Bulletin 1/2011 - Siempelkamp

Drinking water monitoring: analyses in the laboratory
all functions and forms as well as interfaces.
Different functions help users with
their daily tasks. this includes, for example,
a connection to Outlook which makes the
transfer of the scheduled dates for sampling
into the Outlook calendar possible as
well as the contact management which
includes all institutions registered in tWIStweb.
Via a connection to an external geographical
information system, the exact
location of the monitoring stations can be
displayed on a map.
the flexible and comprehensive analysis
options in tWIStweb offer the user the
opportunity to illustrate temporal and
local changes of substance concentrations
in the drinking water.
Quick reaction to deviations in the
drinking water
One of the most important forms in tWIStweb
is the analysis form. Among other
things, this form gives information about
dates, contracting body, the site where
samples are to be taken, the sampler, and
the number of substances the water is to
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Clean and safe drinking water
be tested for. Once an analysis is declared
complete, tWIStweb automatically checks
all analysis results with the help of predetermined
limit values against deviations.
tWIStweb features a control screen that
provides an overview of all instances when
the limit values were exceeded in completed
analyses. this helps public health
departments and water supply companies
to react quickly to exceeded limits. If the
drinking water ordinance demands a
permit or a special report for the exceeded
limit values, the user is directed to the
correct form. After releasing the form, it
becomes viewable to the next authority. In
the case the limit values are exceeded,
several measures become effective, for
example, by identifying the causes and developing
corrective actions for the affected
population. Furthermore, an estimate is
given regarding the time it will take to
eliminate the cause.
Tool for the quality management
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With the 2009 introduction of the
so-called sampling-scheme for the advance
planning of monitoring drinking water,
nIS reacted to the demand of the EU
directive for representativeness of drinking
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water examinations. the planning provides
improved coordination between laboratories
and water supply companies, for
example, in regard to the sampling points
as well as the number of, the dates for and
the extent of the examinations. the planning
gives water supply companies and
offices the control to find out whether the
scheduled samplings will be in accordance
with legal requirements. In connection with
the different functions for the control,
monitoring, and detailed analysis of the
progress of the drinking water quality,
tWIStweb is indispensable in Rhineland-
Palatinate and the key tool for the quality
control of the drinking water quality.
Reporting is also up to date with tWIStweb
and in accordance to the requirements
of the European Commission.
the reporting of the federal states to the
Federal Ministry of Health as well as the
European Union is completely paperless
and is distributed via a nationwide web
portal.
the reports primarily include information
about the coverage areas for which a uniform
water quality is assumed. According
to the size of these areas, the data is summarized
either for the Federal Government
or the European Union. A coverage area is
currently considered as relevant for the
European Union when more than 5,000
people are supplied with drinking water in
this area or, as a yearly average, the use of
1,000 m³ water per day is exceeded.
In over 15 years of developing tWIStweb,
nIS, together with the Federal State of
Rhineland Palatinate, succeeded in creating
a powerful and comprehensive program
for the management and control of
data collected through drinking water monitoring
according to German and European
requirements. tWIStweb manages
more than 21,600 drinking water monitoring
stations, approx. 2,000 water supply
companies, 4,000 operators of domestic
water supply installations and 1,000 self-