Saldus Ezers

Latvia Lake 1 - Excellent

Saldus Lake is a bathing water body in Latvia subject to water quality monitoring and management under European Directive 2006/7/EK. The bathing water profile describes the lake's physical, geographical, and hydrological characteristics, pollution sources, and water quality status. Water quality is assessed based on microbiological criteria, including E. coli and intestinal enterococci levels, and consideration of cyanobacteria blooms. The profile includes analysis of factors affecting water quality and identifies necessary management measures to achieve at least sufficient water quality classification.

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Water

Saldus Lake, an inland water body in Latvia. The profile addresses the lake's physical-geographical characteristics, hydrological properties, and catchment basin features.

Season

15 May to 15 September

Water Quality

Water quality is classified into four categories: excellent, good, sufficient, and poor. Quality assessment uses microbiological indicators (E. coli and intestinal enterococci) measured in colony-forming units per 100 ml. Excellent quality: intestinal enterococci ≤200 CFU/100 ml, E. coli ≤500 CFU/100 ml (95th percentile). Good quality: intestinal enterococci ≤400 CFU/100 ml, E. coli ≤1000 CFU/100 ml (95th percentile). Sufficient quality: intestinal enterococci ≤330 CFU/100 ml, E. coli ≤900 CFU/100 ml (90th percentile). Operational assessment prohibits swimming if E. coli exceeds 3000 CFU/100 ml or intestinal enterococci exceed 500 CFU/100 ml. Long-term assessment uses data from four previous bathing seasons.

Risks

Excessive cyanobacteria blooms. Fecal pollution from wastewater sources. Diffuse pollution from urbanized areas, traffic, atmospheric deposition, and agricultural land use. Risk factors include areas not connected to centralized wastewater collection and treatment systems.