Simazine
CTWC - Unionville System
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 8 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 4 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 12 | 0 | ND |
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 |
---|---|---|
2014-01-21 | BG01716SOC5 | ND |
2014-01-21 | BG01717SOC5 | ND |
2014-01-21 | BG01713SOC5 | ND |
2014-01-22 | BG01714SOC5 | ND |
2014-01-22 | BG01715SOC5 | ND |
2014-01-22 | BG01718SOC5 | ND |
2014-01-22 | BG01719SOC5 | ND |
2014-02-14 | BG09385SOC5 | ND |
2015-03-03 | 3199324 | ND |
2015-06-03 | 3254573 | ND |
2015-07-13 | BJ46102SOC5 | ND |
2015-07-15 | BJ46999SOC5 | ND |
2017-08-29 | BY91937SOC5 | ND |
2017-08-29 | BY91939SOC5 | ND |
2017-08-29 | BY91938SOC5 | ND |
2017-11-21 | BZ45452SOC5 | ND |
2019-09-17 | SOC 200549386 | ND |
2019-09-17 | SOC 200549392 | ND |
2019-09-25 | SOC 200550426 | ND |
2019-09-25 | SOC 200550428 | ND |
2019-09-25 | SOC 200550427 | ND |
2019-10-02 | SOC 200551433 | ND |
2019-10-02 | SOC 200551434 | ND |
2019-10-09 | SOC 200552469 | ND |
2019-10-10 | SOC 200552468 | ND |
2019-10-10 | SOC 200552467 | ND |
2019-10-10 | SOC 200552466 | ND |
2019-10-10 | SOC 200552465 | ND |