Concho Lake is a highly nutrient-loaded hypereutrophic lake in Apache County, Arizona. Water quality is graded F based on 1 sampling years through 2022. Compared to the 10 other monitored lakes in Apache County, Concho Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, Arizona DNR, last sampled 2022-04-18. 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 2.5 ft of visibility. Phosphorus level: 170 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | F |
| Phosphorus | 170 µg/L | F |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
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Fishing Concho Lake
Location
County Ranking
Ranked #8 of 11 lakes in Apache County
Cleaner Lakes Within 30 Miles
Concho Lake holds Grade F. 2 nearby lakes hold higher grades.
Nearby Lakes in Apache County
Explore Concho Lake across LakeGrade
More Arizona Lake Rankings
Other Grade F Lakes in Arizona
Hypereutrophic Lakes in Arizona
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: 2022-04-18
Monitoring stations: 1