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John,

The dangers posed by the herbicide known as atrazine have long been studied -- it's been linked to birth defects, cancer and reproductive issues, and can devastate contaminated ecosystems.[1]

It's been nearly 20 years since the E.U. effectively banned atrazine due to environmental and health concerns.[2]

But in the U.S., the very same herbicide is spread across 75 million acres of U.S. cropland annually.[3]

Tell the EPA: It's past time to stop using this toxic herbicide.
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A common weed-killer, atrazine has been shown to interfere with hormone production. Its effects are especially devastating on frogs, with one study finding that 75% of male frogs exposed to the chemical were "chemically castrated" and incapable of reproducing.[4]

Frogs aren't the only victims. Other aquatic animals including fish and molluscs have experienced die-offs after their ecosystems were contaminated with atrazine.[5]

Keep our aquatic ecosystems safe: Urge EPA Administrator Lee Zeldin to phase out atrazine.
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Because it is so widely used -- being spread across millions of acres of crops including corn and sugar cane -- atrazine has become the most commonly detected pesticide in water supplies.[6]

Forty million Americans drink water contaminated with a chemical banned in more than 60 countries -- this is not okay.[7]

When judging the health of an ecosystem, scientists often start with the frogs. If the frogs are suffering, the whole environment is in trouble.[8] And as atrazine continues to wreak havoc on frog health, we should be taking note.

Tell the EPA: Take a cue from the frogs and start phasing out atrazine today.
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Thank you,

Ellen Montgomery

1. Hiroko Tabuchi, "Kennedy's Allies Against Pesticides: Environmentalists, Moms and Manly Men," The New York Times, May 20, 2025.
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2. Hiroko Tabuchi, "Kennedy's Allies Against Pesticides: Environmentalists, Moms and Manly Men," The New York Times, May 20, 2025.
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3. Hiroko Tabuchi, "Kennedy's Allies Against Pesticides: Environmentalists, Moms and Manly Men," The New York Times, May 20, 2025.
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4. Robert Sanders, "Pesticide atrazine can turn male frogs into females," UC Berkeley News, March 1, 2010.
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5. Wesley de Lima Oliveira, Thais Fernandes Mendonça Mota, et al, "Does the atrazine increase animal mortality: Unraveling through a meta-analytic study," Science of the Total Environment, November 15, 2024.
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6. Knvul Sheikh, "What a White House Report Says (and Doesn't Say) About Pesticides and Health," The New York Times, May 22, 2025.
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7. Hiroko Tabuchi, "Kennedy's Allies Against Pesticides: Environmentalists, Moms and Manly Men," The New York Times, May 20, 2025.
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8. "What Are Frogs Worth?", American Museum of Natural History, last accessed May 30, 2025.
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