NR 812.39(2) (2)Recording total water usage. The department may require the installation and calibration of means for the recording of total water usage from a high capacity well and may require the operator to the well to submit monthly reports of this information.
NR 812.39 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91.
NR 812.40 NR 812.40Above ground pumphouses. When a structure is constructed to house a well, pump, pressure tank, other appurtenances or any combination thereof, the structure shall be weather- and frost-proof, if needed. Above ground pumphouses shall be constructed with the following minimum features:
NR 812.40(1) (1) When a poured-concrete floor is provided, the top of the floor shall be at least 4 inches above the established ground grade and sloped toward the drain or door, or away from the well. A watertight bond shall be provided between the well casing pipe and the concrete;
NR 812.40(2) (2) A door opening outward when the structure is large enough, or a trapped floor drain discharging to the ground surface at least 8 feet from the well when a door is not installed;
NR 812.40(3) (3) Protection from freezing for the well, pressure tank and piping, if needed;
NR 812.40(4) (4) Hinged roof or removable hatch over the well or some provision for pulling the pump; and
NR 812.40(5) (5) The structure may not be used for storage materials that could contaminate the well.
NR 812.40 Note Note: Dimensions, insulated walls and roof and actual details of wall and roof design are optional. See figure 46.
NR 812.40 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (intro.), Register, September, 1994, No. 465, eff. 10-1-94.
NR 812.41 NR 812.41Disinfection, flushing and sampling.
NR 812.41(1)(1)Disinfection. When a potable well is entered for the purpose of installing, replacing or repairing equipment located within the well, the well and discharge piping shall be thoroughly disinfected by the pump installer or by the person who installed the pump using sodium hypochlorite or calcium hypochlorite. Chlorine compounds having additives may not be used.
NR 812.41(1)(a) (a) The disinfectant shall be dispersed throughout the entire water column and in the water system.
NR 812.41(1)(b) (b) A chlorine solution with a minimum of 100 mg/l of chlorine shall be used to disinfect wells and water systems.
NR 812.41(1)(c) (c) The disinfectant solution shall be prepared according to s. NR 812.22 (4) and shall remain in the system at least 8 hours, except for emergency situations when water is needed without delay. A contact time of at least 30 minutes shall be provided for emergency situations.
NR 812.41(2) (2)Flushing. The pump installer or his or her agent shall thoroughly flush the system of chlorine after disinfecting and before the pump is placed in normal service.
NR 812.41(3) (3)Sampling for coliform bacteria, nitrate, and arsenic.
NR 812.41(3)(a)(a) For potable wells, the pump installer or his or her agent or the owner shall collect a water sample to be analyzed for coliform bacteria no later than 30 days following completion of the original pump installation and before the system is placed into service. Water samples shall also be collected and analyzed for coliform bacteria, nitrate and arsenic no later than 30 days after the well is entered for the purpose of measuring or diagnosing any feature or problem within the well or after the well is entered for rehabilitation, redevelopment, reconditioning, or cleaning or if the well is entered for the purpose of installing, replacing, or repairing equipment located within the well or when the casing height is raised. If the pump installer uses the well owner as the agent to collect the water samples, the pump installer shall provide the owner with laboratory designated sample bottles and department specified forms. Regardless of whom the pump installer designates to collect and submit the samples for analysis, the responsibility to ensure these tasks are completed belongs to the pump installer. Water samples shall be collected no later than 30 days after completion of the work. If the installation is completed at a time when the sample will be received at a certified laboratory later than 48 hours after the sample was collected, the sample may instead be collected no later than 30 days after the well is placed in service. If the laboratory test report indicates that any test result is invalid for any reason, including improper sample bottle, improper collection technique, or longer than 48 hours between sample collection and arrival at the laboratory, the pump installer is required to collect replacement samples no later than 30 days of receiving the invalid test report(s).
NR 812.41(3)(b) (b) Water samples for coliform bacteria analysis shall be analyzed by a laboratory certified by DATCP under ch. ATCP 77 to perform coliform bacteriological examination of drinking water provided the laboratory has an agreement with the department for electronic submission of laboratory test reports to the department no later than 30 days after completion of each analysis or be analyzed by the Wisconsin state laboratory of hygiene.
