Anthony City Lake
Harper County, Kansas130 acresView mapDirections
Nutrients and algae run well above the regional average.
↓ down from D at the last regrade
- Hypereutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #1 of 1 in the county
- 31 ft max depth
- Limited data
Anthony City Lake in Harper County, Kansas has a water quality grade of F (Algae-prone). Water clarity: 0.4 ft visibility. Phosphorus: 200.3 µg/L. Chlorophyll-a (algae): 38.6 µg/L. Surface area: 129.9 acres.
- Clarity
- 0.4 ft
- Max depth
- ~31 ft est.
- Area
- 130 acres
- Type
- Hypereutrophic
- Phosphorus
- 200.3 µg/L
- Chlorophyll-a
- 38.6 µg/L
- Trend
- ↓ Declining
Stays via Stay22
Stays near Anthony City Lake
Compare lakeside cabins, hotels, and vacation rentals near Anthony City Lake in Harper 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 Anthony City Lake are listed below.
Top-rated places to stay near Anthony City Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Kansas’s top lakes →
Watch Anthony City Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Anthony City Lake is a 130-acre highly nutrient-loaded hypereutrophic lake in Harper County, Kansas with an estimated average depth of about 31 feet. Water quality is graded F based on 2 sampling years through 2018. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, KDHE, last sampled 2018-07-30. 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 F is nutrients and algae, not a swimming clearance. Anthony City Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO), pH / acidity, sediment / turbidity. Check local advisories before you swim.
Water Quality Grade: F (Algae-prone)
Very murky, less than 0.4 ft of visibility. Phosphorus 200.3 µg/L. Chlorophyll-a 38.6 µg/L. TSI 79. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.4 ft | Not graded |
| Phosphorus | 200.3 µg/L | Poor |
| Chlorophyll-a (Algae) | 38.6 µg/L | Poor |
| Trophic State Index (TSI) | 79 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~31 ft est. |
| Average Depth | ~9 ft est. |
| Surface Area | 130 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Kansas has not published bathymetry for Anthony City Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Anthony City Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.013 m/yr | 2 |
| Phosphorus | ↓ Declining | +26.67 µg/L/yr | 2 |
| Chlorophyll-a | ↑ Improving | -1.48 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Anthony City Lake is a man-made reservoir impounded by the Anthony City Dam (completed 1935), built primarily for recreation on the Spring Creek; earth-type dam, 41 ft tall and 1,680 ft long.
- Surface area
- 129.9 ac
- Normal storage
- 1,210 ac-ft
- Max storage
- 1,915 ac-ft
- Drainage area
- 21.31 sq mi
- Hazard class
- Low
- Owner
- ANTHONY, CITY OF
All listed purposes: Recreation;Fish and Wildlife Pond;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID KS02481 · Operator website
EPA Impairment Status
Anthony City Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit KS-LM048801 · Official waterbody report
County Ranking
Ranked #1 of 1 lakes in Harper County
Nearby Lakes in Harper County
Frequently asked questions about Anthony City Lake
Where is Anthony City Lake?
- Anthony City Lake is a lake in Harper County, Kansas. LakeQuality grades it F for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Anthony City Lake?
- Anthony City Lake in Harper County, Kansas has a water quality grade of F (Algae-prone). Water clarity: 0.4 ft visibility. Phosphorus: 200.3 µg/L. Chlorophyll-a (algae): 38.6 µg/L. Surface area: 129.9 acres.
Is Anthony City Lake safe to swim in?
- The F is nutrients and algae, not a swimming clearance. Anthony City Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), oxygen depletion (low DO), pH / acidity, sediment / turbidity. Check local advisories before you swim.
How deep is Anthony City Lake?
- No published bathymetric survey covers Anthony City Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 31 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 129.9 acres.
Explore Anthony City Lake across LakeQuality
More Kansas Lake Rankings
Other Grade F Lakes in Kansas
Hypereutrophic Lakes in Kansas
Where this data comes from
10 measurements from 1 monitoring station, 2012–2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Kansas Department Of Health And Environment
21KAN001_WQX10 samples · 2012–2018
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
Lake size & watershed from HydroLAKES (HydroSHEDS)