Drinking Water Quality Standards: Microbiological, Chemical, and Radioactive Parameters

Drinking Water Quality Standards

Type I: Microbiological Parameters and Turbidity

Criteria for microbiological parameters and turbidity:

  • Microbiological Contamination Indicator Microorganisms: Microorganisms from the coliform group are a good indicator of microbial water quality. Water must meet the following characteristics:
    • For all samples analyzed monthly, a drinking water service accepts the presence of total coliform in:
      • One sample when fewer than 10 samples are analyzed in the month.
      • 10% of the
Read More