Mayland Pond
Big Horn County, Wyoming34 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Mayland Pond. Here is what has been measured.
- Limited data
Mayland Pond in Big Horn County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 60 µg/L. Surface area: 34 acres.
Mayland Pond is a 34-acre lake in Big Horn County, Wyoming. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2016-09-26. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Mayland Pond is safe to swim in today is a call for the Wyoming Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mayland Pond
These are the measurements Wyoming DEQ publishes for Mayland Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 60 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 60µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Mayland Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
34 acres
No bathymetric survey has been published for Mayland Pond, so its depth is not documented here.
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Fishing Mayland Pond
Water quality readings over time
2 seasons of samples on record (2015–2016). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Worsening+5 µg/L/yr2 years
Reservoir Info (USACE NID)
Mayland Pond is a man-made reservoir impounded by the Bench Canal (completed 1969), built primarily for irrigation on the Greybull River; earth-type dam, 35 ft tall and 1,000 ft long.
- Surface area
- 34 ac
- Normal storage
- 299 ac-ft
- Max storage
- 497 ac-ft
- Drainage area
- 1 sq mi
- Hazard class
- Low
- Owner
- BENCH CANAL COMPANY
Source: USACE National Inventory of Dams, NID ID WY01086 · Operator website · Matched by proximity (0.05 km)
Nearby Lakes in Big Horn County
Frequently asked questions about Mayland Pond
Where is Mayland Pond?
- Mayland Pond is a lake in Big Horn County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Mayland Pond?
- Mayland Pond in Big Horn County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 60 µg/L. Surface area: 34 acres.
Is Mayland Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
1 measurement from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED1 sample · 2016
Analytical methods
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.