Publicly owned treatment works and privately owned
domestic sewage treatment works shall meet as a minimum the effluent limits
specified in this section.
(1) Where
the receiving water is classified as fish and aquatic life in s.
NR 102.04(3):
(a) The following effluent limits for BOD 5
apply:
1. The 30-day average may not exceed 30
mg/l.
2. The 7-day average may not
exceed 45 mg/l.
3. The 30-day
average percent removal may not be less than 85%.
(b) The following effluent limits for SS
apply:
1. The 30-day average may not exceed
30 mg/l.
2. The 7-day average may
not exceed 45 mg/l.
3. The 30-day
average percent removal may not be less than 85%.
(c) The effluent pH shall be within the range
of 6.0 to 9.0.
(d) Upon request by
the permittee, pursuant to s.
NR 210.07(4), the department may
substitute the parameter CBOD 5 for the parameter BOD 5 and the levels of
effluent quality specified in par. (a) . The following effluent quality levels
of CBOD 5 shall be applicable:
1. The 30-day
average may not exceed 25 mg/l.
2.
The 7-day average may not exceed 40 mg/l.
3. The 30-day average percent removal may not
be less than 85%.
(e)
More stringent effluent limitations than those specified in pars. (a) to (d)
may be imposed for any pollutant where necessary to meet water quality
standards for water receiving the treated discharge.
(2) Where the receiving water is classified
as intermediate aquatic life as defined in s.
NR 104.02(3) (a):
(a) The following effluent limits for BOD 5
apply:
1. The 30-day average may not exceed 15
mg/l.
2. The daily maximum may not
exceed 30 mg/l.
3. The 30-day
average percent removal may not be less than 85%.
(b) The following effluent limits for SS
apply:
1. The 30-day average may not exceed
20 mg/l.
2. The daily maximum may
not exceed 30 mg/l.
3. The 30-day
average percent removal may not be less than 85%.
(d) The effluent pH shall be within the range
of 6.0 to 9.0.
(e) The daily
minimum effluent dissolved oxygen level shall be 4.0mg/l.
(f) Upon request by the permittee, pursuant
to s.
NR 210.07(4),the department may
substitute the parameter CBOD 5 for the parameter BOD 5 and the levels of
effluent quality specified in par. (a) . The following effluent quality levels
of CBOD 5 shall be applicable:
1. The 30-day
average may not exceed 12 mg/l.
2.
The daily maximum may not exceed 25 mg/l.
3. The 30-day average percent removal may not
be less than 85%.
(g)
More stringent effluent limitations than those specified in pars. (a) to (f)
may be imposed for any pollutant where necessary to meet water quality
standards for water receiving the treated discharge.
(3) Where the receiving water is classified
as marginal surface water as defined in s.
NR 104.02(3) (b):
(a) The following effluent limits for BOD 5
apply:
1. The 30-day average may not exceed 20
mg/l.
2. The 7-day average may not
exceed 30 mg/l.
3. The 30-day
average percent removal may not be less than 85%.
(b) The following effluent limits for SS
apply:
1. The 30-day average may not exceed
20 mg/l.
2. The 7-day average may
not exceed 30 mg/l.
3. The 30-day
average percent removal may not be less than 85%.
(c) The effluent pH shall be within the range
of 6.0 to 9.0.
(d) The daily
minimum effluent dissolved oxygen level shall be 4.0mg/l.
(e) Upon request by the permittee, pursuant
to s.
NR 210.07(4),the department may
substitute the parameter CBOD 5 for the parameter BOD 5 and the levels of
effluent quality specified in par. (a) . The following effluent quality levels
of CBOD 5 will be applicable:
1. The 30-day
average may not exceed 16 mg/l.
2.
The 7-day average may not exceed 25 mg/l.
3. The 30-day average percent removal may not
be less than 85%.
(f)
More stringent effluent limitations than those specified in pars. (a) to (e)
may be imposed for any pollutant where necessary to meet water quality
standards for water receiving the treated discharge.
(4) Effluent limitations may be imposed for
pollutants other than those specified in subs. (1) to (3) where necessary to
meet water quality standards for waters receiving the treated discharge.
(5) When determining whether more
stringent effluent limitations are required under this section to meet water
quality standards in the receiving water or downstream waters, the department
shall apply the reasonable potential procedures in s. NR 205.067.
