Ball Pond
Ball Pond in Fairfield County, Connecticut has a water quality grade of D (Nutrient-rich). Phosphorus: 44 µg/L. Chlorophyll-a (algae): 3.3 µg/L. Surface area: 2 acres.
- Area
- 2 acres
- Type
- Eutrophic
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Ball Pond →
Ball Pond is a 2-acre productive, nutrient-rich eutrophic lake in Fairfield County, Connecticut. Water quality is graded D based on 2 sampling years through 2023. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 3 other monitored lakes in Fairfield County, Ball Pond ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-06-13. Grade methodology: LakeGrade methodology.
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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.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus level: 44 µg/L. Chlorophyll-a: 3.3 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 44 µg/L | Poor |
| Chlorophyll-a (Algae) | 3.3 µg/L | Not graded |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Ball Pond
Compare lakeside cabins, hotels, and vacation rentals near Ball Pond in Fairfield County, Connecticut — 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 Ball Pond are listed below.
Top-rated places to stay near Ball Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2 acres |
| Public Access | Yes |
No bathymetric survey has been published for Ball Pond, so its depth is not documented here.
Recreation & Access
- Ball PondPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Ball Pond
Reservoir Info (USACE NID)
Ball Pond is a man-made reservoir impounded by the Merten's Mill Pond Dam, built primarily for recreation on the Ball Pond Brook; earth-type dam, 8 ft tall and 100 ft long.
- Surface area
- 2 ac
- Normal storage
- 0 ac-ft
- Drainage area
- 0.95 sq mi
- Hazard class
- Significant
- Owner
- Carriero
Source: USACE National Inventory of Dams, NID ID CT01114 · Operator website · Matched by proximity (0.87 km)
EPA Impairment Status
Ball Pond is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit CT6402-00-1-L1_01 · Official waterbody report · Matched by proximity (0.05 km)
County Ranking
Ranked #4 of 4 lakes in Fairfield County
Nearby Lakes in Fairfield County
Frequently asked questions about Ball Pond
Where is Ball Pond?
- Ball Pond is a lake in Fairfield County, Connecticut. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Ball Pond?
- Ball Pond in Fairfield County, Connecticut has a water quality grade of D (Nutrient-rich). Phosphorus: 44 µg/L. Chlorophyll-a (algae): 3.3 µg/L. Surface area: 2 acres.
Is Ball Pond safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Ball Pond has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 3.3 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Ball Pond?
- Ball Pond has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Ball Pond. Public access is listed as yes.
Explore Ball Pond across LakeGrade
More Connecticut Lake Rankings
Other Grade D Lakes in Connecticut
Eutrophic Lakes in Connecticut
Where this data comes from
10 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Connecticut Department Of Energy And Environmental Protection
CT_DEP01_WQX10 samples · 2023
Analytical methods
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- Nitrate-Nitrite Nitrogen by Colorimetry
- Turbidity by Nephelometry
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
Named boat-access points from the USGS National Boat Ramps inventory