Comparison of RANK by NPI for Perceived
Risk, to Priority on CERCLA list
ATSDR
Priority
Hazardous substances from NPI and
CERCLA Priority list
NPI Rank
Not prioritised
Oxides of nitrogen
1
18
Chromium (VI) compounds
2
189
Carbon monoxide
3
Not prioritised
Carbon monoxide
4
Not prioritised
Dichloromethane
5
7
Cadmium and compounds
6
Not prioritised
Particulate matter
7
Not prioritised
Sulfuric acid
8
58
Xylenes
9
1
Arsenic compounds
10
2
Lead compounds
11