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Water: Water Quality Standards Academy

Deriving the CCC: FCV to CCC

Aquatic Life Criteria

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Basic Course: Supplemental Topics

The CCC can then be set as equal to the FCV, unless an adjustment is made to factor in other available data for deriving the CCC. For instance, the final chronic value can be adjusted downward to reflect available data from plant studies that yield a Final Plant Value (FPV) or from studies on commercially or recreationally important animal species yielding a Final Residue Value (FRV).

Step 2 Tasks for
Establishing WQBELs
  • Identify Pollutants of Concern
  • Establish Whether Dilution/Mixing Is Allowed
  • Identify Critical Conditions for Modeling
  • Establish Dilution Allowances or Mixing Zones

For informational purposes only–Not official statements of EPA policy.

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