Pesticide REI / PHI Clock
Time remaining on the restricted-entry interval and pre-harvest interval from elapsed time since application, with early-entry / early-harvest violation flags. Per EPA WPS 40 CFR 170 and the product label (the label is the law, FIFRA).
Formula and source
REI remaining = max(0, REI_hours - hours since application); PHI remaining = max(0, PHI_days - days since application); early-entry / early-harvest violation when not yet clear.
EPA Worker Protection Standard 40 CFR 170 (REI) and the product label's PHI, by name.
Audience
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Posture
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