East Devils Lake
Ramsey County, North DakotaView mapDirections
Nutrients and algae run above the regional average.
↓ down from C at the last regrade
- Eutrophic
- #7 of 8 in the county
- Limited data
East Devils Lake in Ramsey County, North Dakota has a water quality grade of D (Nutrient-rich). Water clarity: 6.6 ft visibility. Phosphorus: 232 µg/L. Chlorophyll-a (algae): 16.2 µg/L.
- Clarity
- 6.6 ft
- Typical in August
- 64°F
- Type
- Eutrophic
- Phosphorus
- 232 µg/L
- Chlorophyll-a
- 16.2 µg/L
- Trend
- ↓ Declining
Stays via Stay22
Stays near East Devils Lake
Compare lakeside cabins, hotels, and vacation rentals near East Devils Lake in Ramsey County, North Dakota — 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around East Devils Lake are listed below.
Top-rated places to stay near East Devils Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
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Watch East Devils Lake’s letter
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East Devils Lake is a productive, nutrient-rich eutrophic lake in Ramsey County, North Dakota. Water quality is graded D based on 2 sampling years through 2025. Overall water quality is declining over recent sampling years. Compared to the 7 other monitored lakes in Ramsey County, East Devils Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2025-10-09. 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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 6.6 ft. Phosphorus 232 µg/L. Chlorophyll-a 16.2 µg/L. TSI 64. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.6 ft | Not graded |
| Phosphorus | 232 µg/L | Not graded |
| Chlorophyll-a (Algae) | 16.2 µg/L | Fair |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
East Devils Lake typically sits around 64°F at the surface in August. Summer average is about 66°F. Usually warmest in Jul (about 67°F) and coldest in Feb (about 32°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 131 field readings (2010–2025) via the EPA Water Quality Portal. See the full East Devils Lake water temperature breakdown →
Fishing East Devils Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.131 m/yr | 5 |
| Phosphorus | ↓ Declining | +53 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -1.58 µg/L/yr | 4 |
County Ranking
Ranked #7 of 8 lakes in Ramsey County
Nearby Lakes With Higher Grades
East Devils Lake holds Grade D. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Ramsey County
Frequently asked questions about East Devils Lake
Where is East Devils Lake?
- East Devils Lake is a lake in Ramsey County, North Dakota. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for East Devils Lake?
- East Devils Lake in Ramsey County, North Dakota has a water quality grade of D (Nutrient-rich). Water clarity: 6.6 ft visibility. Phosphorus: 232 µg/L. Chlorophyll-a (algae): 16.2 µg/L.
Is East Devils Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
What is the water temperature of East Devils Lake?
- East Devils Lake typically sits around 64°F at the surface in August, from 131 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore East Devils Lake across LakeQuality
Species activity outlook by water temperature and season
Top lakes and where to stay in the Devils Lake Region area
Where to stay at North Dakota's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
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More North Dakota Lake Rankings
Other Grade D Lakes in North Dakota
Eutrophic Lakes in North Dakota
Where this data comes from
67 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX67 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 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.