Allocation Procedure for the Cross-State Air Pollution Rule

Missouri maintains state implementation plans (SIPs) that EPA has approved to allow the state to reallocate emission allowances for the control periods starting in 2017. The allowances pertain to the CSAPR trading programs for NOx annual and SO2 annual group 1. The allocation methods for these two programs are codified in State rules 10 CSR 10-6.372 and 10 CSR 10-6.376.

These rules require the department's Air Pollution Control Program to submit allowance allocations under these two programs every year to EPA. This webpage provides the required notifications and objection periods for the air program’s allowance allocation submissions.

Procedures for Allocation of CSAPR NOx and SO2 Annual Units

Allocation of Existing Units

      •  Public notification of identified non-operating units (Updated Feb. 27, 2020)

  • Facilities can submit objections to units that the state lists as non-operating during the last two control periods. Send an email by April 1, 2020, to submit objections.

  • Public notification of State’s response to objections for identified non-operating units (Updated Feb. 27, 2020)
  • State submittal of existing unit allocations to EPA (Updated Feb. 27, 2020)

  • EPA records the state submitted existing unit allocations for future year(s).

Allocation of New Units

  • Facilities with “future new units,” which started operating in the last 15 months, must submit information to identify such units along with their calculations for eligible allowances. Click here no later than April 5, 2020, to submit new units.

  • Public notification of new unit set-aside each year (Updated Feb. 27, 2020)

  • Facilities can submit objections to all new unit set-aside allowances. Send an email to submit objections no later than 15 days after the department posts its list of new unit set-asides.

  • Public notification of State’s response to objections for new unit set-asides (Updated Feb. 27, 2020)
  • State submittal of new unit allocations to EPA (Updated Feb. 27, 2020)

  • EPA records the state submitted new unit set-aside allowances for the current year.


    For questions, contact Aaron Basham at 573-751-4817.

    Keep visiting this webpage. The department will be adding more background information about CSAPR.