| PCA | Principal component analysis |
| PMF | Positive matrix factorization |
| RF | Random forest |
| Kp | Partition coefficient |
| S-Kp | Source-specific partition coefficient |
| Cu | Copper |
| Zn | Zinc |
| Pb | Plumbum |
| Cr | Chromium |
| As | Arsenic |
| Hg | Mercury |
| Cd | Cadmium |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.