| Cause of the outbreak |
Number of probable and confirmed cases |
|
Microorganism(s) involved in the outbreak (identify as suspected or confirmed) |
|
Contributing cause(s) of the outbreak |
|
Investigation methods used to confirm outbreak (e.g. stool or water samples, interviews of ill persons, or water system assessment) |
|
Environmental sampling information (water testing, methods used, number of samples collected, time delay between outbreak notification and sample collection, local hydrogeology) |
| Size of the water system |
Number of people served per day/week |
|
Flow rate |
|
Number of connections to the water supply |
| Characteristics of the water system |
Water source (e.g. ground or surface) and description (e.g. well or spring) |
|
Water treatment (type of disinfection and filtration specified) |
|
Setting of exposure (i.e. premises type) |
|
Months the water system is in operation |
