# What happens before the tap?

Five simplified treatment-stage schematics with annotations for particle binding, gentle mixing, settling, filtration and disinfection, plus a note that actual systems vary.

AI / UNTANGLED

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/annotateddiagram

What happens before the tap?

A conceptual look inside common water-treatment stages

01

Coagulation

Help small particles

bind.

02

Flocculation

Mix gently to form

flocs.

03

Sedimentation

Heavier flocs settle.

04

Filtration

Pass water through

filters.

05

Disinfection

Use treatment to kill

germs.

Treatment differs by source water and community. The diagram does not show every treatment step or

certify a supply's safety.

Conceptual common treatment stages, not a plant drawing or operating procedure.

Source: U.S. Centers for Disease Control and Prevention | Page dated February 6, 2024; retrieved October 31, 2026

https://www.cdc.gov/drinking-water/about/how-water-treatment-works.html

Original AI Untangled educational visual • Source-based example • Not an official agency graphic

[Official source](https://www.cdc.gov/drinking-water/about/how-water-treatment-works.html)