A local water conservation meeting turned tense Wednesday night, as dozens shared their concerns over a proposed bill that would require some with septic tanks to switch to the valley’s sewer system. Assembly Bill 220 would give Southern Nevada Water Authority the power to require anyone with a septic tank to switch to the valley’s sewer system by 2054. The event, held at the Las Vegas Valley Water District, focused on AB 220’s specific impact on septic systems. … The proposal would give Southern Nevada Water Authority the power to require those with septic tanks connected to municipal water, to switch to the valley’s sewer system by 2054.