The well setbacks come from the State Water Resources Control Board Title 22 Code of Regulations, Article 4. Use Area Requirements. A summary of the setbacks are listed below and further information can be found in the regulation
- Tertiary recycled water – 50’ from a domestic water supply well
- Secondary 23 recycled water – 100’ from a domestic water supply well
- Undisinfected secondary recycled water – 150’ from a domestic water supply well
- No spray irrigation of any recycled water other than disinfected tertiary recycled water shall take place within 100’ of a residence or a place where public exposure could be similar to that of a park, playground, or school yard.