NR 809.25(1)(g)(g) Analysis under this section shall be conducted by a laboratory certified under ch. NR 149 using EPA methods 502.2, 524.2, 524.3, 551.1 for contaminants listed in par. (e) and EPA methods listed in s. NR 809.203, Table CM for contaminants listed in par. (f).

NR 809.25(2)(2) Sulfate monitoring. Monitoring for sulfate shall be conducted as required by the department.

NR 809.25(3)(3) Reporting requirements. Reporting requirements under this section shall be as required under s. NR 809.80.

NR 809.25(4)(4) Treatment techniques for acrylamide and epichlorohydrin. In lieu of MCLs and monitoring for acrylamide and epichlorohydrin, the following treatment techniques and reporting are required. Each water supplier for public water system shall certify annually in writing to the department using third party or manufacturer’s certification, that when acrylamide and epichlorohydrin are used in the treatment of drinking water, the combination, or product, of dose and monomer level does not exceed the levels specified as follows:

NR 809.25(4)(c)(c) A water supplier may rely on certification from manufacturers or third parties, as approved by the department.

NR 809.25 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 15-049: am. (1) (g) Register March 2016 No. 723, eff. 4-1-16.

NR 809.30NR 809.30 Distribution system microbiological contaminant maximum contaminant levels. The following are the maximum contaminant levels for coliform bacteria applicable to public water systems.

NR 809.30(1)(1) MCL for escherichia coli (E. Coli).

NR 809.30(1)(a)1.1. The public water system has an E. coli-positive repeat sample following a total coliform-positive routine sample.

NR 809.30(1)(a)2.2. The public water system has a total coliform-positive repeat sample following an E. coli-positive routine sample.

NR 809.30(1)(a)3.3. The public water system fails to take all required repeat samples following an E. coli-positive routine sample.

NR 809.30(1)(a)4.4. The public water system fails to test for E. coli when any repeat sample tests positive for total coliform.

NR 809.30(1)(b)(b) For purposes of public notification requirements in subch. VI, this is a violation that may pose an acute risk to health.

NR 809.30(2)(2) Determining compliance. The water supplier for a public water system shall determine compliance with the MCL for E. coli in sub. (1) for each monitoring period in which the public water system is required to monitor for total coliforms.

NR 809.30(3)(3) Corrective action. The water supplier shall initiate action to identify the cause of the positive bacteriological sample results and to eliminate potential health hazards which may exist in the public water system when monitoring pursuant to sub. (1) shows the presence of any coliform organisms.

NR 809.30(4)(4) heterotrophic bacteria limits. If heterotrophic bacterial plate counts on water distributed to the consumer exceed 500 organisms per milliliter, the department shall determine if the bacterial count is of public health or nuisance significance and may require appropriate action.

NR 809.30(5)(5) best available treatment techniques. Any of the following are best technology, treatment techniques, or other means available for achieving compliance with the maximum contaminant level for E. coli in sub. (1):

NR 809.30(5)(c)(c) Proper maintenance of the distribution system including appropriate pipe replacement and repair procedures, main flushing programs, proper operation and maintenance of storage tanks and reservoirs, cross connection control, and continual maintenance of positive water pressure in all parts of the distribution system.

NR 809.30(5)(d)(d) Filtration and disinfection of surface water, or disinfection of groundwater using strong oxidants such as chlorine, chlorine dioxide or ozone.

NR 809.30 NoteNote: The basic purpose of a wellhead protection program is to restrict potentially polluting activities near wells and well fields and within recharge areas of aquifers supplying water to these wells. In general, activities are more restricted close to the well and less so farther away.