Lake Nockamixon
Bucks County, WisconsinLimited DataEutrophic
Lake Nockamixon is a 1,450-acre productive, nutrient-rich eutrophic lake in Bucks County, PA. Water quality is graded D based on 1 sampling years through 2023.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2023-07-23. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 4.8 ft. Trophic State Index: 55.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.8 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 55 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1.4K acres |
Location
County Ranking
Ranked #1 of 1 lakes in Bucks County
Nearby Lakes in Bucks County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lake Nockamixon is a man-made reservoir impounded by the Nockamixon (completed 1973), built primarily for recreation on the TOHICKON CREEK; rockfill-type dam, 112 ft tall and 1,511 ft long.
- Surface area
- 1,450 ac
- Normal storage
- 40,000 ac-ft
- Max storage
- 71,000 ac-ft
- Drainage area
- 73.3 sq mi
- Hazard class
- High
- Owner
- DCNR
All listed purposes: Recreation;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID PA00734 · Operator website
EPA Impairment Status
Lake Nockamixon 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 PA-LRP-02040105003977 · Official waterbody report · Matched by proximity (0.43 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-07-23
Monitoring stations: 1