TABLE 1
Arithmetic means, standard deviation and maximum values of pollutants in urban storm-water run-off; 1969/71
Parameter
Dry solids g/m
3
VDS
TSS
VSS
BOD
p
tot
Ntot
Cl~ March—April
0Ü
Lead mg/m
3
Zinc
Copper
Coliforms/100ml xlO"
3
35°
44°
Agar Bacteria
22°
35°
Terrace houses
35
m
489
65
113
56
10
0.04
1.4
116
30
0.2
-
-
-
-
—
-
p/ha
s
134
12
55
36
3
0.01
0.3
18
15
—
—
-
-
-
_
-
max
800
160
800
540
25
0.15
4
200
70
1
-
-
-
-
—
-
Suburb (centre)
m
489
67
122
80
13
0.09
1.5
168
47
1
-
-
-
—
—
-
100 p/ha
s
90
11
45
38
3
0.03
0.3
34
27
—
-
-
-
—
—
-
max
2.000
140
500
360
25
0.3
4
320
100
3
-
-
—
—
—
-
Highway (65.000 vehicles
every 24 hours)
m
855
170
282
132
36
0.08
2.1
261
58
10
-
-
—
—
—
-
s
70
39
97
50
8
0.03
0.3
50
13
—
-
-
-
—
—
-
max
2.800
1.630
1.000
600
90
0.3
4
360
100
100
-
-
—
—
—
-
Whole area 50
m
516
68
129
51
9
0.08
1.2
121
41
4
278
86
43
22
107
17
s
55
11
36
18
2
0.01
0.1
27
9
—
191
42
34
16
40
10
p/ha
max
1.800
300
900
420
40
0.27
3.2
400
70
25
-
-
240
79
630
78
Ui
Comparison of Discharges from Urban Storm- Water Run-Off