Inorganic Contaminants (IOCs), Volatile Organic Contaminants, Synthetic Organic Contaminants

The chemical contaminants were promulgated in phases collectively called the Phase II/V Rules or the Chemical Contaminant Rules. These rules regulate over 65 contaminants in three contaminant groups:

  • Inorganic Contaminants (IOCs) (including arsenic and nitrate)
  • Volatile Organic Contaminants (VOCs)
  • Synthetic Organic Contaminants (SOCs)

The rules apply to all public water systems (PWS). PWS type, size, and water source type determine which contaminants require monitoring for that system. 

The Chemical Contaminants Rules provide public health protection through the reduction of chronic, or long-term, risks from:

  • Cancer
  • Organ damage
  • Circulatory system disorders
  • Nervous system disorders
  • Reproductive system disorders

EPA IOC info

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1. Aldehyde
2. Asbestos
3. Bromide/Bromate
4. Chlorate/Chlorite
5. Coal Ash
6. Disinfection Byproducts (DBP)
7. Endocrine Disrupting Compounds/ Pharmaceuticals and Personal Care Products
8. Fluoride
9. Giardia/ Cryptosporidium
10. Inorganic Contaminants (IOCs), Volatile Organic Contaminants, Synthetic Organic Contaminants
11. Lead and Copper
12. Long Term 2 Enhanced Surface Water Treatment Rule Documents
13. Nitrate
14. Perchlorate
15. Radionuclides
16. Total Organic Carbon/Alkalinity