Jacomo Lake is a 1,221-acre productive, nutrient-rich eutrophic lake in Jackson County, Missouri. Water quality is graded C based on 3 sampling years through 2024. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 3 public boat landings. Compared to the 26 other monitored lakes in Jackson County, Jacomo Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-17. Grade methodology: LakeGrade methodology.
Watch Jacomo Lake water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 3.3 ft of visibility. Phosphorus level: 20.5 µg/L. Chlorophyll-a: 13.6 µg/L. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | F |
| Phosphorus | 20.5 µg/L | B |
| Chlorophyll-a (Algae) | 13.6 µg/L | C |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,221 acres |
| Public Access | Yes |
Where to stay near Jacomo Lake
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Fishing Jacomo Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.019 m/yr | 5 |
| Phosphorus | ↓ Declining | +2.29 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -0.61 µg/L/yr | 5 |
Recreation & Access
Water Temperature
Jacomo Lake averages about 82°F at the surface in summer, usually warmest in Jul (about 84°F) and coldest in Apr (about 61°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 87 field readings (2012–2024) via the EPA Water Quality Portal. See the full Jacomo Lake water temperature breakdown →
Location
County Ranking
Ranked #3 of 27 lakes in Jackson County
Nearby Lakes in Jackson County
Explore Jacomo Lake across LakeGrade
More Missouri Lake Rankings
Other Grade C Lakes in Missouri
Eutrophic Lakes in Missouri
Compare Jacomo Lake With Nearby Lakes
More records, surveys & data sources
Reservoir Info (USACE NID)
Jacomo Lake is a man-made reservoir impounded by the Lake Jacomo Dam (completed 1956), built primarily for recreation on the EAST FORK LITTLE BLUE RIVER.; earth-type dam, 74 ft tall and 1,550 ft long.
- Surface area
- 1,221 ac
- Normal storage
- 25,730 ac-ft
- Max storage
- 38,620 ac-ft
- Drainage area
- 26.17 sq mi
- Hazard class
- High
- Owner
- JACKSON COUNTY
Source: USACE National Inventory of Dams, NID ID MO10045 · Operator website
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2024-09-17
Monitoring stations: 1