A system for tank continuous level sensing, comprising: a continuous level sensor, CLS, coupled with an aircraft waste tank, the CLS configured to measure a weight of the aircraft waste tank; an integrated system controller, ISC, having a processor operatively coupled with the ISC, the CLS operatively coupled with the ISC; a flush counter mechanically coupled with an aircraft lavatory flush valve and operatively coupled with the ISC; an upper point level sensor, PLS, mechanically coupled with the aircraft waste tank and operatively coupled with the ISC; a lower PLS mechanically coupled with the aircraft waste tank and operatively coupled with the ISC; a crewmember indicator operatively coupled with the ISC; a tangible, non-transitory memory configured to communicate with the ISC and the processor, the tangible, non-transitory memory having instructions stored therein that, in response to execution by the ISC, cause the ISC to: set a first average flush volume based on a plurality of average flush volume inputs; receive a weight from the CLS; receive an aircraft status; determine a filtered waste tank level based on the weight and the aircraft status; receive a lower quantity input from the lower PLS; receive a first flush count from the flush counter; correlate the first flush count with the lower quantity input to determine a second average flush volume; determine a weighted waste tank level based on the filtered waste tank level, the second average flush volume, and the first flush count; receive an upper quantity input from the upper PLS; receive a second flush count from the flush counter; correlate the second flush count with the upper quantity input to determine a third average flush volume; update the weighted waste tank level based on the filtered waste tank level, the third average flush volume, and the second flush count; determine a max flush count to fill the waste tank; alert a crewmember via the crewmember indicator if the weighted waste tank level reaches a predetermined value. a continuous level sensor, CLS, coupled with an aircraft waste tank, the CLS configured to measure a weight of the aircraft waste tank; an integrated system controller, ISC, having a processor operatively coupled with the ISC, the CLS operatively coupled with the ISC; a flush counter mechanically coupled with an aircraft lavatory flush valve and operatively coupled with the ISC; an upper point level sensor, PLS, mechanically coupled with the aircraft waste tank and operatively coupled with the ISC; a lower PLS mechanically coupled with the aircraft waste tank and operatively coupled with the ISC; a crewmember indicator operatively coupled with the ISC; a tangible, non-transitory memory configured to communicate with the ISC and the processor, the tangible, non-transitory memory having instructions stored therein that, in response to execution by the ISC, cause the ISC to: set a first average flush volume based on a plurality of average flush volume inputs; receive a weight from the CLS; receive an aircraft status; determine a filtered waste tank level based on the weight and the aircraft status; receive a lower quantity input from the lower PLS; receive a first flush count from the flush counter; correlate the first flush count with the lower quantity input to determine a second average flush volume; determine a weighted waste tank level based on the filtered waste tank level, the second average flush volume, and the first flush count; receive an upper quantity input from the upper PLS; receive a second flush count from the flush counter; correlate the second flush count with the upper quantity input to determine a third average flush volume; update the weighted waste tank level based on the filtered waste tank level, the third average flush volume, and the second flush count; determine a max flush count to fill the waste tank; alert a crewmember via the crewmember indicator if the weighted waste tank level reaches a predetermined value.