NR 810.02(10)
(10) “CT" or “CT calc" 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, for example, “C" x “T". If a public water system applies disinfectants at more than one point prior to the first customer, the water supplier 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 “CT
table" 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 shall determine 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 810.02(11)
(11) “Department" means the department of natural resources.
NR 810.02(12)
(12) “Diatomaceous earth filtration" means a process resulting in substantial particulate removal in which all of the following occurs:
NR 810.02(12)(a)
(a) A precoat cake of diatomaceous earth filter media is deposited on a support membrane or septum.
NR 810.02(12)(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 810.02(13)
(13) “Direct filtration" means a series of processes including coagulation and filtration but excluding sedimentation resulting in substantial particulate removal.
NR 810.02(14)
(14) “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.
NR 810.02(14)(a)
(a) 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.
NR 810.02(14)(b)
(b) Where more than one “C" is measured, “T" is determined as follows:
NR 810.02(14)(b)1.
1. For the first measurement of “C", “T" is 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.
NR 810.02(14)(b)2.
2. For subsequent measurements of “C", “T" is the time in minutes that it takes for water to move from the previous “C" measurement point to the “C" measurement point for which the particular “T" is being calculated.
NR 810.02(14)(c)
(c) Disinfectant contact time in pipelines shall be calculated based on “plug flow" by dividing the internal volume of the pipe by the maximum hourly flow rate through the pipe.
NR 810.02(14)(d)
(d) Disinfectant contact time within mixing basins and storage reservoirs shall be determined by tracer studies or other department approved equivalent demonstration.
NR 810.02(15)
(15) “Disinfection" means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents.
NR 810.02(16)
(16) “Disinfection profile" means a summary of daily
Giardia lamblia inactivation through the treatment plant. The procedure for developing a disinfection profile is contained in
s. NR 810.32.
NR 810.02(17)
(17) “Displacement zone" means the 3-dimensional subsurface region surrounding an aquifer storage recovery well into which treated drinking water is placed for storage and later recovery.
NR 810.02(18)
(18) “Distribution system" means all pipes or conduits by which water is delivered to consumers except piping and fixtures inside buildings served, water services and private water mains as defined in
ch. SPS 381.
NR 810.02(19)
(19) “Entry point" means a location in the water system after treatment or chemical addition, if any, but prior to the distribution system.
NR 810.02(20)
(20) “Filtered system" means a public water system that is required to use filtration to meet the basic filtration requirements of
s. NR 810.29.
NR 810.02(21)
(21) “Filter profile" means a graphical representation of individual filter performance, based on continuous turbidity measurements or total particle counts versus time for an entire filter run, from startup to backwash inclusively, that includes an assessment of filter performance while another filter is being backwashed.
NR 810.02(22)
(22) “Filtration" means a process for removing particulate matter from water by passage through porous media.
NR 810.02(23)
(23) “Groundwater" means any of the waters of the state, as defined in s.
281.01 (18), Stats., occurring in a saturated subsurface geological formation of rock or soil.
NR 810.02(24)
(24) “Groundwater source" means all groundwater obtained from horizontal collectors, infiltration lines, springs, and dug, drilled or other types of wells.
NR 810.02(25)
(25) “Groundwater under the direct influence of surface water" or “GWUDI" means any water beneath the surface of the ground with either:
NR 810.02(25)(a)
(a) Occurrence of insects or other macroorganisms, algae or large diameter pathogens such as
Giardia lamblia or
Cryptosporidium, in greater than or equal to 10% of representative source water samples collected over a period of 6 months, immediately prior to the first or only point of disinfectant application.
NR 810.02(25)(b)
(b) Evidence of relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity, or pH which closely correlate to climatological or surface water conditions where the department determines that these shifts are indications of the potential for contamination of the groundwater by the organisms identified in
par. (a).
NR 810.02(26)
(26) “Living unit" means a residence, apartment unit, condominium unit, duplex unit, manufactured home or other domicile.
