Willard North Marina 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
Willard North Marina Lake in Box Elder County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.8 ft visibility.
- Clarity
- 1.8 ft
- Trend
- → Stable
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Watch Willard North Marina Lake’s letter
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Why Willard North Marina Lake has no grade
Willard North Marina 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, Willard North Marina Lake is Not Rated — not an F. Its 1.8-foot median from 25 readings collected 2012–2016 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.
Willard North Marina Lake is a lake in Box Elder County, Utah. Phosphorus level is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2016-07-14. 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 Willard North Marina Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1.8 ft of visibility. TSI 68.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 68 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Willard North Marina Lake
Water Quality Trend: → Stable
Based on 10 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.006 m/yr | 10 |
| Phosphorus | ↓ Declining | +1.91 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -1.87 µg/L/yr | 4 |
Graded lakes near Willard North Marina Lake
Willard North Marina Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Box Elder County
Frequently asked questions about Willard North Marina Lake
Where is Willard North Marina Lake?
- Willard North Marina Lake is a lake in Box Elder County, Utah. 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 Willard North Marina Lake?
- Willard North Marina Lake in Box Elder County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.8 ft visibility.
Is Willard North Marina Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
25 measurements from 1 monitoring station, 2012–2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- UC Region of USBOR
UC_REGION_USBOR_WQX25 samples · 2012–2016
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.