West Stump Lake
Nelson County, North DakotaView mapDirections
Not enough samples to grade — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. No letter yet. Here is what we do have.
- Public access
- Limited data
West Stump Lake in Nelson County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Chlorophyll-a (algae): 20.1 µg/L.
- Clarity
- 9.8 ft
- Typical in August
- 61°F
- Chlorophyll-a
- 20.1 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch West Stump Lake’s letter
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Why West Stump Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For West Stump Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by NDDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
West Stump Lake is a lake in Nelson County, North Dakota. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2025-10-14. Grade methodology: LakeQuality methodology.
What West Stump Lake is good for
From access and monitoring records, not editorial picks.
- Clear water9.8 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for West Stump Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9.8 ft. Chlorophyll-a 20.1 µg/L. TSI 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 20.1 µg/L | Not graded |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
West Stump Lake typically sits around 61°F at the surface in August. Summer average is about 62°F. Usually warmest in Jul (about 69°F) and coldest in May (about 44°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 18 field readings (2020–2025) via the EPA Water Quality Portal. See the full West Stump Lake water temperature breakdown →
Fishing West Stump Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.16 m/yr | 2 |
Graded lakes near West Stump Lake
West Stump Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Nelson County
Frequently asked questions about West Stump Lake
Where is West Stump Lake?
- West Stump Lake is a lake in Nelson County, North Dakota. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for West Stump Lake?
- West Stump Lake in Nelson County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Chlorophyll-a (algae): 20.1 µg/L.
Is West Stump Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
What is the water temperature of West Stump Lake?
- West Stump Lake typically sits around 61°F at the surface in August, from 18 EPA Water Quality Portal field readings (2020–2025). That is a typical value for the month, not a live reading.
Explore West Stump Lake across LakeQuality
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Where this data comes from
17 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_WQX17 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.