Arroda Lake
Oliver County, North Dakota43 acresView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from B at the last regrade
- Mesotrophic
- #3 of 3 in the county
- Limited data
Arroda Lake in Oliver County, North Dakota has a water quality grade of C (Fair). Water clarity: 6.7 ft visibility. Phosphorus: 26.5 µg/L. Chlorophyll-a (algae): 3 µg/L. Surface area: 43.4 acres.
- Clarity
- 6.7 ft
- Typical in August
- 64°F
- Area
- 43 acres
- Type
- Mesotrophic
- Phosphorus
- 26.5 µg/L
- Chlorophyll-a
- 3 µg/L
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Watch Arroda Lake’s letter
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Arroda Lake is a 43-acre mesotrophic lake in Oliver County, North Dakota. Water quality is graded C based on 1 sampling years through 2023. Compared to the 2 other monitored lakes in Oliver County, Arroda Lake ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2023-10-17. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
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.
The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Moderate clarity, visible to about 6.7 ft. Phosphorus 26.5 µg/L. Chlorophyll-a 3 µg/L. TSI 48. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.7 ft | Not graded |
| Phosphorus | 26.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 3 µg/L | Not graded |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Water Temperature
Arroda Lake typically sits around 64°F at the surface in August. Summer average is about 65°F. Usually warmest in Jun (about 66°F) and coldest in Oct (about 50°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 12 field readings (2023–2023) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 43 acres |
No bathymetric survey has been published for Arroda Lake, so its depth is not documented here.
Fishing Arroda Lake
Reservoir Info (USACE NID)
Arroda Lake is a man-made reservoir impounded by the Daub Dam (completed 1971), built primarily for recreation on the Missouri-TR; earth-type dam, 79 ft tall and 1,620 ft long.
- Surface area
- 43.4 ac
- Normal storage
- 732 ac-ft
- Max storage
- 1,346 ac-ft
- Drainage area
- 6.2 sq mi
- Hazard class
- Significant
- Owner
- ND Game & Fish
Source: USACE National Inventory of Dams, NID ID ND00372 · Operator website
County Ranking
Ranked #3 of 3 lakes in Oliver County
Nearby Lakes in Oliver County
Frequently asked questions about Arroda Lake
Where is Arroda Lake?
- Arroda Lake is a lake in Oliver County, North Dakota. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Arroda Lake?
- Arroda Lake in Oliver County, North Dakota has a water quality grade of C (Fair). Water clarity: 6.7 ft visibility. Phosphorus: 26.5 µg/L. Chlorophyll-a (algae): 3 µg/L. Surface area: 43.4 acres.
Is Arroda Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Arroda Lake?
- Arroda Lake typically sits around 64°F at the surface in August, from 12 EPA Water Quality Portal field readings (2023–2023). That is a typical value for the month, not a live reading.
Explore Arroda Lake across LakeQuality
Species activity outlook by water temperature and season
Where to stay at North Dakota's top lakes, each with its grade
Moderate nutrients, good water quality
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Where this data comes from
20 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX20 samples · 2023
Analytical methods
- Phosphorus by Colorimetry
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
- 4500 NO3 E ~ Nitrate in Water- Cadmium Reduction
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
Depth, fish, and access data from North Dakota Game & Fish