Alaska lake · state assessment record
Mirror Lake
The assessment record reported by Alaska to EPA under Clean Water Act sections 303(d) and 305(b), filed in the 1997 reporting cycle.
- 131
- Assessed acres
- Lake, Freshwater
- Water type
This waterbody in one line
Mirror Lake, a lake in Alaska, was reported but not assessed in the state's most recent Integrated Report cycle (1997). By assessed acreage it sits in the upper quartile by assessed acreage nationally (38,628 lakes).
- Not Assessed
- overall status
- P75
- Assessed size nationally
Assessment verdicts are the state agency's decisions as reported to EPA ATTAINS; PlainLakes renders them without modification.
How Mirror Lake reads against 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 Mirror Lake nationally is assessed size: 131 acres, larger than 75% of the 38,628 lake-type units with an area on file.
IR category 3 on Mirror Lake
The Integrated Report category filed for Mirror Lake 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, Alaska carries 77 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Mirror 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 |
|---|---|---|
| Fresh Water / Growth and Propagation of Fish, Shellfish, Other Aquatic Life and Wildlife | Aquatic-life or related | Insufficient Information Filer confidence: Good |
| Fresh Water / Water Recreation / Contact Recreation | Recreation | Insufficient Information Filer confidence: Good |
| Fresh Water / Water Recreation / Secondary Recreation | Recreation | Insufficient Information Filer confidence: Good |
| Fresh Water / Water Supply / Agriculture, Including Irrigation and Stock Watering | Other | Insufficient Information Filer confidence: Good |
| Fresh Water / Water Supply / Aquaculture | Other | Insufficient Information Filer confidence: Good |
| Fresh Water / Water Supply / Drinking, Culinary, and Food Processing | Drinking-water supply designation | Insufficient Information Filer confidence: Good |
| Fresh Water / Water Supply / Industrial | Other | Insufficient Information Filer confidence: Good |
The record
Listed impairment causes
The state reported this lake in its 1997 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 Mirror Lake's record holds
Scale and rank
Mirror Lake is one of 77 lake-type waterbodies reported to EPA from Alaska. It is not among the 12 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 131 assessed acres it ranks 9,773rd 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 9,772 lakes with a larger one.
What this record holds
Alaska filed this lake in its 1997 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.
Reported trophic class
Alaska carried the trophic field for this assessment unit and filed it as unclassified, which records that no class was determined rather than that the water is unenriched. What the trophic scale measures.
In context
Where Mirror 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
131 Top 25% larger than 75% 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 Mirror Lake. Hover or tap any bar for its full count and share.
In context
Alaska context
ATTAINS carries 77 lake-type waterbodies in Alaska, 7 assessed as not supporting at least one use and 9 fully supporting.
| Other large assessed lakes in Alaska | Assessed acres |
|---|---|
| Iliamna Lake Not Assessed | 960,000 |
| Kenai Lake Not Assessed | 57,618 |
| Whitefish Lake Not Assessed | 18,726 |
| Lower Fire Lake Not Assessed | 4,480 |
| Redoubt Lake Not Assessed | 3,209 |
| Harding Lake Fully Supporting | 2,659 |
Lakes near Mirror Lake's assessed acres
Similar assessed acres
Nearest filed extents (131 acres here).
- Big Cedar Lake (Put & Take Trout) · 131 acres · IN
- Gallagher Canyon Reservoir · 131 acres · NE
- Lake Holiday Hide-Away · 131 acres · IN
- Lake Winthrop · 131 acres · MA
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 AK_L_2040108_043. 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.