Quantitative risk assessment in collective water supply systems
DOI:
https://doi.org/10.17512/instal.2026.04.01Keywords:
milli-risk, micro-risk, nano-risk, health risk, water supplyAbstract
Risk assessment is the basis for managing technical systems from a safety perspective. The classical quantitative definition of risk is based on the probability of an undesirable event P multiplied by the associated losses C. Assuming C = 1 for fatalities, risk can be expressed as the probability of an undesirable event occurring. The aim of the study was to analyze the numerical values of risk, taking into account milli-risk (mr = 10-3), micro-risk (µr = 10-6), and nano-risk (nr = 10-9). The health risk associated with water supply use is addressed, including fatalities, chronic health impairment, and gastrointestinal complaints. Values for both individual and group risk are also presented. This paper is a review and covers standards for quantitative risk assessment related to water intended for human consumption. Health risk analysis can be used during the implementation of the Water Safety Plan.
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Copyright (c) 2026 Janusz Rak (Autor)
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