Concrete washout requirements in Texas (2026)
Concrete washout may not reach surface water or storm sewers. Show it on your SWP3 map.
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Key takeaways
- No concrete truck washout may be discharged to surface water or storm sewers.
- Dispose of it only where structural controls prevent discharge, or on minimal-slope ground that lets it soak in.
- Show every washout area on your SWP3 site map.
- Stucco, paint, form oil and curing compound washouts are also prohibited discharges.
What does the permit say about concrete washout?
Part VI of the permit allows no discharge of concrete truck washout to surface water or storm sewers.
Dispose of washout only where structural controls such as berms, shallow pits or tanks prevent discharge, or on ground with minimal slope that allows infiltration.
Minimize washout in rain. Do not contaminate groundwater.
What goes in the SWP3?
The site map shows the locations of pollutant-generating activities, including concrete, paint and stucco washout.
The permit also asks you to show washout areas on the map in Part VI.
What else is prohibited near the pour?
| Prohibited discharge | Permit part |
|---|---|
| Concrete washout wastewater, unless managed | Part IV.E |
| Stucco, paint, form oil and curing compound washout | Part IV.E |
| Fuels and oils, and soaps or solvents from washing | Part IV.E |
Wash waters from equipment and vehicles must be treated in a sediment basin or an equal control before discharge.
Do cities add rules?
Yes, cities may add rules. The permit does not limit local governments. Check your city's specifications for washout design.
FAQ
Can I wash a concrete truck out on the ground?
Only where structural controls prevent discharge, or on minimal-slope ground that allows infiltration, and never to surface water or storm sewers.
Do I need washout on my site map?
Yes. Show washout areas on the SWP3 site map.
Facts and sources
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