NR 812.41(3)(c) (c) Water samples for nitrate analysis shall be analyzed by a laboratory certified by the department under ch. NR 149, to perform nitrate analysis of drinking water provided the laboratory has an agreement with the department for electronic submission of laboratory test reports to the department no later than 30 days after completion of each analysis, or be analyzed by the Wisconsin state laboratory of hygiene.
NR 812.41(3)(d) (d) Water samples for arsenic analysis shall be analyzed by a laboratory certified by the department under ch. NR 149, to perform arsenic analysis of drinking water provided the laboratory has an agreement with the department for electronic submission of laboratory test reports to the department no later than 30 days after completion of each analysis, or be analyzed by the Wisconsin state laboratory of hygiene.
NR 812.41 Note Note: In some instances arsenic test results may be temporarily high due to turbidity increases caused by changing a pump or by chlorination following work involving entry into the well. Before pursuing remedial reaction, the well owner is advised to collect a second water sample at least 30 days after the first sample.
NR 812.41(3)(e) (e) The certified laboratory and pump installer shall use forms specified by the department. The pump installer shall provide the well owner with a copy of the laboratory test reports no later than 10 days after the pump installer's receipt of the reports.
NR 812.41(4) (4)Well casing pipe depth verification. When required to measure well casing pipe depth, due to lack of a confirmable well construction report, the pump installer shall enter the well details, including location, well casing pipe depth, total well depth, distances to possible contaminant sources and well owner information on a form specified by the department and shall submit the report to the department no later than 30 days after performing the verification. A copy of the report shall also be provided to the well owner no later than 30 days after performing of the verification.
NR 812.41 History History: Cr. Register, January, 1991, No. 421, eff. 2-1-91; am. (1) (intro.), (3) (a), (c), Register, September, 1994, No. 465, eff. 10-1-94; CR 13-099: r. and recr. (3), cr. (4) Register September 2014 No. 705, eff. 10-1-14.
subch. IV of ch. NR 812 Subchapter IV — Standards for Existing Installations
NR 812.42 NR 812.42Criteria for evaluation.
NR 812.42(1) (1)Location, well construction, pump installation, water quality, and sanitary condition. Each existing water system shall be viewed as an individual unit and its acceptability for use as a source of water shall be determined on the basis of its location, construction, pump installation, pump discharge piping arrangement, water quality, and sanitary condition. Existing installations shall be evaluated according to and shall comply with the requirements in effect at the time they were constructed or installed, or if constructed or installed prior to April 10, 1953, with the standards adopted on that date, except that installations shall meet the further well location, well construction, pump and pump discharge, water quality, pit, reservoir and dug well requirements of this section. The owner shall provide written documentation verifying the date of construction or installation or both. Water systems constructed or installed on or after February 1, 1991 shall meet the requirements of Subchapters I through III. Water systems constructed or installed prior to February 1, 1991 shall meet the requirements of this subchapter. Water systems having features not meeting the requirements of this section or the code in effect at the time of construction or installation if installed after April 10, 1953, shall be upgraded as specified in sub. (11) and s. NR 812.04 (2) according to requirements for new construction or installation, or shall be filled and sealed according to the criteria and requirements of s. NR 812.26. The department may deny approval for operation of an existing well requiring approval under s. NR 812.09 (4), if the well does not meet the construction requirements of this chapter for new wells:
NR 812.42(1)(a) (a) Location. The well location shall conform to the requirements in effect at the time the well was constructed, or to the location requirements of s. NR 812.08. However, if a contamination source was installed after the well was constructed, the well location shall conform to the requirements in effect at the time of installation of the contamination source. If the well was constructed prior to April 10, 1953, it shall meet the separation distance requirements established on April 10, 1953, except those separation distance requirements that are no longer in effect. If a separation distance requirement is less in the current code than it was in the April 10, 1953 code, the lesser separation distance requirement applies. A well which meets the location requirements in effect at the time of construction, but does not meet the current location requirements of s. NR 812.08 may only be reconstructed with prior department approval.
