Jacomo Lake
Jackson County, Missouri1,221 acresView mapDirections
Missouri DNR publishes the water-quality measurements for Jacomo Lake. Here is what has been measured.
- Eutrophic
- 67 ft max depth
- Public access
Jacomo Lake in Jackson County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 3.3 ft visibility. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 13.6 µg/L. Surface area: 1221 acres.
Jacomo Lake is a 1,221-acre productive, nutrient-rich eutrophic lake in Jackson County, Missouri with an estimated average depth of about 67 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 22 other monitored lakes in Jackson County, Jacomo Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-17. Methodology: how these readings are compared.
Jacomo Lake covers about 1,200 acres in Jackson County. It has 2 public boat landings, so a lakefront rental is not the only way to get a boat on the water. If you are planning to stay, you can search lake houses and cabins around Jacomo Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Jacomo Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Big water1,221 acres
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Jacomo Lake is safe to swim in today is a call for the Missouri Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Jacomo Lake
These are the measurements Missouri DNR publishes for Jacomo Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 3.3 ft of visibility. Phosphorus 20.5 µg/L. Chlorophyll-a 13.6 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20.5µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 13.6µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Jacomo Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Jacomo Lake typically sits around 76°F at the surface in September. Summer average is about 82°F. Usually warmest in Jul (about 84°F) and coldest in Apr (about 61°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (61°F) to its warmest (84°F).
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 →
Lake Details
Max depth
~67 ft est.
Surface area
1,221 acres
Public access
Yes
Listed by Missouri DNR
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Jacomo Lake.
Lake Size & Watershed
Watershed (drainage) area
30 sq mi
HydroLAKES / HydroSHEDS
Shoreline
12.4 mi
HydroLAKES / HydroSHEDS
Elevation
853 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Lake JacomoPublic
- Lake JacomoPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Jacomo Lake
Compare lakeside cabins, hotels, and vacation rentals near Jacomo Lake in Jackson County, Missouri — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Jacomo Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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Planning a trip? Cabins and lodging at Jacomo Lake → · more Missouri lake trips
Follow Jacomo Lake’s readings
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Fishing Jacomo Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+2.29 µg/L/yr5 years
Chlorophyll-a
Improving-0.61 µg/L/yr5 years
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
Nearby Lakes in Jackson County
Frequently asked questions about Jacomo Lake
Where is Jacomo Lake?
- Jacomo Lake is a lake in Jackson County, Missouri. Its water-quality measurements are published by Missouri DNR and shown on this page as reported.
What is the water quality of Jacomo Lake?
- Jacomo Lake in Jackson County, Missouri has water-quality measurements published by Missouri DNR, shown here as reported. Water clarity: 3.3 ft visibility. Phosphorus: 20.5 µg/L. Chlorophyll-a (algae): 13.6 µg/L. Surface area: 1221 acres.
Is Jacomo Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Jacomo Lake?
- Jacomo Lake typically sits around 76°F at the surface in September, from 87 EPA Water Quality Portal field readings (2012–2024). That is a typical value for the month, not a live reading.
How deep is Jacomo Lake?
- No published bathymetric survey covers Jacomo Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 67 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 1221 acres.
Are there boat ramps on Jacomo Lake?
- Jacomo Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Lake Jacomo, Lake Jacomo. Public access is listed as yes.
Can I fish at Jacomo Lake?
- Jacomo Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Missouri's fish and wildlife agency, so check its current regulations before you go.
Explore Jacomo Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
Species activity outlook by water temperature and season
Where to stay at Missouri's top lakes, each with its readings
Missouri's cleanest lakes, ranked on agency measurements
More lakes in Missouri
Other Lakes in Missouri
Eutrophic Lakes in Missouri
Where this data comes from
116 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Univ. of Missouri, Columbia
UMC116 samples · 2020–2024
Analytical methods
- Depth, Secchi disk in meters
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory