Frequently Asked Questions

View coverage of questions regarding the National Pretreatment Program in general on the EPA's website.
  1. What are prohibited discharge standards?
  2. What are categorical pretreatment standards?
  3. What are local limits?
  4. Who needs to develop local limits?
  5. What is wastewater?
  6. How is wastewater treated?
  7. What if my sewer is not flowing normally?
  8. How often should I clean my grease trap or grease interceptor?
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