NR 810.02(27)
(27) “Membrane filtration"
means a pressure or vacuum driven separation process in which particulate matter larger than one micrometer is rejected by an engineered barrier, primarily through a size-exclusion mechanism, and which has a measurable removal efficiency of a target organism that can be verified through the application of a direct integrity test. This definition includes the common membrane technologies of microfiltration, ultrafiltration, nanofiltration, and reverse osmosis.
NR 810.02(28)
(28) “Municipal water system" means a community water system owned by a city, village, county, town, town sanitary district, utility district, public inland lake and rehabilitation district, municipal water district or a federal, state, county or municipal owned institution for congregate care or correction, or a privately owned water utility serving the foregoing.
NR 810.02(29)
(29) “Non-community water system" means a public water system that is not a community water system. A non-community water system may be either a non-transient non-community water system or a transient non-community water system.
NR 810.02(30)
(30) “Non-transient non-community water system" or “NTNCWS" means a non-community water system that regularly serves at least 25 of the same persons over 6 months per year.
NR 810.02 Note
Note: Examples of non-transient non-community water systems include those serving schools, day care centers and factories.
NR 810.02(31)
(31) “NSF" or “NSF International" means the organization formerly known as the National Sanitation Foundation.
NR 810.02 Note
Note: The NSF or NSF International address is PO Box 130140, 789 N. Dixboro Road, Ann Arbor, Michigan 48113-0140.
NR 810.02(32)
(32) “Operator-in-charge" means the person designated by the owner of the waterworks to be in direct responsible charge of a subclass of operations of the waterworks. Not included in this definition are utility managers, city engineers, directors of public works or the equivalent, who are not actually involved in day-to-day operations.
NR 810.02(33)
(33) “Other-than-municipal water system" or “OTM" means a community water system that is not a municipal water system.
NR 810.02(34)
(34) “Person" means an individual, corporation, company, association, cooperative, trust, institution, partnership, state, municipality, or federal agency.
NR 810.02(35)
(35) “Public water system" or “system" or “PWS" means a system for the provision to the public of piped water for human consumption through pipes or other constructed conveyances, if the system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of the year. A public water system is either a “community water system" or a “non-community water system". A system:
NR 810.02(35)(a)
(a) Includes any collection, treatment, storage and distribution facilities under the control of the operator of a system and used primarily in connection with the system.
NR 810.02(35)(b)
(b) Includes any collection or pretreatment storage facilities not under the system's control which are used primarily in connection with the system.
NR 810.02 Note
Note: The definition of public water system as regulated by this chapter is broader and includes more water systems than those governed by the public service commission under its definition of a public utility in ch.
196, Stats.
NR 810.02(36)
(36) “Residual disinfectant concentration" (“C" in CT calculations) means the concentration of disinfectant measured in mg/l in a representative sample of water.
NR 810.02(38)
(38) “SCADA" means Supervisory Control and Data Acquisition, a computer system used for gathering and analyzing real time data used to monitor and control water systems and their components.
NR 810.02(39)
(39) “Slow sand filtration" means a process involving passage of raw water through a bed of sand at low velocity, generally less than 0.4 m/h, resulting in substantial particulate removal by physical and biological mechanisms.
NR 810.02(40)
(40) “Surface water" means all water which is open to the atmosphere and subject to surface runoff.
NR 810.02(41)
(41) “Surface water systems" means public water systems using surface water or groundwater under the direct influence of surface water as a source and that are subject to the requirements of
40 CFR 141, subpart H, P, and W, which contains the national primary drinking water regulations.
NR 810.02(42)
(42) “Transient non-community water system" or “TNCWS" means a non-community water system that serves at least 25 people at least 60 days of the year
but does not regularly serve at least 25 of the same persons over 6 months per year
.
NR 810.02 Note
Note: Examples of transient non-community water systems include those serving taverns, motels, restaurants, churches, campgrounds and parks.
NR 810.02(43)
(43) “Unfiltered system" means a public water system using groundwater under the direct influence of surface water that is not a filtered system.
NR 810.02(44)
(44) “Utility" means a public utility as defined in
ch. 196, Stats.
