| Subject | Counties Served |
| Sanitary Sewer Collection Systems | Pepin, Pierce, St. Croix |
| Wastewater Pretreatment Program | Pepin, Pierce, St. Croix |
| Wastewater Treatment Plants | Pepin, Pierce, St. Croix |
| WPDES Permits, Compliance Maintenance Annual Report (CMAR) | Pepin, Pierce, St. Croix |
| WPDES Permits, Discharge Monitoring Reports | Pepin, Pierce, St. Croix |
| WPDES Permits, Metal Finishing and Electroplating | Pepin, Pierce, St. Croix |
| WPDES Permits, Operation, Maintenance of Wastewater | Pepin, Pierce, St. Croix |
| WPDES Permits, Operator Certification, Wastewater Treatment Plants | Pepin, Pierce, St. Croix |
| WPDES Permits, Phosphorus | Pepin, Pierce, St. Croix |
| WPDES Permits, SWAMP Reports | Pepin, Pierce, St. Croix |