New-State Well Codes

"All individual residential wells wells shall be disinfected upon well completion, initial installation of pump and sanitary cover. The well shall also be disinfected upon any well subsequent maintenance, repair, pump repair, pump installation, or testing. Disinfectants shall be placed in the well in order to provide a chlorine residual from 50 ppm to 250 ppm for a minimum of 4 hours before being flushed from the well. The method of chlorination shall be one that insures that the chlorine is uniformly distributed in the well. The well shall be flushed sufficiently after disinfection to remove the disinfectant and to condition the well for use."

"Certain conditions may require increased distances of certain wells from potential contamination sources or known contamination and the decision shall be made in consultation with the Department. These include but are not limited to:
a. Type I and IV wells with less than twenty feet of casing
b. Type I wells where fractured rock is at the surface
c. Type II or III wells with no confining layers between the screened zone(s) and the ground surface
d. Type IV wells where no confining layers overlie the open-hole limestone or the limestone is at shallow depth
e. Type V wells because they are under water-table conditions"

"If well is uncontaminated and not in alluvium or terrace deposits authorized by the Board, fill well with uncontaminated, compacted drill cuttings and/or uncontaminated surface clay, cement, bentonite pellets or granules, or high solids (min. 20% solids by dry wt) bentonite grout to w/in 14 ft of land surface, and min. of 10 ft of annular space and interior of casing shall be filled w/cement grout to at least 4 ft below land surface. Top of casing to be properly sealed w/ pitless adapter cap, sanitary well seal, or cap if
temporarily abandoned"

(fields, beds, drywells, injection wells, etc.) 100 ft.

>10 ft.

>200 ft.

>50 ft.

≤ 10 inch diam. - ASTM schedule 40, > 10 inch diam. - 0.375 inch minimum wall thickness

1 bag of cement & = amount of dry sand, gravel, & clean water Aggregate to be no > than 1/5 of dimension between outside casing and face of bore hole. Concrete can be used in top 10 ft. of annular space in large diameter wells if space is > 2 in. from wall.

1 bag to 6 gal. water

1 part sand 1 part cement by weight and 6 gallons water per sack of cement. HWCPIS 2.6(e)

1,500 ft.

1) The state engineer shall require a meter on each new 72-12-1.1 domestic well permitted:
(a) within a domestic well management area;
(b) when a metering requirement is imposed by the courts;
(c) for drinking and sanitary domestic use that is incidental to the operations of a governmental, commercial, or non-profit facility;
(d) for multiple households domestic use;
(e) as a supplemental 72-12-1.1 well; the 72-12-1.1 domestic well being supplemented shall also require a meter; and
(f) as a multiple use well such that the diversion of water for domestic use is separately metered.
(2) The state engineer may require a meter on a new 72-12-1.1 domestic well:
(a) permitted for single household domestic use;
(b) permitted to accompany a residence or other dwelling constructed for sale;
(c) as a condition of a permit to repair or deepen a 72-12-1.1 domestic well;
(d) as a condition of a permit to amend the type of domestic use of a 72-12-1.1 domestic well permit; or
(e) as a condition of a permit to transfer a valid, existing water right to a 72-12-1.1 domestic well permit in accordance with subsection E of 19.27.5.14 NMAC.

10 CSR 23-3.090 sets specific additional standards for certain regions in Missouri, including Area 1) limestone or dolomite area, Area 2) Central Western Missouri, Area 3) NW Missouri, Area 4) NE Missouri, Area 5) Missouri Bootheel and all major stream alluvial areas, Area 6) St. Francois Mtn area. 10 CSR 23-3.100 sets specific additional standards for Sensitive Areas designated either naturally occurring problems or fragile groundwater environment outlined in maps in Code of State Regulations (7/31/07).

10 ft from right of way, 25 ft from edge of road surface or 10 ft from road utility easement, whichever greater.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft.

10 ft. (with watertight joints)

10 ft. grout plug to be placed opposite the impervious formation or confining layer w/ grout tremie pipe. Entire column to be filled w/ grout. Grout plug of at least 10 ft. to be placed from at least 13 ft. below surface to top of cut off casing. If there is an open bore hole below casing, top 20 ft. of casing to be removed or perforated. Prevent bridging by placing clays, silts, sand, & gravel between plugs. From ground level to 3 ft. below ground level, well shall be backfilled with clean, compacted soil and sloped to direct runoff away from well.

10 ft. minimum except within 5 ft of foundation where both lines enter building and they must cross. In this case, minimum of 12 vertical inches between the lines, preferably water line above sewer line. At crossings, water pipe should be located so that joints are minimum of 10 ft from sewer line, and 20 ft section pipe sleeve installed on either line, with sleeve sealed at both ends. Water and sewer lines may not share same trench except where they must cross.

10 ft. See Department for requirements to obtain written approval for distances between 5-10 ft.

10 ft., increased to 50 ft. when adjacent to agricultural cropland.

100 feet from identifiable potential or existing sources of contamination. Exceptions are addressed in subsections 5.1.1.2, 5.1.1.3, 5.1.1.4, 5.1.1.5, 5.1.1.6, and 5.1.1.8. The Department requires that all wells be placed the maximum distance possible from lands where federally regulated chemicals have been applied. Pesticides that have been applied in accordance with their respective pesticide product label and are not associated with any known contamination are exempt.

100 ft from solid manure storage area not covered by a roof, safeguarded area used to store agricultural chemicals, or clean or fill ag chemical application equipment protected with safeguards.

100 ft from unroofed animal feedlot holding >=300 animal units, 50 ft if feedlot holds more than one animal unit. 50 ft from feeding or watering area. 20 ft if feedlot, confinement area, or kennel holds less than 1 animal unit. Distances are doubled to 200, 100, and 40 ft from a sensitive well. A "Sensitive water-supply well" is defined as a water-supply well with less than 50 feet of watertight casing where the casing does not penetrate a confining layer or multiple layers of confining materials with an aggregate thickness of 10 feet or more.

100 ft, 150 ft applies to instances where new well is installed in conjunction with new seepage pit system pursuant to N.J.A.C. 7:9A-4.3.

100 ft, if well casing is <80 ft in depth and does not encounter at least 10 ft impervious material must be 150 ft.

100 ft, if well casing is <80 ft in depth and does not encounter at least 10 ft impervious material must be 150 ft.

100 ft.

100 ft.

100 ft.

100 ft.

100 ft.

100 ft.

100 ft.

100 ft.

100 ft.