Luknas Ezers

Latvia Lake 1 - Excellent

Luknas Lake at Višķi Technical School village is an inland bathing water body in Latvia. The bathing site is subject to water quality monitoring and management according to EU Directive 2006/7/EK and Latvian regulations. Water quality is assessed based on microbiological criteria including E. coli and intestinal enterococci levels, as well as blue-green algae proliferation. The bathing water profile was developed by the Health Inspection Service in cooperation with the Latvian Environment, Geology and Meteorology Centre.

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Water

Luknas Lake, an inland freshwater body. Physical characteristics including area, depth, and flow rate are addressed in sections 2.1 and 2.2 of the profile but specific measurements are not provided in the extracted text.

Location

Višķi Technical School village, Luknas Lake area. The document does not specify detailed directions or parking information.

Season

15 May to 15 September (official bathing season in Latvia).

Water Quality

Water quality is classified on a four-tier scale: excellent quality, good quality, sufficient quality, and poor quality. Monitoring uses microbiological indicators: E. coli and intestinal enterococci. Swimming is not recommended if E. coli exceeds 1000–3000 CFU/100 ml or enterococci exceed 300–500 CFU/100 ml. Swimming is prohibited if E. coli exceeds 3000 CFU/100 ml or enterococci exceed 500 CFU/100 ml. Long-term quality assessment uses the 95th percentile for excellent (enterococci ≤200 CFU/100 ml, E. coli ≤500 CFU/100 ml) and good quality (enterococci ≤400 CFU/100 ml, E. coli ≤1000 CFU/100 ml), and 90th percentile for sufficient quality (enterococci ≤330 CFU/100 ml, E. coli ≤900 CFU/100 ml).

Risks

Blue-green algae proliferation is identified as a potential risk factor. The profile includes analysis of factors that could promote algal blooms. Point-source and diffuse pollution sources are characterized in the document.