sewage treatment plant
along the river
and blue
autumn sky
bank
beverage
blue sky
chimney
cloud
drinking water
facilities management
facility
factory
factory tour
filtration
grass
iron
japan
labor
lights
lightup
management
plant manager
processing
production
river
rivers
saitama
saitama prefecture
send
sewage
sky
stains
stairs
sun
toda
treatment plant
turf
water
water pipe
water purification
water supply
white