The Precautionary Group LLC

Nearly all chronic diseases result from the cumulative effects of long-term exposure to low levels of environmental contaminants and pollutants

Finding Out

Toxic Until Proven Safe


Where threats of serious or irreversible harm to people or nature exist, anticipatory action must be taken to prevent damage to human and environmental health

Call to Action:

- Immunodeficiency and Autoimmunity are incited by environmental toxins, toxicants and antigens

- Immunodeficiency and Autoimmunity incite chronic disease

- Nearly all chronic diseases are caused by environmental contaminants and pollutants

- The chemistry and microbiology of Sewage Sludge are unknown

- The environmental impact of land-applied Sewage Sludge on forest watersheds and agricultural lands is unknown

We intend to Find Out


The proponent of an activity bears responsibility

for providing evidence of safety

Protecting Watersheds and Croplands


Evaluating the effects of Sewage Sludge applied to forest soils and agricultural lands on human and environmental health

Thesis: The application of Sewage Sludge to forest soils and agricultural lands degrades the natural environment, compromises ecosystem sustainability and biodiversity, and threatens human and environmental health

Mission Statement: The Precautionary Group was formed to evaluate the adverse effects of Sewage Sludge and other toxic wastes on human and environmental health


  • Determine the chemical, biochemical and microbiological composition of Sewage Sludge and other toxic wastes
  • Detect and identify gastrointestinal and respiratory pathogens contributed to watershed and agricultural environments in land-applied Sewage Sludge
  • Determine the toxicity of Sewage Sludge components on the biota of forest watersheds, agricultural lands and associated ecosystems
  • Employ toxicology testing as the primary measure of toxicity
  • Detect and characterize carcinogens and neurotoxins in Sewage Sludge
  • Evaluate the fate of toxins and pathogens in land-applied Sewage Sludge in watershed and agricultural environments


The Precautionary Principle: When an activity raises threats of harm to human health or the environment, precautionary measures must be taken, even if cause and effect relationships are not fully established scientifically

The Core Tenets of the Precautionary Principle:

  • Take preventive action in the face of uncertainty
  • Shift the burden of proof to proponents of an activity
  • Explore a wide range of alternatives to possibly harmful actions
  • Include public participation in decision making


The number of known or suspected environmental pathogens, mutagens, carcinogens, teratogens, endocrine disrupting chemicals and other toxic chemicals compels us to protect public health, without irrefutable proof of harm

(The President's Cancer Panel: Reducing Environmental Risk, April 2010)

Expected Outcome: The Precautionary Group intends to analyze the chemistry and microbiology of Sewage Sludge and Wastewater Effluent as they are produced by the wastewater treatment process and released into Cascade forest soils and waters and into rivers and Puget Sound. The results of a series of chemical and microbiological analyses of the impact and fate of sewage sludge and wastewater effluent components using advanced technologies and methods will be reviewed objectively and published widely for use by agencies and the public.

Images: The images below show the natural beauty of the Cascade Mountains and Puget Sound, which define the region and provide the basis for the superb quality of life that is afforded the residents of the Northwest, and which is the foundation of the tourist industry in the Cascade and Puget Sound region. Why are these valuable and highly beneficial attributes compromised for purposes of sludge disposal convenience? Note the linked PDF file below the images titled, Cascade Forests and Puget Sound.

We intend to Find Out

The Precautionary Group
A Washington State Company
Protecting Cascade Watersheds and Puget Sound