NR 809.80(1)(1) Reporting periods. Unless a shorter reporting period is specified in this chapter, the water supplier shall use a laboratory that will report to the department the results of any test measurement or analysis required by this chapter within one of the following time periods, whichever is shortest:

NR 809.80(1)(b)(b) The first 10 days following the end of the required monitoring period as stipulated by the department.

NR 809.80(2)(2) Violation reporting. Unless another time period is specified in this chapter, the water supplier shall report to the department, no later than 24 hours after receiving the test results, the failure to comply with any maximum contaminant level, or monitoring requirement, or treatment technique set forth in this chapter.

NR 809.80(3)(3) Reporting responsibility. The supplier of water is not required to report analytical results to the department if the laboratory doing the analysis has reported the results electronically to the department within the time frames contained in this section. The water supplier is responsible for analytical results that are not reported within the required time frames.

NR 809.80(4)(4) Electronic reporting.

NR 809.80(4)(a)(a) When determining compliance with any water quality monitoring, or drinking water maximum contaminant levels specified in this chapter, the department shall accept analytical results only from laboratories that report results directly to the department in a department approved electronic format and are certified under ch. ATCP 77, ch. NR 149 for safe drinking water analyses or laboratories approved by EPA for radionuclide analyses.

NR 809.80(4)(b)(b) Results of microbiological samples collected to satisfy requirements of subch. I shall be reported to the department and the water supplier within 24 hours of the time the results are obtained by the laboratory. When results are obtained on a weekend or holiday, the results shall be provided to the water supplier and the department as soon as practicable.

NR 809.80(4)(c)(c) Analytical results other than those under par. (b) obtained to satisfy requirements of this chapter shall be reported as required under subs. (1) and (2).

NR 809.80(4)(d)(d) The department may approve submission of compliance data required under this chapter in alternate formats on a case-by-case basis if the alternate format does not create a delay in determining compliance with any requirement in this chapter or have the potential for delaying response to a public health threat.

NR 809.80(5)(5) Public notice reporting. The water supplier, within 10 days of completion of each public notification required under subch. VII, shall submit to the department a certification that it has fully complied with the public notification regulations. The water supplier shall include with this certification a representative copy of each type of notice distributed, published, posted, or made available to the persons served by the public water system or to the media, or both.

NR 809.80(6)(6) Monthly operating reports — without filtration. A water supplier for a public water system that uses a groundwater source under the direct influence of surface water and does not provide filtration treatment shall report monthly to the department the information specified in this subsection.

NR 809.80(6)(a)(a) Source water quality information shall be reported to the department within 10 days after the end of each month the public water system serves water to the public. Information that shall be reported includes:

NR 809.80(6)(a)2.2. The number of fecal or total coliform samples, whichever are analyzed during the month, or if the water supplier monitors for both, only the number of fecal coliform samples, the dates of sample collection, and the dates when the turbidity level exceeded 1 NTU.

NR 809.80(6)(a)3.3. The number of samples during the month that had equal to or less than 20/100 ml fecal coliforms or equal to or less than 100/100 ml total coliforms, whichever are analyzed.

NR 809.80(6)(a)4.4. The cumulative number of fecal or total coliform samples, whichever are analyzed, during the previous 6 months the public water system served water to the public.

NR 809.80(6)(a)5.5. The cumulative number of samples that had equal to or less than 20/100 ml fecal coliforms or equal to or less than 100/100 ml total coliforms, whichever are analyzed, during the previous 6 months the public water system served water to the public.

NR 809.80(6)(a)6.6. The percentage of samples that had equal to or less than 20/100 ml fecal coliforms or equal to or less than 100/100 ml total coliforms, whichever are analyzed, during the previous 6 months the public water system served water to the public.

NR 809.80(6)(a)7.7. The maximum turbidity level measured during the month, the dates of occurrence for any measurements which exceeded 5 NTU, and the dates the occurrences were reported to the department.

NR 809.80(6)(a)8.8. For the first 12 months of record keeping, the dates and cumulative number of events during which the turbidity exceeded 5 NTU, and after one year of record keeping for turbidity measurements, the dates and cumulative number of events during which the turbidity exceeded 5 NTU in the previous 12 months the public water system served water to the public.

NR 809.80(6)(a)9.9. For the first 120 months of record keeping, the dates and cumulative number of events during which the turbidity exceeded 5 NTU, and after 10 years of record keeping for turbidity measurements, the dates and cumulative number of events during which the turbidity exceeded 5 NTU in the previous 120 months the public water system served water to the public.

NR 809.80(6)(b)(b) Disinfection information specified in s. NR 810.38 (1) shall be reported to the department within 10 days after the end of each month the public water system serves water to the public. Information that shall be reported includes:

NR 809.80(6)(b)1.1. For each day, the lowest measurement of residual disinfectant concentration in mg/l in water entering the distribution system.

NR 809.80(6)(b)2.2. The date and duration of each period when the residual disinfectant concentration in water entering the distribution system fell below 0.2 mg/l and when the department was notified of the occurrence.

NR 809.80(6)(b)3.3. The daily residual disinfectant concentrations (in mg/l) and disinfectant contact times (in minutes) used for calculating the CT values.