Water testing

Linkdump

A good overview on the biological and chemical contaminants, through to the pros and cons of home test kits, and how to read them. Bias warning: includes ads for kits at the end.

https://worldwaterreserve.com/how-to-test-water-quality/

Good page on low cost microbial testing

https://blogs.worldbank.org/water/how-test-water-quality-low-cost-low-tech-options-microbial-testing

Interesting project on Makezine using water conductivity measurements with a simple circuit and speaker to find and 'hear' impurities

https://makezine.com/projects/build-a-water-quality-tester-you-can-hear/