Enviroware

Atmospheric screening tool

TOXFLAM online

A simplified web version for rapidly estimating concentrations from a stack or point source, using meteorology, plume rise and receptors along a selected alignment.

Open calculator Air quality services
  • Point source
  • Continuous or finite release
  • Pasquill-Gifford
  • Version 2024-07-31
TOXFLAM Tool
TOXFLAM concentration example
Fast screening for simple cases. Permitting-grade work needs a documented modeling study.

Calculator

Enter input data.

Source
Stack uses the simplified ISC plume-rise calculation.
m.
m.
m/s.
C.
g/s.
s.
Meteorology
Pasquill-Gifford.
m/s.
m.
C.
m.
Rural or urban.
Receptors
0 = downwind, 90 = crosswind.
m.
Must divide the maximum distance exactly.
m.
s.
s.
Fill in the form and run the calculation.

Limits

A screening estimate, not a permitting model.

This simplified version considers one point source and receptors along one alignment. Complex cases require site-specific meteorology, a full domain and documented modeling.

  1. 01
    QC
    Always check units, parameter validity and meteorological conditions.
  2. 02
    Screening
    Use the result as a preliminary analysis for simple scenarios.