Missouri reservoir · state assessment record
Pomme de Terre Lake
Assessment decisions reported by Missouri to EPA under Clean Water Act sections 303(d) and 305(b), last assessed in the 2026 reporting cycle.
- 7,675
- Assessed acres
- Reservoir
- Water type
- 839.5 ft
- Gage Height (provisional)
This waterbody in one line
Pomme de Terre Lake, a reservoir in Missouri, 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 among the largest 1% of assessed lakes nationally (38,628 lakes with a filed area); its impairment list is among the longest nationally (one listed cause vs 23,610 assessed lakes). Aquatic life is assessed as not supporting. Missouri assesses human health protection as supported; it reported no verdict on fish consumption itself. A USGS gauge tracks its gage height daily.
- Not Supporting
- overall status
- P99
- Assessed size nationally
- P20
- Shorter cause list
- Not Supporting
- aquatic life
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.
Pomme de Terre 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: assessed size
The number that most separates Pomme de Terre Lake nationally is assessed size: 7,675 acres, larger than 99% of the 38,628 lake-type units with an area on file.
A split ruling across uses
This record splits: Not Supporting on aquatic life, Fully Supporting on fish consumption, recreation. The divergence is inside the designated-use matrix, not a single all-or-nothing label.
Pomme de Terre Lake: Category 4A reading
Category 4A means a TMDL (or equivalent) is already approved for the impairment on Pomme de Terre Lake. 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 Pomme de Terre Lake 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, Missouri carries 623 filed lake-type waterbodies in the August 2026 extract, and this page renders the assessment record EPA assigned to Pomme de Terre Lake without modification. See our methodology for reporting-unit limits and gauge linking rules.
The record
Assessment entries
Fully Supporting and Not Supporting are the state's definitive verdicts; other entries mean the use was not conclusively assessed in this cycle.
| Assessment entry | Group | Verdict |
|---|---|---|
| Human Health Protection | Fish-consumption or fishery | Fully Supporting |
| Secondary Contact Recreation | Recreation | Fully Supporting |
| Warm Water Habitat | Aquatic-life or related | Not Supporting |
| Whole Body Contact Recreation - Category a | Recreation | Fully Supporting |
| Irrigation | Other | Insufficient Information |
| Livestock and Wildlife Protection | Aquatic-life or related | Insufficient Information |
| Unclassified with General Criteria Protections | Other | Insufficient Information |
Not every entry above is a designated use: Unclassified with General Criteria Protections is a record that the water carries no classified designated use. The state files it in the ATTAINS use column, so it carries whatever verdict the state recorded against it.
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 |
|---|---|---|---|
| Chlorophyll-a | Warm Water Habitat | 2020 | 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.
- Chlorophyll-a
- Non-Point Source (suspected)
Reading the record
Pomme de Terre Lake: Category 4A reading
4A Category 4A: impaired, TMDL completed
Missouri 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
Pomme de Terre Lake is one of 623 lake-type waterbodies reported to EPA from Missouri, and one of 170 whose reported record carries enough populated assessment or gauge data for this site to list and index it. At 7,675 assessed acres it ranks 423rd 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 422 lakes with a larger one.
Water level
A USGS gauge tracks this reservoir's gage height daily, and the latest reading is 2.02 ft below the reading 30 days earlier, against a 365-day observed range of 14.2 ft.
Water level: 365-day record
Daily gage height values, feet above this gauge’s own local zero, not above sea level, from USGS gauge 06921325 (Pomme De Terre Lake Near Hermitage, Mo), shown weekly. Readings are daily-batch snapshots, not real-time conditions. Each daily value is a single reading taken at 08:00, not a daily mean. It is the only daily statistic USGS files for this gauge.
- Latest reading
- 839.5 ft 2.019999999999982ft vs 30 days earlier
- 2026-08-16 · Provisional, subject to USGS revision
Water level: 365-day record
Subscribe to water level updates for Pomme de Terre Lake (RSS)
74 of the 366 daily values in this window (20%) are provisional and subject to USGS revision; USGS has approved this gauge's record through 2026-06-03.
Full gauge record: USGS monitoring location 06921325
In context
Where Pomme de Terre 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
7,675 Top 1% larger than 99% 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 Pomme de Terre Lake. Hover or tap any bar for its full count and share.
In context
Missouri context
ATTAINS carries 623 lake-type waterbodies in Missouri, 151 assessed as not supporting at least one use and 118 fully supporting. Among the 170 indexed units there, Pomme de Terre Lake ranks 35th by listed-cause count (one listed cause) and 9th by assessed size among the 170 with an area filed; it sits in the not-supporting set (151 statewide) . Its listed causes include Chlorophyll-a, which also appears among Missouri's most-filed impairment causes (led by Chlorophyll-a).
| Other large assessed lakes in Missouri | Assessed acres |
|---|---|
| Lake of the Ozarks Not Supporting | 59,520 |
| Harry S Truman Reservoir Not Supporting | 55,600 |
| Table Rock Lake Not Supporting | 41,747 |
| Stockton Lake Fully Supporting | 23,680 |
| Mark Twain Lake Not Supporting | 20,100 |
| Bull Shoals Lake Not Supporting | 9,000 |
Peers near Pomme de Terre Lake's size or cause load
Similar assessed acres
Nearest filed extents (7,675 acres here).
- Lake Saint Croix · 7,696 acres · WI
- Island Park Reservoir · 7,647 acres · ID
- Lake Texoma · 7,703 acres · TX
- Whitefish · 7,720 acres · MN
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 MO_7238.00. 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.