Is Smithville Lake by Dam Safe for Swimming?
Smithville Lake by Dam in Clay County, Missouri has a water quality grade of D (Nutrient-rich). Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Water clarity: 3.3 ft visibility. Phosphorus: 37.7 µg/L. Chlorophyll-a (algae): 25.4 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Nutrient-rich) |
| Water Clarity (Secchi Depth) | 3.3 ft |
| Phosphorus | 37.7 μg/L |
| Chlorophyll-a (Algae) | 25.4 μg/L |
| Location | Clay County, Missouri |
How does Smithville Lake by Dam compare?
With an overall water quality grade of D, Smithville Lake by Dam falls below the Missouri state average of Grade C. It ranks #4 of 5 lakes in Clay County by water quality score.
Water clarity (Secchi depth) sits at 3.3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 25.4 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.
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