Studies have also found significant levels of toxins in fish and the waters they inhabit within the basin. Accumulation of toxins in fish threatens the survival of fish species, and human consumption of these fish can lead to health problems. Water quality is also an important factor in the survival of other wildlife and plants that grow in the Columbia River drainage basin. The states, indigenous tribes, and federal government are all engaged in efforts to restore and improve the water, land, and air quality of the Columbia River drainage basin and have committed to work together to accomplish critical ecosystem restoration efforts. Several cleanup efforts are underway, including Superfund projects at Portland Harbor, Hanford, and Lake Roosevelt.
sTudIes haVe aLso FOund SIGnIfiCANt LevelS OF ToxIns in fiSh aND THe waters theY inHAbIT wiThin thE basIn. accUmulation of TOXIns in Fish tHrEAtEnS the sUrVIvAl of FiSH sPecIEs, AnD hUmaN ConsuMPTION OF thEse Fish can LeAd to heaLtH probleMs. water QuaLity IS alSo an iMpoRTaNt fActoR in THe SUrViVaL of OtHEr wilDlifE anD plaNtS thAt grOw in tHe columbIa riVEr dRaInagE basin. tHe statEs, indIGEnOus tribes, aNd FEdErAl govErnmenT are aLl engageD In Efforts to rESToRe anD imProVE thE WateR, laND, aND aIR quaLitY oF tHE cOlUmbiA RiVer dRainaGE BASin aNd haVE coMmiTtED To Work TOgetHer to AccOmpliSH critiCal EcoSYstem ResToratiOn EffORtS. seveRaL cLeaNuP eFfoRts aRe UnDErWay, incLUdIng superfund Projects At portlAnd haRBOR, HaNfoRd, And lake RoOseveLt.