Oklahoma lake · tribal assessment record
Arbuckle Lake
Assessment decisions reported by The Chickasaw Nation to EPA under Clean Water Act sections 303(d) and 305(b), last assessed in the 2025 reporting cycle.
- 2,350
- Assessed acres
- Lake
- Water type
This waterbody in one line
Arbuckle Lake, a lake in Oklahoma, is assessed as fully supporting its designated uses, with no impairment causes listed in the Chickasaw Nation's most recent Integrated Report cycle (2025). By assessed acreage it sits among the largest 5% by assessed acreage nationally (38,628 lakes); its impairment list is shorter than on half of assessed lakes (0 listed causes). Aquatic life is assessed as fully supporting.
- Fully Supporting
- overall status
- P97
- Assessed size nationally
- P51
- Shorter cause list
- Fully Supporting
- aquatic life
Assessment verdicts are the Chickasaw Nation's decisions as reported to EPA ATTAINS; PlainLakes renders them without modification.
A composite of this record's EPA ATTAINS designated-use verdicts, filed impairment count, and assessment currency, weighted and benchmarked against the national corpus of assessed active waterbodies. This is a water-quality standing, not a human-recreation or property-value judgment, and dimensions with no filed verdict drop out rather than count against the score.
Reading Arbuckle Lake's filed record
Paragraphs are selected by this unit's percentiles and use matrix: different lakes lead with different dimensions. Figures are ATTAINS / portal register arithmetic, not advice.
The signature stat: cause-list length
The standout filed fact is a short cause list: 0 causes, shorter than 51% of assessed lake-type units. A short list can mean a focused impairment, or a shallow assessment.
Large assessed unit
At 2,350 acres, Arbuckle Lake clears the upper tercile of assessed lake-type units with an area on file (1,210 still larger). Size comparisons use the portal's deduplicated lake ranking population, not raw ATTAINS row counts.
All ruled-on uses pass
The filed use determinations for aquatic life are all Fully Supporting. Where an overall IR category still flags the unit, look at the cause list and report standing rather than treating the use row as empty.
Overall status: fully supporting
Overall status is Fully Supporting. If an IR category or cause row still appears, it usually reflects a prior listing path or a use the overall rollup does not collapse, read those sections rather than stopping at the tile.
According to the U.S. Environmental Protection Agency's ATTAINS program, Oklahoma carries 456 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Arbuckle Lake without modification. See our methodology for reporting-unit limits and gauge linking rules.
The record
Designated-use assessments
Fully Supporting and Not Supporting are the Chickasaw Nation's definitive verdicts; other entries mean the use was not conclusively assessed in this cycle. The latest monitoring the Chickasaw Nation filed against this record runs through 2025. For the one definitive verdict on this record, the Chickasaw Nation filed the assessment basis as Monitored Data. Those are EPA's own words, not PlainLakes' summary of them.
| Designated use | Group | Verdict |
|---|---|---|
| Aquatic Life | Aquatic-life or related | Fully Supporting |
The record
Listed impairment causes
The Chickasaw Nation's reported assessment lists no impairment causes for this lake.
Reading the record
Where Arbuckle Lake sits among peers
50% of Oklahoma's lakes assessed this deeply were also judged fully supported
The Chickasaw Nation ruled definitively on a single designated use at Arbuckle Lake and found it supported. The dataset shows 26 Oklahoma lakes judged to that same depth.
Oklahoma's assessed lakes are most often judged on 5 or more uses; this one was judged on 1.
Computed share from EPA ATTAINS filed records, not an official EPA rating or safety grade.
| 1 | 2 | 3 | 4 | 5+ | |
|---|---|---|---|---|---|
| All supported | 13 (this record) | 8 | 7 | 8 | 9 |
| Mixed | Not possible | 6 | 12 | 30 | 92 |
| None supported | 13 | 0 | 0 | 0 | 0 |
Ringed cell: Arbuckle Lake. Source: EPA ATTAINS, Reporting cycles 1987–2026.
Scale and rank
Arbuckle Lake is one of 456 lake-type waterbodies reported to EPA from Oklahoma. It is not among the 173 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 2,350 assessed acres it ranks 1,211th by assessed size among the 38,628 lakes the dataset carries an area for, counting a state’s repeated filings of one water once, behind 1,210 lakes with a larger one.
What this record holds
The Chickasaw Nation completed an assessment here and listed no impairment cause, so the record holds a verdict and its supporting use rows but no pollutant to track over time. The Chickasaw Nation has not yet filed a definitive fish-consumption verdict and a definitive recreation verdict for this record; those fields populate when it reports them in a future Integrated Report cycle.
In context
Where Arbuckle Lake sits nationally
Assessed size among U.S. lakes
Distribution of assessed acreage across ATTAINS lakes filed with an area, counting a state’s repeated filings of one water once
2,350 Top 3% larger than 97% of 38,628 lakes
lakes the dataset carries an area for, counting a state’s repeated filings of one water once, bucketed by value
Source EPA ATTAINS · Reporting cycles 1987–2026
Listed causes vs waterbodies carrying a verdict
How many impairment causes U.S. waterbodies with a reported verdict carry
0 Among the shortest cause lists fewer listed causes than 51% of 23,610 waterbodies carrying a verdict
named waterbodies carrying a verdict, bucketed by value
Source EPA ATTAINS · Reporting cycles 1987–2026
In both charts each bar is a band and taller bars hold more waterbodies; the dashed line and filled bar mark Arbuckle Lake. Hover or tap any bar for its full count and share.
In context
Oklahoma context
ATTAINS carries 456 lake-type waterbodies in Oklahoma, 153 assessed as not supporting at least one use and 45 fully supporting.
| Other large assessed lakes in Oklahoma | Assessed acres |
|---|---|
| Grand Lake Site 12 Not Supporting | 46,500 |
| Grand Lake Site 13 Not Supporting | 46,500 |
| Grand Lake Site 14 Fully Supporting | 46,500 |
| Grand Lake Site 15 Fully Supporting | 46,500 |
| Robert S. Kerr Lake Not Supporting | 43,380 |
| Texoma Lake, Red River Arm, Lower Not Supporting | 31,081 |
Peers near Arbuckle Lake's size or cause load
Similar assessed acres
Nearest filed extents (2,350 acres here).
- Lake Granbury · 2,351 acres · TX
- North Branch Dead River · 2,348 acres · ME
- Swan · 2,345 acres · IL
- Crooked lake · 2,355 acres · MI
Similar cause load
Nearest listed-cause counts (0 here). Peers already in the acreage column are omitted.
- 31st Street Harbor · 0 causes · IL
- 42nd Avenue East Beach · 0 causes · MN
- 59th Street Harbor · 0 causes · IL
- 657 Dunleavy (Beach) · 0 causes · MI
What to do with this record
- Assessment verdicts are cycle-based, not real-time. For fish-consumption decisions, your state advisory program is the binding source. Consumption status guide
- Impairment listings follow the Clean Water Act 303(d) process; a listing is a regulatory finding, not a closure notice. 303(d) explained
PlainLakes renders state assessment decisions and federal gauge observations without modification. It does not issue advisories.
Assessment decisions on this page are rendered directly from state Integrated Report records in EPA's ATTAINS system; gauge figures are daily-value observations from the USGS National Water Information System, no number is typed in by an editor. Overall status, use verdicts, and causes are the Chickasaw Nation's reported decisions for assessment unit ALMUR. Counts and percentiles are computed across all lake-type records PlainLakes ingests from ATTAINS. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-17. Primary sources: EPA ATTAINS and USGS National Water Information System.