Lake Lancelot
Gladwin County, Michigan250 acresView 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
Lake Lancelot in Gladwin County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9 ft visibility. Surface area: 250 acres.
- Clarity
- 9 ft
- Typical in September
- 72°F
- Area
- 250 acres
- Trend
- ↑ Improving
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Stays near Lake Lancelot
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Watch Lake Lancelot’s letter
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Why Lake Lancelot has no grade
Lake Lancelot 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, Lake Lancelot is Not Rated — not an F. Its 9-foot median from 90 readings collected 2016–2021 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 EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Lancelot is a 250-acre lake in Gladwin County, Michigan. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2021-09-13. 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 Lake Lancelot
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9 ft. TSI 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Water Temperature
Lake Lancelot typically sits around 72°F at the surface in September. Summer average is about 76°F. Usually warmest in Jul (about 78°F) and coldest in May (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 149 field readings (2015–2019) via the EPA Water Quality Portal.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 250 acres |
No bathymetric survey has been published for Lake Lancelot, so its depth is not documented here.
Fishing Lake Lancelot
Water Quality Trend: ↑ Improving
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.853 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.43 µg/L/yr | 7 |
| Chlorophyll-a | ↑ Improving | -0.08 µg/L/yr | 7 |
Reservoir Info (USACE NID)
Lake Lancelot is a man-made reservoir impounded by the Lake Lancelot Dam (completed 1976), built primarily for recreation on the Tributary to Sugar River; earth-type dam, 17 ft tall and 1,400 ft long.
- Surface area
- 250 ac
- Normal storage
- 1,950 ac-ft
- Max storage
- 2,100 ac-ft
- Drainage area
- 4.9 sq mi
- Hazard class
- Low
- Owner
- Gladwin County Drain Commissioner
Source: USACE National Inventory of Dams, NID ID MI00488 · Operator website
Graded lakes near Lake Lancelot
Lake Lancelot has no grade, but these lakes within a short drive do.
Nearby Lakes in Gladwin County
Frequently asked questions about Lake Lancelot
Where is Lake Lancelot?
- Lake Lancelot is a lake in Gladwin County, Michigan. 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 Lake Lancelot?
- Lake Lancelot in Gladwin County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9 ft visibility. Surface area: 250 acres.
Is Lake Lancelot safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lake Lancelot?
- Lake Lancelot typically sits around 72°F at the surface in September, from 149 EPA Water Quality Portal field readings (2015–2019). That is a typical value for the month, not a live reading.
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Where this data comes from
90 measurements from 1 monitoring station, 2016–2021. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS90 samples · 2016–2021
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.