grey water
water in rivers and swamps (= areas of wet land) that is dark in colour because it contains matter from dead plants:
You may find them at other black water wetland areas as well.
Cuyabeno is a region of wet tropical forests crossed by seasonal blackwater creeks and rivers.
Unlike black water, grey water does not contain human waste.
It was not immediately clear how much blackwater had entered the river.
Officials announced a crackdown on the company for a series of blackwater spills and other environmental violations.
Cottonmouth snakes are abundant in the blackwater swamps.
SMART Vocabulary: related words and phrases Building: plumbing, pipes & sewage
ballcock
catch basin
caulking
cesspit
cistern
hot-water tank
hydrant
influent
isolator
leakage
mixer tap
plumb
plunger
sewage
sewage works
sewer
siphon
spigot
standpipe
waterworks
You can also find related words, phrases, and synonyms in the topics:
Environmental issues
Water in general