Required Minimum Separation Distances for Public Water Systems

This feature service displays the 100-foot and 200-foot minimum required separation distances for active Public Water System (PWS) sources in Alaska, as per Drinking Water Regulations 18 AAC 80.020. The accuracy is dependent on the accruacy of the well or intake locations. The data is updated daily based up the location of well or intake. Belows is a summary of these regulations. Please refer to the official pdf document linked above inorder to ensure you are looking at the current version of the drinking water regulation. TABLE A. Minimum Separation Distances Between Drinking Water Sources and Potential Sources of Contamination (Measured horizontally in feet) All distances below apply to Community Water Systems, Non-transient Non-Community Water Systems, and Transient Non-Community Water Systems. Minimum separation distances are as follows: Wastewater treatment works, wastewater disposal systems, pit privies, sewer manholes, lift stations, sewer lines, and sewer line cleanouts must be separated by a minimum of 200 feet. Community sewer lines, sewer mains, wastewater holding tanks, and other potential sources of contamination must be separated by a minimum of 200 feet. Private sewer lines, sewer service lines, drains buried in the ground, petroleum lines and storage tanks, and drinking water treatment waste must be separated by a minimum of 100 feet. Notes: a. These minimum distances will be expanded, or additional monitoring will be required, under 18 AAC 80.020(b) and (e)(2). b. Distance to a drinking water source is measured from the nearest edge of the drinking water source to the nearest edge of the potential source of contamination. c. Other potential sources of contamination include sanitary landfills, and domestic animal and agricultural waste. d. The minimum separation distances for petroleum storage tanks do not apply to tanks that contain propane, or to above-ground storage tanks or drums that, in the aggregate, have a storage capacity of less than 500 gallons of petroleum products, and that store only petroleum products necessary for the operation and maintenance of pumps, power generation systems, or heating systems associated with a potable water source. e. Drinking water treatment wastes include the backwash water from filters and water softeners, and the reject water from reverse osmosis units.