NR 812.42(1)(b) (b) Well construction.
NR 812.42(1)(b)1.1. The well construction shall be in compliance with the construction requirements in effect at the time the well was constructed or shall be in compliance with the standards of ss. NR 812.09 to 812.15, except if the well was constructed prior to April 10, 1953, in which case the well construction shall be in compliance with the standards adopted on April 10, 1953. A well constructed in violation of the requirements in effect at the time of construction, or a well constructed to meet the requirements in effect at the time of construction but not according to the construction requirements of ss. NR 812.09 to 812.15, may only be reconstructed with prior department approval.
NR 812.42(1)(b)2. 2. The well casing pipe shall meet the minimum wall thickness requirements of s. NR 812.17 Table V for its diameter and may not be in a deteriorated condition.
NR 812.42(1)(b)3. 3. If the minimum well construction requirements of this paragraph are not met, the well shall be filled and sealed in accordance with s. NR 812.26. For wells in basements or walkout basements, the well casing pipe depth shall be measured from the floor of the basement.
NR 812.42(1)(b)4. 4. Except for where additional well casing pipe depth has been required for a variance or a special well casing depth area, unconsolidated formation wells, including both drilled and driven-point wells, shall have minimum well casing pipe depth settings of at least 25 feet below the ground surface, not including the screen; or, if the static water level is deeper than 15 feet, shall have minimum well casing pipe depth setting at least 10 feet below the static water level.
NR 812.42(1)(b)5. 5. Except for where additional well casing pipe depth has been required for a variance or a special well casing depth area, bedrock wells shall have minimum well casing pipe depth settings below the ground surface as follows:
NR 812.42(1)(b)5.a. a. Twenty-five feet for wells terminating in sandstone, constructed before February 1, 1991; and 30 feet for wells terminating in sandstone, constructed on or after February 1, 1991.
NR 812.42(1)(b)5.b. b. Forty feet for wells terminating in limestone or dolomite.
NR 812.42(1)(b)5.c. c. Forty feet for wells terminating in bedrock other than sandstone, limestone or dolomite.
NR 812.42(1)(b)5.d. d. Sixty feet for wells terminating in limestone or dolomite, when the depth to bedrock is less than ten feet below the ground surface and the well was constructed on or after February 1, 1991.
NR 812.42(1)(c) (c) Water quality. A well should produce bacteriologically safe water and produce water free from contaminant levels in exceedence of the drinking water standards of s. NR 812.06. If a well does not produce bacteriologically safe water or produces water containing contaminant levels in exceedence of the drinking water standards of s. NR 812.06 the department may require the water system to be upgraded to meet the requirements of this chapter or may require the well to be filled and sealed according to the criteria and requirements of s. NR 812.26.
NR 812.42(2) (2)Pits and subsurface pumprooms (alcoves). Existing pits used only for the housing of valves are exempt from the requirements of this section except that a pit used for this purpose shall be watertight, may not be connected to a sewer, shall be drained to permeable soil or to the ground surface, and may not be subject to flooding. Existing well or pressure tank pits, alcoves and subsurface pumprooms constructed after April 10, 1953 shall comply with the minimum requirements of s. NR 812.36 (2). When a well in a free-standing pit is filled and sealed, the pit shall be filled in accordance with s. NR 812.26 (7) (a) 5.unless the pit is a complying valve pit. When a well in a free-standing pit is extended above grade, the pit shall be filled in accordance with s. NR 812.26 (7) (a) 5.unless the pit is a complying valve pit. Pits and alcoves constructed on or before April 10, 1953 shall meet the following minimum requirements:
NR 812.42(2)(a) (a) Construction. The entire pit or subsurface pumproom structure, including the roof, shall be constructed of reinforced watertight poured concrete. If the pit or a subsurface pumproom pit connected to a basement (alcove) has a history of being continuously dry, walls of concrete block, brick, or stone with mortared joints may be accepted. The walls, floor and roof shall be crack-free and watertight. The junction of walls and floors and all openings in the structure shall be sealed watertight. The roof or deck shall be at or above the ground surface. Requirements for existing pits are depicted in figures 47 and 48.
