NR 210.04(1)(1)
Discharges subject to the provisions of this chapter shall at a minimum monitor the effluent for BOD
5, SS, and pH.
NR 210.04(2)
(2) Influent wastewater strengths and volumes shall be characterized at treatment facilities subject to the monitoring provisions of sub.
(1) by monitoring for flow, BOD
5 and SS.
NR 210.04(3)
(3) Monitoring requirements may be adjusted on a case-by-case basis depending on wastewater characteristics and their potential to degrade water quality.
NR 210.04(4)
(4) The department shall require the use of 24-hour flow proportional samplers for monitoring influent and effluent wastewater quality except where the department determines through the permit issuance process that other sample types may adequately characterize the influent or effluent quality. In evaluating permit monitoring requirements, the department may consider:
NR 210.04(4)(c)
(c) Previous performance records as reported on the discharge monitoring report;
NR 210.04(4)(d)
(d) Type of wastewater treated: domestic, municipal or industrial wastewater; and
NR 210.04 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 210.05
NR 210.05 Effluent limitations. Publicly owned treatment works and privately owned domestic sewage treatment works shall meet as a minimum the effluent limits specified in this section.
NR 210.05(1)(c)
(c) The effluent pH shall be within the range of 6.0 to 9.0.
NR 210.05(1)(d)
(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:
NR 210.05(1)(e)
(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.
NR 210.05(2)(d)
(d) The effluent pH shall be within the range of 6.0 to 9.0.
NR 210.05(2)(e)
(e) The daily minimum effluent dissolved oxygen level shall be 4.0mg/l.
NR 210.05(2)(f)
(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:
NR 210.05(2)(g)
(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.
NR 210.05(3)(c)
(c) The effluent pH shall be within the range of 6.0 to 9.0.
NR 210.05(3)(d)
(d) The daily minimum effluent dissolved oxygen level shall be 4.0mg/l.
NR 210.05(3)(e)
(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
5will be applicable:
NR 210.05(3)(f)
(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.
NR 210.05(4)
(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.
NR 210.05(5)
(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.
NR 210.05 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86;
CR 03-050: r. (2) (c)
Register February 2004 No. 578, eff. 3-1-04; correction in (1) (intro.) made under s. 13.93 (2m) (b) 7., Stats.,
Register February 2004 No. 578;
CR 17-002: cr. (5)
Register April 2018 No. 748, eff. 5-1-18.
NR 210.06
NR 210.06 Disinfection requirements. NR 210.06(1)(1)
Disinfection requirements. Disinfection shall be required of dischargers subject to the provisions of this chapter when the department determines, based on the information identified in sub.
(3), the discharge of wastewater poses a risk to human and animal health. Disinfection shall be required:
NR 210.06(1)(a)
(a) From May 1 through September 30 annually to protect recreational uses, or
NR 210.06(1)(c)
(c) The period during which disinfection under pars.
(a) and
(b) is required may be adjusted in a WPDES permit where necessary to protect human and animal health.
NR 210.06(2)
(2) Effluent limitations. Where and when disinfection is required, the following effluent limitations shall apply:
NR 210.06(2)(a)1.1. `Recreation protection.' During the period of disinfection to protect recreational uses as determined under sub.
(1) (a) or
(c), all of the following shall apply:
NR 210.06(2)(a)1.a.
a. The geometric mean of
E. coli bacteria in effluent samples collected in any calendar month may not exceed 126 counts/100 mL.
NR 210.06 Note
Note: To calculate the geometric mean, a value of 1 should be used for any result of 0.
NR 210.06 Note
Note: As specified in ch.
NR 102, Table A, for determining attainment or compliance with bacteria criteria or limits, counts are equivalent to either colony forming units or most probable number.
NR 210.06(2)(a)1.b.
b. No more than 10 percent of
E. coli bacteria samples collected in any calendar month may exceed 410 counts/100 mL.
NR 210.06 Note
Note: U.S. EPA developed the
E. coli criteria in s.
NR 102.04 (6), on which these effluent limits are based using membrane filtration to count
E. coli colony forming units.
NR 210.06(2)(a)2.
2. `Public drinking water supply protection.' If a facility is required to disinfect to protect public drinking water supplies outside of the recreation period specified in sub.
(1) (a) or
(c), it may either continue to meet the
E. coli limits specified in par.
(a) 1. year-round, or the geometric mean of the fecal coliform bacteria for effluent samples collected in a period of 30 consecutive days may not exceed 400 counts/100 mL.
NR 210.06(2)(b)
(b)
Chlorine. When chlorine is used for disinfection, the daily maximum total residual chlorine concentration of the discharge may not exceed 0.1mg/l. In addition, when chlorine is used for disinfection, a dechlorination process shall be in operation for the period during which disinfection is required.
NR 210.06 Note
Note: The 0.1 mg/l total residual chlorine limit reflects best analytical technique for domestic wastewater effluents. An effluent limitation for total residual chlorine based on best available technology for dechlorination of effluents was determined to be below detection levels of currently available analytical techniques.
NR 210.06 Note
Note: Compliance schedules for effluent limits established under this subsection are authorized in s.
NR 205.14 and procedures are detailed in s.
NR 106.117. Language on tentative and final determinations related to the permit, public notice processes, and review procedures are provided for all facilities in ch.
NR 203.
NR 210.06(3)
(3) Disinfection determination. A permittee subject to this chapter shall at the time of application for a WPDES permit provide information identified in this subsection which the department shall use in the determination of the need for effluent disinfection. The following information shall be used in identifying risks to human and animal health:
NR 210.06(3)(a)
(a) Proximity of the wastewater outfall to swimming beaches and other waters which have a high level of human contact recreational activities.
NR 210.06(3)(b)
(b) Proximity of the wastewater outfall to public drinking water supply intakes. At a minimum, whenever a drinking water intake is within a radius of 5 miles of a wastewater outfall in a lake or impoundment or within 20 miles downstream of a wastewater outfall on a flowing surface water, disinfection shall be provided.
NR 210.06(3)(c)
(c) Proximity of the wastewater outfall to wetlands which support populations of waterfowl subject to disease outbreaks, which may be caused by the discharge of wastewater which has not been disinfected.
NR 210.06(3)(e)
(e) Dilution and mixing characteristics of the wastewater with the receiving water.
NR 210.06(3)(f)
(f) Bacterial indicator organism levels or sanitary survey results from sampling conducted in the vicinity of the wastewater outfall and near the sites used for recreational purposes.
NR 210.06(3)(h)
(h) The detention time of the wastewater treatment system. Except in extenuating circumstances, the discharge of wastewater to surface water from a treatment system with a detention time of 180 days or longer does not pose a risk to human and animal health.
NR 210.06(3)(i)
(i) Other factors that are necessary to determine if there is a risk posed to human and animal health by the discharge of wastewater that has not been disinfected.
