Subchapter 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 Maximum residual disinfectant level goals (MRDLGs), and maximum contaminant levels (MCLs) for disinfection byproducts, maximum residual disinfectant levels (MRDLs) and best available treatment. NR 809.562 General requirements for disinfection byproducts and disinfection residuals Stage 1 DBP. NR 809.563 Analytical requirements for disinfection byproducts and disinfection residuals Stage 1 DBP and Stage 2 DBP. NR 809.565 Monitoring requirements for disinfection byproducts and disinfection residuals Stage 1 DBP. NR 809.566 Compliance requirements for disinfection byproducts and disinfection residuals Stage 1 DBP. NR 809.567 Reporting and recordkeeping requirements for disinfection byproducts and disinfection residuals for Stage 1 DBP. NR 809.569 Treatment technique for control of disinfection byproduct (DBP) precursors. NR 809.60 General requirements for Stage 2 DBP disinfection byproducts control. NR 809.61 Routine monitoring for Stage 2 DBP. NR 809.62 Monitoring plan for Stage 2 DBP. NR 809.63 Requirements for reduced and increased monitoring for Stage 2 DBP. NR 809.64 Additional disinfection byproducts requirements for consecutive systems under Stage 2 DBP. NR 809.65 Operational evaluation levels for disinfection byproducts under Stage 2 DBP. NR 809.66 Requirements for remaining on reduced TTHM and HAA5 monitoring based on Stage 1 DBP results. NR 809.67 Requirements for remaining on increased TTHM and HAA5 monitoring based on Stage 1 DBP results. NR 809.68 Reporting and recordkeeping requirements for Stage 2 DBP. Subchapter IV — Miscellaneous Chemical Monitoring Requirements, Raw Surface Water Standards, and Certified Laboratories
NR 809.70 Secondary inorganic chemical and physical standards. NR 809.71 Sampling and analytical requirements for secondary standards. NR 809.73 Sampling and analytical requirements for other chemicals. NR 809.74 Additional requirements for public water systems which chlorinate or fluoridate water. NR 809.75 Raw surface water standards. NR 809.76 Laboratory certification. NR 809.77 Monitoring of consecutive public water systems. Subchapter V — Reporting, Consumer Confidence Reports and Record Keeping
NR 809.80 Reporting requirements. NR 809.82 Record maintenance. NR 809.83 Consumer confidence report applicability and deadlines. NR 809.833 Content of consumer confidence reports. NR 809.835 Required additional health information for consumer confidence reports. NR 809.837 Consumer confidence report delivery and recordkeeping. Subchapter VI — Conditional Waivers and Variances
NR 809.90 Conditional waivers. NR 809.905 Conditional waivers from the maximum contaminant levels for uranium. NR 809.91 Nitrate variances. Subchapter VII — Public Notification of Drinking Water Violations
NR 809.950 General public notification requirements. NR 809.951 Tier 1 public notice — form, manner, and frequency of notice. NR 809.952 Tier 2 public notice--form, manner, and frequency of notice. NR 809.953 Tier 3 public notice--form, manner, and frequency of notice. NR 809.954 Public notice content. NR 809.955 Notice to new billing units or new customers. NR 809.956 Special notice of the availability of unregulated contaminant monitoring results. NR 809.957 Special notice for exceedance of the secondary maximum contaminant level for fluoride. NR 809.958 Special notice for nitrate exceedances above MCL by non-community water systems, where granted permission by the department under s. NR 809.11 (3). NR 809.959 Public notice by the department on behalf of the public water system. NR 809.960 Special notice for significant deficiencies or source groundwater fecal contamination. NR 809.970 Special notice for repeated failure to conduct monitoring of the source water for Cryptosporidium and for failure to determine bin classification or mean Cryptosporidium level. Ch. NR 809 NoteNote: Chapter NR 809 as it existed on November 30, 2010, was repealed and a new chapter NR 809 was created effective December 1, 2010.
