Antioch Park Lake
Johnson County, KansasView mapDirections
Nutrients and algae run well above the regional average.
- Hypereutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #13 of 13 in the county
Antioch Park Lake in Johnson County, Kansas has a water quality grade of F (Algae-prone). Phosphorus: 347.1 µg/L. Chlorophyll-a (algae): 61.3 µg/L.
- Type
- Hypereutrophic
- Phosphorus
- 347.1 µg/L
- Chlorophyll-a
- 61.3 µg/L
- Trend
- → Stable
Stays via Stay22
Stays near Antioch Park Lake
Compare lakeside cabins, hotels, and vacation rentals near Antioch 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 Antioch Park Lake are listed below.
Top-rated places to stay near Antioch Park Lake
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Watch Antioch Park Lake’s letter
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Antioch 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. Phosphorus level is declining over recent sampling years. Compared to the 12 other monitored lakes in Johnson County, Antioch Park Lake ranks #13 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. Antioch Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pesticides. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
No clarity data. Phosphorus 347.1 µg/L. Chlorophyll-a 61.3 µg/L. TSI 80. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 347.1 µg/L | Poor |
| Chlorophyll-a (Algae) | 61.3 µg/L | Poor |
| Trophic State Index (TSI) | 80 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Fishing Antioch Park Lake
Water Quality Trend: → Stable
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +38.91 µg/L/yr | 8 |
| Chlorophyll-a | ↑ Improving | -5.07 µg/L/yr | 8 |
EPA Impairment Status
Antioch 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
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit KS-LM067701 · Official waterbody report
County Ranking
Ranked #13 of 13 lakes in Johnson County
Nearby Lakes in Johnson County
Frequently asked questions about Antioch Park Lake
Where is Antioch Park Lake?
- Antioch 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 Antioch Park Lake?
- Antioch Park Lake in Johnson County, Kansas has a water quality grade of F (Algae-prone). Phosphorus: 347.1 µg/L. Chlorophyll-a (algae): 61.3 µg/L.
Is Antioch Park Lake safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Antioch Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pesticides. Check local advisories before you swim.
Explore Antioch Park Lake across LakeQuality
More Kansas Lake Rankings
Other Grade F Lakes in Kansas
Hypereutrophic Lakes in Kansas
Where this data comes from
92 measurements from 2 monitoring stations, 2012–2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- EPA R7
EPA_R7_WQX92 samples · 2012–2021
Analytical methods
- Nutrient Analysis
- Chlorophyll a
- Fluorometric Analysis of Chlorophyll a (originally 2334.22A)
Monitoring station identifiers (2)
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