Physical and chemical
Examples of physical and chemical water quality indicators include:
- nutrients (e.g. nitrogen, phosphorus)
- microalgal growth (e.g. chlorophyll-a)
- water clarity (e.g. turbidity, suspended solids, Secchi depth)
- dissolved oxygen
- metals (e.g. lead, copper)
Physical and chemical indicators are used in water quality analyses and waterway assessments. They can be complemented by biological and habitat indicators when conducting such assessments.
For earlier reports on water quality monitoring visit our publications page.