Blue Plains Wastewater Treatment Plant
Blue Plains Wasterwater Treatment Plant
(DC Water and Sewer Authority photo)

Phosphate Free Detergents
Phosphate free detergents


  • Northern Virginia Waste Water Treatment Plants voluntarily impose a phosphorus limit. Virginia passes a de-chlorination initiative.


  • Maryland initiates a phosphate ban and a striped bass moratorium.


  • All major waste water treatment plants in the metro Washington area have achieved phosphorus removal.
  • D.C. initiates a phosphate detergent ban.
  • SAV distribution is now over 3,600 acres. Mechanical harvesting of hydrilla is initiated


  • Blue Plains Wastewater Treatment Plant starts removing chlorine.
  • A survey finds 78 species of fish in the metro Washington Potomac.
  • Virginia initiates a phosphate ban.


  • Maryland finds dioxin in North Branch fish.
  • Polychlorinated Biphenyls (PCBs) are found in Shenandoah fish.
  • PCBs and chlordane are found in fish in the Washington, D.C. area.
  • The Annual Potomac River Cleanup begins with its first two sites at the Alice Ferguson Foundation and the National Colonial Farm in Accokeek, Maryland