Lakeside Lake is a productive, nutrient-rich eutrophic lake in Pima County, Arizona. Water quality is graded D based on 1 sampling years through 2026. Compared to the 3 other monitored lakes in Pima County, Lakeside Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Arizona DNR, last sampled 2026-04-02. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 1.3 ft of visibility. Phosphorus level: 70 µg/L. Trophic State Index: 69.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.3 ft | F |
| Phosphorus | 70 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 69 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lakeside Lake
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Fishing Lakeside Lake
Location
County Ranking
Ranked #2 of 4 lakes in Pima County
Nearby Lakes in Pima County
Explore Lakeside Lake across LakeGrade
More Arizona Lake Rankings
Other Grade D Lakes in Arizona
Eutrophic 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: 2026-04-02
Monitoring stations: 1