NR 812.42(2)(b) (b) Access. The pit shall be provided with a manhole opening, having a raised curbing edge at least 4 inches higher than the pit roof. A structurally substantial, waterproof, overlapping, tight-fitting cover with skirted sides shall be provided for the manhole. A watertight, cast-iron manhole frame and cover bolted in place with a gasket may be substituted for a curbed manhole. A subsurface pumproom pit adjoining a basement or a pit not having the manhole centered over the well may have a section of well casing pipe installed directly above the well. This pipe shall be equal in size or larger than the well casing pipe and it shall be sealed with an approved well seal or cap.
NR 812.42(2)(c) (c) Drainage. The department recommends that a pit be drained by a separate, metal, gravity drain discharging to the ground surface or to a subsurface pocket of permeable sand or gravel. The drain pipe shall be watertight. If there is a backflow or seepage from the drain into the pit at any time, the drain shall be sealed. When a drain is not installed, the department recommends that the pit have a watertight sump. A subsurface pumproom (alcove) adjoining a basement may be drained to the basement if the basement is adequately drained. If the basement is not adequately drained, concrete shall be poured in the alcove so that the alcove floor is increased in height to one foot above the basement floor and if the well casing height no longer complies with par. (d), it shall be extended in accordance with par. (d) 1. d. Well subsurface pumproom (alcoves) adjoining basements where the basement is subject to flooding shall be discontinued for use as a well pit and the well shall be filled and sealed according to s. NR 812.26. The subsurface pumproom (alcove) need not be filled and sealed. Pit or alcove drains or sump pump discharge pipes may not be directly connected to a sewer or other plumbing system. If discharging to the ground surface, the end of the surface discharge pipe shall be screened.
- See PDF for diagram PDFFigure 46. Pumphouse specifications.
- See PDF for diagram PDFFigure 47. Minimum requirements for existing well pits.
NR 812.42(2)(d) (d) Well height. The well casing pipe shall terminate at least 6 inches above the floor of a pit or a subsurface pumproom pit (alcove) connected to a basement and shall be provided with an approved sanitary well seal.
NR 812.42(2)(d)1. 1. If the well casing pipe does not extend at least 6 inches above the floor, the pit or alcove may remain in service only if all of the following apply:
NR 812.42(2)(d)1.a. a. The well location meets the minimum standards of sub. (1) (a).
NR 812.42(2)(d)1.b. b. The well construction meets the minimum standards of sub. (1) (b), verified by measuring the well casing pipe depth in accordance with sub. (7) (c) 3., if no confirmable well construction report can be found for the well. Well details, including location, well casing pipe depth, total well depth, distances to possible contaminant sources and well owner information shall be entered on a form and submitted to the department in accordance with s. NR 812.22 (10) or 812.41 (4).
NR 812.42(2)(d)1.c. c. The pit or alcove structure meets the requirements of this section.
NR 812.42(2)(d)1.d. d. The well casing pipe is extended up and out of the pit or alcove to 12 inches above the outside grade in accordance with sub. (12). For situations where the well would create an obstruction, including in a stoop, sidewalk, breezeway, driveway, garage or patio, making it impractical to raise the well casing pipe up and out of the alcove, the well casing pipe may be raised to a height just below the ceiling of the alcove structure in accordance with sub. (12).
NR 812.42(2)(d)2. 2. If the pit is a subsurface pumproom (alcove) connected to a basement and the alcove floor is lower than the basement floor, the floor shall be raised to a height at least even with the basement floor by pouring concrete.
NR 812.42(2)(d)3. 3. If the newly-poured alcove floor results in the well casing pipe terminating less than 6 inches above the floor, then the well casing pipe shall be extended as specified in sub. (2) (d) 1. d and in accordance with sub. (12). If the well casing pipe is extended or the floor is raised, a four-inch high, two-inch thick concrete collar shall be placed around the well casing pipe just above where it extends out of the floor.
NR 812.42(2)(e) (e) Pit venting. Well pit vent pipes, if used, shall be located in opposite corners. One pipe shall extend to within one foot of the pit floor and the other extend only down through the pit roof. The upper end of each vent pipe shall extend watertight through the pit roof and terminate with a reverse bend and screened outlet.
