NR 810.39(2) (2) Water suppliers for filtered systems shall report the Cryptosporidium bin classification of their system to the department as described in s. NR 810.34.

NR 810.39(3) (3) Water suppliers for unfiltered GWUDI systems shall report the mean source water Cryptosporidium level of their system to the department as described in s. NR 810.36.

NR 810.39(4) (4) Water suppliers for filtered and unfiltered systems shall report disinfection profiles and benchmarks to the department as described in s. NR 810.32 prior to making a significant change in disinfection practice.

NR 810.39(5) (5) Water suppliers for filtered and unfiltered systems shall report to the department in accordance with the following table for any microbial toolbox options used to comply with treatment requirements under s. NR 810.35 or 810.36. Alternatively, the department may approve a system to certify operation within required parameters for treatment credit rather than reporting monthly operational data for toolbox options.

Microbial Toolbox Reporting Requirements

- See PDF for table

NR 810.39 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

NR 810.40 NR 810.40 Recordkeeping requirements.

NR 810.40(1) (1) Public water systems shall keep results from the initial round of source water monitoring under s. NR 809.331 (1) and the second round of source water monitoring under s. NR 809.331 (2) until 3 years after bin classification under s. NR 810.34 for filtered systems or determination of the mean Cryptosporidium level under s. NR 810.35 for unfiltered GWUDI systems for the particular round of monitoring.

NR 810.40(2) (2) Public water systems shall keep any notification to the department that the systems will not conduct source water monitoring due to meeting the criteria of s. NR 809.331 (4) for 3 years from the date of notification.

NR 810.40(3) (3) Public water systems shall keep the results of treatment monitoring associated with microbial toolbox options under ss. NR 810.42 to 810.46 for 3 years from the date of monitoring.

NR 810.40 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

subch. III of ch. NR 810 Subchapter III — Toolbox Options for Meeting Enhanced Treatment for Cryptosporidium Requirements

NR 810.41 NR 810.41 Microbial toolbox options.

NR 810.41(1) (1) 

NR 810.41(1)(a) (a) Public water systems receive the treatment credits listed in the table in sub. (2) by meeting the conditions for microbial toolbox options described in ss. NR 810.42 to 810.46. Systems apply these treatment credits to meet the treatment requirements in s. NR 810.35 or 810.36, as applicable.

NR 810.41(1)(b) (b) Unfiltered GWUDI systems are eligible for treatment credits for the microbial toolbox options described in s. NR 810.46 only.

NR 810.41(2) (2) The following table summarizes options in the microbial toolbox:

Microbial Toolbox Summary Table: Options, Treatment Credits, and Criteria

- See PDF for table

NR 810.41 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10.

NR 810.42 NR 810.42 Source toolbox components.

NR 810.42(1) (1) Watershed control program. Systems receive 0.5-log Cryptosporidium treatment credit for implementing a watershed control program that meets the requirements of this section.

NR 810.42(1)(a) (a) Water suppliers for systems that intend to apply for the watershed control program credit shall notify the department of this intent no later than 2 years prior to the treatment compliance date applicable to the system in s. NR 810.37.

NR 810.42(1)(b) (b) Water suppliers for systems shall submit to the department a proposed watershed control plan no later than one year before the applicable treatment compliance date in s. NR 810.37. The department shall approve the watershed control plan for the system to receive watershed control program treatment credit. The watershed control plan shall include the following elements:

NR 810.42(1)(b)1. 1. Identification of an “area of influence” outside of which the likelihood of Cryptosporidium or fecal contamination affecting the treatment plant intake is not significant. The area of influence is the area to be evaluated in future watershed surveys under subd. 2.

NR 810.42(1)(b)2. 2. Identification of both potential and actual sources of Cryptosporidium contamination and an assessment of the relative impact of these sources on the system’s source water quality.

NR 810.42(1)(b)3. 3. An analysis of the effectiveness and feasibility of control measures that could reduce Cryptosporidium loading from sources of contamination to the system’s source water.

NR 810.42(1)(b)4. 4. A statement of goals and specific actions the system will undertake to reduce source water Cryptosporidium levels. The plan shall explain how the actions are expected to contribute to specific goals, identify watershed partners and their roles, identify resource requirements and commitments, and include a schedule for plan implementation with deadlines for completing specific actions identified in the plan.