Arkansas lake · state assessment record
Lake Maumelle
Assessment decisions reported by Arkansas to EPA under Clean Water Act sections 303(d) and 305(b), last assessed in the 2022 reporting cycle.
- 5,936
- Assessed acres
- Lake, Freshwater
- Water type
This waterbody in one line
Lake Maumelle, a lake in Arkansas, is assessed as not supporting one or more designated uses, with one listed impairment cause in the state's most recent Integrated Report cycle (2022). By assessed acreage it sits among the largest 1% of assessed lakes nationally (38,628 lakes with a filed area); its impairment list is among the longest nationally (one listed cause vs 23,610 assessed lakes). Aquatic life is assessed as fully supporting.
- Not Supporting
- overall status
- P99
- Assessed size nationally
- P20
- Shorter cause list
- Fully Supporting
- aquatic life
Assessment verdicts are the state agency'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.
Lake Maumelle against the ATTAINS register
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: assessed size
The number that most separates Lake Maumelle nationally is assessed size: 5,936 acres, larger than 99% of the 38,628 lake-type units with an area on file.
Lake Maumelle: Category 5, TMDL still owed
Category 5 is the Integrated Report band where a TMDL (or equivalent) is still expected for Lake Maumelle. Read the listed causes and any cleanup actions filed beside them before treating the overall status tile as a finished restoration story.
Every ruled-on use is fully supporting
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: not supporting
The filer's overall status for Lake Maumelle is Not Supporting. That tile summarizes the assessment unit; the designated-use rows and cause list are the evidence behind it.
Typical cause-list length
1 listed cause is a middle-tercile list length among assessed lake-type units. Look to IR category and use outcomes for the distinctive reading.
According to the U.S. Environmental Protection Agency's ATTAINS program, Arkansas carries 144 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Lake Maumelle 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 state's definitive verdicts; other entries mean the use was not conclusively assessed in this cycle.
| Designated use | Group | Verdict |
|---|---|---|
| Aquatic Life | Aquatic-life or related | Fully Supporting |
| Other Uses | Other | Not Supporting |
The record
Listed impairment causes
Causes the state listed as impairing designated uses of this lake, with the cycle each was first listed and the Clean Water Act action recorded against it.
| Cause | Affected uses | First listed | Cleanup standing |
|---|---|---|---|
| pH | Other Uses | 2022 | TMDL priority: Medium |
Reading the record
Where Lake Maumelle sits among peers
83% of Arkansas's lakes assessed this deeply also came out mixed
Arkansas ruled definitively on 2 designated uses at Lake Maumelle and found 1 of 2 not supported. The dataset shows 30 Arkansas lakes judged to that same depth.
Arkansas's assessed lakes are most often judged on 5 or more uses; this one was judged on 2.
Computed share from EPA ATTAINS filed records, not an official EPA rating or safety grade.
| 1 | 2 | 3 | 4 | 5+ | |
|---|---|---|---|---|---|
| All supported | 1 | 4 | 0 | 0 | 50 |
| Mixed | Not possible | 25 (this record) | 0 | 0 | 18 |
| None supported | 18 | 1 | 0 | 0 | 0 |
Ringed cell: Lake Maumelle. Source: EPA ATTAINS, Reporting cycles 1987–2026.
Scale and rank
Lake Maumelle is one of 144 lake-type waterbodies reported to EPA from Arkansas, and one of 69 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 5,936 assessed acres it ranks 528th 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 527 lakes with a larger one.
Open in the register
The state 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.
Why no water-level record
Lake Maumelle has no daily USGS water-level or reservoir-storage series on this page because a site carries the lake’s name, but that name fits more than one assessed waterbody in the state, and PlainLakes declines it rather than guessing. How PlainLakes links gauges.
In context
Where Lake Maumelle 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
5,936 Top 1% larger than 99% 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
1 Longer than most more listed causes than 49% 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 Lake Maumelle. Hover or tap any bar for its full count and share.
In context
Arkansas context
ATTAINS carries 144 lake-type waterbodies in Arkansas, 62 assessed as not supporting at least one use and 55 fully supporting. Among the 69 indexed units there, Lake Maumelle ranks 12th by listed-cause count (one listed cause) and 7th by assessed size among the 69 with an area filed; it sits in the not-supporting set (62 statewide) . Its listed causes include pH, which also appears among Arkansas's most-filed impairment causes (led by Mercury in Fish Tissue).
| Other large assessed lakes in Arkansas | Assessed acres |
|---|---|
| Dardanelle Lake Fully Supporting | 34,041 |
| Millwood Lake Fully Supporting | 29,500 |
| Ouachita Lake Fully Supporting | 24,695 |
| Bull Shoals Not Supporting | 22,046 |
| Greers Ferry Lake Fully Supporting | 18,151 |
| Felsenthal Lake Not Supporting | 14,000 |
Peers near Lake Maumelle's size or cause load
Similar assessed acres
Nearest filed extents (5,936 acres here).
- Saylorville Reservoir · 5,950 acres · IA
- Browns Creek (Lake Guntersville) · 5,916 acres · AL
- Laurel River Lake · 5,963 acres · KY
- Androscoggin River (4) at Riley Dam · 5,906 acres · ME
Similar cause load
Nearest listed-cause counts (1 here). Peers already in the acreage column are omitted.
- Aaron · 1 causes · MN
- Aaron River Reservoir · 1 causes · MA
- Abbotts Creek (including Lexington-Thomasville Water Supply Reservoir at normal reservoir elevation, Tom-A-Lex Lake) · 1 causes · NC
- Abeniki Lake · 1 causes · NH
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 state's reported decisions for assessment unit AR_11110207_4071. 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.