Know Your Environment. Protect Your Health.

Simazine

Evansville

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
20190.398 ppb43ND - 0.690 ppb
20200.140 ppb41ND - 0.560 ppb
20210.175 ppb41ND - 0.700 ppb
20220.130 ppb41ND - 0.520 ppb
20230.205 ppb42ND - 0.430 ppb

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
2018-01-2418A0502-01_01ND
2018-09-1818I0698-01_01ND
2018-10-3018J1016-01_01ND
2019-01-2219A0462-01_010.380 ppb
2019-04-2319D0527-010.690 ppb
2019-07-2219G0711-01ND
2019-12-0419L0148-010.520 ppb
2020-01-2720A0522-010.560 ppb
2020-05-2620E0414-01ND
2020-06-2420F0463-01ND
2020-11-0420K0172-01ND
2021-02-0821B0208-010.700 ppb
2021-04-1921D0544-01ND
2021-08-1721H0948-01ND
2021-11-0321K0204-01ND
2022-03-0122C0055-010.520 ppb
2022-04-1822D0422-01ND
2022-08-1622H0866-01ND
2022-10-1122J0570-01ND
2023-02-0123B0067-010.430 ppb
2023-04-2523D0600-010.390 ppb
2023-07-2623G1207-01ND
2023-10-1123J0495-01ND