Suggest sample volumes for membrane filter test 

Volume to be Filtered, mL

100

50

10

1.0

0.1

0.01

0.001

0.00001

Lakes

X

X

Wells, springs

x

X

Water supply intake

X

x

x

Natural bathing water

x

X

X

Sewage treatment plant

X

X

x

Farm ponds, rivers

X

x

x

Stormwater runoff

X

x

x

Raw municipal sewage

x

x

x

Sewage sludge

x

x

x