4 verified septic companies across 2 cities in Williams County. Compare ratings, services, and request free quotes from local providers.
Williams County, North Dakota is home to a directory of 4 verified septic service companies operating across 2 listed cities in the county. Situated in the western reaches of North Dakota along the Missouri River, Williams County encompasses a mix of agricultural land, oil-patch development, and the growing city of Williston, which has seen significant population shifts tied to Bakken formation energy activity. That growth, combined with the region's cold winters and clay-heavy soils common to the northern Great Plains, creates a distinct environment for septic system owners. Whether you are managing a rural acreage property outside Epping or a residential lot in Williston, locating a qualified local contractor familiar with North Dakota's frost depths and seasonal ground conditions is an important step in maintaining a properly functioning onsite wastewater system.
Epping, ND
⭐ 4.8 (5 reviews)
MonDak Portables LLC is a WOSB and EDWOSB certified portable sanitation and trailer manufacturing company serving residential, commercial, oilfield, federal, and special event clients across North Dakota, Montana, Indiana, Wyoming, Nebraska, and Colorado. With over 14 years of experience dating back to 2008, the company maintains a fleet of more than 200 standard portable latrines, 20 handicap accessible units, and 30 handwashing stations. MonDak also operates a custom trailer manufacturing division that has produced over 50 climate controlled comfort station trailers, along with single and double toilet trailers, talent trailers, office trailers, kitchen support trailers, laundry trailers, and water purification trailers. Septic tank construction, cleaning, pumping, and repair services are also available. The company holds past performance records with the Department of Defense and Department of the Interior, including latrine rental and maintenance services at Warren Air Force Base. MonDak Portables LLC is available Monday through Saturday from 8 AM to 7 PM and offers free quotes for all project types.
Williston, ND
⭐ 5.0 (16 reviews)
Joe's Digging Service is a highly-rated septic service provider based in Williston, North Dakota. With a perfect 5.0 Google rating backed by 15 customer reviews, the company has established a strong reputation for reliable and professional service in the local community. Joe's Digging Service specializes in septic system maintenance, repairs, and related excavation work. Their consistent positive feedback reflects a commitment to quality workmanship and customer satisfaction. Whether homeowners or businesses need septic tank pumping, inspection, or installation services, Joe's Digging Service brings experienced expertise to every job in the Williston area.
Williston, ND
⭐ 5.0 (1 reviews)
Advanced Pump & Equipment, Inc. is a water and wastewater equipment representative serving Montana, Idaho, Utah, Wyoming, North Dakota, and South Dakota. With over 50 years of combined experience, the company supplies engineered pumps, controls and SCADA systems, treatment and process equipment, storage and structures, components and accessories, and packaged pump systems for municipal, commercial, and industrial applications. Their product lineup includes trusted brands such as Pentair, Homa, Vogelsang, Orenco, Alfa Laval, and more, with a commitment to partnering only with manufacturers that offer high-quality equipment and solid warranties. Advanced Pump & Equipment also supports septic system components and pump station accessories through their extensive inventory. Customers needing hands-on system support can be referred to sister company Peak Water Services, which employs state-certified water and sewer system operators and factory-trained technicians. For infrastructure protection, sister company Advanced Lining provides certified wastewater structure coatings to address corrosion and infiltration issues. Advanced Pump & Equipment can be reached by phone at (406) 586-1700 or by email at [email protected].
Williston, ND
⭐ 4.2 (21 reviews)
Vac-U-Jet is a comprehensive environmental management and septic services company based in Williston, North Dakota, serving the regional market. The company specializes in septic pumping, hydro-vac services, water delivery, and portable toilet rentals for residential, commercial, and industrial clients. Their service offerings extend to industrial waste management, hydro jetting, snaking, and emergency spill response, with equipment and personnel available for projects of any scale. The company distinguishes itself through a commitment to quality equipment, trained personnel, and reliable service delivery. Vac-U-Jet's technical field staff are OSHA HAZWOPER-certified, enabling safe handling of hazardous materials and emergency situations. They maintain compliance with industry standards including ANSI Z358.1 for emergency shower and eyewash services. The company offers 24-hour emergency response capabilities and serves diverse sectors including oil and gas, industrial manufacturing, and government agencies. With a 4.4 Google rating based on customer reviews, Vac-U-Jet demonstrates a track record of timely, cost-effective service completion across their full range of environmental and septic management solutions.
Williams County features a blend of rural farmsteads, scattered acreages, and denser residential neighborhoods in and around Williston. Many properties outside city limits rely on onsite septic systems, and the range of system ages reflects both longstanding agricultural settlement and newer construction tied to energy-sector growth. Gravity-fed septic systems are common on larger rural lots where soil conditions and slope allow for conventional drain fields, while pump-up and pressure-distribution systems are used where topography or soil permeability requires more controlled effluent dispersal. North Dakota's harsh winters mean that system components near the surface can be vulnerable to freezing, and spring thaw periods may temporarily affect drain field performance. Homeowners in Williams County should factor seasonal timing into their maintenance schedules, particularly for inspections and pumping.
Septic system permits in Williams County are generally issued through the Williams County Health Department, which oversees onsite sewage treatment in unincorporated areas of the county. North Dakota also operates under state-level guidance from the North Dakota Department of Environmental Quality, which sets baseline standards for system design, installation, and siting. A licensed installer is typically required for new system construction or significant repairs, and permits must usually be obtained before work begins. Point-of-sale inspections are not always mandated statewide, but lenders and buyers frequently request them as part of real estate transactions involving properties with onsite systems. Homeowners can find applicable rules by contacting the Williams County Health Department directly or reviewing the North Dakota Department of Environmental Quality's onsite wastewater resources. Always verify current requirements with your local health department.
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