Thunderbird Lake Indianhills
Cleveland County, OklahomaView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Thunderbird Lake Indianhills in Cleveland County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 68 µg/L.
- Phosphorus
- 68 µg/L
- Trend
- ↓ Declining
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Stays near Thunderbird Lake Indianhills
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Watch Thunderbird Lake Indianhills’s letter
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Why Thunderbird Lake Indianhills 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 Thunderbird Lake Indianhills, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
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 ODEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Thunderbird Lake Indianhills is a lake in Cleveland County, Oklahoma. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, ODEQ, last sampled 2016-09-29. 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 Thunderbird Lake Indianhills
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 68 µg/L. TSI 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 68 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Thunderbird Lake Indianhills
Water Quality Trend: ↓ Declining
Based on 11 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.823 m/yr | 11 |
| Phosphorus | ↓ Declining | +2.52 µg/L/yr | 7 |
| Chlorophyll-a | ↓ Declining | +0.68 µg/L/yr | 7 |
Graded lakes near Thunderbird Lake Indianhills
Thunderbird Lake Indianhills has no grade, but these lakes within a short drive do.
Nearby Lakes in Cleveland County
Frequently asked questions about Thunderbird Lake Indianhills
Where is Thunderbird Lake Indianhills?
- Thunderbird Lake Indianhills is a lake in Cleveland County, Oklahoma. 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 Thunderbird Lake Indianhills?
- Thunderbird Lake Indianhills in Cleveland County, Oklahoma is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 68 µg/L.
Is Thunderbird Lake Indianhills safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Thunderbird Lake Indianhills across LakeQuality
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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
- Absentee Shawnee Tribe of Oklahoma (Tribal)
ABSHAWNEE1 sample · 2016
Analytical methods
- Phosphorus by Two Reagent Colorimetry
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.