Huerfano County Lake Quality
Colorado, 2 lakes, average grade D (Poor)
Only 2 lakes in Huerfano County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. On average, Huerfano County lakes grade D, with phosphorus loading and reduced clarity showing up across most of the dataset.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Horseshoe Reservoir (D) is the cleanest in the county.
Quick Answers for Huerfano County
Planning a trip? Check special fishing regulations for Horseshoe Reservoir — or check the official Colorado fishing regulations.
All Lakes in Huerfano County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Horseshoe Reservoir | D | 3.9 ft | - |
| 2 | Martin Lake | D | 4.8 ft | - |
Other Counties in Colorado
See how Huerfano County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 12 states.
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Source: EPA National Aquatic Resource Surveys, 2026.