND