The new index, which will replace the Pollution Standard Index, adds a new category called ``unhealthful for sensitive groups'' which will fall between moderate and unhealthful smog levels.
What does PSI stand for?
PSI stands for Pollution Standard Index
This definition appears frequently and is found in the following Acronym Finder categories:
- Science, medicine, engineering, etc.
See other definitions of PSI
We have 794 other meanings of PSI in our Acronym Attic
- Platform Solutions, Inc. (Massachusetts)
- Pleural Space Infection
- Pneumonia Severity Index
- Pokémon Stars Indonesia (fan club)
- Police Sub Inspector
- Policy Studies Inc (Denver, Colorado)
- Policy Studies Institute (UK)
- Political and Social Inquiry
- Political, Social and International Studies (various locations)
- Pollutant Standards Index
Samples in periodicals archive:
The smoggiest day was June 29, when ozone levels reached an 83 pollution standard index (PSI), the state standard.