Atchison County Park Lake
Atchison County, KansasView 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
Atchison County Park Lake in Atchison County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.2 ft visibility. Phosphorus: 280 µg/L. Chlorophyll-a (algae): 28 µg/L.
- Clarity
- 1.2 ft
- Phosphorus
- 280 µg/L
- Chlorophyll-a
- 28 µg/L
- Trend
- ↑ Improving
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Watch Atchison County Park Lake’s letter
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Why Atchison County Park 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 Atchison County Park 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.
Atchison County Park Lake is a lake in Atchison County, Kansas. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2016-06-21. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Atchison County Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), sediment / turbidity. Check local advisories before you swim.
Water quality measurements for Atchison County Park Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1.2 ft of visibility. Phosphorus 280 µg/L. Chlorophyll-a 28 µg/L. TSI 74.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 ft | Not graded |
| Phosphorus | 280 µg/L | Not graded |
| Chlorophyll-a (Algae) | 28 µg/L | Not graded |
| Trophic State Index (TSI) | 74 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Fishing Atchison County Park Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.045 m/yr | 2 |
| Phosphorus | → Stable | +4.75 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -0.95 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Atchison County Park Lake is a man-made reservoir impounded by the (completed 1935), built primarily for recreation on the Clear Creek; earth-type dam, 40 ft tall and 1,330 ft long.
- Normal storage
- 816 ac-ft
- Max storage
- 1,134 ac-ft
- Hazard class
- Low
- Owner
- ATCHISON COUNTY
Source: USACE National Inventory of Dams, NID ID KS02537 · Operator website · Matched by proximity (0.31 km)
EPA Impairment Status
Atchison County 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-LM060601 · Official waterbody report · Matched by proximity (0.62 km)
Graded lakes near Atchison County Park Lake
Atchison County Park Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Atchison County
Frequently asked questions about Atchison County Park Lake
Where is Atchison County Park Lake?
- Atchison County Park Lake is a lake in Atchison 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 Atchison County Park Lake?
- Atchison County Park Lake in Atchison County, Kansas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.2 ft visibility. Phosphorus: 280 µg/L. Chlorophyll-a (algae): 28 µg/L.
Is Atchison County Park Lake safe to swim in?
- The letter is not a swimming clearance. Atchison County Park Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), sediment / turbidity. Check local advisories before you swim.
Explore Atchison County Park Lake across LakeQuality
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Where this data comes from
5 measurements from 1 monitoring station, 2016. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX5 samples · 2016
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