Crossword clues for the word: PPM The word PPM has appeared as an answer to at least 12 crossword clues on different crossword puzzles. Crossword clues for PPM Showing 1 to 12 of 12 results Clue(s) Air-pollution meas. Concentration amt. Dilution meas. EPA meas. EPA pollutant concentration meas. Fluoride-in-water meas. Meas. for trace amounts Meas. of concentration Pollutant concentration meas. Pollution meas. hidden in "Lippmann" Printer ad abbr. See note