NR 812.42 Note Note: Approval has been required to construct a pit since April 10, 1953.
NR 812.42(3) (3)Noncomplying pits.
NR 812.42(3)(a)(a) Noncomplying freestanding pit structures. When the free-standing pit structure does not meet the minimum construction requirements of sub. (2) or when water gains access to a pit through the floor or walls, the floor and at least one wall of the pit shall be perforated and the pit shall be filled after properly extending the well casing pipe above grade in accordance with sub. (12) or after properly filling and sealing the existing well according to s. NR 812.26. Before the pit is filled, all water system features, including but not limited to, the pressure tank, pump, discharge piping, electrical wiring and conduit, and any treatment equipment shall be removed from the pit.
NR 812.42(3)(b) (b) Noncomplying subsurface pumprooms (Alcoves). If the pit is a subsurface pumproom (alcove) connected to a basement, the pit need not be filled, except when the alcove floor is lower than the basement floor, in which case the floor shall be raised to a height at least even with the basement floor by pouring concrete. To allow for easy removal of the pump for servicing or replacement, this casing extension may be made with the use of a threaded and coupled joint. If the well casing pipe is extended or the floor of the alcove is raised, a four-inch high, two-inch thick concrete collar shall be placed around the well casing pipe just above where it extends out of the floor.
NR 812.42(3)(c) (c) Other modifications to pit or alcove. Any other modifications to the pit or alcove allowed by the department shall be made in a manner to meet the requirements for pits in s. NR 812.36.
NR 812.42(4) (4)Reservoirs.
NR 812.42(4)(a)(a) An existing reservoir shall be constructed of steel or reinforced concrete. If constructed with concrete, the roof shall be watertight, reinforced, poured concrete having a thickness of at least 5 inches. The walls and floor of the reservoir shall be watertight and constructed of reinforced, poured concrete or equivalent watertight construction.
NR 812.42(4)(b) (b) The manhole curbing shall extend at least 12 inches above the established ground grade. If the reservoir roof terminates above the established ground grade, the curbing shall terminate at least 6 inches above the reservoir roof. The manhole shall be provided with a waterproof, tight-fitting, overlapping metal cover with skirted sides.
NR 812.42(4)(c) (c) A reservoir overflow pipe shall be installed watertight just under the roof of the reservoir and entirely above the established ground grade. It shall terminate at a point at least 12 inches above the established ground grade with a screened, downturned elbow. If an existing overflow pipe is totally buried between the reservoir and its outlet, it shall be eliminated by properly sealing the pipe with concrete at the reservoir.
NR 812.42(4)(d) (d) A gravity discharge pipe to the reservoir shall extend entirely above established ground grade and through the roof of the reservoir or manhole curbing. Service pipe connections shall be sealed watertight. A pressurized service pipe may be connected to the reservoir below ground grade provided it is under a continuous pressure which is greater than the ground surface elevation.
NR 812.42(4)(e) (e) The reservoir shall meet the location requirements listed in Table A in effect at the time of its construction.
NR 812.42(4)(f) (f) When a below ground-grade reservoir or a buried pressure tank pit is to be abandoned, it shall be permanently filled and sealed when the well or drillhole is filled and sealed. The reservoir shall be filled according to the filling and sealing requirements of s. NR 812.26 (7) (a) 5. for well pits.
NR 812.42(4)(g) (g) The owner shall permanently eliminate, by filling and sealing, a reservoir if any of the following apply:
NR 812.42(4)(g)1. 1. The location or construction of the reservoir does not meet the requirements of this chapter.
NR 812.42(4)(g)2. 2. It poses a hazard to health or safety.
NR 812.42(4)(g)3. 3. It has been taken out of service or has not been used for 2 or more years.
NR 812.42(4)(h) (h) A reservoir shall be maintained in a clean and sanitary condition and provide water free of bacterial and chemical contamination.
