Arkansas lake · state assessment record
Nimrod Lake (1,370 acres)
Assessment decisions reported by Arkansas to EPA under Clean Water Act sections 303(d) and 305(b), last assessed in the 2022 reporting cycle. The cleanup plan below was established by EPA rather than by Arkansas.
- 1,370
- Assessed acres
- Lake, Freshwater
- Water type
This waterbody in one line
Nimrod Lake, a lake in Arkansas, is assessed as not supporting one or more designated uses, with 2 listed impairment causes in the state's most recent Integrated Report cycle (2022). By assessed acreage it sits among the largest 5% by assessed acreage nationally (38,628 lakes); its impairment list is among the longest nationally (2 listed causes vs 23,610 assessed lakes). Aquatic life is assessed as not supporting. Fish consumption is assessed as not supporting.
- Not Supporting
- overall status
- P95
- Assessed size nationally
- P10
- Shorter cause list
- Not 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.
Nimrod Lake 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: in-state cause rank
Inside Arkansas, cause-list rank is the local separator: Nimrod Lake is 2 of 69 indexed units by listed-cause count, toward the top of that state's filed lists.
Large assessed unit
At 1,370 acres, Nimrod Lake clears the upper tercile of assessed lake-type units with an area on file (1,820 still larger). Size comparisons use the portal's deduplicated lake ranking population, not raw ATTAINS row counts.
Every ruled-on use is not supporting
On the uses this filer ruled on, fish consumption, aquatic life, every determination is Not Supporting. That is a use-by-use reading of the filed record, not a single overall lake grade.
Nimrod Lake: Category 5, TMDL still owed
Category 5 is the Integrated Report band where a TMDL (or equivalent) is still expected for Nimrod Lake. Read the listed causes and any cleanup actions filed beside them before treating the overall status tile as a finished restoration story.
Longer than most cause lists
2 listed causes puts this unit above 80% of assessed lake-type records by list length. Treat that as a coding-and-sampling signal: states that split pollutants finely mint longer lists without proving worse water.
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 Nimrod 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 state's definitive verdicts; other entries mean the use was not conclusively assessed in this cycle.
| Designated use | Group | Verdict |
|---|---|---|
| Agricultural Water Supply | Other | Fully Supporting |
| Aquatic Life | Aquatic-life or related | Not Supporting |
| Domestic Water Supply | Drinking-water supply designation | Fully Supporting |
| Fish Consumption | Fish-consumption or fishery | Not Supporting |
| Industrial Water Supply | Other | Fully Supporting |
| Other Uses | Other | Fully Supporting |
| Primary Contact Recreation | Recreation | Not Assessed |
| Secondary Contact Recreation | Recreation | Not Assessed |
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 |
|---|---|---|---|
| Mercury in Fish Tissue | Fish Consumption | 1998 | TMDL established by EPA |
| Dissolved Oxygen | Aquatic Life | 2022 | TMDL priority: High |
Reading the record
EPA plan standing on Nimrod Lake
1 cleanup plan EPA established here
EPA, not Arkansas, established that plan.
Scale and rank
Nimrod Lake 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 1,370 assessed acres it ranks 1,821st 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 1,820 lakes with a larger one.
Awaiting a filing
The state has not yet filed a definitive recreation verdict for this record; that field populates when it reports it in a future Integrated Report cycle.
Why no water-level record
Nimrod Lake has no daily USGS water-level or reservoir-storage series on this page because NWIS lists a lake monitoring site named for the waterbody, but the site is not active, and PlainLakes ingests only the active inventory, so there is no series to attach. How PlainLakes links gauges.
In context
Where Nimrod 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
1,370 Top 5% larger than 95% 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
2 Longer than most more listed causes than 80% 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 Nimrod Lake. 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, Nimrod Lake ranks 2nd by listed-cause count (2 listed causes) and 16th by assessed size among the 69 with an area filed; it sits in the not-supporting set (62 statewide) . Its listed causes include Mercury in Fish Tissue and Dissolved Oxygen, which also appear 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 Nimrod Lake's size or cause load
Similar assessed acres
Nearest filed extents (1,370 acres here).
- Edenton Bay · 1,370 acres · NC
- Lake Gaston · 1,369 acres · VA
- Paulina Lake · 1,371 acres · OR
- Lake Pocasse · 1,371 acres · SD
Similar cause load
Nearest listed-cause counts (2 here). Peers already in the acreage column are omitted.
- 12th St. Beach · 2 causes · IL
- 31st St. Beach · 2 causes · IL
- 49th St. Beach · 2 causes · IL
- 57th St. Beach · 2 causes · IL
What to do with this record
- The fish-consumption use is assessed as not supporting. Before eating fish from this lake, check your state fish-advisory program for species-specific meal limits. 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_11110206_4052. 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.