El Dorado County Lake Quality
California, 3 lakes — no lake here has enough monitoring data for a grade
El Dorado County has 3 graded lakes — a thin enough sample that one or two stressed lakes can move the county average noticeably. Use the per-lake pages below for what actually matters.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Tahoekeyslagoons.Lucernect.F Lake (—); the most-stressed is Tahoekeyslagoons.Lucernect.F Lake (—).
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Quick Answers for El Dorado County
Planning a trip? Check special fishing regulations for Tahoekeyslagoons.Lucernect.F Lake — or check the official California fishing regulations.
All Lakes in El Dorado County
3 lakes · 0 graded, 3 not rated0 graded lakes · 3 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| NRTahoekeyslagoons.Lucernect.F LakeEl Dorado | NR | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| NRTahoekeyslagoons.Slalomct.H LakeEl Dorado | NR | No recent samples | 29 µg/L | No recent samples | No recent samples | Not recorded | |
| NRTahoekeyslagoons.Traverse.I LakeEl Dorado | NR | No recent samples | 21 µg/L | No recent samples | No recent samples | Not recorded |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
Which lake suits how you actually use one?
Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in California
See how El Dorado County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 49 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.