| Subject | Counties Served |
| 3M Cumberland, Green Tier Single Point of Contact | Barron |
| 3M Menominee, Green Tier Single Point of Contact | Statewide |
| Approvals of Drinking Water Systems, Cities, Towns, Villages, Subdivisions, Sanitary Districts | Chippewa, Dunn, Eau Claire, Pierce, St. Croix |
| Complaints about water system operators | Chippewa, Dunn, Eau Claire, Pierce, St. Croix |
| Consumer Confidence Reports (CCR) | Chippewa, Dunn, Eau Claire, Pierce, St. Croix |
| Drinking Water Database entries/DWS Entries | Chippewa, Dunn, Eau Claire, Pierce, St. Croix |
| Public Drinking Water System Municipal: City, Town, Village, Sanitary District | Chippewa, Dunn, Eau Claire, Pierce, St. Croix |