The IDNR Air Quality Bureau received new phone and fax numbers due to a recent upgrade that took effect on Monday, September 16. The new main Air Quality Bureau phone number is (515) 725-9500 and new main fax number is (515) 725-9501.  The Air Quality Construction Permit Hotline, 877-247-4692, was not impacted by this upgrade. For a complete listing of new phone numbers for IDNR Air Staff, click here.