Longview Lake by Dam is a 930-acre productive, nutrient-rich eutrophic lake in Jackson County, Missouri. Water quality is graded C based on 3 sampling years through 2024. Overall water quality is declining over recent sampling years. Compared to the 26 other monitored lakes in Jackson County, Longview Lake by Dam ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-18. Grade methodology: LakeGrade methodology.
Watch Longview Lake by Dam water quality
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Very murky, less than 3.3 ft of visibility. Phosphorus level: 23.5 µg/L. Chlorophyll-a: 15.7 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.3 ft | F |
| Phosphorus | 23.5 µg/L | B |
| Chlorophyll-a (Algae) | 15.7 µg/L | C |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 930 acres |
Where to stay near Longview Lake by Dam
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Fishing Longview Lake by Dam
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.037 m/yr | 5 |
| Phosphorus | ↓ Declining | +0.97 µg/L/yr | 5 |
| Chlorophyll-a | → Stable | +0.08 µg/L/yr | 5 |
Current Conditions
Latest reading Jul 6, 2026, 4:45 AM from USGS gauge 06893791. See live data ↗ — readings update every 15–60 minutes; this page refreshes on each build.
Water Temperature
Longview Lake by Dam averages about 80°F at the surface in summer, usually warmest in Jul (about 82°F) and coldest in Apr (about 58°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 70 field readings (2010–2024) via the EPA Water Quality Portal. See the full Longview Lake by Dam water temperature breakdown →
Location
County Ranking
Ranked #5 of 27 lakes in Jackson County
Nearby Lakes in Jackson County
Explore Longview Lake by Dam across LakeGrade
More Missouri Lake Rankings
Other Grade C Lakes in Missouri
Eutrophic Lakes in Missouri
Compare Longview Lake by Dam With Nearby Lakes
More records, surveys & data sources
Reservoir Info (USACE NID)
Longview Lake by Dam is a man-made reservoir impounded by the Longview Dam (completed 1985), built primarily for flood risk reduction on the LITTLE BLUE RIVER; earth-type dam, 125 ft tall and 1,900 ft long.
- Surface area
- 930 ac
- Normal storage
- 22,100 ac-ft
- Max storage
- 46,900 ac-ft
- Drainage area
- 50 sq mi
- Hazard class
- High
- Owner
- USACE - Kansas City District
All listed purposes: Flood Risk Reduction;Other;Fish and Wildlife Pond;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID MO82202 · Operator website · Matched by proximity (0.34 km)
EPA Impairment Status
Longview Lake by Dam is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit MO_7097.00 · Official waterbody report · Matched by proximity (2 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-18
Monitoring stations: 1