.jpg)
The Clark Fork River and its tributaries drain most of western Montana. The upper river and headwaters were heavily impacted by wastes from over a century of mining. Today, the area is the largest Superfund environmental clean-up site in the nation.
Clark Fork Education Portal > Lessons & Activities > What is a Part Per Million?
What is a Part Per Million?
Developed by CFWEP, this lesson covers:
- Concentration measurements “parts per million” and “parts per billion”
- The definition of “concentration” and connections to everyday concentrated products
- Healthy drinking water standards
Use the links below to download the necessary materials for this lesson:
| Lesson Plan (doc format) |
| Lesson Plan (pdf format) |
| Student Worksheet (doc format) |
| Student Worksheet (pdf format) |