Lake Concordia
Lake Concordia in Concordia Parish County, Louisiana has a water quality grade of D (Nutrient-rich). Phosphorus: 220 µg/L.
- Type
- Hypereutrophic
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Lake Concordia →
Lake Concordia is a highly nutrient-loaded hypereutrophic lake in Concordia Parish County, Louisiana. Water quality is graded D based on 1 sampling years through 2023. Public access is available with 2 public boat landings. Compared to the 2 other monitored lakes in Concordia Parish County, Lake Concordia ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-10-03. Grade methodology: LakeGrade methodology.
Watch Lake Concordia water quality
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Swimming Safety
Grade onlyBacteria advisory
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
No clarity data. Phosphorus level: 220 µg/L. Trophic State Index: 82.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 220 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 82 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Lake Concordia
Compare lakeside cabins, hotels, and vacation rentals near Lake Concordia in Concordia Parish County, Louisiana — 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Lake Concordia are listed below.
Top-rated places to stay near Lake Concordia
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Recreation & Access
- Oak Harbor RV ParkSemi-private
- Sportsman's LodgeSemi-private
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Lake Concordia
EPA Impairment Status
Lake Concordia is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit LA101605_00 · Official waterbody report · Matched by proximity (2.71 km)
County Ranking
Ranked #3 of 3 lakes in Concordia Parish County
Nearby Lakes in Concordia Parish County
Frequently asked questions about Lake Concordia
Where is Lake Concordia?
- Lake Concordia is a lake in Concordia Parish County, Louisiana. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Concordia?
- Lake Concordia in Concordia Parish County, Louisiana has a water quality grade of D (Nutrient-rich). Phosphorus: 220 µg/L.
Is Lake Concordia safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Lake Concordia has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Are there boat ramps on Lake Concordia?
- Lake Concordia has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Oak Harbor RV Park, Sportsman's Lodge.
Explore Lake Concordia across LakeGrade
More Louisiana Lake Rankings
Other Grade D Lakes in Louisiana
Catahoula Parish County · Nutrient-rich
Catahoula Parish County · Nutrient-rich
Franklin Parish County · Nutrient-rich
Tensas Parish County · Nutrient-rich
Tensas Parish County · Nutrient-rich
LaSalle Parish County · Nutrient-rich
Hypereutrophic Lakes in Louisiana
Where this data comes from
20 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- LDEQ/Water Planning and Assessment (Louisiana)
LADEQWPD_WQX20 samples · 2022–2023
Analytical methods
- Total Phosphorus After Block Digestion
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory