Prepared by: Bonia Miljavac 
Date of last change: March 2017

Purpose and justification of the indicator

One of the most important goals of public health is to provide everyone with access to safe drinking water, in sufficient quantities and at low cost. Providing access to safe drinking water is one of the first preventive measures that have historically contributed to improving health and extending the average length of life.
The microbiological quality of drinking water plays a decisive role in the prevention of the occurrence, development and spread of intestinal infectious diseases, and more broadly, all other infectious diseases, as it represents the basic condition for maintaining personal hygiene and sanitary-hygienic conditions in the internal and external environment (residential, working, educational and protective, leisure...).

Definition of indicator

Proportion of residents who have access to drinking water of good microbiological quality from supply areas that are included in the national drinking water monitoring program.

Unit of measure

Calculation of the indicator

Indicator Microbiological quality of drinking water is the ratio between the number of inhabitants who are supplied with drinking water of very good or good quality (indicators of fecal pollution are not present, or are present in no more than 5% of samples during the observed period) and the number of all inhabitants of the municipality, multiplied by 100 As a rule, at least a three-year set of data from the national drinking water monitoring database is used for the calculation.
Microbiological quality of drinking water
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Data sources for Slovenia

The source of data on the results of microbiological testing of drinking water is the NLZOH database: Monitoring of drinking water - <a href="http://www.mpv.si/">http://www.mpv.si/</a>
Data on the way residents are supplied with drinking water (number of users in the supply area(s) in the settlement) are obtained from waterworks operators and/or municipalities.
The source of population data is SURS.

Time availability

The indicator is expected to be published annually from 2016 onwards.
The Drinking Water Monitoring database has been published annually since 2013.

Men in literature

<ol>
<li>National Laboratory for Environment, Health and Food. Drinking water monitoring. Available on 29/09/2016 at <a href="http://www.mpv.si/">http://www.mpv.si/</a></li>
<li>Agency of the Republic of Slovenia for the Environment. Environmental indicators in Slovenia. Access to safe drinking water. Available on 29/09/2016 at <a href="http://kazalci.arso.gov.si/?data=indicator&amp;ind_id=707">http://kazalci.arso.gov.si/?data=indicator&amp;ind_id=707</a></li>
<li>WHO. Guidelines for drinking-water quality, fourth edition. 2011. Accessed 29/09/2016 at <a href="http://www.who.int/water_sanitation_health/publications/2011/dwq_guidelines/en/">http://www.who.int/water_sanitation_health/publications/2011/dwq_guidelines/en/</a></li>
</ol>

Notes

The number of microbiological tests of water samples is limited by the national drinking water monitoring program. Only this is low in the case of smaller systems (&lt; 500 users) (two samples/year), which can affect the correctness of the interpretation of the statistical value of the proportion of suitability/unsuitability of samples, or drinking water quality assessments for these systems.
The monitoring database does not contain data on most water supply systems that supply less than 50 inhabitants, including their own supply of drinking water, so they are not taken into account in the calculation of the indicator.

Preventive

Prepared by: Metka Zaletel 
Date of last modification: September 2016

Residents and community

Prepared by: Mojca Simončič and Metka Zaletel 
Date of last change: January 2018

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Date of last change: September 2016

Prepared by: Mojca Simončič 
Date of last change: March 2017

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Date of last modification: September 2016

Health risk factors

Prepared by: Gregor Starc, Kristina Orožen 
Date of last change: September 2016

Prepared by: Tina Lesnik 
Date of last change: March 2021

Prepared by: Andreja Belščak 
Date of last change: September 2016

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Date of last change: March 2017

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Date of last change: March 2021

Prepared by: Martin Ranfl, Jona Bambič 
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Date of last change: March 2019

Prepared by: Jasmina Staroveški Anderlič 
Date of last change: March 2020

Prepared by: Victoria Zakrajšek 
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Prepared by: Victoria Zakrajšek 
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Prepared by: Victoria Zakrajšek and Sonja Tomšič 
Date of last change: March 2017

Prepared by: Sonja Tomšič 
Date of last change: November 2019

Prepared by: Sonja Tomšič 
Date of last change: March 2021

Health status

Prepared by: Victoria Zakrajšek 
Date of last change: March 2017

Prepared by: Aleš Korošec 
Date of last change: September 2016

Prepared by: Aleš Korošec
Date of last change: September 2016

Prepared by: Tatjana Kofol Bric 
Date of last change: March 2019

Prepared by: Aleš Korošec and Sonja Tomšič 
Date of last change: September 2016

Prepared by: Mojca Simončič and Metka Zaletel 
Date of last change: October 2019

Prepared by: Kristina Orožen 
Date of last change: March 2019

Prepared by: Tatjana Kofol Bric, Jona Bambič 
Date of last change: March 2018

Prepared by: Victoria Zakrajšek, Tatjana Kofol Bric 
Date of last change: February 2020

Prepared by: Ema Ahačič 
Date of last change: April 2023

Prepared by: Ema Ahačič 
Date of last change: March 2023

Mortality

Prepared by: Sonja Tomšič, Tatjana Kofol Bric 
Date of last change: March 2019

Prepared by: Sonja Tomšič 
Date of last change: March 2019

Prepared by: Tina Lesnik 
Date of last change: March 2019

Prepared by: Tina Lesnik 
Date of last change: March 2020