Find an ORW/ERW

Which waters have been designated as ORWs or ERWs?

To look up specific waterbodies, you can use several sources:

Wisconsin Administrative Code NR 102
Waters currently designated as ORWs and ERWs are listed in Wisconsin’s Administrative Code in chapters NR 102.10 (ORWs) and NR 102.11 (ERWs). The code is the legally authoritative source, though it can be complex to interpret. If you would like assistance in determining whether a specific water you are interested in is an ORW/ERW, contact the ORW/ERW Coordinator, Kristi Minahan, at 608-266-7055 or kristi.minahan@wisconsin.gov.

• Wis. Admin. Code NR 102 [Exit DNR]

Maps of ORW/ERW

• Map of all ORW/ERW in Wisconsin [PDF 293KB]
• Searchable Online Map (Surface Water Data Viewer)
  NOTE: For directions on how to use the Surface Water Data Viewer to find an ORW/ERW, click here [PDF].

Lists of ORW/ERW
NOTE: In using the documents below, be sure to use both those from before 2006 and those from the 2006 addition, in conjunction with one another.

Waters listed as ORW/ERW before 2006
• Listed alphabetically by waterbody name [PDF 127KB]
• Listed by county [PDF 124KB]

Waters added to the list in 2006
• Listed alphabetically by waterbody name [PDF 7.3MB]