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LakeQuality
Late afternoon sun over Slim Lake, scattering a bright path across wind-textured water
B

Crawford County Lake Quality

Kansas, 2 lakes, average grade B (Good)

Crawford County holds 2 monitored lakes. With a sample that small the county-level summary describes those specific waters, not necessarily every water body in the county. Every one of those lakes carries an A–F grade, so the county-level summary covers the full set rather than a monitored subset. With an average grade of B, Crawford County sits comfortably above the Kansas median.

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 Lake Crawford (B); the most-stressed is Lake Crawford (B).

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All Lakes in Crawford County

2 lakes2 graded lakes

#LakeGradeClarityPhosphorusAlgaeTrophicAccess
1BLake CrawfordCrawfordB5.1 ft20 µg/L12.7 µg/LNo recent samples✓ Public
2BBone Creek LakeCrawfordB5.8 ft20 µg/L13 µg/LNo recent samplesNot recorded

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See how Crawford County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all United States (49 states), Canada (Ontario, Québec, Nova Scotia, British Columbia and Newfoundland and Labrador), and 38 other country hubs..

Source: EPA National Aquatic Resource Surveys, 2026.