Bridgeport Middle Lake
Morrill County, NebraskaView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Oligotrophic
- Impaired · Mercury
- #1 of 1 in the county
- Public access
Bridgeport Middle Lake in Morrill County, Nebraska has a water quality grade of A (Excellent). Water clarity: 18.9 ft visibility. Chlorophyll-a (algae): 2 µg/L.
- Clarity
- 18.9 ft
- Type
- Oligotrophic
- Chlorophyll-a
- 2 µg/L
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Bridgeport Middle Lake’s letter
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Bridgeport Middle Lake is a cold, clear oligotrophic lake in Morrill County, Nebraska. Water quality is graded A based on 1 sampling years through 2024. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, NDEE, last sampled 2024-09-25. Grade methodology: LakeQuality methodology.
What Bridgeport Middle Lake is good for
From access and monitoring records, not editorial picks.
- Clear water18.9 ft of visibility
- Boat launch1 documented ramp
- Camping1 public campground nearby
Swimming Safety
Grade onlyLow algae
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 A is nutrients and algae, not a swimming clearance. Bridgeport Middle Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Crystal clear, you can see 18.9 ft down. Chlorophyll-a 2 µg/L. TSI 36. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 18.9 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 2 µg/L | Good |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Recreation & Access
- Bridgeport State Recreation AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Bridgeport Middle Lake
- Bridgeport State Recreation Area0.4 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Bridgeport Middle Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -12.587 m/yr | 3 |
| Chlorophyll-a | ↓ Declining | +0.14 µg/L/yr | 3 |
EPA Impairment Status
Bridgeport Middle Lake 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 NE-NP3-L0030 · Official waterbody report · Matched by proximity (0.22 km)
County Ranking
Ranked #1 of 1 lakes in Morrill County
Nearby Lakes in Morrill County
Frequently asked questions about Bridgeport Middle Lake
Where is Bridgeport Middle Lake?
- Bridgeport Middle Lake is a lake in Morrill County, Nebraska. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Bridgeport Middle Lake?
- Bridgeport Middle Lake in Morrill County, Nebraska has a water quality grade of A (Excellent). Water clarity: 18.9 ft visibility. Chlorophyll-a (algae): 2 µg/L.
Is Bridgeport Middle Lake safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Bridgeport Middle Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Are there boat ramps on Bridgeport Middle Lake?
- Bridgeport Middle Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Bridgeport State Recreation Area. Public access is listed as yes.
Are there campgrounds on Bridgeport Middle Lake?
- Bridgeport Middle Lake has 1 public campground from USGS The National Map within 5 km, including Bridgeport State Recreation Area. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Bridgeport Middle Lake across LakeQuality
Species activity outlook by water temperature and season
Where to stay at Nebraska's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
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Where this data comes from
38 measurements from 1 monitoring station, 2017–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Nebraska Department of Environment and Energy
21NEB001_WQX38 samples · 2017–2024
Analytical methods
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
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
Public campgrounds from USGS The National Map Structures, within about 3 miles