Happy Tank
Happy Tank in Navajo County, Arizona is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 238 acres.
- Area
- 238 acres
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Why Happy Tank 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 Happy Tank, no water-quality sampling on record for this lake.
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 ADEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Happy Tank is a 238-acre lake in Navajo County, Arizona.
Source: EPA Water Quality Portal sampling records, ADEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Happy Tank
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Happy Tank
Compare lakeside cabins, hotels, and vacation rentals near Happy Tank in Navajo County, Arizona — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Happy Tank
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 238 acres |
No bathymetric survey has been published for Happy Tank, so its depth is not documented here.
Fishing Happy Tank
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Frequently asked questions about Happy Tank
Where is Happy Tank?
- Happy Tank is a lake in Navajo County, Arizona. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Happy Tank?
- Happy Tank in Navajo County, Arizona is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 238 acres.
Is Happy Tank safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Happy Tank is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Happy Tank come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.