Can I make changes to an approved plan?
Yes. Any proposed changes to the septic system that occur after permit issuance will require an additional plan review. New or revised site plans and/or recalculations must be submitted and approved prior to construction. Additional fees will apply.

Undocumented changes observed during the construction inspection will result in costly delays, additional procedures, and, potentially, additional fees. The Maricopa County Environmental Services Division encourages all applicants to spend a little extra time planning the project, keep up to date on any changes that do occur throughout the project, and notify the proper authorities of such changes as soon as possible.

Show All Answers

1. How do Onsite Wastewater Treatment Facilities (OSWTFs) work?
2. Why do Onsite Wastewater Treatment Facilities fail?
3. What items should not be put down the drain?
4. Do Onsite Wastewater Treatment Facilities (OSWTFs) cause health or water quality problems?
5. Can I apply for a permit to drill a well at the same time I apply for the Onsite Wastewater Treatment Facilities (OSWTF) permit?
6. My neighbor’s OSWTF is located on my property. What do I do?
7. What is an alternative system?
8. What are the different types of alternative systems allowed in Maricopa County?
9. Do I have to hire an engineer to design my system and draft my plans?
10. Can I make changes after I have submitted the NOID packet?
11. Can I make changes to an approved plan?
12. Can I request a partial construction inspection?
13. What type of rock should I use in the trenches, beds, or pits?
14. What are the requirements for installing a septic tank?
15. What are the requirements for installing the distribution box?
16. What are the requirements for installing the disposal field?
17. My system is failing. What do I do?
18. Can I use the existing septic system for my new house?
19. When can you release my building permit?