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<p class="MsoNormal">Interesting technique for determining pollutants<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a href="https://www.swissinfo.ch/eng/science-saturday_tadpoles-lighting-the-way-to-cleaner-water/43402896">https://www.swissinfo.ch/eng/science-saturday_tadpoles-lighting-the-way-to-cleaner-water/43402896</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:3.0pt;mso-line-height-alt:14.4pt"><b><span lang="EN" style="font-size:24.0pt;font-family:"Source Sans Pro";color:black">Tadpoles light the way to cleaner water<o:p></o:p></span></b></p>
<p class="MsoNormal" align="right" style="margin-left:0in;text-align:right;text-indent:-.25in;mso-list:l2 level1 lfo3;background:#F9F9F9">
<![if !supportLists]><span lang="EN" style="font-size:10.0pt;font-family:Symbol;color:#222222"><span style="mso-list:Ignore">ˇ<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:#222222"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-family:"Open Sans";color:#222222">This content was published on August 12, 2017 4:00 PMAug 12, 2017 - 16:00
</span><span lang="EN" style="font-size:12.0pt;font-family:"Open Sans";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-right:22.5pt;background:white"><span style="font-size:12.0pt;font-family:"Open Sans";color:#222222"><img border="0" width="640" height="426" style="width:6.6666in;height:4.4375in" id="Picture_x0020_1" src="cid:image001.jpg@01D320B2.4A692A70" alt="tadpoles in water"></span><span lang="EN" style="font-size:12.0pt;font-family:"Open Sans";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-right:22.5pt;background:white"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">The tadpoles light up in contact with micropollutants.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-right:22.5pt;background:white"><i><span lang="EN" style="font-size:12.0pt;font-family:"Open Sans";color:#222222">(oliver.dodd via flickr)</span></i><span lang="EN" style="font-size:12.0pt;font-family:"Open Sans";color:#222222">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">How to check for micropollutants in our drinking water? With fluorescent tadpoles, of course! The Swiss city of Lausanne is piloting a new method for testing
its water supplies.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">The tadpoles in question are genetically modified to light up luminously when they come in contact with endocrine disruptors present in water – the level of
their brightness generally corresponding to the level of micropollutants present.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">Following initial roll-outs in Brussels, the Swiss city of Lausanne is now using the technique to check up on its drinking water: concretely, by throwing a
posse of 50 tadpoles into water samples from pumping and purification centres, before analysing their luminosity.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">The results? So far, as expected. The larva light up like beacons when coming in contact with the dirty water arriving at the purification centre, while the
supposedly clean water coming from Lake Geneva is backed-up by the weak light of the tadpoles.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:3.0pt;mso-line-height-alt:14.4pt"><b><span lang="EN" style="font-size:18.0pt;font-family:"Source Sans Pro";color:#222222">Froggy style<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">The technique will contribute to better analysing the level of endocrine disruptors, micropollutants whose effects on health are not yet well understood, but
which have been shown to contribute to various developmental disorders.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">The tadpole indicators will allow engineers to strengthen filtration systems for dirty water heading back towards Lake Geneva.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">“In terms of drinking water, this could help raise the alarm and thus allow us to cut off water supplies to investigate whether there is a problem of pollution
in the source water or treated water,” said Christophe Méchouk of the water service of Lausanne to Swiss public broadcaster, RTS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black">The city of Geneva, according to RTS, may be next in line to test this latest technique, developed by French start-up Watchfrog.<o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN" style="font-size:12.0pt;font-family:"inherit",serif;color:black"><br>
swissinfo.ch with agencies/dos<o:p></o:p></span></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#000099">Deborah L. DeBiasi<br>
<b>Email: <a href="mailto:Deborah.DeBiasi@deq.virginia.gov"><span style="color:#000099">Deborah.DeBiasi@deq.virginia.gov</span></a><i><br>
</i></b>WEB site address: <a href="http://www.deq.virginia.gov/"><span style="color:#000099">www.deq.virginia.gov</span></a><br>
Virginia Department of Environmental Quality<br>
Office of Water Permits <br>
Industrial Pretreatment/Whole Effluent Toxicity (WET) Program<br>
PPCPs, EDCs, and Microconstituents<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#000099"><a href="http://www.deq.virginia.gov/Programs/Water/PermittingCompliance/PollutionDischargeElimination/Microconstituents.aspx"><span style="color:#000099">http://www.deq.virginia.gov/Programs/Water/PermittingCompliance/PollutionDischargeElimination/Microconstituents.aspx</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#000099">Mail: P.O. Box 1105, Richmond, VA 23218<br>
Location: 629 E. Main Street, Richmond, VA 23219<br>
PH: 804-698-4028 FAX: 804-698-4032</span><span style="font-size:9.0pt;color:navy"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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