Guilford Lake
Guilford Lake in Columbiana County, Ohio is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 328 acres.
- Area
- 328 acres
- Public access
- Yes
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Why Guilford 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 Guilford 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 Ohio EPA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Guilford Lake is a 328-acre lake in Columbiana County, Ohio. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Ohio 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 Guilford 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 Guilford Lake
Compare lakeside cabins, hotels, and vacation rentals near Guilford Lake in Columbiana County, Ohio — 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 Guilford Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 328 acres |
| Public Access | Yes |
No bathymetric survey has been published for Guilford Lake, so its depth is not documented here.
Recreation & Access
- Guilford Lake State Park - Campground SidePublic
- Guilford Lake State Park - Red Maple AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Guilford Lake
Nearby Lakes in Columbiana County
Frequently asked questions about Guilford Lake
Where is Guilford Lake?
- Guilford Lake is a lake in Columbiana County, Ohio. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Guilford Lake?
- Guilford Lake in Columbiana County, Ohio is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 328 acres.
Is Guilford Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Guilford 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 Guilford Lake?
- Guilford Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Guilford Lake State Park - Campground Side, Guilford Lake State Park - Red Maple Area. Public access is listed as yes.
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Where this data comes from
Measurements for Guilford 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