New Mexico reservoir · state assessment record
Lake Maloya
Assessment decisions reported by New Mexico to EPA under Clean Water Act sections 303(d) and 305(b), last assessed in the 2026 reporting cycle.
- 116
- Assessed acres
- Reservoir
- Water type
- 7,509.3 ft
- Water Surface Elevation (provisional)
This waterbody in one line
Lake Maloya, a reservoir in New Mexico, is assessed as not supporting one or more designated uses, with one listed impairment cause in the state's most recent Integrated Report cycle (2026). By assessed acreage it sits above the national median by assessed acreage (38,628 lakes); its impairment list is among the longest nationally (one listed cause vs 23,610 assessed lakes). New Mexico rules it not supporting for coldwater aquatic life, while other aquatic-life uses are supported. A USGS gauge tracks its water surface elevation daily.
- Not Supporting
- overall status
- P73
- Assessed size nationally
- P20
- Shorter cause list
- Not Supporting
- aquatic-life or related
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.
How Lake Maloya 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 Lake Maloya nationally is assessed size: 115.5 acres, larger than 73% of the 38,628 lake-type units with an area on file.
The uses disagree
This record splits: Not Supporting on aquatic life, Fully Supporting on recreation. The divergence is inside the designated-use matrix, not a single all-or-nothing label.
Lake Maloya: Category 4A reading
Category 4A means a TMDL (or equivalent) is already approved for the impairment on Lake Maloya. The remaining work is implementation and tracking, read the cleanup-standing and cause rows for what the state already committed to address.
Overall status: not supporting
The filer's overall status for Lake Maloya 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, New Mexico carries 176 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Lake Maloya 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 |
|---|---|---|
| Coldwater Aquatic Life | Aquatic-life or related | Not Supporting |
| Irrigation | Other | Fully Supporting |
| Livestock Watering | Other | Fully Supporting |
| Primary Contact | Recreation | Fully Supporting |
| Wildlife Habitat | Aquatic-life or related | Fully Supporting |
| Public Water Supply | Drinking-water supply designation | Not Assessed |
The record
Listed impairment causes
Causes the state listed as impairing designated uses of this reservoir, with the cycle each was first listed and the Clean Water Act action recorded against it.
| Cause | Affected uses | First listed | Cleanup standing |
|---|---|---|---|
| Nutrients | Coldwater Aquatic Life | 2018 | TMDL approved |
Probable sources named by the state
Each source below is listed under the cause the state filed it against, and carries the word the state filed with it — confirmed, or suspected.
- Nutrients
- Drought-Related Impacts (suspected) Other Recreational Pollution Sources (suspected) Waterfowl (suspected) Impervious Surface/Parking Lot Runoff (suspected) Watershed Runoff Following Forest Fire (suspected) Off-Road Vehicles (suspected) Rangeland Grazing (suspected) Wildlife Other Than Waterfowl (suspected) Grazing in Riparian or Shoreline Zones (suspected) Highway/Road/Bridge Runoff (Non-Construction Related) (suspected)
Reading the record
Lake Maloya: Category 4A reading
4A Category 4A: impaired, TMDL completed
New Mexico filed this assessment unit as Category 4A: impaired, with a pollutant-budget TMDL already completed under 303(d). The listing remains an impairment finding; the plan is on file rather than still awaiting write-up.
Scale and rank
Lake Maloya is one of 176 lake-type waterbodies reported to EPA from New Mexico, and one of 58 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 116 assessed acres it ranks 10,630th 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 10,629 lakes with a larger one.
Water level
A USGS gauge tracks this reservoir's water surface elevation daily, and the latest reading is 0.69 ft below the reading 30 days earlier, against a 365-day observed range of 1.7 ft. The state has not yet filed a definitive fish-consumption verdict for this record; that field populates when it reports it in a future Integrated Report cycle.
Water level: 365-day record
Daily water surface elevation values, feet above the National Geodetic Vertical Datum of 1929 (NGVD 29), from USGS gauge 07199450 (Lake Maloya Nr Raton Nm), 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
- 7,509.3 ft 0.6899999999995998ft vs 30 days earlier
- 2026-08-15 · Provisional, subject to USGS revision
Water level: 365-day record
Subscribe to water level updates for Lake Maloya (RSS)
138 of the 314 daily values in this window (44%) are provisional and subject to USGS revision; USGS has approved this gauge's record through 2026-03-30.
Full gauge record: USGS monitoring location 07199450
In context
Where Lake Maloya 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
116 Top 27% larger than 73% 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 Maloya. Hover or tap any bar for its full count and share.
In context
New Mexico context
ATTAINS carries 176 lake-type waterbodies in New Mexico, 46 assessed as not supporting at least one use and 28 fully supporting. Among the 58 indexed units there, Lake Maloya ranks 32nd by listed-cause count (one listed cause) and 25th by assessed size among the 58 with an area filed; it sits in the not-supporting set (46 statewide) . Its listed causes include Nutrients, which also appears among New Mexico's most-filed impairment causes (led by Nutrients).
| Other large assessed lakes in New Mexico | Assessed acres |
|---|---|
| Navajo Reservoir Not Supporting | 12,680 |
| Elephant Butte Reservoir Not Supporting | 10,909 |
| South Lordsburg Playa Not Assessed | 7,412 |
| Ute Reservoir Not Supporting | 5,988 |
| Heron Reservoir Not Supporting | 4,497 |
| Laguna del Pero Fully Supporting | 4,477 |
Peers near Lake Maloya's size or cause load
Similar assessed acres
Nearest filed extents (116 acres here).
- Lake Felter · 116 acres · FL
- Hansel · 116 acres · MN
- Twin · 116 acres · MN
- Lake Ludlow · 116 acres · NY
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
- Water levels shown are daily snapshots. Seasonal drawdown and datum conventions matter when comparing levels. How to read level 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 NM-2305.B_20. 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.