Question: what are ways to test water quality?
Answer: Biological Indicators. Biological monitoring metrics is the simplest and least expensive method. ... 
Test Strips. ... 
Titration / Drop Test Kits. ... 
ATP / Luminescence Tests. ... 
Electro-Chemical Testers. ... 
Colorimetric / Comparator Test Kits. ... 
Photometric Test Kits. ... 
Spectrophotometers.