Essentials of environmental health. Enhancing your occupational health nursing practice (Part II).

1. In the United States, approximately 24 million people use water daily from unregulated water supplies. Agents of water pollution can be categorized as biological (e.g., Cryptosporidium parvum), chemical (e.g., industrial solvents), or radionuclide (e.g., radon). 2. More than 600 chemicals are registered with the Environmental Protection Agency as pesticides in the United States. Human exposure occurs through direct contact or dermal absorption, inhalation, and ingestion of food, water, and breast milk. It is estimated that 50% of all the pesticides ingested in a lifetime are ingested in the first 5 years of life. 3. Children are at particular risk for exposure to environmental toxicants like pesticides because of time spent crawling and playing on floors, lawns, and other potentially contaminated surface areas, and hand to mouth behaviors. At this time, toxicity data for many pesticides in common use are inadequate to determine potential for neurotoxicity and adverse effects on the developing immune and endocrine system. 4. To meet the challenge of environmental health issues, occupational and environmental health nurses have important opportunities to promote health in the workplace and the community through research, direct clinical services, advocacy, and education.