action level

noun

Definition of action level

: the level of concentration of a harmful or toxic substance or contaminant (such as lead, asbestos, benzene, or radiation) that when exceeded is considered sufficient to warrant regulatory or remedial action Two-thirds of the more than 6,000 homes it tested in 2003 had lead levels exceeding the Environmental Protection Agency's “action level”—the safety level at which federal law requires a water system to take prompt steps to reduce lead levels and notify the public.— Erik D. Olson, Washington Post, 8 Feb. 2004 Future clam digs are dependent on marine toxin levels, but the first set of samples dug last Sunday showed all results were still below the action level.— Mark Yuasa, Seattle Times, 25 Oct. 2009

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of action level

1967, in the meaning defined above

Learn More About action level

Time Traveler for action level

Time Traveler

The first known use of action level was in 1967

See more words from the same year

Dictionary Entries Near action level

actionless

action level

action noun

See More Nearby Entries 

Statistics for action level

Cite this Entry

“Action level.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/action%20level. Accessed 18 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Name that Thing: Flower Edition

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!