California reservoir · state assessment record
Beardsley Lake
The assessment record reported by California to EPA under Clean Water Act sections 303(d) and 305(b), filed in the 2026 reporting cycle.
- 704
- Assessed acres
- Lake / Reservoir / Pond
- Water type
- 69,700.0 acre-ft
- Reservoir Storage (provisional)
This waterbody in one line
Beardsley Lake, a reservoir in California, was reported but not assessed in the state's most recent Integrated Report cycle (2026). By assessed acreage it sits among the largest 10% by assessed acreage nationally (38,628 lakes). A USGS gauge tracks its reservoir storage daily.
- Not Assessed
- overall status
- P93
- Assessed size nationally
Assessment verdicts are the state agency's decisions as reported to EPA ATTAINS; PlainLakes renders them without modification.
How Beardsley 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 Beardsley Lake nationally is assessed size: 704.2 acres, larger than 93% of the 38,628 lake-type units with an area on file.
IR category 3 on Beardsley Lake
The Integrated Report category filed for Beardsley 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, California carries 607 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Beardsley 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 |
|---|---|---|
| Cold Freshwater Habitat | Aquatic-life or related | Insufficient Information |
| Commercial and Sport Fishing | Fish-consumption or fishery | Insufficient Information |
The record
Listed impairment causes
The state reported this reservoir in its 2026 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 Beardsley Lake's record holds
Scale and rank
Beardsley Lake is one of 607 lake-type waterbodies reported to EPA from California. It is not among the 195 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 704 assessed acres it ranks 2,923rd 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 2,922 lakes with a larger one.
Reservoir storage
A USGS gauge tracks this reservoir's storage daily, and the latest reading is 15,400.00 acre-ft less than the reading 30 days earlier, against a 365-day observed range of 66,470.0 acre-ft. 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.
Reservoir storage: 365-day record
Daily reservoir storage values from USGS gauge 11292800 (Beardsley Lake Near Strawberry Ca), shown weekly. Readings are daily-batch snapshots, not real-time conditions. Each daily value is a single reading taken at 24:00, not a daily mean. It is the only daily statistic USGS files for this gauge.
- Latest reading
- 69,700.0 acre-ft 15400acre-ft vs 30 days earlier
- 2026-08-15 · Provisional, subject to USGS revision
Reservoir storage: 365-day record
Subscribe to reservoir storage updates for Beardsley Lake (RSS)
118 of the 365 daily values in this window (32%) are provisional and subject to USGS revision; USGS has approved this gauge's record through 2026-04-19.
Full gauge record: USGS monitoring location 11292800
In context
Where Beardsley 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
704 Top 7% larger than 93% 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 Beardsley Lake. Hover or tap any bar for its full count and share.
In context
California context
ATTAINS carries 607 lake-type waterbodies in California, 202 assessed as not supporting at least one use and 22 fully supporting.
| Other large assessed lakes in California | Assessed acres |
|---|---|
| Salton Sea Not Supporting | 233,045 |
| Tahoe, Lake Not Supporting | 84,092 |
| Goose Lake (Modoc County) Not reported | 62,385 |
| Honey Lake Not Supporting | 55,526 |
| Klamath River HU, Tule Lake and Lower Klamath Lake National Wildlife Refuge Not Supporting | 48,791 |
| Mono Lake Not Supporting | 45,299 |
Lakes near Beardsley Lake's assessed acres
Similar assessed acres
Nearest filed extents (704 acres here).
- Parksville Reservoir · 704 acres · TN
- Lower Mission · 703 acres · MN
- Lobster (East Bay) · 703 acres · MN
- Big Portage (West Bay) · 703 acres · MN
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
- Storage is a volume in acre-feet, not a water level, and it moves with seasonal drawdown and release schedules as well as inflow. How to read gauge data
- 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 CAL5344200020111118151514. 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.