Great Salt Lake
Box Elder County, UtahView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Limited data
Great Salt Lake in Box Elder County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility.
- Clarity
- 10.5 ft
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Stays near Great Salt Lake
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Watch Great Salt Lake’s letter
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Why Great Salt Lake has no grade
Great Salt Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Great Salt Lake is Not Rated — not an F. Its 10.5-foot median from 1 readings collected 2020 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by Utah DWQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Great Salt Lake is a lake in Box Elder County, Utah.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2020-07-06. Grade methodology: LakeQuality methodology.
What Great Salt Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.5 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 Great Salt Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 10.5 ft. TSI 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Great Salt Lake
Graded lakes near Great Salt Lake
Great Salt Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Box Elder County
Frequently asked questions about Great Salt Lake
Where is Great Salt Lake?
- Great Salt Lake is a lake in Box Elder County, Utah. 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 Great Salt Lake?
- Great Salt Lake in Box Elder County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.5 ft visibility.
Is Great Salt Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Great Salt Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 2020
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.