State Well Codes

Casing to extend at least 12 in. above ground surface, and surface must drain away from the well.

All wells to have annular surface seal of grout to not less than 20 ft below ground surface of to useable water below ground surface. Must fully surround outermost casing, be evenly distributed, and free of voids.

All plumbing or water supply distribution from the well to the point of entry hookup shall be installed and maintained in accordance with existing plumbing codes.

Flow meters w/instantaneous flow rate and totalizing capability shall be installed on discharge lines of all water wells or well systems whenever the State Engineer permit conditions require a flow meter and subsequent reporting of volumetric use.

50 ft.

50 ft.

10 ft., if overhead structure is utility line, adhere to OSHA standards.

Wells to be disinfected following construction, repair, or work done on pump according to Dept. of Health & Social Services. Ensure chlorine residual of 100 mg/l is in the entire volume of water in the casing and all parts of the plumbing system (pump, drop-pipe, wiring, pitless assembly, etc.) for a minimum contact period of not less than two (2) hours (overnight is preferable) before flushing and ridding the chlorine solution from the well.

Casing to extend to water table or below.

Shall be capped or sealed to prevent contamination. Flowing wells are to be capped (valved) to stop the flow of water when well not in use.

Cased well to have cement or concrete plug placed opposite to all perforations or screens. Concrete or cement plug to extend to at least 10 ft. above cavernous zone & 10 ft. below cavernous zone or well bottom. Creviced rock to be filled w/ concrete or cement grout, or alternate layers of cement grout & gravel or stone aggregate. Gravel packed well to be pressure grouted entire perforated or screened section of casing. Remainder of well to be filled w/ grout, cement or concrete grout, drilling mud, or bentonite. Artesian well to have cement or concrete plug seal the artesian aquifer and extend to at least 10 ft. above artesian zone and 10 ft. below artesian zone or well bottom. If necessary, to stop surface flow or subsurface leakage, pressure grout the entire zone. Remainder of well to be filled w/grout, cement or concrete grout, drilling mud, or bentonite. Temporarily abandoned wells to be sealed w/ watertight cap or seal. Uncased well to be filled w/ grout, cement or concrete grout, drilling mud, or bentonite. Well in consolidated formation to be filled w/ grout, cement or concrete grout, drilling mud, or bentonite.

Casing to terminate min of 12 in. above ground surface.

Plastic screens to shall comply with ANSI/NSF Standard 61. Other than commercially manufactured screens can be constructed by created slots in approved casing material. Size of openings based on sieve analysis of formation or gravel pack, sufficient length and diameter to provide adequate specific capacity and low aperture entrance velocity.

All conduits, valves, piping, other plumbing fixtures and fittings should be NSF approved and suitable for potable water. Water service pipe from well to point of entrance to building shall comply w/applicable standards and carry the NSF Potable Water seal. Water service piping shall be installed below the anticipated frost line, with a minimum depth of two (2) feet.

Permit to drill, construct, alter, or abandon well needed prior to action.

All materials used in replacement, alteration or repair of any water well shall meet or exceed the requirements for new installation. Repairs or retrofits or both to wells w/top of casing terminating below ground shall extend the casing above land surface with like material.

50 ft. or 100 ft. when well is at lower elevation than contaminant.

50 ft. or 100 ft. when well is at lower elevation than contaminant.

50 ft. or 100 ft. when well is at lower elevation than contaminant.

Wells to be located as far as possible from potential contaminants, and to be located to be accessible for cleaning, treatment, repair, testing, abandonment, and other maintenance. If located in areas of seasonable flooding or surface water contamination shall be constructed so as to prevent this water from entering the well.

Certified water well driller to be on site during drilling, construction, altering, or abandoning well. To have min of 2 yr. experience.

Immediately before casing is placed in consolidated formations, 1 bag of cement to be mixed w/ 5-7 gal of water & placed. Shall be neat cement, bentonite w/cement mix, or bentonite. Other materials require Commissioner approval. No drilling muds shall be used for grouting.

Develop to remove native silts & clays, drilling mud, or finer fraction of gravel pack.

WSC approved vector proof cap and shall provide for ventilation.

Must meet approval.

Screened downward facing vent to be provided for well cap or seal. Vent pipe toe provide for at least 0.25 square inches of open area.

A continuous-slot screen composed of stainless steel, everdur, monel, brass or approved polyvinyl chloride (PVC). Noncontinuous-slot screens may be used if approved. Screen selection for driven-point wells is optional, except that screens having any lead content may not be used. For nonpotable low capacity wells and dewatering wells, screens are not required. May be permanently welded or threaded. Riser may be installed to extend upward from top of screen. Riser pipe material may be thermoplastic or metal, but not metal w/lead content >8%.

Pump installers to have valid Wisconsin license. The pump intake shall be set at least 5 feet above the bottom of the well casing pipe and shall be set such that the pump does not break suction under normal operating conditions.

I.D. to be no < I.D. of casing. Lead-based solder not to be used. Plastic pipe not to be used for buried pipe in soils contaminated w/ volatile organic chemicals. Subsurface connection to be made of weld-on, clamp-on, or bolt-on adapter or unit. To be used for making subsurface connections to wells. Type M copper pipe not to be used.

100 ft.

100 ft.

100 ft.

250 ft.

50 ft., including existing, replacement, abandoned POWTS w/in 3 yrs of abandonment.

100 ft., including water-tight storage trench or pit.

100 ft., liquid-tight

50 ft. w/ > 4 Units or > 6 in. diameter

25 ft. provided that the pipe meets ASTM specification D-2241, with standard dimension ratio of 21 or less or pressure pipe meeting the requirements of s. NR 110.13 or 811.62; 50 ft if pipe does not meet these requirements.

250 ft.

25 ft.

50 ft.

8 ft.

250 ft.

8 ft.

250 ft.

250 ft.

Well & its surroundings to be kept in sanitary conditions. To be as far away from any potential contamination source as general layout of premises and surroundings allow. Any potential contaminant not assigned a setback requirement must be a minimum of 8 ft from well.

100 ft.

25 ft.

25 ft.