Simazine
CTWC - Shoreline Region-Guilford 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 |
---|---|---|---|---|
2014 | ND | 5 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 11 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 1 | 0 | ND |
2019 | ND | 15 | 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 |
---|---|---|
2014-06-12 | 140612CWCSOC5 | ND |
2014-09-16 | 141015-0009SOC5 | ND |
2014-09-16 | 3104515 | ND |
2014-11-03 | 3132508 | ND |
2014-12-11 | 3153932 | ND |
2015-06-03 | BJ25400SOC5 | ND |
2015-07-27 | BJ63961SOC5 | ND |
2015-10-19 | BK10283SOC5 | ND |
2016-01-21 | BK55954SOC5 | ND |
2016-01-21 | BK55943SOC5 | ND |
2016-01-21 | BK55941SOC5 | ND |
2016-01-25 | BK57134SOC5 | ND |
2016-03-14 | BK78127SOC5 | ND |
2016-05-04 | BN25256SOC5 | ND |
2016-06-01 | BN44892SOC5 | ND |
2016-06-01 | BN44876SOC5 | ND |
2016-07-12 | BN71477SOC5 | ND |
2016-07-19 | BN75784SOC5 | ND |
2016-07-19 | BN75782SOC5 | ND |
2018-07-09 | CA86688 | ND |
2019-01-30 | SOC 200520057 | ND |
2019-06-06 | SOC 200535308 | ND |
2019-06-06 | SOC 200535309 | ND |
2019-06-11 | SOC 200536055 | ND |
2019-06-11 | SOC 200536054 | ND |
2019-06-19 | SOC 200542695 | ND |
2019-06-24 | SOC 200537520 | ND |
2019-07-29 | SOC 200542348 | ND |
2019-07-30 | SOC 200542453 | ND |
2019-07-31 | SOC 200542480 | ND |
2019-07-31 | SOC 200542466 | ND |
2019-07-31 | SOC 200542497 | ND |
2019-07-31 | SOC 200542499 | ND |
2019-07-31 | SOC 200542468 | ND |
2019-08-14 | SOC 200544869 | ND |