IPC Plumbing Code by State
Alabama IPC adopted by Local Governments
Alaska UPC adopted at State level but IPC in use locally
Arizona UPC adopted at State level but IPC in use locally
Connecticut IPC effective Statewide
D.C. IPC effective in city
Delaware IPC effective Statewide
Florida IPC effective Statewide
Georgia IPC effective Statewide
Illinois Develops their own code
Illinois IPC adopted by Local Governments
Iowa IPC adopted by Local Governments
Iowa UPC effective Statewide
Kentucky State Plumbing Code based on IPC precursor
Louisiana State Plumbing Code based on IPC precursor
Maine IPC adopted by Local Governments
Michigan IPC effective Statewide
Mississippi IPC adopted by Local Governments
Missouri TBD either IPC or UPC effective Statewide
New Hampshire IPC effective Statewide
New York IPC effective Statewide
North Carolina IPC effective Statewide
Ohio IPC effective Statewide
Oklahoma IPC effective Statewide
Pennsylvania IPC adopted, but may not yet be effective
Puerto Rico IPC effective Statewide
Rhode Island IPC effective Statewide
South Carolina IPC effective Statewide
Tennessee IPC effective Statewide
Texas IPC at State but Austin, Houston, San Antonio use UPC
The Texas State Board of Plumbing Examiners recognizes the 2006 editions of the UPC, IPC, & IFGC which means each city or town in the state can either adopt the UPC or IPC/IFGC regardless of edition.
Utah IPC effective Statewide
Vermont Use 1990 BOCA (BOCA now under IPC)
Virginia IPC effective Statewide
West Virginia IPC effective Statewide
Wisconsin Plumbing Code Link
Wyoming Both IPC & UPC used by Local Governments
Louisiana State Plumbing Code
I hope I'm allowed to post this.
Here is Louisiana State Plumbing Code Title 51.
And this pdf shows some of the changes made for 2013. (It's worth looking at because some of the images used are unintentionally funny- starting with the image on page 15). Page 21 has an interesting toilet bicycle image.
Louisiana no longer allows Air Admittance Valves.
The maximum distance from a 2" trap to the vent has been reduced from 8' to 6'.
Also, I found this link that fills in some of the blanks on states that are missing:
Arkansas uses IPC
California is based on UPC
Colorado uses IPC
Guam uses IPC
Hawaii uses UPC
Idaho uses IPC
Indiana uses the Indiana Plumbing Code and as of 2012 used the 2006 IPC second printing
Kansas uses IPC
Maryland uses IPC
Massachusetts uses UPC, 248 CMR 10.00.
Minnesota uses Minnesota Plumbing Code
Missouri uses UPC
Montana uses UPC
Nebraska uses IPC
Nevada uses IPC
New Jersey uses NSPC
New Mexico uses New Mexico Plumbing Code based on UPC
North Dakota uses IPC
Oregon uses Oregon Specialty Plumbing Code based on UPC
South Dakota uses UPC
Washington uses UPC
I could be wrong on some of these, but I took them from websites. One source said Indiana uses UPC but another said specifically the IPC 2006 second printing.