ppm

1. Also PPM, P.P.M., p.p.m. parts per million.

2. pulse per minute.

ppm

abbreviation

1. chem parts per million

2. Also: PPM. peak programme meter

Example Sentences

More than 80% of soil samples tested in 2022 — seven years after that plant closed — were above the 80 ppm threshold for lead, according to a recent report.

From Los Angeles Times

Soil testing revealed a high lead level of 110 ppm.

From Los Angeles Times

But other burned homes in the same communities had lead levels far lower, between 23 and 40 ppm.

From Los Angeles Times

Acceptable lead levels vary by state and the federal limit recently decreased from 400 ppm to 200 ppm because of increasing evidence that lead in any amount is harmful to humans.

From Los Angeles Times

High zinc levels aren’t considered toxic to humans until they reach about 23,000 ppm, Wallace said.

From Los Angeles Times