NR 810.02(46)
(46) “Virus" means a virus of fecal origin which is infectious to humans by waterborne transmission.
NR 810.02(47)
(47) “Water storage facilities" means vented reservoirs, water towers, standpipes and treatment plant basins including ground and elevated storage structures. It does not include hydropneumatic tanks or natural surface water bodies.
NR 810.02(48)
(48) “Water supplier" means any person who owns or operates a public water system.
NR 810.02(49)
(49) “Waterworks" or “water system" means all facilities, structures, pipes, conduits and appurtenances by means of which water is delivered to consumers except piping and fixtures inside buildings served, water services and private water mains as defined in
ch. SPS 381.
NR 810.02(50)
(50) “Well" means an excavation or opening into the ground made by digging, boring, drilling, driving or other methods for the purpose of obtaining groundwater.
NR 810.02(51)
(51) “Well driller" means a person defined as a well driller by s.
280.01 (2m), Stats.
NR 810.02(52)
(52) “Wholesale" or “wholesaler system" means a public water system that treats source water as necessary to produce finished water and then delivers some or all of that finished water to another public water system through one or more master meters. Delivery may be through a direct connection or through the distribution system of one or more consecutive systems.
NR 810.02(53)
(53) “WPDES permit" means the Wisconsin pollutant discharge elimination system permit issued by the department under
ch. 283, Stats., for the discharge of pollutants.
NR 810.02 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10; correction in (51) made under s.
13.92 (4) (b) 7., Stats.,
Register November 2010 No. 659;
correction in (18) and (49) made under s. 13.92 (4) (b) 7., Stats., Register January 2012 No. 673.
NR 810.03
NR 810.03 General operational requirements. The water supplier shall be responsible for ensuring that the public water system is operated and maintained to provide an adequate quantity of safe drinking water to those consumers served by the supplier. This responsibility includes maintaining or contracting for an adequate number of trained staff to perform all duties necessary, performing maintenance and replacement of equipment when necessary to keep the facilities in good operating condition, and providing adequate laboratory testing equipment to control and monitor treatment processes and chemical addition programs. All water suppliers for community systems shall operate the public water system within the design parameters of
ch. NR 811 and all parameters of the specific plan approvals for that system. This responsibility also includes ensuring that sufficient fiscal resources are available for adequate operation and maintenance.
NR 810.03 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 810.04
NR 810.04 Certified operator requirement. The water supplier shall provide certified operators as follows:
NR 810.04(4)
(4) Transient non-community water systems are exempted from certified operator requirements.
NR 810.04(5)
(5) The department shall be notified within 30 days when the water supplier has employed a new operator-in-charge for each subclass. The operator's name, contact information, and certification number shall be sent to the department after being hired.
NR 810.04 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 810.05
NR 810.05 Required sampling and testing. The water supplier shall be responsible for sampling, testing and reporting treatment plant and distribution system water quality information to the department, in accordance with the applicable requirements of this chapter and
chs. NR 108,
140,
149,
809, and
811. The department may require the installation of sample hydrants if sufficient, representative sample locations are not reasonably accessible in the distribution system.
NR 810.05 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 810.06
NR 810.06 Operational sampling. Sampling and testing, in addition to the required sampling and testing required in
s. NR 810.05, shall be performed by the water supplier as required by the department in writing. The department may require additional sampling and testing when necessary to verify water quantity and quality, treatment plant effectiveness, adequate distribution system operation, and to protect water consumers.
NR 810.06 History
History: CR 09-073: cr.
Register November 2010 No. 659, eff. 12-1-10.
NR 810.07(1)
(1) Water suppliers for the following public water systems shall submit monthly reports in a form or format as required by the department to the appropriate regional office of the department:
NR 810.07(1)(b)
(b) Other-than-municipal water systems which have chemical or physical treatment.
NR 810.07(1)(c)
(c) Any public water system with a pumping capacity of 70 gpm or more.
NR 810.07(1)(d)
(d) Any other public water system as required by the department.
NR 810.07(2)
(2) Reports shall include all the following data, if applicable:
