Gardner Lake is a productive, nutrient-rich eutrophic lake in Johnson County, Kansas. Water quality is graded C based on 2 sampling years through 2018. Compared to the 18 other monitored lakes in Johnson County, Gardner Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Kansas DNR, last sampled 2018-08-06. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Very murky, less than 2.3 ft of visibility. Phosphorus level: 17 µg/L. Chlorophyll-a: 43.5 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | F |
| Phosphorus | 17 µg/L | B |
| Chlorophyll-a (Algae) | 43.5 µg/L | F |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Gardner Lake
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Fishing Gardner Lake
Location
County Ranking
Ranked #7 of 19 lakes in Johnson County
Cleaner Lakes Within 30 Miles
Gardner Lake holds Grade C. 3 nearby lakes hold higher grades.
- CNew Olathe LakeJohnson County · 3.7 mi · Higher overall water quality score
- CErnie Miller Park LakeJohnson County · 5.6 mi · Higher overall water quality score
- CLenexa LakeJohnson County · 9.1 mi · Higher overall water quality score
Nearby Lakes in Johnson County
Explore Gardner Lake across LakeGrade
More Kansas Lake Rankings
Other Grade C Lakes in Kansas
Eutrophic 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: 2018-08-06
Monitoring stations: 1