Del Norte County Lake Quality
California, 1 lake, average grade D (Nutrient-rich)
Only 1 lakes in Del Norte 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. The county-wide average grade is D — water quality issues are persistent across most of the monitored basins. 0 lakes fall into the F bracket outright.
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 Pond (D); the most-stressed is Pond (D).
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Quick Answers for Del Norte County
Planning a trip? Check special fishing regulations for Pond — or check the official California fishing regulations.
All Lakes in Del Norte County
1 lake1 graded lake
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Access |
|---|---|---|---|---|---|---|---|
| 1 | DPondDel Norte | D | No recent samples | 59.2 µg/L | No recent samples | No recent samples | Not recorded |
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Other Counties in California
See how Del Norte 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.