NR 809.562(2)(e)(e) A consecutive system that does not add a disinfectant but delivers water that has been treated with a primary or residual disinfectant other than ultraviolet light, shall comply with analytical and monitoring requirements for chlorine and chloramines in s. NR 809.565 (6) (a) and the compliance requirements in s. NR 809.566 (3) (a) beginning April 1, 2009 and shall report monitoring results under s. NR 809.567 (3).

NR 809.562(3)(3) Operator certification. Each CWS and NTNCWS regulated under s. NR 809.561 shall be operated by qualified personnel who meet the requirements specified in ch. NR 114, subchs. I and III and are included in a department register of qualified operators.

NR 809.562(4)(4) Response to microbiological contamination. Notwithstanding the MRDLs in s. NR 809.561 (3) (a), water suppliers for public water systems may increase in the distribution system residual disinfectant levels of chlorine or chloramines, but not chlorine dioxide, to a level and for a time necessary to protect public health, to address specific microbiological contamination problems caused by circumstances such as, but not limited to, distribution line breaks, storm run-off events, source water contamination events or cross-connection events.

NR 809.562(5)(5) Public notification of MCL or MRDL violations. The water supplier of a public water system shall provide public notification in compliance with subch. VII when the MCL or MRDL or disinfectant residual is exceeded.

NR 809.562(6)(6) Required additional health information. Water suppliers for CWSs that detect TTHM above 0.080 mg/l, but are not in violation of the MCL in s. NR 809.561 (2), based on an annual average, monitored and calculated under the provisions of s. NR 809.565, shall provide copies of health effects language prescribed in subch. VII and s. NR 809.835 to the users of the CWS in the CCR.

NR 809.562 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 15-049: am. (3) Register March 2016 No. 723, eff. 4-1-16; correction in (3) made under s. 35.17, Stats., Register March 2016 No. 723, eff. 4-1-16.

NR 809.563(1)(1) General. Water suppliers shall use only the analytical methods specified in this section, or otherwise approved by EPA for monitoring under this subchapter, to demonstrate compliance with the requirements of this subchapter.

NR 809.563(2)(2) Approved analytical methods for disinfectant residuals. Water suppliers shall measure residual disinfectant concentrations for total chlorine, free chlorine, combined chlorine chloramines, and chlorine dioxide by the methods listed in Table R. Water suppliers may also measure residual disinfectant concentrations for chlorine, chloramines and chlorine dioxide by using N,N-diethly-p-phenylenediamine (DPD) colorimetric using a colorimeter as prescribed in the approved methods.

NR 809.563(3)(3) Approved analytical methods for disinfectant byproducts. Water suppliers shall measure disinfection byproducts by the methods, as modified by the footnotes, prescribed in Table S. Samples for TTHM shall be dechlorinated upon collection to prevent further production of trihalomethanes, according to the procedures described in the methods, except acidification is not required if only THMs or TTHMs are to be determined. Samples for maximum TTHM potential shall not be dechlorinated or acidified, and shall be held for 7 days at 25° C or above prior to analysis. Samples for bromate analyzed using EPA method 321.8 samples must be preserved at the time of sampling with 50 mg ethylenediamine (EDA)/L of sample and must be analyzed within 28 days. Samples for TTHM and HAA5 shall be collected using the containers, preservative and holding times specified in s. NR 809.203 (4) Table D. In all cases, samples should be analyzed as soon after collection as possible.

1 X indicates method is approved for measuring specified disinfectant residual. Free chlorine or total chlorine may be measured for demonstrating compliance with the chlorine MRDL and combined chlorine, or total chlorine may be measured for demonstrating compliance with the chloramine MRDL.

2 Standard Methods for the Examination of Water and Wastewater, 19th edition (1995), 20th edition (1998), 21st edition (2005), 22nd edition (2012). Available from American Public Health Association, 800 I Street, NW., Washington, DC, 20001-3710.

3 The Standard Methods Online version that is approved is indicated by the last two digits in the method number which is the year of approval by the Standard Method Committee. Standard Methods Online are available athttp://www.standardmethods.org.

1 P&T = purge and trap; GC = gas chromatography; ELCD = electrolytic conductivity detector; PID = photoionization detector; MS = mass spectrometer; LLE = liquid/liquid extraction; ECD = electron capture detector; SPE = solid phase extraction; IC = ion chromatography; ICP-MS= inductively coupled plasma/mass spectrometer.

8 Amperometric titration or spectrophotometry may be used for routine daily monitoring of chlorite at the entrance to the distribution system, as prescribed in NR 809.565(3)(a)1. Ion chromatography must be used for routine monthly monitoring of chlorite and additional monitoring of chlorite in the distribution system, as prescribed in NR 809.565(30(a) 2. and. NR 809.565 (3) (a)3.

9 The Standard Methods Online version that is approved is indicated by the last two digits in the method number which is the year of approval by the Standard Method Committee. Standard Methods Online are available at http://www.standardmethods.org.

NR 809.563(4)(4) Laboratory certification for disinfectant byproducts. Laboratories that are certified by the department or EPA shall conduct the analysis under this section for disinfection byproducts.

NR 809.563(4)(a)(a) To receive certification to conduct analyses for the contaminants in this subchapter, a laboratory shall analyze performance evaluation samples approved by the department or EPA at least once during each consecutive 12-month period by each method for which a laboratory desires certification.