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Muscogee County, Georgia · Water Quality Report Card

Lake Oliver (Aka Chatt River

C
Grade CFair
Mesotrophic

Lake Oliver (Aka Chatt River in Muscogee County, Georgia has a water quality grade of C (Fair). Phosphorus: 21.1 µg/L.

Mean depth
~20 ft est.
Type
Mesotrophic
Trend
Declining

Lake Oliver (Aka Chatt River is a mesotrophic lake in Muscogee County, Georgia with an estimated average depth of about 20 feet. Water quality is graded C based on 1 sampling years through 2026. Overall water quality is declining over recent sampling years. Compared to the 1 other monitored lakes in Muscogee County, Lake Oliver (Aka Chatt River ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Georgia EPD, last sampled 2026-03-03. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C (Fair)

No clarity data. Phosphorus level: 21.1 µg/L. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)No data
Phosphorus21.1 µg/LFair
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Lake Details

CharacteristicValue
Average Depth~20 ft est.

Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Georgia has not published bathymetry for Lake Oliver (Aka Chatt River.

Where to stay near Lake Oliver (Aka Chatt River

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Fishing Lake Oliver (Aka Chatt River

Water Quality Trend: Declining

Based on 14 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.062 m/yr10
Phosphorus Declining+1.17 µg/L/yr6
Chlorophyll-a Declining+0.97 µg/L/yr10
See year-by-year chart →

Location

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County Ranking

Ranked #2 of 2 lakes in Muscogee County

Cleaner Lakes Within 30 Miles

Lake Oliver (Aka Chatt River holds Grade C. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Muscogee County

More records, surveys & data sources

Lake Size & Watershed

Watershed (drainage) area
4,626 sq mi
Surface area
1,626 acres
Mean depth (modeled estimate)
~20 ft est.
Shoreline
22.7 mi
Elevation
341 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.

Where this data comes from

138 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

  • Georgia DNR Environmental Protection Division21GAEPD_WQX138 samples · 2020–2026

Analytical methods

  • Phosphorus by Colorimetry
  • Turbidity by Nephelometry
Monitoring station identifiers (1)

Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.

Data Sources

Water quality data from the EPA Water Quality Portal

Lake size & watershed from HydroLAKES (HydroSHEDS)

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion

Most recent sample: 2026-03-03

Monitoring stations: 1

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