*Note to table VD8-1:

1-Due to changes in sampling methodology - a different number of samples in each of the years in the size range of 50-500 inhabitants - is not possible to estimate the trend for small supply areas ; improvement can be misleading.

2 For smaller supply areas ( 50 to 500 population) were large differences in the number of samples taken for routine tests , the provisioning area , in individual years : in 2004-2005 were taken after 4 samples , in 2006-2009 one sample from 2010 onwards for 2 samples ; smaller supply areas and will also contribute the majority of non-compliant samples for E. coli.

* Note to the table VD8-3:

¹On the small supply areas periodical tests are carried out in the supply areas with 501 - 1000 residents. On supply areas with 50-500 inhabitants periodical tests carried out only in 5-10% of supply areas in the 2006-2010 period - each year on the other , and at 10 % in 2014.

In the years 2004 - 2005 and 2011 - 2013 sporadic trials in supply areas with 50-500 inhabitants are not implemented , and therefore show a trend common in small supply areas is not possible.

² In 2011, the Monitoring of nitrates or pesticides is carried on the supply areas where in the recent years their presence was detected and there was a possibility that will occur above the 25 mg / loz . 0.05 g / l , so data over the years can not be directly compared.

³ In 2013 and 2017, the monitoring of pesticides has not been implemented in all supply areas , which are otherwise conducted periodic tests of chemical parameters.

* Note to Figure VD8-4:

¹ Number of inhabitants refers to the supply areas in which a certain pesticide or more pesticides has been exceeded in drinking water.

* Note to Figure VD8-5:

¹ Number of inhabitants refers to the supply areas in which nitrates have been exceeded in drinking water.