Landfill
Buffalo Ridge Landfill
Keenesburg, CO · 31.4 mi away
Landfill
North Weld Sanitary Landfill
40000 Weld County Road 25, Ault, CO 80610
At the gate
| Type | Landfill |
|---|---|
| Address | 40000 Weld County Road 25, Ault, CO 80610 |
| County | Weld County |
| Website | www.wmsolutions.com/locations/details/id/55 |
| Last checked | Oct 22, 2026 |
Hours
| Mon | 7:00 AM – 4:30 PM |
|---|---|
| Tue | 7:00 AM – 4:30 PM |
| Wed | 7:00 AM – 4:30 PM |
| Thu | 7:00 AM – 4:30 PM |
| Fri | 7:00 AM – 4:30 PM |
| Sat | 7:00 AM – 3:00 PM |
Holiday hours vary. Gates often close to new loads 15–30 minutes before posted closing.
Accepted materials
| Accepted materials | asbestos-non-friable, auto shredder fluff, biosolids, cercla waste, construction & demolition debris, municipal solid waste, oilfield wastes (e&p exempt), oilfield wastes (non e&p exempt), sandblast media, sludges - industrial (non regulated/non rcra), soils - contaminated (non haz), yard waste/green waste |
|---|
Fees has not been confirmed yet. Check the operator's website before you go.
Facility facts
| Ownership | Private |
|---|---|
| Owner | WM |
| Operator | WM |
| Operational status | Open |
| Waste types accepted (per permit) | MSW |
| Year opened | 1992 |
| Planned closure year | 2053 |
| Current area (acres) | 91.1 |
| Design area (acres) | 170 |
| Design capacity (tons) | 38,933,891 |
| Waste in place (tons) | 13,102,853 |
| Waste-in-place year | 2022 |
| Annual waste accepted (tons) | 763,262 |
| Annual waste figure year | 2022 |
| Landfill gas collection system | Yes |
| Landfill gas energy project | No |
| Composting on site | No |
| Not accepted | hazardous waste |
Permit and registry IDs (2)
| EPA GHGRP ID | 1007880 |
|---|---|
| EPA LMOP landfill ID | 1738 |
Suggest a correction
Hours changed, fees went up, gate moved? Tell us and we will check it. Own or manage North Weld Sanitary Landfill? Use the same form to claim it.
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Sources: epa.gov (facility record, facility facts and permit and registry IDs; fetched Oct 21, 2026) ; wmsolutions.com (website and accepted materials; fetched Oct 22, 2026) . Registry figures are as of Sep 20, 2024. Facility details were last checked on Oct 22, 2026.