Wildhorse Res North Arm Lake
Elko County, NevadaView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Wildhorse Res North Arm Lake in Elko County, Nevada is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 304 µg/L. Chlorophyll-a (algae): 6.7 µg/L.
- Phosphorus
- 304 µg/L
- Chlorophyll-a
- 6.7 µg/L
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Watch Wildhorse Res North Arm Lake’s letter
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Why Wildhorse Res North Arm 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 Wildhorse Res North Arm Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
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 NDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Wildhorse Res North Arm Lake is a lake in Elko County, Nevada.
Source: EPA Water Quality Portal sampling records, NDEP, last sampled 2018-08-29. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Wildhorse Res North Arm Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 304 µg/L. Chlorophyll-a 6.7 µg/L. TSI 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 304 µg/L | Not graded |
| Chlorophyll-a (Algae) | 6.7 µg/L | Not graded |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Wildhorse Res North Arm Lake
Graded lakes near Wildhorse Res North Arm Lake
Wildhorse Res North Arm Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Elko County
Frequently asked questions about Wildhorse Res North Arm Lake
Where is Wildhorse Res North Arm Lake?
- Wildhorse Res North Arm Lake is a lake in Elko County, Nevada. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Wildhorse Res North Arm Lake?
- Wildhorse Res North Arm Lake in Elko County, Nevada is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 304 µg/L. Chlorophyll-a (algae): 6.7 µg/L.
Is Wildhorse Res North Arm Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Wildhorse Res North Arm Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Bureau of Reclamation
1119USBR_WQX2 samples · 2018
Analytical methods
- Phosphorus by Single Reagent Colorimetry
- 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.