alert
bacteria
bad
ban
basin
caution
clean
contaminated
contamination
danger
dirty
disease
do not drink
drink
drinkable
drinking
faucet
flow
flowing
forbidden
gray
hands
hygiene
liquid
non potable
nonpotable
notice
passenger train
pictogram
potable
prohibited
public toilet
risk
rusty
safety
sign
signage
stream
symbol
tap
toilet
train
warning
wash
water