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♻️ap environmental science review

NOEL (No-Observed-Effect Level) in AP Environmental Science

Written by the Fiveable Content Team
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team

Definition

The NOEL is the highest tested dose or exposure level at which no effects, adverse or otherwise, are observed in any individuals during a study.

AP course connection

Topic 8.12: 8.12 Lethal Dose 50% (LD50)

Unit 8

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NOEL (No-Observed-Effect Level) cheat sheet for homework

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