Public record in progress — measurements for this lake are being compiled.
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Lake Pulse

Lake Marion Water Quality

Lake Marion (South Carolina) water quality: public measurements, when they were taken, and what's still missing.

Surface area
110,000 acres
Maximum depth
Not yet on record
Counties
Clarendon, Berkeley, Calhoun, Orangeburg, Sumter
Nearest town
Santee
Lake type
Reservoir
HUC-8 watershed
Not yet on record
HUC-12 watershed
Not yet on record
Location
33.50° N, 80.30° W
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Lake Atlas launches November 1, 2026.

Full lake records unlock on November 1, 2026. What follows is a preview.

Advisories & Listings

Most recent update

Not on public record

Sources & methods →

What state and federal agencies have on record for Lake Marion.

Source links remain available when a lake is not listed or its status is not on public record. A source link does not establish a lake-specific listing. Lakes can be added to or removed from agency lists between Lake Atlas updates. Lake Atlas is updated quarterly, not daily. Always check with the issuing agency for current advisories before you swim or eat fish.

To see this lake's full advisory and listing history, get Atlas Pass →Live on or near Lake Marion? Join your lake's Lake Pulse community →

Something missing or not accurate? Contact Lake Pulse.

Lake Profile

Public facts about Lake Marion.

Name (and other names)
Lake MarionSample · Source: Not on public record
State
South CarolinaSample · Source: Not on public record
County
Clarendon, Berkeley, Calhoun, Orangeburg, SumterSample · Source: Not on public record
Nearest community
SanteeSample · Source: Not on public record
Latitude / longitude
33.50° N, 80.30° WSample · Source: Not on public record
Surface area (acres)
110,000 acresSample · Source: Not on public record
Maximum depth (ft)
Not on public record
Mean depth (ft)
Not on public record
Shoreline length (mi)
Not on public record
Elevation (ft)
Not on public record
Lake type
ReservoirSample · Source: Not on public record
State waterbody ID
Not on public record
HUC-8 watershed
Not on public record
HUC-12 subwatershed
Not on public record
Major river basin
Not on public record
EPA Level III ecoregion
Not on public record
Public access
Not on public record

Something missing or not accurate? Contact Lake Pulse.

Water Quality Record

The most recent public value for each key measure, with its date and source.

  • Clarity

    Not on public record

    Not on public record

    Collected: Not on public record
    Record age
    Not on public record
    Source
    Not on public record

  • Nutrients

    Not on public record

    Not on public record

    Collected: Not on public record
    Record age
    Not on public record
    Source
    Not on public record

  • Algae & Blooms

    Not on public record

    Not on public record

    Collected: Not on public record
    Record age
    Not on public record
    Source
    Not on public record

  • Oxygen

    Not on public record

    Not on public record

    Collected: Not on public record
    Record age
    Not on public record
    Source
    Not on public record

  • Bacteria

    Not on public record

    Not on public record

    Collected: Not on public record
    Record age
    Not on public record
    Source
    Not on public record

  • Invasive Species

    Not on public record

    Not on public record

    Collected: Not on public record
    Record age
    Not on public record
    Source
    Not on public record

Values come from public agency, university and federal monitoring and reflect conditions on the date sampled. Older values are shown with their dates. This is not an inspection or disclosure, and Lake Pulse does not verify third-party data.

Something missing or not accurate? Contact Lake Pulse.

About Lake Marion

The lake

Not on public record

Know a good source on this lake's history? Tell us.

Something missing or not accurate? Contact Lake Pulse.

About Lake Atlas

Lake Atlas is the public record for thousands of lakes in the lower 48, gathering water quality data, advisories and lake facts from state agencies, universities and federal sources into one open page per lake. It's built for anyone who needs to know a lake before they act: residents and lake associations, buyers and real estate agents, anglers and swimmers, consultants and lake managers, and the agencies whose data it credits. If you live on or near this lake and it's the one you care about most, join this lake's Lake Pulse community for the data, testing and insights on its lake health and safety that aren't available in Atlas.

Sources & methods

Lake Pulse is independent. We don't sell treatments and have no stake in what the data shows. We never share a lake's private data — everything on this page comes from publicly available sources.

    Are we missing data on Lake Marion?

    Agencies, associations and residents: if you know a public source we haven't included, tell us.

    Contact

    Every value on this page comes from public sources and is shown with its date. This page is not an inspection, certification or disclosure. Check with local authorities before swimming or eating fish. Lake Pulse never shares a lake's private data.

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