Pomme de Terre L. Central Arm Lake is a productive, nutrient-rich eutrophic lake in Hickory County, Missouri. Water quality is graded D based on 3 sampling years through 2024. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 9 other monitored lakes in Hickory County, Pomme de Terre L. Central Arm Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-15. Grade methodology: LakeGrade methodology.
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Swimming Safety
Based on E. coli testing, Pomme de Terre L. Central Arm Lake rarely exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 3% of 266 samples across 8 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Missouri’s current beach and health-department advisories before swimming.
Water Quality Grade: D, Poor
Very murky, less than 3 ft of visibility. Phosphorus level: 30.5 µg/L. Chlorophyll-a: 11.8 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | F |
| Phosphorus | 30.5 µg/L | C |
| Chlorophyll-a (Algae) | 11.8 µg/L | C |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Pomme de Terre L. Central Arm Lake
Compare lakeside cabins, hotels, and vacation rentals near Pomme de Terre L. Central Arm Lake in Hickory 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 Pomme de Terre L. Central Arm Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.058 m/yr | 4 |
| Phosphorus | ↑ Improving | -3.41 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -1.85 µg/L/yr | 4 |
Recreation & Access
Water Temperature
Pomme de Terre L. Central Arm Lake averages about 84°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 64 field readings (2010–2024) via the EPA Water Quality Portal. See the full Pomme de Terre L. Central Arm Lake water temperature breakdown →
Location
County Ranking
Ranked #3 of 10 lakes in Hickory County
Cleaner Lakes Within 30 Miles
Pomme de Terre L. Central Arm Lake holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Hickory County
Explore Pomme de Terre L. Central Arm Lake across LakeGrade
More Missouri Lake Rankings
Other Grade D Lakes in Missouri
Eutrophic Lakes in Missouri
More records, surveys & data sources
EPA Impairment Status
Pomme de Terre L. Central Arm 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_7238.00 · Official waterbody report · Matched by proximity (2.35 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Pomme de Terre L. Central Arm Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Pomme De Terre Sp - Pittsburg WwtfPittsburg · 1.2 mi away · NPDES MO0128805Recent violation
- Whiteside Hidden AcresPittsburg · 0.2 mi away · NPDES MO0120511
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
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2024-09-15
Monitoring stations: 1