New Mexico reservoir · state assessment record
Hopewell Lake
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.
- 16
- Assessed acres
- Reservoir
- Water type
This waterbody in one line
Hopewell Lake, a reservoir in New Mexico, is assessed as not supporting one or more designated uses, with 2 listed impairment causes in the state's most recent Integrated Report cycle (2026). By assessed acreage it sits below the national median by assessed acreage (38,628 lakes); its impairment list is among the longest nationally (2 listed causes vs 23,610 assessed lakes). New Mexico rules it not supporting for high quality coldwater aquatic life, while other aquatic-life uses are supported.
- Not Supporting
- overall status
- P27
- Assessed size nationally
- P10
- 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.
Hopewell 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: cause-list length
The standout filed fact is cause-list length: 2 listed impairment causes, a longer list than 80% of assessed lake-type units (n=23,610). List length tracks how states sample and code, not a severity score.
A split ruling across uses
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.
Hopewell Lake: Category 5, TMDL still owed
Category 5 is the Integrated Report band where a TMDL (or equivalent) is still expected for Hopewell Lake. Read the listed causes and any cleanup actions filed beside them before treating the overall status tile as a finished restoration story.
Overall status: not supporting
The filer's overall status for Hopewell Lake is Not Supporting. That tile summarizes the assessment unit; the designated-use rows and cause list are the evidence behind it.
Small within New Mexico
State size rank 46 of 58 puts Hopewell Lake toward the small end of New Mexico's indexed lake-type units with an area.
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 Hopewell 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 |
|---|---|---|
| Domestic Water Supply | Drinking-water supply designation | Fully Supporting |
| High Quality Coldwater Aquatic Life | Aquatic-life or related | Not Supporting |
| Irrigation Storage | Other | Fully Supporting |
| Livestock Watering | Other | Fully Supporting |
| Primary Contact | Recreation | Fully Supporting |
| Wildlife Habitat | Aquatic-life or related | Fully Supporting |
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 | High Quality Coldwater Aquatic Life | 2014 | TMDL priority: High |
| pH | High Quality Coldwater Aquatic Life | 2026 | TMDL priority: High |
Reading the record
Cleanup queue for Hopewell Lake
2 listed causes ranked High in the TMDL queue, still without a plan
New Mexico ranked 2 listed causes high in its TMDL development queue, and no cleanup plan is on file for those listings yet. That queue rank is the state's own scheduling signal, not an EPA national rule.
A High ranking names a position in the state's plan-writing queue; it is not a measure of how impaired the water is. How listing and cleanup work.
Scale and rank
Hopewell Lake 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 16 assessed acres it ranks 28,099th 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 28,098 lakes with a larger one.
Still unfiled
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.
In context
Where Hopewell 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
16 Top 73% larger than 27% 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 Hopewell Lake. 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, Hopewell Lake ranks 22nd by listed-cause count (2 listed causes) and 46th by assessed size among the 58 with an area filed; it sits in the not-supporting set (46 statewide) . Its listed causes include Nutrients and pH, which also appear 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 Hopewell Lake's size or cause load
Similar assessed acres
Nearest filed extents (16 acres here).
- Mayflower Lake · 16 acres · WI
- Triple Lakes · 16 acres · ID
- French Marsh (North) · 16 acres · MN
- Krilwitz · 16 acres · MN
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
- 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 NM-2112.B_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.