Mallard Marsh
Mallard Marsh in Holt County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 146 acres.
- Area
- 146 acres
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Why Mallard Marsh 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 Mallard Marsh, 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.
Mallard Marsh is a 146-acre lake in Holt County, Missouri.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Mallard Marsh 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 Mallard Marsh
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 Mallard Marsh
Compare lakeside cabins, hotels, and vacation rentals near Mallard Marsh in Holt 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 Mallard Marsh
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 146 acres |
No bathymetric survey has been published for Mallard Marsh, so its depth is not documented here.
Fishing Mallard Marsh
Nearby Lakes in Holt County
Frequently asked questions about Mallard Marsh
Where is Mallard Marsh?
- Mallard Marsh is a lake in Holt 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 Mallard Marsh?
- Mallard Marsh in Holt County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 146 acres.
Is Mallard Marsh safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mallard Marsh 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 Mallard Marsh come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.