| Answer | Crossword Clue |
|---|---|
| PPM | Concentration amt. |
| PPM | EPA meas. |
| PPM | Fluoride-in-water meas. |
| PPM | Air-pollution meas. |
| PPM | EPA pollutant concentration meas. |
| PPM | Printer ad abbr. |
| Answer | Crossword Clue |
|---|---|
| PPM | Concentration amt. |
| PPM | EPA meas. |
| PPM | Fluoride-in-water meas. |
| PPM | Air-pollution meas. |
| PPM | EPA pollutant concentration meas. |
| PPM | Printer ad abbr. |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.