Know Your Environment. Protect Your Health.

Simazine

Piedmont Triad Regional

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0200 ppb41ND - 0.0800 ppb
20190.0550 ppb21ND - 0.110 ppb
20200.143 ppb32ND - 0.260 ppb
20210.220 ppb110.220 ppb
2022ND10ND
2023ND20ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-223856550ND
2018-04-1039092090.0800 ppb
2018-07-243999735ND
2018-10-164091516ND
2019-04-1642622840.110 ppb
2019-07-104349406ND
2020-03-1745898770.260 ppb
2020-04-2146126940.170 ppb
2020-12-164799311ND
2021-03-1648558890.220 ppb
2022-12-06810-46775-A-1-AND
2023-10-26810-83028-I-1-AND
2023-11-13810-84942-A-1-AND
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