Mozingo Lake Between Arms is a 1,009-acre productive, nutrient-rich eutrophic lake in Nodaway County, Missouri. Water quality is graded C 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. Compared to the 4 other monitored lakes in Nodaway County, Mozingo Lake Between Arms ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-07-30. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Murky, only visible to about 3.5 ft. Phosphorus level: 37.7 µg/L. Chlorophyll-a: 18.6 µg/L. Trophic State Index: 58.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.5 ft | D |
| Phosphorus | 37.7 µg/L | C |
| Chlorophyll-a (Algae) | 18.6 µg/L | C |
| Trophic State Index (TSI) | 58 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,009 acres |
| Public Access | Yes |
Where to stay near Mozingo Lake Between Arms
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Fishing Mozingo Lake Between Arms
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.085 m/yr | 4 |
| Phosphorus | ↑ Improving | -2.87 µg/L/yr | 5 |
| Chlorophyll-a | ↑ Improving | -5.88 µg/L/yr | 5 |
Water Temperature
Mozingo Lake Between Arms averages about 79°F at the surface in summer, usually warmest in Aug (about 82°F) and coldest in May (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 61 field readings (2010–2024) via the EPA Water Quality Portal. See the full Mozingo Lake Between Arms water temperature breakdown →
Location
County Ranking
Ranked #2 of 5 lakes in Nodaway County
Nearby Lakes in Nodaway County
Explore Mozingo Lake Between Arms across LakeGrade
More Missouri Lake Rankings
Other Grade C Lakes in Missouri
Eutrophic Lakes in Missouri
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More records, surveys & data sources
Reservoir Info (USACE NID)
Mozingo Lake Between Arms is a man-made reservoir impounded by the Mozingo Creek Dam (completed 1992), built primarily for water supply on the MOZINGO CREEK; earth-type dam, 77 ft tall and 2,735 ft long.
- Surface area
- 1,009 ac
- Normal storage
- 1,275 ac-ft
- Max storage
- 1,275 ac-ft
- Drainage area
- 20.92 sq mi
- Hazard class
- High
- Owner
- CITY OF MARYVILLE
All listed purposes: Water Supply;Recreation;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID MO12277 · Operator website · Matched by proximity (0.16 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Mozingo Lake Between Arms under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Ravenwood WwtfRavenwood · 5 mi away · NPDES MO0021458Recent violation
- Mozingo Lake Recreation AreaMaryville · 0.3 mi away · NPDES MO0129194
- Aeci Nodaway Power PlantConception Junction · 4.3 mi away · NPDES MO0122963
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-07-30
Monitoring stations: 1