Pomme de Terre L. Central Arm Lake
Hickory County, MissouriView mapDirections
Nutrients and algae sit mid-range for this region.
↑ up from D at the last regrade
- Eutrophic
- Impaired · Algal growth
- #2 of 6 in the county
- Public access
Pomme de Terre L. Central Arm Lake in Hickory County, Missouri has a water quality grade of C (Fair). Water clarity: 3 ft visibility. Phosphorus: 30.5 µg/L. Chlorophyll-a (algae): 11.8 µg/L.
- Clarity
- 3 ft
- Typical in September
- 79°F
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- Yes
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Pomme de Terre L. Central Arm Lake is a productive, nutrient-rich eutrophic lake in Hickory County, Missouri. Water quality is graded C based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 5 other monitored lakes in Hickory County, Pomme de Terre L. Central Arm Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-15. Grade methodology: LakeQuality methodology.
What Pomme de Terre L. Central Arm Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
Swimming Safety
Grade onlyBacteria B
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
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: C (Fair)
Very murky, less than 3 ft of visibility. Phosphorus 30.5 µg/L. Chlorophyll-a 11.8 µg/L. TSI 57. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3 ft | Not graded |
| Phosphorus | 30.5 µg/L | Fair |
| Chlorophyll-a (Algae) | 11.8 µg/L | Fair |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
→ Pomme de Terre L. Central Arm Lake water level: the live USGS gauge reading
Water Temperature
Pomme de Terre L. Central Arm Lake typically sits around 79°F at the surface in September. Summer average is about 84°F. 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 →
Recreation & Access
- Pomme De Terre Lake State ParkPublic
- Highway 83 MarinaSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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 |
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)
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.
County Ranking
Ranked #2 of 6 lakes in Hickory County
Nearby Lakes in Hickory County
Frequently asked questions about Pomme de Terre L. Central Arm Lake
Where is Pomme de Terre L. Central Arm Lake?
- Pomme de Terre L. Central Arm Lake is a lake in Hickory County, Missouri. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Pomme de Terre L. Central Arm Lake?
- Pomme de Terre L. Central Arm Lake in Hickory County, Missouri has a water quality grade of C (Fair). Water clarity: 3 ft visibility. Phosphorus: 30.5 µg/L. Chlorophyll-a (algae): 11.8 µg/L.
Is Pomme de Terre L. Central Arm Lake safe to swim in?
- 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. That works out to a bacteria swim-safety grade of B — a historical summary of past testing, not a current reading. Pomme de Terre L. Central Arm Lake has a water quality grade of C (Fair). Bacteria levels can spike quickly after heavy rain, so always check Missouri's current beach and health-department advisories before you swim.
What is the water temperature of Pomme de Terre L. Central Arm Lake?
- Pomme de Terre L. Central Arm Lake typically sits around 79°F at the surface in September, from 64 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
Are there boat ramps on Pomme de Terre L. Central Arm Lake?
- Pomme de Terre L. Central Arm Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Pomme De Terre Lake State Park, Highway 83 Marina. Public access is listed as yes.
Explore Pomme de Terre L. Central Arm Lake across LakeQuality
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Other Grade C Lakes in Missouri
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Where this data comes from
48 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
UMC48 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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory