# Chapter 5: Microbial Quality of Drinking Water (Updated 2022)

- [5.1 Introduction](/australian-drinking-water-guidelines/part-2/chapter-5/5.1-introduction.md)
- [5.2 Microorganisms in drinking water](/australian-drinking-water-guidelines/part-2/chapter-5/5.2-microorganisms-in-drinking-water.md)
- [5.3 Assessing microbial risk](/australian-drinking-water-guidelines/part-2/chapter-5/5.3-assessing-microbial-risk.md)
- [5.4 Enteric pathogens](/australian-drinking-water-guidelines/part-2/chapter-5/5.4-enteric-pathogens.md)
- [5.4.1 Enteric pathogens of concern in drinking water](/australian-drinking-water-guidelines/part-2/chapter-5/5.4-enteric-pathogens/5.4.1-enteric-pathogens-of-concern-in-drinking-water.md)
- [5.4.2 Contamination of source waters with enteric pathogens](/australian-drinking-water-guidelines/part-2/chapter-5/5.4-enteric-pathogens/5.4.2-contamination-of-source-waters-with-enteric-pathogens.md)
- [5.4.3 Management of risk from enteric pathogens](/australian-drinking-water-guidelines/part-2/chapter-5/5.4-enteric-pathogens/5.4.3-management-of-risk-from-enteric-pathogens.md)
- [5.5 Opportunistic pathogens](/australian-drinking-water-guidelines/part-2/chapter-5/5.5-opportunistic-pathogens.md)
- [5.6 Cyanobacteria](/australian-drinking-water-guidelines/part-2/chapter-5/5.6-cyanobacteria.md)
- [5.7 Nuisance organisms](/australian-drinking-water-guidelines/part-2/chapter-5/5.7-nuisance-organisms.md)
- [5.7.1 Organisms causing taste and odour problems](/australian-drinking-water-guidelines/part-2/chapter-5/5.7-nuisance-organisms/5.7.1-organisms-causing-taste-and-odour-problems.md)
- [5.7.2 Organisms causing colour problems](/australian-drinking-water-guidelines/part-2/chapter-5/5.7-nuisance-organisms/5.7.2-organisms-causing-colour-problems.md)
- [5.7.3 Deposits due to iron and manganese-oxidising bacteria](/australian-drinking-water-guidelines/part-2/chapter-5/5.7-nuisance-organisms/5.7.3-deposits-due-to-iron-and-manganese-bacteria.md)
- [5.7.4 Corrosion problems due to iron and sulfur-metabolising bacteria](/australian-drinking-water-guidelines/part-2/chapter-5/5.7-nuisance-organisms/5.7.4-corrosion-problems-due-to-iron-and-sulphur-bacteria.md)
- [5.7.5 Problems caused by large numbers of microorganisms](/australian-drinking-water-guidelines/part-2/chapter-5/5.7-nuisance-organisms/5.7.5-problems-caused-by-large-numbers-of-microorganisms.md)
- [5.8 References](/australian-drinking-water-guidelines/part-2/chapter-5/5.8-references.md)