A waste water treatment and disposal system for further treating waste water effluent from a primary treatment system in which a system controller controls the operation of the system. A dosing tank accepts effluent from a primary treatment system and is evacuated on demand by a pump which is energized in response to a fluid level switch in the dosing tank. The pump forces the effluent through a filtering system to remove solid waste therefrom, and then forces a portion of the filtered effluent into a hydro-pneumatic pressure tank which, upon call, will backflush the filter to remove the trapped solids therein. The system controller will monitor the system to operate the level of the dosing tank, the operation of the pump and the various valves which control the flow throughout the system. The filtered effluent will ultimately be discharged into a disposal area by any number of well known methods. One such method may be by a dripper field in which the effluent is emitted through multiple drip emitters in a plurality of pipes laid underground. The system also has the capability of backflushing the dripper field to maintain the emitters open and operating.