Cedar Lake is a highly nutrient-loaded hypereutrophic lake in Johnson County, Kansas. Water quality is graded F based on 2 sampling years through 2021. Compared to the 18 other monitored lakes in Johnson County, Cedar Lake ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, Kansas DNR, last sampled 2021-06-03. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 1.6 ft of visibility. Phosphorus level: 116.5 µg/L. Chlorophyll-a: 41 µg/L. Trophic State Index: 70.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | F |
| Phosphorus | 116.5 µg/L | F |
| Chlorophyll-a (Algae) | 41 µg/L | F |
| Trophic State Index (TSI) | 70 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Cedar Lake
Location
County Ranking
Ranked #13 of 19 lakes in Johnson County
Cleaner Lakes Within 30 Miles
Cedar Lake holds Grade F. 5 nearby lakes hold higher grades.
- CNew Olathe LakeJohnson County · 2.9 mi · Two grade letters higher (F → C)
- CErnie Miller Park LakeJohnson County · 3.3 mi · Two grade letters higher (F → C)
- CLenexa LakeJohnson County · 8.2 mi · Two grade letters higher (F → C)
- COlathe LakeJohnson County · 3 mi · Two grade letters higher (F → C)
- CGardner LakeJohnson County · 4.8 mi · Two grade letters higher (F → C)
Nearby Lakes in Johnson County
Explore Cedar Lake across LakeGrade
More Kansas Lake Rankings
Other Grade F Lakes in Kansas
Douglas County · Clarity: 1 ft
Wyandotte County · Very Poor
Wyandotte County · Clarity: 2.8 ft
Linn County · Clarity: 0.6 ft
Atchison County · Clarity: 1.7 ft
Shawnee County · Clarity: 1.2 ft
Hypereutrophic Lakes in Kansas
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-06-03
Monitoring stations: 2