Powder Coating Pretreatment in Austin and Central Texas
Updated: 3 days ago
Short answer: In Austin, any business that sends industrial wastewater to the city sewer needs a permit from Austin Water's Pretreatment Program, and new lines or process changes need Industrial Waste plan review before they are built. In San Antonio, SAWS's Industrial Pretreatment Program sets the rules. A CPR Systems closed-loop pretreatment line recycles its wash water and chemistry with no process discharge, so your pretreatment stage stops being a sewer question.
Who regulates powder coating wash water in Central Texas?
Area | Authority | What it means for a powder line |
Austin | "A permit from Austin Water's Pretreatment Program is required to discharge any industrial wastewater" (source). Most shops fall under a General Industrial User permit; larger or categorical users are Significant Industrial Users with self-monitoring and reporting. | |
Austin (new sites and changes) | Approval is required "before any new construction or plumbing or process change" that could affect industrial wastewater. | |
San Antonio corridor | Categorical users under 40 CFR 405-471 get individual permits and monitoring; facilities over 25,000 gallons a day of process water may need an Industrial Wastewater Discharge permit. | |
Statewide | Oversees Texas pretreatment programs; see our Texas guide. |
Do I need Austin Water plan review for a new powder coating line?
Yes, if the line changes what you send to the sewer. Austin Water reviews site and building plans for pretreatment equipment, and an Industrial Waste Approval Letter is required "before installing, modifying or removing any pretreatment device" (Austin Water).
For complex projects the city asks you to call before submitting: Industrial Waste Plan Review, 512-974-7293. A closed-loop line with no process discharge is far simpler to explain at that review than a wash stage that drains.
Why are new suppliers coming to Central Texas?
Semiconductor and EV plants are pulling suppliers into the corridor: Samsung's Taylor fab (REBusiness), Tesla's Giga Texas expansions (FreightWaves), and Applied Materials' Austin site, its largest manufacturing and logistics facility (Applied Materials).
Caterpillar also builds in San Antonio, Schertz and Seguin (Caterpillar). Frames, weldments and enclosures for these plants need a controlled pretreatment step before powder.
What pretreatment do Applied Materials suppliers need?
Applied's supplier engineers audit sheet-metal suppliers' processes, including finishing and process controls (Applied Materials job posting). That means a documented, repeatable pretreatment process.
CPR Systems' California clients meet the Applied Materials spec. Tell us the spec on your drawing and we'll work backward to the right chemistry and stages, and clean sample panels free so you can run your own tests.
What pretreatment do Caterpillar suppliers need?
Caterpillar suppliers run an iron phosphate wash, a rinse and a seal. CPR Systems builds lines to both CAT 1E4093 levels: High Performance B (iron phosphate wash, RO water rinse, seal) and Standard Performance C (iron phosphate wash, tap-water rinse). See Pretreatment for Caterpillar Suppliers for both process options, and confirm the level on your drawing or PO.
Spray wand or stage washer?
Your situation | Typical fit |
Job shop or fabricator bringing powder in-house, mixed part sizes | Spray wand pretreatment with closed-loop recycling |
Steady volume on a conveyor line | Single-step or 5/7-stage washer |
New line going through Austin Water plan review | Either, designed with no process discharge |
More detail: 3/5/7-stage washers explained and iron phosphate vs. zirconium.
How does a CPR Systems closed loop work?
The pretreatment solution is filtered and the chemistry stays in use, wash after wash, with no process discharge. Run your own numbers in the savings calculator.
Frequently asked questions
Does Austin require a permit for powder coating wash water?
Yes, if it goes to the sewer: Austin Water requires a permit for any industrial wastewater discharge (source).
How often do Austin General Industrial User permits renew?
Automatically each December for the next calendar year (source).
Who do I call at Austin Water?
Pretreatment Program: 512-972-1060, option 5; Industrial Waste Plan Review: 512-974-7293 (FAQ, plan review).
What happens if I discharge without a valid permit in Austin?
Austin Water lists fines of up to $2,000 per day and possible water service termination (FAQ).
Who regulates wash water in San Antonio, Schertz and Seguin?
SAWS's Industrial Pretreatment Program within its service area (SAWS); confirm with your local utility outside it.
Can you test my parts first?
Yes. We clean sample panels free so you can run your own adhesion and corrosion tests.
Get a Quote · Text 574-233-9111 · contact@cprsystemsonline.com
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