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Education Center

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General

  • What is Water?
  • History of Drinking Water and Water Filtration
  • Basic facts of drinking water
  • Drinking Water Sources (A. Tap (municipal) Water; B. Ground Water; C. Lakes, Streams, etc.; D. Well Water; E. Bottled Water; F. Filtered/Purified Water)
  • Water Quality Testing Basics
  • When Should Water be Tested?
  • Water Treatment Fundamentals
  • What are Water Quality Testers (Meters)?
  • Common TDS found in water (good and bad) / Contaminants & Impurities
  • Drinking Water Standards
  • What is bottled water? – (defined as 1. Mineral/spring, 2. Purified/Filtered, 3. Untreated)
  • The Human Body and Water
  • Benefits of Pure Water for Health
  • Benefits of Mineral Water for Health
  • Disadvantages of Drinking Pure Water
  • Disadvantages of Drinking Mineral Water
  • Water Conservation
  • Glossary

Water Problems

Parameters

Filtration & Purification Processes

  • Chemical Disinfection/Oxidants – Chlorination
  • Chemical Disinfection/Oxidants - Ultraviolet Light (UV)
  • Chemical Disinfection/Oxidants - Ozonation
  • Filtration – Granular Filtration
  • Filtration – Direct Filtration
  • Filtration – Slow Sand Filtration
  • Filtration – Bag/Cartridge Filtration
  • Filtration – Ceramic Filtration
  • Filtration – Biosand Filtration
  • Membrane Process – Microfiltration
  • Membrane Process – Ultrafiltration
  • Membrane Process – Nanofiltration
  • Membrane Process – Electrodialysis/Electrodialysis Reversal
  • Reverse Osmosis FAQs
  • Absorption and Ion Exchange Systems – Activated Carbon (Powdered and Granular)
  • Deionization Absorption and Ion Exchange Systems – Ion Exchange (DI)
  • Absorption and Ion Exchange Systems – Activated Alumina
  • Solar Treatment – Solar Disinfection & Distillation
  • Distillation
  • The future of Water Filtration & Purification

Industries and Applications

  • Fruit and Vegetable Washing (ORP)
  • Environmental Testing
  • Vineyards and Wineries (pH)
  • Horticulture
  • Metal Finishing (ORP)
  • Ozone System Monitoring (ORP)
  • Pulp Bleaching (ORP)
  • Printing Industry
  • Pharmaceutical and Medical
  • Laboratory Science
  • Circuit Board/ Semiconductor Manufacturing
Products for Water Quality

Learn about HM Digital's line of water quality testing products.

Did You Know?

Water is our planet's most precious resource.

  • The average American uses about 50 gallons (190 liters) of water daily.
  • Flushing a toilet uses 2 to 7 gallons (7.5 to 26.5 liters) of water.
  • A five-minute shower uses 25 to 50 gallons (95 to 190 liters) of water.
  • Leaving the water on while brushing your teeth wastes 2 gallons (7.5 liters) of water each time!
  • At least 400 million people live in regions with severe water shortages.