Lac des Allemands Southwest of Killona Lake
St. John the Baptist Parish County, LouisianaView mapDirections
This is the name LDEQ records for this water. It can describe one sampling location rather than the water as a whole.
LDEQ publishes the water-quality measurements for Lac des Allemands Southwest of Killona Lake. Here is what has been measured.
- Hypereutrophic
- Limited data
Lac des Allemands Southwest of Killona Lake in St. John the Baptist Parish County, Louisiana has water-quality measurements published by LDEQ, shown here as reported. Phosphorus: 410 µg/L. Chlorophyll-a (algae): 44.9 µg/L.
Lac des Allemands Southwest of Killona Lake is a highly nutrient-loaded hypereutrophic lake in St. John the Baptist Parish County, Louisiana.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-09-28. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lac des Allemands Southwest of Killona Lake is safe to swim in today is a call for the Louisiana Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
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Water quality measurements for Lac des Allemands Southwest of Killona Lake
These are the measurements LDEQ publishes for Lac des Allemands Southwest of Killona Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 410 µg/L. Chlorophyll-a 44.9 µg/L. TSI 79.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 410µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 44.9µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 79 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
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Stays near Lac des Allemands Southwest of Killona Lake
Compare lakeside cabins, hotels, and vacation rentals near Lac des Allemands Southwest of Killona Lake in St. John the Baptist 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Lac des Allemands Southwest of Killona Lake are listed below.
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Nearby Lakes in St. John the Baptist Parish County
Frequently asked questions about Lac des Allemands Southwest of Killona Lake
Where is Lac des Allemands Southwest of Killona Lake?
- Lac des Allemands Southwest of Killona Lake is in St. John the Baptist Parish County, Louisiana. This is the name LDEQ records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by LDEQ and shown on this page as reported.
What is the water quality of Lac des Allemands Southwest of Killona Lake?
- Lac des Allemands Southwest of Killona Lake in St. John the Baptist Parish County, Louisiana has water-quality measurements published by LDEQ, shown here as reported. Phosphorus: 410 µg/L. Chlorophyll-a (algae): 44.9 µg/L.
Is Lac des Allemands Southwest of Killona Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
12 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- LDEQ/Water Planning and Assessment (Louisiana)
LADEQWPD_WQX12 samples · 2022
Analytical methods
- Total Phosphorus After Block Digestion
- 10200 H ~ Chlorophyll a-b-c Determination
- Multiple Analytical Methods: Analysis for Total Nutrient using Louisiana Department of Environmental Quality specific me
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.