Rock Island Lake
Rock Island Lake in Johnson County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 33 acres.
- Area
- 33 acres
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Why Rock Island 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 Rock Island 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 Missouri DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Rock Island Lake is a 33-acre lake in Johnson County, Missouri.
Source: EPA Water Quality Portal sampling records, Missouri 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 Rock Island 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 Rock Island Lake
Compare lakeside cabins, hotels, and vacation rentals near Rock Island Lake in Johnson County, Missouri — 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 Rock Island Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 33 acres |
No bathymetric survey has been published for Rock Island Lake, so its depth is not documented here.
Fishing Rock Island Lake
Nearby Lakes in Johnson County
Frequently asked questions about Rock Island Lake
Where is Rock Island Lake?
- Rock Island Lake is a lake in Johnson County, Missouri. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Rock Island Lake?
- Rock Island Lake in Johnson County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 33 acres.
Is Rock Island Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Rock Island Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Rock Island Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.