Johnson Lake is a productive, nutrient-rich eutrophic lake in Gosper County, Nebraska. Water quality is graded C based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Gosper County, Johnson Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Nebraska DNR, last sampled 2024-09-26. Grade methodology: LakeGrade methodology.
Watch Johnson Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Very murky, less than 2.8 ft of visibility. Phosphorus level: 62.3 µg/L. Chlorophyll-a: 11.3 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.8 ft | F |
| Phosphorus | 62.3 µg/L | D |
| Chlorophyll-a (Algae) | 11.3 µg/L | C |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Johnson Lake
Compare lakeside cabins, hotels, and vacation rentals near Johnson Lake in Gosper County, Nebraska — 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.
Top-rated places to stay near Johnson Lake
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 trip to Johnson Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Johnson Lake — straight to your inbox. No spam, unsubscribe anytime.
Fishing Johnson Lake
Location
County Ranking
Ranked #2 of 2 lakes in Gosper County
Nearby Lakes in Gosper County
Explore Johnson Lake across LakeGrade
More Nebraska Lake Rankings
Other Grade C Lakes in Nebraska
Eutrophic Lakes in Nebraska
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-26
Monitoring stations: 2