Sar Ko Park Lake
Johnson County, KansasView mapDirections
Nutrients and algae run well above the regional average.
↓ down from D at the last regrade
- Hypereutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #8 of 13 in the county
Sar Ko Park Lake in Johnson County, Kansas has a water quality grade of F (Algae-prone). Phosphorus: 86.5 µg/L. Chlorophyll-a (algae): 51.9 µg/L.
- Type
- Hypereutrophic
- Phosphorus
- 86.5 µg/L
- Chlorophyll-a
- 51.9 µg/L
- Trend
- ↓ Declining
Stays via Stay22
Stays near Sar Ko Park Lake
Compare lakeside cabins, hotels, and vacation rentals near Sar Ko Park Lake in Johnson County, Kansas — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Sar Ko Park Lake are listed below.
Top-rated places to stay near Sar Ko Park Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
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Watch Sar Ko Park Lake’s letter
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Sar Ko Park Lake is a highly nutrient-loaded hypereutrophic lake in Johnson County, Kansas. Water quality is graded F based on 2 sampling years through 2021. Overall water quality is declining over recent sampling years. Compared to the 12 other monitored lakes in Johnson County, Sar Ko Park Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2021-09-14. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyAlgae risk
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 F is nutrients and algae, not a swimming clearance. Sar Ko Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
No clarity data. Phosphorus 86.5 µg/L. Chlorophyll-a 51.9 µg/L. TSI 69. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 86.5 µg/L | Poor |
| Chlorophyll-a (Algae) | 51.9 µg/L | Poor |
| Trophic State Index (TSI) | 69 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Fishing Sar Ko Park Lake
Water Quality Trend: ↓ Declining
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +52.13 µg/L/yr | 8 |
| Chlorophyll-a | ↓ Declining | +4.53 µg/L/yr | 8 |
EPA Impairment Status
Sar Ko Park 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-LM062501 · Official waterbody report · Matched by proximity (0.01 km)
County Ranking
Ranked #8 of 13 lakes in Johnson County
Nearby Lakes With Higher Grades
Sar Ko Park Lake holds Grade F. 2 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Johnson County
Frequently asked questions about Sar Ko Park Lake
Where is Sar Ko Park Lake?
- Sar Ko Park Lake is a lake in Johnson County, Kansas. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Sar Ko Park Lake?
- Sar Ko Park Lake in Johnson County, Kansas has a water quality grade of F (Algae-prone). Phosphorus: 86.5 µg/L. Chlorophyll-a (algae): 51.9 µg/L.
Is Sar Ko Park Lake safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Sar Ko Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Explore Sar Ko Park Lake across LakeQuality
More Kansas Lake Rankings
Other Grade F Lakes in Kansas
Hypereutrophic Lakes in Kansas
Where this data comes from
46 measurements from 1 monitoring station, 2012–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- EPA R7
EPA_R7_WQX46 samples · 2012–2021
Analytical methods
- Nutrient Analysis
- Chlorophyll a
- Fluorometric Analysis of Chlorophyll a (originally 2334.22A)
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