Altamont Reservoir
Altamont Reservoir in Effingham County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 42 acres.
- Area
- 42 acres
- Public access
- Yes
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Why Altamont Reservoir 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 Altamont Reservoir, 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 Illinois EPA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Altamont Reservoir is a 42-acre lake in Effingham County, Illinois. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Illinois EPA, 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 Altamont Reservoir
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 Altamont Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Altamont Reservoir in Effingham County, Illinois — 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 Altamont Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 42 acres |
| Public Access | Yes |
No bathymetric survey has been published for Altamont Reservoir, so its depth is not documented here.
Recreation & Access
- Altamont ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Altamont Reservoir
Nearby Lakes in Effingham County
Frequently asked questions about Altamont Reservoir
Where is Altamont Reservoir?
- Altamont Reservoir is a lake in Effingham County, Illinois. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Altamont Reservoir?
- Altamont Reservoir in Effingham County, Illinois is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 42 acres.
Is Altamont Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Altamont Reservoir 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 Altamont Reservoir?
- Altamont Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Altamont Reservoir. Public access is listed as yes.
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Where this data comes from
Measurements for Altamont Reservoir 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