Nevada reservoir · state assessment record
Swan Reservoir
The assessment record reported by Nevada to EPA under Clean Water Act sections 303(d) and 305(b), filed in the 2022 reporting cycle.
- 1,201
- Assessed acres
- Reservoir
- Water type
This waterbody in one line
Swan Reservoir, a reservoir in Nevada, was reported but not assessed 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).
- Not Assessed
- overall status
- P95
- Assessed size nationally
Assessment verdicts are the state agency's decisions as reported to EPA ATTAINS; PlainLakes renders them without modification.
Where Swan Reservoir stands in the filed 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 Swan Reservoir nationally is assessed size: 1,201 acres, larger than 95% of the 38,628 lake-type units with an area on file.
IR category 3 on Swan Reservoir
The Integrated Report category filed for Swan Reservoir is 3. PlainLakes renders EPA's code without remapping it into a consumer grade.
Overall status: Not Assessed
ATTAINS overall status on this unit is “Not Assessed”. PlainLakes does not rewrite that vocabulary into a consumer score.
According to the U.S. Environmental Protection Agency's ATTAINS program, Nevada carries 69 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Swan Reservoir 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. Monitoring behind at least one of these designated-use verdicts ran through 2022, as Nevada filed it.
| Designated use | Group | Verdict |
|---|---|---|
| Aquatic Life | Aquatic-life or related | Insufficient Information Filer confidence: Low |
| Irrigation | Other | Insufficient Information Filer confidence: Low |
| Municipal or Domestic Supply | Drinking-water supply designation | Insufficient Information Filer confidence: Low |
| Propagation of Wildlife | Other | Insufficient Information Filer confidence: Low |
| Recreation Involving Contact with the Water | Recreation | Insufficient Information Filer confidence: Low |
| Recreation Not Involving Contact with the Water | Recreation | Insufficient Information Filer confidence: Low |
| Water and Organisms | Aquatic-life or related | Not Assessed |
| Watering of Livestock | Other | Insufficient Information Filer confidence: Low |
The record
Listed impairment causes
The state reported this reservoir in its 2022 Integrated Report cycle but reached no assessment determination, so no causes are listed. The unit is recorded under EPA integrated-reporting Category 3: reviewed, with insufficient information to determine whether it meets water-quality standards. An undetermined waterbody is neither confirmed clean nor confirmed impaired.
Reading the record
What Swan Reservoir's record holds
Scale and rank
Swan Reservoir is one of 69 lake-type waterbodies reported to EPA from Nevada. It is not among the 50 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 1,201 assessed acres it ranks 1,994th 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 1,993 lakes with a larger one.
What this record holds
Nevada filed this reservoir in its 2022 Integrated Report cycle but reached no determination, so the record holds that filing and its use rows, but no verdict, and with nothing judged, no impairment cause to track over time. The state has not yet filed a definitive fish-consumption verdict, a definitive recreation verdict, a definitive aquatic-life verdict, and 1 other for this record; those fields populate when it reports them in a future Integrated Report cycle.
In context
Where Swan Reservoir 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
1,201 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
In both charts each bar is a band and taller bars hold more waterbodies; the dashed line and filled bar mark Swan Reservoir. Hover or tap any bar for its full count and share.
In context
Nevada context
ATTAINS carries 69 lake-type waterbodies in Nevada, 36 assessed as not supporting at least one use and 17 fully supporting.
| Other large assessed lakes in Nevada | Assessed acres |
|---|---|
| Lake Mead Fully Supporting | 147,392 |
| Lake Tahoe Not Supporting | 122,902 |
| Walker Lake Not Supporting | 35,521 |
| Lake Mohave Not Supporting | 27,001 |
| Rye Patch Reservoir Not Supporting | 16,001 |
| Lahontan Reservoir Not Supporting | 14,178 |
Lakes near Swan Reservoir's assessed acres
Similar assessed acres
Nearest filed extents (1,201 acres here).
- Pleasant River · 1,201 acres · ME
- Webber P · 1,201 acres · ME
- Croton Dam Pond · 1,202 acres · MI
- Little Rice Lake · 1,201 acres · WI
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 NV01-NW-13_00. 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.