Pesticide REI / PHI Clock
Time remaining on the restricted-entry interval and pre-harvest interval from elapsed time since application.
Example
You enter
- Restricted-entry interval (hr, from label) 12
- Pre-harvest interval (days, from label) 7
- Hours since application 4
- Days since application 2
You get
- REI status 8
- PHI status 5
Checked against published worked examples from: EPA WPS 40 CFR 170 + product label.
Details, formula, and sources
ScopeWith early-entry / early-harvest violation flags. Per EPA WPS 40 CFR 170 and the product label (the label is the law, FIFRA).
Formula or tableREI 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.
Source and editionEPA Worker Protection Standard 40 CFR 170 (REI) and the product label's PHI, by name.
Free accessFree at epa.gov and ecfr.gov; the label is the law (FIFRA).
What governsRead and follow the product label. The label is the law (FIFRA).
API field namesrei_hours, phi_days, hours_since_application, days_since_application, rei_remaining_hours, phi_remaining_days
- REI / PHI user-supplied from the product label (the label is the law)product label / 40 CFR 170