§ 8b

\n''Interbasin transfer'', any transfer of the surface and groundwaters, including wastewater, of the commonwealth outside a river basin. If a city or town partially situated within a river basin takes waters from that basin, extension of water services to a portion of the same city or town outside the basin shall not be deemed an interbasin transfer of water.\n''Insignificant increase'', an increase insufficient to invoke the provisions of section eight C and eight D as determined by the commission; provided, however, that in no event shall an increase over one million gallons per day be deemed insignificant.\n''River basin'', a geographic area within the commonwealth determined by a body of water and its surrounding drainage area as delineated by the commission.