Results of THREE sets of water quality samples done by Enviro Lac Gauvreau volunteers
LAC GAUVREAU TEST RESULTS FOR JUNE, JULY & AUGUST, 2022
- E.coli - Bacteria (E.coli) samples from all lake testing sites in June, July and August indicate levels well within those considered safe for swimming. Although Parent Creek levels are extremely high, the E.coli reading at Site 5 at the creek's outlet into the lake is low.
- Total Phosphorus (TP) - Sampling from three sites in June indicated a range from 17 to 20 (μg/L), the highest being in Parent Creek (Site 6). July and August results from only two locations (Sites 5 and 6) show that warmer temperatures and greater boating activity may have resulted in the much higher phosphorous levels, doubling in Parent Creek.
- According to the table below (source), Total Phosphorus (TP) levels place Lac Gauvreau at the threshold between Mesotrophic and Eutrophic. Mesotrophic lakes have an intermediate level of productivity. These lakes are commonly clear water lakes and ponds with beds of submerged aquatic plants and medium levels of nutrients. Eutrophic lakes have high biological productivity with excessive levels of nitrogen and phosphorus that support an abundance of aquatic plants and algae. Occasionally, an excessive algal bloom will occur.
RSVL TEST RESULTS FOR JUNE, 2022 SAMPLES
INTERPRETATIONS AVAILABLE AT THE END OF THE SEASON ONLY
WHAT IS RSVL?