Know before this happens...
If you're a California QSD, QSP, or inspector, the 2022 Construction General Permit requires pre-storm inspections whenever a significant rain event — a Qualifying Precipitation Event (QPE) — is in the forecast. Miss one, and you're out of compliance.
Manually tracking forecasts across all your sites — every day, all season — is exactly the kind of task that gets missed when things get busy. QPE Assistant handles it for you.
We pull 7-day forecast data directly from NOAA's National Weather Service and apply the state's own compliance formula to each of your sites. When a QPE is coming, you'll know — before it arrives.
- Get a daily email showing upcoming QPEs across all your sites.
- Forward relevant reports to your inspectors automatically.
- Keep a full forecast history for audits and quality control.
Try it free. Our evaluation plan is fully functional — set up a site, run reports, and get real daily forecasts with no credit card required and no obligation. Get started →
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Useful Links
- CA State Water Resources Control Board
- 2022 Construction General Stormwater Permit (CGSP)
- State Water Resource Control Board 2022 CGP Road Show Presentation
- NOAA Weather
- NWS Weather Table
- California SMARTS Database
News
QPE Assistant was recently featured during Stormwater Awareness Week!
- Stormwater Awareness Week
(Sept. 22-26, 2025) - From Policy to Practice: Tracing the EPA's Origins to the 2022 Construction General Permit
(2025 presentation) - "Automating QPE Predictions for Your Sites - 2022 CGP"
(2024 Presentation)
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QPE Assistant is a product of feedback from the stormwater community. Please contact us with any questions, comments or suggestions for improvement.
We hope you find it useful.