NR 812.42(5) (5)Dug wells. An existing dug well may be continued in service only if it continuously produces water bacteriologically safe and containing contaminant levels below the drinking water standards of s. NR 812.06. Use of dug wells is not recommended by the department. A dug well may not be reconstructed without approval. Existing dug wells shall meet the following minimum construction requirements:
NR 812.42(5)(a) (a) Curbing. The curbing of every dug well shall be of watertight reinforced poured concrete or at least 3/16 inch thick steel curbing with watertight joints. Fieldstone curbing may not be used. The curbing shall extend above grade at least 8 inches and be protected from flooding. An open annular space may not exist around the dug well curbing.
- See PDF for diagram PDFFigure 48. Requirements for an existing pit connected to a basement (subsurface pumproom).
NR 812.42(5)(b) (b) Depth. If the well was dug after June, 1975, the watertight curbing shall extend to a depth of at least 25 feet below ground surface and the well shall produce bacteriologically safe water. If the well was dug prior to June, 1975, the watertight curbing shall extend to at least the 15-foot depth and the well shall produce bacteriologically safe water.
NR 812.42(5)(c) (c) Cover. The dug well cover shall be of watertight, reinforced concrete at least 5 inches thick and wide enough to overlap the curbing by at least 2 inches. It shall provide a tight seal and be free of joints. A steel well casing pipe sleeve meeting the requirement for potable well casing pipe in s. NR 812.17 shall extend watertight through the cover to provide access for installing the pump. The steel well casing pipe sleeve shall extend at least 8 inches above the cover and have a watertight seal.
NR 812.42(5)(d) (d) Equipment location. Pumping equipment or attachments may not be installed for a dug well so that access to the interior of the well will be required for maintenance or repair.
NR 812.42(6) (6)Pump and pump discharge installations. Pump installations installed prior to February 1, 1991 shall conform to the following requirements:
NR 812.42(6)(a) (a) Installations for water supplies serving a maximum total of 3 families in residential units shall meet the following requirements:
NR 812.42(6)(a)1. 1. The subsurface connection to the well casing pipe may be made with an approved weld-on pitless adapter or with an approved pitless unit providing the adapter or unit is installed according to the requirements of s. NR 812.31 (1), (2) (a), (3) and (4).
NR 812.42(6)(a)2.a.a. Any buried suction pipe shall be contained in a sealed pressurized conduit or, a nonpressurized conduit, if the nonpressure conduit was installed before February 1, 1991. The nonpressure conduit shall meet the pipe requirements of Table V between the connection to the well casing pipe and a basement, or shall be properly connected to the well with an approved pitless adapter or pitless unit designed for and used with a concentric piping arrangement. Unprotected buried suction lines not enclosed in conduit may not be used.
NR 812.42 Note Note: Unprotected buried suction lines have never been allowed by the Wisconsin Well and Pump Code. Nonpressurized conduits were only allowed prior to February 1, 1991.
NR 812.42(6)(a)2.b. b. Nonpressure conduit shall have been welded watertight or threaded watertight to the well casing pipe and shall be at least 4 inches in diameter and shall enter the basement such that the bottom of the conduit is at least 6 inches above the basement floor.
NR 812.42 Note Note: Nonpressure conduits to protect buried suction lines were only allowed before February 1, 1991 and then only for installations serving three or fewer homes.
NR 812.42(6)(a)2.c. c. A nonpressure conduit may extend at an angle up through a basement floor, or up through a concrete slab floor of a building having no basement, provided the lowest end of the conduit extends to a height at least 6 inches above the floor.
NR 812.42 Note Note: The department recommends that the pump impeller or cylinder of pump units be located in basements not subject to flooding and be at least one foot above the floor. See figures 49 and 50 for nonpressure conduit installations.
NR 812.42(6)(a)3. 3. Buried submersible pump discharge pipes connected to pitless adapters or pitless units shall conform to the specifications in s. NR 812.17 for steel pipe or shall conform to the requirements in the “Pipe and Tubing for water services and private water mains" table in ch. SPS 384. This pipe shall be maintained under system pressure at all times. No check valve may be placed in the pump discharge line between a pitless adapter or unit and a pressure tank or other pressure vessel. The check valve shall be located either at the top of the submersible pump, in that portion of the discharge pipe within the well or on the spool of an approved spool-type pitless unit.
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.