NR 809.01NR 809.01 Purpose. The purpose of this chapter is to establish minimum standards and procedures for the protection of the public health, safety and welfare in the obtaining of safe drinking water. This chapter is adopted under the authority granted in chs. 280 and 281, Stats. NR 809.01 NoteNote: See chs. NR 108, 114, 810, 811 and 812 for other requirements pertaining to public and private drinking water systems. NR 809.01 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 809.02NR 809.02 Departmental justification. NR 809.02(1)(1) Where the department exercises discretion allowed under this chapter to require a water supplier for a public water system to perform construction, repairs, monitoring or other activities which would necessitate expenditure of resources, the department shall explain in writing the reasons for the requirements. NR 809.02(2)(2) A decision by the department to grant a waiver shall be made in writing and shall set forth the basis for the determination. The waiver determination may be initiated by the department or upon an application by the water supplier for a public water system. NR 809.02 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 809.03NR 809.03 Applicability. The provisions of this chapter shall apply to all new and existing public water systems, water suppliers, and laboratories certified to analyze drinking water. NR 809.04NR 809.04 Definitions. In this chapter: NR 809.04(1)(1) “Action level” is the concentration of lead or copper in water which determines, in some cases, the treatment requirements that a public water system is required to complete. NR 809.04(2)(2) “Best available technology” or “BAT” means the best technology treatment techniques, or other means which the U.S. environmental protection agency finds, after examination for efficacy under field conditions and not solely under laboratory conditions, are available, taking cost into consideration. NR 809.04(2g)(2g) “Circuit rider” means a roving technical expert employed by a state rural water association to provide training and assistance to rural and small water utilities within the state. NR 809.04(2r)(2r) “Clean compliance history” means a record of no E. coli MCL violations under s. NR 809.31; no monitoring violations under s. NR 809.312; and no coliform treatment technique trigger exceedances or treatment technique violations under s. NR 809.313. NR 809.04(3)(3) “Coagulation” means a process using coagulant chemicals and mixing by which colloidal and suspended materials are destabilized and agglomerated into flocs. NR 809.04(4)(4) “Combined distribution system” means an interconnected distribution system consisting of the distribution systems of wholesale systems and of the consecutive systems that receive finished water. NR 809.04(5)(5) “Community water system” or “CWS” means a public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. Any public water system serving 7 or more homes, 10 or more mobile homes, 10 or more apartment units, or 10 or more condominium units is a community water system unless information is available to indicate that 25 year-round residents will not be served. NR 809.04(6)(6) “Compliance cycle” means the 9-year calendar year cycle during which public water systems monitor. Each compliance cycle consists of 3, 3 year compliance periods. The first compliance cycle begins January 1, 1993 and ends December 31, 2001; the second begins January 1, 2002 and ends December 31, 2010; the third begins January 1, 2011 and ends December 31, 2019. NR 809.04(7)(7) “Compliance period” means a 3-year calendar year period within a compliance cycle. Each compliance cycle has 3, 3-year compliance periods. Within the first compliance cycle, the first compliance period runs from January 1, 1993 to December 31, 1995; the second from January 1, 1996 to December 31, 1998; the third from January 1, 1999 to December 31, 2001. NR 809.04(8)(8) “Comprehensive performance evaluation” or “CPE” means a thorough review and analysis of a treatment plant’s performance-based capabilities and associated administrative, operation and maintenance practices. It is conducted to identify factors that may be adversely impacting a plant’s capability to achieve compliance and emphasizes approaches that can be implemented without significant capital improvements. For purposes of compliance with this chapter, the comprehensive performance evaluation consists of at least the following components: Assessment of plant performance; evaluation of major unit processes; identification and prioritization of performance limiting factors; assessment of the applicability of comprehensive technical assistance; and preparation of a CPE report. NR 809.04(9)(9) “Confirmed presence” means the presence of coliform bacteria in a water sample confirmed by a total coliform-positive repeat sample. NR 809.04(10)(10) “Confluent growth” means a continuous bacterial growth covering the entire filtration area of a membrane filter, or a portion thereof, in which bacterial colonies are not discrete. NR 809.04(11)(11) “Consecutive System” means a public water system that receives some or all of its finished water from one or more wholesale systems through a master metering system. This public water system may also be known as a wholesale purchaser or wholesale customer. Delivery may be through a direct connection or through the distribution system of one or more consecutive systems. NR 809.04(12)(12) “Conventional filtration treatment” means a series of processes including coagulation, flocculation, sedimentation, and filtration resulting in substantial particulate removal. NR 809.04(13)(13) “Contaminant” means any physical, chemical, biological, or radiological substance or matter in water. NR 809.04(14)(14) “Corrosion inhibitor” means a substance capable of reducing the corrosivity of water toward metal plumbing materials, especially lead and copper, by forming a protective film on the interior surface of those materials. NR 809.04(15)(15) “CT” or “CTcalc” is the product of the residual disinfectant concentration (C) in mg/l determined before or at the first customer, and the corresponding disinfectant contact time (T) in minutes, i.e., “C” x “T”. If a public water system applies disinfectants at more than one point prior to the first customer, it shall determine the CT of each disinfectant sequence before or at the first customer, to determine the total percent inactivation or “total inactivation ratio.” The inactivation ratio for a single disinfectant sequence is: where “CTtable” is the CT value required for the target organism and the target level of inactivation as contained in ss. NR 810.47 to 810.61. The sum of the inactivation ratios, or total inactivation ratio for a series of disinfection sequences is: and is calculated by adding together the inactivation ratio for each disinfection sequence. In determining the total inactivation ratio, the water supplier determines the residual disinfectant concentration of each sequence and corresponding contact time before any subsequent disinfection application points. A total inactivation ratio equal to or greater than 1.0 is assumed to provide the target level of disinfection of the target organism.
NR 809.04(16)(16) “Department” means the department of natural resources. NR 809.04(17)(17) “Diatomaceous earth filtration” means a process resulting in substantial particulate removal in which: NR 809.04(17)(a)(a) A pre-coat cake of diatomaceous earth filter media is deposited on a support membrane (septum); and NR 809.04(17)(b)(b) While the water is filtered by passing through the cake on the septum, additional filter media known as body feed is continuously added to the feed water to maintain the permeability of the filter cake. NR 809.04(18)(18) “Direct filtration” means a series of processes including coagulation and filtration, but excluding sedimentation, resulting in substantial particulate removal. NR 809.04(19)(19) “Disinfectant contact time” (“T” in CT calculations) means the time in minutes that it takes for water to move from the point of disinfectant application or the previous point of disinfectant residual measurement to a point before or at the point where residual disinfectant concentration (“C”) is measured. Where only one “C” is measured, “T” is the time in minutes that it takes for water to move from the point of disinfectant application to a point before or where residual disinfectant concentration (“C”) is measured. Where more than one “C” is measured, “T” is: NR 809.04(19)(a)(a) For the first measurement of “C”, the time in minutes that it takes for water to move from the first or only point of disinfectant application to a point before or at the point where the first “C” is measured; and
