Allowable values of Cause element

Code	Label	Definition
C1 Documented, lasting pollution either industrial, communal or agricultural
C2 Accidental pollution, spill
C3 Natural (hydrogeological) effects
C4 Malevolent action
C5 Other
D1 External contamination
D2 Cross connection
D3 Migration from construction materials
D4 Biofilm production
D5 Malevolent action
D6 Other
P1 Intrusions related to breaks and defects of the distribution system (including service reservoirs) caused by human, animal or plant access.
P2 Cross connection
P3 Migration from construction materials
P4 Biofilm presence
P5 Malevolent action
P6 Other
T1 Persistent insufficiency of the treatment
T2 Acute breakdown or failure
T3 Inadequate chemical dosing
T4 Disinfection by-products formation
T5 Malevolent action
T6 Human error
T7 Other