Groundwater Wells & Permitting

Beneficial uses includes irrigation, stock watering, industrial, mining, domestic, and many other uses. The use of groundwater must be "reasonable" and A.R.S. 45-602 states that Groundwater which has been withdrawn shall not be allowed to waste. Flowing wells must be capped if the groundwater is not being put to use, and wells, pumps, and piping must be constructed and maintained so as to prevent the waste of groundwater.

All wells in the state, new and existing, should have a registration number beginning with 55- followed by six digits. A.R.S. § 45-593(B). For a new well, the registration number is assigned when the Notice of Intent to Drill or Application for a Permit to Drill is received by the Department. For existing wells, the registration is assigned when the Late Registration form is received. To understand how well registration numbers are assigned, read about the Wells 55 Index Numbering System.

a) The site of a remedial action undertaken pursuant to the comprehensive environmental response, compensation, and liability act of 1980, as amended (P.L. 96-510; 94 stat. 2767; 42 US Code section 9601 through 9657), commonly known as superfund. b)The site of a corrective action undertaken to title 49, chapter 6. c)The site of a voluntary remediation action undertaken pursuant to title49, chapter1,article 5. d)The site of a remedial action undertaken pursuant to title 49, chapter 2, article 5. e)The site of a remedial action undertaken pursuant to the resource conservation & recovery act of 1976 (P.L. 94-580; 90 Stat. 2795; 42 US Code sections 6901 through 6992). f)The site of remedial action undertaken pursuant to the dept. of defense environmental restoration program (P.L. 99-499; 100 Stat. 1719; 10 US Code section 2701). (R12-15-801)