Nebo Watershed Lake
Jackson County, Kansas38 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Nebo Watershed Lake in Jackson County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.5 ft visibility. Phosphorus: 120 µg/L. Chlorophyll-a (algae): 43 µg/L. Surface area: 38.12 acres.
- Clarity
- 1.5 ft
- Area
- 38 acres
- Phosphorus
- 120 µg/L
- Chlorophyll-a
- 43 µg/L
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Watch Nebo Watershed Lake’s letter
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Why Nebo Watershed Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Nebo Watershed Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by KDHE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Nebo Watershed Lake is a 38-acre lake in Jackson County, Kansas.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2017-06-12. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Nebo Watershed Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water quality measurements for Nebo Watershed Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1.5 ft of visibility. Phosphorus 120 µg/L. Chlorophyll-a 43 µg/L. TSI 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 ft | Not graded |
| Phosphorus | 120 µg/L | Not graded |
| Chlorophyll-a (Algae) | 43 µg/L | Not graded |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 38 acres |
No bathymetric survey has been published for Nebo Watershed Lake, so its depth is not documented here.
Fishing Nebo Watershed Lake
Reservoir Info (USACE NID)
Nebo Watershed Lake is a man-made reservoir impounded by the Frd No 3 (Nebo Creek) (completed 1999), built primarily for flood risk reduction on the Nebo Creek; earth-type dam, 37 ft tall.
- Surface area
- 38.12 ac
- Normal storage
- 281 ac-ft
- Max storage
- 3,181 ac-ft
- Drainage area
- 4.15 sq mi
- Hazard class
- Low
- Owner
- DELAWARE WJD NO 10
Source: USACE National Inventory of Dams, NID ID KS02331 · Operator website · Matched by proximity (0.14 km)
EPA Impairment Status
Nebo Watershed Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit KS-LM061501 · Official waterbody report · Matched by proximity (0.19 km)
Graded lakes near Nebo Watershed Lake
Nebo Watershed Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Jackson County
Frequently asked questions about Nebo Watershed Lake
Where is Nebo Watershed Lake?
- Nebo Watershed Lake is a lake in Jackson County, Kansas. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Nebo Watershed Lake?
- Nebo Watershed Lake in Jackson County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.5 ft visibility. Phosphorus: 120 µg/L. Chlorophyll-a (algae): 43 µg/L. Surface area: 38.12 acres.
Is Nebo Watershed Lake safe to swim in?
- The letter is not a swimming clearance. Nebo Watershed Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
5 measurements from 1 monitoring station, 2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX5 samples · 2017
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database