Jarvis Lake Center
Rolette County, North DakotaView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Mesotrophic
- #2 of 6 in the county
Jarvis Lake Center in Rolette County, North Dakota has a water quality grade of A (Excellent). Water clarity: 7.7 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.9 µg/L.
- Clarity
- 7.7 ft
- Typical in September
- 60°F
- Type
- Mesotrophic
- Trend
- ↓ Declining
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Watch Jarvis Lake Center’s letter
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Jarvis Lake Center is a mesotrophic lake in Rolette County, North Dakota. Water quality is graded A based on 2 sampling years through 2025. Overall water quality is declining over recent sampling years. Compared to the 5 other monitored lakes in Rolette County, Jarvis Lake Center ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2025-09-23. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLow algae
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 A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 7.7 ft. Phosphorus 20 µg/L. Chlorophyll-a 5.9 µg/L. TSI 48. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.7 ft | Not graded |
| Phosphorus | 20 µg/L | Good |
| Chlorophyll-a (Algae) | 5.9 µg/L | Good |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Water Temperature
Jarvis Lake Center typically sits around 60°F at the surface in September. Summer average is about 69°F. Usually warmest in Jul (about 72°F) and coldest in Feb (about 39°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 93 field readings (2010–2025) via the EPA Water Quality Portal. See the full Jarvis Lake Center water temperature breakdown →
Fishing Jarvis Lake Center
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.01 m/yr | 5 |
| Phosphorus | ↓ Declining | +4.1 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +0.58 µg/L/yr | 4 |
County Ranking
Ranked #2 of 6 lakes in Rolette County
Nearby Lakes in Rolette County
Frequently asked questions about Jarvis Lake Center
Where is Jarvis Lake Center?
- Jarvis Lake Center is a lake in Rolette County, North Dakota. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Jarvis Lake Center?
- Jarvis Lake Center in Rolette County, North Dakota has a water quality grade of A (Excellent). Water clarity: 7.7 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.9 µg/L.
Is Jarvis Lake Center safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Jarvis Lake Center?
- Jarvis Lake Center typically sits around 60°F at the surface in September, from 93 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Jarvis Lake Center 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
117 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Turtle Mountain Environmental Office (Tribal)
TURTLEMT117 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
- GS_UNKNOWN
- 10200 H ~ Chlorophyll a-b-c Determination
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.