• USA

  • CANADA

  • UK

  • AUSTRALIA

  • NEW ZEALAND

  • OTHERS

https://www.ewg.org/tapwater/

https://waterdoctor.ca/water-hardness

https://dwi-production-files.s3.eu-west-2.amazonaws.com/wp-content/uploads/2021/10/11171047/hardness-map.pdf

https://www.unsw.edu.au/pfas-forever-chemicals

https://thewest.com.au/business/health/perth-childrens-hospital-drinking-water-contaminated-with-toxic-metal

https://www.foe.org.au/australian_drinking_water_updates

https://www.watercare.co.nz/home/about-us/what-we-do/water-collection-treatment-and-monitoring/water-hardness

https://www.sciencedirect.com/science/article/pii/S0048969725021898

We are currently researching hard water in other countries, until then please google your countries drinking water contaminants.