Division of Water Quality
State and Federally Approved Total Maximum Daily Load Studies
What is a TMDL?
A Total Maximum Daily Load (TMDL) is the calculation of the maximum amount of a pollutant allowed to enter a waterbody so that the waterbody will meet and continue to meet water quality standards for that particular pollutant. A TMDL determines a pollutant reduction target and allocates load reductions necessary to the source(s) of the pollutant.
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- Bear River (Lower)
- Bear River (Including Spring Creek (Lewiston), Cub River, Logan River, and High Creek)
- Bear River (Upper, Including Saleratus Creek)
- Bear River Middle and Cutler Reservoir TMDL
- Beaver River Watershed (Beaver River, Minersville Reservoir, Puffer Lake, LaBaron Reservoir and Kents Lake)
- Brough, Red Fleet, and Steinaker Reservoirs
- Browne Lake
- Castle, Mill, and Pack Creek E.coli TMDLs
- Chalk Creek
- Clarkston Creek, Newton Reservoir, and Newton Creek
- Colorado River
- Cottonwood Wash
- Deer Creek Reservoir
- Duchesne River Watershed (Including Lake Fork River, Antelope Creek, and Indian Canyon Creek)
- East Canyon Creek
- East Canyon Reservoir
- East Fork Sevier River, Koosharem Reservoir, Lower Box Creek Reservoir and Otter Creek Reservoir
- Echo Creek
- Emigration Creek
- Fremont River Watershed (Johnson Valley Reservoir, Mill Meadow Reservoir, Forsyth Reservoir, UM Creek, Upper Fremont River and Lower Fremont River)
- Fremont River E. coli TMDL
- Hyrum Reservoir
- Jordan River Phase 1
- Jordan River Watershed E. coli TMDL | Appendices
- Ken’s Lake
- Little Bear River
- Little Cottonwood Creek
- Mantua Reservoir
- Matt Warner and Calder Reservoirs
- Mill Creek
- Newcastle Reservoir
- Nine Mile Creek
- North Fork Virgin River E. coli
- Onion Creek
- Otter Creek: 2006 | 1999
- Panguitch Lake
- Pariette Draw
- Pineview Reservoir
- Rockport Reservoir and Echo Reservoir
- San Pitch River
- Scofield Reservoir
- Sevier River (Middle and Lower)
- Sevier River (Upper)
- Silver Creek
- Soldier Creek
- Spring Creek
- Spring Creek (Heber) E.coli TMDL
- Strawberry Reservoir
- Thistle Creek
- Uinta River Watershed (Uinta River, Dry Gulch Creek and Deep Creek)
- Virgin River Watershed
- West Colorado Watershed (Price, San Rafael and Muddy Creek Watersheds)