Mountain Island Lake
Mountain Island Lake in Gaston County, North Carolina is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1962 acres.
- Area
- 1,962 acres
- Public access
- Yes
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Why Mountain 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 Mountain 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 NCDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Mountain Island Lake is a 1,962-acre lake in Gaston County, North Carolina. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, NCDEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Mountain Island Lake water quality
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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 Mountain 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 Mountain Island Lake
Compare lakeside cabins, hotels, and vacation rentals near Mountain Island Lake in Gaston County, North Carolina — 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 Mountain Island Lake
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Planning a whole trip? See where to stay at North Carolina’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,962 acres |
| Public Access | Yes |
No bathymetric survey has been published for Mountain Island Lake, so its depth is not documented here.
Recreation & Access
- Neck RoadPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Mountain Island Lake
Nearby Lakes in Gaston County
Frequently asked questions about Mountain Island Lake
Where is Mountain Island Lake?
- Mountain Island Lake is a lake in Gaston County, North Carolina. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Mountain Island Lake?
- Mountain Island Lake in Gaston County, North Carolina is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1962 acres.
Is Mountain Island Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mountain 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.
Are there boat ramps on Mountain Island Lake?
- Mountain Island Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Neck Road. Public access is listed as yes.
Explore Mountain Island Lake across LakeQuality
More North Carolina Lake Rankings
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Grade A/B + low algae filter
Panfish-rich, public access
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Where this data comes from
Measurements for Mountain Island 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