| Company | Location | Certifications | License # |
|---|---|---|---|
| Davis County Health Dept. | Clearfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02766-OSP |
| Davis County Health Dept. | Clearfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03611-OSP |
| Eagle Enterprises Inc. | Clearfield, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03388-OSP |
| Edward Parker | Layton, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04405-OSP |
4 companies in the Utah DEQ certified onsite wastewater system professionals list are based in Davis County as of 2026-07-23. Companies based elsewhere in Utah also commonly serve the county.
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