ablutions

calamity

canalization

churning

confluence

contaminated

creek

danger

dark

debris

dirty

disaster

discharges

dishwater

drain

drown

ecological

effluents

emergency

environmental

flood

flow

flush

greywater

industrial

melting

meteorology

mud

outflow

overfill

overflow

plunging

pollution

power

problem

rain

river

riverside

rubbish

sanitary

sediment

sewage

sewer

snow

stream

toxic

turbid

ugly

unhygienic

water