Lamar City Lk. Nr. Dam Lake is a 150-acre productive, nutrient-rich eutrophic lake in Barton County, Missouri. Water quality is graded F based on 3 sampling years through 2020. Compared to the 5 other monitored lakes in Barton County, Lamar City Lk. Nr. Dam Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-11-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2 ft of visibility. Phosphorus level: 66 µg/L. Chlorophyll-a: 39.1 µg/L. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | 66 µg/L | D |
| Chlorophyll-a (Algae) | 39.1 µg/L | F |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 150 acres |
Where to stay near Lamar City Lk. Nr. Dam Lake
Compare lakeside cabins, hotels, and vacation rentals near Lamar City Lk. Nr. Dam Lake in Barton 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.
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Fishing Lamar City Lk. Nr. Dam Lake
Water Temperature
Lamar City Lk. Nr. Dam Lake averages about 83°F at the surface in summer, usually warmest in Jul (about 85°F) and coldest in Apr (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 88 field readings (2010–2020) via the EPA Water Quality Portal. See the full Lamar City Lk. Nr. Dam Lake water temperature breakdown →
Location
County Ranking
Ranked #3 of 6 lakes in Barton County
Nearby Lakes in Barton County
Explore Lamar City Lk. Nr. Dam Lake across LakeGrade
More Missouri Lake Rankings
Other Grade F Lakes in Missouri
Vernon County · Clarity: 1.5 ft
Henry County · Clarity: 0.6 ft
Bates County · Clarity: 0.9 ft
Stone County · Clarity: 2.6 ft
Hickory County · Clarity: 1.2 ft
Hickory County · Clarity: 1 ft
Eutrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Lamar City Lk. Nr. Dam Lake is a man-made reservoir impounded by the Lamar Lake Dam (completed 1955), built primarily for recreation on the TR TO NORTH FORK SPRING RIVER; earth-type dam, 26 ft tall.
- Surface area
- 150 ac
- Normal storage
- 1,050 ac-ft
- Max storage
- 2,086 ac-ft
- Drainage area
- 3,100 sq mi
- Hazard class
- High
- Owner
- CITY OF LAMAR
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID MO20002 · Operator website · Matched by proximity (0.09 km)
EPA Impairment Status
Lamar City Lk. Nr. Dam Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MO_7356.00 · Official waterbody report · Matched by proximity (0.89 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
12 EPA-permitted facilities operate within about 5 miles of Lamar City Lk. Nr. Dam Lake under Clean Water Act (NPDES) discharge permits. 5 facilities have a reported Clean Water Act violation in the past three years.
- Lamar WwtfLamar · 1.5 mi away · NPDES MO0044172Recent violation
- Living Word Estates WwtpLamar · 2.4 mi away · NPDES MO0096270Recent violation
- Super 8 Lamar WwtpLamar · 2.4 mi away · NPDES MO0120456Recent violation
- Blue Top Motel And CafeLamar · 2.4 mi away · NPDES MO0034410Recent violation
- Lamar Closed Sanitary LandfillLamar · 3.1 mi away · NPDES MO0110272Recent violation
- Epoch Composite Products,Lamar · 0.9 mi away · NPDES MO0129879
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-11-05
Monitoring stations: 1