McCall made a major impact three decades ago by stopping large industries from dumping concentrated waste into the Willamette.

CNN: Polluted rivers stain Portland's image

This, Lohan hopes, will allow the system to deal with more concentrated waste streams from big buildings and even operations like pig and dairy farms, which produce huge volumes of concentrated waste.

FORBES: Magazine Article

Farms, in contrast, have mostly escaped such enforcement, even as consolidation and automation have created very concentrated sources of animal waste, particularly in the pig business.

FORBES: Fowl Play

Effluent waste from these concentrated animal facilities are undermining what little clean water and healthy micro-nutrient cycles still exist out there.

FORBES: So Long To The Era Of Cheap Food?

Brian figured that if he could solve the technology and logistics problems required to anchor a fish farm 10 or 20 miles offshore, where swift currents carry away and disperse the waste produced by concentrated fish stocks, it would allow the farmed fish to swim in the same fresh water as their wild cousins-the best of both worlds.

FORBES: Regulatory Uncertainty Drives A Fish Farmer To Foreign Waters