Lamar City Lk. Nr. Upper End Lake is a highly nutrient-loaded hypereutrophic 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. Upper End Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-11-04. 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 1.8 ft of visibility. Phosphorus level: 105.7 µg/L. Chlorophyll-a: 63.5 µg/L. Trophic State Index: 70.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 ft | F |
| Phosphorus | 105.7 µg/L | F |
| Chlorophyll-a (Algae) | 63.5 µg/L | F |
| Trophic State Index (TSI) | 70 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Lamar City Lk. Nr. Upper End Lake
Compare lakeside cabins, hotels, and vacation rentals near Lamar City Lk. Nr. Upper End 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. Upper End Lake
Water Temperature
Lamar City Lk. Nr. Upper End Lake averages about 85°F at the surface in summer, usually warmest in Jul (about 87°F) and coldest in Oct (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 36 field readings (2016–2020) via the EPA Water Quality Portal. See the full Lamar City Lk. Nr. Upper End Lake water temperature breakdown →
Location
County Ranking
Ranked #6 of 6 lakes in Barton County
Cleaner Lakes Within 30 Miles
Lamar City Lk. Nr. Upper End Lake holds Grade F. 5 nearby lakes hold higher grades.
- BStockton State Park Marina LakeCedar County · 29.2 mi · Two grade letters higher (F → B)
- BStockton LakeCedar County · 29.4 mi · Two grade letters higher (F → B)
- FLamar City Lk. East Arm LakeBarton County · 0.4 mi · Higher overall water quality score
- FLamar City Lk. Up Northern Arm LakeBarton County · 0.5 mi · Higher overall water quality score
- FLamar City Lk. South Arm LakeBarton County · 0.6 mi · Higher overall water quality score
Nearby Lakes in Barton County
Explore Lamar City Lk. Nr. Upper End Lake across LakeGrade
Species activity outlook by water temperature and season
Where to stay at Missouri's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
Missouri's cleanest and most-polluted lakes, ranked
More Missouri Lake Rankings
Other Grade F Lakes in Missouri
Vernon County · Clarity: 1.5 ft
Henry County · Clarity: 0.6 ft
Hickory County · Clarity: 1.2 ft
Stone County · Clarity: 2.6 ft
Hickory County · Clarity: 1 ft
Bates County · Clarity: 0.9 ft
Hypereutrophic Lakes in Missouri
More records, surveys & data sources
EPA Impairment Status
Lamar City Lk. Nr. Upper End 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 (0.77 km)
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: 2020-11-04
Monitoring stations: 1