Upper Brown Lake
Upper Brown Lake in Jackson County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 443 acres.
- Area
- 443 acres
- Public access
- Yes
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Why Upper Brown Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Upper Brown Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Iowa DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Upper Brown Lake is a 443-acre lake in Jackson County, Iowa. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Upper Brown Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Upper Brown Lake
Compare lakeside cabins, hotels, and vacation rentals near Upper Brown Lake in Jackson County, Iowa — 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 Upper Brown Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 443 acres |
| Public Access | Yes |
No bathymetric survey has been published for Upper Brown Lake, so its depth is not documented here.
Recreation & Access
- Green Island Wildlife AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Upper Brown Lake
Nearby Lakes in Jackson County
Frequently asked questions about Upper Brown Lake
Where is Upper Brown Lake?
- Upper Brown Lake is a lake in Jackson County, Iowa. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Upper Brown Lake?
- Upper Brown Lake in Jackson County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 443 acres.
Is Upper Brown Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Upper Brown Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Upper Brown Lake?
- Upper Brown Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Green Island Wildlife Area. Public access is listed as yes.
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Where this data comes from
Measurements for Upper Brown Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory