NR 809.55(5)(d)(d) The water supplier for any public water system which collects lead service line samples following partial lead service line replacement required by s. NR 809.545 shall report the results to the department within the first 10 days of the month following the month in which the water supplier receives the laboratory results, or as specified by the department. The department may waive this requirement to report these monitoring results. Water suppliers shall also report any additional information as specified by the department, and in a time and manner prescribed by the department, to verify that all partial lead service line replacement activities have taken place.

NR 809.55(6)(6) Public education program reporting requirements. By December 31st of each year, the water supplier for any public water system that is subject to the public education requirements in s. NR 809.546 shall submit a letter to the department demonstrating that the water supplier has delivered the public education materials that meet the content requirements in s. NR 809.546 (1) and (2) and the delivery requirements in s. NR 809.546 (3). This information shall include a list of all the newspapers, radio stations, television stations, facilities and organizations to which the water supplier delivered public education materials during the previous year. The water supplier shall submit the letter required by this subsection annually for as long as the public water system exceeds the lead action level.

NR 809.55(6)(a)(a) The water supplier for any public water system that is subject to the public education requirements in s. NR 809.546 shall, within ten days after the end of each period in which the public water system is required to perform public education in accordance with s. NR 809.546 (2), send written documentation to the department that contains all of the following:

NR 809.55(6)(a)2.2. A list of all the newspapers, radio stations, television stations, and facilities and organizations to which the water supplier delivered public education materials during the period in which the public water system was required to perform public education tasks.

NR 809.55(6)(b)(b) Unless required by the department, a water supplier that previously has submitted the information required by par. (a) 2. is not required to resubmit the information required by par. (a) 2., as long as there have been no changes in the distribution list and the water supplier certifies that the public education materials were distributed to the same list submitted previously.

NR 809.55(6)(c)(c) No later than 3 months following the end of the monitoring period, each water supplier shall mail a sample copy of the consumer notification of tap results to the department along with a certification that the notification has been distributed in a manner consistent with the requirements of s. NR 809.546 (4).

NR 809.55(7)(7) Reporting of additional monitoring data. Any water supplier that collects sampling data in addition to that required by this subchapter shall report the results to the department within the first 10 days following the end of the applicable monitoring period under ss. NR 809.547, 809.548 and 809.549 during which the samples are collected.

NR 809.55(8)(8) Reporting of 90th percentile lead and copper concentrations where the department calculates a public water system’s 90th percentile concentrations. The water supplier of a public water system is not required to report the 90th percentile lead and copper concentrations measured from among all lead and copper tap water samples collected during each monitoring period, as required by sub. (1) (c) 4. if any of the following are met:

NR 809.55(8)(a)(a) The department has previously notified the water supplier that it will calculate the water system’s 90th percentile lead and copper concentrations, based on the lead and copper tap results submitted pursuant to par. (b) 1., and has specified a date before the end of the applicable monitoring period by which the water supplier shall provide the results of lead and copper tap water samples.

NR 809.55(8)(b)1.1. The results of all tap samples for lead and copper including the location of each site and the criteria under s. NR 809.547 (1) (c), (d), (e), (f) or (g) under which the site was selected for the public water system’s sampling pool, pursuant to sub. (1) (c) 1.

NR 809.55 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; corrections in (1) (a), (b), (c) 4., 8., (d) (intro.) and (5) (b) 2. made under s. 13.92 (4) (b) 7., Stats., Register November 2010 No. 659; CR 15-049: am. (1) (c) (intro.), 3., (6) (a) (intro.), 1. Register March 2016 No. 723, eff. 4-1-16.

subch. III of ch. NR 809Subchapter III — Maximum Contaminant Levels, Maximum Residual Disinfectant Levels, Monitoring, Analytical Requirements and Control of Disinfection Byproducts, Disinfection Residuals and Stage 1 and Stage 2 DBP

NR 809.561(1)(1) Maximum residual disinfectant level goals. MRDLGs for disinfectants are as follows:

NR 809.561(2)(2) Maximum contaminant levels. The maximum contaminant levels (MCLs) for disinfection byproducts are as follows:

NR 809.561(3)(3) Maximum residual disinfectant levels.

NR 809.561(3)(b)(b) To achieve compliance with the maximum residual disinfectant levels identified in this subsection, water suppliers shall control treatment processes by reducing disinfectant demand and by controlling disinfection treatment processes to reduce disinfectant levels.

NR 809.561(4)(4) Best available treatment. The department, pursuant to section 1412 of the Safe Drinking Water Act and related regulations applicable to public water systems, identifies the following as the best available treatment technology, treatment techniques or other means available for achieving compliance with the maximum contaminant levels for disinfection byproducts identified in sub. (1):

NR 809.561(5)(5) Alternative treatment. The department may approve the use of alternative treatment not listed in sub. (4), if a water supplier demonstrates to the department, using pilot studies or other means, that the alternative treatment is sufficient to achieve compliance with the MCLs in sub. (2).

NR 809.562(1)(1) General. The following requirements establish criteria under which water supplier for community water systems, or CWSs, and nontransient, noncommunity water systems, or NTNCWSs, which add a chemical disinfectant to the water in any part of the drinking water treatment process shall modify their practices to meet MCLs and MRDLs in s. NR 809.561 (2) and (3) (a), respectively, and shall meet the treatment technique requirements for disinfection byproduct precursors in s. NR 809.561 (4). Water suppliers for transient noncommunity water systems, or TNCWSs, that use chlorine dioxide as a disinfectant or oxidant shall modify their practices to meet the MRDL for chlorine dioxide in s. NR 809.561 (3) (a) according to the criteria established in this section. MCLs have been established for TTHM and HAA5 and treatment technique requirements for disinfection byproduct precursors to limit the levels of known and unknown disinfection byproducts which may have adverse health effects. These disinfection byproducts may include chloroform, bromodichloromethane, dibromochloromethane, bromoform, dichloroacetic acid, and trichloroacetic acid.