Ontario Millpond
Ontario Millpond in LaGrange County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 149 acres.
- Area
- 149 acres
- Public access
- Yes
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Why Ontario Millpond 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 Ontario Millpond, 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 IDEM and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Ontario Millpond is a 149-acre lake in LaGrange County, Indiana. Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Ontario Millpond 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 Ontario Millpond
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 Ontario Millpond
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Top-rated places to stay near Ontario Millpond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 149 acres |
| Public Access | Yes |
No bathymetric survey has been published for Ontario Millpond, so its depth is not documented here.
Recreation & Access
- Pigeon River Fish & Wildlife Area - Skip's BridgePublic
- Pigeon RiverPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Ontario Millpond
Nearby Lakes in LaGrange County
Frequently asked questions about Ontario Millpond
Where is Ontario Millpond?
- Ontario Millpond is a lake in LaGrange County, Indiana. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Ontario Millpond?
- Ontario Millpond in LaGrange County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 149 acres.
Is Ontario Millpond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Ontario Millpond 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 Ontario Millpond?
- Ontario Millpond has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Pigeon River Fish & Wildlife Area - Skip's Bridge, Pigeon River. Public access is listed as yes.
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Where this data comes from
Measurements for Ontario Millpond 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