Table 6-1.
Typical effluent levels of principal domestic wastewater characteristics
by degree of treatment (mg/L unless noted otherwise)
Wastewater Treatment
.
Advanceda
Average
Raw
(1)
(2)
(4)
3
(5)--
Parameter
b
(3)+PR C
Wastewater
(4)+SSORd
Primary
Secondary (l)+(2)+NR
BOD
e
300
195
30
15
5
1
600
COD
400
150
100
45
12
e
300
120
Suspended Solids
30
20
10
1
Amnonia (as N)
25
28
25
3
3
3
Phosphate (as P)
20
18
14
13
2
1
pH (units)
6-9e
7
6-9
6-9
6-9
6-9
e
1,000,000
Fecal Coliform
15,000
200
200
200
100
(no. /100 mL)
a
Reasonable levels but not necessarily minimum for all constituents.
b
NR = Nitrogen Removal or Conversion
C
PR = Phosphorus Removal
d
SSOR = Suspended Solids and Organics Removal
e
Environmental Protection Agency, Secondary Treatment Information, 40 CFR, Part 133,
Federal
Register, Monday, 30 April 1973.
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