Household water guides
Water
guides that help
Use these articles to understand hardness levels, compare treatment options, and avoid overbuying equipment you do not need.
Level D
Guide Mar 2026
Managing Severe Water Hardness (Level D)
Practical guidance for households with water hardness above 180 PPM, including scale control, appliance protection, and when treatment may be worth comparing.
Read guide
Level A
Guide Mar 2026
US Water Safety: Chlorine and Disinfection Byproducts
How municipal chlorine, chloramines, and disinfection byproducts work, plus practical filtration context for households.
Read guide
Need the local picture
before buying anything?
Start with a ZIP-code page first, then use the guides only when you need more context on treatment, maintenance, or symptoms.