Cedar Creek Reservoir
Bourbon County, Kansas222 acresView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
↑ up from B at the last regrade
- Mesotrophic
- #1 of 1 in the county
- Limited data
Cedar Creek Reservoir in Bourbon County, Kansas has a water quality grade of A (Excellent). Water clarity: 8.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.5 µg/L. Surface area: 222.12 acres.
- Clarity
- 8.2 ft
- Area
- 222 acres
- Type
- Mesotrophic
- Phosphorus
- 20 µg/L
- Chlorophyll-a
- 6.5 µg/L
- Trend
- ↓ Declining
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Watch Cedar Creek Reservoir’s letter
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Cedar Creek Reservoir is a 222-acre mesotrophic lake in Bourbon County, Kansas. Water quality is graded A based on 1 sampling years through 2017. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2017-06-06. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Moderate clarity, visible to about 8.2 ft. Phosphorus 20 µg/L. Chlorophyll-a 6.5 µg/L. TSI 48. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.2 ft | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 6.5 µg/L | Good |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 222 acres |
No bathymetric survey has been published for Cedar Creek Reservoir, so its depth is not documented here.
Fishing Cedar Creek Reservoir
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Chlorophyll-a | ↓ Declining | +0.95 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Cedar Creek Reservoir is a man-made reservoir impounded by the N-1 (completed 2002), built primarily for flood risk reduction on the Cedar Creek; earth-type dam, 64 ft tall and 1,600 ft long.
- Surface area
- 222.12 ac
- Normal storage
- 4,055.5 ac-ft
- Max storage
- 10,705.1 ac-ft
- Drainage area
- 12.63 sq mi
- Hazard class
- Low
- Owner
- MARMATON WJD NO 102
All listed purposes: Flood Risk Reduction;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID KS09053 · Operator website
County Ranking
Ranked #1 of 1 lakes in Bourbon County
Nearby Lakes in Bourbon County
Frequently asked questions about Cedar Creek Reservoir
Where is Cedar Creek Reservoir?
- Cedar Creek Reservoir is a lake in Bourbon County, Kansas. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Cedar Creek Reservoir?
- Cedar Creek Reservoir in Bourbon County, Kansas has a water quality grade of A (Excellent). Water clarity: 8.2 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 6.5 µg/L. Surface area: 222.12 acres.
Is Cedar Creek Reservoir safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Cedar Creek Reservoir across LakeQuality
More Kansas Lake Rankings
Other Grade A Lakes in Kansas
Mesotrophic Lakes in Kansas
Where this data comes from
7 measurements from 1 monitoring station, 2015–2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX7 samples · 2015–2017
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.