All wells discharging to sources of contamination, such as livestock watering tanks, must be provided with an approved backflow prevention device or an airgap to prevent the backflow or siphonage of contaminants into the well. The airgap should provide a minimum vertical distance between the potable water pipe outlet and the water surface of not less than twice the diameter of the outlet pipe. Greater distances are preferable.
Overflow lines from stock watering tanks or other sources of contamination may not discharge to the well.
Please consult the North Dakota state plumbing code for details.
N.D. Admin Code 33.1-18-01-10
General Authority: NDCC 43-35-19, 43-35-19.1; S.L.2017, ch.199, § 1
Law Implemented: NDCC 43-35-19, 43-35-19.1; S.L.2017, ch.199, §§ 45, 46