Oklahoma Department of Transportation | Illicit Discharge Detection and Elimination Page 1 of 2
ODOT IDDE
Physical Observation Guide
Trickle flow
Moderate (clear) flow
Significant (clear) flow
Blue-green discharge
White discharge
Red-orange discharge
Turbid standing water
Brown (highly turbid) discharge (illicit)
Brown (moderately turbid) discharge (illicit)
Floatables (plastics, debris etc)
Foam / suds
Foam / suds
F
L
O
W
C
O
L
O
R
T
U
R
B
I
D
I
T
Y
F
L
O
A
T
A
B
L
E
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Oklahoma Department of Transportation | Illicit Discharge Detection and Elimination Page 1 of 2
ODOT IDDE
Physical Observation Guide
Trickle flow
Moderate (clear) flow
Significant (clear) flow
Blue-green discharge
White discharge
Red-orange discharge
Turbid standing water
Brown (highly turbid) discharge (illicit)
Brown (moderately turbid) discharge (illicit)
Floatables (plastics, debris etc)
Foam / suds
Foam / suds
F
L
O
W
C
O
L
O
R
T
U
R
B
I
D
I
T
Y
F
L
O
A
T
A
B
L
E