bacteria
bactericidal
bleach
business
chloride
chlorination
chlorine
clean
concept
design
dioxide
dirt
disinfect
disinfection
drawing
drinking water
element
flat
graphic
icon
illustration
image
images icon
info graphic
isolated
molecular
molecule
object
pictogram
pool
purify
purify water
raw water
school
science
sign
simple
solution
sterilization
symbol
tap water
water
web
web design