Introduction into micriobial risk analysis for groundwater

Organisers: Jack Schijven and Harold Van Den Berg

Background: Groundwater needs to be protected against contamination so that the microbial quality of the collected groundwater does not exceed a health based target like the 1/10,000 persons/ year infection risk level. Protection is achieved by a sufficient distance between a contamination source and the production well (protection zone), allowing for pathogen removal by inactivation and attachment to the soil. QMRA needs to be conducted for identified contamination sources.

Workshop Objective: Introduction into microbial risk analysis for groundwater.

Workshop Agenda: 

1. Presentations:

Vulnerability assessment 

Decision tree 

Standard contamination scenario 

QMRAwell

2. Hands-on exercises:

Protection zone calculation, simple approach + using computational tool 

QMRAwell QMRA for contamination within the protection zone using QMRAwell.