- Winsor Installers & Excavating
- Withrow Construction Co Inc
- Wolfe's Backhoe & Dozer Svc
- Woods Waste Water Svc
- Woolum Construction
- Wright's Septic Tank Pumping
- Wright's Septic Tank Pumping
- Wright's Septic Tank Pumping
- Wyffels & Co
- Yale Tiling
- Yoder Septic Supplies
- Yoder's Backhoe & Truck Svc
- Yolo Pumping Svc
- Yon Septic Tank Co
- York Septic Systems
- Your Town Cesspool Plumbing
- Zavala Custom Orchard Works
- Zellner's Backhoe Svc
- Ziegler-Hopkins Co
- Zoladz Construction Co
