Contamination risk
Low
Moderate
High
Very high
Not detected
Risk addressed
Each dot represents an outfall or soakaway managed by National Highways
A1
Leeds
Liverpool
M6
Birmingham
M1
M11
M25
Bristol
London
M4
M5
A30
Exeter
A38
Contamination risk
Very high
High
A1
Moderate
Low
Not detected
Each dot represents an
outfall or soakaway managed by National Highways
Risk addressed
Leeds
M61
Liverpool
M60
M6
Birmingham
M1
M11
M25
Bristol
M4
London
M5
A30
Exeter
A38