Colwich City Lake
Sedgwick County, Kansas8 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.
- Limited data
Colwich City Lake in Sedgwick County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.8 ft visibility. Phosphorus: 900 µg/L. Surface area: 8.04 acres.
- Clarity
- 0.8 ft
- Area
- 8 acres
- Phosphorus
- 900 µg/L
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Watch Colwich City Lake’s letter
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Why Colwich City 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 Colwich City Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not 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.
Colwich City Lake is a 8-acre lake in Sedgwick County, Kansas.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2013-07-15. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Colwich City Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 0.8 ft of visibility. Phosphorus 900 µg/L. TSI 91.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.8 ft | Not graded |
| Phosphorus | 900 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 91 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 8 acres |
No bathymetric survey has been published for Colwich City Lake, so its depth is not documented here.
Fishing Colwich City Lake
Reservoir Info (USACE NID)
Colwich City Lake is a man-made reservoir impounded by the Colwich Park Dam (completed 2008) on the Cowskin Creek-Tr; earth-type dam, 10 ft tall and 1,797 ft long.
- Surface area
- 8.04 ac
- Normal storage
- 73.5 ac-ft
- Max storage
- 170.85 ac-ft
- Drainage area
- 0.49 sq mi
- Hazard class
- High
- Owner
- COLWICH, CITY OF
Source: USACE National Inventory of Dams, NID ID KS09310 · Operator website · Matched by proximity (0.11 km)
Graded lakes near Colwich City Lake
Colwich City Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Sedgwick County
Frequently asked questions about Colwich City Lake
Where is Colwich City Lake?
- Colwich City Lake is a lake in Sedgwick 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 Colwich City Lake?
- Colwich City Lake in Sedgwick County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 0.8 ft visibility. Phosphorus: 900 µg/L. Surface area: 8.04 acres.
Is Colwich City Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Colwich City Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2013. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX2 samples · 2013
Analytical methods
- Depth, Secchi disk depth
- Phosphorus by Colorimetry
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.