Lake Maria is a lake in Green Lake County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.

Are there boat ramps on Lake Maria?

Lake Maria has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Maria. Public access is listed as yes.

Lake Maria

Not yet rated

563 acres

Lake Maria in Green Lake County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 563 acres.

Area: 563 acres
Public access: Yes

Where to stay →Safe to swim?

Next lake in Green Lake County

DLittle Green Lake3.2 ft clear · Green Lake CountyView →

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Why Lake Maria 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 Lake Maria, 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 WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.

Lake Maria is a 563-acre lake in Green Lake County, Wisconsin. Limited fish-species data available. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.

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Swimming Safety

Not rated

Elevated nutrients

Not rated for swimming — there is not enough monitoring data to judge this lake

Compare the safest swimming lakes near Oshkosh →

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Water quality measurements for Lake Maria

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 Lake Maria

Compare lakeside cabins, hotels, and vacation rentals near Lake Maria in Green Lake County, Wisconsin — 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 Lake Maria

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Lake Details

Characteristic	Value
Surface Area	563 acres
Public Access	Yes

No bathymetric survey has been published for Lake Maria, so its depth is not documented here.

Recreation & Access

Boat Landings

Yes

Public Access

Lake MariaPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Fishing Lake Maria

→ Lake Maria fishing regulations (limits, seasons, special rules)

Nearby Lakes in Green Lake County

DLittle Green Lake3.2 ft clear · EutrophicView →NRGrand LakeView →NRSpring LakeView →DCounty K Marsh LakeHypereutrophicView →NRBig Twin Lake7 ft clearView →NRLittle Twin Lake1.5 ft clearView →

Frequently asked questions about Lake Maria

Where is Lake Maria?: Lake Maria is a lake in Green Lake County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lake Maria?: Lake Maria in Green Lake County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 563 acres.
Is Lake Maria safe to swim in?: Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Maria 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 Lake Maria?: Lake Maria has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Maria. Public access is listed as yes.