Waukomis Lake is a 82-acre productive, nutrient-rich eutrophic lake in Platte County, Missouri. Water quality is graded C based on 3 sampling years through 2022. Overall water quality is declining over recent sampling years. Compared to the 2 other monitored lakes in Platte County, Waukomis Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2022-09-24. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 4.7 ft. Phosphorus level: 26 µg/L. Chlorophyll-a: 7.2 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.7 ft | D |
| Phosphorus | 26 µg/L | B |
| Chlorophyll-a (Algae) | 7.2 µg/L | B |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 82 acres |
Where to stay near Waukomis Lake
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Fishing Waukomis Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.035 m/yr | 3 |
| Phosphorus | ↓ Declining | +3 µg/L/yr | 3 |
| Chlorophyll-a | ↓ Declining | +0.85 µg/L/yr | 3 |
Water Temperature
Waukomis Lake averages about 82°F at the surface in summer, usually warmest in Jul (about 83°F) and coldest in Apr (about 60°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 70 field readings (2010–2022) via the EPA Water Quality Portal. See the full Waukomis Lake water temperature breakdown →
Location
County Ranking
Ranked #2 of 3 lakes in Platte County
Cleaner Lakes Within 30 Miles
Waukomis Lake holds Grade C. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Platte County
Explore Waukomis Lake across LakeGrade
More Missouri Lake Rankings
Other Grade C Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Waukomis Lake is a man-made reservoir impounded by the Lake Waukomis Dam (completed 1968), built primarily for recreation on the TR LINE CREEK; earth-type dam, 68 ft tall and 785 ft long.
- Surface area
- 82 ac
- Normal storage
- 2,292 ac-ft
- Max storage
- 2,292 ac-ft
- Drainage area
- 2.04 sq mi
- Hazard class
- High
- Owner
- LAKE WAUKOMIS HOME ASSN
Source: USACE National Inventory of Dams, NID ID MO10691 · Operator website
EPA Impairment Status
Waukomis Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7072.00 · Official waterbody report
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2022-09-24
Monitoring stations: 2