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[Hygiene of bathing waters].

P R Schindler1

  • 1Landesuntersuchungsamt für das Gesundheitswesen Südbayern, Oberschleissheim.

Gesundheitswesen (Bundesverband Der Arzte Des Offentlichen Gesundheitsdienstes (Germany))
|September 5, 2001
PubMed
Summary

South Bavarian lakes are safe for bathing, with few exceedances of EU water quality standards. Rivers pose a higher risk, and ongoing monitoring is crucial to manage fecal pollution in bathing waters.

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Area of Science:

  • Environmental microbiology
  • Public health
  • Water quality assessment

Background:

  • Bathing water quality is assessed using European Community (EC) Directive 76/160/EC standards.
  • Previous monitoring indicated low exceedance rates in South Bavarian lakes.
  • River waters showed higher levels of non-compliance with bathing water standards.

Purpose of the Study:

  • To evaluate the bathing water quality of South Bavarian lakes and rivers.
  • To assess the effectiveness of current hygienic parameters and propose revisions.
  • To identify emerging microbial threats in bathing waters.

Main Methods:

  • Water quality monitoring of lakes and rivers from 1990 to 1999.
  • Analysis of bacterial indicators: total coliforms, Escherichia coli, fecal streptococci.
  • Detection of specific pathogens: Enterohaemorrhagic E. coli and thermophilic campylobacters.

Main Results:

  • Lakes rarely exceeded EC limit values (0.3-2.1%), while rivers frequently did (17-35.3%).
  • Total coliforms proved useful in detecting fecal pollution events not indicated by E. coli.
  • Over 50% of lake samples exceeded future fecal streptococci limits; pathogens were detected in 2-17.4% of samples.

Conclusions:

  • South Bavarian lakes are generally safe for bathing, but rivers require caution.
  • Total coliforms should remain a key hygienic parameter for bathing water monitoring.
  • Minimizing fecal pollution sources is essential to ensure bathing water safety, especially given the presence of pathogens.

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