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EWG's Tap Water Database — 2021 UPDATE

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Simazine

Great Oaks Water Company Inc.

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

 

71

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015N/A00N/A
2016ND260ND
2017ND80ND
2018N/A00N/A
2019ND300ND

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
2014-03-279590-013-1030ND
2014-05-159590-022-1450ND
2014-05-159590-021-1525ND
2014-05-159590-013-1115ND
2014-08-259590-022-1505ND
2014-08-259590-021-1545ND
2014-08-279590-013-1230ND
2016-05-249590-001-1055ND
2016-05-249590-002-1140ND
2016-05-249590-013-0915ND
2016-05-249590-008-1005ND
2016-05-259590-011-1015ND
2016-05-259590-009-0945ND
2016-05-259590-018-1140ND
2016-05-259590-015-1055ND
2016-05-259590-019-1300ND
2016-05-259590-025-1415ND
2016-05-259590-004-0850ND
2016-05-269590-023-1350ND
2016-08-229590-004-1230ND
2016-08-229590-009-1410ND
2016-08-229590-011-1325ND
2016-08-249590-018-1315ND
2016-08-249590-015-1450ND
2016-08-249590-023-1405ND
2016-08-249590-013-1230ND
2016-08-259590-019-1350ND
2016-08-259590-001-1205ND
2016-08-259590-002-1435ND
2016-08-259590-008-1255ND
2016-09-069590-007-1400ND
2016-09-289590-025-1400ND
2016-11-029590-025-1115ND
2017-03-089590-025-0930ND
2017-04-139590-006-1000ND
2017-04-139590-021-1120ND
2017-04-139590-022-1050ND
2017-08-309590-021-1510ND
2017-08-319590-022-1515ND
2017-08-319590-025-1440ND
2017-10-029590-010-1530ND
2019-05-219590-006-1100ND
2019-05-219590-001-1500ND
2019-05-219590-002-0915ND
2019-05-219590-007-1000ND
2019-05-219590-008-1415ND
2019-05-229590-010-1045ND
2019-05-229590-015-1310ND
2019-05-229590-009-1350ND
2019-05-229590-013-1510ND
2019-06-279590-018-1030ND
2019-06-279590-011-1000ND
2019-06-279590-004-0930ND
2019-06-279590-025-1100ND
2019-06-279590-023-1120ND
2019-08-209590-019-1000ND
2019-08-289590-006-0920ND
2019-08-289590-007-1120ND
2019-08-289590-002-1030ND
2019-08-289590-001-1420ND
2019-08-299590-008-1410ND
2019-08-299590-015-0850ND
2019-08-299590-009-0745ND
2019-08-299590-004-1310ND
2019-08-299590-018-1000ND
2019-09-059590-023-1400ND
2019-09-059590-025-1250ND
2019-09-059590-019-1145ND
2019-09-129590-013-1430ND
2019-09-129590-011-1300ND
2019-09-129590-010-1145ND